Static converter control method - is used for DC load fed from three:phase mains and has semiconductor regulating units switched over during part of AC period

A control method for a static converter circuit used with d.c. load fed from three phase a.c. mains is designed to provide control for circuits with a common d.c. circuit or load (consumer). It eliminates as far as possible any mains or network reactions, and keeps the harmonics below a 5% threshold. Each controlled semiconductor regulating unit (1), comprising a transistor and series opposing diodes with their like electrodes (anodes) connected to the a.c. terminals, is switched over only during a fractional part of the a.c. period between the conducting and non-conducting mode corresponding to a harmonic time varying transformation or conversion.

A power factor correction system

Power factor corrector

DREIPHASIGES PULSGLEICHRICHTERSYSTEM MIT HOCHFREQUENT POTENTIALGETRENNTER AUSGANGSSPANNUNG

VORRICHTUNG ZUR ERHÖHUNG DER SPANNUNGSRESERVE DREIPHASIGER PULSGLEICHRICHTERSYSTEME MIT VERBINDUNG DES AUSGANGSSPANNUNGSMITTELPUNKTES MIT EINEM FIKTIVEN NETZSTERNPUNKT

SPANNUNGSUMSETZUNGSVORRICHTUNG FÜR EINEN GLEICHSPANNUNGSVERBRAUCHER

VORRICHTUNG ZUR ERZEUGUNG DER SOLLWERTE DER EINGANGSSTRÖME UND DER NETZSPANNUNGSVORSTEUERSIGNALE DER EINGANGSSTROMREGELUNG EINES DREIPHASEN-DREIPUNKT- PULSGLEICHRICHTERSYSTEMS BEI UNSYMMETRIE DES SPEISENDEN NETZES

TENSION CONVERSION DEVICE FOR A DC VOLTAGE CONSUMER

STATIC FREQUENCY CHANGER

VORRICHTUNG ZUR UMFORMUNG EINES DREIPHASIGEN SPANNUNGSSYSTEMS IN EINE VORGEBBARE, EINEN VERBRAUCHER SPEISENDE GLEICHSPANNUNG

DEVICE FOR THE SHAPING OF A THREE-PHASE TENSION SYSTEM INTO A GIVEN IN ADVANCE ONE, A CONSUMER FEEDING DC VOLTAGE

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

DRЕIРНАSIGЕS РULSGLЕIСНRIСНТЕRSYSТЕМ МIТ НОСНFRЕQUЕNТ РОТЕNТIАLGЕТRЕNNТЕR АUSGАNGSSРАNNUNG

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

DRЕIРНАSIGЕS РULSGLЕIСНRIСНТЕRSYSТЕМ МIТ НОСНFRЕQUЕNТ РОТЕNТIАLGЕТRЕNNТЕR АUSGАNGSSРАNNUNG

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

DRЕIРНАSIGЕS РULSGLЕIСНRIСНТЕRSYSТЕМ МIТ НОСНFRЕQUЕNТ РОТЕNТIАLGЕТRЕNNТЕR АUSGАNGSSРАNNUNG

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

DRЕIРНАSIGЕS РULSGLЕIСНRIСНТЕRSYSТЕМ МIТ НОСНFRЕQUЕNТ РОТЕNТIАLGЕТRЕNNТЕR АUSGАNGSSРАNNUNG

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

DRЕIРНАSIGЕS РULSGLЕIСНRIСНТЕRSYSТЕМ МIТ НОСНFRЕQUЕNТ РОТЕNТIАLGЕТRЕNNТЕR АUSGАNGSSРАNNUNG

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

DRЕIРНАSIGЕS РULSGLЕIСНRIСНТЕRSYSТЕМ МIТ НОСНFRЕQUЕNТ РОТЕNТIАLGЕТRЕNNТЕR АUSGАNGSSРАNNUNG

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

VОRRIСНТUNG ZUR ЕRНÖНUNG DЕR SРАNNUNGSRЕSЕRVЕ DRЕIРНАSIGЕR РULSGLЕIСНRIСНТЕRSYSТЕМЕ МIТ VЕRВINDUNG DЕS АUSGАNGSSРАNNUNGSМIТТЕLРUNКТЕS МIТ ЕINЕМ FIКТIVЕN NЕТZSТЕRNРUNКТ

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

SРАNNUNGSUМSЕТZUNGSVОRRIСНТUNG FÜR ЕINЕN GLЕIСНSРАNNUNGSVЕRВRАUСНЕR

Motor drive using flux adjustment to control power factor

POWER CONVERSION SYSTEM AND METHOD

A power conversion system includes a power transformer for receiving AC power at a first voltage from an input side and for delivering AC power at a second voltage to an output side. A power converter is also included in the power conversion system wherein the power converter includes an input side converter on the input side and an output side converter on the output side coupled through a plurality of DC links. A converter controller in the power converter provides control signals to the input side converter and the output side converter for regulating an active power and a reactive power flow through the power converter. Each of the input side converters and the output side converters includes at least two power converter transformers coupled between respective power converter bridges coupled to the plurality of DC links and the input side or to the plurality of DC links and the output side.

MULTI-PULSE CONVERTER CIRCUITS

An AC to DC converter with harmonic suppression is provided. The harmonic suppression is provided by forcing an instantaneous current conflict between series connected rectifier bridges 54, 80, such that a voltage waveform at 6 times the AC supply frequency of the AC supply is automatically generated. This waveform is then injected via a injection circuit to give harmonic cancellation.

MULTIPLE PHASE POWER SUPPLY HAVING CURRENT SHARED POWER FACTOR CORRECTION

A multi-phase (N) power supply is presented having current shared power factor correction, comprising. This includes N input rectifier filters each receiving a respective different one of an N phase AC input signal and providing therefrom one of N rectified signals. N single phase power factor correction pre-regulators receives a respective different one of the rectified signals and provide therefrom a regulated signal. A current sharing N way to single way multiplexing switch network for receiving the N regulated signals and provides therefrom a single output signal.

ACTIVE POWER FACTOR CORRECTION FOR AIRCRAFT POWER SYSTEM HARMONIC MITIGATION

Active power factor correction can be used to reduce input harmonics in an aircraft power distribution system. One or more power factor correction units (70) can be placed in the power distribution system to profile an input signal. Each power factor correction unit (70) can include a converter, such as an AC-DC converter, and can be placed in the power system bus (86) on the input side of the load (84). In an embodiment, a PFC unit can include a boost rectifier topology with active power factor correction for harmonics elimination. A power factor control circuit (72) is configured to output a control signal for the power factor correction units (70), the control signal being produced according to a harmonic of the DC output of the rectifier.

TWO-STAGE, THREE-PHASE BOOST CONVERTER AND METHOD OF REDUCING TOTAL HARMONIC DISTORTION FOR THE SAME

For use with a three-phase boost converter having a primary stage with a primary rectifier and a primary boost switch coupled between an input and output of the three-phase boost converter, an auxiliary stage, a method of reducing input current total harmonic distortion (THD) at the input of the three-phase boost converter, and a three-phase boost converter employing the auxiliary stage and method are provided. In one embodiment, the auxiliary stage includes: (1) an auxiliary rectifier coupled to the primary rectifier, (2) first, second and third auxiliary boost inductors interposed between the primary rectifier and the auxiliary rectifier and (3) an auxiliary boost switch, interposed between the auxiliary rectifier and the output, that conducts to induce corresponding phase currents through the first, second and third auxiliary boost inductors thereby reducing input current total harmonic distortion (THD) at the input of the three-phase boost converter.

Electronic power converter and method for its control.

Die Erfindung betrifft einen elektronischen Leistungswandler sowie ein Verfahren zur Steuerung eines solchen Wandlers. Ein elektronischer Leistungswandler weist Teiltransformatoren (2) auf, die zur Bildung einer Summe von Ausgangsspannungen kombiniert sind. Für jede der Phasen ist eine Schalteinrichtung (1a, 1b, 1c) dazu eingerichtet, eine positive oder negative Phasenspannung oder die Spannung null an die primärseitige Wicklung eines zugeordneten Teiltransformators (2) anzulegen. Im Betrieb des Wandlers wird mit einer Modulationsfrequenz eine Folge von Spannungspulsen mit der alternierend positiven und negativen jeweiligen Phasenspannung an die primärseitige Wicklung des zugeordneten Teiltransformators (2) gelegt, wobei eine Zeitdauer jedes der Spannungspulse proportional zum momentanen Betrag der jeweiligen Phasenspannung ist, und wobei die Spannungspulse der Schalteinrichtungen (1a, 1b, 1c) synchron zueinander erzeugt werden und jeweils steigende und fallende Flanken der Spannungspulse ...

Alternating current/direct current (AC/DC) converter for electric vehicle, has bridge circuit comprising three connection points that are connected to DC voltage side center through four-quadrant switches respectively

An upper DC/DC converter (9) is connected between positive terminal of bridge circuit (1) and positive terminal (17) of AC/DC converter. A lower DC/DC converter (13) is connected between negative terminal of bridge circuit and negative terminal (18) of AC/DC converter. A lower connection point (11) of upper DC/DC converter and an upper connection point (15) of lower DC/DC converter are connected with each other to form DC voltage side center. Three phase connection points (3-5) of bridge circuit are connected to DC voltage side center through four-quadrant switches (6-8) respectively. An independent claim is included for method for controlling AC/DC converter.

Electronic power converter and method for its control.

Die Erfindung betrifft einen elektronischen Leistungswandler sowie ein Verfahren zur Steuerung eines solchen Wandlers. Ein elektronischer Leistungswandler weist Teiltransformatoren (2) auf, die zur Bildung einer Summe von Ausgangsspannungen kombiniert sind. Für jede der Phasen ist eine Schalteinrichtung (1a, 1b, 1c) dazu eingerichtet, eine positive oder negative Phasenspannung oder die Spannung Null an die primärseitige Wicklung eines zugeordneten Teiltransformators (2) anzulegen. Im Betrieb des Wandlers wird mit einer Modulationsfrequenz eine Folge von Spannungspulsen mit der alternierend positiven und negativen jeweiligen Phasenspannung an die primärseitige Wicklung des zugeordneten Teiltransformators (2) gelegt, wobei eine Zeitdauer jedes der Spannungspulse proportional zum momentanen Betrag der jeweiligen Phasenspannung ist, und wobei die Spannungspulse der Schalteinrichtungen (1a, 1b, 1c) synchron zueinander erzeugt werden und jeweils steigende und fallende Flanken der Spannungspulse ...

Device for converting three phase alternating current voltage into direct current voltage for three phase buck-boost converter pulse rectifier system, has bridge section whose phase input has negative value of input potential of section

The device has a boost converter output stage (3) with a positive output voltage busbar (16) and a negative output voltage busbar (26). A boost converter power transistor has a series diode connected in a flux direction against a cathode (41) of a lower diode (22) of a bridge section (7), and is interconnected in a transistor start-up interval of the output stage, which is directed to the lower diode of the bridge section. A phase input (35) of the bridge section has a negative value of an input potential of the bridge section with an interconnected control switch.

Hybrid three-phase AC-to-DC converter and method for controlling the same.

Die Erfindung betrifft einen AC/DC-Konverter zur Leistungsübertragung von einer dreiphasigen Wechselspannungsseite an eine Gleichspannungsseite mit einer positiven Anschlussklemme (17) und einer negativen Anschlussklemme (18) und/oder umgekehrt, der eine dreiphasige Brückenschaltung (1) mit drei Anschlusspunkten (3, 4, 5) für jeweils eine Eingangsphase an ihrer Wechselspannungsseite und mit je einem positiven und einem negativen Anschlusspunkt an ihrer Gleichspannungsseite aufweist. Es ist zwischen dem positiven Anschlusspunkt der Brückenschaltung und der positiven Anschlussklemme (17) des AC/DC-Konverters ein oberer DC/DC-Konverter (9) mit einem unteren Anschlusspunkt (11) als Bezugspunkt geschaltet, und zwischen dem negativen Anschlusspunkt der Brückenschaltung und der negativen Anschlussklemme (18) des AC/DC-Konverters ein unterer DC/DC-Konverter (13) mit einem oberen Anschlusspunkt (15) als Bezugspunkt geschaltet. Dabei sind der untere und der obere Anschlusspunkt (11, 15) miteinander ...

The AC/DC converter

Ein erfindungsgemässer AC/DC-Konverter weist einen Eingangsteil (1, 2) mit einer dreiphasigen Brückenschaltung (1) und mit je einem positiven und einem negativen Ausgang (x, z) an einer Gleichspannungsseite auf, wobei – wechselspannungsseitige Anschlusspunkte über Vierquadrantenschalter (6, 7, 8) mit einem mittleren Ausgang (y) des Eingangsteils verbindbar sind, – eine Filteranordnung (51) mit einer Dreieckschaltung oder Sternschaltung von Filterkapazitäten (C F ) an die Ausgänge (x, y, z) des Eingangsteils (1, 2) angeschlossen ist, – zwischen einem positiven Ausgang der Filteranordnung (51) und einer positiven Anschlussklemme (p) des AC/DC-Konverters ein oberer DC/DC-Konverter (9) mit einem unteren Anschlusspunkt (11) als Bezugspunkt geschaltet ist, und – zwischen einem negativen Ausgang der Filteranordnung (51) und einer negativen Anschlussklemme (n) des AC/DC-Konverters ein unterer DC/DC-Konverter (13) mit einem oberen Anschlusspunkt (15) als Bezugspunkt geschaltet ist, – wobei der untere ...

AC-To-DC Converter

Ein erfindungsgemässer AC/DC-Konverter weist einen Eingangsteil (1, 2) mit einer dreiphasigen Brückenschaltung (1) und mit je einem positiven und einem negativen Ausgang (x, z) an einer Gleichspannungsseite auf, wobei – wechselspannungsseitige Anschlusspunkte ( , , ) über Vierquadrantenschalter (6, 7, 8) mit einem mittleren Ausgang (y) des Eingangsteils verbindbar sind, – eine Filteranordnung (51) mit einer Dreieckschaltung oder Sternschaltung von Filterkapazitäten (C F ) an die Ausgänge (x, y, z) des Eingangsteils (1, 2) angeschlossen ist, – zwischen einem positiven Ausgang ( ) der Filteranordnung (51) und einer positiven Anschlussklemme (p) des AC/DC-Konverters ein oberer DC/DC-Konverter (9) mit einem unteren Anschlusspunkt (11) als Bezugspunkt geschaltet ist, und – zwischen einem negativen Ausgang ( ) der Filteranordnung (51) und einer negativen Anschlussklemme (n) des AC/DC-Konverters ein unterer DC/DC-Konverter (13) mit einem oberen Anschlusspunkt (15) als Bezugspunkt geschaltet ist ...

Magnetic throttle, inverter converter portion.

Die Erfindung betrifft eine magnetische Drossel, welche zur Verwendung in Verbindung mit einer Umrichterbrücke zum Anschluss an n Phasen mit jeweils m Brückenzweigen pro Phase vorgesehen ist. Die Drossel weist einen Kern mit n Teilkernen auf, wobei jeder der Teilkerne jeweils einen Anfangsknoten und einen Endknoten und m Kernabschnitte aufweist, welche den Anfangsknoten und den Endknoten verbinden, und jeder der Kernabschnitte eine Wicklung mit einem ersten ( ) und einem zweiten Wicklungsanschluss aufweist. Die zweiten Wicklungsanschlüsse der Wicklungen desselben Teilkernes bilden einen gemeinsamen Wicklungsanschlusspunkt . Die Wicklungen auf den Kernabschnitten sind so orientiert, dass in jedem Kernabschnitt ein durch die Wicklung in den gemeinsamen Wicklungsanschlusspunkt fliessender Strom eine magnetische Spannung vom Anfangsknoten zum Endknoten des Teilkernes erzeugt. Die Teilkerne sind über ihre Anfangs- und Endknoten miteinander verbunden und bilden einen Kreis. Ferner betrifft die ...

Magnetische Drossel, Umrichterabschnitt und Umrichter.

Die Erfindung betrifft eine magnetische Drossel welche zur Verwendung in Verbindung mit einer Umrichterbrücke. zum Anschluss an n Phasen mit jeweils m Brückenzweigen pro Phase vorgesehen ist. Die Drossel weist einen Kern mit n Teilkernen auf, wobei jeder der Teilkerne jeweils einen Anfangsknoten und einen Endknoten und m Kernabschnitte aufweist, welche den Anfangsknoten und den Endknoten verbinden, und jeder der Kernabschnitte eine Wicklung mit einem ersten (p1, p2, n1, n2; und einem zweiten Wicklungsanschluss (p,n) aufweist. Die zweiten Wickltingsziiischlüsse der Wicklungen desselben bilden Teilkernes bilden einen gemeinsamen Wicklungsanschlusspunkt (p, n) bilden. Die Wicklungen auf den Kernabschnitten sind so orientiert, dass in jedem Kernabschnitt ein durch die Wicklung in den gemeinsamen Wicklungsanschlusspunkt fliessender Strom eine magnetische Spannung vom Anfangsknoten zum Endknoten des Teilkernes Die Teilkerne sind über ihre Anfangs- und Endknoten miteinander verbunden und bilden ...

A method of regulating a three-phase pulse rectifier system.

In einem erfindungsgemässen Verfahren zum Regeln eines Dreiphasen-Pulsgleichrichtersystems (1, 2, 3), welches eine Dreiphasen-Brückenschaltung (2), zum Leistungsaustausch zwischen einem Dreiphasennetz (1) mit einer Zwischenkreiskapazität (C pn ) und einem Lastkonverter (3) zum Leistungsaustausch zwischen der Zwischenkreiskapazität (C pn ) und einer Last aufweist, wird in zeitlich aufeinanderfolgenden Abschnitten jeweils eine erste Netzphase, welche momentan einen höchsten Spannungswert bezüglich der anderen Netzphasen aufweist, an einen positiven Anschlusspunkt der Zwischenkreiskapazität (C pn ) geschaltet, eine zweite Netzphase, welche momentan einen anderen Spannungswert bezüglich der anderen Netzphasen aufweist, an einen negativen Anschlusspunkt der Zwischenkreiskapazität (C pn ) geschaltet, in einer dritten Netzphase durch Takten des an diese Netzphase angeschlossenen Brückenzweiges ein sinusförmiger Strom erzeugt, und durch Variation der Spannung der Zwischenkreiskapazität (C pn ) ...

Verfahren zum Regeln eines Dreiphasen-Pulsgleichrichtersystems.

In einem erfindungsgemässen Verfahren zum Regeln eines Dreiphasen-Pulsgleichrichtersystems (1, 2, 3), welches eine Dreiphasen-Brückenschaltung (2), zum Leistungsaustausch zwischen einem Dreiphasennetz (1) mit einer Zwischenkreiskapazität (C pn ) und einem Lastkonverter (3) zum Leistungsaustausch zwischen der Zwischenkreiskapazität (C pn ) und einer Last aufweist, wird in zeitlich aufeinanderfolgenden Abschnitten jeweils • eine erste Netzphase, welche momentan einen höchsten Spannungswert bezüglich der anderen Netzphasen aufweist, an einen positiven Anschlusspunkt der Zwischenkreiskapazität (C pn ) geschaltet, • eine zweite Netzphase, welche momentan einen anderen Spannungswert bezüglich der anderen Netzphasen aufweist, an einen negativen Anschlusspunkt der Zwischenkreiskapazität (C pn ) geschaltet, • in einer dritten Netzphase durch Takten des an diese Netzphase angeschlossenen Brückenzweiges ein sinusförmiger Strom erzeugt, und • durch Variation der Spannung der Zwischenkreiskapazität ...

Potentialgetrennter AC-DC-Konverter.

Die Erfindung betrifft einen Konverter zur Übertragung von elektrischer Energie zwischen einem Wechselspannungssystem an Netzeingangsklemmen (a, b, c) und einem Gleichspannungssystem an Gleichspannungsklemmen (p, n), welcher aufweist: Zwischenknoten (x, y, z), wobei insbesondere gleich viele Zwischenklemmen wie Netzeingangsklemmen (a, b, c) vorliegen; ein Phasenauswahlnetzwerk (5) zur wahlweisen Verbindung jeder der Netzeingangsklemmen (a, b, c) mit jedem der Zwischenknoten (x, y, z); eine primärseitige Inverterbrücke (6) zur wahlweisen Verbindung jedes der Zwischenknoten (x, y, z) mit einem von zwei primärseitigen Anschlüssen (g, h); ein induktives Netzwerk zur potentialgetrennten Energieübertragung zwischen den zwei primärseitigen Anschlüssen (g, h) und zwei sekundärseitigen Anschlüssen (j, k); eine sekundärseitige Gleichrichterbrücke (3) zur wahlweisen Verbindung jedes der zwei sekundärseitigen Anschlüsse (j, k) mit jeder der Gleichspannungsklemmen (p, n).

Potentialgetrennter AC-DC-Konverter.

Die Erfindung betrifft einem Konverter zur Übertragung von elektrischer Energie zwischen einem Wechselspannungs- system an Netzeingangsklemmen (a, b, c) und einem Gleichspannungs-System an Gleichspannungsklemmen (p, n), weist auf: • Zwischenknoten (x, y, z), wobei insbesondere gleich viele Zwischenknoten (x, y, z) wie Netzeingangsklemmen (a, b, c) vorliegen; • ein Phasenauswahlnetzwerk (5) zur wahlweisen Verbindung jeder der Netzeingangsklemmen (a, b, c) mit jedem der Zwischenknoten (x, y, z); • eine primärseitige Inverterbrücke (6) zur wahlweisen Verbindung jedes der Zwischenknoten (x, y, z) mit einem von zwei primärseitigen Anschlüssen (g, h); • ein induktives Netzwerk zur potentialgetrennten Energieübertragung zwischen den zwei primärseitigen Anschlüssen (g, h) und zwei sekundärseitigen Anschlüssen (j, k); • eine sekundärseitige Gleichrichterbrücke (3) zur wahlweisen Verbindung jedes der zwei sekundärseitigen Anschlüsse (j, k) mit jeder der Gleichspannungsklemmen (p, n).

Three-phase rectifying circuit with power factor correction and harmonic suppressing circuit

SYSTEM OF ACTIVE RECTIFICATION IMPROVES HAS CORRECTION OF THE POWER-FACTOR.

POLYPHASE VOLTAGE TRANSFORMING AND RECTIFYING DEVICE

NPC CONVERTER FOUR ARMS FOR THE ELECTRIC VEHICLES AND BIDIRECTIONAL CHARGER COMPRISING SUCH A CONVERTER

Delivery system Of ELECTICITE IN the AIRCRAFT

L'invention propose un système de distribution d'électricité (100) pour un aéronef. Le système de distribution d'électricité (100) comporte un premier faisceau de câblages (150) connecté à une source d'alimentation en électricité (120), au moins un convertisseur de puissance intégré (180) à découpage connecté à la source d'alimentation en électricité (120) par l'intermédiaire du premier faisceau de câblages (150), et au moins une charge électrique (170) connectée à une sortie respective (362) d'un convertisseur de puissance intégré respectif (180) à découpage par l'intermédiaire d'un second faisceau de câblages (160). A l'aide d'un ou de plusieurs convertisseurs de puissance intégrés (180) à découpage selon diverses formes de réalisation de la présente invention, il est possible de réaliser un allègement du poids total des câblages nécessaires à la distribution d'électricité dans l'aéronef.

Reversible charging device for motor vehicle

Alternating current-direct current conversion device for use as rectifier in industrial application, has control unit attached with bidirectional switch for controlling device during alternating current-direct current conversion

Dispositif de conversion alternatif-continu à relier, côté alternatif, à une source de tension alternative (2) et, côté continu, à un dispositif utilisateur (3), comportant un convertisseur alternatif-continu (1) avec plusieurs cellules de commutation (1.1) à deux interrupteurs (K1, K2) montés en série. Elles comportent une borne milieu (A) entre les interrupteurs et deux bornes extrêmes (B, C), sont montées en parallèle. Deux dispositifs de stockage d'énergie (C1, C2) en série sont montés aux bornes extrêmes (B, C) du convertisseur, côté continu, ils possèdent un nœud commun (N1). Un interrupteur bidirectionnel (4) associé à chaque cellule (1.1) est monté entre le point milieu (A) de la cellule (1.1) et le nœud (N1). Une inductance (L) associée à chaque cellule (1.1) est montée entre la source de tension (2) et la borne milieu (A). Des moyens de commande (5) de l'interrupteur bidirectionnel (4) le rendent passant uniquement à des moments où un courant alimentant la cellule associée (1.1 ...

BATTERY CHARGER BIDIRECTIONAL ELECTRIC STORAGE BATTERIES.

L'invention concerne un chargeur (1) de batterie (5) d'accumulateurs électriques pour un véhicule automobile électrique, dans lequel au moins deux bras de pont (31, 32) d'un redresseur de Vienne (3) comprennent un transistor à effet de champ à grille isolée bidirectionnel (312, 322, 334) et une diode (313, 323, 333), montés de part et d'autre du point milieu (310, 320) du bras de pont (31, 32) correspondant, tandis que les autres bras de pont (33) comprennent chacun deux diodes (332, 333) montées de part et d'autre du point milieu (330) du bras de pont (33) correspondant; et en ce que ledit étage convertisseur continu-continu (4) comprend deux dispositifs de conversion continu-continu (41, 42), chacun étant connecté en entrée en parallèle avec l'un desdits condensateurs de sortie (37, 38) de l'étage de correction du facteur de puissance (3) et en sortie aux bornes de ladite batterie (5), de telle sorte que le chargeur (1) est apte à autoriser le passage d'un courant électrique depuis la ...

DEVICE FOR TRANSFORMING AND FOR RECTIFYING POLYPHASE VOLTAGE

Delivery system Of ELECTRICITY IN the AIRCRAFT

Convertisseur de puissance intégré (180, 280, 380) à découpage destiné à servir dans un aéronef, le convertisseur de puissance intégré (180, 280, 380) à découpage comportant : des circuits de conversion de tension servant à convertir une tension d'entrée à un premier niveau en une tension de sortie à un second niveau ; des connecteurs de sortie (260) pour connecter la tension de sortie à une ou plusieurs charges (270) ; et des circuits de commande d'alimentation à semi-conducteurs pour réguler la tension et/ou l'intensité de sortie du courant fourni par les connecteurs de sortie (260) à la/les charges (270).

Circuit for supplying a load with a direct voltage

In a circuit for supplying a load with a direct voltage, a diode is connected in a current path for supplying the load, a step-up converter is connected in the current paths parallel with the diode, and a control unit drives the step-up converter according to predetermined criteria in order to supply the load at least partially via the step-up converter. Such a circuit has advantageous power consumption characteristics. In comparison to conventional circuits that require an expensive filter, this circuit is more economical and/or has a smaller structural size.

Three phase AC to DC voltage converter with power line harmonic current reduction

A three phase AC to DC voltage converter includes separate single phase AC to DC converters for each phase of a three phase source with the DC voltage output of the three converters paralleled and controlled to provide necessary regulation. Each of the single phase AC to DC converters includes a full-wave bridge rectifier feeding a substantially resistive load including an inverter and a second single phase full-wave bridge rectifier. To the extent that each inverter and second single phase full-wave bridge rectifier approximate a resistive load, the source current harmonics are reduced. Additionally, the triplen harmonics produced in the three phase source lines by each of the three AC to DC converters are cancelled by the triplen harmonics produced in the three phase source lines by the remaining two AC to DC converters.

Reactive power control

A reactive power compensator is provided which uses a power converter to deliberately draw or supply out of phase currents such that these can develop voltage drops of a desired phase angle across the reactance of a cable, to improve that total voltage loss and/or system power factor.

Data center systems including high voltage direct current power generators

Some embodiments include a high voltage direct current (HVDC) power generator system for information technology (IT) racks. The HVDC power generator system can include a three-phase alternating current (AC) transformer having a primary winding and a plurality of secondary windings. A plurality of three-phase bridge rectifier circuits can be electrically coupled respectively to the plurality of secondary windings. The HVDC power generator system can include output terminals for powering its load. A first string of bridge rectifier circuits can be in series with each other and a first inductor. A second string of bridge rectifier circuits can be in series with each other and a second inductor. The first and second strings can be electrically coupled in parallel to the output terminals.

Power system with zero voltage switching

A DC/DC converter includes first and second bridges comprising a plurality of switch elements and a plurality of coupling capacitors. Each coupling capacitor couples one of the switch elements of the first bridge to one of the switch elements of the second bridge. The first and second bridges are connected to a transformer comprising a first primary winding, a second primary winding, and a secondary winding. A coupled inductor comprises first and second inductors and is connected to the transformer so that the first and second primary windings are inductively coupled through the coupled inductor.

Switch mode power converter for three phase power

A device and system for converting a three phase power input to a direct current output, and method of operating the device and system, are provided. The device includes a rectifier circuit for rectifying the three phase power input into a plurality of rectified outputs, a converter circuit for converting each of the rectified outputs, and a control circuit for generating the control signal based at least in part on the single direct current output. Each of the rectified outputs may have a common first mean voltage level, which is converted to a second mean voltage level based on a control signal. Each of the rectified outputs at the second mean voltage level are capable of being combined into a single direct current output.

Power conversion system and method

A power conversion system includes a power transformer for receiving AC power at a first voltage from an input side and for delivering AC power at a second voltage to an output side. A power converter is also included in the power conversion system wherein the power converter includes an input side converter on the input side and an output side converter on the output side coupled through a plurality of DC links. A converter controller in the power converter provides control signals to the input side converter and the output side converter for regulating an active power and a reactive power flow through the power converter. Each of the input side converters and the output side converters includes at least two power converter transformers coupled between respective power converter bridges coupled to the plurality of DC links and the input side or to the plurality of DC links and the output side.

METHODS AND SYSTEMS FOR CONTROLLING CURRENT SOURCE RECTIFIERS

Current source rectifiers (CSR) and methods for a power source including three phase lines are provided herein. The CSR includes a rectifier having a plurality of switches, each switch of the plurality of switches coupled to an associated phase line of the three phase lines. The rectifier operable to receive an alternating current (AC) input voltage and provide a direct current (DC) output voltage. The CSR also includes a controller configured to control operation of the switches in accordance with a first switching sequence when measured input voltages on at least two phase lines of the three phase lines are outside of a predetermined voltage range, and control operation of the switches in accordance with a second switching sequence when the measured input voltages on the at least two phase lines are within the predetermined voltage range.

Power converter and method for operating a power converter

A power converter includes at least three booster modules for transferring power at least from an AC input side to a DC output side. Each booster module has a galvanically separated input and output, and can be operated as a power factor correction module. The input of a first booster module is connected to the input side, and its output is connected to the output side for providing a first output current to the output side. The input of a second booster module is connected to the input side, and its output is connected to a buffer capacitor for providing a second output current to the buffer capacitor. The input of a third booster module is connected to the buffer capacitor and its output is connected to the output side for providing a third output current to the output side.

Enhanced conduction angle power factor correction topology

The invention in the simplest form is an improved AC inductor circuit design that is ideal for single boost, or split phase dual boost topologies, and other poly-phase systems improving input power factor and total harmonic distortion. The implementation is efficient, reliable, and flexible, utilizing a wide range of input voltages and currents (including synthesized input voltage waveforms other than sinusoids), and variable frequency voltage sources such as flywheels or micro-turbines, switches, such as IGBT, MOSFET, in combination with AC inductors and typical high frequency rectifier diodes, high frequency rectifiers, or even some line frequency rectifier diodes. The present invention is applicable to power supplies, motor drives, power conditioners, power generation equipment, hybrid power conditioning and distribution equipment, appliances, and flywheels.

METHOD FOR CONTROLLING A CHARGING DEVICE ON BOARD AN ELECTRIC OR HYBRID VEHICLE

A method controls a battery-charging device including a rectifier stage of three-phase Vienna rectifier type capable of being connected to a single-phase or three-phase electrical power supply grid and linked by first and second DC power supply buses to a DC-to-DC converter stage including first and second LLC resonant converters that are connected to first and second DC power supply bus capacitors, respectively, which are positioned on each of the buses at the output of the rectifier stage. The power supply for the charging device is single phase and the voltage of the first and second DC power supply bus capacitors is regulated independently by the first and second LLC resonant converters so as to provide a fixed regulated voltage on each of the DC power supply buses.

AC-DC converter

A switched-mode AC-DC converter intended to deliver a DC output voltage Voutbetween a first output terminal and a second output terminal, the converter comprising at least one conversion chain intended to convert an AC input voltage applied between an input terminal and a neutral point, the conversion chain comprising: a first output capacitor comprising one terminal connected to the first output terminal and another terminal connected to a second terminal of the input switch, a second output capacitor with the same capacitance as the first output capacitor and with a higher capacitance than the capacitance of the link capacitor, the second output capacitor comprising one terminal connected to the second output terminal and another terminal connected to the second terminal of the input switch.

THREE-PHASE POWER FACTOR CONTROLLER IMPLEMENTED WITH SINGLE-PHASE POWER FACTOR CORRECTION CONTROLLER

A PFC correction circuit includes first, second, and third phase inputs coupled to three-phase power mains, with a three-phase full-wave rectifying bridge connected to an input node. First, second, and third boost inductors are respectively connected between first, second, and third phase inputs and first, second, and third taps of the three-phase full-wave rectifying bridge. A boost switch is connected between the input node and ground, and a boost diode is connected between the input node and an output node. A multiplier input driver generates a single-phase input signal as a replica of a signal at the three-phase power mains after rectification. A single-phase power factor controller generates a PWM signal from the single-phase input signal. A gate driver generates a gate drive signal from the PWM signal. The boost switch is operated by the gate drive signal.

Arrangement for the suppression of current harmonics

A wiring arrangement and an appliance for limiting the harmonics of a current supplied to a frequency converter from an AC electricity supply network, which frequency converter can be connected to a three-phase AC electricity supply network, in which frequency converter is an uncontrolled network bridge (10) for rectifying the AC voltage of the AC electricity supply network, a DC intermediate circuit, in which is a filtering capacitor (CDC). and a load bridge (11) provided with power semiconductor switches for forming three-phase AC voltage (U, V, W), and which load bridge can be controlled with pulse-width modulation by means of a control unit, and in which DC intermediate circuit is a choke, in which is a choke part (L1, L2) arranged on both the positive and the negative pole, and in which wiring arrangement is an absorption circuit for limiting the harmonics of the current supplied from the AC electricity supply network, in which the absorption circuit is arranged in the DC intermediate ...

DC OUTPUT VOLTAGE REGULATION IN CONVERTER FOR AIR CONDITIONING SYSTEMS

A converter (200) for an air conditioning system including a rectifier section (320) configured to receive an AC input voltage; a voltage regulator section (330) coupled to the rectifier section (320), the voltage regulator section configured to control a DC output voltage across a positive DC bus (321) and a negative DC bus (322); and a controller (340) in communication with the rectifier section (320) and the voltage regulator section (330), the controller (340) configured to control the converter (200) such that the DC output voltage is greater than AC input voltage by an offset.

Managed Multi-phase Operation

Three phase A.C. to D.C. voltage converter with improved power line harmonic current reduction

A three phase a.c. to d.c. voltage converter is disclosed. First, second and third rectifier circuits rectify respective phases of a three phase a.c. source into respective varying d.c. voltages. First, second and third converters connected to the output of the first, second and third rectifier circuits, respectively, each converting the varying d.c. input generated by its associated rectifier circuit into a substantial d.c. voltage. Each of the converters also generate at least one isolated d.c. voltage. At least one of the isolated d.c. voltages is applied to the input of each of the converters to reduce the harmonic currents fed back into the a.c. line.

Power Distribution and Conversion in Aircraft

A power distribution system for an aircraft comprising a first wiring harness (150) between a power supply (120) and at least one integrated switching power converter (180) and at least one electrical load (170) connected to the output of the power converter through a second wiring harness (160). The converter is located closer to the load than the power supply, the first wiring harness carries a greater voltage than the second wiring harness in order to reduce weight. The converter includes solid state control circuitry for regulating the output voltage and providing protection to output connectors preferably on an integrated circuit with the converting circuitry. Preferably the control circuit is operable to implement algorithmic processing and pulse-width modulation of switching converters.

Multi-phase shift transformer based ac-dc converter

Gleichrichterschaltung

Gleichrichterschaltung mit einer dreiphasigen Gleichrichtanordnung (1) mit einem dreiphasigen netzseitigen Eingang (3) und einem gleichstromseitigen Ausgang (4), bei der jede der drei Phasen (U,V,W) am netzseitigen Eingang (3) jeweils mit einem Schaltelement (S1, S2, S3) zu einem ersten Polanschluss (A) einer dreipoligen Schaltung (5) zuschaltbar ist, und ein zweiter und dritter Polanschluss (B,C) der dreipoligen Schaltung (5) jeweils mit einer Ausgangsleitung (PDC,NDC) des gleichstromseitigen Ausganges (4) verbunden ist. Der erste Polanschluss (A) bildet einen Mittelpunktanschluss (M) zweier Schaltzweige zum zweiten und dritten Polanschluss (B, C), wobei die beiden Schaltzweige jeweils aus zumindest zwei in Reihe geschalteten zweipoligen Schalteinheiten (HBi) gebildet werden, von denen jeweils zumindest eine Schalteinheit (FHBi) in Form von vier als Vollbrücke geschalteten, steuerbaren Halbleiterventilen (S) ausgeführt ist, und zumindest eine Schalteinheit (hHBi) in Form zweier als Halbbrücke ...

VORRICHTUNG ZUM SPANNEN VON DRÄHTEN

Vorrichtung zum Spannen von Drähten oder dergleichen, wobei ein Befestigungsteil (1) mit mindestens einer Öffnung (6) zur Aufnahme eines gesonderten Gewindeteils (2) vorgesehen ist, der eine Gewindebohrung (2) zur Aufnahme eines einen Draht (4) tragenden Gewindebolzens (3) aufweist.

SWITCHING CONFIGURATION FOR REGULAR FEED

Adaptive on-time control for power factor correction stage light load efficiency

Light load efficiency of a power factor correction circuit is improved by adaptive on-time control and providing for selection between a continuous conduction mode and a discontinuous conduction mode wherein the discontinuous conduction mode increases time between switching pulses controlling connection of a cyclically varying voltage to a filter/inductor that delivers a desired DC voltage and thus can greatly reduce the switching frequency at light loads where switching frequency related losses dominate efficiency. The mode for controlling switching is preferably selected for each switching pulse within a half cycle of the cyclically varying input voltage. A multi-phase embodiment allows cancellation of EMI noise at harmonics of the switching frequency and adaptive change of phase angle allows for cancellation of dominant higher order harmonics as switching frequency is reduced.

Active rectification control

An active rectification system includes an active rectifier, a pulse width modulation (PWM) control, and a closed loop vector control. The PWM control portion is configured to control switching of the active rectifier and the closed loop vector control is configured to generate the required duty cycles for the PWM signals that regulate the DC voltage output and force a three-phase current input of the active rectifier to align with a three-phase pole voltage input of the active rectifier.

Active rectification output capacitors balancing algorithm

An active rectification system includes an active rectifier that converts an alternating current (AC) input to a direct current (DC) output. The active rectifier includes a plurality of switching devices and at least a first output capacitor and a second output capacitor connected at the DC output of the active rectifier. A controller includes a DC output regulation portion and an output capacitor balancing portion, wherein the DC output regulation portion monitors the DC output and in response generates control signals for regulating the DC output to a desired value. The output capacitor balancing portion monitors first and second output capacitor voltages associated with the first and second output capacitors, respectively, and generates an accumulated adjustment value that modifies the control signals provided by the DC output regulation portion to balance the first and second output capacitor voltages.

Three phase boost converter to achieve unity power factor and low input current harmonics for use with ac to dc rectifiers

A voltage source inverter comprises a zigzag transformer providing a neutral point. A rectifier unit comprises three single phase boost converters each connected to one of the three phases of AC power and the neutral point and comprising a bridge rectifier converting single phase AC power to DC power and using a boost inductor with a boost switch and blocking diode to develop a DC output. An inverter receives DC power and converts DC power to AC power. A link circuit is connected between each boost converter DC output and the inverter circuit and comprises a DC bus having first and second rails to provide a relatively fixed DC voltage for the inverter and a DC bus capacitance across the first and second rails to smooth voltage ripple. A switch controller controls operation of the boost switches using average current control for each of the boost converters.

Rectifier circuit and electronic device using same

A rectifier circuit includes a three-phase alternating current (AC) voltage, a first rectifier unit, a second rectifier unit, a third rectifier unit, a first voltage output terminal, a second voltage output terminal, a first energy storing circuit and a second energy storing circuit. The three-phase AC voltage generates a first AC voltage, a second AC voltage, and a third AC voltage, and outputs them to the first rectifier circuit, a second rectifier circuit, and a third rectifier circuit correspondingly. The first energy storing circuit and the second storing circuit are connected in series and are coupled between the first voltage output terminal and the second voltage output terminal, to drive a load. In a positive period of each AC voltage, the second energy storing circuit is charged by each rectifier unit. In a negative period of each AC voltage, the first energy storing circuit is charged by each rectifier unit.

ACTIVE VOLTAGE BUS SYSTEM AND METHOD

A voltage converter () having a first bidirectional voltage line (), a second bidirectional voltage line (), a power storage element (L) arranged between the first bidirectional voltage line and the second bidirectional voltage line, a switch element electronically coupled to the power storage element, a controller () for controlling the switch, and the controller configured and arranged to adjust a current flow between the first voltage line and the second voltage line such that a voltage level on the second bidirectional voltage line is substantially maintained at a target DC voltage. 122-. (canceled)23. A method of operating a voltage bus system comprising the steps of:providing a voltage converter comprising a power supply input, an output DC voltage bus and a command;causing said voltage converter to provide a DC voltage at a first voltage level on said output DC voltage bus;receiving a target voltage change command; anddynamically adjusting said voltage converter to cause said voltage converter to provide a DC voltage at a second voltage level on said output DC voltage bus.24. The method as set forth in claim 23 , wherein said step of providing a voltage converter comprises the step of providing said voltage converter on an aircraft.25. The method as set forth in claim 23 , and further comprising the step of connecting a load to said output DC voltage bus.26. The method as set forth in claim 25 , wherein said step of dynamically adjusting said voltage converter is configured and arranged to cause said load efficiency to change.27. The method as set forth in claim 25 , wherein said load is an electric motor.28. The method as set forth in claim 27 , wherein said step of dynamically adjusting said voltage converter causes said electric motor to operate with a changed Kt value.29. A power factor correction circuit controller comprising:an AC input voltage feedback input;an input current feedback input;an output voltage feedback input;a voltage reference;a ...

POWER CONVERSION DEVICE

A power conversion device includes a reactor, a single-phase inverter, and a single-phase converter which are connected in series to each other between an AC power supply and a smoothing capacitor, and performs power conversion between AC voltage of the AC power supply and DC voltage of the smoothing capacitor. The power conversion device includes a control unit which controls switch elements of the single-phase inverter and switch elements of the single-phase converter so that charging operation and discharging operation of the DC capacitor are performed in one switching cycle of the single-phase inverter and the charging amount and the discharging amount thereof are equal to each other. 1. A power conversion device which has a reactor , an inverter , and a converter , and which performs power conversion between AC voltage of an AC power supply and DC voltage of a smoothing capacitor , whereinthe inverter includes inverter AC terminals, a DC capacitor, and switch elements, and switches a voltage level between the inverter AC terminals to a positive/negative value of voltage of the DC capacitor, or zero voltage, through switching operations of the switch elements, andthe converter includes converter AC terminals connected to the AC power supply via the reactor and the inverter AC terminals connected in series to each other, converter DC terminals connected to the smoothing capacitor, and switch elements, and switches a voltage level between the converter AC terminals to a positive/negative value of voltage of the smoothing capacitor, or zero voltage, through switching operations of the switch elements,the power conversion device comprising a control unit for controlling the switching operations of the switch elements of the inverter and the switch elements of the converter, whereinthe control unit controls the switch elements of the inverter and the switch elements of the converter so that charging operation and discharging operation of the DC capacitor are ...

On-board chargers (obc)

An on-board charger (OBC) may include a power factor corrector PFC comprising a three phase active front end (AFE) connected to an AC electrical grid, and a DC/DC converter receiving a regulated DC voltage from the PFC and configured to charge a high voltage battery. The OBC may be configured to extract a power value which is equal to a reference maximum power extracted from a three phase electrical grid PMAX3∅, from any type of AC electrical grid to which the OBC is connected, and may include three switches SW1, SW2 and SW3 and a diodes arm having diodes D1 and D2 connected in series between a high and low side of the AFE, whereby two switches SW1 and SW2 are arranged between the AFE and the AC electrical grid and are able to interrupt current flowing between phase arms of the three phase AFE, wherein the third switch SW3 is arranged on a line connecting the diodes arm and the AC electrical grid.

Three-phase ac to dc power converter

A three-phase alternating current (AC) to direct current (DC) power converter includes a boost power factor correction (PFC) circuit that includes a low frequency diode-based converter, and a PFC inductor and a PFC capacitor connected in series together and in parallel to a PFC output of the converter. The boost PFC circuit further includes either a high frequency PFC diode and a high frequency PFC switch or a plurality of high frequency PFC switches. A Ćuk converter includes a first Ćuk inductor and a Ćuk capacitor, a second Ćuk inductor and a high frequency Ćuk diode, and a transformer having a primary side connected in parallel to the PFC capacitor and a secondary side connected in parallel to the Ćuk capacitor.

PFC CIRCUIT

In one embodiment, a power factor correction (PFC) circuit can include: (i) a rectifier bridge and a PFC converter coupled to an input capacitor; (ii) a harmonic wave compensation circuit configured to shift a phase of a DC input voltage provided from the rectifier bridge, where the harmonic wave compensation circuit comprises a phase of about −45° when a corner frequency is about 50 Hz; and (iii) a PFC control circuit configured to control the PFC converter, where the PFC control circuit comprises a first sampling voltage, and the harmonic wave compensation circuit is configured to control a phase of the first sampling voltage to lag a phase of the DC input voltage by about 45°. 1. A power factor correction (PFC) circuit , comprising:a) a rectifier bridge and a PFC converter coupled to an input capacitor;b) a harmonic wave compensation circuit configured to shift a phase of a DC input voltage provided from said rectifier bridge, wherein said harmonic wave compensation circuit comprises a phase of about −45° when a corner frequency is about 50 Hz; andc) a PFC control circuit configured to control said PFC converter, wherein said PFC control circuit comprises a first sampling voltage, and said harmonic wave compensation circuit is configured to control a phase of said first sampling voltage to lag a phase of said DC input voltage by about 45°.2. The PFC circuit of claim 1 , wherein said harmonic wave compensation circuit comprises:a) a harmonic compensation resistor coupled to said DC input voltage and a common node; andb) a harmonic compensation capacitor coupled to said common node and ground, wherein said common node is coupled to said PFC control circuit.3. The PFC circuit of claim 1 , wherein said PFC control circuit comprises:a) a voltage sampling circuit coupled to said harmonic wave compensation circuit, and being configured to generate said first sampling voltage;b) a current sampling circuit configured to sample an output current of said PFC converter to ...

THREE-PHASE INTERLEAVE CONVERTER WITH THREE-STATE SWITCHING CELL

A three-phase interleave converter with a TSSC includes: a filter circuit, a PFC circuit, a star connection between the filter circuit and the PFC circuit, and a second capacitor ; where an output end of the filter circuit is connected to an input end of the PFC circuit by using a conducting wire; the star connection is set on the conducting wire connecting the filter circuit and the PFC circuit; one end of the star connection is connected to the conducting wire and the other end of the star connection is connected to one end of the second capacitor ; and the other end of the second capacitor is connected to an input wire. By using the foregoing solution, the number of capacitors is reduced from the original three to one. Therefore, fewer capacitors are used, and the volume is further reduced, thereby increasing the power density. 1. A three-phase interleave converter with a three-state switching cell , comprising:a filter circuit and a power factor correction circuit, wherein a conducting wire connects an output end of the filter circuit to an input end of the power factor correction circuit;a star connection between the filter circuit and the power factor correction circuit, wherein the star connection is connected to the conducting wire; anda capacitor connected at one of its ends to one end of the star connection and connected at another of its ends to an input wire.27. The three-phase interleave converter with a three-state switching cell according to claim 1 , wherein the capacitor is a second capacitor and:the filter circuit comprises first, second and third pins of an input end of the filter circuit,{'b': 1', '2', '3', '4', '5', '6', '1', '2', '3, 'nine capacitors comprising first capacitors , , , , and and the second capacitor, which includes second capacitors , and , and'}first and second common-mode inductors;wherein the first, second and third pins act as pins of the input end of the filter circuit to connect to a three-phase power supply and are ...

RECTIFIER CIRCUIT WITH CURRENT INJECTION

The present invention relates to a rectifier circuit with a three-phase rectifier arrangement () of semiconductor valves (), preferably a bridge rectifier circuit of diodes, wherein the rectifier arrangement () comprises a three-phase mains input () and a DC output (), and at least one of the three phases (U, V, W) at the mains input () is connected to a first pole connection (A) of a three-pole circuit () for diverting an injection current (i) into the three-pole circuit (). It is provided in accordance with the invention that each phase (U, V, W) can respectively be connected with a switching element (S, S, S) to the first pole connection (A) of the three-pole circuit (), and a second and third pole connection (B, C) of the three-pole circuit () is respectively connected to an output line (P,N) of the DC output () for control currents (i,i), wherein the three-pole circuit () comprises controllable semiconductor valves (S,S,S,S), preferably IGBTs, for the active control of the control currents (i,i) and/or the injection current (i), and at least one choke () is arranged on one of the output lines (P,N) at the DC output (), and a time-variable load () is provided at the DC output ().

POWER CONVERTER AND METHOD FOR OPERATING A POWER CONVERTER

A power converter includes at least three booster modules for transferring power at least from an AC input side to a DC output side. Each booster module has a galvanically separated input and output, and can be operated as a power factor correction module. The input of a first booster module is connected to the input side, and its output is connected to the output side for providing a first output current to the output side. The input of a second booster module is connected to the input side, and its output is connected to a buffer capacitor for providing a second output current to the buffer capacitor. The input of a third booster module is connected to the buffer capacitor and its output is connected to the output side for providing a third output current to the output side. 2. The power converter of claim 1 , wherein the at least three booster modules are free from a power storage element that is designed to smooth current pulses arising at twice a fundamental frequency of an AC source the power converter is designed to be connected to.3. The power converter according to claim 1 , wherein the at least three booster modules have similar claim 1 , or claim 1 , in particular claim 1 , identical parameters.4. The power converter according to claim 1 , comprising a controller configured to:control the first booster module to draw a sinusoidal current at its input;control the second booster module to draw a sinusoidal current at its input;control the third booster module to provide the third output current to complement the first output current so that the sum of the third and first output currents is at least approximately constant.5. The power converter of claim 4 , wherein the controller is configured to discharge the buffer capacitor to a voltage of less than 50% at each pulse of the third output current.6. The power converter according to claim 1 , comprising connections between the booster modules that can be switched claim 1 , resulting in different topologies ...

System and Method for Controlling Multiple IGBT Temperatures in a Power Converter of an Electrical Power System

A method for monitoring and controlling IGBT temperature in a power converter of an electrical power system includes generating a plurality of temperature signals from a plurality of switching devices via a plurality of temperature sensors. The method also includes selecting a primary switching device from the plurality of switching devices to estimate a primary temperature thereof. Further, the method includes determining the primary temperature of the primary switching device via a temperature measurement circuit communicatively coupled to the primary switching device. Moreover, the method includes comparing remaining temperature signals (or a function thereof) to the primary temperature via at least one comparator circuit. If one of the remaining temperature signals (or the function thereof) exceeds the primary temperature, the method also includes implementing a control action to address the increased temperature. 1. A method for controlling temperature of a plurality of switching devices of a power converter of an electrical power system connected to a power grid , the method comprising:generating, via a plurality of temperature sensors communicatively coupled to the plurality of switching devices, a plurality of temperature signals from the plurality of switching devices;selecting a primary switching device from the plurality of switching devices to estimate a primary temperature thereof;determining, via a temperature measurement circuit communicatively coupled to the primary switching device, the primary temperature of the primary switching device based on a primary temperature signal of the plurality of temperature signals;comparing, via at least one comparator circuit communicatively coupled to each of the plurality of temperature sensors, remaining temperature signals from the plurality of temperature signals or a function of the remaining temperature signals to the primary temperature; and,if one of the remaining temperature signals or the function of ...

High Voltage Power Converter with a Configurable Input

A high voltage power converter has first, second, and third switches for receiving an alternating-current input. A control power factor correction (PFC) rail is connected to each of the first, second, and third switches. A slave PFC rail is connected to each of the first, second, and third switches for providing a substantially identical output compared to an output of the control PFC rail. The control PFC rail output and the slave PFC rail output are each connected to an output stage and the output stage is for connection to a load.

Switch-mode ac-dc power converter for reducing common mode noise

A switch-mode AC-DC power converter includes a pair of input terminals, a pair of output terminals, and four switches coupled in a bridgeless totem-pole circuit arrangement between the pair of input terminals and the pair of output terminals. A control circuit is coupled to the four switches and configured to, during a cycle of an AC voltage input, turn on the first switch, turn off the second switch, and apply pulse-width modulation (PWM) control signals to the third and fourth switches. The control circuit is also configured to, during a zero crossing of the AC voltage input, supply a PWM control signal to the fourth switch to reduce a rate of voltage change across the second switch at the zero crossing to reduce common mode noise of the power converter.

SYSTEM TO INCREASE THE IN-LINE POWER FACTOR OF A THREE-PHASE BRUSHLESS DC MOTOR

The present invention relates to a control system and a method for raising the mains-side power factor A of three-phase fed EC motors having a dc voltage intermediate circuit () with an intermediate center tap (DCM) for generating a positive and a negative intermediate circuit potential (DC+, DC−), comprising three active bridge arms (Ia, IIa, IIIa), each of which are connected to a subordinate two-point current control (ZPR ZPR ZPR) and, in each case, via said current control to a superimposed intermediate circuit voltage control (), which controls the potential difference between the middle circuit potentials (DC+, DC−) via set point settings for the subordinate two-point current controllers (ZPR ZPR ZPR). 1. A control system for raising the mains-side power factor A of three-phase fed EC motors having a dc voltage intermediate circuit with an intermediate circuit center tap (DCM) for generating a positive and negative intermediate circuit potential (DC+ , DC−) , the control system comprising:{'b': 1', '2', '3', '1', '2', '3, 'three active bridge arms (Ia, IIa, IIIa), each of which are connected to a subordinate two-point current control (ZPR, ZPR, ZPR) and in each case via the latter to a superimposed intermediate circuit voltage control, which controls a potential difference between the intermediate circuit potentials (DC+, DC−) via set point settings for the subordinate two-point current controllers (ZPR, ZPR, ZPR), wherein each of the active bridge arms (Ia, IIa, IIIa) are formed in each case from six diodes (DN+, DN−, DF+, DF−, DM+, DM−) and an active switch (S), as well as a shunt resistor (Rs) connected in series with a switching path (D-S) of the switch (S), and two diodes (DF+, DF−) are designed as rapidly switching freewheeling diodes, two diodes (DM+, DM−) as medium-rapid midpoint diodes and two diodes (DN+, DN−) as slow mains diodes.'}2. The control system according to claim 1 , wherein each bridge arm (Ia claim 1 , IIa claim 1 , IIIa) is also ...

ADAPTIVE POWER CONVERTER TOPOLOGIES SUPPORTING ACTIVE POWER FACTOR CORRECTION (PFC)

A method includes operating a power converter in a first mode of operation, where the power converter includes multiple first switches and multiple boost diodes coupled to multiple first rails. Each first rail is also coupled to a different one of multiple boost inductors, and the power converter is coupled to multiple second rails. The power converter in the first mode converts electrical power transported between the first and second rails. The method also includes, during the first mode of operation, operating multiple second switches coupled in parallel across the boost diodes as synchronous switches. Each second switch is coupled across a different one of the boost diodes. The method further includes switching the power converter to a second mode of operation in which the first switches are deactivated and the second switches and the boost diodes operate as a full-bridge power converter. 120.-. (canceled)21. An apparatus comprising:multiple boost inductors, each boost inductor coupled to a different one of multiple first rails;multiple boost diodes, each boost diode coupled between one of the first rails and one of multiple second rails;multiple first switches coupled to the first rails between the boost inductors and the boost diodes;multiple second switches, each second switch coupled across a different one of the boost diodes; and a first mode in which (i) the first switches and the boost diodes operate as a first type of power converter that is configured to convert electrical power transported between the first and second rails and (ii) each of the second switches operates as a synchronous switch and becomes conductive synchronously with the associated boost diode; and', 'a second mode in which (i) the first switches are turned off and (ii) the second switches and the boost diodes operate as a second type of power converter that is configured to convert the electrical power transported between the first and second rails., 'a controller configured to ...

MULTI-PHASE SWITCHED-MODE POWER SUPPLIES

A multi-phase switched-mode power supply includes first and second interleaved phase circuits coupled between input and output terminals. The first phase circuit includes a first inductor coupled with a first switch, and the second phase circuit includes a second inductor coupled with a second switch. A control circuit is configured to output first and second PWM signals to the first and second switches. An on time of the second PWM signal is equal to an on time of the first PWM signal plus a fixed offset time period. The control circuit is configured to determine a period between rising edges of the first PWM signal in order to determine an off trigger PWM signal, and change the second PWM signal to a logical low value when a falling edge of the off trigger PWM signal occurs while the second PWM signal has a logical high value. 1. A multi-phase switched-mode power supply , the power supply comprising:a pair of input terminals for receiving an alternating current (AC) or direct current (DC) voltage input from an input power source;a pair of output terminals for supplying a direct current (DC) voltage output to a load;a first phase circuit coupled between the pair of input terminals and the pair of output terminals, the first phase circuit including a first inductor coupled with a first switch;a second phase circuit interleaved with the first phase circuit between the pair of input terminals and the pair of output terminals, the second phase circuit including a second inductor coupled with a second switch; anda control circuit configured to:output a first PWM signal to the first switch;output a second PWM signal to the second switch, wherein an on time of the second PWM signal is equal to an on time of the first PWM signal plus a fixed offset time period;determine a period between at least two rising edges of the first PWM signal;determine an off trigger PWM signal according to the determined period; andchange the second PWM signal to a logical low value when a ...

POWER FACTOR CORRECTION CIRCUIT AND POWER SUPPLY CIRCUIT

Embodiments of the present application provide a power factor correction circuit and a power supply circuit. The power factor correction circuit includes a main correction circuit and a switch module. The main correction circuit includes: a first correction circuit and a second correction circuit that are configured to perform power factor correction on an forward alternating current voltage, and a third correction circuit and a fourth correction circuit that are configured to perform power factor correction on an inverse alternating current voltage. The switch module includes first switch units that are connected in parallel between an input terminal of the first correction circuit and an input terminal of the third correction circuit, and second switch units that are connected in parallel between an input terminal of the second correction circuit and an input terminal of the fourth correction circuit. 1. A power factor correction circuit , comprising: a main correction circuit and a switch module , wherein:the main correction circuit comprises: a first correction circuit and a second correction circuit that are configured to perform power factor correction on an forward alternating current voltage, and a third correction circuit and a fourth correction circuit that are configured to perform power factor correction on an inverse alternating current voltage, wherein output terminals of the first correction circuit, the second correction circuit, the third correction circuit, and the fourth correction circuit are electrically connected;the switch module comprises first switch units that are connected in parallel between an input terminal of the first correction circuit and an input terminal of the third correction circuit, and second switch units that are connected in parallel between an input terminal of the second correction circuit and an input terminal of the fourth correction circuit; andthe first switch unit and the second switch unit each comprise two ...

Charging device and method of control of the same

If sensed a connector as being connected to an inlet, an ECU performs pre-charging of a capacitor. When pre-charging of the capacitor is completed, the ECU closes a relay, and controls a U-phase boost chopper circuit to boost a voltage of the capacitor. The ECU closes relays if the voltage is boosted to a second target voltage.

DELTA CONVERSION RECTIFIER

According to one aspect, embodiments of the invention provide an AC-DC rectifier comprising an input configured to receive input AC power from an AC power source having an input AC voltage waveform, an output configured to provide output DC power to a load, an active power filter coupled to the input, an inverter coupled to the input and configured to convert the input AC voltage waveform into an output AC voltage waveform at a desired magnitude, a rectifier portion coupled between the inverter and the output and configured to convert the output AC voltage waveform into the output DC power, and a controller coupled to the active power filter and the inverter and configured to operate the active power filter to provide Power Factor Correction (PFC) at the input and to operate the inverter to provide the output AC voltage waveform at the desired magnitude to the rectifier portion. 1. An AC-DC rectifier comprising:an input configured to be coupled to an AC power source and to receive input AC power from the AC power source having an input AC voltage waveform;an output configured to provide output DC power to a load;an active power filter coupled to the input;an inverter coupled to the input and configured to convert the input AC voltage waveform into an output AC voltage waveform at a desired magnitude;a rectifier portion coupled between the inverter and the output and configured to convert the output AC voltage waveform into the output DC power; anda controller coupled to the active power filter and the inverter and configured to operate the active power filter to provide Power Factor Correction (PFC) at the input and to operate the inverter to provide the output AC voltage waveform at the desired magnitude to the rectifier portion.2. The AC-DC rectifier of claim 1 , wherein the input is further configured to be coupled to a 3-phase AC power source and to receive one phase of 3-phase power provided by the 3-phase AC power source.3. The AC-DC rectifier of claim 1 , ...

Phase Angle and Voltage Balancing in a Multi-Phase System

Systems and methods for phase angle balancing and voltage balancing in multi-phase systems are described herein. The system can include a multi-phase control system coupled to a plurality of voltage regulators. The multi-phase control system can receive sense signals from the plurality of voltage regulators. The multi-phase control system can use the sense signals to determine phase angles between the multiple phases and adjust an output voltage of a phase. The multi-phase control system can also use the sense signals to determine voltage deltas between the multiple phases and adjust an output voltage of a phase. 1. A method of phase angle balancing in a multi-phase power delivery system , comprising:receiving at a multi-phase control system, a first sense signal from a first voltage regulator associated with a first phase, a second sense signal from a second voltage regulator associated with a second phase, and a third sense signal from a third voltage regulator associated with a third phase;calculating at the multi-phase control system an initial first phase angle from the first sense signal, an initial second phase angle from the second sense signal, and an initial third phase angle from the third sense signal, wherein the initial first phase angle, the initial second phase angle, and the initial third phase angle form an initial phase balance condition;determining at the multi-phase control system a largest phase angle from among the initial first phase angle, the initial second phase angle, and the initial third phase angle; andadjusting by the multi-phase control system an output voltage of a phase opposite the largest phase angle.2. The method of phase angle balancing of claim 1 , comprising:receiving at the multi-phase control system a new first sense signal from the first voltage regulator, a new second sense signal from the second voltage regulator, and a new third sense signal from the third voltage regulator;calculating at the multi-phase control system ...

Pre-distortion of sensed current in a power factor correction circuit

A method of enhancing a power factor during a half-line cycle of a power factor correction (PFC) converter includes generating an input voltage signal representative of a value of an input voltage of the PFC converter. A variable multiplication factor is adjusted to be greater than one for a first part of the half-line cycle and less than one for a second part of the half-line cycle. A pre-distortion signal is generated to be representative of the value of the input voltage of the PFC converter times the variable multiplication factor. An input current of the PFC converter is sensed. A first signal is generated in response to a sensed input current of the PFC converter multiplied by the pre-distortion signal. An on-time of a switch of the PFC converter is ended in response to the first signal.

BATTERY CHARGER

A device with power factor correction for converting three-phase alternating-current power into direct-current power includes a DC to DC power converter, a first set of three diodes, a second set of three diodes, an input capacitor connected to the power converter, an input resistor disposed between the second set of diodes and the power converter, and a differential amplifier connected to the second set of diodes, a non-inverting input connected to the power converter, a negative power voltage connected to the power converter, a positive power voltage connected to the power converter, and an output connected to the power converter driving the power converter toward the sensed current at the inverting input and the non-inverting input being proportional to the voltage across the positive power voltage and negative power voltage. 1. A device with power factor correction for converting three-phase alternating-current power into direct-current power for charging a battery , comprising:a DC to DC power converter having a positive input, negative input, a positive output and a negative output;a positive lead in electrical communication with the positive output of the power converter and connectable to the positive terminal of a battery;a negative lead in electrical communication with the negative output of the power converter and connectable to the negative terminal of the battery;a first set of three diodes, each of the first diodes having an anode and a cathode, each cathode of the first diodes in electrical communication with the positive input of the power converter, the anodes of the first diodes connectable to an AC power source in a first, second and third phase, respectively;a second set of three diodes, each of the second diodes having an anode and a cathode, each anode of the second diodes in electrical communication with the negative input of the power converter, the cathodes of second diodes connectable to the AC power source in the first, second and third ...

Dc power-supply device and refrigeration-cycle application device including the same

A DC power-supply device that suppresses an increase of a harmonic current and deterioration of a power factor without causing any imbalance among respective phase currents, in a configuration in which a three-phase alternating current is converted into a direct current and supplied to a load. The DC power-supply device includes a rectifier circuit, a reactor connected to an input side or an output side of the rectifier circuit, a first capacitor and a second capacitor serially connected between output terminals to a load, and a charging unit. During a cycle combining a charging period and a non-charging period of a pair of the first capacitor and the second capacitor, the charging unit is controlled so that a charging frequency becomes 3n times (n is a natural number) the frequency of the three-phase alternating current.

POWER SUPPLY AND METHOD FOR COMPENSATING LOW-FREQUENCY OUTPUT VOLTAGE RIPPLE THEREOF

A power supply has a power factor correction (PFC) circuit and a DC to DC conversion circuit. A DC to DC controller of the DC to DC conversion circuit acquires zero-crossing information and load information from the PFC circuit through a communication protocol, and performs a low-frequency compensation on a control command using a table-mapping means, thereby resolving the issues of higher controller complexity, changes of entire response characteristics and cost increase in conventional compensation technique. 1. A method for compensating low-frequency output voltage ripple of a power supply , wherein the power supply has a power factor correction (PFC) circuit and a DC (Direct Current) to DC conversion circuit , the DC to DC conversion circuit has a DC to DC controller performing the method , the method comprising steps of:providing a mapping table with multiple compensation signals built in the DC to DC controller;continuously acquiring zero-crossing information of an AC (Alternating Current) power from the PFC circuit;determining if a zero-crossing of the AC input power is taking place according to the zero-crossing information; andselecting a corresponding compensation signal from the mapping table to compensate a control command when the zero-crossing of the AC input power is taking place.2. The method as claimed in claim 1 , wherein the compensation signal is a part of a sinusoidal signal.3. The method as claimed in claim 2 , wherein phases of the compensated control signal and an input voltage of the DC to DC conversion circuit are reverse.4. The method as claimed in claim 1 , wherein in the step of selecting a corresponding compensation signal from the mapping table claim 1 , the DC to DC controller further acquires load information of the power supply and compensates the control command with the load information and the zero-crossing information.5. The method as claimed in claim 2 , wherein in the step of selecting a corresponding compensation signal from ...

Bootstrap pre-charge circuit in totem-pole power factor correction converter

A power factor correction converter that outputs a DC output voltage from an AC input voltage, includes two channels each including a high-side switch and a low-side switch connected in cascade between a positive output terminal and a negative output terminal of the power factor correction converter and with a node between the high-side switch and the low-side switch; an inductor connected to a first terminal of the AC input voltage and the first node; a gate driver connected to the second high-side switch and the second low-side switch; a bootstrap circuit connected to the second node and the gate driver; wherein the second node is connected to a second terminal of the AC input voltage; and the bootstrap circuit is pre-charged at beginnings of negative half-cycles of the AC input voltage.

Reconfigurable Bidirectional DC-AC Power Inverter for Worldwide Voltages

Systems and method are provided for using a single reconfigurable alternating current (AC)/direct current (DC) voltage converter to support a three phase mode and a single phase mode for multiple worldwide voltages. In an embodiment, one leg of a DC/DC converter can be repurposed for AC operation in single-phase mode. This repurposing provides two parallel bridges for each AC connection and will roughly double the available AC current, leading to a more efficient voltage converter that better uses components of the voltage converter. 1. A voltage converter , comprising:a direct current (DC) to DC stage, comprising a first plurality of phase legs including a first phase leg; and a second phase leg, wherein the first phase leg is configured to be coupled to the second phase leg such that the coupling between the first and second phase legs forms a first parallel bridge enabling the first phase leg to be configured to support operation in a single phase AC mode,', 'a third phase leg, and', 'a fourth phase leg, coupled to the third phase leg, wherein the coupling between the third and fourth phase legs forms a second parallel bridge configured to support operation in the single phase AC mode., 'a DC to alternating current (AC) stage, comprising a second plurality of phase legs, including;'}2. The voltage converter of claim 1 , wherein the DC to DC stage further comprises an inductor coupled to the first phase leg claim 1 , and wherein the coupling between the first and second phase legs enables the inductor to support operation in the single phase AC mode.3. (canceled)4. The voltage converter of claim 1 , further comprising:a first switch configured to couple the first phase leg to the second phase leg or to disconnect the first phase leg from the DC to DC stage; anda second switch configured to couple the second phase leg to an AC grid or to the first phase leg and the AC grid.520-. (canceled)21. A voltage converter claim 1 , comprising: a first plurality of phase legs ...

Power conversion device, motor drive control apparatus including the power conversion device, air blower and compressor including the motor drive control apparatus, and air conditioner including the air blower or the compressor

A power conversion device includes a switching control unit that controls respective switching elements constituting a plurality of chopper circuits, a rectified-voltage detection unit, a bus-bar voltage detection unit, and a bus-bar current detection unit. The switching control unit includes an on-duty calculation unit that calculates a reference on-duty of respective drive pulses with respect to the switching elements based on a bus-bar voltage and a bus-bar current, an on-duty correction unit that corrects the reference on-duty to output on-duties of the respective drive pulses based on the bus-bar current, so that change amounts of respective reactor currents become substantially the same, and a drive-pulse generation unit that generates the respective drive pulses, based on the respective on-duties.

Power conversion module, vehicle-mounted charger, and electric vehicle

A power conversion module, a vehicle-mounted charger, and an electric vehicle may be used in the field of new energy vehicles. The power conversion module includes a power factor correction PFC module and a first direct current-direct current DC-DC converter. A first primary circuit of the first DC-DC converter has a first bridge arm, a second bridge arm, a third bridge arm, and a fourth bridge arm. A first switch is disposed between the first bridge arm and an inductor at an interface of the PFC module, and a second switch is disposed between the third bridge arm and another interface of the PFC module. When the first switch and the second switch are turned on, a secondary circuit of the first DC-DC converter may implement a function of a primary circuit of a second DC-DC converter; the second bridge arm and the fourth bridge arm may implement a function of a secondary circuit of the second DC-DC converter; and the first bridge arm, the third bridge arm, the inductor of the PFC module, and a capacitor of the PFC module may form an inverter module, so as to implement an inverse discharging function.

POWER CONVERSION DEVICE

A power conversion device converts three-phase AC power into DC power by two-arm PWM modulation control and includes a main circuit that is constituted by a plurality of switching elements that are bridge-connected therein; a voltage-command generation unit that generates a voltage command value for the main circuit; a current detection unit that detects at least one of output currents of the main circuit; a power-factor calculation unit that calculates a power factor on the basis of the output current and the voltage command value; a carrier-signal generation unit that generates a carrier signal of a frequency corresponding to the power factor; and a PWM-signal generation unit that compares the voltage command value and the carrier signal to generate a PWM signal that executes switching control on the switching elements. 1. A power conversion device that converts three-phase AC power into DC power by two-arm PWM modulation control , the power conversion device comprising:a main circuit that is constituted by a plurality of switching elements that are bridge-connected therein;a voltage-command generation unit that generates a voltage command value for the main circuit;a current detection unit that detects at least one of input currents of the main circuit;a power-factor calculation unit that calculates a power factor on the basis of the input current and the voltage command value;a carrier-signal generation unit that generates a carrier signal of a frequency corresponding to the power factor; anda PWM-signal generation unit that compares the voltage command value and the carrier signal so as to generate a PWM signal that executes switching control on the switching elements.2. A power conversion device that converts three-phase AC power into DC power by two-arm PWM modulation control , the power conversion device comprising:a main circuit that is constituted by a plurality of switching elements that are bridge-connected therein;a voltage-command generation unit that ...

Method and System for Controlling On-Board Battery Charger of Electric Vehicle to Accommodate Transients in Supply Voltage

An on-board battery charger (OBC) of an electric vehicle (EV) receives AC electrical power from a charge station and outputs a DC output current for charging a traction battery of the EV. In response to transients in the AC electrical power while the OBC is receiving the AC electrical power from the charge station and outputting the DC output current, a controller controls the OBC to (i) stop processing the AC electrical power from the charge station and reduce the DC output current and (ii) after the transients have passed, resume processing the AC electrical power from the charge station and increase the DC output current. For instance, at a zero-crossing event of the AC electrical power after the transients have passed, the OBC is controlled to resume processing the AC electrical power from the charge station and increase the DC output current. 1. A system for charging a traction battery of an electric vehicle , comprising:an on-board battery charger (OBC) configured to receive AC electrical power from a charge station and to output a DC output current for charging the traction battery; anda controller configured to, in response to transients in the AC electrical power while the OBC is receiving the AC electrical power from the charge station and outputting the DC output current, control the OBC to (i) stop processing the AC electrical power from the charge station and reduce the DC output current and (ii) after the transients have passed, resume processing the AC electrical power from the charge station and increase the DC output current.2. The system of wherein:the controller is further configured to control the OBC at a zero-crossing event of the AC electrical power after the transients have passed to resume processing the AC electrical power from the charge station and increase the DC output current.3. The system of wherein:the zero-crossing event of the AC electrical power is the zero-crossing event of the AC electrical power occurring immediately after the ...

THREE-PHASE CURRENT SOURCE RECTIFIER FOR POWER SUPPLIES

A three-phase current source rectifier (CSR) with three AC inputs may include a controller, a free-wheeling diode with a cathode connected to a positive line and an anode connected to a negative line, three pairs of switches connected in parallel between the positive line and the negative line, and six pairs of diodes, each pair of the diodes connected in series. Each two pairs of the diodes may be connected in parallel with each other and in series with a respective pair of switches. Each AC input may be connected to between each of two pairs of the diodes. 1. A three-phase current source rectifier (CSR) with three AC inputs , comprising:a free-wheeling diode with a cathode connected to a positive line and an anode connected to a negative line;three pairs of switches connected in parallel between the positive line and the negative line; andsix pairs of diodes, each pair of the diodes connected in series, and each two pairs of the diodes connected in parallel with each other and in series with a respective pair of switches; anda controller to control operation of the three pairs of switches.2. The rectifier of claim 1 , whereina first pair of the diodes and a second pair of the diodes are connected in parallel with each other and in series between a first pair of switches,a third pair of the diodes and a fourth pair of the diodes are connected in parallel with each other and in series between a second pair of switches,a fifth pair of the diodes and a sixth pair of the diodes are connected in parallel with each other and in series between a third pair of switches,a first AC input of the three AC inputs is connected between the first pair of the diodes and between the sixth pair of the diodes,a second AC input of the three AC inputs is connected between the second pair of the diodes and between the third pair of the diodes, anda third AC input of the three AC inputs is connected between the fourth pair of the diodes and between the fifth pair of the diodes.3. The ...

Power conversion device

Even when one power conversion device among a plurality of power conversion devices connected in parallel experiences a short circuit, the other power conversion devices having experienced no short circuit can be promptly restarted. Each power conversion device includes: a short circuit occurrence determination unit configured to determine, on the basis of a current value at an output terminal, whether or not a short circuit has occurred; a short circuit elimination determination unit configured to determine, on the basis of a current value and a voltage value at the output terminal, whether or not the short circuit has been eliminated; and a current interruption unit configured to, on the basis of determination by the short circuit occurrence determination unit and determination by the short circuit elimination determination unit, interrupt current that flows from a power conversion unit to the output terminal or cancel the interruption.

Device for efficient dc link processing independent of grid type

The disclosure relates to the operation and a circuit arrangement for a network connection variable with regard to the input voltage (1-phase/3-phase), which is connected using a centre tap (M) between the capacitors (C) via a connecting line to a neutral conductor (N) of an input AC voltage source.

Power factor correction sub-system for multi-phase power delivery

Systems and methods are disclosed for providing power factor correction (“PFC”) for multi-phase power delivery. A PFC sub-system can include multiple active PFC modules and multiple isolated DC-to-DC converters. Each active PFC module can increase a respective power factor associated with a respective phase of the multi-phase power system. Each DC-to-DC converter can be electrically connected to a respective active PFC module. Each isolated DC-to-DC converter can modify a respective DC voltage level for a respective DC voltage received from a respective active PFC module. Outputs of the isolated DC-to-DC converters are electrically connectable for providing a combined voltage or combined current to a load device. The combined voltage or combined current corresponds to the voltages received by the DC-to-DC converters from the active PFC modules.

Electrical converter

A converter for conversion between three-phase AC and a DC signal may include three phase terminals, a first and second DC terminal, conversion circuitry for conversion between three phase voltages of the three-phase AC signal and a first and second intermediate voltage at first and second intermediate nodes, and first and second buck circuits. The buck circuits each have three devices that are actively switchable for connecting switch-node terminals to any one of the three phase terminals. The first buck circuit includes a second switching device connected between the first intermediate node and the first switch-node terminal, and a first filter inductor connected between the first switch-node terminal and the first DC terminal. The second buck circuit has another second switching device connected between the second intermediate node and the second switch-node terminal, and a second filter inductor connected between the second switch-node terminal and the second DC terminal.

ACTIVE POWER FACTOR CORRECTION FOR AIRCRAFT POWER SYSTEM HARMONIC MITIGATION

Active power factor correction can be used to reduce input harmonics in an aircraft power distribution system. In an embodiment, one or more power factor correction (PFC) units can be placed in a power distribution system to profile an input signal. Each PFC unit can include a converter, such as an AC-DC converter, and can be placed in the power system bus on the input side of the load. In an embodiment, a PFC unit can include a boost rectifier topology with active power factor correction for harmonics elimination. 1. A power factor correction unit , comprising:an alternating current (AC) input, configured to receive AC electricity;a rectifier having an input electrically coupled with the AC input and providing a direct current (DC) output;a power converter having an input electrically coupled with the DC output of the rectifier; anda power factor control circuit configured to control the power factor of said power factor correction unit, the power factor control circuit configured to output a control signal for the power converter, the control signal produced according to a harmonic of the DC output of the rectifier.2. The power factor correction unit of claim 1 , wherein the harmonic comprises the sixth harmonic of the DC output of the rectifier.3. The power converter of claim 1 , wherein the power converter is a DC-DC converter.4. The power factor correction unit of claim 3 , wherein the power converter is a boost converter.5. The power factor correction unit of claim 4 , wherein the power factor control circuit is configured to generate the control signal to operate the boost converter in a discontinuous conduction mode.6. The power factor correction unit of claim 1 , wherein the control signal comprises a pulse-width modulation control signal.7. The power factor correction unit of claim 1 , wherein the rectifier comprises a three-phase bridge rectifier.8. The power factor correction unit of claim 1 , wherein the power factor control circuit is configured to ...

MODULAR POWER CONVERSION SYSTEM AND METHOD

A method for converting electrical power includes providing a modular power converter having a mode control module and a plurality of autonomously operating power conversion modules operatively connected to a first power bus; selecting, by the mode control module, individual modes of operation for the plurality of power conversion modules to meet a power conversion requirement; receiving electrical power of a first power type from the first power bus by at least one of the power conversion modules; and converting the received electrical power into electrical power of a second power type by the at least one power conversion module. 1. A method for converting electrical power , said method comprising:providing a modular power converter comprising a mode control module and a plurality of autonomously operating power conversion modules operatively connected to a first power bus;selecting, by said mode control module, individual modes of operation for said plurality of power conversion modules to meet a power conversion requirement;receiving electrical power of a first power type from said first power bus by at least one of said power conversion modules; andconverting the received electrical power into electrical power of a second power type by said at least one power conversion module.2. The method of claim 1 , wherein said plurality of power conversion modules comprise substantially equal volts-amperes-reactive conversion capacities claim 1 , and wherein the selecting of individual modes of operation comprises selecting said power conversion modules to operate in either a standby mode or one of an inductive or a capacitive mode so that reactive power is either absorbed or supplied to said first power bus.3. The method of claim 2 , wherein said power conversion modules operating in one of the inductive or capacitive mode all convert substantially the same volts-amperes-reactive (VAr) amounts.4. The method of claim 1 , further comprising supplying the power of said ...

METHOD AND SYSTEM FOR POWER MANAGEMENT USING A POWER CONVERTER IN TRANSPORT

Methods and systems for power management using a power converter in transport are provided. In one embodiment, the method includes monitoring a varying AC input to the power converter. The method also includes calculating a power factor adjustment based on the monitored varying AC input. Also, the method includes a power converter controller adjusting the power converter based on the calculated power factor adjustment to cause the power converter to supply a reactive current to a varying AC load. 1. A method for power management using a power converter in transport , the method comprising:monitoring a varying AC input to the power converter;calculating a power factor adjustment based on the monitored varying AC input; anda power converter controller adjusting the power converter based on the calculated power factor adjustment to cause the power converter to supply a reactive current to a varying AC load.2. The method of claim 1 , wherein adjusting the power converter based on the calculated power factor adjustment includes changing an energy storage within a boost inductance circuit of the power converter.3. The method of claim 1 , wherein adjusting the power converter based on the calculated power factor adjustment includes changing a capacitance value of a DC link capacitance circuit of the power converter.4. The method of claim 1 , wherein adjusting the power converter based on the calculated power factor adjustment includes switching one or more of a plurality of transistors of an inverter of the power converter.5. The method of claim 1 , wherein adjusting the power converter based on the calculated power factor adjustment includes adjusting the power factor closer to a unity power factor where a current of the varying AC power signal and a voltage of the varying AC power signal are in phase.6. The method of claim 1 , wherein the varying AC input is a varying three phase AC current signal inputted to the power converter.7. The method of claim 1 , wherein the ...

Rectifier with improved power factor

A rectifier circuit being arranged for rectifying electrical power, comprising a three phase power input, a magnetic splitter circuit being arranged for receiving the three phase power input and splitting the three phase power into a first three phase system and a second three phase system, the first three phase system having signals lagging signals of the second three phase system, a twelve pulse rectifier with six input terminal to connect the first and the second three phase system, and to generate a rectified electrical power at a power output, a three phase inductance being connected in series with the three phase power input and the magnetic splitter circuit, and a plurality of power factor correction (PFC) capacitors, each comprising first and second terminals, said first terminals being connected to respective input terminals of the twelve pulse rectifier, and the second terminals being connected to at least one common electrical point.

TECHNOLOGIES FOR CONTROLLING AC-TO-DC CONVERTERS

Technologies for controlling AC-to-DC converters are disclosed. In one illustrative embodiment, a controller of an AC-to-DC converter measures two voltage levels of a split voltage bus of a power factor correction (PFC) circuit. The controller controls current drawn from the positive and negative terminals of the PFC circuit by a DC-to-DC converter. By controlling the current drawn from the two terminals, the controller can control the voltages on the terminals to be equal (but opposite). 1. An alternating current (AC) to direct current (DC) converter comprising:a power factor correction (PFC) circuit comprising a positive DC voltage terminal, a center DC voltage terminal, and a negative DC voltage terminal;a DC-to-DC converter; and determine an indication of a voltage difference between (i) a voltage of the positive DC voltage terminal relative to the center DC voltage terminal and (ii) a voltage of the center DC voltage terminal relative to the negative DC voltage terminal;', 'determine, based on the indication of the voltage difference, a control signal to control a current draw from the positive DC voltage terminal or the negative DC voltage terminal by the DC-to-DC converter; and', 'provide the control signal to the DC-to-DC converter to control the current draw from the positive DC voltage terminal or the negative DC voltage terminal by the DC-to-DC converter., 'a controller configured to2. The AC-to-DC converter of claim 1 , wherein to determine the control signal comprises to (i) determine claim 1 , based on the indication of the voltage difference claim 1 , a first control signal to control a current draw from the positive DC voltage terminal and (ii) determine claim 1 , based on the indication of the voltage difference claim 1 , a second control signal to control a current draw from the negative DC voltage terminal claim 1 , and wherein to provide the control signal comprises to (i) provide the first control signal to the DC-to-DC converter to control the ...

Hybrid transformation system based on three-phase pwm rectifier and multi-unit uncontrolled rectifier and control method thereof

The present invention discloses a hybrid transformation system based on three-phase voltage type PWM rectifier and multi-unit uncontrolled rectifier. The hybrid transformation system mainly consists of a three-phase reactor (L), a three-phase voltage type PWM rectifier module, an N-unit three-phase uncontrolled rectifier bridge module group, capacitors (C 0 -CN) and a DSP control circuit. An input end of the three-phase voltage type PWM rectifier module is in parallel connection with an input end of each three-phase uncontrolled rectifier bridge module. The three-phase voltage type PWM rectifier module may work in to situations, with load or without load, and the three-phase voltage type PWM rectifier module just does reactive power compensation when working without load. All modules of the three-phase uncontrolled rectifier bridge module group may work in to situations, with loads independently or all the outputs are in parallel connection and with a same load. The hybrid rectifier system has advantages such as unity input power factor, grid side current low harmonic, high power output, low cost, easy control, and etc.

UNIVERSAL VOLTAGE AND PHASE INPUT POWER SUPPLY FOR ELECTRICAL MOTORS

A power supply generates power factor corrected power from AC power having one or more phases and different levels of output voltages. The power supply includes a power factor correction circuit that charges a capacitor through at least one inductor. Each inductor of the at least one inductor is independently connected to the capacitor to charge the capacitor with rectified power. 1. A power supply for electrical equipment comprising:at least three input connections, each input connection is configured to receive a conductor from an AC power source;a rectifier electrically connected to the at least three input connections, the rectifier having a plurality of diodes that are configured to rectify AC power having one or more phases;a capacitor electrically connected to the rectifier; and at least one inductor;', 'at least one diode that is different than the plurality of diodes of the rectifier, each at least one inductor being electrically connected to the capacitor through one of the at least one diode in a one-to-one correspondence; and', 'a controller, the controller being configured to electrically connect each inductor of the at least one inductor to electrical ground independently of the other inductors of the at least one inductor and to electrically connect each inductor of the at least one inductor to the capacitor independently of the other inductors of the at least one inductor to charge the capacitor through each of the inductors of the at least one inductor and each of the diodes of the at least one diode in the power factor control and boost circuit independently with current from the diodes of the at least one diode in the power factor control and boost circuit., 'a power factor control and boost circuit electrically connected to the rectifier and to the capacitor, the power factor control and boost circuit having2. The power supply of claim 1 , the at least one inductor further comprising three inductors and the at least one diode further comprising ...

POWER FACTOR IMPROVEMENT DEVICE

It is an object of the present invention to provide a power factor correction device for three-phase AC-DC conversion which enables effective power factor correction and stable power conversion with a simple construction and control system. 1. A power factor correction device comprising:(a) first, second, and third input terminals to which three-phase alternating current (AC) is inputted;(b) a positive electrode terminal and a negative electrode terminal;(c) first, second, and third transformers having primary coils with first ends respectively connected to the first, second, and third input terminals and secondary coils with first ends respectively connected to the negative electrode terminal;(d) one or more switching elements having control ends controlled so as to selectively open and close a current path between second ends of the primary coils of the first, second, and third transformers and a common potential terminal on a side of the primary coils;(e) first, second, and third rectifying devices respectively disposed between second ends of said secondary coils of the first, second, and third transformers and the positive electrode terminal so as to pass current flow into the positive electrode terminal when the second ends of the secondary coils have forward-biased potentials and block current flow into the positive electrode terminal when the second ends of the secondary coils have reverse-biased potentials; and(f) a smoothing condenser disposed between the positive electrode terminal and the negative electrode terminal; wherein(g) the control ends of the one or more switching elements are controlled by a single control signal having a constant duty ratio.2. The power factor correction device of claim 1 , wherein the one or more switching elements comprise first claim 1 , second claim 1 , and third switching elements respectively disposed between the second ends of the primary coils of the first claim 1 , second claim 1 , and third transformers and a common ...

PFC CIRCUITS WITH VERY LOW THD

A boost chopper circuit is described that an alternating current (AC) power source; at least one inductor connected to said AC power source; a rectifier connected to said inductor and AC power source; at least one switch shorting our said rectifier; a series circuit connected in parallel with said switch of at least one diode and a capacitor; and a load connected in parallel with said capacitor. A control technique is employed that includes turning on and off the switch in order to keep the average current per pulse cycle proportional to the AC input voltage during the same pulse cycle. 1. A boost chopper circuit comprising:an alternating current (AC) power source;at least one inductor connected to said AC power source;a rectifier connected to said inductor and AC power source;at least one switch shorting our said rectifier;a series circuit connected in parallel with said switch of at least one diode and a capacitor; and 'wherein a control technique is employed of turning on and off said switch in order to keep the average current per pulse cycle proportional to the AC input voltage during the same pulse cycle.', 'a load connected in parallel with said capacitor,'}2. A circuit as claimed in wherein said control technique comprises:{'br': None, 'i': t', '=t', 'V', '/V, 'sub': 3', '1', 'AB', 'O, 'sup': '1/2', '*(1−())'}3. A circuit as claimed in wherein said control technique comprises:{'br': None, 'i': t', '=t', 'V', '/V, 'sub': 3', '1', 'AB', 'O, '*(1−0.57())'}4. A circuit as claimed in wherein the 0.57 factor can be varied to minimize the THD.5. A boost chopper circuit comprising:an alternating current (AC) power source;a rectifier connected to said AC power source;an inductor connected to the output of said rectifier;a switch connected to said inductor and the other output of said rectifier;a series circuit connected in parallel with said switch of at least one diode and a capacitor; and 'wherein a control technique is employed of turning on and off said switch in ...

MULTILEVEL CONVERTER FOR POWER FACTOR CORRECTION AND ASSOCIATED OPERATING METHOD

A method operates a multilevel converter for power factor correction of a polyphase mains voltage. Each phase of the polyphase main has an associated phase module with a plurality of sub modules which are connected in series and each have an electrical energy store. Each sub module can be connected to the phase of the mains voltage or disconnected there from by an electronic switch. A circuit breaker is provided for disconnecting the converter from the mains voltage. The converter has a regulation system by which the voltages of the phase modules are balanced when the circuit breaker is open. 18-. (canceled)9. A method for operating a multilevel power converter for reactive power compensation of a multiphase grid voltage , the multilevel power converter containing phase modules each having multiple sub-modules connected in series and each of the sub-modules having an electric energy store , the phase modules each being associated with a phase , each of the sub-modules being connected to the phase of the multiphase grid voltage or being disconnected from the phase with an aid of an electronic switch , which comprises the steps of:disconnecting the multilevel power converter from the multiphase grid voltage via a circuit breaker; andproviding a controller via which voltages of the phase modules are balanced while the circuit breaker is open.10. The method according to claim 9 , which further comprises connecting the phase modules in a delta configuration and are supplied with the voltages while the circuit breaker is open for balancing energy in a targeted manner via the controller.11. The method according to claim 9 , wherein that a balancing of the voltages of the phase modules comprises the following steps:calculating energy stored in electrical energy stores of the phase modules;calculating a control error of individual ones of the electrical energy stores;routing to the controller;generating a sinusoidal AC voltage in a function generator;associating output ...

VARIABLE SPEED DRIVE WITH ACTIVE CONVERTER

A system or method for a VSD with an active converter including a controller, an inductor, an active converter, a DC link, and an inverter. The active converter is controlled to receive an input AC voltage and output a boosted DC voltage to a DC link, up to 850 VDC, the active converter using only low voltage semiconductor switches to provide the 850 VDC DC link voltage. The controller is configured to operate with a reactive input current magnitude equal to zero at a predetermined system load, and at system loads less than the predetermined system load, to introduce a reactive input current that results in a converter voltage having a magnitude less than the input voltage, wherein the vector sum of the input voltage and an inductor voltage is equal to the converter voltage. 1. A variable speed drive , comprising:an active converter configured to convert input alternating current electrical power received from an alternating current power source into first direct current electrical power that comprises a direct current voltage; store electrical energy based at least in part on the first direct current electrical power received from the active converter; and', 'output second direct current electrical power by filtering the direct current voltage using the electrical energy stored by the DC link;, 'a direct current (DC) link electrically coupled to the active converter, wherein the DC link is configured toan inverter electrically coupled to the DC link, wherein the inverter is configured to convert the second direct current electrical power received from the DC link into output alternating current electrical power to be supplied to an electrical load; and determine a DC link voltage present on the DC link; and', maintain the DC link voltage below a DC link voltage threshold; and', 'introduce a non-zero reactive current when magnitude of a ripple on the DC link voltage exceeds a ripple threshold., 'output control signals that control operation of the variable speed ...

Ac-dc converter

A switched-mode AC-DC converter intended to deliver a DC output voltage V out between a first output terminal and a second output terminal, the converter comprising at least one conversion chain intended to convert an AC input voltage applied between an input terminal and a neutral point, the conversion chain comprising: a first output capacitor comprising one terminal connected to the first output terminal and another terminal connected to a second terminal of the input switch, a second output capacitor with the same capacitance as the first output capacitor and with a higher capacitance than the capacitance of the link capacitor, the second output capacitor comprising one terminal connected to the second output terminal and another terminal connected to the second terminal of the input switch.

Voltage-Regulated Power Converter Module

A voltage-regulated power converter module includes an electrical charge storage device and a semiconductor switch connected thereto and having a collector, a gate and an emitter, in which the collector-emitter path of the semiconductor switch is switched into a current path between first and second alternating-current terminals of the power converter module. The alternating-current terminals can be interconnected through a bypass switch. The voltage-regulated power converter module is intended to minimize the occurrence of damage in the event of a fault, and allow the multilevel power converter to continue operating without possibly having to use an extremely fast bypass switch for this purpose. To this end, the collector and the gate of the semiconductor switch are interconnected through a circuit configuration, which is configured in such a way that it becomes conductive above a predefined voltage threshold. A power converter is also provided. 113-. (canceled)14. A voltage-regulated power converter module , comprising:first and second alternating-current terminals defining a current path therebetween;a bypass switch configured to interconnect said alternating-current terminals;an electrical charge storage device;a semiconductor switch connected to said electrical charge storage device, said semiconductor switch including a collector, a gate, an emitter and a collector-emitter path switched into said current path between said first and second alternating-current terminals; anda circuit configuration interconnecting said collector and said gate of said semiconductor switch, said circuit configuration being configured to become conductive above a predefined voltage threshold.15. The voltage-regulated power converter module according to claim 14 , wherein the voltage-regulated power converter module is a half-bridge module.16. The voltage-regulated power converter module according to claim 14 , wherein:the voltage-regulated power converter module is a full-bridge ...

METHOD FOR CONTROLLING A THREE-PHASE VIENNA RECTIFIER

A method for controlling a three-phase Vienna rectifier, including a plurality of controlled power switches, each associated with an electrical phase; the method including: transforming three provided reference line voltages into three phase voltages; calculating a homopolar component to be injected according to the sign of the phase voltage values and to the average value of the phase currents of the three-phase Vienna rectifier; calculating “modulating” values for each phase of the three-phase Vienna rectifier according to the calculated homopolar component to be injected and the three phase voltages; and generating six signals for switching the controlled power switches, according to the sign of the phase currents of the three-phase Vienna rectifier and the “modulating” values that were calculated 17-. (canceled)8. A method for controlling a three-phase Vienna rectifier , comprising a plurality of controlled power switches (Sa , Sb , Sc) that are each associated with one electrical phase; the method comprising:transforming three supplied setpoint phase-phase voltages (U*ab, U*bc, U*ac) into three phase-neutral voltages (v*a, v*b, v*c);calculating a homopolar component (f(3 wt)) to be injected according to the values and the signs of the phase-neutral voltages (v*a, v*b, v*c) and the average values of the phase currents (ia, ib, ic) of the three-phase Vienna rectifier;calculating a modulant value (mod*a, mod*b, mod*c) for each phase of the three-phase Vienna rectifier according to the calculated homopolar component (f(3 wt)) to be injected and the three phase-neutral voltages (v*a, v*b, v*c); andgenerating six signals for switching the controlled power switches (Sa, Sb, Sc) according to the sign of the phase currents (ia, ib, ic) of the three-phase Vienna rectifier and the calculated “modulant” values (mod*a, mod*b, mod*c).10. The method as claimed in claim 8 , wherein each modulant value (mod*a claim 8 , mod*b claim 8 , mod*c) is calculated by adding the ...

SMART CAPACITOR

Methods and systems include identifying an abnormal condition in a PFC circuit comprising an input configured to be coupled to a 3-phase power source and to receive input 3-phase power from the 3-phase power source, a bus having a plurality of bus lines, each bus line configured to be coupled to the input and to carry one phase of the input 3-phase power, a PFC leg including a contactor configured to selectively couple a capacitor bank included in the PFC leg to the bus. In response to identifying the abnormal condition, the contactor is controlled to decouple the capacitor bank from the bus, and after a reset button has been activated, the contactor is recoupled to the capacitor bank to resume operating the PFC leg to provide power factor correction to the input 3-phase power. 1. A capacitor system comprising: at least one capacitor configured to be coupled to at least one bus line;', 'at least one sensor configured to measure at least one electrical parameter of the at least one capacitor; and', 'a monitoring device configured to monitor the at least one electrical parameter, identify one or more conditions of the at least one capacitor based on the at least one electrical parameter and operate a contactor to decouple the at least one capacitor from the at least one bus line in response to identifying the one or more conditions., 'a housing including2. The capacitor system of claim 1 , wherein the at least one sensor includes a voltage sensor coupled to the at least capacitor and the at least one parameter includes a voltage across the at least one capacitor.3. The capacitor system of claim 2 , wherein the one or more conditions include the voltage exceeding a predetermined value for one of at least a number of samples and at least a period of time.4. The capacitor system of claim 1 , wherein the at least one sensor includes a current sensor coupled to the at least one capacitor and configured to measure current provided to the at least one capacitor.5. The ...

SEMICONDUCTOR DEVICE AND POWER CONVERSION DEVICE

To solve the problem of multi-pulse control in which the load of the control software is increased and further switching/timing adjustment is required, a semiconductor device includes a control unit including a CPU and a memory, a PWM output circuit for controlling the driver IC to drive the power semiconductor device, a current detection circuit for detecting the motor current, and an angle detection circuit for detecting the angle of the motor. The PWM output circuit includes a square wave generator circuit to generate a square wave based on the angle of the angle detection circuit as well as the base square wave information. 1. A semiconductor device comprising:a control circuit including a CPU and a memory;a PWM output circuit configured to control a driver IC that drives a power semiconductor device;a current detection circuit configured to detect the motor current; andan angle detection circuit configured to detect the angle of the motor,wherein the PMW output circuit includes a square wave generator circuit, andwherein the square wave generator circuit generates a square wave based on the angle information of the angle detection circuit and a base square wave information.2. The semiconductor device according to claim 1 ,wherein the square wave generator circuit comprises:a compare circuit that compares the angle information from the angle detection circuit with the angle information within the register that is set based on the base square wave information, anda waveform synthesis circuit that raises or drops the square wave pulse based on the comparison result of the compare circuit.3. The semiconductor device according to claim 2 ,wherein the memory stores the base square wave information.4. The semiconductor device according to claim 3 ,wherein the control circuit generates the base square wave information based on the deviation between the theoretical sine wave and the motor current measurement waveform.5. The semiconductor device according to claim 4 , ...

DETECTION OF SHOOT-THROUGH IN POWER CONVERTERS

According to one aspect, an uninterruptible power supply system is provided including an input configured to receive input power, an interface configured to be coupled to a backup power supply and to receive backup power from the backup power supply, an output configured to provide output power derived from at least one of the input power and the backup power to a load, a power converter coupled to the input, a capacitor, and a shoot-through detector coupled to the capacitor. The shoot-through detector is configured to obtain a first voltage value indicative of a first voltage across the capacitor, obtain a second voltage value indicative of a second voltage across the capacitor, compare the first voltage value to the second voltage value, determine, based on the comparison, that the capacitor is experiencing a shoot-through condition, and provide an output signal indicative of the shoot-through condition. 1. An Uninterruptible Power Supply (UPS) system comprising:an input configured to receive input power;an interface configured to be coupled to a backup power supply and to receive backup power from the backup power supply;an output configured to provide output power derived from at least one of the input power and the backup power to a load;a power converter coupled to the input;at least one capacitor; and obtain a first voltage value indicative of a first voltage across the at least one capacitor;', 'obtain a second voltage value indicative of a second voltage across the at least one capacitor;', 'compare the first voltage value to the second voltage value;', 'determine, based on the comparison, that the at least one capacitor is experiencing a shoot-through condition; and', 'provide an output signal indicative of the shoot-through condition., 'a shoot-through detector coupled to the at least one capacitor and being configured to2. The UPS system of claim 1 , wherein the shoot-through detector comprises a delay circuit configured to delay the first voltage value ...

STORAGE-BATTERY CHARGING DEVICE FOR A MOTOR VEHICLE, METHOD FOR OPERATING AN ON-BOARD STORAGE-BATTERY CHARGING DEVICE, HIGH-VOLTAGE VEHICLE ELECTRICAL SYSTEM AND USE OF A STORAGE-BATTERY CHARGING DEVICE

A storage-battery charging device for a motor vehicle is configured to be arranged in the motor vehicle. The device includes a first stage with a power correction filter, and a second stage with an inverter. The first stage is electrically connected to the second stage by way of an intermediate node, the intermediate node being directly electrically connected to a feed-in connection point for direct voltage. The feed-in connection point is designed for direct electrical coupling to a high-voltage vehicle electrical system of the motor vehicle. 115-. (canceled)16. A storage-battery charging device for arrangement in a motor vehicle , the storage-battery charging device comprising:a first stage having a power factor correction filter;a second stage having an inverter;an intermediate node electrically connecting said first stage with said second stage; anda supply connection for DC voltage directly electrically connected to said intermediate node and configured for direct electrical coupling to a high-voltage vehicle electrical system of the motor vehicle.17. The storage-battery charging device according to claim 16 , wherein said intermediate node is electrically connected directly to said inverter of said second stage.18. The storage-battery charging device according to claim 16 , wherein said second stage is electrically connected to an output connection on a side of said second stage that is remote from said intermediate node claim 16 , wherein said second stage is configured to provide a second DC voltage claim 16 , different from a first DC voltage claim 16 , while said intermediate node is coupled to the first DC voltage.19. The storage-battery charging device according to claim 16 , wherein said first stage has a rectifier connected upstream of said power factor correction filter with reference to said intermediate node.20. The storage-battery charging device according to claim 16 , wherein said second stage has a transformer connected downstream of said ...

METHOD AND APPARATUS FOR REGULATED AC-TO-DC CONVERSION WITH HIGH POWER FACTOR AND LOW HARMONIC DISTORTIONS

The present invention relates to methods and corresponding apparatus for AC to DC conversion, including 3-phase AC to DC conversion, with high power quality, for example, high power factor and low harmonic distortions. The invention further relates to methods and corresponding apparatus for regulation and control of said AC to DC conversion. 1. A controller for non-isolated switching rectifier configured to provide DC electrical power to a load characterized by a load current , wherein said non-isolated switching rectifier is characterized by a pair of AC line voltages , a DC output voltage , a DC reference voltage , and a switching frequency , wherein said non-isolated switching rectifier comprises a means to obtain a full-wave rectified difference between said pair of AC line voltages , a rectifier inductor associated with said pair of AC line voltages , an output storage capacitor connected in parallel to said load , and a rectifier switch controlled by a switch control signal , and wherein said controller provides said switch control signal characterized by a duty cycle and capable of controlling said rectifier switch , said controller comprising:a) an integrator characterized by an integration time constant and operable to receive an integrator input signal and to produce an integrator output signal, wherein said integrator output signal is proportional to an antiderivative of said integrator input signal;b) a comparator operable to receive a comparator input signal and to output said switch control signal;c) a means to produce a frequency control signal, wherein a fundamental frequency of said frequency control signal is effectively equal to said switching frequency, and 'wherein said integrator input signal is effectively proportional to said error voltage, wherein said comparator input signal comprises a first comparator input component effectively proportional to said frequency control signal, wherein said comparator input signal comprises a second ...

POWER SUPPLY APPARATUS

A power supply apparatus includes converters connected in parallel to a three-phase alternating-current power supply, input current detectors that detect current flowing through the respective three phases of the three-phase alternating-current power supply, and load current detectors that detect load current of the converters. Each of the converters includes AC-DC converters inputs of connected to two of the three phases. The AC-DC converters are connected in parallel to each other using a common output. The AC-DC converters that are driven maintain balance of output current. A controller determines whether switching between a driven state and a stopped state of the respective AC-DC converters is performed based on detection results from the load current detectors and switches between the driven state and the stopped state of the respective multiple AC-DC converters based on detection results by the input current detectors. 1. A power supply apparatus comprising:a plurality of converters connected in parallel to a three-phase alternating-current power supply to convert alternating-current power from the three-phase alternating-current power supply into direct-current power to supply the direct-current power to different loads;a phase current detector to detect current flowing through a first phase line, a second phase line, and a third phase line of the three-phase alternating-current power supply; anda load current detector to detect load current of the plurality of converters; whereineach of the plurality of converters includes a first AC-DC converter an input of which is connected to the first phase line and the second phase line, a second AC-DC converter an input of which is connected to the first phase line and the third phase line, and a third AC-DC converter an input of which is connected to the second phase line and the third phase line;the first AC-DC converter, the second AC-DC converter, and the third AC-DC converter are connected in parallel to each ...

METHODS AND SYSTEMS FOR CONTROLLING CURRENT SOURCE RECTIFIERS

Current source rectifier (CSR) systems and methods for a power source including three phase lines are disclosed. One illustrative CSR system includes a rectifier operable to receive an AC input voltage and provide a DC output voltage and a controller communicatively coupled to the rectifier. The rectifier comprises first, second, and third phase legs including a plurality of switches with each switch coupled to an associated phase line of the three phase lines. The controller is operable to (i) control operation of the plurality of switches in accordance with a first switching sequence when measured input voltages on at least two phase lines of the three phase lines are outside of the predetermined voltage range and (ii) control operation of the plurality of switches in accordance with a second switching sequence when the measured input voltages on the at least two phase lines are within the predetermined voltage range. 1a rectifier operable to receive an alternating current (AC) input voltage and provide a direct current (DC) output voltage, the rectifier comprising first, second, and third phase legs including a plurality of switches, each switch of the plurality of switches coupled to an associated phase line of the three phase lines of the power source; anda controller communicatively coupled to the rectifier and operable to (i) control operation of the plurality of switches in accordance with a first switching sequence when measured input voltages on at least two phase lines of the three phase lines are outside of a predetermined voltage range and (ii) control operation of the plurality of switches in accordance with a second switching sequence when the measured input voltages on the at least two phase lines are within the predetermined voltage range,wherein controlling operation of the plurality of switches in accordance with at least one of the first and second switching sequences comprises (i) locking a switch from one of the first, second, and third phase ...

Variable Zero Voltage Switching (ZVS) Hybrid Controller for Power Factor Corrector (PFC)

A power factor corrector (PFC), such as for an on-board charger (OBC) for charging a vehicle traction battery, uses an input voltage and an input current from a power source to output a desired voltage. The PFC has an inductor and first and second power switches. A micro-controller generates, for each half-cycle of the input voltage, first and second reference signals respectively indicative of (i) a sinusoidal envelope of the inductor current for which the PFC will absorb sufficient power from the power source for the PFC to output the desired voltage and (ii) a reverse value of the inductor current for which zero voltage switching (ZVS) of the switches is ensured. A comparator assembly turns the first switch off (on) and the second switch on (off) upon the inductor current equaling the outer sinusoidal amplitude envelope (the reverse value) whereby the PFC outputs the desired voltage with ZVS.

Active Voltage Bus System and Method

A voltage converter () having a first bidirectional voltage line (), a second bidirectional voltage line (), a power storage element (L) arranged between the first bidirectional voltage line and the second bidirectional voltage line, a switch element electronically coupled to the power storage element, a controller () for controlling the switch, and the controller configured and arranged to adjust a current flow between the first voltage line and the second voltage line such that a voltage level on the second bidirectional voltage line is substantially maintained at a target DC voltage. 1. A voltage converter comprising:a first bidirectional voltage line;a second bidirectional voltage line;a power storage element arranged between said first bidirectional voltage line and said second bidirectional voltage line;a switch element electronically coupled to said power storage element; anda controller for controlling said switch, said controller configured and arranged to adjust a current flow between said first voltage line and said second voltage line such that a voltage level on said second bidirectional voltage line is substantially maintained at a target DC voltage.2. (canceled)3. (canceled)4. The voltage converter as set forth in claim 1 , wherein said voltage converter is configured and arranged to dynamically change said target DC voltage without a hardware reconfiguration.5. The voltage converter as set forth in claim 1 , and further comprising a bidirectional power factor correction stage claim 1 , wherein said power factor correction stage is configured and arranged to cause the power quality factor of the voltage converter to be approximately one.6. (canceled)7. (canceled)8. The voltage converter as set forth in claim 1 , wherein said first bidirectional voltage line is an AC voltage line with multiple phases claim 1 , and said voltage converter further comprises a modular subcircuit for each phase of said AC voltage line.9. The voltage converter as set forth ...

METHOD TO DETERMINE THREE-PHASE LOAD IMPEDANCES DRIVEN BYPOWER CONTROL DEVICE WHEN NO NEUTRAL REFERENCE IS AVAILABLE IN AN ALTERNATIVE ELECTRICAL NETWORK

In accordance with an example embodiment of the invention, a three-phase power control device is configured to synchronize firing thyristor or SCR sets in consecutive combinations of two of the three phases, to supply current to consecutive combinations of two of the three loads in a three-phase load configuration, to determine real branch impedance of each load from three combinations of two supplied loads, without need of any electrical neutral reference. 1. A three-phase power control device for a three-phase load configuration , comprising:a plurality of current sensors associated with the three-phase power control device, connect with corresponding first, second, and third phases of a three-phase power system providing power to a three-phase load configuration comprising a respective first load, a second load, and a third load, wherein each current sensor provides a value representative of current flow it senses through each corresponding phase of the three-phase power system;a plurality of voltage taps associated with the three-phase power control device, connected with the corresponding phases of the three-phase power system providing power to the three-phase load configuration;three full wave thyristor or SCR sets in corresponding phases of the three-phase power system, to conduct current in the corresponding phases of the three-phase power system;a memory in the power control device, configured to store a thyristor or SCR firing algorithm for firing the full wave thyristor or SCR sets in the corresponding phases of the three-phase power system, to conduct current in the corresponding phases of the three-phase power system; anda processor in the power control device, coupled to the memory and the plurality of current sensors and voltage taps, configured to synchronize firing the thyristor or SCR sets in consecutive combinations of two of the three phases, to supply current to consecutive combinations of two of the three loads in the three-phase load ...

METHOD FOR CONTROLLING A VIENNA RECTIFIER

A method for generating a current set point value for a charging device connected to an electrical network includes measuring at least one electrical voltage, calculating a filtered voltage according to the measured voltage and a value of electrical pulsation of the electrical network, estimating a frequency and the amplitude of the measured voltage according to the at least one measured voltage and the at least one filtered voltage, calculating a consolidated voltage according to the measured voltage and the filtered voltage, and generating a current set point value according to the consolidated voltage and the estimated amplitude. 110-. (canceled)11. A method of generating a current target value for a charging device connected to an electricity grid , comprising:measuring at least one voltage;calculating at least one filtered voltage based on said at least one measured voltage and a value of the electrical angular frequency of the electricity grid;estimating a frequency and the amplitude of said at least one measured voltage based on said at least one measured voltage and said at least one filtered voltage;calculating a consolidated voltage based on said at least one measured voltage and said at least one filtered voltage, said calculating the consolidated voltage providing a consolidated voltage close to said at least one low-voltage measured voltage and close to said at least one filtered voltage while moving further away from zero; andgenerating a current target value based on said consolidated voltage and the estimated amplitude.12. The method as claimed in claim 11 , wherein the method is implemented several successive times claim 11 , and said value of the electrical angular frequency of the calculating at least one filtered voltage is determined based on a frequency estimated in a previous implementation.13. The method as claimed in claim 11 , wherein the charging device is a three-phase charging device claim 11 , and the measuring comprises measuring the ...

ACTIVE RECTIFICATION CONTROL

A method of active rectification control of an active rectifier includes detecting a phase angle and a frequency of a voltage input of the active rectifier; regulating a DC output voltage of the active rectifier with d-q components of a pole voltage; and aligning a reference current input of the active rectifier to the d-q components of the pole voltage. 1. A method of active rectification control of an active rectifier , comprising:detecting a phase angle and a frequency of a voltage input of the active rectifier;regulating a DC output voltage of the active rectifier with d-q components of a pole voltage; andaligning a reference current input of the active rectifier to the d-q components of the pole voltage.2. The method of claim 1 , wherein the detecting of the phase angle and the frequency includes monitoring zero-crossing events of the voltage input.3. The method of claim 2 , wherein the monitoring of the zero-crossing events includes determining if a zero-crossing event has occurred and adding the zero-crossing event to a circular buffer of previous zero-crossing events.4. The method of claim 1 , wherein the detecting of the phase angle of the voltage input includes adding a phase-change value to a previous phase angle value.5. The method of claim 1 , wherein the regulating of the DC output voltage of the active rectifier with d-q components of the voltage input includes calculating a Clarke transformation of the voltage inputs based on the phase angle to determine the d-q components of the pole voltage.6. The method of claim 1 , wherein the aligning of the reference current input includes determining a non-zero reference current based on the d-q components of the pole voltage.7. The method of claim 1 , wherein the regulating of the DC output voltage of the active rectifier with d-q components of the pole voltage includes calculating a Park transformation of the voltage input based on the frequency to determine the d-q components of the pole voltage.8. The ...

PFC CIRCUIT

In one embodiment, a power factor correction (PFC) circuit can include: (i) a rectifier bridge and a PFC converter coupled to an input capacitor; (ii) a harmonic wave compensation circuit configured to shift a phase of a DC input voltage provided from the rectifier bridge, where the harmonic wave compensation circuit comprises a phase of about −45° when a corner frequency is about 50 Hz; and (iii) a PFC control circuit configured to control the PFC converter, where the PFC control circuit comprises a first sampling voltage, and the harmonic wave compensation circuit is configured to control a phase of the first sampling voltage to lag a phase of the DC input voltage by about 45°. 1. A power factor correction (PFC) circuit , comprising:a) a rectifier bridge and a PFC converter coupled to an input capacitor;b) a harmonic wave compensation circuit configured to shift a phase of a DC input voltage provided from said rectifier bridge; andc) a PFC control circuit configured to control said PFC converter, wherein said PFC control circuit comprises a first sampling voltage, and said harmonic wave compensation circuit is configured to control a phase of said first sampling voltage to lag a phase of said DC input voltage by about 45°.2. The PFC circuit of claim 1 , wherein said harmonic wave compensation circuit comprises:a) a harmonic compensation resistor coupled to said DC input voltage and a common node; andb) a harmonic compensation capacitor coupled to said common node and ground, wherein said common node is coupled to said PFC control circuit.3. The PFC circuit of claim 1 , wherein said PFC control circuit comprises:a) a voltage sampling circuit coupled to said harmonic wave compensation circuit, and being configured to generate said first sampling voltage;b) a current sampling circuit configured to sample an output current of said PFC converter to generate a second sampling voltage;c) an error signal amplifier circuit configured to receive said first and second ...

POWER SUPPLY APPARATUS

In this uninterruptible power supply apparatus, respective phase differences between first to third carrier wave signals (CS to CS) for a converter () and fourth to sixth carrier wave signals (CS to CS) for an inverter () are set to 180 degrees in an inverter power feed mode and a bypass power feed mode, and respective phase differences between the first to third carrier wave signals and the fourth to sixth carrier wave signals are set to 0 degree in an overlap power feed mode. Zero-phase current (I, I) and circulating current (ICL) therefore can be reduced. 1. A power supply apparatus comprising:a forward converter that converts first AC power supplied from a commercial AC power supply to DC power;a reverse converter that converts DC power to second AC power having a commercial frequency;a first switch connected between the reverse converter and a load;a second switch connected between the commercial AC power supply and the load; a first power feed mode in which the first switch is turned on, the second switch is turned off, and the second AC power is supplied to the load,', 'a second power feed mode in which the first and second switches are turned on and the first and second AC powers are supplied to the load, and', 'a third power feed mode in which the first switch is turned off, the second switch is turned on, and the first AC power is supplied to the load; and, 'a first control unit that performs any one of power feed modes including'}a second control unit that controls each of the forward converter and the reverse converter, wherein a first voltage command unit that generates a first voltage command value corresponding to AC voltage input to the forward converter,', 'a second voltage command unit that generates a second voltage command value corresponding to AC voltage output from the reverse converter,', 'a signal generating unit that generates first and second carrier wave signals,', 'a first comparison unit that compares the first voltage command value ...

Method and Apparatus for Eliminating Harmonic Components and Obtaining a Uniform Power Factor in Alternating Current-Direct Current and Direct Current-Alternating Current Converters

The present patent application relates to a method and equipment for eliminating harmonics based on two complementary techniques, namely the elimination of harmonics by selective harmonic elimination pulse-width modulation in conjunction with the multiple-wiring transformer. The association of these two resources is capable of reducing the harmonic distortion of currents to extremely low values, providing a truly unitary power factor. The technology is suitable for low and medium intensity alternating current—direct current and direct current—alternating current converters, which make interface with the electricity network and should have low harmonic distortion of the current because of the high power value involved, and also because of fragility of the electricity network (low power of short circuit at the coupling point).

MOTOR CONTROL APPARATUS AND ELECTRIC POWER STEERING CONTROL APPARATUS EQUIPPED WITH THE MOTOR CONTROL APPARATUS

When a voltage application command is outputted to a three-phase winding of one system, a d-axis proportionality constant and a q-axis proportionality constant are set with Ld and Lq, respectively, as parameters; when voltage application commands are outputted to three-phase windings of two systems, a d-axis proportionality constant and a q-axis proportionality constant are set with [Ld+Md] and [Lq+Mq], respectively, as parameters. 17-. (canceled)8. A motor control apparatus for controlling a permanent-magnet synchronous motor having three-phase windings of two systems that are magnetically coupled with each other , the motor control apparatus comprising:two respective inverters that are provided in the two systems and each of which converts DC electric power into AC electric power and applies a voltage to the three-phase winding of the system to which that inverter itself belongs;a current detector that detects a motor current flowing in the three-phase winding; anda controller that calculates a voltage command, based on the detected motor current and a motor current target value, and then controls the inverter by use of the calculated voltage command,wherein letting a d axis, a q axis, Ld, Lq, Md, and Mq denote a direction of a rotor magnetic pole provided in a rotor of the permanent-magnet synchronous motor, a direction having a phase difference of 90° electric angle from the d axis, a d-axis self-inductance of the permanent-magnet synchronous motor, a q-axis self-inductance thereof, a d-axis inter-system mutual inductance, and a q-axis inter-system mutual inductance, respectively, the controller has a d-axis current control device and a q-axis current control device, each of which calculates the voltage command by multiplying the difference between the motor current target value and the motor current by a proportionality constant,wherein the current control device changes a parameter related to the proportionality constant, in accordance with the number of the ...

POWER CONVERSION APPARATUS, CONTROL DEVICE FOR POWER CONVERSION APPARATUS, AND METHOD FOR CONTROLLING POWER CONVERSION APPARATUS

A power conversion apparatus includes a power converter, an LC filter, and a controller. The power converter is disposed between an AC power source and a load. The LC filter is disposed between the AC power source and the power converter. The controller controls the power converter to perform power conversion control between the AC power source and the load. The controller includes a command generator, an oscillation component acquirer, a regulator, and an actuator. The command generator generates an input current command including a command of an input current of the power converter. The oscillation component acquirer acquires an oscillation component of a current flowing through a capacitor of the LC filter. The regulator regulates the input current command based on the oscillation component acquired by the oscillation component acquirer. The actuator controls the power converter based on the input current command regulated by the regulator. 1. A power conversion apparatus comprising:a power converter disposed between an AC power source and a load;an LC filter disposed between the AC power source and the power converter; and a command generator configured to generate an input current command comprising a command of an input current of the power converter;', 'an oscillation component acquirer configured to acquire an oscillation component of a current flowing through a capacitor of the LC filter;', 'a regulator configured to regulate the input current command based on the oscillation component acquired by the oscillation component acquirer; and', 'an actuator configured to control the power converter based on the input current command regulated by the regulator., 'a controller configured to control the power converter to perform power conversion control between the AC power source and the load, the controller comprising2. The power conversion apparatus according to claim 1 , further comprising a voltage detector configured to detect a voltage of the capacitor claim ...

Vehicle on-board charger with snubber circuit

An on-board charger is provided with a bulk capacitor adapted to couple to a vehicle traction battery and a relay for receiving electrical power from an external power supply and to pre-charge the bulk capacitor. A power factor correction (PFC) circuit is connected between the bulk capacitor and the relay. The PFC circuit includes a switch that is adjustable between an on-position and an off-position. The switch enables current flow from the relay to the bulk capacitor in the off-position. A snubber circuit is coupled to the switch to damp a transient voltage present at the switch during a transition from the on-position to the off-position. A processor is programmed to control the switch.

SYSTEMS AND METHODS FOR POWER MONITORING AND CONTROL

An apparatus for power monitoring and voltage suppression comprising a reference node, a first transformer, a second transformer, a third transformer, a resistive element, a ground fault indicator, a current detector, a power quality meter, and a meter power supply is provided. The transformers have first sides and secondary sides, with the secondary sides connected in series. The resistive element and the ground fault indicator are connected in parallel to the secondary sides of the transformers. The circuit connecting the secondary sides, the resistive element, and the ground fault indicator is not electrically connected to ground. 1. An apparatus for power monitoring and voltage control in a three-phase power supply , wherein the three-phase power supply comprises at least a first , second , and third single-phase power supply , each single-phase power supply corresponding to a respective phase of the three-phase power supply bus , the apparatus comprising: a reference node;', 'a first transformer having a primary side and a secondary side, wherein the first transformer primary side has a first primary terminal coupled to the first single-phase power supply and a second primary terminal coupled to the reference node, and wherein the first transformer secondary side has a first secondary terminal and a second secondary terminal;', 'a second transformer having a primary side and a secondary side, wherein the second transformer primary side has a third primary terminal coupled to the second single-phase power supply and a fourth primary terminal coupled to the reference node, and wherein the second transformer secondary side has a third secondary terminal coupled to the second secondary terminal and a fourth secondary terminal;', 'a third transformer having a primary side and a secondary side, wherein the third transformer primary side has a fifth primary terminal coupled to the third single-phase power supply and a sixth primary terminal coupled to the reference ...

WIRELESS POWER SYSTEM

A system and method are provided for a feed-forward control of an inverter to reduce, and potentially minimize, a DC link capacitor of a wireless power transfer system. The feed-forward control may be utilized to reduce the capacitance of the DC link capacitor in a single-phase series-series compensated WPT system. 1. A wireless power transfer (WPT) system for wirelessly providing AC power to an electric vehicle or a plug-in electric vehicle , the WPT system comprising: a DC-link capacitor bank to facilitate providing, during operation of the WPT system, a DC voltage with a ripple;', {'sub': 'DC', 'a voltage sensor to measure the DC voltage across the DC-link capacitor bank as a DC voltage signal V(t);'}, 'an H-bridge having a first phase leg and a second phase leg, the H-bridge coupled with the DC-link capacitor bank and configured to convert the DC voltage to a high-frequency AC voltage; and', [{'sub': 'DC', 'receive the DC voltage signal V(t) from the voltage sensor,'}, 'generate a driving signal for driving the H-bridge, and', {'sub': 'DC', 'apply a first instance of the driving signal to the first phase leg, and a second instance of the driving signal to the second phase leg, where the first and second instances of the driving signal have a relative phase shift α(t) that varies nonlinearly with the DC voltage signal V(t).'}], 'control circuitry configured to], 'an off-board module comprising2. The WPT system of claim 1 , wherein the control circuitry comprises a microcontroller configured to implement the relative phase shift α(t) that varies nonlinearly with the DC voltage signal V(t).3. The WPT system of claim 1 , wherein the relative phase shift α(t) is based on a target amplitude Vof a fundamental component of the high-frequency AC voltage.4. The WPT system of claim 3 , wherein a frequency of the fundamental component of the high-frequency AC voltage is 22 kHz or 85 kHz.6. The WPT system of claim 1 , wherein claim 1 , for a WPT system power rating of 100 kW ...

APPARATUS TO REALIZE FAST BATTERY CHARGING AND MOTOR DRIVING FOR ELECTRIC VEHICLES USING ONE AC/DC CONVERTER

An apparatus includes a controller, a switching block, and a three-phase bidirectional AC/DC converter. The switching block has a first interface connected to a power grid, a second interface connected to an electric motor, and a third interface connected to the three-phase bidirectional AC/DC converter that includes first, second, and third single-phase AC/DC conversion modules, and which have inputs and outputs joined at an output node, and a respective transformer configured to provide electrical isolation. In a first mode of operation, the switching block connects the power grid to the AC/DC converter for charging a battery connected to the output node and disconnects the electric motor. In a second mode of operation, the switching block disconnects the power grid and connects the electric motor to the AC/DC converter which is controlled to convert DC power drawn from the battery to energize the electric motor. 1. An electric power conversion apparatus , comprising:an electronic controller including a processor and a memory;a switching block controlled by said controller and having a first interface configured to be connected to a power grid source for receiving a first AC signal having first, second, and third phases, said switching block having a second interface configured to be connected to an electric motor;a three-phase bidirectional AC/DC converter configured to be connected to a third interface of said switching block and including first, second, and third single-phase AC/DC conversion modules each connected to and controlled by said controller, said AC/DC conversion modules having respective inputs, respective outputs joined at an output node, and a respective transformer configured to provide electrical isolation;wherein in a first mode of operation, said controller controls said switching block to assume a first condition that (i) connects said first and third interfaces so that said power grid is connected to said three-phase AC/DC converter which is ...

PFC CIRCUITS WITH VERY LOW THD

A boost chopper circuit is described that an alternating current (AC) power source; at least one inductor connected to said AC power source; a rectifier connected to said inductor and AC power source; at least one switch shorting our said rectifier; a series circuit connected in parallel with said switch of at least one diode and a capacitor; and a load connected in parallel with said capacitor. A control technique is employed that includes turning on and off the switch in order to keep the average current per pulse cycle proportional to the AC input voltage during the same pulse cycle. 18-. (canceled)9. A power factor correction circuit to operate in a discontinuous current mode comprising:a three-phase alternating current (AC) power source;three capacitors star-connected across the three-phase AC power source;the source of three-phase AC power connected to respective center taps of three transformer primaries;anodes of three first diodes connected to respective first ends of the three center-tapped primaries;cathodes of the three first diodes shorted together and denoted as a first short;cathodes of three second diodes connected to the respective second ends of the three center-tapped primaries;anodes of the three second diodes shorted together and denoted as a second short;a switching device connected between the first short and the second short;three transformer secondaries;anodes of three third diodes connected to the respective three transformer secondaries;cathodes of the three third diodes shorted together as a third short;respective other sides of the three secondaries shorted together as a fourth short;a load capacitor connected between the third short and the fourth short;a load connected in parallel with the load capacitor;a fixed frequency fixed pulse width generator to turn on and off the switching device;wherein the fixed frequency fixed pulse width generator pulse width is varied to control a load voltage.10. The circuit of claim 9 , wherein only one ...

Power Supply with Power Factor Correction Circuit

A power supply with power factor correction circuit, comprises three rectifier modules, receiving a first phase voltage, a second phase voltage and a third phase voltage, and further including a filter, a single power factor correction circuit, and a working voltage convertor, wherein the filter receives one voltage and produces a filtering voltage to the single power factor correction circuit, the single power factor correction circuit then produces correction voltage to the working voltage convertor, and the working voltage convertor produces direct voltage; wherein the working voltage convertor can be the full-bridge phase-shifted convertor. 1. A power supply with power factor correction circuit , connected with a three-phase voltage , and comprising: a filter, receiving one voltage from the three-phase voltage, and producing a filtering voltage;', 'a single power factor correction circuit, being coupled to the filter, receiving the filtering voltage, producing a correction voltage, and having a main switch; and', 'a working voltage convertor, being coupled with the single power factor correction circuit and a voltage output terminal, receiving the correction voltage, and producing an working voltage to the voltage output terminal; wherein the working voltage is direct voltage; wherein the working voltage convertor of one rectifier module is coupled with the working voltage convertors of other two rectifier modules;, 'three rectifier modules, receiving three voltage from the three-phase voltage including a first phase voltage, a second phase voltage and a third phase voltage, and each rectifier module further comprisingat least one power factor correction controller, being connected to the main switches and configured to switch the main switches; andan analog device, being connected to the working voltage convertor and configured to control the working voltage convertor.2. The power supply with power factor correction circuit of claim 1 , wherein the working ...

CHOKE AND EMI FILTER CIRCUITS FOR POWER FACTOR CORRECTION CIRCUITS

A converter circuit is provided and includes: a first EMI filter connected to AC lines and includes one or more across-the-line capacitors; a charging circuit that receives power from the first EMI filter and limits an amount of current passing from the first EMI filter to a DC bus; and a PFC circuit of a compressor drive that provides PFC between an output of the charging circuit and a generated first DC voltage. The PFC circuit includes: a rectification circuit that rectifies the power from the AC lines or a charging circuit output; and a second EMI filter connected downstream from the rectification circuit and including a DC bus rated capacitor. The second EMI filter outputs a filtered DC signal based on a rectification circuit output. The PFC circuit, based on the second EMI filter output, outputs the first DC voltage to the DC bus to power the compressor drive. 1. A converter circuit comprising:a first electromagnetic interference filter connected to alternating current (AC) lines and comprising one or more across-the-line capacitors;a charging circuit configured to (i) receive power from the first electromagnetic interference filter, and (ii) limit an amount of current passing from the first electromagnetic interference filter to a direct current (DC) bus; and a rectification circuit configured to rectify the power from the AC lines or an output of the charging circuit depending on whether the rectification circuit is upstream or downstream from the charging circuit, and', 'a second electromagnetic interference filter connected downstream from the rectification circuit and comprising one or more DC bus rated capacitors, wherein the second electromagnetic interference filter is configured to output a filtered DC signal based on an output of the rectification circuit, and, 'a power factor correction circuit of a compressor drive, wherein the power factor correction circuit is configured to provide power factor correction between an output of the charging circuit ...

Charging apparatus for electric vehicle

A charging apparatus is provided. The apparatus includes an AC power input stage receiving at least one AC input power from among single-phase AC power and multi-phase AC power. A power factor corrector has a single three-leg half bridge circuit receiving the AC input power through the AC power input stage. A link capacitor is charged through the power factor corrector. A converter connects between the link capacitor and a battery. A first switch connects any one of an AC power input line and a neutral line of the AC power input stage to the power factor corrector. A second switch selectively connects the AC power input stage to the power factor corrector, or the link capacitor. A controller operates the power factor corrector and the switch network based on the received condition of the AC input power.

PFC CIRCUITS WITH VERY LOW THD

A boost chopper circuit is described that an alternating current (AC) power source; at least one inductor connected to said AC power source; a rectifier connected to said inductor and AC power source; at least one switch shorting our said rectifier; a series circuit connected in parallel with said switch of at least one diode and a capacitor; and a load connected in parallel with said capacitor. A control technique is employed that includes turning on and off the switch in order to keep the average current per pulse cycle proportional to the AC input voltage during the same pulse cycle. 111-. (canceled)12. A power factor correction circuit to operate in a discontinuous current mode comprising:three single phase full-wave rectifiers;three capacitors across respective first and second inputs of the three single-phase full-wave rectifiers;a three-phase alternating current power source connected to respective second inputs of the three single-phase full-wave rectifiers;respective first inputs of the single-phase full-wave rectifiers shorted together;three series circuits of a primary of a transformer and a switching device connected in parallel with respective outputs of the three single-phase full-wave rectifiers;three transformer secondaries;anodes of three diodes connected to the respective three transformer secondaries;cathodes of the three diodes shorted together as a first short;respective other sides of the three secondaries shorted together as a second short;a load capacitor connected between the first short and the second short;a load connected in parallel with the load capacitor;a fixed frequency fixed pulse width generator to turn on and off the three switching devices;wherein the fixed frequency fixed pulse width generator pulse width is varied to control a load voltage.13. The circuit of claim 12 , wherein only one phase of the three phase alternating current (AC) power source is used.14. The circuit of claim 12 , wherein the transformers are air-core co- ...

HIGH VOLTAGE DIRECT CURRENT POWER GENERATOR FOR COMPUTER SERVER DATA CENTERS

Some embodiments include a high voltage direct current (HVDC) power generator system for information technology (IT) racks. The HVDC power generator system can include a three-phase alternating current (AC) transformer having a primary winding and a plurality of secondary windings. A plurality of three-phase bridge rectifier circuits can be electrically coupled respectively to the plurality of secondary windings. The HVDC power generator system can include output terminals for powering its load. A first string of bridge rectifier circuits can be in series with each other and a first inductor. A second string of bridge rectifier circuits can be in series with each other and a second inductor. The first and second strings can be electrically coupled in parallel to the output terminals. 1. A high voltage direct current (HVDC) power generator system , comprising:output terminals for powering a load of the HVDC power generator system;a three-phase alternating current (AC) transformer having a primary winding and a plurality of secondary windings; anda plurality of three-phase bridge rectifier circuits electrically coupled respectively to the plurality of secondary windings; andwherein a first string of bridge rectifier circuits in series with each other and a first inductor and a second string of bridge rectifier circuits in series with each other and a second inductor are electrically coupled in parallel to the output terminals.2. The HVDC power generator system of claim 1 , wherein the plurality of secondary windings includes four secondary windings claim 1 , wherein each of the four secondary windings provides for four different phase shifts in constant and increasing steps.3. The HVDC power generator system of claim 2 , wherein the plurality of secondary windings includes a Y-configuration winding claim 2 , a delta-configuration winding claim 2 , and two extended delta configuration winding.4. The HVDC power generator system of claim 1 , wherein the primary winding ...

STACKABLE ISOLATED VOLTAGE OPTIMIZATION MODULE

Various examples are provided for isolated voltage optimization and control. In one example, a stackable isolated voltage optimization module (SIVOM) includes a transformer having a turns ratio between a primary winding and a secondary winding; a switching circuit configured to energize the secondary winding with a voltage provided from the three-phase power system or short the secondary winding; and a connection block configured to couple the switching circuitry to the first phase and a neutral, or to second and third phases of the three-phase power system. In another example, a system includes a SIVOM coupled to each phase of a three-phase power system, where each SIVOM comprises: a transformer and a switching circuit configured to boost or buck a voltage or change a phase angle of the phase coupled to that SIVOM by energizing a secondary winding of the transformer with a voltage provided from the three-phase power system. 1. A stackable isolated voltage optimization module (SIVOM) , comprising:a transformer having a turns ratio between a primary winding and a secondary winding of the transformer, where the primary winding is configured to be supplied by first phase of a three-phase power system;a switching circuit configured to energize the secondary winding with a voltage provided from the three-phase power system or short the secondary winding; anda connection block configured to couple the switching circuitry to the first phase and a neutral of the three-phase power system, or to second and third phases of the three-phase power system.2. The SIVOM of claim 1 , wherein energizing the secondary winding with a voltage from the first phase and the neutral of the three-phase power system boosts or bucks the voltage of the first phase without affecting phase angle of the first phase.3. The SIVOM of claim 2 , wherein the voltage boost or buck is based upon the turns ratio of the transformer and a polarity of the connection to the second and third phases of the three- ...

Regulated ac-dc hybrid rectifier

A regulated hybrid AC-DC rectifier employing a boost stage is disclosed herein. The regulated hybrid AC-DC rectifier comprises a 12 pulse inductive current splitter/merger (CSM) system coupled to a boost stage. The boost stage may be regulated using a PWM controller. The regulated hybrid AC-DC rectifier may further include a three phase input filter configured to regulate the harmonic content of the AC-DC hybrid converter within a desired limit. The regulated hybrid AC-DC rectifier may further comprise a notch filter system configured to tune out harmonic ripples at known intervals, such as 11 th and 13 th order harmonics.

POWER CONVERSION SYSTEM OF MULTI-PHASE GENERATOR AND METHOD OF OPERATING THE SAME

A power conversion system of a multi-phase generator used to provide a power factor correction for a multi-phase generator. The power conversion system of the multi-phase generator includes a multi-phase power conversion unit and a control unit. The multi-phase power conversion unit receives a plurality of generator voltages and a plurality of generator currents generated from the multi-phase generator, and converts the generator voltages into a DC voltage and a DC current. The control unit controls the generator currents to linearly follow the generator voltages, therefore the power factor correction for the multi-phase generator is achieved. 1. A power conversion system of a multi-phase generator , providing a power factor correction for a multi-phase generator , the power conversion system comprising:a multi-phase power conversion unit configured to receive a plurality of generator voltages and a plurality of generator currents generated from the multi-phase generator, and convert the generator voltages to output a DC voltage and a DC current; and an outer control loop configured to receive the DC voltage and one of the generator voltages, and output at least one current command;', 'a discontinuous current limiter configured to receive the at least one current command to limit a maximum value of the at least one current command, and output the at least one current command to be a current limiting command; and', 'an inner control loop configured to receive the DC current and the current limiting command to control the multi-phase power conversion unit;, 'a control unit comprisingwherein the control unit is configured to control the current limiting command to control the generator currents to linearly follow the generator voltages.2. The power conversion system as recited in claim 1 , wherein the outer control loop comprises:a power curve lookup table is configured to receive one of the generator voltages to output a first current command; anda voltage control ...

THREE-PHASE PARALLEL POWER CONVERTER LOAD ADJUSTMENT

A sharing criteria metric is received for each of three phases of a three-phase power. Loads on power converters receiving the three phase power are adjusted based on the sharing criteria metric of each of the three phases. 1. An apparatus comprising:a controller to:receive a sharing criteria metric for each of three phases of a three-phase power; andgenerate control signals to adjust loads on single phase power converters receiving the three phase power based on the sharing criteria metric of each of the three phases.2. The apparatus of claim 1 , wherein the sharing criteria metric comprises a temperature.3. The apparatus of claim 1 , wherein the sharing criteria metric comprises electrical current.4. The apparatus of claim 1 , wherein the controller is to adjust loads on the single phase power converters to enhance a degree of electrical current balance across the three phases.5. The apparatus of claim 4 , wherein the single phase power converters have loads which are adjustable by the controller and wherein the controller is to adjust loads a on the single phase power converters to enhance a degree of electrical current balance across the single phase power converters and at least one additional single phase power a converter receiving the three-phase power but having a load which is not adjustable by the controller.6. The apparatus of claim 1 , wherein the sharing criteria metric is from outputs of a power distribution unit.7. The apparatus of claim 1 , wherein the sharing criteria metric is from outputs of a transformer.8. The apparatus of claim 7 , wherein the single phase power converters have loads which are adjustable by the controller and wherein the controller is to adjust loads on the single phase power converters to enhance a degree of electrical current balance across the single phase power converters and a power distribution unit receiving the three-phase power but having single phase power converters having loads which are not a adjustable by the ...

CONTROL OF AN ELECTRICAL CONVERTER

An electrical system including a three phase AC input supply and three or more H-bridge converter cells. Each H-bridge converter cell has: an active front end rectifier for receiving the three phase AC input supply and transforming it into a DC supply, thereby providing a rectifier current i; a capacitor suitable to receive a capacitor current i, the capacitor smoothing the DC supply; and an inverter suitable to receive an inverter current i, wherein i=i−i, said inverter transforming the received inverter current iinto a single phase AC supply. The system also including a control subsystem, which provides a signal to each active front end rectifier to vary its respective rectifier current isuch that the difference between the rectifier current i, provided by the active front end rectifier, and the inverter current i, received by the inverter, is substantially zero. 1. An electrical system including:a three phase AC input supply; [{'sub': 'i', 'an active front end rectifier for receiving the three phase AC input supply and transforming it into a DC supply providing a rectifier current i,'}, {'sub': 'c', 'a capacitor suitable to receive a capacitor current i, the capacitor smoothing the DC supply, and'}, {'sub': o', 'o', 'i', 'c', 'o, 'an inverter suitable to receive an inverter current i, wherein i=i−i, said inverter transforming the received inverter current iinto a single phase AC supply; and'}], 'three or more H-bridge converter cells, each H-bridge converter cell having{'sub': i', 'i', 'o, 'a control subsystem, which provides a signal to each active front end rectifier to vary its respective rectifier current isuch that the difference between the rectifier current i, provided by the active front end rectifier, and the inverter current i, received by the inverter, is substantially zero.'}2. The electrical system of claim 1 , wherein the control subsystem modifies said signal based upon a feed-forward load current corresponding to the inverter current i.3. The ...

Method and system for power management using a power converter in transport

Methods and systems for power management using a power converter in transport are provided. In one embodiment, the method includes monitoring a varying AC input to the power converter. The method also includes calculating a power factor adjustment based on the monitored varying AC input. Also, the method includes a power converter controller adjusting the power converter based on the calculated power factor adjustment to cause the power converter to supply a reactive current to a varying AC load.

DEVICE FOR TRANSFORMING AND FOR RECTIFYING POLYPHASE VOLTAGE

Device for transforming and for rectifying polyphase, in particular three-phase, voltage comprising a polyphase transformer () comprising a voided central zone (), a voltage rectifier circuit () that is connected to the transformer and a fan (). 1. A device for transforming and for rectifying polyphase voltage comprising a polyphase transformer comprising a voided central zone , a voltage rectifier circuit that is connected to the transformer and a fan , wherein the voltage rectifier circuit includes at least three heat dissipation units forming a right prism of regular polygonal section having a voided central zone , wherein the transformer , the voltage rectifier circuit and the fan are positioned such that at least some of the airflow produced by the fan flows through the voided central zone of the rectifier so as to immerse the transformer.2. The device for transforming and for rectifying polyphase voltage according to claim 1 , wherein directrix axes of the fan claim 1 , of the rectifier circuit and of the transformer are parallel to or aligned with one and the same axis (A claim 1 , B) such that the airflow is channelled by the rectifier circuit.3. The device for transforming and for rectifying polyphase voltage according to claim 1 , wherein the peripheral face of the transformer and that of the rectifier circuit are parallel or coplanar claim 1 , planes.4. The device for transforming and for rectifying polyphase voltage according to claim 1 , further comprising a first diffuser placed between the fan and the rectifier circuit claim 1 , a first end of the diffuser bordering the fan and a second end of the diffuser making contact with the rectifier circuit claim 1 , the sections of the first and second ends of the diffuser being substantially identical to those of the fan and of the rectifier circuit claim 1 , respectively claim 1 , so as to channel the airflow into the rectifier circuit.5. The device for transforming and for rectifying polyphase voltage ...

Three-Level Power Conversion System and Control Method

A power conversion system includes a first power conversion port including a three-level power factor correction device and a primary power conversion circuit, a second power conversion port including a three-level rectifier and a third power conversion port including a rectifier, the first power conversion port, the second power conversion port and the third power conversion port magnetically coupled to each other through a transformer. 1. A system comprising:a first power conversion port including a three-level power factor correction device and a primary power conversion circuit;a second power conversion port including a three-level rectifier; anda third power conversion port including a rectifier, the first power conversion port, the second power conversion port and the third power conversion port magnetically coupled to each other through a transformer.2. The system of claim 1 , wherein the three-level power factor correction device is a three-level neutral point clamped (NPC) power factor correction converter claim 1 , and the primary power conversion circuit includes a primary switching network of a three-level inductor-inductor-capacitor (LLC) converter and a resonant tank.3. The system of claim 1 , wherein the three-level power factor correction device includes input ports connected to a single-phase AC power source claim 1 , a first output port connected to a first voltage bus claim 1 , a second output port connected to a second voltage bus claim 1 , and a third output port connected to a third voltage bus.4. The system of claim 3 , wherein an output voltage of the three-level rectifier is regulated through adjusting a voltage across the first voltage bus and the second voltage bus.5. The system of claim 3 , further comprising a first diode claim 3 , a second diode connected in series with the first diode between the first voltage bus and the second voltage bus claim 3 , a first capacitor claim 3 , and a second capacitor connected in series with the first ...

Uninterruptible power system and operation method thereof

An uninterruptible power system and an operation method thereof are provided. The uninterruptible power system comprises a DC-AC conversion circuit, a plurality of switches, a plurality of sensing units, a plurality of output ports and a control unit. Each output port is electrically coupled to an output terminal of the DC-AC conversion circuit sequentially through one of the sensing units and one of the switches. The control unit is configured to define members of at least one group from the output ports according to a system setting, and define which members of each group are non-critical output ports according to the system setting. The control unit is further configured to set, according to the system setting, at least one condition for all non-critical output ports in each group to simultaneously stop supplying power, and to accordingly control the operations of the corresponding switches.

Power converter

The invention provides a power converter for converting a three-phase alternating current (AC) supply to a direct current (DC) output, the power converter comprising: a first selector configured to select one of the highest, the second highest or the lowest instantaneous phase to phase voltages of the three-phase supply to provide a first power rail; a second selector configured to select a different one of the highest, the second highest or the lowest instantaneous phase to phase voltages of the three-phase supply to provide a second power rail; a first transformer coupled to the first power rail; a second transformer coupled to the second power rail; a combiner configured to combine the outputs of the first and second transformers to provide the DC output; and a duty cycle controller configured to vary duty cycles of the first and/or second transformers to thereby vary the relative contributions of the first and second power rails to the DC output.

전력 변환기

적어도 3개의 위상을 갖는 AC 신호와 DC 신호 사이를 변환하기 위한 전기 변환기로서, 적어도 3개의 위상 단자, 제1 DC 단자 및 제2 DC 단자, 적어도 3개의 위상 단자에서 AC 전류 및 제1 및 제2 중간 노드(p, n)에서의 제1 DC 전류 사이를 변환하도록 동작 가능한 제1 변환기 스테이지, 제3 및 제4 중간 노드(q, r)에서의 제1 DC 신호와 제1 및 제2 DC 단자에서의 제2 DC 신호 사이를 변환하도록 동작 가능한 제2 변환기 스테이지, 스타-포인트(k)를 갖는 커패시터 네트워크(C in )를 포함하는 제1 필터 스테이지, 제1 중간 노드(p)를 제3 중간 노드(q) 및 제2 중간 노드(n)를 제4 중간 노드(r)에 연결하는 DC 링크를 포함한다. 제2 변환기 스테이지는 제1 및 제2 DC 단자 사이의 중간 전압 노드(m)와 중간 전압 노드(m)와 동일한 전위에서 중간포인트 노드(들)를 갖는 부스트 회로를 포함한다. DC 링크는 공통 모드 필터를 포함하고, 공통 모드 필터는 중간 전압 노드(m)를 스타-포인트(k)에 연결하는 공통 모드 커패시터(C CM )를 포함한다.

power factor correction device

삼상 교류가 입력되는 역률 개선 장치에 있어서, 간이한 구성과 제어에 의해 확실한 역률 개선과 안정된 전력 변환을 행한다. 삼상 교류가 입력되는 제1, 제2 및 제3 입력단(R, S, T)에 각각 일차 코일의 일단이 접속된 3개의 트랜스(Tr, Ts, Tt)과, 각일차 코일의 타단 전압이 일단에 인가되어 1차측의 공통 전위단에 타단이 접속되고 또한 제어단(G)을 구비하는 하나 또는 복수의 스위칭 소자(Q1, Q2, Q3)가라고, 3개의 트랜스(Tr, Ts, Tt)의 각각의 이차 코일의 타단 전압이 일단에 인가되고 또한 정극 출력단(p)에 흐르는 전류를 각각 도통 가능하게 하는 제1, 제2 및 제3 정류 디바이스(D1, D2, D3)가라고, 정극 출력단(p)과 부극 출력단(n) 사이에 접속된 평활 콘덴서(C)를 갖고, 스위칭 소자(Q1, Q2, Q3)의 제어단(G)이 일정한 듀티비를 갖는 하나의 제어 신호(Vg)에 의해 제어된다. A power factor improving device to which a three-phase alternating current is input WHEREIN: A reliable power factor improvement and stable power conversion are performed by simple structure and control. Three transformers (Tr, Ts, Tt) each having one end of a primary coil connected to the first, second, and third input terminals R, S, T to which three-phase alternating current is input, and the voltage at the other end of each primary coil is applied to, the other end is connected to the common potential end of the primary side, and there is one or a plurality of switching elements Q1, Q2, Q3 having a control end G, each of the three transformers Tr, Ts, Tt The voltage at the other end of the secondary coil of and a smoothing capacitor C connected between the negative output terminal n, and the control terminal G of the switching elements Q1, Q2, Q3 is controlled by one control signal Vg having a constant duty ratio .

Multiphase Voltage Converter

(과제) 출력 전압을 영으로 출력할 수 있게 함과 동시에 초기 충전 회로를 불필요로 한다. (Problem) The output voltage can be output to zero, and an initial charging circuit is unnecessary. (해결수단) 전원(6)과 다이오드 브릿지(3)의 입력부 간에 교류 스위치(2)를 설치하고 다이오드 브릿지(3)의 입력부에는 성형 결선된 리액터(1)를 접속하고, 리액터(1)의 전류가 불연속이 되며 교류 스위치(2)를 온, 오프하는 것에 의해 종래보다 낮은 직류 전압으로도 입력 전류를 정현파형으로 할 수 있게 한다. 평활 콘덴서(4)가 교류 스위치(2)를 거쳐서 전원(6)과 접속되고 있으므로, 그 초기 충전 회로도 불필요하게 된다. (Solution means) An AC switch 2 is provided between the power supply 6 and the input of the diode bridge 3, and the reactor 1, which is molded and connected, is connected to the input of the diode bridge 3, and the current of the reactor 1 Is discontinuous, and by turning on and off the AC switch 2, the input current can be made sinusoidal even at a lower DC voltage than conventionally. Since the smoothing capacitor 4 is connected to the power supply 6 via the AC switch 2, the initial charging circuit is also unnecessary.

3-level power topology

According to one aspect, embodiments of the invention provide a power supply system comprising an input configured to receive input AC power from an input power source, an output configured to provide output AC power to a load, a converter coupled to the input and configured to convert the input AC power into converted DC power, a first DC bus coupled to the converter and configured to receive the converted DC power, an inverter coupled to the first DC bus and the output and configured to convert DC power from the first DC bus into the output AC power, a first DC switch circuit coupled between the first DC bus and neutral and a controller coupled to the first DC switch circuit and configured to operate the first DC switch circuit such that voltage on the first DC bus is zero during switching operation of the converter and the inverter.

Multiphase power converter

Mehrphasen-Stromrichter des Spannungstyps, umfassend: eine Leistungsquelle (6) mit einer n-phasigen Wechselspannungsquelle und n Augangsanschlüssen entsprechend den n Phasen, wobei n eine ganze Zahl gleich oder größer als 2 ist, eine Diodenbrücke (3), mittels derer Wechselspannungen der n-phasigen Wechselspannungsquelle in eine Gleichspannung umgesetzt werden, und die n Eingangsanschlüsse aufweist, von denen jeder mit einem zugeordneten der Augangsanschlüsse der Leistungsquelle verbunden ist, n Schalter (S1, S2, S3), von denen jeder zwischen einem jeweiligen der Ausgangsanschlüsse der Leistungsquelle und dem zugeordneten Eingangsanschluß der Diodenbrücke angeordnet ist, und eine Mehrzahl von Drosseln (1), von denen jede mit einem jeweiligen der Eingangsanschlüsse der Diodenbrücke (3) verbunden ist, wobei die Schalter so steuerbar sind, daß der Eingangsstrom jeder Phase sinusförmig wird, dadurch gekennzeichnet, daß jeder der Schalter eine Antiparallelschaltung aus einem unidirektionalen Halbleiterschaltelement und einer Diode umfaßt und daß alle Halbleiterschalter (S1–S3) gleichzeitig ein- bzw. ausschaltbar sind. A multiphase power converter of the voltage type, comprising: a power source (6) having an n-phase AC source and n output terminals corresponding to the n phases, where n is an integer equal to or greater than 2, a diode bridge (3) by which AC voltages of the n phased AC source are converted into a DC voltage, and having n input terminals, each of which is connected to an associated one of the output terminals of the power source, n switches (S1, S2, S3), each of which between a respective one of the output terminals of the power source and the a plurality of chokes (1), each of which is connected to a respective one of the input terminals of the diode bridge (3), the switches being controllable such that the input current of each phase becomes sinusoidal, characterized that each of the switches an anti-parallel circuit of an un Includes idirektionalen ...

3-level power topology

According to one aspect, embodiments of the invention provide a power supply system comprising an input configured to receive input AC power from an input power source, an output configured to provide output AC power to a load, a converter coupled to the input and configured to convert the input AC power into converted DC power, a first DC bus coupled to the converter and configured to receive the converted DC power, an inverter coupled to the first DC bus and the output and configured to convert DC power from the first DC bus into the output AC power, a first DC switch circuit coupled between the first DC bus and neutral and a controller coupled to the first DC switch circuit and configured to operate the first DC switch circuit such that voltage on the first DC bus is zero during switching operation of the converter and the inverter.

三级电力拓扑

根据一个方面，本发明的实施例提供了供电系统，包括：输入端，其被配置成接收来自输入电源的输入AC电力；输出端，其被配置成向负载提供输出AC电力；变换器，其耦合于输入端并且被配置成将输入AC电力变换成经变换的DC电力；第一DC总线，其耦合于变换器并且被配置成接收经变换的DC电力；逆变器，其耦合于第一DC总线和输出端并且被配置成将来自第一DC总线的DC电力变换成输出AC电力；第一DC开关电路，其耦合在第一DC总线和中性点之间；以及控制器，其耦合于第一DC开关电路并且被配置成操作第一DC开关电路，使得在第一DC总线上的电压在变换器和逆变器的切换操作期间是零。

三级电力拓扑

根据一个方面，本发明的实施例提供了供电系统，包括：输入端，其被配置成接收来自输入电源的输入AC电力；输出端，其被配置成向负载提供输出AC电力；变换器，其耦合于输入端并且被配置成将输入AC电力变换成经变换的DC电力；第一DC总线，其耦合于变换器并且被配置成接收经变换的DC电力；逆变器，其耦合于第一DC总线和输出端并且被配置成将来自第一DC总线的DC电力变换成输出AC电力；第一DC开关电路，其耦合在第一DC总线和中性点之间；以及控制器，其耦合于第一DC开关电路并且被配置成操作第一DC开关电路，使得在第一DC总线上的电压在变换器和逆变器的切换操作期间是零。

在线式不间断电源

本发明提供了一种在线式不间断电源，包括：正直流母线、负直流母线；推挽电路，其包括正极输入端子、负极输入端子、包括初级绕组和次级绕组的变压器、以及整流电路，所述整流电路的输入端连接至所述次级绕组，且输出端连接至所述正直流母线和负直流母线；缠绕在所述变压器的初级侧的充电绕组，所述充电绕组的一端连接至所述初级绕组的一端；连接在所述推挽电路的负极输入端子和所述充电绕组的另一端之间的单向可控充电线路；以及第一开关管和第二开关管，所述正直流母线通过所述第一开关管连接至所述次级绕组的一端，所述次级绕组的另一端通过第二开关管连接至所述负直流母线。本发明的在线式不间断电源降低了成本，并提高了带半波负载能力。

Converter system for supplying an electrical load

一种变流器系统包括用于输入AC功率信号的每一相的DC母线；每一相的第一开关单元，包括在DC母线两端串联耦合的第一两个有源开关并在第一两个有源开关之间形成第一开关单元AC电极，该第一开关单元AC电极被耦合到相应的相；以及每一相的第二开关单元，包括在DC母线两端串联耦合的第二两个有源开关并在第二两个有源开关之间形成第二开关单元AC电极，这些第二开关单元AC电极彼此耦合以形成飞中性线。第一开关单元和第二开关单元中的一个开关单元以大于线路频率至少一个数量级的频率进行开关。第一开关单元和第二开关单元中的另一个开关单元以近似等于线路频率的频率进行开关。