СИСТЕМА ПЛАВНОГО ЗАПУСКА ЭЛЕКТРИЧЕСКОГО ДВИГАТЕЛЯ

FIELD: electrical equipment; engine building. SUBSTANCE: invention can be used in start-up systems of engines receiving power from high and low voltage alternating current electrical systems. Start-up system of electric motor (M), powered from electric network, wherein start-up system comprises electronic control circuit (7) and electronic circuit breaker (10) for controlling motor phase (M), wherein electronic circuit breaker (10) is controlled by circuit (7) of control. Start-up system comprises sensor (3) for supplying analogue signal (4) characterizing current derivative passing in engine phase (M), detector card (5), which comprises means for converting said analogue signal (4) into binary signal (6), which characterizes changes in the sign of said analogue signal, and comprises means for transmitting said binary signal to control circuit (7) in order to optimize control of electronic circuit breaker (10). EFFECT: technical result is elimination of noise and higher efficiency of thyristors control in power supply circuit of electric motor. 11 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 716 015 C2 (51) МПК H02P 1/04 (2006.01) H02P 1/26 (2006.01) H02P 1/28 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H02P 1/04 (2020.01); H02P 1/26 (2019.08); H02P 1/28 (2019.08) (21)(22) Заявка: 2016134447, 24.08.2016 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): ШНЕЙДЕР ЭЛЕКТРИК ЭНДЮСТРИ САС (FR) Дата регистрации: 05.03.2020 04.09.2015 FR 15 58204 (43) Дата публикации заявки: 01.03.2018 Бюл. № 7 (45) Опубликовано: 05.03.2020 Бюл. № 7 2 7 1 6 0 1 5 R U (54) СИСТЕМА ПЛАВНОГО ЗАПУСКА ЭЛЕКТРИЧЕСКОГО ДВИГАТЕЛЯ (57) Реферат: Изобретение относится к области управляет схема (7) управления. Система запуска электротехники и может быть использовано в содержит датчик (3), предназначенный для подачи системах запуска двигателей, получающих аналогового сигнала (4), характеризующего питание от ...

Patent RU2016134447A3

Verfahren zum wiederholten Betrieb eines frequenzumrichtergespeisten Motors

Variable impedance for starting cage induction motors - uses thyristor control and introduces progressive short circuiting to adjust impedance level

The object is to build a starting circuit for very large cage type induction motors without using a large number of controlling semiconductors. In the starting mode the motor (9) is connected to an intermediate busbar (2) which is in turn connected to the mains (1) through a reactor with an air gap core (3) and two mutually coupled windings (4, 5). One winding (4) is in series between supply and motor whilst the other can be short circuited by two anti-parallel connected phase controlled thyristors (6). The series reactor winding (4) is designed to absorb about 25% of the vailable voltage when the other winding is open circuit. As the motor runs up the second winding is progressively short circuited for longer periods until the short circuit reactance is reached. At this point, the motor can be switched (10) directly onto the supply (1) and the starting circuits isolated (7, 8).

Verfahren zur Drehmomentbegrenzung beim Sanftanlauf von Drehstromasynchronmotoren

Anlaufsteuerungsverfahren und Vorrichtung zu dessen Betrieb

CONTROL SYSTEM FOR AN INDUCTION MOTOR DRIVE

Parallel use of soft starters

Improvements in and relating to electric remote control devices

... 918,441. Control of A.C. motors. BROOKE, W., and HOWE, H. Nov. 29, 1960, No. 40932/60. Addition to 864,714. Class 38 (3). [Also in Group XXXIX] In the controlled saturable reactor described in the parent Specification in which internal feed-back is produced by a rectifying circuit connected at W1, W2 between the parallel main winding groups PA1, PA2 and PB1 PB2 associated with respective cores A and B, additional feed-back excitation which is externally derived is supplied to the rectifying circuit in parallel with, and to augment the internal feedback. As shown in Fig. 1, the rectifying circuit comprises a full-wave bridge-rectifier T having its D.C. terminals connected to W1 and W2 and its A.C. terminals energized from the secondary winding of a potential transformer E. The transformer primary winding Ep is connected in series with the A.C. windings CRa of a saturable control reactor CR to the output circuit L1a, L2 of the main reactor C. When a load WA is to be energized, a switch Q ...

Fittings of order for automatic switchgear.

ANLASS-STEUERANORDNUNG FUR EINEN PHASENANSCHNITTGESTEUERTEN KURZSCHLUSSLAUFER-ASYNCHRONMOTOR

CURRENTREGULAR APPROACH AND PROTECTION OF MEANS ENERGY EKONOMISER FUER INDUCTION MOTORS.

ENERGY ECONOMISER CONTROLLED-CURRENT START AND PROTECTION FOR INDUCTION MOTOR

STARTING ARRANGEMENT FOR A.C. MOTORS

HYBRID MOTOR STARTER

HYBRID MOTOR STARTER Both solid state static control devices and electromagnetically operated contactors are employed in an a-c motor starter. The solid state control devices are operated by an acceleration control circuit to accelerate the motor during start-up. When synchronous speed is achieved, a run contactor is energized and its contacts are closed to conduct motor current. Under steady state conditions, therefore, the solid state control devices are bypassed.

SYSTEM AND METHOD FOR INDIVIDUAL PHASE MOTOR OVER VOLTAGE PROTECTION

A motor controller comprises a plurality of solid state switches each for connection between an AC line and a motor winding terminal for controlling application of AC power to the motor. A plurality of voltage sensors, each associated with one of the solid state switches, sense voltage for an associated motor winding. A control circuit controls operation of the solid state switches. The control circuit adjusts firing to one of the solid state switches if the sensed voltage for the associated winding varies from a threshold voltage by a select amount.

Grenzschalter.

Vorrichtung zum Anlassen grosser Drehstrommotoren mittels Anlasstransformators.

Einrichtung zur Steuerung des elektrischen Feldes längs eines unter Spannung stehenden Objektes.

Anlasstransformator für grosse Wechselstrommaschinen

Anordnung für den Sanftanlauf eines Drehstrommotors zum Antrieb einer Textilmaschine

Dispositif de commande électrique assurant un fonctionnement en séquence des éléments d'un appareillage électrique

Dispositif pour contrôler l'alimentation d'une machine électrique à courant alternatif

Dispositif électrique de commande d'un appareil à induction

Vorrichtung zum Verringen von Einschaltstromstössen beim Anschalten eines elektrischen Verbrauchers

Method for influencing the rotation speed of a three-phase motor having two separate windings

COMMANDE DE MOTEUR ELECTRIQUE A COURANT ALTERNATIF

L'INVENTION CONCERNE LES COMMANDES DE MOTEURS ELECTRIQUES A COURANT ALTERNATIF. ELLE SE RAPPORTE A UNE COMMANDE DANS LAQUELLE UN CIRCUIT 16 A RETARD COMMANDE UN CIRCUIT 18 DE COMMUTATION AYANT DES COMMUTATEURS 24A ET 24B. SELON L'INVENTION, APRES LA FERMETURE DU COMMUTATEUR 14, LE CIRCUIT 16 A RETARD COMMANDE LA TRANSMISSION D'UNE TENSION MOYENNE ACCRUE AU MOTEUR 12 ET, APRES L'ECOULEMENT DU RETARD VOULU, IL OUVRE LE COMMUTATEUR 24A ET FERME LE COMMUTATEUR 24B SI BIEN QUE LE MOTEUR 12 RECOIT UNE TENSION MOYENNE PLUS FAIBLE. APPLICATION A LA REDUCTION DE L'ENERGIE CONSOMMEE PAR LES MOTEURS ELECTRIQUES A COURANT ALTERNATIF.

Three=phase motor starter circuit - uses thyristors as starter impedances varying their firing time in dependence on line phase current drawn by stator windings

CONTROLLER Of an Electrical motor

Appareil de commande d'un moteur électrique polyphasé, comprenant d'une part deux interrupteurs statiques bidirectionnels associés chacun à un pôle de contacteur de shuntage (S) monté en parallèle, ces interrupteurs étant pilotés par un circuit de commande assurant un fonctionnement gradué du moteur, caractérisé en ce que le contacteur de shuntage (S) est de type tétrapolaire et porte des pièces de connexion massives (6, 7) reliant chacune deux bornes dudit contacteur, ces pièces de connexion (6, 7) étant reliées par paires (L1, L3) aux bornes des interrupteurs statiques de manière que chacun soit connecté à deux pôles.

ADJUSTING DEVICE FOR AN ENGINE HAS CURRENT THREE-PHASE

A control voltage, which is dependent on an actual value and a required value, is supplied through a regulator (21) to the controllable rectifiers which are located in the winding circuits of the three-phase motor. The actual value is supplied by an actual-value sensor (20) which is coupled to the drive shaft of the motor, and the required value is supplied by a required-value transmitter (26). The required-value transmitter produces the required value by integrating an adjustable input signal, additionally differentiating the input signal, by means of a rounding device (25), for smooth acceleration and braking of the rotation speed, and the differentiated input signal being included in the integration process with opposite polarity to the original input signal. Once the differentiation process has been completed, the required value rises or falls with an adjustable gradient until a maximum or minimum value is reached. This method is particularly suitable for controlling the drive motor of a passenger lift.

MULTISTAGE VOLTAGE REGULATING APPARATUS FOR ALTERNATING CURRENT MACHINES

Async. squirrel cage motor starting and brake control - connects rectified third phase to motor converter second phase input for braking

SYSTEM AND PROCESS FOR a DETECTION OF BLOCKING Of an ENGINE.

Un système formant démarreur de moteur comporte des commutateurs (32) à semi-conducteur pour une connexion entre une ligne à courant alternatif et des bornes (T1, T2, T3) de moteur pour commander l'application d'une puissance à courant alternatif au moteur. Un capteur de tension détecte une tension de ligne à courant alternatif et la tension de borne de moteur. Des capteurs de courant détectent du courant de moteur. Un circuit 34 de commande commande le fonctionnement des commutateurs 32 à semi-conducteur. Le circuit 34 de commande limite le courant de commutateur pendant un mode de démarrage et détecte un état de blocage en réponse à la tension de ligne à courant alternatif détecté et à la tension de borne au moteur détectée et amplifie de manière sélective le courant de moteur pendant le mode de démarrage si un état de blocage est détecté.

New electrical equipment for winch of load, in particular on board ship

SYSTEM AND METHOD FOR FAST START-UP OF AN INDUCTION MOTOR

A system for controlling operation of a motor drive during fast start-up of an induction motor includes an AC motor drive having a PWM inverter and a control system to generate a command signal to cause the PWM inverter to control an output of the AC motor drive. The control system includes a start-up modulator that is selectively operable during start-up acceleration of the AC motor, the start-up modulator programmed to determine a motor current applied to the AC motor and a voltage of a DC bus, generate a first frequency offset that causes a frequency reference of the command signal to be decreased when the motor current is greater than a reference current threshold, and generate a second frequency offset that causes the frequency reference of the command signal to be increased when the DC bus voltage is greater than a reference voltage threshold.

SOFT-STARTER AC-AC CONVERTER WITH INTEGRATED SOLID-STATE CIRCUIT BREAKER AND METHOD OF OPERATION THEREOF

An AC-AC power converter, such as a motor soft starter, includes an input connectable to an AC source with a disconnect switch, an output connectable to an AC load, and phase lines connecting the input and output to transmit power. In-line solid-state switching blocks are connected between line terminals and load terminals of the AC source and AC load, respectively, such that each phase line includes a solid-state switching block connected thereto. Free-wheeling solid-state switching blocks are connected to the load terminals at one end and together at a common connection at another end, such that each phase line includes a free-wheeling solid-state switching block connected thereto. Each of the in-line and free-wheeling solid-state switching blocks comprises a bi-directional switching block that selectively controls current and withstands voltage in both directions. The switching blocks also provide soft-starter functions, variable speed control, and integrated circuit breaker protection ...

METHOD FOR OPERATING A 3-PHASE CONTROLLER CIRCUIT

The invention relates to a method for operating a 3-phase controller circuit, especially a soft start device for 3-phase motors, with a controllable semi-conductor circuit (2) in two of its three phase branches (L1-T1, L2-T2, L3-T3), respectively. The problem with known methods for controlling asymmetrically constructed circuits of this type are the unwanted side affects, such as torque fluctuations, that occur in motors to be controlled or similar. The invention solves this problem by providing that the two semiconductor circuits (2) of the phase branches to be controlled are controlled asymmetrically.

MOTOR SOFT-STARTER CONTROL

Examples include a method for controlling a motor soft-starter for starting an electric motor on a three-phases electric network in order to compensate a misbalance between the windings of the electric motor due to a misbalance between the phases of the electric network.

Способ пуска мощной индуктивной нагрузки от автономных инверторов напряжения

FIELD: electrical equipment; mechanics. SUBSTANCE: invention relates to methods and can be used for start-up of asynchronous AC motors. Method, which enables to perform independent cold start-up and power supply of powerful inductive load, in particular, containing asynchronous motor, from independent power sources (voltage inverters), differs by the fact that the solution is achieved by the method of resistor limitation by the specified time of the amplitude of the starting current of the load motor below the value of operation of protection of VI (UPS), but not lower than the value at which the engine can still start and unwind, and which can be used in the form of a simple circuit design with voltage inverters and uninterrupted power supplies of medium and high power. EFFECT: technical result is provision of cold start and power supply (if necessary) from independent current sources (VI and UPS) – such household electric appliances as refrigerators, circulating pumps, powerful fans, air conditioners, et cetera, id est having above-mentioned asynchronous motor. 1 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 693 835 C1 (51) МПК H02P 1/28 (2006.01) H02P 1/50 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК H02P 1/28 (2019.02); H02P 1/50 (2019.02) (21)(22) Заявка: 2018128099, 31.07.2018 (24) Дата начала отсчета срока действия патента: 05.07.2019 Приоритет(ы): (22) Дата подачи заявки: 31.07.2018 (56) Список документов, цитированных в отчете о поиске: RU 2422977 C1, 27.06.2011. RU (45) Опубликовано: 05.07.2019 Бюл. № 19 2 6 9 3 8 3 5 R U 2572097 С1, 27.12.2015. RU 2407139 C2, 20.12.2010. RU 4719 U1, 10.08.2005. JP 2008187763 A, 14.08.2008. KR 20110008666 A, 27.01.2011. US 5969497 A1, 19.10.1999. US 20080258672 A1, 23.10.2008. WO 2015099992 A2, 02.02.2015. (54) Способ пуска мощной индуктивной нагрузки от автономных инверторов напряжения (57) Реферат: Изобретение относится к способам и может двигатель, от ...

СИСТЕМА ПЛАВНОГО ЗАПУСКА ЭЛЕКТРИЧЕСКОГО ДВИГАТЕЛЯ

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2016 134 447 A (51) МПК H02P 1/28 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2016134447, 24.08.2016 (71) Заявитель(и): ШНЕЙДЕР ЭЛЕКТРИК ЭНДЮСТРИ САС (FR) Приоритет(ы): (30) Конвенционный приоритет: 04.09.2015 FR 15 58204 Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 6 1 3 4 4 4 7 R U A (57) Формула изобретения 1. Система запуска электрического двигателя (М), питаемого от электрической сети, при этом система запуска содержит электронную схему (7) управления и электронный прерыватель (10) переключения для управления фазой двигателя (М), при этом электронным прерывателем (10) управляет схема (7) управления, при этом система запуска содержит датчик (3), предназначенный для подачи аналогового сигнала (4), характеризующего производную тока, проходящего в фазе двигателя (М), отличающаяся тем, что содержит детекторную карту (5), которая содержит средства преобразования упомянутого аналогового сигнала (4) в двоичный сигнал (6), характеризующий изменения знака упомянутого аналогового сигнала, и содержит средства передачи упомянутого двоичного сигнала в схему (7) управления, при этом средства передачи сначала преобразуют двоичный сигнал в оптический сигнал (6), который передается в схему (7) управления по оптическому волокну. 2. Система запуска по п. 1, отличающаяся тем, что детекторная карта (5) содержит средства фильтрации аналогового сигнала (4). 3. Система запуска по п. 1, отличающаяся тем, что схема управления преобразует принятый оптический сигнал в электрический сигнал. 4. Система запуска по п. 1, отличающаяся тем, что электронный прерыватель (10) содержит два тиристора (Ta,Tb), установленные валетом параллельно с цепью успокоения, содержащей резистор (R), последовательно соединенный с конденсатором (С). 5. Система запуска по п. 1, отличающаяся тем, что датчик является тором Роговского ...

Selbsttaetiger Schuetzenanlasser fuer Wechselstrommotoren

PROCEDURE FOR THE OPERATION OF A THREE-PHASE ALTERNATING CURRENT PLATE CIRCUIT

ENGINE STARTING CIRCUIT, IN PARTICULAR FOR REFRIGERATOR COMPRESSORS

PROCEDURE FOR STARTING A SYNCHRONOUS ENGINE AND EQUIPMENT FOR THE EXECUTION OF THIS PROCEDURE.

NUMBER OF REVOLUTIONS RULE ARRANGEMENT FOR A OVER CONTROLLABLE ONE SEMICONDUCTOR ELECTRIC RECTIFIER FEEDING THREE-PHASE ALTERNATING CURRENT SYNCHRONOUS ENGINE, IN PARTICULAR A HEBEZEUGES

STARTER TAX ARRANGEMENT FUR A PHASEINGATE-STEERED SHORT-CIRCUIT RUN RA SYNCHRONOUS MOTOR

SYSTEM AND METHOD FOR SOFT STARTING A THREE PHASE MOTOR

Electrical switchgear

METHOD FOR ACTUATING A MOTOR FOR STARTING A MILL

The invention relates to a method for actuating a motor (16) for starting up a mill (6) with material (20) to be milled. In order to permit more cost-efficient starting up of the mill in comparison to the prior art, it is proposed that the motor (16) for triggering sedimentation of the material (20) to be milled of the mill (6) be initially fed by a first inverter (25), that the motor (16) be subsequently disconnected from the first inverter (25), and that in a further step the motor (16) be connected to a first power system (21) which has a first power system voltage, wherein the maximum output voltage of the first inverter (25) is lower than the first power system voltage.

PARALLEL USE OF SOFT STARTERS

A system for controlling an AC motor is provided. The system comprises an electrical connection path for connecting an electrical input of the AC motor to a first phase of alternating current from an electric power supply. The system also comprises two or more motor controllers, each motor controller is located on the electrical connection path between the electric power supply and the AC motor and is operable to regulate current of the first phase passing through it. Each motor controller is connected in parallel, relative to the other motor controllers, to the electrical connection path. At least one processor is configured to control the motor controllers to repeatedly change which of the motor controllers current of the first phase passes through, such that at any given time current of the first phase only passes through one of the motor controllers. A corresponding method is also provided.

System and method for individual phase motor over voltage protection

Optimum supply of an electric motor.

DISPOSITIF POUR LE DEMARRAGE D'UN MOTEUR ELECTRIQUE ASYNCHRONE

L'INVENTION CONCERNE UN DISPOSITIF POUR LE DEMARRAGE D'UN MOTEUR ELECTRIQUE ASYNCHRONE DU TYPE POSSEDANT UN ENROULEMENT STATORIQUE PAR PHASE ET UN ROTOR DE FAIBLE IMPEDANCE. LE DISPOSITIF VISE PAR L'INVENTION COMPREND, PAR PHASE, UNE PAIRE DE THYRISTORS AGENCES TETE-BECHE 2 ET UN CIRCUIT D'AMORCAGE DE CES DERNIERS. CE CIRCUIT D'AMORCAGE EST ESSENTIELLEMENT COMPOSE D'UN GENERATEUR DE RAMPE 5 ADAPTE POUR DELIVRER UN SIGNAL DE RAMPE D'AMPLITUDE CROISSANTE AVEC LE TEMPS, DE FACON A AUTORISER UNE MISE EN CONDUCTION PROGRESSIVE DES THYRISTORS 2, FONCTION DE L'AMPLITUDE DUDIT SIGNAL DE RAMPE.

DEVICE OF ENGINE CONTROL HAS INDUCTION THREE-PHASE

CONTROL METHOD FOR VERIFYING THE COMPATIBILITY BETWEEN A VARIABLE SPEED DRIVE AND THE INPUT FILTER

L'invention concerne un procédé de commande pour vérifier la compatibilité entre un filtre d'entrée (1) et un variateur de vitesse (2). Le procédé consiste à : - Appliquer plusieurs commandes successives pour définir plusieurs points de fonctionnement du moteur électrique, Pour chaque point de fonctionnement : Mesurer la tension continue du bus, Comparer la variation maximale (?Vdc_m) de l'amplitude de la tension continue mesurée pour ledit point de fonctionnement avec une valeur seuil (?Vdc_ref), Définir un nouveau point de fonctionnement tant que ladite variation maximale de l'amplitude de la tension continue est inférieure à ladite valeur seuil, Déterminer une plage de fonctionnement comprenant tous les points de fonctionnement pour lesquels ladite variation maximale de l'amplitude la tension continue est inférieure à ladite valeur seuil. The invention relates to a control method for checking the compatibility between an input filter (1) and a variable speed drive (2). The method consists in: - Applying several successive commands to define several points of operation of the electric motor, For each operating point: Measuring the DC voltage of the bus, Compare the maximum variation (? Vdc_m) of the amplitude of the measured DC voltage for said operating point with a threshold value (? Vdc_ref), defining a new operating point as long as said maximum variation in the amplitude of the DC voltage is less than said threshold value, determining a range of operation comprising all the points of operation for which said maximum variation of the amplitude the DC voltage is lower than said threshold value.

Microprocessor controller for escalator - collects operating data and monitor security functions to deliver control signal to thyristor motor controller

Device of starting for polyphase squirrel-cage engines of current powers

Apparatus for the ordering of engines with induction and engines with induction equipped with the known as apparatus

ELECTRIC MOTOR CONTROLLER WITH BYPASS CONTACTOR

3상 모우터가 트리거시에 각 상의 전원으로부터 모우터에 전기를 전환시키는 일련의 다이리스터를 갖는 제어기에 의하여 작동된다. 이 모우터는 AC전원의 각 싸이클에서 연속하여 증가하는 부분에서 전도상태가 되도록 다이리스터를 트리거시키므로서 기동된다. 제어기에 대한 냉각필요기구의 이용을 줄이기 위하여 콘택터가 다이리스터에 병렬로 연결되어 모우터가 최고속도에 이르렀을 때에 모우터에 전원을 인가한다. 제어기가 모우터정지신호를 수신할 때에 콘택터의 작동이 중지되고 제어기는 AC전원의 위상에 다이리스터 트리거링 과정을 동기화시키는 시퀀스에 들어간다. 동기화과정은 콘택터제어로부터 모우터에 대한 전원의 다이리스터 제어로 원활한 변환이 이루어지도록 한다. 다이리스터 제어가 재개되었을 때에 제어기는 모우터에 인가되는 전압을 감소시키는 트리거링 루우틴을 실행한다.

PRIME MOVER FOR OPERATING AN ELECTRIC MOTOR

Un moteur primaire tel qu'un générateur à microturbines est mis en oeuvre pour générer du courant continu et un inverseur est commandé pour convertir le courant continu en courant alternatif. Le courant alternatif est fourni à un moteur électrique. La fréquence du courant alternatif est augmentée progressivement pendant le démarrage du moteur pour réduire le courant d'appel arrivant subitement dans le moteur. La fréquence ou la circulation du courant alternatif peuvent être variées en réponse aux besoins spécifiques pendant le fonctionnement normal du moteur.

Motor control system and vacuum pump equipped with the motor control system

A motor control system has a rotary member, a motor for imparting a torque to the rotary member, a motor driving circuit for supplying power to the motor, and a drive control circuit for controlling a motor current supplied to the motor. An upper limit value of the motor current supplied to the motor is set so as to be variable. At the start of the motor, the drive control means controls the motor current by using the upper limit value as a set value.

Device for controlling a soft start or stop for AC motors, so-called soft starters

Eine Einrichtung für die Kontrolle eines sanften Anlaufs oder Auslaufs von Drehstrommotoren (1), sog. Soft-Startern, ist zum Starten von schweren mechanischen, elektrischen oder hydraulischen Antrieben vorgesehen. Um eine Raumersparnis bei Einzel- oder Vielfach-Anordnung und eine bessere Zugänglickeit bei der Wartung zu erzielen, ist in einem Schaltschrank (2) zumindest eine Schaltzelle (3) gebildet, die zumindest den 3phasigen Leistungsblock (4), die Leistungselektronik (5) sowie Schaltschütze (6; 18) umfasst und als Einheit nach vorne leicht ausbaufähig oder umgekehrt einbaufähig und ohne Befestigung an einer Rücken- oder Seitenwand (8) des Schaltschranks (2) angeordnet ist, außerdem ist vorgesehen, dass hingegen ein an der Schaltschrankwand (2) befestigter Trennschalter (9) mit einem Sammelschienen-Anschluss (10) mittels einer steckbaren Kontaktkupplung (10a) beim Einschieben verbindbar oder beim Ausfahren lösbar ist. A device for controlling a soft start or run-out of three-phase motors (1), so-called soft starters, is intended for starting heavy mechanical, electric or hydraulic drives. In order to achieve space savings in single or multiple arrangement and better accessibility during maintenance, at least one switching cell (3) is formed in a switchgear cabinet (2), comprising at least the 3-phase power block (4), the power electronics (5) and In addition, it is provided that, on the other hand, at the control cabinet wall (2) is arranged switch contactors (6, 18) and as a unit forward easily expandable or vice versa and without mounting on a back or side wall (8) of the cabinet (2) is arranged fixed disconnect switch (9) with a busbar connection (10) by means of a plug-in contact coupling (10a) when inserted connectable or detachable during extension.

Apparatus for controlling an electric motor

SLOW STARTER FOR THREE PHASE INDUCTION MOTOR

PURPOSE: To enable the ideal and smooth acceleration by providing two or more acceleration torque setting functions in the circuit for controlling the thyristor gates connected to one phase of the three-phase induction motor and changing the acceleration torque during the acceleration. CONSTITUTION: When the power source of the motor 3 is turned on, a control circuit 10 gives ignition angles α1 and α2 to thyristors 1 and 2. When the current of the motor 3 which is detected by a commutator 4 reaches the set value I1, the output signal is generated in a comparator 8. The gate control circuit 10 gives the ignition angle α3 to the thyristors 1 and 2. When the current of the motor 3 reaches the set value I3, the output signal is generated in a comparator 9, and the gate control circuit ignites all the thyristors. Thus, the ideal acceleration pattern can be obtained. COPYRIGHT: (C)1981,JPO&Japio ...

DRIVING APPARATUS OF INDUCTION MOTOR

УСТРОЙСТВО ДЛЯ КОНТРОЛЯ ПЛАВНОГО ПУСКА И ОСТАНОВКИ ТРЕХФАЗНЫХ ЭЛЕКТРОДВИГАТЕЛЕЙ (СОФТСТАРТЕР)

... 1. Устройство для контроля плавного пуска и остановки трехфазных электродвигателей (1), так называемый софтстартер, предвключенное для запуска тяжелых механических, электрических и гидравлических приводов, в котором отдельные узлы силового блока (4) с тиристорами (16), силовыми электронными устройствами (5), а также с контакторами объединены в распределительном шкафу (2), отличающееся тем, что, по меньшей мере, одна распределительная ячейка (3), содержащая, по меньшей мере, трехфазный силовой блок (4), относящиеся к нему силовые электронные устройства (5), а также необходимые контакторы, выполнена в распределительном шкафу (2) и в раме (7) с окружающими распределительную ячейку стенками (3b) и с прикреплением выступающих в установочном направлении (26) опорных изоляторов (28), которые выполнены в виде одного блока с возможностью легкого извлечения вперед и вставления обратно, без прикрепления к задней или боковой стенке (8) распределительного шкафа (2), и, напротив, разъединитель (9) прикреплен ...

Harmonics-free starter system for async motor

The starter system combines one or more multi-phase resistances and NTC thermistors to ensure that appropriate switch-on currents and subsequent current levels are maintained whilst starting up the motor to the point when the bridging contactor closes. In this way a master timer serves to limit the maximum starting time and repeat starts whilst simultaneously providing single phasing protection. Adjustment of the switching elements can be by screw, plug or sliding contacts. All current carrying components can be provided with large surface areas to provide rapid cooling down or be fan cooled.

ANTRIEBSMASCHINE ZUM BETREIBEN EINER ELEKTRISCHEN MASCHINE

METHOD AND APPARATUS FOR RUNNING CONTROL OF A LOOM

Method for automatic running control of a loom, comprises applying high voltage to the primary winding (C1-C3) of the loom drive motor (M) during loom starting period, and lowering the applied voltage at a predetermined time after starting, the power source voltage being unchanged. Specifically the applied voltage is lowered before, or when, or after, the loom reaches normal running condition. Pref. the high voltage is maintained by keeping the motor primary winding in delta connection mode, and shifting to star connection mode for voltage lowering and normal running. Stripe defects in fabric are avoided by high start-up torque of the motor, which ensures proper beating-up.

Sanftstarter, Betriebsverfahren und Schaltsystem

Die Erfindung betrifft einen Sanftstarter (10) zum Schalten mindestens einer Hauptstrombahn (12, 14, 16), die jeweils eine Bypass-Schaltung (20) mit einem Halbleiterschalter (22) umfasst, wobei der Sanftstarter (10) eine Steuereinheit (40) zur Betätigung der Bypass-Schaltung (20) aufweist und die Steuereinheit (40) mit einem Steuersignaleingang (44) versehen ist. Es ist vorgesehen, dass die Steuereinheit (40) einen separaten Sicherheitssignaleingang (42) aufweist. The invention relates to a soft starter (10) for switching at least one main current path (12, 14, 16), each comprising a bypass circuit (20) with a semiconductor switch (22), wherein the soft starter (10) comprises a control unit (40) for Operation of the bypass circuit (20) and the control unit (40) is provided with a control signal input (44). It is provided that the control unit (40) has a separate safety signal input (42).

Soft start with low voltage supplies

In a low voltage system such as a mobile vibrator motor circuit, the capacity Ca of the RaCa soft start circuit is connected to the motor rather than ground, whereby to slow its rate of discharge and hence its apparent size. The switching on of MOSFET MI is thereby slowed without the need for large capacitor.

Improvements in or relating to starters for alternating current motors

... 1,097,427. Control of A.C. motors. T. KAWABE. April 5, 1965, No. 14309/65. Heading H2J. A starter for an A.C. motor comprises a laminated core having a primary winding in circuit with the motor, and a secondary winding whose ampere-turns are adapted to balance those of the primary winding. Initially, the secondary winding is open-circuited so that t he reactance of the primary winding reduces the motor current. At the end of the starting period, the secondary circuit is closed, whereby the impedance of the primary winding is reduced to a low value. The secondary circuit may comprise a variable impedance. A relay for closing the secondary circuit may be controlled by local or remote push-buttons associated with signal lamps, or time-control of the relay may be provided. A part of the primary winding may be removed at the end of the starting period, the remaining portion cooperating with the secondary winding. The primary and secondary windings may be connected in parallel at the end of the ...

Parallel use of soft starters

Improvements in electric remote control devices

... 927,110. Magnetic amplifiers. W. BROOKE, and H. HOWE. March 22, 1962, No. 11066/62. Addition to 864,714. Class 40 (9). Additional secondary windings DA1, DA2, DB1, DB2 are provided on each pair of reactor cores A, B in the three-phase saturable reactor arrangement described in the parent Specification, the additional windings of each core pair being connected so that the induced voltages act cumulatively, and the three winding groups so formed being connected in a closed delta D to absorb the harmonic content of the current between the power lines L1-L3 and a motor load M. The additional winding circuit is stated to reduce the impedance between the lines and load during starting of the motor and to increase the impedance when switch K is opened to remove the saturating excitation. The additional secondary windings of each group may be connected in series-parallel, as shown, or in series. A three-phase output which is mainly effective when the cores are unexcited may be taken from the delta ...

STARTING AC MOTORS

ELECTRICAL SWITCHGEAR

DEVICE FOR THE REGULATION OF A THREE-PHASE OF ALTERNATING-CURRENT MOTOR, IN PARTICULAR A SHORT CIRCUITED ROTOR ENGINE.

SWITCHING CONFIGURATION FOR THE CONTROLLING OF STARTING AND DECELERATION OF THREE-PHASE ALTERNATING CURRENT SYNCHRONOUS ENGINES AND PROCEDURE FOR THE ENTERPRISE OF A SUCH SWITCHING CONFIGURATION.

NUMBER OF REVOLUTIONS RULE ARRANGEMENT FOR A UEBER CONTROLLABLE ONE SEMICONDUCTOR ELECTRIC RECTIFIER FEEDING THREE-PHASE ALTERNATING CURRENT SYNCHRONOUS ENGINE, IN PARTICULAR A HEBEZEUGES

DISCHARGE OF THE BYPASS SYSTEM OF GENTLE APPROACH DEVICES OF TRANSFERS

DREHZAHL-REGELANORDNUNG FUER EINEN UEBER STEUERBARE HALBLEITERGLEICHRICHTER GESPEISTEN DREHSTROMASYNCHRONMOTOR, INSBESONDERE EINES HEBEZEUGES

Connection apparatus for electric conductors

Variable speed maximum power point tracking, solar electric motor controller for induction and permanent magnet AC motors

Solar Motor Controller is an electronic device with DC power input terminals that may connect directly to solar PV panels, and output terminals that may connect directly to single or multiphase phase AC electric motors without requiring an energy storage subsystem. The Controller runs electric motors of many frequencies and is capable of interfacing to multiple voltages of solar PV panels with or without maximum power point tracking. The Controller may drive motors in water pumping, HVAC, refrigeration, compressors operation, blowers, machine tools, and many other applications; some controller applications may operate at motor speeds adjusted to conform to power available from attached solar panels.

MOTOR POWER FACTOR CONTROLLER WITH A REDUCED VOLTAGE STARTER

MOTOR POWER FACTOR CONTROLLER WITH A REDUCED VOLTAGE STARTER A power factor type motor controller in which the conventional power factor constant voltage command signal is replaced during a 5 to 30 second starting interval with a graduated control voltage. A ramp generator 174 provides an initial ramp-like signal which replaces a constant power factor signal supplied by potentiometer 70. The ramp-like signal is applied to terminal 40 where it is summed with an operating power factor signal from phase detectors 32, 34, and 36 to thereby obtain a control signal for ultimately controlling SCR devices 12, 14, and 16 to effect a gradual turn-on of motor 10. The SCR devices are turned on at an advancing rate with time in response to the summed or combination signal rather than simply as a function of a ramp-like signal alone, to thereby eliminate motor instabilities.

APPARATUS AND THREE PHASE INDUCTION MOTOR STARTING AND STOPPING CONTROL METHOD

Apparatus and three phase induction motor starting and stopping control method The invention refers to an apparatus and starting and stopping control method of three phase induction motors and consists of carrying out the striking of the static switches simultaneously two by two, establishing a synchronization with a determined point of the compound voltage wave corresponding to the phases that are struck, cyclically repeating in the three phases, determining the operating condition in discontinuous conduction, with instants without current in any phase. The apparatus basically comprises some voltage transducers connected between the input and output terminals of the static switches placed in each phase. At least in one of the phases there is a passing by zero detector connected, a striking control device, an electromotive power detector and an intensity transducer connected to the corresponding converter.

Improvement to the motors are operated by single and polyphase [...]

Device with diodes controlled for electrical motors

APPAREIL DE COMMANDE POUR MOTEURS ASYNCHRONES

APPAREIL DE COMMANDE POUR MOTEURS ASYNCHRONES. CET APPAREIL COMPREND UN MOYEN 5 A IMPEDANCE VARIABLE CONNECTE A L'UN DES ENROULEMENTS PRIMAIRES OU SECONDAIRES 3, 6 DU MOTEUR ASYNCHRONE 2, UN PREMIER MOYEN DETECTEUR 7 POUR DETECTER LA PHASE DU COURANT QUI PASSE DANS LE MOTEUR, UN DEUXIEME MOYEN DETECTEUR 8 POUR DETECTER LA PHASE DE LA TENSION APPLIQUEE AU MOTEUR LORSQUE CETTE TENSION ATTEINT UNE VALEUR FIXE PREDETERMINEE, ET UN MOYEN 9 DETECTEUR DE DEPHASAGE QUI COMPARE L'UNE AVEC L'AUTRE LA PHASE DU COURANT ET LA PHASE DE LA TENSION. LE RESULTAT DE CETTE COMPARAISON SERT DE BASE POUR COMMANDER LE MOYEN A IMPEDANCE VARIABLE. APPLICATIONS: NOTAMMENT AU DEMARRAGE DES MOTEURS ASYNCHRONES MONOPHASES ET TRIPHASES ET A LA REGULATION DU FREINAGE PAR INVERSION DES MOTEURS ASYNCHRONES TRIPHASES.

Fittings of order for automatic switchgear

Method for starting the three-phase motors by means of transformers for starting and feedback coil

A SOFTSTARTER FOR CONTROLLING AN ASYNCHRONOUS THREE-PHASE MOTOR

The present invention relates to a softstarter (2) for starting and stopping an asynchronous motor (1) having three phases (L1, L2, L3), comprising two pairs (3A, 3C) of semiconductor devices of the type turning off at zero-crossing of the current therethrough, wherein each of said two pairs of semiconductor devices is connected in anti-parallel, and the first pair of the semiconductor devices is adapted to control the voltage of one of the phases of the motor and the second pair of the semiconductor devices being adapted to control the voltage of another of the phases of the motor, a DC reducing unit (16) associated with said two pairs (3A, 3C) of semiconductor devices for reducing a DC component in a load current of the said asynchronous three-phase motor during start of the motor, a first voltage measuring unit (8A, 8C) for measuring voltages across the two pairs of semiconductor devices, and a first zero-crossing detecting unit (14) configured for detecting zero-crossings of the measured ...

METHOD AND DEVICE FOR AN INDUCTION MOTOR START

An object of the present invention is providing permissible values of start currents with sufficiently high start torque ensuring the possibility of the start of a loaded motor, the smoothness of the motor's start, without spikes and fluctuations of the currents, voltages and torques. The other objects of the proposed device are simplicity, reliability and economic efficiency. The proposed method of an induction motor start includes an acquisition of two components of the voltage, feeding the motor. The both components have the different controlled frequecies and root mean square values. The proposed device for an induction motor start comprises two channels forming signals, which create two corresponding components of the motor's feeding voltage.

OPERATIONALLY DEPENDENT FILTERING FOR SOFT STARTER CURRENT MEASUREMENTS

A system and method for optimizing current filtering in a motor soft starter is disclosed. A motor soft starter includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, with the circuit being operable in a ramping mode and a bypass mode so as to control current flow and terminal voltages in the AC motor. The soft starter includes a controller connected to the circuit to control operation thereof, with the controller including a configurable current filter. The controller determines a current of an AC power provided to the input terminal of the AC motor from the soft starter, identifies a present operational mode of the soft starter as being one of the ramping mode and the bypass mode, and performs filtering on the determined current based on the present operational mode of the soft starter.

Starting device for an electrical asynchronous motor

A starting device for an asynchronous electrical motor of the type possessing a stator winding for each phase and a rotor of low impedance. The device comprises, for each phase, a pair of head-to-tail configured thyristors (2) and a circuit for triggering the latter. This triggering circuit is essentially composed of a ramp generator (5) matched to deliver a ramp signal of amplitude which increases with time, so as to allow the thyristors (2) to be made gradually conductive, as a function of the amplitude of the said ramp signal. ...

Method for limiting of the torque in soft starting of a threephase asynchronous motor

Преобразователь напряжения

Полезная модель относится к области электротехники и может быть использована для реализации плавного пуска асинхронных, синхронных приводных двигателей в составе электропривода общепромышленного исполнения вентиляторов, дымососов, насосов и других механизмов.Устройство включает в себя блоки тиристорные высоковольтные (БТВ) для регулирования фазных напряжений, датчик тока, датчики напряжения на входе и выходе преобразователя напряжения, сетевой и шунтирующий контакторы, ограничители перенапряжения на выходе устройства в каждой фазе, источник напряжения синхронизации, блок импульсно-фазового управления (БИФУ), разрешающий вход БИФУ соединен с одним из выходов блока управления, усилители импульсов с генератором высокочастотных импульсов, импульсные трансформаторы, соединенные с управляющими электродами тиристоров, блок мониторинга, диагностики состояния двигателя и механизма, блок управления, включающий модули защиты, блокировок, сигнализации, блок автоматического регулирования, состоящий из задатчика интенсивности (ЗИ), регулятора напряжения (РН), регулятора тока (РТ), выход регулятора тока (РТ) соединен с управляющим входом БИФУ; блок автоматического регулирования дополнительно снабжен модулем задания напряжения, модулем задания тока, модулем ограничения тока, причем с блока управления на блок задания напряжения двигателя подаются задание на начальное напряжение и задание на напряжение двигателя, выход модуля задания напряжения двигателя соединен со входом задатчика интенсивности, выход которого соединен со входом модуля задания напряжения и со входом регулятора напряжения (РН), причем заданное начальное напряжение на выходе задатчика интенсивности изменяется с форсированной скоростью нарастания, выход регулятора напряжения (РН) соединен с одним из входов задания тока двигателя, другой вход модуля задания тока соединен с одним из выходов блока управления, который задает начальный ток двигателя, выход модуля задания тока двигателя соединен со входом модуля ограничения ...

Softstarter For Controlling An Asynchronous Three-Phase Motor

A softstarter for starting and stopping an asynchronous motor having three phases, including two pairs of semiconductor devices of the type turning off at zero-crossing of the current therethrough, wherein each of the two pairs of semiconductor devices is connected in anti-parallel, and the first pair of the semiconductor devices is adapted to control the voltage of one of the phases of the motor and the second pair of the semiconductor devices being adapted to control the voltage of another of the phases of the motor, a DC reducing unit associated with the two pairs of semiconductor devices, a first voltage measuring unit for measuring voltages across the two pairs of semiconductor devices, and a first zero-crossing detecting unit configured for detecting zero-crossings of the measured voltages across the two pairs of semiconductor devices and providing zero-crossing signals to the DC reducing unit.

Operationally dependent filtering for soft starter current measurements

A system and method for optimizing current filtering in a motor soft starter is disclosed. A motor soft starter includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, with the circuit being operable in a ramping mode and a bypass mode so as to control current flow and terminal voltages in the AC motor. The soft starter includes a controller connected to the circuit to control operation thereof, with the controller including a configurable current filter. The controller determines a current of an AC power provided to the input terminal of the AC motor from the soft starter, identifies a present operational mode of the soft starter as being one of the ramping mode and the bypass mode, and performs filtering on the determined current based on the present operational mode of the soft starter.

CONTROL METHOD FOR VERIFYING THE COMPATIBILITY BETWEEN A VARIABLE SPEED DRIVE AND THE INPUT FILTER

A control method for verifying the compatibility between an input filter and a variable speed drive. The method includes applying a plurality of successive commands so as to define a plurality of operating points of the electric motor, for each operating point, measuring the DC voltage of the bus, comparing the maximum variation in the amplitude of the DC voltage measured for the operating point with a threshold value, defining a new operating point as long as the maximum variation in the amplitude of the DC voltage is lower than the threshold value, determining an operating range including all of the operating points for which the maximum variation in the amplitude of the DC voltage is lower than the threshold value. 1. A control method for verifying the compatibility between an input filter and a variable speed drive , said variable speed drive being connected to an electric power source via said input filter , said variable speed drive comprising , at input , a rectifier stage connected to said input filter , a DC power supply bus connected to said rectifier stage and receiving a DC supply voltage , and , at output , an inverter stage connected to the DC power supply bus and controlled so as to supply a variable voltage to an electric motor , said method comprising:applying a plurality of successive commands so as to define a plurality of operating points of the electric motor,for each operating point:measuring the DC voltage of the bus,comparing the maximum variation in the amplitude of the DC voltage measured for said operating point with a threshold value,defining a new operating point as long as said maximum variation in the amplitude of the DC voltage is lower than said threshold value,determining an operating range comprising all of the operating points for which said maximum variation in the amplitude of the DC voltage is lower than said threshold value.2. The method according to claim 1 , comprising a step of implementing a control path that makes it ...

Soft starter, operating method, and switching system

The invention relates to a soft starter (10) for connecting at least one main circuit (12, 14, 16), each of which includes a bypass circuit (20) having a semiconductor switch (22). Said soft starter (10) comprises a control unit (40) for actuating the bypass circuit (20), and the control unit (40) is equipped with a control signal input (44). According to the invention, the control unit (40) has a separate safety signal input (42).

Variable Voltage Drive using Bidirectional Bipolar Transistors

A Variable Voltage Drive (VVD) with highly efficient Bidirectional Bipolar TRANsistor (“B-TRAN”) improves partial load efficiency of AC induction motors. 1. A method of operating an induction or synchronous motor having multiple terminals , comprising the actions of:a) when the motor is being operated under full load, connecting the terminals successively to respective phases of an AC power input through respective symmetrically-bidirectional bipolar power transistors, without any significant frequency shift or voltage reduction; andb) sometimes, when the motor is being operated under part load, connecting the terminals successively to respective phases of the AC power input, using chopping without any frequency shift to provide a reduced net effective AC voltage; andc) when the motor is being started up, connecting the terminals successively to respective phases of the AC power input through respective symmetrically-bidirectional bipolar power transistors, using chopping to provide a net effective AC voltage, at the same frequency as the AC power input, which is gradually increased as the motor shaft speed increases.2. The method of claim 1 , wherein the AC power input is polyphase.3. The method of claim 1 , wherein action c) is performed only when the motor is being operated at less than 90% of full power.4. The method of claim 1 , wherein action c) is performed only when the motor is being operated at less than 50% of full power.5. The method of claim 1 , wherein the chopping comprises phase angle modulation.6. The method of claim 1 , wherein the chopping comprises a pulse train.7. The method of claim 1 , wherein the motor is a synchronous machine.8. The method of claim 1 , wherein the motor is an induction motor.9. The method of claim 1 , wherein the AC power input is medium voltage.10. The method of claim 1 , wherein the AC power input is three-phase claim 1 , and the motor has a number of terminals which is an integer multiple of 3.11. A method of operating an ...

ACCELERATION METHOD FOR V/F CONTROLLED INDUCTION MOTOR IN FLUX-WEAKENING REGION

The present invention provides an acceleration method for V/f controlled induction motor in flux-weakening region, which comprises: acquiring no-load magnetizing current Iof the induction motor at current stator frequency; selecting a smaller one of 0.5·I(1/σ+1) and (I+σ)/(I+σI) as magnetizing current set point, in which σ is an estimated total leakage inductance coefficient; getting an error signal by subtracting the magnetizing current of the induction motor from the magnetizing current set point; determining the stator frequency for the next control period according to the error signal which is provided as a controlling variable of negative feedback. The acceleration method of the present invention can provide the maximum output torque in flux-weakening region and has a larger tolerance for the error of the estimated leakage inductance. 116-. (canceled)17. An acceleration method for a V/f controlled induction motor in a flux-weakening region comprising:{'sub': 'm', 'acquiring a no-load magnetizing current Iof the V/f controlled induction motor at a current stator frequency;'}{'sub': m', 'm', 'm', 'm, 'sup': '2', 'selecting a smaller one of 0.5·I(1/σ+1) and (I+σ)/(I+σI) as a magnetizing current set point, in which a is an estimated total leakage inductance coefficient;'}acquiring an error signal by subtracting a magnetizing current of the V/f controlled induction motor from the magnetizing current set point, wherein the error signal is provided as a controlling variable of negative feedback; anddetermining a stator frequency for a next control period according to the error signal.18. The acceleration method of further comprising:determining a stator frequency acceleration value as a controlled variable according to the error signal; anddetermining a stator frequency for the next control period according to the stator frequency acceleration value.19. The acceleration method of further comprising setting the stator frequency for the next control period as a ...

METHOD FOR ACTUATING A MOTOR FOR STARTING A MILL

In a method for actuating a motor for starting up a mill containing material to be ground, the motor for triggering sedimentation of the material to be ground in the mill is initially fed by a first inverter. The motor is subsequently disconnected from the first inverter, and in a further step the motor is connected to a first supply which has a first supply voltage. The maximum output voltage of the first inverter is lower than the first supply voltage. 115.-. (canceled)16. A method for controlling a motor for starting a mill containing material to be ground , said method comprising:feeding the motor by a first converter to remove any sedimentation of the material to be ground in the mill;disconnecting the motor from the first converter; andconnecting the motor to a first supply having a first supply voltage, wherein a maximum output voltage of the first converter is lower than the first supply voltage.17. The method of claim 16 , wherein the maximum output voltage of the first converter is defined as max. 50% of the first supply voltage of the first supply.18. The method of claim 16 , further comprising operating the motor at a constant rated frequency while connected to the first supply claim 16 , with the rated frequency being greater than a maximum output frequency of the first converter.19. The method of claim 18 , wherein the maximum output frequency of the first converter is defined as max. 30% of the rated frequency of the first supply.20. The method of claim 16 , further comprising operating the first converter from a second supply providing a second supply voltage.21. The method of claim 16 , further comprising connecting the motor to a second converter claim 16 , after disconnecting the motor from the first converter and prior to connecting the motor to the first supply claim 16 , with the second converter having a maximum output voltage which corresponds to the first supply voltage.22. The method of claim 21 , further comprising synchronizing the motor ...

APPARATUS AND MEANS FOR STARTING OF AC MOTORS, ALGORITHM FOR SELF-ADAPTING MOTOR START WITH SOFT-STARTER

The invention relates to a method of starting an electric motor () powered by an alternating power supply voltage, said method consisting of supplying current to the motor () with a delay t, during each period of the power supply voltage. The starting method comprises a first sequence in which the following steps are carried out during each nperiod of the power supply voltage, where n is an integer number greater than 0: a) determine the value of a variation of a resistance of the electric motor during the previous n periods of the power supply voltage; b) compare said value of the variation of the determined motor resistance with a first threshold resistance value; c) if the value of the variation of the motor resistance is less than the first threshold value, reduce t. The invention also relates to a starter device and a computer program. 1. A starting Method of an electric motor powered by an alternating power supply voltage of an alternating power supply circuit , the starting method consisting of supplying current to the electric motor during each voltage supply period with a delay t , the starting method comprising a first sequence in which the following steps are carried out in each nperiod of the alternating power supply voltage , where n is an integer number greater than 0:a) determine a value of a variation of an electric motor resistance during a previous n periods of the alternating power supply voltage,b) compare the determined value of the variation of the electric motor resistance with a first threshold resistance value,{'sub': 'ret', 'c) if the value of the determined value of the variation of the electric motor resistance is less than the first threshold value, reduce the delay t.'}41. The starting method according to claim 1 , wherein steps a) to c) are applied after an initial duration t.52. The starting method according to claim 1 , wherein after a reduction in the delay t claim 1 , the first sequence is repeated after a waiting time t.6. The ...

Motor starter and method for starting an electric motor

A motor starter and a method for starting an electric motor are disclosed. In an embodiment, the motor starter includes a phase gating unit and a control unit. The phase gating unit is configured to be deactivated via the control unit after an activity period of the phase gating unit has elapsed and is configured to be deactivated during operation after the activity period has elapsed.

Method And Device For Reducing The Influence Of A DC Component In A Load Current Of An Asynchronous Three-Phase Motor

A method for reducing the influence of a DC component in a load current of an asynchronous three-phase motor, in which the voltages of two of the three phases are controlled by adjusting firing angles of semiconductor devices of the type turning-off at zero-crossing of the current therethrough comprises the steps carried out for each said controlled phase: detecting turn-off times of the semiconductor devices, calculating a value of a change of firing angle of the semiconductor devices needed for changing the length of the time period between two subsequent turn-off times for compensating for the influence of a DC component, and determining the firing angle of said semiconductor devices in dependence of the result of this calculation.

Apparatus for controlling inverter

인버터 제어장치가 개시된다. 본 발명의 장치는, 초기기동시 소정 제1보상전압을 지령전압으로 결정하여 상기 인버터에 제공하는 지령전압 결정부, 상기 인버터의 출력전류를 동기좌표계상의 q축 전류로 변환하는 변환부, 및 상기 q축 전류로부터 제2보상전압을 결정하여 상기 지령전압 결정부에 제공하는 보상전압 결정부를 포함한다. An inverter control device is disclosed. The apparatus of the present invention includes a command voltage determining unit for determining a predetermined first compensation voltage as a command voltage and providing the inverter to the inverter at initial startup, a converter for converting an output current of the inverter into a q-axis current on a synchronous coordinate system, and and a compensation voltage determination unit determining a second compensation voltage from the q-axis current and providing the second compensation voltage to the command voltage determination unit.

AC motor control

An energy-saving control for an A.C. motor operates to feed a high average value of voltage to the motor during a starting period of predetermined duration and after a predetermined time to automatically switch the voltage supplied the motor to a lower average voltage of substantially fixed value. This lower value of average voltage is determined without feedback to the control circuit. The control circuit is simple, reliable and inexpensive. It may be designed for use with single phase or multiple phase motors and for motors of various different power ratings.

用于运行三相电机的方法

本发明涉及一种用于运行三相电机的方法。本发明涉及一种用于运行三相电机(1)、特别是永磁激励的同步电机的方法，三相电机具有转子(L)和与三相电网连接的定子(St)，定子具有三相定子绕组，其中，定子经由第一半导体电路装置并且经由第二半导体电路装置与三相电网连接，第一半导体电路装置用于在定子中形成在第一旋转方向上旋转的第一旋转场，并且第二半导体电路装置用于在定子中形成在与第一旋转方向相反的旋转方向上旋转的第二旋转场，其中，三相电机还具有控制单元(3)，控制单元用于调节第一和第二半导体电路装置的半导体，其中，控制单元调节半导体，使得通过第一和第二旋转场的电流脉冲，使转子在第一旋转方向上加速。

可変速誘導電動機の始動方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Controller for induction motor

Device for soft start control and shutdown of three-phase electric motors (soft starter)

FIELD: electricity. SUBSTANCE: invention is related to device for soft start control or shutdown of three-phase electric motors (1), so called soft starter, boosted for start of heavy mechanical, electric and hydraulic drives. Control device comprises at least one switching cell (3), which includes at least three-phase power unit (4), power electronic devices related to it (5), and also required contactors. Switchboard cell (3) is arranged in switchboard cabinet (2) and in frame (7) with walls (3b) that surround switchboard cell and with attachment of pedestal insulators (28) in mount direction (26), which are arranged in the form of a single unit with the possibility of easy withdrawal forward and insertion back without attachment to back or side wall (8) of switchboard cabinet (2). Disconnector (9) is fixed to wall of cabinet (2) and is arranged with the possibility of connection to contact (10) of busbar in process of rolling-in or disconnection from it when rolled out by means of insert contact connection (10a). EFFECT: saving of area and improved servicing of one or several devices. 14 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 382 459 (13) C1 (51) МПК H02B 1/32 (2006.01) H02B 1/36 (2006.01) H02B 13/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2008124959/09, 23.06.2008 (24) Дата начала отсчета срока действия патента: 23.06.2008 (73) Патентообладатель(и): ЗИМЕС Андреас (DE) R U (30) Конвенционный приоритет: 29.06.2007 DE 102007030344.2 (72) Автор(ы): ЗИМЕС Андреас (DE) (45) Опубликовано: 20.02.2010 Бюл. № 5 C 1 2 3 8 2 4 5 9 (54) УСТРОЙСТВО ДЛЯ КОНТРОЛЯ ПЛАВНОГО ПУСКА И ОСТАНОВКИ ТРЕХФАЗНЫХ ЭЛЕКТРОДВИГАТЕЛЕЙ (СОФТСТАРТЕР) (57) Реферат: Изобретение относится к устройству для контроля плавного пуска или остановки трехфазных электродвигателей (1), так называемому софтстартеру, предвключенному для запуска тяжелых механических, электрических и гидравлических ...

Method for reducing the influence of a DC component in the load current of an asynchronous motor

Um mit geringem Aufwand den Laststrom und demnach das Lastmoment eines über einen zweiphasigen Thyristor-Drehstromsteller mit Phasenanschnitt gesteuerten Asynchronmotors im Sinne eines Sanftanlaufs beeinflussen zu können, ist gemäß eines ersten Verfahrens vorgesehen, in den gesteuerten Phasen (L¶1¶ und L¶2¶) den Zündzeitpunkt (t¶Ign+1¶) im Sinne einer Angleichung der Stromflusswinkel der folgenden Stromhalbwellen zu bestimmen einerseits und gemäß eines zweiten Verfahrens, in beiden gesteuerten Phasen (L¶1¶ und L¶2¶) den Zündzeitpunkt (t¶Ign¶) der folgenden Stromhalbwellen vorzulegen andererseits.

Device for starting and compensation of asynchronous motor reactive power

FIELD: electrical engineering. SUBSTANCE: in starting mode of motor winding (2-4) are connected in series with capacitors (5-7) and form a triangle. In steady state contacts (9-11) are closed, therefore, motor windings (2-4) and capacitors are assembled into separate triangles. EFFECT: invention can be used in electric drive. 1 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 706 716 C1 (51) МПК H02P 1/28 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ На основании пункта 1 статьи 1366 части четвертой Гражданского кодекса Российской Федерации патентообладатель обязуется заключить договор об отчуждении патента на условиях, соответствующих установившейся практике, с любым гражданином Российской Федерации или российским юридическим лицом, кто первым изъявил такое желание и уведомил об этом патентообладателя и федеральный орган исполнительной власти по интеллектуальной собственности. (52) СПК (21)(22) Заявка: 2019114937, 16.05.2019 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Джус Илья Николаевич (RU) Дата регистрации: 20.11.2019 (56) Список документов, цитированных в отчете о поиске: RU 2288534C1, 27.11.2006. SU 128491A1, 10.10.1960. DE 10029549B4, 18.03.2004. Приоритет(ы): (22) Дата подачи заявки: 16.05.2019 (54) Устройство для пуска и компенсации реактивной мощности асинхронного двигателя (57) Реферат: Изобретение относится к электротехнике и 7) и образуют треугольник. В установившемся может быть использовано в электроприводе. В режиме замыкаются контакты (9-11), поэтому пусковом режиме обмотки (2-4) двигателя обмотки (2-4) двигателя и конденсаторы включены последовательно с конденсаторами (5собираются в отдельные треугольники. 1 ил. R U 2 7 0 6 7 1 6 Адрес для переписки: 109548, Москва, ул. Полбина, 24, кв. 108, Джус Илья Николаевич Стр.: 1 C 1 C 1 (45) Опубликовано: 20.11.2019 Бюл. № 32 2 7 0 6 7 1 6 16.05.2019 (72) Автор(ы): Джус Илья Николаевич (RU) R U H02P 1/28 (2019.08) C 1 C 1 ...

Motor control device and method

Method of smooth start of asynchronous motor with squirrel-cage rotor

FIELD: electricity. SUBSTANCE: method of asynchronous motor control with the squirrel-cage rotor is that the control signal for the pulse-phase control system of the thyristor converter is formed by continuous measuring the residual voltage on the network buses and comparing it with a predetermined value of this voltage, in the deviation from which the control signal is corrected, while maintaining a constant residual voltage on the network bus during the start-up; the voltage drop across the thyristors is measured and compared with a predetermined value, after which, after a predetermined time, a Stop command is generated, ensuring the motor cut off during a prolonged or unsuccessful start-up. EFFECT: prevention of engine failure with a prolonged or failed start, if it was not completed after a predetermined time. 1 dwg С 2 2625807 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (11) *\ < 55 хе 5% зо ВО > У. < о — ца $ С2 (51) МПК НО2Р 1/26 (2006.0Т) НО2Р 1/28 (2006.01) (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016101027, 14.01.2016 (24) Дата начала отсчета срока действия патента: 14.01.2016 Дата регистрации: 19.07.2017 Приоритет(ы): (22) Дата подачи заявки: 14.01.2016 (43) Дата публикации заявки: 17.07.2017 Бюл. № 20 (45) Опубликовано: 19.07.2017 Бюл. № 20 Адрес для переписки: 301650, Тульская обл., г. Новомосковск, ул. Октябрьская, 12, кв. 25, Колесникову Евгению Борисовичу (72) Автор(ы): Колесников Ёвгений Борисович (КП) (73) Патентообладатель(и): Колесников Ёвгений Борисович (КП) (56) Список документов, цитированных в отчете о поиске: ВО 2497267 С1, 27.10.2013. ВО 2192703 СТ, 10.11.2002. ВО 2256285 СТ, 10.07.2005. ВУ 10546 СТ, 30.04.2008. СВ 2110488, 15.06.1983. 05 8138702 В2, 20.03.2012. СМ 102656794 В, 24.12.2014. \УО 2008033088 А1, 20.03.2008. (54) СПОСОБ ПЛАВНОГО ПУСКА АСИНХРОННОГО ДВИГАТЕЛЯ С КОРОТКОЗАМКНУТЫМ РОТОРОМ (57) Реферат: Изобретение относится К области электротехники и может быть использовано для ...

METHOD FOR SOFT STARTING OF ASYNCHRONOUS MOTOR WITH SHORT-CLOSED ROTOR

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2016 101 027 A (51) МПК H02P 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2016101027, 14.01.2016 (71) Заявитель(и): Колесников Евгений Борисович (RU) Приоритет(ы): (22) Дата подачи заявки: 14.01.2016 (43) Дата публикации заявки: 17.07.2017 Бюл. № 20 (72) Автор(ы): Колесников Евгений Борисович (RU) A 2 0 1 6 1 0 1 0 2 7 R U Стр.: 1 A (57) Формула изобретения Способ плавного пуска асинхронного двигателя с короткозамкнутым ротором, заключающийся в подаче трехфазного напряжения на статорные обмотки асинхронного двигателя от шин сети через три пары встречно-параллельно включенных тиристоров, управляемых от синхронизированной по напряжению сети системы импульсно-фазового управления, на вход которой по команде «Пуск» подают предварительно сформированный сигнал управления, эквивалентный углу открывания тиристоров, причем сигнал управления формируют путем непрерывного измерения остаточного напряжения на шинах сети и сравнения его с предварительно заданным значением этого напряжения, при отклонении от которого сигнал управления корректируют, поддерживая постоянным остаточное напряжение на шинах сети в процессе пуска, отличающийся тем, что в процессе пуска дополнительно измеряют падение напряжения на тиристорах и сравнивают его с предварительно заданным значением, при превышении которого по прошествии предварительно заданного времени формируют команду "Стоп", обеспечивая отключение двигателя при затяжном или несостоявшемся пуске. 2 0 1 6 1 0 1 0 2 7 (54) СПОСОБ ПЛАВНОГО ПУСКА АСИНХРОННОГО ДВИГАТЕЛЯ С КОРОТКОЗАМКНУТЫМ РОТОРОМ R U Адрес для переписки: 301650, Тульская обл., г. Новомосковск, ул. Октябрьская, 12, кв. 25, Колесникову Евгению Борисовичу

Inverter control device

一种用于控制逆变器的设备包括指令电压确定电路部分，其被配置为在初始起动时确定预定的第一补偿电压作为指令电压并向逆变器提供该指令电压；转换电路部分，其被配置为将逆变器的输出电流转换成同步参考坐标系上的转矩分量电流；以及补偿电压确定电路部分，其被配置为基于q轴电流来确定第二补偿电压并向指令电压确定电路部分提供该第二补偿电压。

A kind of online soft starting device of motor

本发明提供一种在线软启动装置，包括壳体，设于壳体上的显示器，设于壳体内并与显示器通信连接的主控器，设于壳体上并与电机相连的功率驱动器，其特征在于主控器包括主控CPU、驱动发生器，以及分别与主控CPU、驱动发生器相连的触发驱动器，该触发驱动器与驱动输出器相连，驱动输出器与功率驱动器相连，和分别与主控CPU、驱动发生器相连的缺相检测器、过零检测器及过流检测器，缺相检测器、过零检测器及过流检测器与功率驱动器的三相交流电输入端相连，与主控CPU相连的触发控制器，该触发控制器与触发驱动器相连。可对软启动的开启、停止以及整个软启动过程、缺相、过零或/和过流，温度、电压、电流进行监控，确保电机安全。支持手机、IPAD、MODBUS等网络通信。

Soft start system for an electric machine

用于由电网(1)供给的电机(M)的启动系统，该启动系统包括电子控制电路(7)和用于控制电机(M)的一个相的电子开关(10)，该电子开关(10)由控制电路(7)控制。该启动系统包括：意在传送表示流过该电机(M)的该相的电流的导数的模拟信号(4)的传感器(3)；检测板(5)，该检测板(5)包括用于将所述模拟信号(4)变换为表示所述模拟信号的符号改变的二进制信号(6)的部件并且包括用于将所述二进制信号发送至控制电路(7)以便优化对电子开关(10)的控制的部件。

Softstarter for controlling asynchronous three-phase motor

本发明涉及用于启动和停止具有三相(L 1 ，L 2 ，L 3 )的异步电动机(1)的软启动器(2)，包括：两对(3A，3C)半导体器件，这种类型的半导体器件在流过的电流的过零处关断，其中每个所述两对半导体器件被反并联地连接，第一对半导体器件适于控制电动机的一相的电压，和第二对半导体器件适于控制电动机的另一相的电压；与所述两对(3A，3C)半导体器件相关联的直流减小单元(16)，用于减小在电动机的启动期间在所述三相异步电动机的负荷电流中的直流分量；第一电压测量单元(8A，8C)，用于测量在所述两对半导体器件上的电压，以及第一过零检测单元(14)，被配置成检测在所述两对(3A，3C)半导体器件上的测量的电压的过零，并将过零信号(X1，X3)提供到直流减小单元。

Laser diode triggered soft start controller for a polyphase electric motor

A solid state soft start controller system (10) has a power supply (20), an electric motor (34), a thyristor (18) electrically interconnected between the power supply (20) and the electric motor (34) so as to selectively allow current to pass from the power supply (20) to the phases of the electric motor, a laser diode (14) optically connected to the thyristor (18), and a controller (12) connected to the laser diode (14) for triggering the laser diode (14). Separate thyristors are connected to each phase of the polyphase electric motor. Separate laser diodes and associated light pipes connect the laser diode to the separate thyristors.

METHOD FOR CONTROLLING A CONTROL SWITCH CONTROLLING THE POWER SUPPLY OF AN ELECTRIC MOTOR

Three phase motor speed control - is for motors of less than one horse power and uses triac connected into one phase only

The Triac is connected into one phase only of the supply to the motor which is governed by a normal circuit breaker. The angle of trip of the Triac can be manually or automatically controlled by a potentiometer. When the motor is first switched on with two phases only connected, the motor is stationary but as the controlled Triac opens the third phase is progressively fed. The Triac may be switched out of circuit when the operating speed has been achieved. This control is limited to motor of 1 HP or less but overcomes the difficulties of small resistor control units especially when the run-up time of the motor is appreciable.

Async. squirrel cage motor starting and brake control - connects rectified third phase to motor converter second phase input for braking

METHOD FOR CONTROLLING A DIMMER AND DEVICE FOR CARRYING OUT SAID METHOD

Procédé de commande d'une charge, telle qu'un moteur, au moyen d'un gradateur (1) relié d'une part à un réseau alternatif à fréquence fixe, d'autre part au moteur, et comprenant des interrupteurs statiques associés à au moins une phase du moteur et pilotés par un circuit de commande (2), caractérisé en ce que le couple électromagnétique (Cm ) du moteur est asservi à une valeur de consigne (Ccons ) variable dans l'étape de démarrage ou de décélération du moteur. Method of controlling a load, such as a motor, by means of a dimmer (1) connected on the one hand to an AC network at fixed frequency, on the other hand to the motor, and comprising static switches associated with at least one phase of the motor and controlled by a control circuit (2), characterized in that the electromagnetic torque (Cm) of the motor is slaved to a variable value (Ccons) in the starting or deceleration stage of the motor engine.

PROGRESSIVE STARTING SYSTEM OF AN ELECTRIC MOTOR

Starter for squirrel cage induction motor

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Patent FR2354658B1

CONTROL APPARATUS FOR ASYNCHRONOUS MOTORS

APPAREIL DE COMMANDE POUR MOTEURS ASYNCHRONES. CET APPAREIL COMPREND UN MOYEN 5 A IMPEDANCE VARIABLE CONNECTE A L'UN DES ENROULEMENTS PRIMAIRES OU SECONDAIRES 3, 6 DU MOTEUR ASYNCHRONE 2, UN PREMIER MOYEN DETECTEUR 7 POUR DETECTER LA PHASE DU COURANT QUI PASSE DANS LE MOTEUR, UN DEUXIEME MOYEN DETECTEUR 8 POUR DETECTER LA PHASE DE LA TENSION APPLIQUEE AU MOTEUR LORSQUE CETTE TENSION ATTEINT UNE VALEUR FIXE PREDETERMINEE, ET UN MOYEN 9 DETECTEUR DE DEPHASAGE QUI COMPARE L'UNE AVEC L'AUTRE LA PHASE DU COURANT ET LA PHASE DE LA TENSION. LE RESULTAT DE CETTE COMPARAISON SERT DE BASE POUR COMMANDER LE MOYEN A IMPEDANCE VARIABLE. APPLICATIONS: NOTAMMENT AU DEMARRAGE DES MOTEURS ASYNCHRONES MONOPHASES ET TRIPHASES ET A LA REGULATION DU FREINAGE PAR INVERSION DES MOTEURS ASYNCHRONES TRIPHASES. CONTROL UNIT FOR ASYNCHRONOUS MOTORS. THIS APPARATUS INCLUDES A 5 MEANS WITH VARIABLE IMPEDANCE CONNECTED TO ONE OF THE PRIMARY OR SECONDARY WINDINGS 3, 6 OF THE ASYNCHRONOUS MOTOR 2, A FIRST MEANS OF DETECTOR 7 TO DETECT THE PHASE OF THE CURRENT FLOWING IN THE MOTOR, A SECOND MEANS OF DETECTOR 8 FOR DETECT THE PHASE OF THE VOLTAGE APPLIED TO THE MOTOR WHEN THIS VOLTAGE REACHES A PREDETERMINED FIXED VALUE, AND A MEAN 9 DETECTOR THAT COMPARES THE CURRENT PHASE AND THE VOLTAGE PHASE WITH EACH OTHER. THE RESULT OF THIS COMPARISON IS USED AS A BASIS FOR ORDERING THE MEANS WITH VARIABLE IMPEDANCE. APPLICATIONS: ESPECIALLY FOR STARTING SINGLE-PHASE AND THREE-PHASE ASYNCHRONOUS MOTORS AND INVERSION BRAKING REGULATION OF THREE-PHASE ASYNCHRONOUS MOTORS.

STARTING DEVICE FOR ROTOR MOTORS IN SINGLE-PHASE OR POLY-PHASE SHORT-CIRCUIT

Dispositif de démarrage pour moteurs à rotor en court-circuit monophasés ou polyphasés. Pour obtenir un démarrage doux d'un moteur à rotor en court-circuit à courant triphasé Ml, M2, M3, on connecte à l'un au moins des conducteurs reliant le moteur au réseau, un enroulement d'une inductance à noyau de fer 1 avec entrefer et deux enroulements 6, 7 dont le second 7 est connecté à un régulateur de courant alternatif ou de courant triphasé 8. Starting device for single-phase or polyphase short-circuited rotor motors. To obtain a soft start of a motor with a short-circuited rotor with three-phase current M1, M2, M3, a winding of an iron core inductor is connected to at least one of the conductors connecting the motor to the network. 1 with air gap and two windings 6, 7 of which the second 7 is connected to an alternating current or three-phase current regulator 8.

ASYNCHRONOUS MOTOR FOR TRAINING BUILDING CLOSURE SYSTEM

Moteur asynchrone pour entraînement de système de fermeture de bâtiment, de type volet roulant comportant un enroulement principal (2) et un enroulement secondaire (3).Moteur caractérisé par le fait qu'il comporte, en combinaison, un dispositif de variation de vitesse (5) à commande scalaire conçu apte à assurer un rapport tension efficace sur fréquence Veff/f constant sur au moins une plage déterminée de la variation. Asynchronous motor for a building closure system drive, roller shutter type comprising a main winding (2) and a secondary winding (3) .A motor characterized in that it comprises, in combination, a speed variation device ( 5) designed scalar control capable of ensuring a ratio of effective voltage on frequency Veff / f constant over at least a determined range of variation.

Patent FR561836A

APPARATUS FOR CONTROLLING AN ELECTRIC MOTOR

Device for starting AC motors

ASYNCHRONOUS MOTOR FOR TRAINING BUILDING CLOSURE SYSTEM

Optimum power supply of an electric motor.

La présente invention concerne un procédé d'alimentation optimale d'un moteur électrique à courant alternatif piloté par un convertisseur statique de fréquence continu/alternatif et alternatif/continu/alternatif, ainsi qu'un dispositif mettant en œuvre ce procédé. Ce procédé d'alimentation optimale d'une charge (23; 125) à caractère inductif couplée à une application (27), cette charge (23; 125) étant pilotée par un convertisseur statique (124) commandé par un module électronique (123), constituant le dispositif électronique de commande de la charge, est caractérisé en ce qu'il délivre à tout instant à la charge (23, 125), par l'intermédiaire de paramètres de réglage (26) appliqués aux commandes du convertisseur (22, 24), une tension (Um) par constat du sens de variation autour d'un extremum correspondant à une puissance minimale absorbée par la charge (23; 125), d'un ou plusieurs paramètres de contrôle (PC) pondérés et/ou combinés entre eux. Le procédé d'alimentation optimale ainsi que le dispositif le mettant en œuvre selon la présente invention s'appliquent à tous les types de charges à caractère inductif.

ELECTRIC MOTOR CONTROL WITH ALTERNATING CURRENT

L'INVENTION CONCERNE LES COMMANDES DE MOTEURS ELECTRIQUES A COURANT ALTERNATIF. ELLE SE RAPPORTE A UNE COMMANDE DANS LAQUELLE UN CIRCUIT 16 A RETARD COMMANDE UN CIRCUIT 18 DE COMMUTATION AYANT DES COMMUTATEURS 24A ET 24B. SELON L'INVENTION, APRES LA FERMETURE DU COMMUTATEUR 14, LE CIRCUIT 16 A RETARD COMMANDE LA TRANSMISSION D'UNE TENSION MOYENNE ACCRUE AU MOTEUR 12 ET, APRES L'ECOULEMENT DU RETARD VOULU, IL OUVRE LE COMMUTATEUR 24A ET FERME LE COMMUTATEUR 24B SI BIEN QUE LE MOTEUR 12 RECOIT UNE TENSION MOYENNE PLUS FAIBLE. APPLICATION A LA REDUCTION DE L'ENERGIE CONSOMMEE PAR LES MOTEURS ELECTRIQUES A COURANT ALTERNATIF. THE INVENTION CONCERNS CONTROLS OF ALTERNATIVE CURRENT ELECTRIC MOTORS. IT RELATES TO A COMMAND IN WHICH A DELAY CIRCUIT 16 CONTROLS A SWITCHING CIRCUIT 18 HAVING SWITCHES 24A AND 24B. ACCORDING TO THE INVENTION, AFTER THE CLOSING OF THE SWITCH 14, THE DELAY CIRCUIT 16 CONTROLS THE TRANSMISSION OF AN INCREASED AVERAGE VOLTAGE TO THE MOTOR 12 AND, AFTER THE EXPECTED DELAY, OPENS THE SWITCH 24A AND CLOSES THE SWITCH 24B IF ALTHOUGH MOTOR 12 RECEIVES LOWER AVERAGE VOLTAGE. APPLICATION TO THE REDUCTION OF ENERGY CONSUMED BY ALTERNATIVE CURRENT ELECTRIC MOTORS.

Patent FR2303409B1

System and method for fast start-up of an induction motor

A system for controlling operation of a motor drive during fast start-up of an induction motor includes an AC motor drive having a PWM inverter and a control system to generate a command signal to cause the PWM inverter to control an output of the AC motor drive. The control system includes a start-up modulator that is selectively operable during start-up acceleration of the AC motor, the start-up modulator programmed to determine a motor current applied to the AC motor and a voltage of a DC bus, generate a first frequency offset that causes a frequency reference of the command signal to be decreased when the motor current is greater than a reference current threshold, and generate a second frequency offset that causes the frequency reference of the command signal to be increased when the DC bus voltage is greater than a reference voltage threshold.

Control circuit for polyphase electric motor

Electronic switching devices (IS1, IS2), inserted in two (L1, L3) of the 3-supply phase connections, each comprise two thyristors (Th1, Th2, Th3, Th4) in inverse parallel, with shunt connections completed through the paired contacts (P1, P2) of a 4-pole contactor (S) operated, like the thyristor firings, by a controller (C). The latter includes a voltage generator (1), whose output is fed to the contactor control unit (2) and to synchronous (3) and asynchronous (4) pulse generators providing thyristor firing via an ignition unit (5). During starting, the controlling voltage (1) exhibits a falling characteristic. Firing pulses (3) are applied in synchronism with the supply wave-form, causing the effective motor terminal voltage to rise steadily from zero. At a preset control voltage threshold, asynchronous pulses replace the synchronous; when a second threshold is reached the controller closes the shunt contactor. Asynchronous pulses continue to be applied during the period, which then begins, of normal running. At shut-down, the contactor is opened and the reverse pulse sequence is applied during deceleration.

Starting method for motor

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

"CONTROL FOR AN AC MOTOR"

METHOD AND DEVICE FOR CONTROLLING AN ELECTRIC MOTOR WITH THREE-PHASE POWER SUPPLY

ENGINE CONTROL SET AND DEVICE

A control system for a three-phase motor has two triac switches connected in respective supply lines to the motor. Both switches are initially closed so that power is supplied to the motor on all three lines. After a predetermined time, when the motor has reached its operating speed, one switch is opened by a logic unit so that single phase power is supplied to the motor on two lines. One of the switches is subsequently periodically closed for short intervals, and the other switch is periodically opened for short intervals under control of a monostable unit, so as to produce hunting of the motor. Hunting of the motor is detected by a speed monitor responsive to the counter EMF of the motor. The system has a phase detector responsive to the phase relationship between signals on the supply lines which prevents the switches being closed if there is not the desired phase relationship between the signals.

Motorized system for closing a building

本发明涉及一种用于封闭建筑物的卷帘型移动系统，其特征在于具有两相异步电机，该电机拥有两个绕组(2、3)并与变速装置(5)相关联。

System and method for fast start-up of an induction motor

Soft start a c motor control

A soft start control for a delta-connected motor or an ungrounded Y-connected (star-connected) motor or the like polyphase system. To reduce the accelerating torque of a polyphase motor and thereby obtain a soft start characteristic that reduces stress and strain on the driven parts until normal running speed is reached, a gated A.C. switching device such as a triac is used in the power lines of the polyphase A.C. source. A simple time delay firing circuit connected across each triac controls the latter so that current flow is interrupted in each of the phases for a predetermined period of time during each half-cycle in repetitive sequence, the net effect being to reduce the effective voltage applied to the motor. After a predetermined time of reduced voltage acceleration sufficient to bring the motor up to or near running speed, a timer controls the firing circuit to apply full line voltage to the motor.

Motor starter apparatus using independently rackable reduced voltage soft starter assembly

A motor starter apparatus includes an enclosure, a bypass contactor configured to be installed in the enclosure and configured to selectively couple a power source to a motor, and a reduced voltage soft starter (RVSS) circuit assembly (e.g. a wheeled truck) configured to be installed in the enclosure, to be coupled to the power source and to apply a variable voltage to the motor. The bypass contactor is configured to preserve a connection of the bypass contactor to the power source and the motor when the RVSS circuit assembly is removed from the enclosure.

Device for controlling the power supply of an electric motor or other alternating current electric device

Control device for refrigerator

一种制冷机控制装置，包括由逆变器驱动的压缩机，还包括：检测上述压缩机的电流的电流检测装置以及基于该电流检测装置的检测结果控制上述压缩机操作的控制装置；上述控制装置借助于上述压缩机的起动信号，施加不能驱动该压缩机的程度的给定频率及给定电压，根据上述电流检测装置的检测结果判断该施加后是否已驱动上述压缩机，基于该判断结果控制上述压缩机的运转频率。

Optimal power supply for electric motor

Operationally dependent filtering for soft starter current measurements

A system and method for optimizing current filtering in a motor soft starter is disclosed. A motor soft starter includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, with the circuit being operable in a ramping mode and a bypass mode so as to control current flow and terminal voltages in the AC motor. The soft starter includes a controller connected to the circuit to control operation thereof, with the controller including a configurable current filter. The controller determines a current of an AC power provided to the input terminal of the AC motor from the soft starter, identifies a present operational mode of the soft starter as being one of the ramping mode and the bypass mode, and performs filtering on the determined current based on the present operational mode of the soft starter.

System and method for fast start-up of an induction motor

Slow start control device for three-phase induction motor

PROGRESSIVE STARTING SYSTEM OF AN ELECTRIC MOTOR

Système de démarrage d'un moteur électrique (M) alimenté par un réseau électrique (1), le système de démarrage comprenant un circuit électronique de commande (7) et un interrupteur électronique (10) de commutation pour piloter une phase du moteur (M), l'interrupteur électronique (10) étant commandé par le circuit de commande (7). Le système de démarrage comporte un capteur (3) destiné à fournir un signal analogique (4) représentatif de la dérivée d'un courant circulant dans la phase du moteur (M), une carte de détection (5) comprenant des moyens de transformation dudit signal analogique (4) en un signal binaire (6) représentatif des changements de signe dudit signal analogique, et comprenant des moyens de transmission dudit signal binaire au circuit de commande (7), de façon à optimiser la commande de l'interrupteur électronique (10). Starting system of an electric motor (M) powered by an electrical network (1), the starting system comprising an electronic control circuit (7) and an electronic switching switch (10) for controlling a motor phase (M ), the electronic switch (10) being controlled by the control circuit (7). The starting system comprises a sensor (3) for supplying an analog signal (4) representative of the derivative of a current flowing in the motor phase (M), a detection card (5) comprising means for transforming said analog signal (4) in a binary signal (6) representative of the sign changes of said analog signal, and comprising means for transmitting said binary signal to the control circuit (7), so as to optimize the control of the electronic switch ( 10).

Method for controlling the starting of an ac induction motor

A method is provided for controlling the starting of an AC induction motor (12) with a soft starter (14). The windings (20a-20c) are connected in a delta configuration and each winding has a corresponding thyristor switch (22a-22c) connected in series therewith such that each winding (20a-20c) and thyristor switch (22a-22c) combination is connected between two corresponding terminals (13a-13c) of the AC induction motor (12). Alpha control of the thyristor switches (22a-22c) is utilized to start the AC induction motor (12) and bring the AC induction motor (12) to near full operating speed. As the AC induction motor nears full operating speed, gamma control of the thyristor switches (22a-22c) is utilized to bring the AC induction motor (12) to full operating speed. With the AC induction motor (12) at full operating speed, bypass contactors (24a-24c), in parallel across corresponding thyristor switches (22a-22c), are closed and the AC induction motor (12) operates in a conventional manner.

Improvements to starting devices for electric motors

Reducing power consumption and monitoring synchronous running of three-phase electric motors

A control system for a three-phase motor has two triac switches connected in respective supply lines to the motor. Both switches are initially closed so that power is supplied to the motor on all three lines. After a predetermined time, when the motor has reached its operating speed, one switch is opened by a logic unit so that single phase power is supplied to the motor on two lines. One of the switches is subsequently periodically closed for short intervals, and the other switch is periodically opened for short intervals under control of a monostable unit, so as to produce hunting of the motor. Hunting of the motor is detected by a speed monitor responsive to the counter EMF of the motor. The system has a phase detector responsive to the phase relationship between signals on the supply lines which prevents the switches being closed if there is not the desired phase relationship between the signals.

Starting process for polyphase machines

A soft starter of asynchronous motor and its control method

A soft starter of asynchronous motor is composed of a three-phase thyristor voltage regulation circuit, current detection circuit, controller, voltage zero crossing detection circuit and a six-channel trigger pulse generator. The inputend of the three-phase thyristor voltage regulating circuit isconnected to the external power grid, and its output end is directly connected to the starter terminal of the motor. The current detection circuit compares the actual current signal detected by the motor side with the preset maximum current value of the motor, and outputs the signal to the controller. The controller calculates and processes the output control signal. The voltage zero-crossing detection circuit collects the voltage signal from the grid line voltage as the synchronous voltage signal, and then inputs the control signal and the synchronous voltage signal into the six-channel trigger pulse generatorto generate a trigger pulse. The trigger pulse controls thethree phase thyristor voltage regulator circuit to control the input voltage of the motor in real time. Figure 1 -1/4 Three-phase t or Thee-phaseAC voltage regulating Motor power supply circuit Six channel trigger pulse generator Voltage zero crossing COntrOler Current detection detection circuit Figure 1: The general structure diagram of the soft starter of asynchronous motor and its control method

Motorized system for closing a building

IMPROVEMENTS IN A POWER FACTOR CONTROL SYSTEM FOR AN AC CURRENT INDUCTION MOTOR

Circuit arrangement for achieving a smooth start-up of three-phase asynchronous motors

Apparatus and method for starting an alternating current machine

本发明涉及一种启动由交流电源电压供电的电机(10)的方法，所述方法包括在每个电压供给周期中以延时t ret 向电机(10)提供电流。启动方法包括第一序列，其中在电源电压的每个第n周期执行如下步骤，其中n是大于0的整数：a)确定电源电压的前n个周期中电机电阻的变量，b)将确定的电机电阻的所述变量值与第一阈值电阻值进行比较，c)如果电机电阻的变量值小于第一阈值，则减小t ret 。本发明还涉及一种启动装置和一种计算机程序。

METHOD AND DEVICE FOR CONTROLLING AN ELECTRIC MOTOR WITH THREE-PHASE POWER SUPPLY

L'INVENTION CONCERNE UN DISPOSITIF DE COMMANDE MONTE ENTRE UN MOTEUR ELECTRIQUE 2 ET SON ALIMENTATION TRIPHASEE 1 POUR ASSURER UN DEMARRAGE TRES RAPIDE DU MOTEUR, PUIS UNE FAIBLE CONSOMMATION D'ENERGIE, AINSI QUE POUR PRODUIRE UNE IRREGULARITE DE MARCHE DU MOTEUR. LE DISPOSITIF COMPORTE DEUX INTERRUPTEURS A TRIACS 30B ET 30C SUR DES LIGNES D'ALIMENTATION RESPECTIVES 15 ET 16. INITIALEMENT, LES DEUX INTERRUPTEURS SONT FERMES ET LE MOTEUR EST ALIMENTE PAR LES TROIS PHASES 14 A 16. APRES UNE DUREE PREDETERMINEE, UNE UNITE LOGIQUE 60 OUVRE L'UN DES INTERRUPTEURS 30C POUR QUE LE MOTEUR FONCTIONNE SUR UNE SEULE PHASE PAR DEUX LIGNES 14 ET 15. UNE IRREGULARITE DE MARCHE DU MOTEUR EST PRODUITE ENSUITE PAR DE BREVES FERMETURES PERIODIQUES DE L'UN DES INTERRUPTEURS 30C ET PAR DE BREVES OUVERTURES PERIODIQUES DE L'AUTRE INTERRUPTEUR 30B SUR COMMANDE D'UNE UNITE MONOSTABLE 80. CETTE IRREGULARITE EST DETECTEE PAR UN MONITEUR. LE DISPOSITIF EST UTILISABLE NOTAMMENT POUR L'ENTRAINEMENT D'UN GYROSCOPE.

Motor starter

Method and controlling the starting of an AC induction motor with closed loop current control

A method is provided for controlling a three-phase, AC induction motor. Each phase of the AC induction motor is connected to an AC input source by a thyristor switch and a bypass contactor connected in parallel in order to provide voltage and current to the AC induction motor. The method includes the steps of sequentially firing pairs of thyristor switches at a predetermined initial gamma firing angle. A new gamma firing angle is calculated which is dependant upon the initial gamma firing angle. Thereafter, pairs of thyristor switches are fired at the new gamma firing angle. The new gamma firing angle is provided as the initial gamma firing angle and a new gamma firing angle is calculated. The process is repeated until the AC induction motor reaches its full operating speed.

Apparatus for the control of a three-phase a.c. motor, especially a squirrel-cage motor

Apparatus for the control of a three-phase a.c. motor, especially a squirrel-cage motor, said apparatus comprising inverse-parallel connected solid-state components (D,T) in each phase, at least one of said components being control­lable. In the apparatus, the control circuit of at least one controllable solid-state component (T), e.g. thyristor, in each phase is connected via resistors (R₂) to the control circuits in the other two phases.

System and method for individual phase motor over voltage protection

A motor controller comprises a plurality of solid state switches each for connection between an AC line and a motor winding terminal for controlling application of AC power to the motor. A plurality of voltage sensors, each associated with one of the solid state switches, sense voltage for an associated motor winding. A control circuit controls operation of the solid state switches. The control circuit adjusts firing to one of the solid state switches if the sensed voltage for the associated winding varies from a threshold voltage by a select amount.

Starter for rotary electric machine

Motor starter and method for starting an electric motor

本发明涉及一种电机起动器和用于起动电动机的方法，其中，电机起动器(14)包括前沿切相单元(20)和控制单元(22)，并且其中，借助控制单元(22)，能够在前沿切相单元(20)的预先给定或者可预先给定的作用持续时间(32)结束之后，将前沿切相单元(20)去激活，并且在作用持续时间(32)结束之后运行时，将前沿切相单元(20)去激活。

A.C. Motor control

A control for an A.C. motor operates to feed a high average value of voltage to the motor during a starting period of predetermined duration and to then automatically switch the voltage supplied the motor to a lower average voltage of substantially fixed value. This lower value of average voltage is determined without feedback to the control circuit. The control may be designed for use with single phase or multiple phase motors and for motors of various different power ratings.

Apparatus and three phase induction motor starting and stopping control method

System and method for cooling power electronics of refrigerant compressors

This disclosure relates to refrigerant compressors, and, in particular, relates to cooling for the power electronics of such compressors. An example refrigerant system includes a main refrigerant loop in communication with a condenser, an evaporator, and a compressor. The refrigerant system further includes at least one cooling line configured to direct refrigerant from the main refrigerant loop to cool a chamber containing electronic components. A method is also disclosed.

Motor starter and method for starting an electric motor

A motor starter and a method for starting an electric motor are disclosed. In an embodiment, the motor starter includes a phase gating unit and a control unit. The phase gating unit is configured to be deactivated via the control unit after an activity period of the phase gating unit has elapsed and is configured to be deactivated during operation after the activity period has elapsed.

Winch arrangement for water skiers

A winch arrangement, for towing a water skier over a path of limited length in a swimming pool or like water, includes a winch having a rope wound upon a drum, the drum being drivingly connected to an electric motor and the electric motor being connected to an electricity supply via control circuitry, the control circuitry being capable of: controlling the motor to accumulate rope on the drum at a constant speed over a major portion of each run; increasing the drum speed from zero to said constant speed gradually over a short initial portion of each run; and reducing the drum speed very rapidly from said constant speed to zero at the end of each run as determined by an internal limiter or in the event of a fault signalled by one or more sensors.

Motor starter apparatus using independently rackable reduced voltage soft starter assembly.

Un aparato arrancador de motor incluye una caja, un contactor de derivación configurado para instalarse en la caja y configurado para acoplar selectivamente una fuente de alimentación a un motor, y una unidad de circuito de arrancador suave de tensión reducida (RVSS) (p. ej., un carro con ruedas), configurada para instalarse en la caja, para acoplarse a la fuente de alimentación y para aplicar una tensión variable al motor. El contactor de derivación se configura para preservar una conexión del contactor de derivación a la fuente de alimentación y al motor cuando la unidad de circuito de RVSS se retira de la caja.