Actuator control apparatus

Provided is an actuator control apparatus, wherein the output of an actuator is made to follow an instruction input from an upper-level control unit with good precision. In a motor control apparatus (100), a microcomputer (10) sets an upper-level target rotational speed for a brushless DC motor (50). In order to make the actual rotational speed of the brushless DC motor (50) follow the upper-level target rotational speed, an intermediate control unit (30) generates, before inputting the upper-level target rotational speed into an instruction input element (21) of a rotational speed control circuit (20), a pseudo upper-level rotational speed that is obtained as a result of increasing/decreasing the upper-level target rotational speed, and inputs the pseudo upper-level rotational speed into the instruction input element (21). The instruction input element (21) outputs, upon receiving the pseudo upper-level rotational speed input, a lower-level target rotational speed that has a different ...

COMMANDE DE MOTEUR POUR GYROSCOPE

A.SYSTEME D'ENTRAINEMENT DE MOTEUR PERFECTIONNE POUR GYROSCOPE DE PRECISION. B.ON UTILISE, POUR ENTRAINER LE GYROSCOPE, UN MOTEUR A INDUCTION CONTROLE PAR UNE BOUCLE VERROUILLEE EN PHASE AYANT POUR REFERENCE UNE FREQUENCE DE CONTROLE APPROPRIEE. CE SYSTEME PERMET D'ELIMINER LES PHENOMENES DE DERIVE DU GYROSCOPE RESULTANT DE L'INTERACTION DE LA POSITION DES POLES MAGNETIQUES DU MOTEUR SYNCHRONE UTILISE NORMALEMENT POUR ENTRAINER LE GYROSCOPE ET LA TOUPIE DU GYROSCOPE. C.APPLICATION POUR GYROSCOPES DE PRECISION.

DISPOSITIF DE SERVO-COMMANDE NUMERIQUE

Dispositif de servo-commande numérique. Dans un dispositif de servo-commande numérique 31 de chariot d'un système d'impression en série ou élément mobile analogue, un signal de commande 125, représente numériquement une vitesse angulaire de référence pour un moteur 26 jusqu'à un moment où un déplacement à partir d'une position courante de l'élément jusqu'à une position commandée décroit à une valeur prédéterminée, une erreur de position pendant un intervalle de temps présélectionné suivant cet instant, et une valeur intégrée 52 d'une erreur de position entre les positions courante et commandée de façon à supprimer le cycle limite après l'intervalle de temps. Un signal modulé en largeur d'impulsion 56-57 provient du signal de commande et des impulsions de position 62 ou 63 représentatif d'une variation de la position courante De préférence, un cycle limite à petite amplitude est obligé de se produire pendant l'intervalle de temps avec l'erreur de position indiquée par un signal modifié 182 ...

DISPOSITIF DE COMMANDE DE LA VITESSE D'UN MOTEUR ELECTRIQUE, NOTAMMENT POUR MACHINE A LAVER LE LINGE

DISPOSITIF DE COMMANDE DE LA VITESSE D'UN MOTEUR ELECTRIQUE AGISSANT SUR LA DUREE DE CONDUCTION D'UN INTERRUPTEUR 2 EN SERIE DANS LE CIRCUIT D'ALIMENTATION DU MOTEUR 1 EN FONCTION D'UN SIGNAL ELECTRIQUE DONT LA FREQUENCE REPRESENTE LA VITESSE. IL COMPREND UN GENERATEUR D'UN SIGNAL DONT LA FREQUENCE FC, APPELEE FREQUENCE DE CONSIGNE, REPRESENTE LA VITESSE DESIREE, ET UN MOYEN NUMERIQUE 12 DE CONVERSION DE CETTE FREQUENCE EN UN SIGNAL NUMERIQUE REPRESENTANT LA DUREE DE CONDUCTION DE L'INTERRUPTEUR. CE DISPOSITIF 6 COMPORTE DE PREFERENCE UNE ENTREE 9 DE CONTRE-REACTION SUR LAQUELLE EST APPLIQUE UN SIGNAL DONT LA FREQUENCE FT REPRESENTE LA VITESSE REELLE DU MOTEUR. IL EST REALISABLE SOUS FORME DE CIRCUIT INTEGRE NUMERIQUE.

MOTOR DRIVE CONTROL DEVICE

MOTOR CONTROL APPARATUS AND MOTOR CONTROL METHOD

A motor control apparatus (110) calculates, based on a motor speed, a motor torque command and causes a motor to generate a torque in accordance with the motor torque command, thereby driving a load machine coupled to the motor. The motor control apparatus (110) comprises a speed compensating part (103) that, when calculating, based on the motor speed, a speed compensation torque, causes the frequency characteristic of the speed compensation torque for the motor speed to be a low frequency band blocking characteristic such that the steady-state gain of the frequency response is lower than the gain maximum value; and a torque adder (106) that adds an externally inputted torque feedforward signal to the speed compensation torque to provide the motor torque command. © KIPO & WIPO 2008 ...

SERVO MOTOR CONTROL DEVICE AND CONTROL METHOD

A servo motor control device having a feedback loop includes: an oscillation detection unit which detects oscillation of the feedback loop and outputs an oscillation detection signal; a parameter operation unit which operation-instructs setting of a feedback loop control parameter in accordance with the oscillation detection signal; and an update unit which receives a setting value for setting the control parameter and sets the control parameter in the feedback loop while updating the setting value in accordance with the operation instruction of the parameter operation unit. When the oscillation detection signal indicates that no oscillation is detected, the parameter operation unit operation-instructs the update unit to set a control parameter based on the supplied set value. When the oscillation detection signal indicates that oscillation is detected, the parameter operation unit operation-instructs the update unit to set a control parameter which reduces a frequency bandwidth of the ...

Process time control system

A process time control system of a digital type has a sensor associated with a motor used for driving a product through a process length and logic circuits for providing a timing pulse corresponding to a time increment for the product to traverse a small process length increment. During this timing pulse clock pulses having a high pulse repetition rate, calibrated to correspond to a predetermined time increment per process length increment, are supplied to a BCD counter and compared by a digital comparator to a BCD number representing a preselected desired process time. The comparator and associated logic gates provide a signals for causing the count of an up-down counter to be incremented either down or up, respectively, according to whatever the BCD count is greater or less, respectively, than the preselected BCD number. A clock pulse source provides slow rate incrementing pulses for this purpose. A recycling binary counter repeatedly counts to its maximum count in response to high repetition ...

Phase energisation controller and method for controlling switched reluctance machines using simple angular position sensors with improved angle interpolation

An angle interpolation circuit for a phase energisation controller receives absolute positions from sensors and interpolates conduction angles for each phase in a switched reluctance machine having one or more phases. It uses a frequency multiplier to generate an integer number of pulses between the edges of the sensor signal for clocking a corresponding counter for each machine phase. The circuit adjusts for variations in the mark/space ratio of sensor inputs by setting the counters' expected values at each sensor edge. ...

Multiplexed digital control device

A multiplexed digital control device includes a plurality of control circuits (10A, 10B, 10C) and a main signal selection circuit (7) for selecting and outputting a specific signal among the outputted manipulated variables of the plurality of the control circuits according to a predetermined logic. Each control circuit has sub-signal selection means (16) for comparing an internal data of the control circuit obtained as a result of control operation thereof for an identical input signal of the device with internal data of other control circuits obtained as a result of control operations thereof and selecting a specific data among them, according to a predetermined logic. The specific data selected by the sub-signal selection means (16) is outputted as a manipulated variable of its own control system. ...

Print head velocity control system using analog and digital feedback

SPEED CONTROLLER

PURPOSE: To remarkably increase the tracking performance of a numerical controller with simple constitution, by constituting a negative feedback integrating loop taking a digital-frequency converter as a virtual gain element and using a realized LPF for the speed control of the numerical controller. CONSTITUTION: An arithmetic circuit 5 outputs a shift pulse train in a specified speed based on an input data. A digital-frequency converter 8 outputs a pulse train of a frequency proportional to a digital input value from a counter 6. The ouptut pulse train and that of the circuit 5 are inputted to the counter 6, the deviation of both the pulse trains is stored in real time and the output becomes a digital input of the converter 8. Thus, the smoothing of acceleration and deceleration change can be made simply by adding an LPF to a conventional speed controller, allowing to make continuous positioning with high accuracy and high speed. COPYRIGHT: (C)1982,JPO&Japio ...

SYSTEME DE SERVO-COMMANDE

Système de servo-commande. b. Circuit caractérisé par un moyen fournissant des impulsions de comptage supplémentaires au moyen de comptage du détecteur de vitesse de rotation pour introduise les erreurs de phase, détectées par le moyen de détection de phase de rotation et celles du détecteur de vitesse de rotation, et un circuit pour commander la rotation de l'organe rotatif en fonction des résultats fournis par le moyen de détection de vitesse de rotation ...

CIRCUIT D'ASSERVISSEMENT NUMERIQUE EN FONCTION DE LA FREQUENCE

L'INVENTION CONCERNE UN CIRCUIT D'ASSERVISSEMENT EN FREQUENCE. POUR REALISER UN ASSERVISSEMENT EN FREQUENCE COMPLETEMENT NUMERIQUE, ON UTILISE UN CIRCUIT COMPORTANT UN COMPTEUR-DECOMPTEUR 16 RECEVANT EN COMPTAGE LA FREQUENCE DE CONSIGNE FE ET EN DECOMPTE LA FREQUENCE DE MESURE FX, UN COMPARATEUR DE PERIODES 18 RECEVANT LES FREQUENCES FC ET FX ET FOURNISSANT UN SIGNAL INDIQUANT SI FC EST SUPERIEUR, INFERIEUR OU EGAL A FX, UN ADDITIONNEUR LOGIQUE 20 ETABLISSANT UNE VALEUR K1X (CONTENU DU COMPTEUR) K2X (SIGNAL DE SORTIE DU COMPARATEUR), ET UN LIMITEUR 22 PLACE EN SORTIE DE L'ADDITIONNEUR. CE CIRCUIT REALISE DE MANIERE SIMPLE UN ASSERVISSEMENT NUMERIQUE EN FREQUENCE UTILISABLE PAR EXEMPLE POUR LA REGULATION DE VITESSE D'UN MOTEUR DE MACHINE AVEC PROGRAMMATION POSSIBLE DE LA VITESSE.

MOTOR CONTROL DEVICE

METHOD CONTROLLING SERVOMOTOR

A method of controlling a servomotor by controlling the speed and current of the servomotor in a digital manner. Correction values (23, 27) are so applied that the integration gain (22) and the loop proportional gain (26) of the current control loop will increase depending upon the speed of the servomotor. Since the current loop gain increases depending upon the speed of the servomotor, no oscillation takes place in the current loop when the servomotor runs at low speeds or is at halt. Furthermore, a decrease in the torque caused by the lowered current loop gain during the high-speed operation can be prevented.

DIGITAL VARIABLE SPEED CONTROLLER COMPARING A TACHOMETER PULSE SOURCE WITH A REFERENCE

Apparatus and method for determining friction associated with an electric motor

Apparatus for dynamically monitoring the friction associated with an electromechanical system including a motor is provided with a closed loop servo with a filtering means in the feed forward loop for driving the electromechanical system. The value of the filtered error signal outputted from the filtering means correlates with the friction in said electromechanical system.

DIGITAL SPEED CONTROLLER

PURPOSE: To attain a smooth and speedy lock-in action in a start mode by detecting the operating state of a speed comparison means for control of a U/D counter or a memory means. CONSTITUTION: A frequency generator 2 detects the rotational frequency (speed) of a motor 1 to be controlled in the form of a frequency signal SFG. Then the speed error information D1 is supplied to a digital filter 4 via a digital speed comparing means 3. The filter 4 applies a digital processing to the information D1 and delivers it to a drive means 5 for control of the revolving speed of the motor 1. Here a state detecting means 6 is provided for detection of the speed comparison state of the means 3. A U/D counter 4c is controlled by the detection output S3. Thus it is possible to reset all bits with the counter 4c in an acceleration period of a start mode. Then the output D2 is controlled to the minimum value (zero) and therefore a start command equal to the output D1 of the means 3. In addition, the output ...

DISPOSITIF D'ASSERVISSEMENT DE VITESSE D'UN MOTEUR SYNCHRONE A HYSTERESIS

La présente invention concerne un dispositif d'asservissement de vitesse d'un moteur synchrone à hystérésis. Ce dispositif comprend deux boucles de réaction il et 12 pour commander le moteur 10. La boucle de réaction Il est une boucle d'amortissement de vitesse qui répond rapidement à de faibles variations de vitesse du moteur 10 pour maintenir ce moteur à une vitesse de commande prédéterminée. L'autre boucle est une boucle d'erreur d'état stable par laquelle une vitesse de commande est fournie à un commutateur 111, cette deuxième boucle répondant plus lentement aux variations de la vitesse de commande. L'utilisation de deux boucles permet à l'asservissement de réagir rapidement à des variations de la vitesse réelle du moteur par rapport à la vitesse de commande et est insensible à des variations à basse fréquence telles que celles qui résultent de perturbations dans la charge du moteur. Application aux moteurs d'entraînement de miroirs tournants dans des dispositifs d'impression.

DISPOSITIF DE REGULATION DE LA VITESSE DE ROTATION D'UN MOTEUR ELECTRIQUE

DISPOSITIF DE REGULATION DE VITESSE DE ROTATION D'UN MOTEUR ELECTRIQUE COMPRENANT DES MOYENS D'INITIALISATION, DES MOYENS D'HORLOGE, DES MOYENS DE MESURE DE LA VITESSE REELLE DE ROTATION V DU MOTEUR COMMANDES PAR LES MOYENS D'INITIALISATION ET LES MOYENS D'HORLOGE, DES MOYENS D'ALIMENTATION DU MOTEUR DELIVRANT A CELUI-CI UNE TENSION OU COURANT FONCTION DE LA DIFFERENCE ENTRE LA VITESSE V ET UNE VITESSE DE REFERENCE V. SELON L'INVENTION LE DISPOSITIF DE REGULATION EST CARACTERISE EN CE QUE LES MOYENS DE MESURE DE VITESSE SONT CONSTITUES PAR DES MEMES MOYENS DE COMPTAGE COMMANDES PAR DES MOYENS DE PRE-POSITIONNEMENT PRE-POSITIONNANT LESDITS MOYENS DE COMPTAGE A UNE VALEUR FONCTION DE LA VITESSE DE REFERENCE V. APPLICABLE A LA COMMANDE DES MOTEURS D'ENTRAINEMENT DES DISQUES MAGNETIQUES D'UNE MEMOIRE A DISQUES.

CONTROLE NUMERIQUE DE LA VITESSE D'UN MOTEUR

A.CONTROLE NUMERIQUE DE LA VITESSE D'UN MOTEUR. B.UN CIRCUIT DE COMMUTATION 22 EST DEBLOQUE PAR LE DEBUT D'UN SIGNAL D'UNE PREMIERE HORLOGE ET EST BLOQUE EN REPONSE A UN SIGNAL D'UN DETECTEUR DE ROTATION D'UN ARBRE DE GYROSCOPE. PENDANT LA PERIODE OU LE CIRCUIT DE COMMUTATION RESTE DEBLOQUE, UN COMPTEUR COMPTE LES CYCLES DES SIGNAUX D'UNE SECONDE HORLOGE. CE COMPTE SERT DE SIGNAL D'ERREUR POUR AJUSTER LA FREQUENCE DE SORTIE D'UN GENERATEUR D'IMPULSIONS RELIE A UN MOTEUR DE GYROSCOPE. UNE BOUCLE DE RETRO-ACTION SE CREE ENTRE CES ELEMENTS POUR ASSURER UNE VITESSE CONSTANTE PRESELECTIONNEE DU MOTEUR DE GYROSCOPE. C.APPLICATION: GYROSCOPES.

DISPOSITIF DE COMMANDE DE MOTEUR

L'invention concerne un dispositif de commande de moteur. Il comporte un générateur d'impulsions d'horloge et des circuits de porte qui, à partir de ces impulsions, produisent un signal de vitesse supérieure à la normale, un signal de démarrage, un signal de relâchement de freinage et un signal de rotation dans le sens direct. Une tension produisant le couple maximal est produite en réponse au signal de démarrage ainsi que dans le cas d'une rotation forcée du moteur dans le sens inverse. L'invention s'applique notamment à la commande d'un moteur de tourne-disque.

MOVEMENT CONTROL DEVICE, MOVEMENT CONTROL METHOD, AND MOVEMENT CONTROL CIRCUIT

A movement control device is provided with: an actuator (1) that causes the reciprocal movement of a driven body (9) connected to a drive coil (12); a signal generation unit (8) that generates a speed command signal indicating a target speed for the driven body; a driving unit (4) that supplies a current to the drive coil in response to a drive signal; a voltage detection unit (5) that detects the induced voltage generated by the drive coil, and outputs a voltage signal corresponding to the induced voltage; a signal correction unit (6) that corrects, on the basis of the drive signal and the voltage signal, the voltage signal so as to adjust the offset of a resistance value of the drive coil from a reference resistance value, and generates a speed signal; and a control unit (7) that generates, on the basis of the speed command signal and the speed signal, a drive signal, and outputs the same to the driving unit.

Speed control system for a corrugator

The separate motors of the single facer and double facer machines of a corrugator are controlled in response to separate digital set point signals. Each set point signal is generated by a counter in response to a pulse generator. In a RUN mode, the counter automatically generates a preselected set point signal indicative of a preselected minimum speed and the motor speed is brought up to the preselected minimum speed. The pulse generator and counter are free-running until a digital detector senses the preselected set point signal and inhibits the pulse generator. In FAST and SLOW modes, the pulse generator is selectively steered by the operator to cause the counter to generate selective set point signals indicative of selective set point speeds and the motor speed is varied to the set point speeds. In SET, SPLICE HOLD and SLOW HOLD modes, the set point signal is automatically varied to indicate either an adjustable reference speed set by thumb wheel switches or preset reference speeds set ...

ELECTROMECHANICAL STEP-LESS HYBRID NUMERICALLY CONTROLLED VARIATOR

Die Erfindung betrifft Verfahren zur Steuerung der Drehgeschwindigkeit der Wellen von Betätigungsmechanismen. Die Vorrichtung gemäß der Erfindung umfasst einen Stator, der auf einer Eingangswelle befestigt ist und mit einer Stromübertragungsvorrichtung elektrisch verbunden ist, einen Rotor, der auf einer Ausgangswelle befestigt ist und sich in einem Lager dreht, eine Impulsbreitenmodulations-Steuervorrichtung zur Steuerung von Leistungsschaltern, die wiederum die Frequenz der Statorwicklungen zugeführten Leistung regeln, einen Frequenzteiler zur Teilung der von einem Referenzgenerator zugeführten Frequenz, einen Bypass zur Beseitigung des Reihenwiderstands, um diejenige Spannung zu messen, die einem Laststrom in den Statorwicklungen proportional ist, einen spannungsgesteuerten Generator zur Änderung der Ausgangsfrequenz gemäß der Spannung am Bypass und Optokopplereinheiten, die mit einem Empfänger und mit einer drehbaren Schlitzscheibe versehen sind, die dazwischen befestigt ist. Der Frequenzteilungsfaktor ...

MOTOR SPEED CONTROLLER

PURPOSE: To control the rotating speed of a motor more accurately than a conventional one by adding a bias signal to variation data and controlling the motor. CONSTITUTION: A calculated rotating speed output from speed calculating means 30 is subtracted by control means 40 by the set speed data of a speed setter 38. Control data output from the means 40 is converted by a D/A converter 46 into an analog signal. The bias data of bias value setting means 42 is converted by a D/A converter 48 to an analog signal. The signal converted by the converters 46, 48 are supplied to an added by an adder 50, applied as a speed control signal through a drive circuit 52 to a motor 12, and the rotating speed of the motor 12 is controlled by the rotating speed set by the set data of the setter 38. COPYRIGHT: (C)1986,JPO&Japio ...

DISPOSITIF D'ASSERVISSEMENT DE VITESSE

DISPOSITIF D'ASSERVISSEMENT DE VITESSE. UN GENERATEUR DE FONCTION 25 RECOIT LE SIGNAL SVM REPRESENTANT LA VITESSE DE ROTATION D'UN MOTEUR 13 ET ELABORE EN CN F (VM), F (VM) ETANT UNE FONCTION UNIVOQUE ET MONOTONE DE LA VITESSE REELLE VM DU MOTEUR ET CN ETANT ELABOREE PAR DES MOYENS DE CALCUL 24 DE MANIERE QUE: CN EN - F (VM), VM ETANT LA VALEUR DE CONSIGNE DE VITESSE DE ROTATION DU MOTEUR. CELUI-CI EST ALIMENTE PAR UN SIGNAL DE FONCTION DE EN. L'INFORMATION DE CONSIGNE F (VM) IC EST ELABOREE A PARTIR D'UNE INFORMATION D'ERREUR FONCTION DE L'ECART ENTRE LES VITESSES REELLE VB ET DE REFERENCE VP D'UNE BANDE 10 ENTRAINEE PAR LE MOTEUR, LE TAUX DE VARIATION DE IC AYANT UNE VALEUR MAXIMALE LIMITEE EN VALEUR ABSOLUE. LE DISPOSITIF CONVIENT POUR ASSERVIR LE DEFILEMENT D'UNE BANDE PORTEUSE DE SON A LA FREQUENCE D'UN SIGNAL PILOTE.

Apparatus for synchronization of a motor

Synchronization apparatus for a motor comprising a maintenance circuit furnishing to the motor the necessary energy for its rotation and delivering a frequency fm proportional to its speed, and utilizing a precise frequency fp furnished, for example, by a quartz oscillator connected to a frequency divider. Connected to a bistable phase comparator are the output frequency f1 = fp/x of a divider by x, and the output of frequency f2 of a divider by x + α to the input of which divider there is added αy impulses to each cycle of the frequency fm. The output of the phase comparator acts on the maintenance circuit such as to interrupt or re-establish the distribution of the energy to the motor according to whether this output is in one state or the other such that f2 is equal and in phase with f1 and fm is sychronized to a mean value equal to fp/xy for which α, x, and y are whole numbers.

A method and apparatus for the optimization of thyristor power supply transport time delay

A digital current control arrangement for optimizing the transport time delay of a thyristor power supply used as a source of armature current for a DC motor utilizes a coarse gate angle interrupt subroutine to perform a preliminary calculation of the gate firing angle for the next thyristor to be fired. The coarse gate angle calculation is performed at a predetermined time following the firing of a previous thyristor. A finite gate angle interrupt subroutine is also provided for recalculating the gate firing angle at a second predetermined time just prior to the firing of the thyristor. The finite and coarse gate angle interrupt subroutines both perform their respective calculations using the common parameters. A flag passing arrangement is also included in the current control arrangement and is effective to insure that the finite gate firing angle is the preferred calculation used in the firing of the next thyristor.

SYSTEMS AND METHODS FOR CONTROLLING A DC MOTOR

Various systems and methods for controlling DC motors are disclosed herein. For example, one method provides for controlling a polyphase, brushless DC motor. The method includes providing a DC motor that has a plurality of phases. Such a DC motor operates by inducing a current in the plurality of phases in accordance with a plurality of commutation states. In the example, six commutation states are discussed, but fewer than or more than six commutation states may exist. The method further includes initializing a count (405), including a current in the plurality of phases in accordance with a first commutation state (415), and incrementing the count until the current achieves a threshold (420) in the first commutation state (415). Then, a current is induced in the plurality of phases in accordance with a second commutation state (430), and the count is decremented (447) until the current achieves the threshold in the second commutation state (430). The sign bit (455) of the count is stored ...

FREQUENCY/SPEED CONTROLLER

A frequency/speed controller (10) for controlling the frequency or speed of a device (12) by comparing the frequency (F2) of the device to a know reference frequency (F1) and matching the device frequency with the reference frequency. The controller uses an up/down counter (18) whose count at any given time is the digital quantized form of t (f1-f2) dt where f1 and f2 are the frequencies to be matched.

System for controlling the rotational speed of a rotary member

The present invention provides a system for controlling the rotational speed of a rotary member such as a video tape recorder drum or the like. The system detects a zero crossing interval in the output of a frequency generator, adding it to the subsequent zero crossing interval in the delayed output signal and using the result to control the motor or the like.

Controller of motors

Controlling a motor (307) having a high standard frequency in a manner to be given priority when servo-controlling a plurality of motors (106, 307) allows the delay time of motor control to be reduced and the servo control of the motors (106, 307) to be performed with a good response characteristic. ...

MOTOR CONTROL CIRCUIT

PURPOSE: To eliminate the effect of temperature change and ensure size reduction by digitalizing a servo-circuit so that the voltage proportional to the count value of clock pulses that is obtained during 1 cyclic period of the output of a speed generator. CONSTITUTION: A required trigger pulse shaped waveform is obtained by passing the output of an AC generator FG connected to a motor M directly through a waveform shaping circuit 1 and a differentiation circuit 2. The signal is fed to a counter 5 and the clock pulses from a clock oscillator 6 is counted during the period corresponding to one cycle of AC generated by an AC generator FG. The count value is fed to a memroy 7 and read in terms of 1 cyclic pulse input. Thus-obtained value is converted into analog value by a D/A converting circuit 8, passed through a filter 9 and supplied to a power transistor 10 to apply a voltage proportional to the analog value to the motor M. COPYRIGHT: (C)1981,JPO&Japio ...

DISCRIMINATEUR DE VITESSE ANGULAIRE ET MOTEUR COMPORTANT UN TEL DISPOSITIF

Dispositif numérique permettant, avec un effet d'hystérésis, de fournir un signal de commande S à deux états, indiquant le régime de rotation d'un moteur. Dispositif comprenant : un capteur 100 de la vitesse de rotation N du moteur, des moyens de mesure de la période de révolution du moteur, ces moyens comportant : un compteur binaire 20 incrémenté par le signal de sortie d'un circuit d'horloge 10 et remis cycliquement à zéro par les signaux de sortie du capteur, des reccnnaisseurs 30 et 40 ; des moyens logiques permettant de déterminer les vitesses N1 et N2 correspondant aux deux états du signal S; ces moyens comportant des bascules de mémoire 50 et 60 et une porte 70. Le dispositif trouve des applications dans la commande des moteurs, notamment, des moteurs pour véhicules automobile.

Motor driving circuit, motor driving apparatus having the same, and method for driving motor

A method and apparatus for the optimization of thyristor power supply transport time delay

System for controlling the speed of an electric motor

The system comprises two counters (1 and 2) which receive counting pulses from an oscillator (5) and control pulses from a tachogenerator (11). The first counter (1) is reset by a tacho-pulse and counts to a predetermined maximum value. The counting direction of the second counter (2) is reversed both when a tacho-pulse appears and when the predetermined fixed value is reached by the first counter (1). The control signal for the motor is obtained by comparing the count of the second counter (2) with a reference value (R) in a comparator (14) to derive an on-off signal.

Circuit de compensation de l'erreur de phase résiduelle pour un asservissement numérique.

L'invention concerne les asservissements. Le circuit de détection d'erreur de phase d'un dispositif d'asservissement numérique comprend notamment un circuit de compensation automatique d'erreur résiduelle 106. La mesure des erreurs de phase s'effectue en comptant des impulsions d'un signal d'horloge entre l'arrivée d'un signal de position réelle et l'arrivée d'un signal de référence. Le circuit 106 commande le retard qui est appliqué au signal de position en fonction de l'erreur de phase résiduelle, pour réduire au minimum cette dernière. Application aux magnétoscopes.

MOTOR CONTROL CIRCUIT

Disclosed is a motor control circuit for variably controlling motor speed, capable of automatically setting an appropriate control gain depending on the set motor speed. The disclosed motor control circuit (10) is provided with: a period error signal output means (20) for outputting a period error signal depending on the difference between the period (FG_count) of a detection signal inputted from a speed detection means (FG) and the period (EXC_count) of a reference signal (EXC) inputted from outside; a speed error signal output means (22) for outputting the speed error signal obtained by multiplying the speed gain with the period error signal; and a gain correction means (28, 30) which corrects a prescribed speed gain (Kf) by means of setting as a correction quantity the ratio of a correction reference period (Ref_count) to the period (EXC_count) of the reference signal (EXC), squaring said correction quantity and multiplying the result with the prescribed speed gain (Kf) supplied by the ...

MOTOR DRIVE CIRCUIT, MOTOR, AND MOTOR DRIVE METHOD

A motor drive circuit which can be suitably made into a small IC, has a reduced number of outer components and a small size, and is capable of stably rotating a motor. When a rotor (101) is rotated by three-phase drive signals U, V, W generated according to a CLK signal from a VCO (7), the induced voltage in the three-phase coil (102) is monitored, and the phase shift from the electrical phase of the rotor phase is detected. A charge pump circuit (5) is driven with an up signal f_up which is active for the time corresponding the phase delay when the rotor phase is lagged behind the electrical phase or with a down signal f_down which is active for the time corresponding to the phase lead when the rotor phase is ahead of the electrical phase. This motor drive circuit (1) instantaneously, dynamically, and directly varies the voltage at the VCO control terminal (T_cp) according to the detected phase shift information without using a smoothing filter.

Turntable speed control system

In a video disc system for recovering prerecorded signals from a disc record by a signal pickup including a turntable, turntable drive means, and turntable speed adjusting means, a turntable speed control system is provided for maintaining the rotation of the turntable at a predetermined speed. Means responsive to the rotation of the turntable generate sample pulses having a frequency which is a function of the actual speed of rotation of the turntable. The sample pulse occur at a predetermined frequency when the turntable is rotating at the predetermined speed. Means are employed for generating a sawtooth-shaped reference wave having a frequency which is a multiple of the predetermined frequency. A sample-and-hold circuit is coupled to the sample pulse generating means and reference wave generating means for determining the magnitude of the reference wave during the occurrence of each of the sample pulses for developing a speed error correction signal. The magnitude of the speed error ...

Speed control device for stepping motor

A speed control device for a stepping motor is disclosed which is possible to freely control the running speed of the stepping motor when driving it in a closed loop. Its mechanism is designed to be possible to decide which excitation phase to be excited according to a phase difference between the output signals emitted from the encoder and the speed-variable reference clock signals and to make the running speed of the stepping motor follow to the instruction of said reference clock signals.

SYSTEME DE COMMANDE DESTINE A COMMANDER LE DEPLACEMENT D'UN ELEMENT MOBILE

Un système de commande destiné a commander le déplacement d'un élément mobile tel qu'un chariot de tête d'impression matricielle comprend un premier compteur qui est incrémenté par des signaux d'horloge, l'obtention d'une valeur maximale provoquant le changement d'état d'un dispositif bistable, ce qui a pour effet de conditionner la durée de signaux d'excitation PLSWDON appliqués à un moteur à courant continu. En cours de fonctionnement, un second compteur compte d'autres signaux d'horloge apparaissant entre des signaux de détection successifs issus de l'elément mobile pour fournir une valeur indiquant la vitesse réelle de cet élément, la valeur complémentée tant transférée, par l'intermédiaire d'un multiplexeur, au premier compteur, en alternance avec une valeur prédéterminée issue d'interrupteurs, ce qui détermine des périodes d'application variables et de non-application fixes pour les signaux PLSWDON.

Circuit à semi-conducteurs permettant de régler la vitesse de rotation de moteurs électriques.

L'invention concerne un circuit à semiconducteurs permettant de régler la vitesse de rotation de moteurs électriques. Dans ce circuit, qui comporte un moteur électrique M, raccordé par des circuits électroniques à une mémoire de valeurs réelles IWS et une mémoire de valeurs de consigne SWS ainsi qu'à différents compteurs et à un générateur de cadence PKT, la commande du moteur électrique M est réalisée au moyen d'un convertisseur analogique/numérique Sch, G, Z1 prévu entre un détecteur SE détectant la vitesse de rotation du moteur et l'organe de réglage St agisant sur le courant alimentant le moteur. Application notamment aux systèmes intégrés monolithiques à semiconducteurs réglant la vitesse de rotation de moteurs.

Combination microprocessor and discrete element control system for a clock rate controlled electronically commutated motor

A motor velocity control system employing feedback to maintain actual motor rotational velocity at or near a desired rotational velocity implements a clock rate control motor rotational velocity system by advantageously apportioning the required functions between a relatively small, slow speed microprocessor, and a plurality of discrete circuit elements in the form of analog and digital logic devices. The microprocessor serves the following four general functions: (1) as a "basic clock" timer of variable rate to set up motor speed; (2) as a relatively slow speed determiner of when various components are to be switched for commutation, and for indicting to an integrator circuit which motor winding is currently unenergized and which therefore may be sampled for determining rotor actual position; (3) as a digital feed to a digital to analog (D/A) converter for setting a motor winding current limit; in accordance with the principles of the Alley; and (4) as a communication link to receive velocity ...

Electromechanical actuator

An electromechnical actuator comprises an electric motor 1, a control and drive circuit 2, 3 mounted integral with the electric motor 1, said control and drive circuit 2, 3 comprising a serial-to-parallel converter 12A for converting a control signal in the form of serial data 14A into parallel data, and mean responsive to the control signal in the form of parallel data for producing a drive current or voltage for the electric motor 1. A system for accessing or controlling by means of command from a main controller 13 to a plurality of actuators 11 having a control and drive circuit 2, 3 integral with the motor 1 itself is also disclosed.

CIRCUIT D'ASSERVISSEMENT NUMERIQUE COMPORTANT NOTAMMENT UN COMPTEUR A N BITS

A.CIRCUIT D'ASSERVISSEMENT NUMERIQUE COMPORTANT NOTAMMENT UN COMPTEUR A N BITS. B.CIRCUIT D'ASSERVISSEMENT COMPORTANT UNE BASCULE BISTABLE 21 ET UN GENERATEUR DE CADENCE 22 RELIES AUX ENTREES D'UNE PORTE ET 23 ALIMENTANT UN PREMIER COMPTEUR 24 DONT L'UNE DES SORTIES C ALIMENTE UN SECOND COMPTEUR 25, CE DERNIER ETANT RELIE A UN DETECTEUR D'ETAT D'ASSERVISSEMENT 41 ET A UN COMPTEUR 42, LES COMPTEURS 24, 25 FOURNISSANT 31, 32, 33 LEURS SIGNAUX DE COMPTAGE A UN CIRCUIT DE MELANGE 26... 55 FOURNISSANT LE SIGNAL D'ASSERVISSEMENT. C.L'INVENTION S'APPLIQUE NOTAMMENT A L'ASSERVISSEMENT NUMERIQUE PAR EXEMPLE DE MOTEURS DE MAGNETOSCOPE.

MOTOR CONTROL APPARATUS, MOTOR CONTROL METHOD, AND CONTROL PROGRAM

A motor control apparatus (1) comprising: a command generator (11) for generating an acceleration pattern that chronologically shows acceleration command values used when making a target object (34) move to an intended position using a motor (31), the command generator performing a change to extend the time to decelerate the drive speed of the motor (31) in accordance with the response properties of the motor (31) relative to the generated acceleration pattern, and the command generator outputting a position command value from the modified acceleration pattern; and a controller (12) for driving the motor (31) using proportionate control related to the location deviation between the position control value outputted by the command generator (11) and the intended position of the target object (34), and changing the proportionate control gain in the proportionate control to a value greater than the current value when the target object (34) arrives in the vicinity of the intended position.

METHOD AND CIRCUIT FOR ADJUSTING THE ROTATION SPEED OR THE FREQUENCY OF AN ELECTRIC MOTOR

In the method and circuit for adjusting the rotation speed or the frequency of an electric motor (according to the PLL principle), frequencies or reference pulses generated by a frequency generator (2) connected to the input of an AND gate (7), of which the second input is connected to the output of a locking circuit for locking the reference pulses (5), as well as the frequency of the motor or the tachymetric pulses generated by a tachymetric generator (4) driven by the motor and connected, via a pulse forming device (10), to the input of a second AND gate (8), of which the second input is connected to the output of a locking circuit for locking the tachymetric pulses (6), are provided to a phase regulating circuit having a flip-flop RS (1) of which the output controls the electric motor (3) via an amplifier stage (9). The input (S) of this flip-flop RS (1) is connected to the output of the first AND gate (7) while the output of the second AND gate (8) is connected to the input (R) of ...

Digital servo circuit

A digital servo circuit which, for example, may be used in a video tape recorder, for controlling the velocity and the phase of movement of a video tape by a capstan which is driven by an electric motor. The circuit includes a frequency generator for generating a pulse signal having a repetition rate that varies in accordance with the velocity of the capstan, and hence of the tape driven thereby an n-bit presettable counter for counting a reference clock signal during an interval corresponding to the repetition rate of the pulse signal, a latch circuit for latching the least significant m output bits of the counter (where m is less than n), a control circuit for controlling the m-bit output from the latch circuit so as substantially to hold the latter output at the minimum level when the n-bit output from the counter is less than a first predetermined value, and at the maximum level when the n-bit output from the counter is more than a second predetermined value, and a digital-to-analog ...

Shielded contacting device

A digital speed control device for a motor

DIGITAL SPEED CONTROLLER

PURPOSE: To stably control a motor by storing a function value calibrated from the signal of a pilot generator with the signal of a pulse oscillator and employing the stored value as a speed feedback signal at the abnormal time of the pulse oscillator. CONSTITUTION: A motor 1 is driven by a power converter 6 which controls with a phase control circuit 7. The signals from a pulse oscillator 2 connected to the motor 1 and a pilot generator 4 are respectively inputted through a counter 9 and an A/D converter 10 to a digital control circuit 8. The signal of the counter 9 is used as a speed feedback signal through a speed arithmetic unit 13 and a switch 13 at the normal time, the signals from the converter 10 and the unit 13 are applied to a function curve generator 14 at the abnormal time of the pulse generator 2, and the function value thus calibrated is used as a speed feedback signal through the switch 12, thereby controlling the circuit 7. Accordingly, the operation can be continuously ...

CONTROLLER FOR INVERTER DEVICE

PURPOSE: To facilitate the decision and regulation of the constant of a PLL circuit by not inserting a cushion circuit in the loop of an automatic control system of a PLL circuit at the time of locking the PLL circuit. CONSTITUTION: When a frequency coincidence signal is outputted, the control system of a PLL circuit 4 is switched, an output voltage clamp instruction signal 23 is outputted from a sequence circuit 16 to an output voltage clamping circuit 13, thereby controlling a voltage controller, and clamping the voltage instruction signal to zero. After the locking time of the PLL, a phase coincidence signal 22 from the phase coincidence detector 5 is outputted to the circuit 16, the output of the previous output voltage clamp instruction signal 23 is stopped at this time, and the rise differentiation instruction signal 24 is outputted to a rise differentiator 14, which controls the voltage controller and rises the voltage instruction signal at the prescribed limit and completes the ...

CONTROLLER FOR MOTOR

PURPOSE: To simplify the circuit configuration by controlling a drive current of a motor in response to the difference between the counted value of a counter which counts the output pulse width of a digital encoder and the output of a variable frequency oscillator. CONSTITUTION: A counter 3 counts one period of the output pulses of a digital encoder 2 which is mounted on the output shaft of a DC motor 1 via clock pulses, and the counted result value is applied to a latch circuit 4. A calculator 5 applies a deviation between the output of the latch circuit 4 and a reference value of the frequency corresponding to the desired rotating speed of the motor to an amplifier 7 for driving the motor 1 through a digital-to-analog converter 6. In this manner, the speed of the motor can be controlled in a wide range without varying the servo characteristics by the minimum limit counter. COPYRIGHT: (C)1984,JPO&Japio ...

CIRCUIT D'ASSERVISSEMENT NUMERIQUE POUR UN MOTEUR DE MAGNETOSCOPE

L'invention concerne les circuits d'asservissement. Un circuit d'asservissement numérique, destiné à commander la vitesse et la phase de rotation d'un moteur 14, comprend essentiellement un détecteur de phase numérique 12, un détecteur de vitesse numérique 10, et un convertisseur numérique-analogique 11 qui est attaqué par le détecteur de vitesse et qui applique un signal analogique à un circuit d'attaque 24 qui commande la rotation du moteur 14. Application aux magnétoscopes.

MOTOR DRIVE CIRCUIT, MOTOR, AND MOTOR DRIVE METHOD

A motor drive circuit which can be suitably made into a small IC, has a reduced number of outer components and a small size, and is capable of stably rotating a motor. When a rotor (101) is rotated by three-phase drive signals U, V, W generated according to a CLK signal from a VCO (7), the induced voltage in the three-phase coil (102) is monitored, and the phase shift from the electrical phase of the rotor phase is detected. A charge pump circuit (5) is driven with an up signal f_up which is active for the time corresponding the phase delay when the rotor phase is lagged behind the electrical phase or with a down signal f_down which is active for the time corresponding to the phase lead when the rotor phase is ahead of the electrical phase. This motor drive circuit (1) instantaneously, dynamically, and directly varies the voltage at the VCO control terminal (T_cp) according to the detected phase shift information without using a smoothing filter. © KIPO & WIPO 2007 ...

APPARATUS AND METHOD FOR CONTROLLING MOTOR SPEED

MOTOR DRIVE CIRCUIT, MOTOR, AND MOTOR DRIVE METHOD

ACTUATOR CONTROL APPARATUS

DUAL-TACH CAPSTAN SPEED CONTROL

DETECTING DEVICE FOR REVOLUTIONAL NUMBER OF MOTOR

PURPOSE: To quickly detect the fact that the motor has gained the prescribed number of revolutions by a method wherein a retrigger type pulse generating circuit, which generates a reference signal, is provided and the pulse widths of the reference signal and the signal of revolution number are compared. CONSTITUTION: The number of revolutions of the motor which drives a disc- shaped recording medium and the like is detected using a detector 6 containing a light-emitting diode D and a photo transistor Q, the result of which is given to a retrigger type monostable multivibrator 10 through the intermediary of a waveform shaping circuit 9, and a reference signal with the pulse width slightly smaller than that of the signal of revolution number is generated. Then, the above is inputted to an NAND gate 12 together with the signal of revolution number, and a high level detection signal is generated by responsing to the fall time using a flip-flop 15. Accordingly, the fact that the motor has attained ...

SPEED CONTROLLER

PURPOSE: To secure the actuation of a body of revolution by preventing the body from malfunction during it actuation by detecting an error in the revolution period of the body with regard to a reference period as a binary number, and then by controlling the speed of the body of revolution by using the detected binary number after pulse-width modulation output. CONSTITUTION: A digital speed controller consists of a frequency discriminator and a pulse-width modulating circuit 8, and inverter circuits 9 and 11, a D flip-flop 10, and an NOR gate circuit 12, i.e., logical circuits are added. A signal 1 is the output signal of an inverter circuit 9 which inverts a signal (f) and is the output signal of an inverter circuit 9 which inverts a signal (f) and is inputted to the terminal D of the D flip-flop 10 and the NOR gate circuit 12. Further, a (p) is the Q output of the said D flip-flop 10, and a signal (q) is a signal obtained by inverting a pulse-width modulation output (k) by the inverter ...

MOTOR CONTROL APPARATUS AND MOTOR CONTROL METHOD

Movement control device, movement control method, and movement control circuit

A movement control device is provided with: an actuator (1) that causes the reciprocal movement of a driven body (9) connected to a drive coil (12); a signal generation unit (8) that generates a speed command signal indicating a target speed for the driven body; a driving unit (4) that supplies a current to the drive coil in response to a drive signal; a voltage detection unit (5) that detects the induced voltage generated by the drive coil, and outputs a voltage signal corresponding to the induced voltage; a signal correction unit (6) that corrects, on the basis of the drive signal and the voltage signal, the voltage signal so as to adjust the offset of a resistance value of the drive coil from a reference resistance value, and generates a speed signal; and a control unit (7) that generates, on the basis of the speed command signal and the speed signal, a drive signal, and outputs the same to the driving unit.

OPERATING A THREE PHASE DEVICE USING SINGLE PHASE POWER

A powering arrangement (32, 34) for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature component is estimated based upon a numerical derivative of the direct component. The direct component is also provided to a current regulator in a feed forward control manner, which minimizes error.

Control assembly for a cyclically operating powered unit

A cyclically operating electrically or hydraulically powered unit, is provided with a control assembly comprising a partially digital control loop formed by a sensor responsive to the powered unit for the production of pulses at a multiple of the frequency thereof, a reversible counter having a count-up input receiving a control signal and a count-down input receiving a signal derived from the sensor and a digital-to-analog converter connected to the reversible counter to detect it state and supply a control signal to the powered unit.

Drive apparatus

An object (12) is moved by a motor (16) at a command speed which is a desired function of time. The current applied to the motor (16) is controlled in accordance with the phase difference between a periodic digital command speed signal and a periodic digital actual speed feedback signal. The two digital signals are applied in combination as an address input to a memory (67) which stores in the addresses thereof digital drive signals having magnitudes which are predetermined in accordance with the phase difference. The current applied to the motor (16) is proportional to the magnitude of the addressed drive signal.

MOTOR SPEED CONTROL CIRCUIT ARRANGEMENT

PURPOSE: To enhance the digital servo control accuracy of a circuit arrangement wherein a nominal value of arithmetic mean is compared with an actual value which can be taken out from the output of a counter in order to derive a set signal. CONSTITUTION: A tacho-disc 7 on a capstan shaft 3 is graduated with special lines along the outer circumference and a speed pulse signal being taken out from a scanning element 9 is delivered to the reset input RST of a counter 10 and the read/write input RAW of a memory 11. An actual digital value thus obtained is buttered in the memory 11 and counting operation of the counter 10 is resumed to generate a digital set value being provided to the input ACTUAL of a nominal value/actual value comparator 13. An analog set signal to be taken out from the output of the nominal value/actual value comparator 13 is delivered through a low-pass filter 17 to a motor output stage 18 and a set signal taken out therefrom is used for controlling a capstan motor 6. COPYRIGHT ...

SPEED CONTROL CIRCUIT FOR MOTOR

PURPOSE: To construct a circuit adapted for its integration by digitally processing a data signal detected from a disc and generating a motor control signal. CONSTITUTION: A data signal detected by a pickup 2 from a disc is inputted to a pulse generator 1. The generator 1 has a one-shot multivibrator 3 which operates with the rise of the data signal, a one-shot multivibrator 4 which operates with the fall, and an OR gate 5. The output is applied to a phase comparator 7 together with the output of a reference oscillator 6. A detector 15 detects whether the data signal is within the range of specified 3 bits to 11 bits or not. The outputs of the detector 15 and the phase comparator 7 are applied through a low pass filter 24 to a motor 25. COPYRIGHT: (C)1983,JPO&Japio ...

APPARATUS AND METHOD FOR CONTROLLING MOTOR

Sewing machine speed control system having quick response characteristic

A digital speed control system for a sewing machine comprises a digital speed setting device which responds to manual depression of a foot pedal by generating a digital position signal. A variable frequency divider divides the frequency of speed related pulses so that its output frequency is an integral submultiple of the input frequency, which is variable as a function of the digital position signal. A period detector senses the interval between pulses that occur successively at the output of the frequency divider and generates binary data representing the sensed interval. The interval-representing data is translated into a second period data in an arithmetic unit according to a predetermined transfer function. The arithmetic unit provides correction of the most recently sensed pulse interval according to the direction and amount of the deviation of the most recent pulse interval with respect to the preceding pulse interval, whereby the second period data is accordingly modified by an ...

PIN-SHARING CONTROLLER FOR DC MOTOR

PROBLEM TO BE SOLVED: To provide a technique for enabling the common use of the pin for the power and the signals of a motor controller. SOLUTION: The switching merely complies with the magnetic switching that a hole sensor detects when the magnet of a motor passes, and a diode or a resistor is used in place of a switch. Power transistors are connected severally to a voltage regulator via diodes or resistors, and any switch does not exist in the circuit. One embodiment is designed by turning it on or turning it off slowly so as to avoid the simultaneous switching. The low-speed ON is achieved by using a resistor /a capacitor (RC) display such as that the gate drive increases slowly. The high-speed OFF is obtained by discharging gate capacitor by an N-channel transistor which bypasses the RC display. COPYRIGHT: (C)2003,JPO ...

CONTROL DEVICE FOR A RADIATOR FAN, RADIATOR FAN ARRANGEMENT AND METHOD

The present invention relates to a control device for a radiator fan, in particular for a radiator fan of a motor vehicle, having an external control device which is designed to generate a controlled variable for an electric motor of the radiator fan according to a first predefined setpoint value, and having an internal control device which is designed to control the motor current of the electric motor of the radiator fan according to a predefined first motor current maximum value if the controlled variable which is generated by the external control device assumes such a value that the motor current exceeds the predefined first motor current maximum value. The present invention also relates to a radiator fan arrangement and to a method for controlling a radiator fan.

SPEED CONTROLLER

A speed controller wherein feedback data necessary for controlling the speed of a servo-motor are received from a pulse coder in a discrete data form and are digitally processed by a microprocessor to form a predetermined control command. In sampling the data at a predetermined sampling period so as to cope with the processing by the microprocessor, the lag element at a moment when the data is received by the processor as a speed data makes the control of servo motor inacurrate. Therefore, a detecting signal forming unit (5) processes the discrete count data as the sum of the count data that are divided by an integer of a sampling period in synchronism with the sampling period, and sends to a speed processing block (3b) the speed data as the latest speed data necessary for processing at a predetermined sampling period, whereby the effect of the lag element is minimized, thus enabling the microprocessor to fully exhibit its ability to accurately control the speed.

Digital speed control system

A digital speed control system includes a first binary up-counter called an Actual Count Register. The Actual Count Register is initially reset to contain all "0"'s. During a sample time, an input is applied to the Actual Count Register so that it counts up to a first binary number during the sample time. The first binary number represents a reference speed. The system includes a Reference Count Register. In response to read and store command, the first binary number is loaded into the Reference Count Register, where it remains until the next request for a new reference speed. The system further includes a first binary presettable up-counter called the Error Register. The Error Register counts up at the same rate and in response to the same count signal as the Actual Count Register. During a Transfer signal which follows the Read signal, the complement of the first binary number is transferred from the Reference Count Register into the Error Register. The system also includes a second binary ...

Digital DC motor velocity control system

A velocity control system for a motor is provided wherein first counter means are reset by feedback pulses from the motor to record the feedback period. Decode means responsive to the first counter means determines whether the feedback period is long or short and the status of this is put into storage means. An up-down counter is responsive to the storage means for adjusting the motor drive pulse width and second counter means are reset by the motor feedback pulses to terminate the drive to the motor. Comparing means are responsive to the up-down counter and said second counter means for controlling the motor drive to maintain a precise motor velocity.

METHOD CONTROLLING SERVOMOTOR

Apparatus and method for controlling speed of motor

INVERTER CONTROL DEVICE AND AN INVERTER CONTROL METHOD, CAPABLE OF DETECT AN ANALOG SIGNAL NECESSARY FOR THE CONTROL OF A MOTOR AT AN APPROPRIATE TIMING WITHOUT INCREASING THE NUMBER OF AD CONVERTERS

PURPOSE: An inverter control device and an inverter control method are provided to control a motor to be controlled while switching an input signal by detecting an analog signal, used in controlling the motor, at an appropriate timing without increasing the number of AD converters. CONSTITUTION: An inverter control device(10) for generating a control signal for an object to be controlled based on a plurality of inputted analog signals comprises the followings: a selection unit(32) for selecting N analog signals from inputted M analog signals, wherein N is an integer equal to or greater than 3 and smaller than M; M is an integer equal to or greater than 4; N AD converters(21-23) for converting the N analog signals selected by the selection unit(32) to N digital values; and a control signal generation unit(17) for generating a control signal for the object to be controlled based on the N digital values obtained by the N AD converters(21-23). © KIPO 2006 ...

MOTOR CONTROL DEVICE

ELECTROMECHANICAL STEP-LESS HYBRID NUMERICALLY CONTROLLED VARIATOR

Изобретение относится к способам регулирования скорости вращения валов исполнительных механизмов. Устройство содержит статор, закрепленный на первичном валу и соединенный электрически с токопередающим устройством, ротор, закрепленный на вторичном валу и выполненный с возможностью вращения на подшипнике, контроллер широтно-импульсной модуляции, управляющий силовыми ключами, которые в свою очередь имеют функцию управления частотой питания обмоток статора, делитель частоты делит частоту, подаваемую опорным генератором, шунт, функцией которого является снятие добавочного сопротивления для измерения напряжения, которое пропорционально току нагрузки в обмотках статора, генератор, управляемый напряжением, который в зависимости от напряжения на шунте изменяет частоту на выходе, блоки оптопар с приемником, между которыми установлен диск с прорезями, выполненный с возможностью вращения. Коэффициент деления частоты определяется кодом, подаваемым на делитель частоты с компьютера для определения частоты ...

Digital servo apparatus

Digital servo apparatus includes a counter adapted to count inputted reference clock pulses to display time data. The output of the counter is latched by a first tacho pulse (controlled signal) to a first latch circuit and the contents of the first latch circuit is transferred by a second tacho pulse to the second latch circuit and the present count data of the counter is latched to the first latch circuit. A discrimination circuit is adapted to discriminate whether or not a control signal is within a predetermined control amount, based on time difference data latched to the first and second latch circuits, and deliver an output signal corresponding to a predetermined control amount based on the result of discrimination.

MEASUREMENT OF MOTOR ROTOR POSITION OR SPEED

Circuit arrangement to control the rotating speed of a motor

A digital servo with improved control accuracy is proposed, in which the arithmetic average value of a sequential sequence of n data words is used as the basis for a set value for a set value/actual value comparison (13) which is provided for the derivation of a control signal. Depending on the value of the arithmetic average value, in this way even intermediate values of adjacent quantisation stages can be detected and taken into account in terms of control technology. ...

Method and circuit for determining optimal control parameters for rotational speed control

CONTROL CIRCUIT FOR MOTOR

PURPOSE: To reduce the displacement of a rotating speed of a motor due to a load by controlling the motor by the amount combined with the output of an up- down counter and the output of speed control means in response to the compared result of the period of a speed pulse with reference time. CONSTITUTION: A control circuit 1 applies a pulse in response to the difference between the period T1 of a speed pulse from a frequency generator 11 and a reference time T0 to a transistor 3 or 4. On the other hand, in case of T1>T0, an up-down counter 17 is counted up by a clock pulse during T1 and T0, while in case of T1 Подробнее

OPERATING A THREE PHASE DEVICE USING SINGLE PHASE POWER

A powering arrangement (32, 34) for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature component is estimated based upon a numerical derivative of the direct component. The direct component is also provided to a current regulator in a feed forward control manner, which minimizes error.

MOTOR SYSTEM

An electrical motor system in which a microcomputer (11) controlled driver (39) monitors the real time operating parameters of the motor (1) to keep the real time operating parameters of the motor (1) in a range that is governed by limiting parameters, such as maximum temperature and maximum current, thereby allowing the microcomputer (11) to control the driver (39) in order to provide to the motor (1) optimum power on a moment to moment basis. In the illustrative embodiment, the driver (39) microcomputer (11), indexer (43), power supply (17) and encoder or resolver circuitry (21) are hybridized on at least one hybrid circuit, each circuit being attached to a heat sinking system (95), potted in a series of thermally conductive and EMI/RF insulating compounds, and are enclosed in a metallic enclosure (81) which is directly coupled to the back of the motor to form a compact, unitary device.

SPEED CONTROL AND BOOTSTRAP TECHNIQUE FOR HIGH VOLTAGE MOTOR CONTROL

A circuit for controlling a high voltage pump motor in an electric vehicle is efficiently provided and provides for the use of a bootstrap circuit that functions regardless of the desired rotor speed for the pump motor. A first converting circuit (162) converts a pulse width modulated signal having a pulse width proportional to the actual rotor speed of the pump motor (108) into a first signal having a frequency proportional to the actual rotor speed. A second converting circuit (172) converts the first signal into a second signal having a voltage proportional to the actual rotor speed. Part of the circuit compares the signal whose voltage is proportional to the actual rotor speed with a signal whose voltage is proportional to the desired rotor speed, and generates an error signal having a voltage proportional to the difference between the actual rotor speed and the desired rotor speed. A comparator (200) compares the signal having a voltage proportional to the desired rotor speed with ...

Digital control device for thyristol-pulse d.c. regulators

Disclosure is made of a digital control device intended to control thyristor-pulse d.c. regulators and comprising a master oscillator whose output is connected to an input of a clock pulse counter. A multidigit logic output of the clock pulse counter is connected to two control channels, each comprising in series a matching decoder, a reversible counter, a distributor, a comparator, a digital-analog converter, a coder, and a control decoder. Multidigit inputs of the control decoders of each control channels are connected to a multidigit output of a binary counter. The binary counter has its single-digit input and its multidigit input connected to an output of a pulser and multidigit output of a control unit, respectively. An input of the control unit is connected to a velocity transducer, and its reset output is connected to reset inputs of the master oscillator, a clock pulse generator, the clock pulse counter, the reversible counters, the pulser, and a voltage transducer. Reference signal ...

MOTOR DRIVER CONTROL DEVICE

APPARATUS AND METHOD FOR CONTROLLING SPEED OF MOTOR

Disclosed herein are an apparatus and a method for controlling a speed of a motor. An apparatus for controlling a spaced of a motor according to an exemplary embodiment of the present invention includes: a PWM conversion unit detecting a hall sensor signal from a motor to output a pulse width modulated signal corresponding to the detected hall sensor signal; a duty detection unit detecting a duty value of the pulse width modulated signal output by the PWM conversion unit; an error calculation unit comparing a PWM duty input from the outside with a duty detected by the duty detection unit to obtain an error; and a speed control unit controlling a speed of a motor based on an error obtained by the error calculation unit. 1. An apparatus for controlling a motor speed , comprising:a PWM conversion unit detecting a hall sensor signal from a motor to output a pulse width modulated signal corresponding to the detected hall sensor signal;a duty detection unit detecting a duty value of the pulse width modulated signal output by the PWM conversion unit;an error calculation unit comparing a PWM duty input from the outside with a duty detected by the duty detection unit to obtain an error; anda speed control unit controlling a speed of a motor based on an error obtained by the error calculation unit.2. The apparatus according to claim 1 , wherein the PWM conversion unit outputs a pulse width modulated high or low signal.3. The apparatus according to claim 1 , wherein the PWM conversion unit detects a rising or falling edge of the hall sensor signal.4. The apparatus according to claim 3 , wherein the PWM conversion unit outputs a high or low signal for a preset time from an instant detected by the rising or fall edge of the hall sensor signal.5. The apparatus according to claim 1 , wherein the speed control unit applies a new speed indication value to the motor based on the error obtained by the error calculation unit.6. A method for controlling a speed of a motor by an ...

FAN SYSTEM - ROTATION SPEED CONTROL CIRCUIT AND METHOD FOR ROTATION SPEED ERROR AUTO-CALIBRATION THEREOF

A rotation speed control circuit with function of auto-calibrating rotation speed error is disclosed. The rotation speed control circuit includes a first multiplexer, a second multiplexer, an error amplifier and a current compensation circuit. In calibration mode, the rotation speed control circuit selects a calibration clock signal and a calibration voltage through the first multiplexer and the second multiplexer correspondingly according to a mode switch signal, and adjusts current value of a first current accordingly. In other words, the rotation speed control circuit utilizes the first current to compensate error of the external capacitor through the calibration clock signal fixed and the calibration voltage fixed in the duration of calibration mode, so as to avoid that aging of the external capacitor leads to rotation speed error and then affects the whole operation. 1. A rotation speed control circuit with function of auto-calibrating rotation speed error , comprising:a first multiplexer, connected to a calibration clock signal and a rotation speed clock signal, for outputting a first switch signal according to a mode switch signal, wherein after the first multiplexer receives the first switch signal via an edge-trigger detector, the first multiplexer sequentially outputs a second switch signal and a third switch signal with high voltage level when the first switch signal is in high voltage level;a second multiplexer, connected to a calibration voltage and a reference voltage, for outputting a target voltage according to the mode switch signal;an error amplifier, connected to an external capacitor and the second multiplexer, for outputting an error voltage according to a capacitor voltage and the target voltage; anda current compensation circuit, having a preset current value, connected to the first switch signal, the current compensation circuit adjusting a first current so as to compensate the external capacitor,wherein in a calibration mode, the first and ...

APPARATUS FOR DETECTING SPEED OF MOTOR

An apparatus for detecting speed of a motor is disclosed, the apparatus including an amplifier configured to amplify a two-phase sine-wave signal inputted from an encoder based on rotation of a motor; a first conversion unit configured to convert the two-phase sine-wave signal to a digital data; a second conversion unit configured to convert the two-phase sine-wave signal to a square-wave signal; a counter unit configured to accumulate by counting the square-wave signal; and a speed determination unit configured to determine a speed of the motor, by receiving the digital data from the first conversion unit and the accumulated count from the counter unit. 1. An apparatus for detecting speed of a motor , the apparatus comprising:an amplifier configured to amplify a two-phase sine-wave signal inputted from an encoder based on rotation of a motor;a first conversion unit configured to convert the two-phase sine-wave signal to a digital data;a second conversion unit configured to convert the two-phase sine-wave signal to a square-wave signal;a counter unit configured to accumulate by counting the square-wave signal; anda speed determination unit configured to determine a speed of the motor, by receiving the digital data from the first conversion unit and the accumulated count from the counter unit.2. The apparatus of claim 1 , whereinthe first conversion unit converts the two-phase sine wave signal to the digital data by a predetermined number of bits.3. The apparatus of claim 1 , wherein the speed determination unit includes:a first determination unit configured to determine a position angle in a pulse, by using the digital data;a second determination unit configured to determine a position angle with respect to a single rotation of the motor, by combining the position angle in a pulse and the accumulated count received from the counter unit; anda third determination unit configured to determine a speed of the motor, based on a change in position of the motor.4. The ...

CONTROL DEVICE FOR ELECTRIC COMPRESSOR

A control device for an electric compressor, capable of successfully controlling a drive motor of the compressor in response to the load fluctuation having complicated frequency components even when the motor is controlled in a sensorless manner, is provided. The control device for an electric compressor includes: a repetitive control portion to which a rotation speed difference between a target rotation speed of a motor which drives the compressor and the estimated rotation speed is input to perform a repetitive operation using the rotation speed difference of one preceding cycle of the compressor, thereby reducing the rotation speed difference; a pressure detecting portion for the compressor; and a reset signal generation portion calculating a timing of one rotation of the compressor by counting the number of predetermined parts of load fluctuations of the compressor based on the pressure value of the compressor, thereby outputting a reset signal to the repetitive control portion according to the timing. 1. A control device for an electric compressor comprising:a target rotation speed setting portion which sets a target rotation speed of a motor which drives the compressor;an estimated rotation speed calculation portion which calculates an estimated rotation speed of the motor;a drive command signal generation portion which generates a drive command signal of the electric motor to remove a rotation speed difference between the target rotation speed and the estimated rotation speed;a repetitive control portion to which the rotation speed difference is input to perform a repetitive operation using the rotation speed difference of one preceding cycle of the compressor, thereby reducing the rotation speed difference;a pressure detecting portion which detects a pressure value of the compressor; anda reset signal generation portion to which the pressure value of the compressor is input to calculate a timing of one rotation of the compressor by counting the number of ...

Motor driver control device

A position-command-pulse generation unit generates a position command pulse to be output to a motor driver by advancing an initial phase thereof by a phase indicated by initial phase information preset in a device. The initial phase information indicates an arbitrary phase in a period of a half cycle of a first pulse of the position command pulse.

Apparatus and method for controlling speed of motor

Disclosed herein are an apparatus and a method for controlling a speed of a motor. An apparatus for controlling a spaced of a motor according to an exemplary embodiment of the present invention includes: a PWM conversion unit detecting a hall sensor signal from a motor to output a pulse width modulated signal corresponding to the detected hall sensor signal; a duty detection unit detecting a duty value of the pulse width modulated signal output by the PWM conversion unit; an error calculation unit comparing a PWM duty input from the outside with a duty detected by the duty detection unit to obtain an error; and a speed control unit controlling a speed of a motor based on an error obtained by the error calculation unit.

Fan system—rotation speed control circuit and method for rotation speed error auto-calibration thereof

A rotation speed control circuit with function of auto-calibrating rotation speed error is disclosed. The rotation speed control circuit includes a first multiplexer, a second multiplexer, an error amplifier and a current compensation circuit. In calibration mode, the rotation speed control circuit selects a calibration clock signal and a calibration voltage through the first multiplexer and the second multiplexer correspondingly according to a mode switch signal, and adjusts current value of a first current accordingly. In other words, the rotation speed control circuit utilizes the first current to compensate error of the external capacitor through the calibration clock signal fixed and the calibration voltage fixed in the duration of calibration mode, so as to avoid that aging of the external capacitor leads to rotation speed error and then affects the whole operation.

Motor drive control apparatus

A host apparatus includes a command-pattern changing unit. A detector includes a detector-communication-parameter changing unit. A motor drive control apparatus includes a communication-parameter changing unit and a control-gain changing unit. The command-pattern changing unit, the detector-communication-parameter changing unit, and the communication-parameter changing unit change, based on determination of detector communication by a communication-abnormality determining unit, plural communication parameters, control gains, and command patterns, which are determined in advance, in synchronization with one another to control drive of a motor.

Control device for electric compressor

A control device for an electric compressor, capable of successfully controlling a drive motor of the compressor in response to the load fluctuation having complicated frequency components even when the motor is controlled in a sensorless manner, is provided. The control device for an electric compressor includes: a repetitive control portion 5 to which a rotation speed difference between a target rotation speed of a motor which drives the compressor and the estimated rotation speed is input to perform a repetitive operation using the rotation speed difference of one preceding cycle of the compressor, thereby reducing the rotation speed difference; a pressure detecting portion 1 for the compressor; and a reset signal generation portion 4 calculating a timing of one rotation of the compressor by counting the number of predetermined parts of load fluctuations of the compressor based on the pressure value of the compressor, thereby outputting a reset signal to the repetitive control portion according to the timing.

Apparatus for detecting speed of motor

An apparatus for detecting speed of a motor is disclosed, the apparatus including an amplifier configured to amplify a two-phase sine-wave signal inputted from an encoder based on rotation of a motor; a first conversion unit configured to convert the two-phase sine-wave signal to a digital data; a second conversion unit configured to convert the two-phase sine-wave signal to a square-wave signal; a counter unit configured to accumulate by counting the square-wave signal; and a speed determination unit configured to determine a speed of the motor, by receiving the digital data from the first conversion unit and the accumulated count from the counter unit.