EPE Association: EPE 1985 - 18 - Lecture Session 3.04: SPEED CONTROL OF INVERTER-FED INDUCTION MOTOR DRIVES

EPE 1985 - 18 - Lecture Session 3.04: SPEED CONTROL OF INVERTER-FED INDUCTION MOTOR DRIVES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1985 - Conference > EPE 1985 - 18 - Lecture Session 3.04: SPEED CONTROL OF INVERTER-FED INDUCTION MOTOR DRIVES

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   WIDE SPEED RANGE INDUCTION MOTOR DRIVE WITH VECTOR CONTROL TRANSISTOR CONVERTER
By D. Stanciu; St. Gavat; V. Tudor [View]
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Abstract: The paper presents some theoretical problems concerning vector control of the induction motor stator current, at constant rotor flux. In this way, a stator current component is constant. It results a better dynamic response, with a simpler control diagram, because the input values determine without delay the torque. The identical structure of the speed loop, for both a current controlled induction motor and a d.c. one with independent excitation is rendered evident. Experimental results are also presented, obtained with induction motor drive, using sinusoidal control of the stator current. The vector control has been obtained in two versions: a digital and an analog one. With both versions a control range of 1 : 10(4) has been obtained. The dynamic response, at low signals, including low speed, and low speed reversal is similar to a d.c. motor drive. Such performances make it possible to be used in the field of feed and spindle drives for machine-tools.

   COMMANDE NUMERIQUE DE VITESSE D'UNE MACHINE ASYNCHRONE / DIGITAL SPEED CONTROL OF AN ASYNCHRONOUS MACHINE
By B. de Fornel; J. C. Hapiot; R. Kowalczyk [View]
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Abstract: In this paper, the study and the reaIization of a speed regulation for an induction machine without speed sensor is showed. The machine is current-fed by a static converter. A non linear control law is defined. This law is characterised by a decoupling control between flux and torque. The dynamic behaviour of the system is independant of the operating point. The control characteristics are defined with the aid of a numerical program (SECMA). The control laws are set on a microprocessor. Experimental results are obtained with a 4. 4 Kw induction machine.

   ROBUST SPEED CONTROL OF AN A.C. MOTOR WITH FIELD WEAKENING
By P. Feller [View]
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Abstract: Using a stator current controller with a complete decoupling of both components allows to superpose independent flux and speed controllers. In case of field weakening, the dynamic behaviour of the speed control circuit is depending on the rotor flux value. In order to avoid the development of an adaptative controller, a robust speed controller based on a state feedback control structure is developped to keep a good dynamic behaviour for a large variation of the flux.

EPE 1985 - 18 - Lecture Session 3.04: SPEED CONTROL OF INVERTER-FED INDUCTION MOTOR DRIVES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1985 - Conference > EPE 1985 - 18 - Lecture Session 3.04: SPEED CONTROL OF INVERTER-FED INDUCTION MOTOR DRIVES
	[return to parent folder]

	WIDE SPEED RANGE INDUCTION MOTOR DRIVE WITH VECTOR CONTROL TRANSISTOR CONVERTER By D. Stanciu; St. Gavat; V. Tudor	[View] [Download]
Abstract: The paper presents some theoretical problems concerning vector control of the induction motor stator current, at constant rotor flux. In this way, a stator current component is constant. It results a better dynamic response, with a simpler control diagram, because the input values determine without delay the torque. The identical structure of the speed loop, for both a current controlled induction motor and a d.c. one with independent excitation is rendered evident. Experimental results are also presented, obtained with induction motor drive, using sinusoidal control of the stator current. The vector control has been obtained in two versions: a digital and an analog one. With both versions a control range of 1 : 10(4) has been obtained. The dynamic response, at low signals, including low speed, and low speed reversal is similar to a d.c. motor drive. Such performances make it possible to be used in the field of feed and spindle drives for machine-tools.

	COMMANDE NUMERIQUE DE VITESSE D'UNE MACHINE ASYNCHRONE / DIGITAL SPEED CONTROL OF AN ASYNCHRONOUS MACHINE By B. de Fornel; J. C. Hapiot; R. Kowalczyk	[View] [Download]
Abstract: In this paper, the study and the reaIization of a speed regulation for an induction machine without speed sensor is showed. The machine is current-fed by a static converter. A non linear control law is defined. This law is characterised by a decoupling control between flux and torque. The dynamic behaviour of the system is independant of the operating point. The control characteristics are defined with the aid of a numerical program (SECMA). The control laws are set on a microprocessor. Experimental results are obtained with a 4. 4 Kw induction machine.

	ROBUST SPEED CONTROL OF AN A.C. MOTOR WITH FIELD WEAKENING By P. Feller	[View] [Download]
Abstract: Using a stator current controller with a complete decoupling of both components allows to superpose independent flux and speed controllers. In case of field weakening, the dynamic behaviour of the speed control circuit is depending on the rotor flux value. In order to avoid the development of an adaptative controller, a robust speed controller based on a state feedback control structure is developped to keep a good dynamic behaviour for a large variation of the flux.