EPE Association: EPE 1993 - 21 - Lecture Session L7c: DRIVES: SERVOS AND SPECIAL DRIVES

EPE 1993 - 21 - Lecture Session L7c: DRIVES: SERVOS AND SPECIAL DRIVES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1993 - Conference > EPE 1993 - 21 - Lecture Session L7c: DRIVES: SERVOS AND SPECIAL DRIVES

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   A SWITCHED-RELUCTANCE SERVO DRIVE
By M. Stiebler; S. Gotovac [View]
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Abstract: Switched-reluctance motors (SRM) have been proposed for many applications from domestic appliances to traction drives. While their benefits have been pointed out in many publications, problems with torque oscillations and audible noise are normally mentioned as drawbacks compared with other concepts. In this respect the SRM would not appear to be a candidate for servo drives. This paper reports results of a project, in which such a motor was given an optimized design and appropriate supply and control, so as to meet the requirements of a servo drive. The results obtained from a prototype show the possibilities and limitations of a SRM for this application.

   COMPARISION OF DISTURBANCE SUPPRESSION STRATEGIES FOR SERVO-DRIVES
By U. Probst [View]
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Abstract: In this paper different control structures for servo drives are compared regarding their disturbance suppression capabilities. Starting with the classical cascade control for position, velocity and current alternative concepts are reviewed. All presented control structures are simulated as time discrete control algorithms. Comparision is done with respect to a performance index for position errors. Though cascade control structure was optimized for good disturbance suppression, all simulated control schemes showed better dynamic performance. In case of a faultless optical encoder, state variable feedback of acceleration gives best results.

   CASCADED POSITION CONTROL FOR AN INTELLIGENT SYNCHRONOUS SERVODRIVE USING FUZZY LOGIC
By D. Naunin; C. Karaali [View]
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Abstract: The flexible architecture of modern microcontrollers gives the opportunity to develop an intelligent motor with minimal hardware investment. The intelligent motor has the complete hardware on its case, i.e. the microcontroller, the memory management, the voltage source inverter, the current and position measurement units and the incremental encoder. The servodrive has a permanent magnet synchron motor with a three phase stator winding. In this paper a completely digital cascaded position control for this servodrive is presented. Results of the cascaded position control and fuzzy control investigations of the servodrive are shown.

   DRIVER CIRCUIT FOR PIEZOELECTRIC MOTOR
By M. Crivii; M. Jufer [View]
[Download]

Abstract: For a piezoelectric motor operation, a high frequency power driver with high voltage is required. An optimum operation is possible if the supplied current is sinusoidal. In this case a resonant converter must be used. This paper presents a design and experimental results of DC-AC resonant converter system. The equivalent circuit for the converter and for the piezoelectric motor is used to simulate a converter operation and to determine its optimal parameters. The experimental and simulated results are presented.

EPE 1993 - 21 - Lecture Session L7c: DRIVES: SERVOS AND SPECIAL DRIVES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1993 - Conference > EPE 1993 - 21 - Lecture Session L7c: DRIVES: SERVOS AND SPECIAL DRIVES
	[return to parent folder]

	A SWITCHED-RELUCTANCE SERVO DRIVE By M. Stiebler; S. Gotovac	[View] [Download]
Abstract: Switched-reluctance motors (SRM) have been proposed for many applications from domestic appliances to traction drives. While their benefits have been pointed out in many publications, problems with torque oscillations and audible noise are normally mentioned as drawbacks compared with other concepts. In this respect the SRM would not appear to be a candidate for servo drives. This paper reports results of a project, in which such a motor was given an optimized design and appropriate supply and control, so as to meet the requirements of a servo drive. The results obtained from a prototype show the possibilities and limitations of a SRM for this application.

	COMPARISION OF DISTURBANCE SUPPRESSION STRATEGIES FOR SERVO-DRIVES By U. Probst	[View] [Download]
Abstract: In this paper different control structures for servo drives are compared regarding their disturbance suppression capabilities. Starting with the classical cascade control for position, velocity and current alternative concepts are reviewed. All presented control structures are simulated as time discrete control algorithms. Comparision is done with respect to a performance index for position errors. Though cascade control structure was optimized for good disturbance suppression, all simulated control schemes showed better dynamic performance. In case of a faultless optical encoder, state variable feedback of acceleration gives best results.

	CASCADED POSITION CONTROL FOR AN INTELLIGENT SYNCHRONOUS SERVODRIVE USING FUZZY LOGIC By D. Naunin; C. Karaali	[View] [Download]
Abstract: The flexible architecture of modern microcontrollers gives the opportunity to develop an intelligent motor with minimal hardware investment. The intelligent motor has the complete hardware on its case, i.e. the microcontroller, the memory management, the voltage source inverter, the current and position measurement units and the incremental encoder. The servodrive has a permanent magnet synchron motor with a three phase stator winding. In this paper a completely digital cascaded position control for this servodrive is presented. Results of the cascaded position control and fuzzy control investigations of the servodrive are shown.

	DRIVER CIRCUIT FOR PIEZOELECTRIC MOTOR By M. Crivii; M. Jufer	[View] [Download]
Abstract: For a piezoelectric motor operation, a high frequency power driver with high voltage is required. An optimum operation is possible if the supplied current is sinusoidal. In this case a resonant converter must be used. This paper presents a design and experimental results of DC-AC resonant converter system. The equivalent circuit for the converter and for the piezoelectric motor is used to simulate a converter operation and to determine its optimal parameters. The experimental and simulated results are presented.