EPE Association: EPE 1987 - 12 - Lecture Session 1.12: MODELLING AND SIMULATION (I)

EPE 1987 - 12 - Lecture Session 1.12: MODELLING AND SIMULATION (I)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 12 - Lecture Session 1.12: MODELLING AND SIMULATION (I)

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   NEW CONCEPTS IN TEACHING ON POWER ELECTRONICS APPLICATIONS
By Ph. Lataire; G. Maggetto [View]
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Abstract: This paper discusses a project concerning the introduction of informatics and automatic control in giving guidance to students and in their follow up during their practical exercises on electrical engineering. The aim is on the one hand to improve the teaching quality on electrical engineering and on the other hand to make the most of these exercices to familiarize the students with related scientific topics: measurement and control engineering, automation and computerization, informatics, power electronics.

   STATIC CONVERTERS SIMULATOR
By Michel Metz; Pierre Marty; Bernard Escaut [View]
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Abstract: This paper presents a specialized simulator of power static converters which allows a physical approach of the phenomena and constitutes a versatile tool for the education and research. This simulator is realised by means of analog operators and real switches. Operation principle and main properties are described. Different possible services are illustrated by four examples.

   The use of controlmodels at power electronic drives
By H. Mijnarends; W. Deleroi [View]
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Abstract: The TUD developed a good and userfriendly method of modelling of control systems called PSI. A major contribution has been delivered by P. P. J. van den Bosch. The system enables us to apply limiters and non-linear functions. The 4 described studies have been verified with a real model, the results show sometimes important differences with the litterature.
Study 1: Speedcontrol with a 3-phase-bridge and a Dc-motor. The bridge-circuit has been used for motor and generator purpose. Parameters were: uninterrupted DC-current, interrupted DC-current, small and big commutation reactance. The original system showed damped oscillations as stepresponse-answer to the speedreference. The modified system has less than 5% overshoot and is much faster. Without limiter no satisfactory results were possible. The system consists of the well-known 2-loopsystem with an inner currentloop and an outer speedloop.
Study 2: Speedcontrol of a currentinvertor with a squirrelcage inductionmotor. With a slightly modified circuit of study 1 we could build a good model of the current-invertor which showed less than 10% difference to the real system. The motorcurrent has been limited to 125% In; uninterrupted DC-current did not occur. The statorvoltage of the machine had been kept linear to the statorfrequency. So the motorinduction changes from motor to generatordrive; the downstep is faster.

   COMPUTER SIMULATION OF A SINGLE-PULSE CYCLOCONVERTER AC MOTOR DRIVE
By Sydney Lloyd; Peter J. Unsworth; Adel Sadeq [View]
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Abstract: The paper describes the operation of a new type of 3-phase to 3-phase cycloconverter which utilises the six thyristor configuration of the industry standard "soft start" induction motor starter. Performance of this new cycloconverter in its application to induction motor speed control is investigated by means of a computer simulation and the results obtained compare favourably with these obtained from a practical system.

EPE 1987 - 12 - Lecture Session 1.12: MODELLING AND SIMULATION (I)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 12 - Lecture Session 1.12: MODELLING AND SIMULATION (I)
	[return to parent folder]

	NEW CONCEPTS IN TEACHING ON POWER ELECTRONICS APPLICATIONS By Ph. Lataire; G. Maggetto	[View] [Download]
Abstract: This paper discusses a project concerning the introduction of informatics and automatic control in giving guidance to students and in their follow up during their practical exercises on electrical engineering. The aim is on the one hand to improve the teaching quality on electrical engineering and on the other hand to make the most of these exercices to familiarize the students with related scientific topics: measurement and control engineering, automation and computerization, informatics, power electronics.

	STATIC CONVERTERS SIMULATOR By Michel Metz; Pierre Marty; Bernard Escaut	[View] [Download]
Abstract: This paper presents a specialized simulator of power static converters which allows a physical approach of the phenomena and constitutes a versatile tool for the education and research. This simulator is realised by means of analog operators and real switches. Operation principle and main properties are described. Different possible services are illustrated by four examples.

	The use of controlmodels at power electronic drives By H. Mijnarends; W. Deleroi	[View] [Download]
Abstract: The TUD developed a good and userfriendly method of modelling of control systems called PSI. A major contribution has been delivered by P. P. J. van den Bosch. The system enables us to apply limiters and non-linear functions. The 4 described studies have been verified with a real model, the results show sometimes important differences with the litterature. Study 1: Speedcontrol with a 3-phase-bridge and a Dc-motor. The bridge-circuit has been used for motor and generator purpose. Parameters were: uninterrupted DC-current, interrupted DC-current, small and big commutation reactance. The original system showed damped oscillations as stepresponse-answer to the speedreference. The modified system has less than 5% overshoot and is much faster. Without limiter no satisfactory results were possible. The system consists of the well-known 2-loopsystem with an inner currentloop and an outer speedloop. Study 2: Speedcontrol of a currentinvertor with a squirrelcage inductionmotor. With a slightly modified circuit of study 1 we could build a good model of the current-invertor which showed less than 10% difference to the real system. The motorcurrent has been limited to 125% In; uninterrupted DC-current did not occur. The statorvoltage of the machine had been kept linear to the statorfrequency. So the motorinduction changes from motor to generatordrive; the downstep is faster.

	COMPUTER SIMULATION OF A SINGLE-PULSE CYCLOCONVERTER AC MOTOR DRIVE By Sydney Lloyd; Peter J. Unsworth; Adel Sadeq	[View] [Download]
Abstract: The paper describes the operation of a new type of 3-phase to 3-phase cycloconverter which utilises the six thyristor configuration of the industry standard "soft start" induction motor starter. Performance of this new cycloconverter in its application to induction motor speed control is investigated by means of a computer simulation and the results obtained compare favourably with these obtained from a practical system.