EPE Association: EPE 1987 - 27 - Lecture Session 4.2: INDUSTRIAL APPLICATIONS (II)

EPE 1987 - 27 - Lecture Session 4.2: INDUSTRIAL APPLICATIONS (II)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 27 - Lecture Session 4.2: INDUSTRIAL APPLICATIONS (II)

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   INDUSTRIAL APPLICATIONS OF CYCLOCONVERTERS
By P. Obermeyer; J.-L. Pouliquen [View]
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Abstract: The adjustable-speed heavy-duty drives by electric motors use increasingly alternating-current motors, essentially the synchronous motor. The control of such drives has to take into account the electrotechnical performance of the motors and provide in particular for armature reaction flux compensation. In the present article, we are describing the power and monitoring circuits for cycloconverters used in various industrial applications.

   FULLY DIGITAL CONTROLLED INDUCTION MOTORS FOR MACHINE TOOL APPLICATIONS
By Gerhard Kobs; Ralph Kennel; Peter Zimmermann [View]
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Abstract: The use of machine tools in flexible automation increases the requirements on spindle drives in terms of reliability and availability. Today the DC drive with speed control is a standard solution. Brushless drives are the state of the art in servo applications. Frequency controlled asynchronous machines supplied by transistor inverters are beginning to enter the area of brushless spindle drives. Urged by the demands of high reliability, ease of servicing, simple installing, high speed and a wide range of constant power to economize gear trains, several producers offer AC spindle drives to replace the DC drives. To get the same control behaviour it is necessary to use a sophisticated control algorithm which can be handled by a microcomputer much better than by analogue circuits. Using microcomputers the problem of calculation time arises. For this reason in many applications digital speed control loops are combined with analogue current control loops. In this paper a microcomputer controlled AC drive with fully digital controlled induction motor is presented. Optimizing the software structure it is possible to use only one standard industrial type of microprocessor in this drive, which will be a serial product in 1988.

   INDUSTRIAL DESIGN OF SPEED-CONTROL DEVICES FOR DIGITALLY-CONTROLLED ASYNCHRONOUS MOTORS
By François Puchar [View]
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Abstract: Our proposal does not simply consist of enlarging on the numerous theoretical works which have been carried out in this field, but in illustrating the possible improvements gained in an industrial environment. Using these theoretical bases, the manufacturer must achieve the best compromise between performance, cost, ease of maintenance and adjustment. At the same time, he must ensure the flexibility and ease of use of the algorithms used for various applications. In the proposed article, we shall give a summary of the restrictions imposed by an industrial design. We shall indicate our choices and analyze the results obtained.

   CYCLOCONVERTER FED HIGH PERFORMANCE INDUCTION MOTORS FOR ROLLING STEEL MILL DRIVES
By A. Brickwedde [View]
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Abstract: Cycloconverter fed squirrel cage induction motors can successfully replace conventional d.c. motors; sophisticated control algorithms such as vector-control guarantee a dynamic performance which is as good as that of d.c. drives. All control functions such as twin drive, digital speed and current control as well as the flux model, EMF-compensation and diagnostic functions are implemented on a powerful Programmable High Speed Control System (PHSC). The described variable speed drive system is successfully operating as a twin drive stand for a temper mill. Experimental results gained from rolling steel mill operation are presented.

EPE 1987 - 27 - Lecture Session 4.2: INDUSTRIAL APPLICATIONS (II)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 27 - Lecture Session 4.2: INDUSTRIAL APPLICATIONS (II)
	[return to parent folder]

	INDUSTRIAL APPLICATIONS OF CYCLOCONVERTERS By P. Obermeyer; J.-L. Pouliquen	[View] [Download]
Abstract: The adjustable-speed heavy-duty drives by electric motors use increasingly alternating-current motors, essentially the synchronous motor. The control of such drives has to take into account the electrotechnical performance of the motors and provide in particular for armature reaction flux compensation. In the present article, we are describing the power and monitoring circuits for cycloconverters used in various industrial applications.

	FULLY DIGITAL CONTROLLED INDUCTION MOTORS FOR MACHINE TOOL APPLICATIONS By Gerhard Kobs; Ralph Kennel; Peter Zimmermann	[View] [Download]
Abstract: The use of machine tools in flexible automation increases the requirements on spindle drives in terms of reliability and availability. Today the DC drive with speed control is a standard solution. Brushless drives are the state of the art in servo applications. Frequency controlled asynchronous machines supplied by transistor inverters are beginning to enter the area of brushless spindle drives. Urged by the demands of high reliability, ease of servicing, simple installing, high speed and a wide range of constant power to economize gear trains, several producers offer AC spindle drives to replace the DC drives. To get the same control behaviour it is necessary to use a sophisticated control algorithm which can be handled by a microcomputer much better than by analogue circuits. Using microcomputers the problem of calculation time arises. For this reason in many applications digital speed control loops are combined with analogue current control loops. In this paper a microcomputer controlled AC drive with fully digital controlled induction motor is presented. Optimizing the software structure it is possible to use only one standard industrial type of microprocessor in this drive, which will be a serial product in 1988.

	INDUSTRIAL DESIGN OF SPEED-CONTROL DEVICES FOR DIGITALLY-CONTROLLED ASYNCHRONOUS MOTORS By François Puchar	[View] [Download]
Abstract: Our proposal does not simply consist of enlarging on the numerous theoretical works which have been carried out in this field, but in illustrating the possible improvements gained in an industrial environment. Using these theoretical bases, the manufacturer must achieve the best compromise between performance, cost, ease of maintenance and adjustment. At the same time, he must ensure the flexibility and ease of use of the algorithms used for various applications. In the proposed article, we shall give a summary of the restrictions imposed by an industrial design. We shall indicate our choices and analyze the results obtained.

	CYCLOCONVERTER FED HIGH PERFORMANCE INDUCTION MOTORS FOR ROLLING STEEL MILL DRIVES By A. Brickwedde	[View] [Download]
Abstract: Cycloconverter fed squirrel cage induction motors can successfully replace conventional d.c. motors; sophisticated control algorithms such as vector-control guarantee a dynamic performance which is as good as that of d.c. drives. All control functions such as twin drive, digital speed and current control as well as the flux model, EMF-compensation and diagnostic functions are implemented on a powerful Programmable High Speed Control System (PHSC). The described variable speed drive system is successfully operating as a twin drive stand for a temper mill. Experimental results gained from rolling steel mill operation are presented.