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Bi-level Control and Chopper Control Methods for Improving the Dynamic Performance of Stepper Motor
Walid M. Emar, Ziad Sobih, Musbah Aqel, Mahmoud S. Awad
Pages - 149 - 159     |    Revised - 30-04-2010     |    Published - 10-06-2010
Volume - 4   Issue - 2    |    Publication Date - May 2010  Table of Contents
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KEYWORDS
Stepper motor, Variable reluctance motor, time constant, Chopper converter, Chopper control., Novel topology
ABSTRACT
This paper presents a new topology of drive circuitry for variable reluctance stepping motors (VRSM) for improving the performance of such motor by modifying its time constant and thus, increasing its stepping rate. Therefore, the initial torque developed by the motor is high; the switching from one coil to the next is faster than normal and consequently, the rotor moves as quickly as it should be. The circuitry discussed in this paper is connected directly to the motor windings and the motor power supply, and this circuitry is controlled by a digital system that determines when the switches are turned on or off. This paper also covers the basic principles of stepping motors and stepping motor control systems. It focuses on a four winding variable reluctance motor (VRSM), from the elementary circuitry needed to control its speed, to the methods used for improving its time constant and stepping rate [1-5].
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Dr. Walid M. Emar
Isra Un. - Jordan
walidemar@yahoo.com
Mr. Ziad Sobih
- United States of America
Mr. Musbah Aqel
- Amman
Mr. Mahmoud S. Awad
- Amman