The main issue of the switched reluctance motor (SRM) is its noise and vibration caused by high torque ripples on rotor’s shaft. Many methods have been developed for improving characteristic SRM. For example, design optimization one promising approaches to reduction Particularly, topology (TO) stator rotor can be highly beneficial addressing ripple issue. However, TO SRM appears computationally...

The paper discusses the design of current waveforms for switched-reluctance motors, which give rise to a constant (ripple-free) torque. The waveforms are optimised by computer search techniques, to give the lowest RMS current per phase consistent with producing smooth torque. Furthermore. the waveforms are constrained to be within the converter’s VA rating. Current waveforms and the associated ...

Abstruct-This paper describes a new and machine-indepenThe SRM is usually voltage controlled or current controlled. dent method to minimize the energy consumption of a speed controlled Switched Reluctance Motor (SRM). The control strategy is to vary the duty cycle of the applied dc voltage in order to obtain the desired speed quickly and when operating in steadystate vary the turn-on angle (ao,...

November 2003 The L297 Stepper Motor Controller is primarily intended for use with an L298N or L293E bridge driver in stepper motor driving applications. It receives control signals from the system’s controller, usually a microcomputer chip, and provides all the necessary drive signals for the power stage. Additionally, it includes two PWM chopper circuits to regulate the current in the motor w...

An operation of any electromechanical device, in that number electric machines, it is electric motors and generators, can be seen as: a) An impact of magnetic field on a piece of ferromagnetic material, b) An interaction of two magnetic fields: magnetic field of primary part and magnetic field of secondary part; the secondary magnetic field can be generated: either by a current flowing in a win...

This paper addresses a basic control issue in switched reluctance motor (SRM) drives—the production of a ripple-free torque. Simple and largely model-independent conventional supply waveforms are not able to satisfy this requirement. The goal of this paper is to improve SRM dynamical performance by compensating for motor nonlinearities, while maintaining the robustness of conventional methods. ...

Simulations are widely used in the study of both electrical machines and drives. In the literature, several simulation approaches can be found which can be also applied in the study of the switched reluctance motors (SRMs). The on-line SRM simulation tool developed by the authors and presented in this paper proved to be very useful both in checking the design of the motor, but also in setting u...

This paper addresses torque-ripple reduction in current-fed switched reluctance motors (SRMs). Ripple-free torque production in SRMs requires an accurate model that is often too complex for practical implementation. The algorithm proposed here combines the use of a simplified model with adaptation. Explicitly, it includes dynamic estimation of low harmonics of the combined unknown load torque a...

The generated torque ripple in switched reluctance motors (SRM) can be considered as one of the major disadvantages of the motor. It is mainly due to frequent switching of phases for rotation of the motor and changes of the air gap length between the rotor and stator teeth. It decreases the average developed torque, diminish the efficiency, causes noise and vibration in the motor. So, in order ...

The paper discusses the design of optimised current waveforms, to give the lowest RMS current per phase for a given mean torque. The waveforms are constrained to be within the converter VA rating. Current waveforms and the associated voltage waveform, over a wide speed range, are given for a representative motor.