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The switched reluctance motor (SRM) exhibits desirable features including simple construction, high reliability, and low cost. However, the SRM has not been put into practical applications widely because of its large torque ripple, acoustic noise, and low power factor. Furthermore, the quantitative analysis and optimum design of the SRM have not been clarified thoroughly. In this paper, the authors propose one method for calculating the operating characteristics of the SRM based on SPICE, the general-purpose circuit simulation program. The calculated results obtained in the trial 8/6 SRM show good agreement with the experimental ones. The method is useful for optimum design of the SRM. © 2002 Wiley Periodicals, Inc. Electr Eng Jpn, 142(1): 50–56, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ eej.10092 [ABSTRACT FROM AUTHOR]

Although the reluctance motors are attractive from the standpoints of simple construction and drive electronics, the relatively high torque ripple and acoustic noise are major drawbacks. These drawbacks limit motor applications. In this paper, the torque ripple suppression of the reluctance motor under the sinusoidal current drive is examined. The analysis shows that the torque ripple is caused by the spatial harmonics of inductance. One approach is based on the compensation current generated with the spatial harmonics of inductance. Another is based on the modification of rotor tooth configuration to eliminate the spatial harmonics. According to the proposed strategies, torque ripple suppression characteristics can be evaluated at the design stage of the motor. Both approaches have been verified by experiments. © 1999 Scripta Technica, Electr Eng Jpn, 130(1): 118–128, 2000 [ABSTRACT FROM AUTHOR]

The authors and others developed a 15 kW revolving-armature type commutatorless motor deriving high magnetic loading. The commutatorless motor was first manufactured with interpole and compensating windings having a construction allowing easy installation and removal of interpoles. It was found from this experiment that this motor was improved in overload torque and the effect of interpoles did not affect compensating windings of the spare angle improvement. Therefore, the compound commutatorless motor (with compensating windings) was manufactured as an experiment. A high output of 190% power was derived by this motor and compensating windings were not needed. By characteristics analysis and simulation, the main factor by which this high output was obtained was that the leakage reactance Xl of this motor was half that of old commutatorless motors. This paper reports this effect, including the experimental data. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 120(2): 82–95, 1997 [ABSTRACT FROM AUTHOR]