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In order to improve the performance of switched reluctance motor (SRM) drives, some advanced control strategies have been proposed, such as current or flux linkage profile control. To achieve these strategies the motor phase current or phase flux linkage should be controlled precisely. All these require increasing the switching frequency of converter to upgrade stability and dynamic response speed...
Plasma cutting power supplies in the power range 20 kW and above commonly use the hard-switched buck converter topology. This topology is simple and efficient when compared with SCR based methods. In addition, circuit reliability is achieved by using current controlled PWM technique at a typical switching frequency of 15 kHz. It is however estimated that device switching losses make up about two-thirds...
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