Design Optimization of Switched Reluctance Machines Operating Under Voltage PWM Control Strategy

Abstract

Because of inherent interdepencdence between magnetic design and control of switched reluctance machines (SRMs), change of modulation (control) strategy leads to different optimum designs. Modulation variables added to machine design parameters increase search-space dimensions and bring more complications in machine design problem. This paper intends to identify some relationships among machine design parameters, modulation variables and machine outputs for a selected modulation strategy (here, voltage PWM) to reduce search and computation burden in design process. These relationships are used to develop novel SRM synthesis algorithms which are employed elaborately in SRM design optimization. Moreover, as drives in most of applications operate normally at a number of operating points, the SRM design is optimized in terms of the global machine-drive performance over an operating region.