VHDL-AMS-based modeling of an asymmetric H-type half-bridge converter for mutually coupled SRM

Abstract

Nowadays, mutually coupled reluctance machine (MCSRM), which produces further torque compare to classical switched reluctance machine (SRM), has acquired a deserving value and importance thanks to developing technology and control algorithm. While torque is produced through the changing of self-inductance at classical SRM, it depends on mutual inductance that occurs between phases at MCSRM. Determination of the inductance and transferring of it to the converter model correctly are quiet important, since the machine torque has directly varied by inductance value. There are various methods on SRM drives modeling such as look-up table, manipulated by the variation of inductance value in the literature. However, exact modeling can be possible with transferring of the inductance values acquired from the machine static analysis to the model smoothly. In order to achieve that, it is proposed a “Very high-speed integrated circuit Hardware Description Language-Analog Mixed Signal” (VHDL-AMS) based modeling method for an asymmetric H-type half-bridge converter as a MCSRM drive in this study. Mutual inductance values are calculated by VHDL-AMS, according to phase current and angle of the machine rotor. Consequently, inductance that varies depending upon the machine rotor position is determined by the proposed method dynamically.