Dynamic Modeling and Performance Prediction for Dual-Channel Switched Reluctance Machine Considering Mutual Coupling

Abstract

Switched reluctance machines (SRMs) are normally designed and applied as 6/4 or 8/6 single-channel SRMs. However, recent efforts with 12/8 dual-channel SRMs (DCSRMs) have spurred interest. The 12/8 DCSRM is driven by two independent sets of power electronic circuits with dual control channels, and the two channels would have strong interactions between each other due to the magnetic mutual coupling for each channel. We propose a dynamic modeling strategy that accounts for the effect of mutual coupling of a DCSRM. First, we illustrate the flux patterns of a DCSRM under different operation modes. Then, we use an indirect experimental procedure to measure the static self and mutual flux linkages for the DCSRM. By using the measured flux linkage data, we describe a simulation model for a DCSRM operating in single-channel mode and dual-channel mode in which the mutual coupling is considered. We predict and compare the dynamic performance characteristics such as phase currents, flux linkages, energy conversion, and static torque under different operation modes and excitation conditions. Finally, we compare the simulation and experimental results for four operating conditions in DCSRM systems in single-channel mode and dual-channel mode. The proposed modeling strategy for the DCSRM is quite accurate.