A Phase Current Sampling Strategy for Multiphase Switched Reluctance Machines by Pulses Injection and Multi-Frequency Pluse Auxiliary

A novel current sampling control strategy is put forward for multiphase switched reluctance machines (SRMs) in this paper to minimize the usage of current sensors in multiphase SRM drive systems. By injecting multi-frequency pulses, phase currents can be obtained respectively by detecting the split DC-link current when current overlapping occurs. Hence, the number of current sensors in multiphase SRM systems can be greatly reduced, and no additional devices or circuits are needed. So, the cost of the multiphase SRM drive system can be reduced. The accuracy of the proposed method is confirmed by simulation results.