Predictive Current Control of Mutually Coupled Switched Reluctance Motors Using Net Flux Method

This work presents a fixed switching frequency predictive current controller for Mutually Coupled Switched Reluctance Machines (MCSRMs). For high performance applications requiring high precision torque control, it is necessary to have high bandwidth current regulators. This can be satisfied by using a digital deadbeat control strategy. Since the controller is model based, it is essential to estimate the mutual flux accurately. This can be challenging in the case of reluctance machines because of the magnetic non-linearity, especially in the saturation region. In order to have an accurate reference current tracking, the controller is developed on the machine model which is based on the Net Flux Method (NFM). Dynamic simulations are carried out in Matlab/Simulink to control a 12/8, 1 HP MCSRM. The results are presented and compared with the performance of proportional integral (PI) controller.