Finite Control Set Mpc For Open-phase Fault Tolerant Control Of Pm Synchronous Motor Drives

Finite Control Set MPC for Open-Phase Fault Tolerant Control of PM Synchronous Motor Drives

Abstract:   

A fault-tolerant permanent magnet synchronous motor drive is proposed in this paper. The strategy is based on finite control-set model predictive control (FCS-MPC) that is easy to implement and replaces the conventional PI controllers and PWM modulators. A three-phase four-wire converter topology is used, which connects the neutral of the motor to the middle of the DC-link in a capacitive divider. The main contribution of the proposed strategy relies on the fact that no reconfigurations or modifications of the converter topology and controller strategy are required from normal operation to post-fault operation. As result, the transition from healthy to faulty state is smooth and not noticeable in the torque waveform. In addition, a simple fault detection method is derived by using the predicted variables.  .