Fault tolerant control of five-phase permanent magnet assisted synchronous reluctance motor based on dynamic current phase advance

Abstract

In this paper, fault tolerant control of a five-phase permanent magnet assisted synchronous reluctance motor (PMa-SynRM) has been discussed. Reliable control method under any fault conditions has been predominantly required in critical applications such as hybrid/electric vehicular applications and aerospace industries. The proposed method utilizes the advance vector control of multiphase machine to provide maximum amount of torque under different types of open phase fault conditions. To maximize the amount of torque, the current phase advance in the five-phase reluctance machine has been introduced which varies with saturation effects and load dynamic behavior. Under such condition, the phase advance has been calculated dynamically at different faults and load conditions. Considering that, the optimal set of currents has been injected to provide maximum amount of torque under different open phase fault conditions. Extensive theoretical analysis along with Finite element methods has been carried out to support the proposed method. The experimental results have been provided utilizing the 5hp dynamo system which consists of TI DSP control board and five-phase inverter system.