Fault Analysis of Dual Rotor Permanent Magnet Flux Switching Machine

Abstract

Dual Rotor Permanent magnet flux switching machines are required where high torque density and plenty of driving modes are required. The dual-rotor PMFSM consists of a single stator shared by an inner rotor and outer rotor. A magnetic coupling exists between the inner and outer rotors, which makes this machine less fault tolerant and reduces its performance. The previous knowledge of behavior of machine under different fault conditions is the basis of evaluation of the effects of faults on the machine. The main parameters of the machine whose transient behaviors must be studied under fault conditions are voltage, current and torque. Phase open circuit, phase short circuit, high impedance, magnet falling off and demagnetization faults are simulated using JMAG (FEA) tool.