This paper presents the open-circuit fault tolerant of 20-slot/4-pole, five-phase, surface-mounted permanent magnet synchronous machines (PMSM). The five-phase PMSM can be an attractive solution for certain applications requiring fault tolerance capability, such as in renewable energy and electric or hybrid vehicles. The objective of this study is to evaluate, depending on the type of winding, the performance of five-phase permanent magnet synchronous machines in the presence of an open circuit fault. A 2D finite element analysis (FEA) is performed using JMAG Designer. The key performance indicators are examined in both healthy and faulted condition, including magnetic flux density distribution, harmonic spectrum analysis, cogging torque, and electromagnetic torque. The results show that the concentrated winding offers better tolerance to open-circuit faults, mainly due to reduced magnetic disturbance and lower torque ripple during fault operation. The average electromagnetic torques for a distributed winding under healthy and fault conditions are 40.89 Nm and 34.69 Nm, respectively, with torque ripples of 9.89% and 44.3% under fault conditions. For the concentrated winding, the average electromagnetic torque values are 18.58 Nm and 17.67 Nm, respectively, resulting in an error of 3.28% and torque ripples of 105.3% and 133.2%. In the event of a fault, the PMSM can continue to operate with a lower output torque, approximately 60% to 80% of its rated torque, when the single-phase windings are out of service.
Clément Stève Nga Ebode (Sun,) studied this question.