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In this paper, a novel remedial direct torque control (DTC) scheme is proposed for T type NPC (T- NPC) three-level asymmetric six-phase PMSM drives under open-phase faults. A simplified space vector modulation (SVM) is designed and applied for the DTC controlled asymmetric six-phase drive, in such a way that both good current harmonic performance and small DC link voltage fluctuation are available...
Fault-tolerant permanent-magnet vernier (FTPMV) machine is a new permanent-magnet (PM) brushless machine, incorporating the merits of high torque density and fault-tolerant characteristic. However, the high usage of rare-earth PMs significantly increases the machine cost. In this paper, low cost magnets are employed to reduce the cost of the FTPMV machine. Meanwhile, the influence of PM materials...
This paper investigates the thermal behavior of a five-phase fault tolerant permanent magnet vernier (FTPMV) machine under healthy and faulty operating conditions. The losses of the FTPMV machine in healthy and faulty cases are calculated and analyzed at first. Then, thermal analysis of the FTPMV machine is performed by using finite-element method. The simulation results verify that the FTPMV machine...
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