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Permanent magnet (PM) motor can offer high fault tolerant by introducing fractional slot concentrated winding. However, this winding configuration produces high back-EMF under flux weakening capacity because of low reluctance torque. Then, other protection techniques will likely be required to prevent dangerous overvoltage conditions if the inverter shuts down unexpectedly at high speeds. Additionally,...
By incorporating the design concept of multiple excitations and stator-partitioned structure into the FSPM motor, a new hybrid excited stator-partitioned flux switching permanent magnet motor (HESP-FSPM) is proposed in this paper. On the one hand, by using hybrid permanent magnet (PM), the volume of rare-earth PMs in the proposed machine is reduced effectively with relatively high torque capability...
This paper proposes a new type of motor with hybrid permanent magnet material (HPMM); termed HPMM motor. The key of the proposed HPMM motor is the excitations, which combined rare-earth PM (REPM) with ferrite PM (FPM). To investigate the HPMM motor extensively, the HPMM motors with parallel magnetic circuit (PMC) and serial magnetic circuit (SMC) are designed. Because of the property difference between...
This paper presents a detailed comparison of five topologies for rotor permanent magnet (RPM) motors with improved fault-tolerance. The five topologies include one surface-mounted topology, one surface-insert topology and three interior topologies (spoke-type, conventional and V shape). In these motors, the fault-tolerant teeth (FTT) and the concentrated winding are adopted to offer the merit of phase...
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