Abstract
A high gear ratio flux switching permanent magnet machine (HFSPM) was proposed to improve the torque performance in flux switching permanent magnet machine (FSPM). Conventional FSPMs address flux bypass issue when designed with a high gear ratio. The HFSPM adopts a dual rotor structure to overcome this flux bypass issue. First, the cause and effect of flux bypass issue was discussed using a magnetic equivalent circuit (MEC). Further, the process of overcoming the flux bypass issue using dual rotor structure was discussed. An alternative HFSPM, consequent pole HFSPM (CP-HFSPM), was proposed to enhance torque performance. The CP-HFSPM was optimized for high torque performance and proper power factor.
Highlights
Flux switching permanent magnet machines (FSPMs) were studied for many decades owing to the attraction of its unique structure and working principle [1]–[4]
For a high torque performance, high gear ratio design can be considered in stator PM machines, including the FSPM [3]
In stator PM machines such as the FSPM, the gear ratio is based on the rotor iron pole number and armature pole pair number [7]
Summary
Flux switching permanent magnet machines (FSPMs) were studied for many decades owing to the attraction of its unique structure and working principle [1]–[4]. For a high torque performance, high gear ratio design can be considered in stator PM machines, including the FSPM [3]. In stator PM machines such as the FSPM, the gear ratio is based on the rotor iron pole number and armature pole pair number [7].
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