Abstract
This article proposes a novel hybrid-excitation switched-flux linear machine with partitioned-excitations (PE-HESFLM), which places the armature windings and field winding into different primaries. It can be geometrically taken as the combination of a conventional flux-switching linear machine and an additional primary for accommodating the field winding. Therefore, the proposed machine can exhibit increased armature and field slot areas so that the competition for space between these two winding types is effectively mitigated, which in return translates to improved thrust density and flux-adjusting capability. First, the configurations of the proposed PE-HESFLM are introduced, following which different slot/pole combinations are globally optimized based on genetic algorithm (GA). Finally, the electromagnetic performances are comparatively investigated. It is shown that the proposed machine can effectively improve the thrust density and flux-adjusting capability, so that the proposed machine configuration is a particularly good candidate for applications which require wide-speed capability.
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