| Summary: | 碩士 === 國立雲林科技大學 === 電機工程系 === 105 === The main purpose of this thesis is to analyze the characteristic of a novel permanent magnet synchronous motor (PMSM). Firstly, the mathmatical analysis of the PMSM is accomplished by the d-q axis theory. Secondly, the commercial finite element method (FEM) software, Flux, is applied to simulate the cogging torque, back electromotive force, electromagnetic torque, d-q axis inductances and efficiency, observing whether the results meet the design requirements. The expression of the PMSM is evaluated by a circle diagram method, which shows the adjustable speed range and output characteristics by drawing the operating area as track in the plane of d-q axis of current. Finally, the differences of the motor characteristics are compared in the case of various slot/pole combinations of the same motor size.
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