.三相磁通切换型双凸极永磁电机的电感特性分析.pdfVIP

Inductance Characteristics of 3-Phase Flux-Switching Permanent Magnet Machine with Doubly-Salient Structure Wei Hua, Ming Cheng Department of Electrical Engineering, Southeast University, Nanjing 210096, China Email: mcheng@ Abstract This paper investigates the inductance characteristics of a novel 3-phase (12-stator-tooth/10-rotor-pole) flux- switching permanent magnet (FSPM) machine with doubly-salient structure based on finite element analysis (FEA). Firstly, the topology and operation principle of the FSPM machine are introduced. Secondly, the apparent and incremental inductances are defined. Then, the conventional calculation method of transforming the inductance in stator frame into rotor frame is performed. To overcome the shortcoming of the conventional method, e.g. time-consuming, a new simplified and fast method is proposed to obtain the d-axis and q-axis inductances directly and accurately at two special rotor positions. The proposed method is validated by the comparison of the predicted results by two ways. Key words: Flux-switching, doubly-salient, permanent magnet machine, inductance, finite element analysis 1 Introduction Conventional permanent magnet (PM) brushless machines usually have magnets on the rotor. However, brushless machines having magnets on the stator [1], namely doubly-salient permanent magnet (DSPM) machines [2]-[4], flux-reversal permanent magnet (FRPM) ma