新隐极无刷双馈电机的有限元分析

The problem of low efficiency of brushless doubly-fed machine (BDFM) with cage rotor is researched. The efficiency depends on efficiency of rotor magnetic field pole-number conversion. Optimal design of rotor structure is the original approach to improve motor performance. Based on analysis of characteristic BDFM with cage rotor, a new non-salient rotor structure is put forward. In application of ANSYS FEM software non-salient BDFM of different rotor sizes is analyzed and the rotor magnetomotive force harmonic contents are calculated. The result shows that the energy conversion of the new non-salient BDFM is best and the high harmonic contents of rotor magnetic field are lower.