A Design Study of Dual-Stator Permanent Magnet Brushless DC Motor
Wang Yaling, Xu Yanliang Xu Yanliang
Abstract
Dual-stator permanent magnet brushless DC Motor (DSBLDC) features high efficiency and torque-density. AsDSBLDCcould operate in various states according to different winding connection modes, it is fully qualified for electric vehicle (EV) drive. Unfortunately, due to the particular dual-stator structure, this kind of motor is difficult to be designed by available design methods. However, this paper demonstrates that a DSBLDC withseries magneticcircuit structure can be regarded as being consisted of two independent BLDCs, an inner-rotor BLDC and an outer-rotor BLDC. Thus, the DSBLDC can be divided into two single-stator BLDCs. Based on this demonstration, the design method is verified by finite element analysis (FEA), and the basic design steps are given. Furthermore, experimental results of the prototype motor have verifiedthe correction of the method, which also indicates that the motor with superior performance is adaptedto EV drive.
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