A Design Study of Dual-Stator Permanent Magnet Brushless DC Motor
Abstract: Dual-stator
permanent magnet brushless DC Motor (DSBLDC) features high efficiency and
torque-density. As DSBLDC could 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 with series magnetic circuit 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 verified the
correction of the method, which also indicates that the motor with superior
performance is adapted to EV drive.
Keywords: dual-stator
permanent magnet brushless DC Motor (DSBLDC), electric vehicle drive, finite element
analysis, magnetic circuit design
Author: Wang Yaling, Xu
Yanliang
Jounal Code: jptkomputergg130096
