关键词: 分裂绕组, 永磁同步电机, 纯电动物流车, 磁路优化, 最大伏安容量

Abstract: A new type motor with divided-winding used for electric logistics vehicle was designed. Divided-winding was adopted for the stator. All the windings were connected when the motor worked in the low-speed area, and part of the windings were connected when the motor worked in the high-speed area, so as to replace the mechanical two speed gear-box to widen the high-efficiency working area. The power and torque characteristic curve of the motor were calculated according to the required power of the electric logistics vehicle. Then the electromagnetic parameters of the rotor and stator under the rated working condition were determined by the analytical method and the finite element method. The magnetic circuit of the d-q axis and the divide ratio of the stator winding were optimized according to the actual voltage and current restrictions. The measurement of the motor was carried out, and the efficiency map of the motor was drawn.

Key words: divided-winding, permanent magnet synchronous motor, electric logistics vehicle, magnetic circuit optimization, maximum volt-ampere capacity