In order to develop an electrical continuously variable transmission (E-CVT) to replace mechanical power coupling equipment applied in series-parallel hybrid electric vehicle (HEV), this paper proposes a magnetic-field modulated brushless dual-mechanical port motor with Halbach array permanent magnets, which has a more compact structure. The operating characteristics are analyzed by the lever analogy. It is concluded that the motor can realize the speed and torque decoupling between the engine and the wheel, which meet multi-mode operation requirements for HEV. To realize the multi-objective design of torque output, torque ripple and usage amount of permanent magnets, an optimization scheme combined parameter sensitivity with response surface methodology is adopted. The trade-offs among the optimization objectives are considered, then the key structural parameters and its optimal values are efficiently determined. Based on a two-dimensional model, the electromagnetic performances are simulated and analyzed. The results show that, after the parameters optimization, the no-load back electromotive force (EMF) has better sinusoidal characteristic, and the torque ripples and cogging torque peaks of the motor have been significantly reduced. Furthermore, a prototype motor is tested. The experimental results are consistent with the simulation results, which demonstrates the validity of the proposed structure and parameter optimization method.

为了开发电动无级变速器（E-CVT）来代替串联-并联混合动力汽车（HEV）中使用的机械动力耦合设备，本文提出了一种采用Halbach永磁阵列的磁场调制无刷双机械端口电机磁铁，具有更紧凑的结构。通过杠杆类比分析操作特性。结论是，电动机可以实现发动机与车轮之间的速度和转矩解耦，满足混合动力汽车的多模式运行要求。为了实现转矩输出，转矩脉动和永磁体使用量的多目标设计，采用了参数灵敏度与响应面法相结合的优化方案。考虑了优化目标之间的权衡，然后有效地确定关键的结构参数及其最佳值。基于二维模型，对电磁性能进行了仿真和分析。结果表明，经过参数优化后，空载反电动势（EMF）具有更好的正弦曲线特性，并且大大降低了电机的转矩脉动和齿槽转矩峰值。此外，还测试了原型电机。实验结果与仿真结果吻合，证明了所提结构和参数优化方法的有效性。空载反电动势（EMF）具有更好的正弦曲线特性，并且大大降低了电机的转矩脉动和齿槽转矩峰值。此外，还测试了原型电机。实验结果与仿真结果吻合，证明了所提结构和参数优化方法的有效性。空载反电动势（EMF）具有更好的正弦曲线特性，并且大大降低了电机的转矩脉动和齿槽转矩峰值。此外，还测试了原型电机。实验结果与仿真结果吻合，证明了所提结构和参数优化方法的有效性。