Hybrid excitation synchronous motor (HESM) offers the advantages of a convenient flux regulation and a wide range of available speeds. As such, it may be conveniently employed in the fields of electric vehicle and aerospace. In this paper, based on a suitable control strategy for vector and speed partition, we put forward a speed control method for HESM which shows optimal efficiency. On the one hand, our method aims at minimizing the copper loss by an optimal configuration of the q-axis current, the d-axis current, and the excitation current under the constraint voltage at the armature end. On the other hand, we conduct a comprehensive analysis of the effects of the flux-weakening speed coefficient on the operating performance of the motors and suggest a self-adaptive control method to regulate that coefficient and further improve the overall performance of the motors, including their speed-range regulation, their efficiency, and their dynamical properties. The proposed flux-weakening control method has been assessed by simulations and HESM-driven experiments. Results have confirmed the feasibility and optimality of our method.

中文翻译：

---

混合励磁同步电动机的综合优化控制方法

混合励磁同步电动机（HESM）具有磁通调节方便和可用速度范围广的优点。这样，它可以方便地用于电动车辆和航空航天领域。本文基于矢量和速度划分的合适控制策略，提出了一种具有最优效率的HESM速度控制方法。一方面，我们的方法旨在通过q轴电流d的最佳配置来最小化铜损轴电流和电枢端约束电压下的励磁电流。另一方面，我们对磁通弱化速度系数对电动机的运行性能的影响进行了综合分析，并提出了一种自适应控制方法来调节该系数并进一步改善电动机的整体性能，包括它们的速度范围调节，效率和动力学特性。拟议的弱磁控制方法已通过仿真和HESM驱动的实验进行了评估。结果证实了我们方法的可行性和最佳性。