实现广域高效运行，拓宽转速范围，提高能源利用率是电动汽车电机驱动领域的研究热点。目前广泛应用的内置式永磁（IPM）电机，由于单一永磁体励磁，存在弱磁困难和永磁体退磁问题。本项目突破传统IPM电机的技术束缚，创造性地提出一种交替极分段定子无刷混合励磁电机驱动系统拓扑结构，通过分区绕组、交替极转子、分段定子以及励磁电流与电枢电流协调控制，在保持系统高性能输出的同时，拓宽转速范围和高效运行区域。针对该类电机驱动系统，重点围绕磁场调节机理、全局性能多目标优化设计、励磁电流与电枢电流协调控制等方面开展研究；建立集电机设计、优化、系统控制于一体的综合设计仿真计算平台；构建原型样机与实验验证系统；比较该驱动系统与常规系统的共性与特性，并归纳其在电动汽车运行工况下设计与控制的一般规律。本项目的研究是电气工程学科及能源交通领域的前沿课题，将为该类电机驱动系统在电动汽车领域的应用奠定理论与技术基础。

It is a research hotspot in the field of electric vehicle motor drives to achieve wide area efficient operation, widen the speed range, and improve energy efficiency. For widely used interior permanent magnet (IPM) motors, there are the problems of weak magnetic field and permanent magnet demagnetization, due to the excitation of a single permanent magnet. This project breaks through the technical constraints of traditional IPM motors and creatively proposes a topological structure of a brushless hybrid excitation motor drive system with consequent pole segmented stators. Through partitioned windings, consequent pole rotors, segmented stators and coordinated control of excitation current and armature current, it also broadens the speed range and efficient operation area, while maintaining the high performance output of the system. Focusing on this kind of motor drive system, researches are developed in magnetic field regulation mechanism, global performance multi-objective optimization design and coordinate control of excitation current and armature current etc. The comprehensive design and simulation computing platform is built, in which the design, optimization and system control are integrated. Prototype and experimental verification system are constructed; the commonalities and characteristics of the proposed drive system are compared with the conventional system. Furthermore, the general rules of design and control under the operating conditions of the electric vehicle are summarized. The research of this project is a frontier subject in the field of electrical engineering and energy transportation, and it will lay a theoretical and technological foundation for this kind of motor drive system’s application in the field of electric vehicles.