一种新型模块化级联电机系统

A New Modular Cascade Machine System

提出了一种新型的模块化级联电机(MCM)系统,将一个电机单元作为一个模块,多个电机模块像电池一样级联式工作,只改变电机数目便可满足不同功率的需求,提高了系统整体效率,增强了容错能力,降低了成本。MCM系统可采用两种匹配方式:单模方式和多模方式。首先,以其在汽车上的应用为背景,研究了两种匹配方式的匹配方法,并提出了设计指标。其次,研究了MCM系统模块电机的设计方法和控制方法,提出最优效率控制策略和容错控制策略。最后,采用有限元法对所设计的样机进行了仿真和效率计算,分别给出了采用最优效率控制策略和转矩补救控制策略的仿真结果。结果表明,新型MCM系统能增加系统高效区范围,提高容错能力,降低研发成本、易于更换。

A new modular cascade machines （MCM） system which comprises unit machines like batteries is presented in this paper. Different power demands can be met by adjusting the number of machines, which will improve vehicle efficiency, enhance fault tolerance ability and reduce costs. Firstly, two matching methods, single-mode and multi-mode, are studied based on the application on vehicles, and the index of the motors is proposed. Secondly, the design ＆ control of the modular machine are researched, and the optimal efficiency control strategy and fault-tolerant control strategy are put forward. Finally, the mechanical characteristics and efficiency of the motor is tested based on the FEA method, and the optimal efficiency ＆ torque compensation control strategy of the motor is confirmed by computer simulation. The results show that this new MCM system can expand the high efficiency area, enhance fault tolerance capability, and reduce the R＆D cost, as well as the maintenance cost.