新能源车驱动用低成本永磁同步电动机研究

发布时间：2019-03-28 16:07

【摘要】：针对现有纯电动大巴驱动用钕铁硼永磁同步电动机存在的高成本、电机高速失控时可能出现过压风险的问题，本文提出采用一种铁氧体永磁的永磁辅助式磁阻同步电动机作为纯电动大巴驱动电机，这种电机具有低成本、高转矩密度、高安全性的优点。本文首先介绍了纯电动大巴及其驱动电机的发展现状，针对现有永磁同步驱动电机的不足，提出利用永磁辅助式磁阻同步电动机作为驱动电机，并对永磁辅助式磁阻同步电动机进行了详细介绍；其次对200kW永磁辅助式磁阻同步电动机进行了电磁设计，着重对四种不同转子结构、三种不同极槽配合以及多种不同定子绕组设计等方面进行对比分析，确定了比较合适的电机结构方案，并对转子结构中V形磁钢张角与隔磁层张角进行了进一步优化；针对纯电动大巴驱动电机工作的复杂工况，建立了驱动电机多领域联合仿真，主要包括对电机不同工况时各部件，尤其是温度敏感的材料进行温度场仿真以及保证转子结构安全的应力场仿真，为转子安全提供参考依据；利用Maxwell软件计算出电机的交、直轴同步电感，利用RMxprt软件自带转子结构建立其本体等效模型，同时建立了Simplorer与Maxwell场路联合仿真平台进行电机电动状态下联合仿真；最后介绍了6kW永磁辅助式磁阻同步电动机小样机的电磁设计与试制过程，针对试制电机转子的安全问题，，提出了改进方案，并对改进后电机进行了仿真分析。
[Abstract]:The invention provides a permanent-magnet auxiliary reluctance synchronous motor with a ferrite permanent magnet as a pure electric bus driving motor, The motor has the advantages of low cost, high torque density and high safety. In this paper, the present situation of the pure electric bus and its driving motor is introduced in this paper. In view of the shortage of the existing permanent-magnet synchronous drive motor, a permanent-magnet auxiliary reluctance synchronous motor is used as the driving motor, and the permanent-magnet auxiliary reluctance synchronous motor is introduced in detail. In this paper, the electromagnetic design of a 200kW permanent-magnet auxiliary reluctance synchronous motor is carried out, and the comparison and analysis of four different rotor structures, three different pole slots and many different stator winding designs are analyzed, and the proper motor structure is determined. in that case of the case, the angle of the V-shaped magnetic steel in the rotor structure and the angle of the magnetic layer are further optimized, and the multi-field joint simulation of the drive motor is established for the complex working condition of the operation of the pure electric bus drive motor, The temperature field simulation of the component, especially the temperature-sensitive material, and the stress field simulation to ensure the safety of the rotor structure are simulated, and the reference basis is provided for the safety of the rotor; the alternating current and the direct-axis synchronous inductance of the motor are calculated by using the Maxwell software, and the body equivalent die is established by using the rotor structure of the RMxprt software In this paper, the combined simulation of Simplano and Maxwell field road joint simulation platform is established, and the electromagnetic design and trial production process of the small prototype of the 6kW permanent-magnet auxiliary reluctance synchronous motor are introduced, and the improvement party is put forward for the safety of the rotor of the trial-production motor. The case is simulated and the improved motor is simulated.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM341

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