表贴式高速永磁电机多场耦合转子设计  

Multi-field coupling rotor design for surface-mounted high-speed permanent magnet machine

作　　者：吴震宇[1] 曲荣海[1] 李健[1] 方海洋[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《电机与控制学报》2016年第2期98-103,111,共7页Electric Machines and Control

基　　金：国家科技支撑计划(2012BAA01B03);中国博士后科学基金(2014M562022)

摘　　要：针对高速永磁电机转子设计同时受机械强度和电磁性能限制,参数选取困难的问题,基于机械强度设计、电磁设计以及转子动力学设计理论,采用有限元法,提出一套完整的基于多物理场耦合的高速永磁电机转子优化设计方法。综合考虑材料各向异性、离心力以及温度影响,分析了典型护套转子的机械强度变化规律;结合电磁性能要求,确定了最小护套厚度和永磁体厚度,并对三种护套转子的动力学特性进行分析。仿真结果表明,对于大功率高速永磁电机,比较适合采用表贴式的转子结构,而且碳纤维护套转子较其他转子具有更好的机械和转子动力学特性;通过多场耦合的设计方法得到的转子结构能够同时兼顾机械、电磁以及转子动力学特性的要求。Because the rotor design of the high-speed permanent magnet （PM） machine is limited by the mechanical strength and eleetromagneties, a multi-field coupling optimization design method for the rotor of the surface-mounted high-speed permanent magnet machines was presented based on mechanical strength, electromagnetism and rotor dynamics theories by the finite element method. The variation laws of the mechanical strength of rotors with different sleeves were analyzed considering the influences of the ani- sotropy of materials, the centrifugal force and the temperature. The minimum sleeve thickness and the PM thickness were ascertained considering the electromagnetic demands, and the dynamics of rotors with three kinds of sleeves were compared. The simulation results show that surface-mounted permanent mag- net rotor is more suitable for high power rate high-speed permanent magnet machine, and the dynamics and mechanical characteristics of the rotor with carbon fiber sleeve are better than the other rotors. The rotor structure derived by multi-field coupling method meets the demands of mechanical strength, electromagnetics and rotor dynamics.

关 键 词：高速永磁电机 转子 优化 多场耦合 护套 碳纤维 机械强度 

分 类 号：TM355[电气工程—电机]