高速永磁电机转子碳纤维护套张力缠绕仿真分析

Simulation on tension winding of the carbon fiber reinforced plastic rotor sheath for high-speed permanent magnet motor

对于表贴式结构的高速永磁电机,其转子永磁体在高速旋转时产生的较大离心力作用下易于发生破坏。采用张力缠绕技术制备的碳纤维复合材料转子护套可以有效确保电机转子安全稳定运行。通过ANSYS Workbench对一台高速永磁电机表贴式转子碳纤维护套张力缠绕进行了有限元仿真分析。结果表明,通过等效温度场法与生死单元法建立的有限元模型较为准确地模拟出了缠绕过程中受应力松弛效应作用下的护套应力场,从而为后续转子运行工况仿真计算提供了输入条件。此外,在纤维缠绕预应力作用下,护套对转子产生的预紧压力可以确保在转子运行过程中永磁体与转轴始终处于压紧状态,并且护套与永磁体仍处于强度安全范围内,转子保持安全稳定运行。

For the high-speed permanent magnet motor with the surface-mounted structure, the magnet cannot bear the centrifugal force due to the high-speed rotation and is easy to break. Via the tension winding technology, the carbon fiber reinforced plastic(CFRP) rotor sheath can effectively guarantee the safe and steady operation of the rotor. By the ANSYS Workbench software, finite element analysis was conducted on the tension winding of the CFRP rotor sheath for a surface-mounted high-speed permanent magnet motor. The results show that the finite element model can accurately simulate the stress field of the sheath during the winding process. Besides, under the predetermined winding stress on the fiber, the magnet and the shaft can keep the tight contact during the running process of the rotor, with their stress level maintained below the ultimate limit.