电动闸阀直驱永磁电机的设计与温度场分析

Design and Temperature Field Analysis of Direct Drive Permanent Magnet Motor with Electric Gate Valve

针对驱动电动闸阀的电机提出的转速低、转矩密度大、工作时间短的要求,以及工作在高温高压特殊环境中的特点,采用短时工作制直驱永磁电机代替低速性能差、转矩小的感应电机,并对电机的基本结构进行了设计。较高的热负荷会使电机温升问题变得突出,因此建立了永磁电机三维瞬态温度场求解模型,通过计算出的电机定子绕组铜耗、定子铁心损耗、永磁体涡流损耗和表面散热系数,得到电机三维瞬态温度场仿真结果。

According to the requirements of low speed,high torque density and short working time of the motor driving the electric gate valve,and the characteristics of working in the special environment of high temperature and high pressure,The short-time direct drive permanent magnet motor is used to replace the low-speed induction motor with poor performance and low torque,and the basic structure of the motor is designed.Higher thermal load will make the problem of motor temperature rise become prominent,so a three-dimensional transient temperature field model of permanent magnet motor is established.By calculating the stator winding copper loss,stator core loss,permanent magnet eddy current loss and surface heat dissipation coefficient,the three-dimensional transient temperature field simulation results of the motor are obtained.