【摘要】 过高的温度会导致永磁同步电机中永磁体退磁，为了运行安全，一般电动汽车和飞行器中作为驱动部件的永磁同步电机需要保证工作在安全工作温度区。通常磁钢安装在转子上，转子的旋转导致磁钢温度的直接测量难以实现，而基于热阻模型的观测方法计算量非常大，且部分热阻参数难以获得。为了解决这个问题，本文采用测试电机空载反电动势的方法得到电机转子的平均温度。在此基础上，通过对机壳的温度进行全方位的检测，根据电机机壳与转子轴向温度分布的关系，对转子的轴向温度进行估计，解决了转子轴向温度难以测量的问题。该方法在搭建的电机测试平台上进行了实验验证。更多还原

【Abstract】 Excessive temperatures can lead to the demagnetization of permanent magnets in permanent magnet synchronous motors.To ensure operational safety,permanent magnet synchronous motors used as drive components in electric vehicles and aircraft must operate within a safe temperature range.As the magnets are typically mounted on the rotor,their rotation makes direct temperature measurement difficult.Moreover,observation methods based on thermal resistance models are computationally intensive,and some thermal resistance parameters are difficult to obtain.To address this issue,this paper proposes a method to estimate the average rotor temperature by measuring the motor’s no-load back electromotive force.On this basis,the stator temperature is comprehensively monitored,and the axial temperature of the rotor is corrected based on the axial temperature distribution relationship between the stator and rotor. This approach effectively solves the problem of measuring the rotor’s axial temperature. The proposed method has been experimentally validated on a motor testing platform.更多还原