【摘要】 绕组动态热特性会影响电动机的使用、保护以及控制。根据异步电动机定子等效热路,建立了定子绕组的动态热特性,再应用实测的温度数据,采用曲线拟合的方法确定动态热特性的参数。在此基础上,研究了可用于在变动负载下计算绕组温度的动态热特性离散算法,实验结果表明该离散算法可以在各种运行状态下准确计算绕组的最高温度,其计算误差不会随时间累积,而且初始误差会随时间逐渐减小。该文所作的研究可为电动机的高效率应用、高准确性保护以及高精度控制提供参考。更多还原

【Abstract】 The dynamic thermal characteristic of the windings is very important for the application,protection and control of motor.Based on the equivalent thermal circuit of the induction motor stator,the dynamic temperature model of the stator winding was established in this paper.Then the parameters of the dynamic thermal characteristic were determined by the method of curve fitting based on the measured temperature data.The discrete algorithm of windings dynamic thermal characteristic which can be used to calculate the windings temperature under variable load was also studied in this paper.Experimental results show that the discrete algorithm can accurately calculate the maximum temperature of the windings in a variety of operating conditions.The error will not be accumulated with time,and the initial error will be gradually reduced.It lays the foundation for high-efficiency application,high-accuracy protection and high-precision control of the motor.更多还原