变频感应电动机测试系统的研究

描述了变频器－电动机测试系统的数学模型，对基于数字滤波的软件同步采样法进行了改进。在微机、高速采样卡、虚拟仪器软件构成的平台上，实现了对变频器供电的电动机的测试，通过修改软件，可满足不同的测试需要。在测量传输功率较大的变频电动机的功率时，采用了损耗总和法进行计算。所研究的测试系统获得了满意的精度要求。

Measurement System of AC Motor Fed by Inverter

The voltage and current signals for the motor inverter system are periodic wide band non sinusoidal in character.Hence, the conventional AC measurement device cannot function properly.A new synchronous sampling method based on digital filtering is developed. It is based on PC, data acquisition board and virtual instrument software.The loss summation method is used for calculating output power of AC motor.The desired accuracy is achieved.