非正弦供电条件下电机功率和功率因数测试方法研究

RESEARCH ON TESTING METHOD OF POWER AND POWERFACTOR OF MOTOR UNDER NONSINE CONDITION

随着电力半导体变流装置的广泛使用，交流电机供电系统呈非线性，导致电机的电压和电流波形畸变。利用传统正弦供电条件下的测试方法对功率和功率因数测试，会产生较大误差。所以，必须改进传统的测试方法，以获得非正弦供电条件下电机参数的可靠数据。本文从电压和电流两种基本量入手，提出非正弦供电条件下交流电机功率、功率因数等的测试方法，并给出有关电路。

With the wide use of converter, the power supply of AC motor becomes nonlinear. And this results in distortion of the wave of voltage and current.There would be a big error when testing the power and power factor using a traditional sine model.There fore the testing method must be discussed in order to get a real parameter of the motor.based on the voltage and current, a new method is presented to test power and power factor under nonsine condition, and the circuits are also given in detail.