交流三相异步电机功率因数的测量

The Testing of Power Factor of Alternating Current Machine

提出了三相平均功率因数的概念 ,设计了三相相电压和相电流相位差的平均值测量电路和电平转换及滤波器 ,并对该电路的输出信号和滤波器的设计作了详细说明 .实践证明 ,此方法可以明显提高交流三相异步电机工业型式试验中功率因数的测量精度 。

The paper presents the concept of three phase average power factor and designs the electric circuit of the phase deference between three phase voltage and three phase electric current,analyzes the output signal of the electric circuit and describes designing manner of the filter. It has been proved that the method features high accuracy, high reliability and practicability in testing of industrial pattern of alternating current machine.