井下潜油电机三相交流电参数测试

采用三相三线制供电方式给Ｙ形接法的井下潜油电机组供电，文章针对这种特殊条件下三相交流电机各相绕组电参数测量，提出一种新型三楔电压互感器设计，使互感器各相输出电压在三相电网电压平衡或不平衡条件下都能真实反映井下电机各相绕组电压。

Three-Phase Electric Parameters Measureing of The Downhole Submersible Motor

There are three cables that provide power for downhole three-phase motor in Y mode in electric submersible pump. In accordance to the measurement of electric parameters of every winding of the threephase motor under this special condition, this article presents a new design of three-phasevoltage tranducer that makes its output voltage reflects voltages of every winding of the downhole motor whenever threephase power net is balanced or not. A single-chip integrated Root Mean Square (RMS) curcuit is appliedto measure voltages and currents of every winding as to calculate the power factor of every phase by the voltage and current differences' Other power factors are obtained by direct calculation. The method presented in this paper is suitable for measurements of AC parameters of all motors that in Y mode connections.