关键词: 超高转差电机, 游梁抽油机, 最佳曲柄转差率

Abstract: Ultrahigh-slip motor has good start-up and soft characteristics,suitable for driving beam pumping units which are started up under loading cond ition and show a cyclical variation of polished rod load.It may reduce the capacity of motor and electrical installation get smoother operation and reduce the peak of net torque.But there is a problem of how to make a proper selection of the motor parameters according to the oil well working parameters.The principle and method of selecting the optimum rotary rate of motor are presented and the influencing factors are discussed.In order to save electrical energy and increase production,the optimum rate of revolution is calculated and accordingly the type of motor and torgue can be determined.