变频调速电动机最佳启动频率探讨

Discussion on the best start-up frequency of conversion regulating speed motor

详细分析了PWM电压型变频调速电动机,在不同的启动频率下启动时,电动机启动转矩和启动电流的变化规律,以及由于高次谐波引起的趋肤效应使定、转子导体电阻阻值显著增加对电动机启动特性的影响,寻找到既满足电动机启动转矩要求,又满足变频器耐流要求的最佳启动频率范围,具有一定的工程参考价值。

The PWM voltage conversion regulating speed motor was analyzed in the paper. Including the variational rule for start- up torsion and start - up current of motor under different start- up frequencies, and the influence to start - up characters of motors because of remarkable increase of the rotor conductor resistance caused by higher harmonic. This paper was very useful in finding the best start - up frequency range which fulfils the demands of motor start - up torque and bearable current of transducer.