仿真结果表明，此功率因数控制系统在空载和轻载时，可节能30%—50%，本论文为异步电动机的节能运行提供了重要的参考作用。
The simulation result demonstrates that it can save up capacity about 30-50% when there is no load or a little load. This thesis can provide important reference function.
在轻载或空载时由于存在大的功率损耗，双极性PWM控制只能被应用于中、小功率伺服控制系统。
As the existing great power consumption of empty-load or light-load, the bipolar PWM control can be applied only in small or middle power servo control systems.
异步电机是一种为数众多的动力设备，当电机运行于轻载或空载时，其效率和功率因素都很低。
Asynchronous motor is a kind of popular power equipment. When the motor is in light or idle run, the efficiency is quite low.
能提高电动机在轻载或空载时的功率因素。
It can improve the power factor of the motor when it is under low load or no load running.
能提高电动机在轻载或空载时的功率因素。
It can improve the power factor of the motor when it is under low load or no load running.
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