Efficiency of induction motor at rated operation state is higher and is obviously reduced at light-load operation.
异步电动机运行在额定工作状态效率较高，轻载运行时效率就会明显下降。
2
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.
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。
3
Carrying more than a lightload on your bicycle makes it more difficult to control.