三相异步电动机的轻载运行，是很不经济的。
The running of electric motor with light load is not economic.
一台机组可满负荷运行而同时另一机组可轻载运行。
It can be operATed AT full load while AT the same time another machine may be lightly loaded.
实验室测试结果表明，该方法在电机轻载运行时起到了很好的节能效果。
Laboratory test results show that better energy-conserving effect is obtained in light-loading.
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。
Efficiency of induction motor at rated operation state is higher and is obviously reduced at light-load operation.
本文主要研究了电动汽车电驱动系统的在线效率优化控制，来提高异步电机在轻载运行时候的效率。
Online efficiency-optimization control (EOC) of IM drives is proposed and studied in this paper to solve the low-efficiency problem.
实验结果表明本文控制方案不仅能使中小功率异步电动机轻载运行时节能，还使其电磁转矩振荡减小。
These results indicate that the proposed control scheme not only saves energy while in light running of medium-low power asynchronous motors but also decreases the surge of the electromagnetic torque.
在工业生产中，尤其在机加工行业，一些电动机在多数情况下处于空、轻载运行，造成了能源的不必要浪费。
In industry production, some electric motors work in empty loading or light loading so that much power is wasted.
在工业生产中，尤其在机加工行业，一些电动机在多数情况下处于空、轻载运行，造成了能源的不必要浪费。
In industry production, some electric motors work in empty loading or light loading so that much power is wasted.
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