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.
现有的异步电动机轻载节能器，大多以电压电流相位差为反馈讯号。
Introduces a new energy-saver for lightly-loaded asynchronous motors, taking current as its sample signal.
还可实现电动机的过流、过载、缺相等多种保护以及轻载节能运行，应用非常广泛。
Its application was widely, which can realize low cost running and protection, such as over current, over load and phase breaking.
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