给电机加一组辅助线圈，只在启动时工作，正常后它就断开。

Give motor electricity a circle assistant loop, and it works only when the motor starts and it will break up after the current goes regularly.

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初级侧感测方法可藉由辅助线圈來达到输出电压或电流的控制。

PSS technique can be used for the output voltage or current regulation by employing an auxiliary winding.

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将PTC热敏电阻串联在启动辅助线圈， 启动后PTC热敏电阻进入高阻态切断辅助线圈，正好可以达到这种效果。

This effect can be reached by connecting the PTC Thermistor in series in starting assistant loop and cutting off the assistant loop when PTCR enters the state of high resistance.

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