这是个很大的挑战，因为变速解决方案需要更简单慎密的驱动和节制电路。
This is a very big challenge, because gearshift solution needs the drive of more complex nicety and control circuit.
该节制器采用数字检测电路来获取电网电压与电流的相位差，年夜无功抵偿的事理出发，设计节制器的软硬件。
It measures excess phase of voltage and current by using digital circuit, Based on the reactive compensation theorem, the software and hardware of the controller is deigned.
如晶体管电路，可在输入端参加一个节制旌旗灯号来节制移相巨细；
Such as the transistor circuit can be input by adding a control signal to control the phase-shift size;
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