The coil and the control loop of the original AC contactor need not any change, the goal of electricity saving and silent running can be reached.

且不需对原交流接触器线圈和控制回路作任何改变，即可达到节电和无声运行的目的。

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In this regulator system, a DSP controls bi-directional IGBT triggered and turn-off at zero-crossing to control different combination of secondary coil and realize AC voltage stabilization.

通过DSP作为控制器，利用补偿变压器输出可以正负补偿的电压与电网串联，从而实现输出稳定的交流电压。

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