| 摘要 |
The device protects the power factor decrement, wave distortion, and THD increment for AC power supply voltage, and controls the AC power supply for reducing the power consumption. The device includes the input unit(11), the transformer(10) which has the variable and fixed taps, the control unit(12) which controls the transformation ratio, the voltage detecting unit(20) which detects the 2nd terminal voltage, the voltaeg compensation unit(24) which generates the analog control signal, the ladder circuit unit(26) which converts an analog control signal into a digital signal, the control switch unit, the current detecting unit(14), the starting voltage step-up unit(16), and the over load protection unit(18)
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