| 摘要 |
PURPOSE:To provide a power supply in which switching can be made at high rate between control functions for operating a power converter as an uninterruptible power supply or as an active filter according to the state of AC commercial power supply. CONSTITUTION:The current control system functioning as an active filter in the control circuit for power supply comprises a pattern operating circuit 60, a charging current operating circuit 70, a current control circuit 20, an amplitude ratio operating circuit 80, multiplier circuits 91, 92, and adder circuits 98, 99. The voltage control system functioning as an uninterruptible power supply comprises an average value detection circuit 30, a voltage control circuit 10, an amplitude ratio operating circuit 85, multiplier circuits 90, 101, and adder circuits 97, 100. The control circuit further comprises a reference waveform circuit 40, a power recovery detection circuit 50, changeover switches 93, 94, 95, 102 and switches 103, 104, 105, 106. |
