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Uninterruptible power supply with AC sine wave output and energy recycle function

  • US 6,094,363 A
  • Filed: 12/21/1998
  • Issued: 07/25/2000
  • Est. Priority Date: 12/21/1998
  • Status: Expired due to Term
First Claim
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1. An interruptible power supply for providing uninterruptible power when utility power is abnormal, said uninterruptible power supply comprising:

  • a battery set for providing a DC voltage;

    a DC/DC converter comprising;

    a DC/DC voltage conditioner for boosting and converting said DC voltage to a boosted and full-wave rectified shaped DC voltage; and

    a DC/DC controller for generating pulse width modulation (PWM) signals to control said DC/DC voltage conditioner in response to a feedback signal indicative of said boosted and full-wave rectified shaped DC voltage and a full-wave rectified shaped DC reference signal;

    an inverter for converting said full-wave rectified shaped DC voltage to a sine wave AC voltage;

    a microcontroller for generating said full-wave rectified shaped DC reference signal to said DC/DC controller and for controlling said inverter;

    a relay for selectively outputting said utility power and said uninterruptible power; and

    an energy recycle charger for charging said battery set by said utility power and for recycling redundant energy of said uninterruptible power to said battery set, said energy recycle charger being controlled by said feedback signal indicative of said boosted and full-wave rectified shaped DC voltage, said full-wave rectified shaped DC reference signal and said PWM signals.

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