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Uninterruptible duplexed power supply system, and unit plug-in structure for uninterruptible duplexed power supply system

  • US 6,381,156 B1
  • Filed: 01/29/2001
  • Issued: 04/30/2002
  • Est. Priority Date: 09/08/2000
  • Status: Expired due to Fees
First Claim
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1. An uninterruptible duplexed power supply system, comprising:

  • a first unit that uses a first power supply as its input source and that houses a first primary circuit equipped with a switching element on the output side; and

    a second unit that uses the first power supply or a second power supply that is different from the first power supply and that houses a second primary circuit equipped with a switching element on the output side;

    wherein a main component to which the outputs of the first unit and second unit are inputted comprises;

    a primary winding of a high-frequency transformer to which the first unit and the second unit are connected via a connection component;

    a secondary DC output circuit that is connected to a secondary winding of the high-frequency transformer and supplies electrical power to a load;

    a PWM control circuit for keeping the output from this secondary DC output circuit at a constant voltage; and

    a battery-side converter circuit that is connected via a tertiary winding of the high-frequency transformer, is equipped with a switching element on the output side, and is used for charging a rechargeable battery for backup in the event of a power outage;

    wherein the first unit and the second unit are removably installed in a live state between a connected state in which they are electrically connected to the two primary windings of the high-frequency transformer and a disconnected state in which this connected state has been released; and

    wherein the output signals from the PWM control circuit are controlled and inputted to the gate circuits of the various switching elements of the first unit, second unit, and battery-side converter circuit.

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