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Switching current spike limiter for three phase coupled inductor conductive battery charger

  • US 5,666,042 A
  • Filed: 08/21/1995
  • Issued: 09/09/1997
  • Est. Priority Date: 08/21/1995
  • Status: Expired due to Fees
First Claim
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1. An input current limited polyphase boost inductor battery charger comprising:

  • an AC power source;

    a diode bridge coupled across the AC power source to define a rectified power source, such rectified power source being coupled to a boost inductor circuit through a current limiting switch, said boost inductor circuit including an inductor having a plurality of windings, a plurality of bridge switches coupled to respective windings of the inductor, a plurality of bridge diodes coupling respective windings to a battery to be charged, and a bridge controller for turning the bridge switches on and off to charge the battery with current delivered to said battery through said bridge diodes; and

    a current limit controller for monitoring the voltages of said AC power source and said battery and for turning the current limiting switch off to interrupt the coupling between the AC power source and the boost inductor circuit when the voltage of said AC power source is greater than the voltage of said battery.

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