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INRUSH-CURRENT LIMITING DEVICE

  • US 3,781,637 A
  • Filed: 01/02/1973
  • Issued: 12/25/1973
  • Est. Priority Date: 01/02/1973
  • Status: Expired due to Term
First Claim
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1. An electrical power supply comprising:

  • a current limiting resistor coupled to a first power supply input terminal;

    a first storage capacitor coupled between said current limiting resistor and a second power supply input terminal;

    a second storage capacitor coupled to said first storage capacitor;

    means for charging said second storage capacitor comprising a first inductive impedance and a first electronic switch coupled in series with said first inductive impedance, said charging means coupled between said current limiting resistor and said second capacitor, said charging means operating in response to a first control signal;

    means for discharging said second storage capacitor comprising a second inductive impedance and, a second electronic switch coupled in series, said discharge means coupled between said second capacitor and a second power supply input terminal, said discharge means operating in response to a second control signal;

    means for controlling said charging means and said discharging means, said control means producing alternately said first control signal and said second control signal;

    means for producing a rectified and filtered output signal, said output means coupled to at least one of said first and said second inductive impedance; and

    a third electronic switch coupled in parallel with said current limiting resistors said third electronic switch coupled to said second storage capacitor, said third electronic switch being conductive during a charging of said second storage capacitor.

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