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Constant power switching power supply

  • US 4,442,382 A
  • Filed: 07/06/1982
  • Issued: 04/10/1984
  • Est. Priority Date: 07/06/1982
  • Status: Expired due to Fees
First Claim
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1. Apparatus for delivering DC electrical power at a constant rate to continuously operating load means comprising:

  • a. means for generating a series of spaced, generally sawtooth shaped waves;

    b. means for initiating said waves at a predetermined unvarying frequency;

    c. means in response to the peak current reached by said waves to terminate said pulses at times so as to maintain a preselected peak current; and

    d. means for delivering the electrical energy in said sawtooth waves to said load means during the periods of time between said sawtooth waves, said power being delivered to said load means being thereby maintained at a constant, predetermined level irrespective of variations in line voltage and impedance of said load means.

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