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High frequency power supply microwave oven

  • US 4,142,082 A
  • Filed: 06/27/1977
  • Issued: 02/27/1979
  • Est. Priority Date: 12/18/1975
  • Status: Expired due to Term
First Claim
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1. In combination:

  • a microwave oven supplied with microwave energy from a magnetron;

    a power supply for said magnetron comprising a transformer having a primary winding supplied with pulses of current from a source at a substantially constant superaudible repetition rate;

    a nonsaturating transformer having a magnetic core continuously flux biased in one direction with means for controlling the intensity of said current pulses comprising means for varying the average flux density in said core, said pulses of current being supplied to said primary winding when said magnetron is non-conductive to store energy in said core and cessation of each of said pulses producing a voltage in a secondary winding for supplying current to said magnetron.

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