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Ultrasonic frequency power supply

  • US 5,777,860 A
  • Filed: 10/16/1996
  • Issued: 07/07/1998
  • Est. Priority Date: 10/16/1996
  • Status: Expired due to Term
First Claim
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1. An ultrasonic frequency power supply for driving transducer means providing ultrasonic energy to a cleaning liquid, comprising:

  • means for receiving alternating current input and providing substantially unfiltered full wave rectified direct current output, the undulations of the direct current voltage output having substantially the same phase and amplitude as the voltage of said alternating current input;

    inverter means coupled for receiving said direct current output and producing responsive to power control means acting upon said inverter means and series connected impedance matching means an alternating current voltage for driving said transducer means;

    said power control means operating said inverter means responsive to;

    (a) power measuring means and power adjustable means connected to said control means for causing said transducer means to operate at a set average power level;

    (b) phase detection means and frequency control means connected to said control means for causing said transducer means to operate substantially at its resonant frequency; and

    (c) power modulation means connected to said control means for optionally providing to said transducer means peak power pulses of a set amplitude but at constant said set average power level.

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