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Resonant inverter

  • US 4,858,099 A
  • Filed: 12/08/1988
  • Issued: 08/15/1989
  • Est. Priority Date: 12/08/1988
  • Status: Expired due to Term
First Claim
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1. A resonant inverter comprising, in combination:

  • input terminals energizable from a DC supply source and having a filter capacitor;

    an energy storage transformer having a primary winding;

    means to obtain an output from said transformer;

    conducting, resonating, and clamping means connected to said transformer primary winding to established sequentially conducting, resonating, and clamping portions of repetitive cycles of operation, respectively;

    said conducting means including a first semiconductor connected to said primary winding to conduct current therethrough;

    said resonating means connected to resonate the energy in said primary winding including a storage capacitor connected to said primary winding;

    a second semiconductor having a control element;

    means responsive to the current of said first semiconductor to turn on said second semiconductor and to turn off said first semiconductor;

    said resonating means reversing the current in said primary winding and establishing the energy stored in the inductance of the primary winding being released into said storage capacitor; and

    said clamping means including unidirectional conducting means connected to establish a time for excess energy stored in the tank circuit composed of said primary winding and said storage capacitor to return to the input and be stored in said filter capacitor.

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