Direct current link circuit

  • US 10,007,288 B2
  • Filed: 03/21/2017
  • Issued: 06/26/2018
  • Est. Priority Date: 03/05/2012
  • Status: Active Grant
First Claim
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1. An electronic circuit comprising:

  • positive and negative input terminals configured to be connected across a floating source of direct current (DC) power;

    positive and negative output terminals;

    first and second field effect transistors each comprising an integral diode, wherein the first and second field effect transistors are connected in series across the positive and negative input terminals, and wherein a connection point between the first and second field effect transistors forms a first node;

    first and second diodes connected in series, wherein a connection point between the first and second diodes forms a second node;

    a first resonant circuit connected in series between the first and second nodes, wherein, when the first field effect transistor is closed and the second field effect transistor is open, the first resonant circuit is connected across the positive and negative input terminals through the first diode, and wherein, when the first field effect transistor is open and the second field effect transistor is closed, the positive and negative output terminals and the first resonant circuit are connected in series across the positive and negative input terminals through the second diode;

    third and fourth field effect transistors each comprising an integral diode, wherein the third and fourth field effect transistors are connected in series across the positive and negative input terminals, and wherein a connection point between the third and fourth field effect transistors forms a third node;

    third and fourth diodes connected in series, wherein a connection point between the third and fourth diodes forms a fourth node; and

    a second resonant circuit connected in series between the third and fourth nodes, wherein, when the third field effect transistor is closed and the fourth field effect transistor is open, the second resonant circuit is connected across the positive and negative input terminals through the third diode, wherein, when the third field effect transistor is open and the fourth field effect transistor is closed, the positive and negative output terminals and the second resonant circuit are connected in series across the positive and negative input terminals through the fourth diode, wherein the first and fourth field effect transistors are configured to be opened and closed together, and wherein the second and third field effect transistors are configured to be opened and closed together.

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