PUSH-PULL DC/DC CONVERTER WITH L-INLET Russian patent published in 2018 - IPC H02M3/338 

FIELD: electricity.

SUBSTANCE: device is a push-pull DC/DC converter with an L-inlet. It comprises: a main throttle; a transformer with primary and secondary windings. The primary winding is made with a centre terminal; the first and second power transistors (power controlled keys); a full-wave current rectifier of the secondary winding; an output filter capacitor. The known features of the push-pull DC/DC-converter with the L-inlet are: connection of the first terminal of the main throttle winding to the first power bus and direct connection of the second terminal of this winding to the centre of the primary transformer winding; connection of the first terminal of the primary winding to the second power bus via the output circuit of the first power transistor; connection of the second terminal of the primary winding to the second power bus via the output circuit of the second power transistor; connection of the secondary transformer winding via the full-wave current rectifier of this winding to the output filter capacitor. The characteristic features of the push-pull DC/DC-converter are: introduction of the first, second, third and fourth diodes, additional throttle, as well as the first and second capacitors to the device; connection of four entered diodes according to the diode bridge circuit; direct connection of the first terminal of the output circuit of the mentioned diode bridge to the first power bus; connection of the second terminal of the output circuit of the diode bridge to the second power bus via the additional throttle winding; connection of the first terminal of the input circuit of the diode bridge via the first capacitor to the connection point of the first terminal of the transformer primary winding with the first power transistor; connection of the second terminal of the input circuit of the diode bridge via the second capacitor to the connection point of the second terminal of the transformer primary winding to the second power transistor.

EFFECT: reducing switching loss energy in power transistors during their lock-out, thus increasing the reliability of their operation and increasing the energy efficiency of energy conversion.

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