STAND-ALONE HARMONICA INVERTER WITH QUAZI-RESONANCE SWITCHING Russian patent published in 2012 - IPC H02M7/523 H02M7/521 H05B6/02 H05B6/04 H05B6/12 

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering and may be used for induction heaters and other high frequency electric technology loads. The stand-alone harmonica inverter with quazi-resonance switching includes a single-phase bridge on controllable gates with parallel opposed diodes 7-10 connected to inverter's input pins 3-6 through the filter 1,2 throttles. The single-phase bridge is shunted by the filter 11 capacitor, and a.c. output pins of this bridge is coupled with output pin of inverter through the switching throttle 12. The output pins of inverter are shunted with compensating capacitor 13 and connected to the load 14, while the second a.c. output pins of single-phase bridge is connected with the second output pin of inverter through the second switching throttle 15. The switching throttles are implemented as magnet-related and connected harmoniously. He controlled gates are shunted by switching capacitors 16-19, while the a.c. output pins of single phase bridge pins are shunted with snubber capacitor 20.

EFFECT: improved reliability of stand-alone harmonica inverter with quazi-resonance switching operation.

2 dwg