BRIDGE INVERTER Russian patent published in 2003 - IPC

FIELD: power converter engineering; dc-to- ac energy inverters for various industries. SUBSTANCE: bridge inverter that may be used to produce high-frequency power supplies for inductive heating appliances has bridge built around controllable gates and connected to one of its output leads, load circuit being connected across diagonally opposite ac terminals while diagonally opposite dc terminals are shorted out by differentially connected rectifier diode. Damping RC circuit shorts out diagonally opposite dc terminals of bridge connected to other input lead through additional choke whose inductance is higher by at least an order of magnitude than that of switching choke. Interconnected switching choke and capacitor are connected in parallel with backward rectifier diode. EFFECT: reduced voltage across inverter thyristors which raises reliability of device. 1 cl, 2 dwg