OFF-LINE INVERTER WITH REGULATED OUTPUT VOLTAGE Russian patent published in 2003 - IPC

FIELD: converter engineering; induction heating of metals. SUBSTANCE: off-line inverter has resonant bridge thyristor inverter and load inserted in filter capacitor circuit; novelty is that input choke is provided with instrument coil inductively coupled with choke series-connected with resonant bridge thyristor inverter with circuit set up of filter capacitor and load being connected in parallel with the latter; instrument coil is connected to rectifier which is connected, in its turn, to input of control unit whose output is connected to gate electrodes of thyristor. Inverter has reduced quantity of components and is immune to instrument-transformer inductance in its operation. EFFECT: enhanced performance characteristics and operating reliability of inverter. 1 cl, 1 dwg