CONVERTER FOR INDUCTION HEATING ON THE BASIS OF A PARALLEL BRIDGE RESONANT INVERTER AND METHOD FOR CONTROL OF A CONVERTER FOR INDUCTION HEATING ON THE BASIS OF PARALLEL AREA BRAND

摘要

1. A converter device for induction heating based on a parallel bridge resonant inverter, comprising a first valve bridge consisting of four controllable valves, in series with each of which a part of an oscillating circuit choke is connected, wherein the first valve bridge has a DC diagonal and an AC diagonal, wherein the first valve bridge with a DC diagonal is connected to a DC voltage source with such a polarity that the controlled valves are connected in the forward direction with respect to the polarity of the DC voltage source, and the first capacitor is connected to the AC diagonal of the first valve bridge, in parallel to which the first inductor is connected , characterized in that a similar second valve bridge, which has a direct current diagonal and an alternating current diagonal, as well as a second capacitor and a second inductor are additionally introduced, with a second vein DC diagonal The power bridge is connected parallel to the DC diagonal of the first valve bridge, and a second capacitor is connected to the AC diagonal of the second valve bridge, parallel to which the second inductor is connected, while the two inductors are combined into one two-winding inductor containing two half-windings, the first and the second, each of which is connected in parallel with one of the capacitors of the two valve bridges, while each half-winding of the two-winding inductor is made of two parts of the first and the second, connected in series with each other, while part of the half-windings on the side