METHOD FOR SUPPLYING AN INDUCTIVE LOAD WITH SOFT-SWITCHING INVERTERS WHICH ARE CONNECTED IN PARALLEL

摘要

The invention relates to a method and a device for supplying an inductive load in the form of an inductor or an induction furnace with a high frequency-power product, using any number of soft-switching inverters which are connected in parallel and which are supplied by at least one rectifier. A capacitor is connected in parallel, upstream of each inverter and is connected to at least one voltage link. The outputs of the inverters are linked to at least one L1C1L2R-parallel oscillating circuit, which consists of the ohmic-inductive load L2R and a resonant capacitor C1 and the total inductance L1 of the resonance reactors. The inverters are connected synchronously and are controlled with the resonant frequency (f0) of the L1C1L2R-parallel oscillating circuit or slightly above or below the resonance frequency (f0) with the switching frequency (fs).