Mathematical analysis of dual-frequency load current of two-inverter power supply for induction heating systems

摘要

The aim of this research work is to obtain analytical expressions that allow analyzing the dual-frequency current of the induction coil, as well as, the currents of the inverters for the "two inverter power supplies" converter topology. To take into account frequency-dependent parameters of an induction heater load, their implementation is shown through series-parallel connections of frequency-independent resistances and inductances. A simulation study is performed to verify the obtained analytical expressions of the currents.