A two-output high frequency series-resonant induction heater

This paper presents the development of a two-output high frequency series-resonant induction heater whose concept is to reduce a size and a number of components. This prototype can control two-unit output power by using 3-legs of full-bridge series-resonant inverter; one leg for common control and others for each independently control. The prototype can provide the rated power of 2.154 kW and 2.245 kW for each output, operating frequency of 50.45 kHz with 91.46% of inverter efficiency. That means the power can be adjusted from 0.89 to 2.154 kW and 0.986 to 2.245 kW by the asymmetrical voltage cancellation methodology.