A 3.6kW single-ended resonant inverter for induction heating applications

The single-ended (SE) resonant inverter is a type of class E parallel resonant inverter and popularly used in many IH applications due to its lower cost structure and relatively high efficiency. However its maximum power rating should be limited because the resonant voltage of SE resonant inverter increases as its power increases. Consequently the maximum power rating of SE resonant inverter should be limited up to around 2kW. This paper proposes an interleaved single-ended resonant inverter for the induction heating applications. The proposed inverter can provide two times higher output power than the conventional single-ended resonant inverter by the alternative operation of two inverters. A burst mode control enhances the power control range from very light load to full load and can improve efficiency.