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Single Phase AC Converters for Induction Heating Application

Neethu Salim, Benny Cherian, Geethu James

Induction heating applications require high frequency currents which are obtained using resonant converters viz., Series and Parallel resonant inverters. The resonance frequency in these converters will be tuned to a high value. A single-switch parallel resonant converter for induction heating is discussed. Pulse width modulation (PWM) is used to control the switches. To study the performance of the topologies, simulations has been carried out in MATLAB 2010 environment. It is compared with the existing inverter topologies; half bridge and full bridge.Vienna rectifier as front end is used instead of conventional diode bridge rectifier to provide continuous sinusoidal input current at the source side with extremely low distortion. So we can improve the power factor near to unity and the total harmonic distortion can be reduced to a value below 5%. This power converter is more suitable and acceptable for cost effective high frequency (HF) consumer induction heating applications