Modelling and Simulation of Class D and Class DE Amplifier Systems

For the purpose of generation of pure sinewave AC output from the battery source of DC, inverter circuits like class D, class E, etc., were used. This class type inverters generates the PWM signals in sinusoidal forms from the sinewave input frequency, which is fed to the BJT driver of H bridge that generates pure sinewave AC output as discussed. This paper deals with the modelling and the simulation of class D and class DE for induction heating application. To generate the heat in the induction cooker, class DE circuit is connected parallel to the parallel inverter amplifier. This class DE amplifier system consists of reactive elements and four switches in it, so that the class DE amplifier system generates currents at higher frequencies to meet the load demand. In this paper, to bring out the efficient system for the purpose of induction heating, two types of inverter circuits, class D and class DE amplifiers were taken, modelled, simulated and compared. The open loop system of the class D and class DE amplifier system were simulated and the comparative study has been made to show out the efficient system for the induction heating application.