A comparative study of AVC-PDM and AVC-PWM based cyclo-inverter fed induction heating systems

Wide spread advantages of high frequency techniques finds many applications in various fields. The latest contributions addressees’ uniqueness and efficient requirements in the field of medical equipments, industrial and domestic heating, research areas etc. The primary purpose of this research is to offer extensive output power control in a Cyclo-inverter fed Induction Heating (IH) system by means of two different control techniques such as Asymmetrical Voltage Cancellation with Pulse Density Modulation (AVC-PDM) and Asymmetrical Voltage Cancellation with Pulse Width Modulation (AVC-PWM) technique. Fourier analysis of output voltage is conducted to assess the effectiveness of the suggested technique in addition to conventional one. To improve the dynamic response of resonant based Induction Heating (IH) system for power control, controllers are introduced in the feedback loop. In this work, Cyclo-inverter with Fuzzy Logic controller (FLC) is used so as to improve the transient behavior of the system. Moreover, a comparison of the Cyclo-inverter system is conducted and simulated using MATLAB/SIMULINK. The control logic is implemented on a Spartan 3E FPGA to validate the results.