Palash Pal - Department of Electrical Engineering, Saroj Mohan Institute of Technology (Degree Engg. Div.),A unit of Techno India Group, Guptipara, Hooghly-712512, India
Pradip Kumar Sadhu - Electrical Engineering Department, Indian School of Mines (under MHRD, Govt. of India),Dhanbad - 826004, India
Nitai Pal - Electrical Engineering Department, Indian School of Mines (under MHRD, Govt. of India),Dhanbad - 826004, India
Sourish Sanyal - Department of Electronics and Communication Engineering, Academy of Technology, Academy of Technology, Hooghly, India

This paper presents an exclusive design of EMI-RFI suppressor for Modified Half Bridge inverter based induction heating equipment. With the growing use of high frequency inverter in induction heating equipment, the problem of injected harmonics to the input side becomes critical. A low pass a filter is incorporated between the inverter and the power supply network for reduction of this harmonics. The design of low pass filter is according to the harmonics standards that determine the level of current harmonics injected into the supply side. To reduce the radiated and conducted interference from electronic equipment to sensible level a low pass filter is employed. The input filter of the switching power supply is matched with the power supply when associated with passive loads. The characteristics and suppression may significantly change when used to power active high frequency electronic circuits. Some methods are suggested by the authors to reduce the interference problem for the application in a power supply system of high frequency Modified Half Bridge inverter fitted induction heating equipment. A simulated analytical comparison of Total Harmonic Distortion has been made between two induction heating equipment’s including and excluding the EMI and RFI suppressor.

EMI, RFI, Suppressor, Modified Half Bridge Inverter, LPF, Induction Heating, THD, FFT, PSIM