Selection of Power Semiconductor Switches in Modified Half Bridge Resonant Inverter Fitted Induction Heater in Power Line for Less Harmonic Injection

Abstract

<p>This paper presents an approach to minimize the harmonics contained in the input current of single phase Modified Half Bridge Resonant inverter fitted induction heating equipment. A switch like IGBT, GTO, and MOSFET are used for this purpose. It analyzes the harmonics or noise content in the sinusoidal input current of this inverter. Fourier Transform has been used to distinguish between the fundamental and the harmonics, as it is a better investigative tool for an unknown signal in the frequency domain. An exhaustive method for the selection of different power semiconductor switches for Modified Half Bridge Resonant inverter fed induction heater is presented. Heating coil of the induction heater is made of litz wire which reduces the skin effect and proximity effect at high operating frequency. With the calculated optimum values of input current of the system at a particular operating frequency, Modified Half Bridge Resonant inverter topology has been simulated using P-SIM software. To obtain the Input current waveforms through it, further analysis has been employed. From this analysis selection of suitable power semiconductor switches like IGBT, GTO and MOSFET are made. Waveforms have been shown to justify the feasibility for real implementation of single phase Modified Half Bridge Resonant inverter fed induction heater in industrial application.</p>

A Single Switch Parallel Quasi Resonant Converter Topology for Induction Heating Application

“…Methodology used in this kind of application is the important factor in making the operation successful [3], [4] i.e., modulation technique used to trigger the switches in the circuit and duty ratio to be followed to have a better performance in the operation of the application [5], [6]. The performance of the system is compared with various switches like lower band gap switches and wide band gap switches followed in [7]- [9]. The arrangement of the working coil can be series, parallel, series parallel mostly the series arrangement is used for industrial purpose like melting, hardening, soldering, welding etc.…”

Fault Diagnosis in Static Converters Used in Induction Heating Systems

“…For applications requiring higher frequencies (up to 3 MHz), vacuum tubes are used. However, for very high power furnaces operating at 50 Hz, the resonant load is directly connected to the transformer, [4]- [7].…”

A closed-loop power controller model of series-resonant-inverter-fitted induction heating system

“…Moreover, innovative practical approaches should be developed for improving the quality of the input power supply of the induction heating equipment. High-frequency switching distorts the grid voltage, resulting in poor power quality [6].…”