A soft switching class D current source inverter for induction heating with non-ferromagnetic load

Author

Jittakort, J. ; Sangswang, Anawach ; Naetiladdanon, S. ; Koompai, C. ; Chudjuarjeen, S.

Author_Institution

Dept. of Electr. Eng., King Mongkut´s Univ. of Technol. Thonburi, Bangkok, Thailand

fYear

2011

fDate

Aug. 30 2011-Sept. 1 2011

Firstpage

1

Lastpage

10

Abstract

A class D current source resonant inverter (CSRI) with interleaved buck converter for induction heating power supplies for non-ferromagnetic load is proposed in this paper. The switching devices of CSRI are connected through the common ground and only a single dc power supply is needed for the gate driver circuitry. The maximum output power transferred to the load for the hardware prototype is 1.26 kW. The resonant inverter operates at a fixed frequency of 108 kHz while the interleaved buck converter operates at 40 kHz for soft-switching operation. The output power is controlled by adjusting the pulse width of the interleaved buck converter. The hardware prototype is capable for melting a 30-gram aluminum workpiece at 700 degree Celsius within 25 minutes.

Keywords

constant current sources; induction heating; power convertors; resonant invertors; zero current switching; zero voltage switching; frequency 108 kHz; frequency 40 kHz; gate driver circuitry; induction heating power supply; interleaved buck converter; nonferromagnetic load; output power control; power 1.6 kW; single DC power supply; soft switching class D CSRI; soft switching class D current source resonant inverter; switching device; temperature 700 degC; time 25 min; Electromagnetic heating; Inductors; Logic gates; Power generation; Resonant frequency; Resonant inverters; Current Source Inverter (CSI); Induction heating; Interleaved buck converters; Soft switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on

Conference_Location

Birmingham

Print_ISBN

978-1-61284-167-0

Electronic_ISBN

978-90-75815-15-3

Type

conf

Filename

6020353