| Title |
Design of Control Circuit of Induction Heating Power Supply for Forging Applications Using Current-Source PWM Rectifier and Inverter |
| Authors |
최승수(Seung-Soo Choi ); 고무석( Moo-Seok Goh ); 김인동 ( In-Dong Kim ) |
| DOI |
https://doi.org/10.5370/KIEE.2019.68.8.972 |
| Keywords |
Induction heating; Current source converter; Current source inverter; Power factor; Control circuit modeling |
| Abstract |
The conventional thyristor current source rectifier/inverter-fed parallel resonant circuit widely used for induction heating of forging applications has low power factor and high THD at the input side. Because of these disadvantage the IGBT PWM current source rectifier and inverter has been recently studied as an induction heating power supply topology. Therefore, this paper proposes the design method of power factor controller, the new detecting method of current and voltage for use in system control, and also the technique to follow the resonance voltage of the tank circuit for inverter switching. The proposed techniques are implemented in a 40kVA induction heating power supply and its performances are verified through experiments. It is expected to be used extensively in induction heating power supply systems for forging with wide power range. |