Browse > Article
http://dx.doi.org/10.6113/TKPE.2016.21.4.351

Development of Converter for High Frequency Welding Machines using Active Snubber  

Shin, Jun-Young (Hyundai Welding Corporation)
Lee, Jae-Min (Hyundai Welding Corporation)
Choi, Seung-Won (Dept. of Electrical Engineering, Myongji University)
Lee, Jun-Young (Dept. of Electrical Engineering, Myongji University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.21, no.4, 2016 , pp. 351-355 More about this Journal
Abstract
Welding machines are high-capacity systems used in a low-frequency range using IGBT. As their system is similar to a large transformer, most welding machines suffer a great loss because of hard switching and vast leakage inductance. A voltage-balancing circuit is designed to overcome these shortcomings. This circuit can reduce the transformer size by making it into a high frequency and reducing the input voltage by half and by adopting a serial structure that connects two full-bridges in a series to use a MOSFET with a good property at high frequency. In addition, a Schottky diode is used in the primary rectifier to overcome the low efficiency of most welding machines. To use the Schottky diode with a reliably relatively low withstanding voltage, an active snubber is adopted to effectively limit the ringing voltage of the diode cut-off voltage.
Keywords
Active snubber; Cell-balancing circuit; High frequency inverter; Soft swiching pwm; Schottky diode; Series structure full-bridge converter; Zero voltage switching;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 C. J. Lee, Y. C. Kim and J. D. Kim, "Technology on arc welding machine of aluminum by digital control," Journal of Korea Welding and Joining Society, Vol. 31, No. 1, pp. 26-32, Feb. 2013.
2 S. K. Kwon and S. P. Mun, "Development of arc welding machines DC-DC converter using a novel full-bridge soft switching PWM inverter," Journal of Korean Institute of Illuminating and Electrical Installation Engineers, Vol. 22, No. 6, pp. 26-33, Jun. 2008.
3 K. M. Yoo, S. J. Kim, K. D. Kim, S. H. Park, Y. S. Byeon, S. B. Lim, and J. Y. Lee "LLC resonant converter design for uninterruptible power supply battery discharger," The Transactions of the Korean Institute of Power Electronics, Vol. 18, No. 3, pp. 240-246, Jun. 2013   DOI