The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Minimization of a CW CO2 Laser Output Ripple by using High Frequency Resonance Phenomena

고주파 공진현상을 이용한 CW CO2 레이저의 출력리플 최소화

  • Sikander, Sakura (Dept. of Electronics and Electric Engineering, Pusan National University) ;
  • Kwon, Min-Jae (Dept. of Electronics and Electric Engineering, Pusan National University) ;
  • Kim, Hee-Je (Dept. of Electronics and Electric Engineering, Pusan National University) ;
  • Lee, Dong-Gil (Fisheries System Engineering Division, National Fisheries Research & Development Institute) ;
  • Xu, Guo-Cheng (Dept. of Electronics and Electric Engineering, Pusan National University)
  • 사쿠라 (부산대학교 대학원 전자전기공학과) ;
  • 권민재 (부산대학교 대학원 전자전기공학과) ;
  • 김희제 (부산대학교 전기공학과) ;
  • 이동길 (국립수산과학원 시스템공학과) ;
  • 허국성 (부산대학교 대학원 전자전기공학과)
  • Received : 2012.05.17
  • Accepted : 2013.03.21
  • Published : 2013.06.01
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Abstract

In a conventional DC power supply used for CO2 laser, the circuit elements such as a rectifier bridge, a current-limiting resistor, a high voltage switch, energy storage capacitors ans a high-voltage isolation transformer using high turn ratio are necessary. Consequently, those supplies are expensive and require a large space. Thus, laser resonator and power supply should be optimally designed. In this paper, we propose a new power supply using high frequency resonance phenomena for CW(Continuous wave) CO2 laser (maximum output of 23W with discharge length of 450mm). It consists of a transformer including leakage inductance, magnetizing inductance and half-bridge converter, a three-stage Cockcroft-Walton and PFC(Power factor correction) circuit. The output ripple voltage can be controlled the minimum of 0.24% under the high frequency switching of 231kHz. Furthermore, the output efficiency was improved to 16.4% and the laser output stability of about 5.6% was obtained in this laser system.

Keywords

References

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