Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Output Characteristics of AC Chopper Duty-Ratio $CO_2$ Laser System using 3 Electrode-type and Ring Blower

AC Chopper 3전극 방식의 듀티비에 따른 $CO_2$ 레이저 출력 특성에 관한 연구

  • 박성준 (부산대학교 전기공학과) ;
  • 정현주 (부산대학교 전기공학과) ;
  • 김근용 (부산대학교 전기공학과) ;
  • 이유수 (부산대학교 전기공학과) ;
  • 김휘영 (동주대학 컴퓨터정보통신학과) ;
  • 김희제 (부산대학교 전기공학과)
  • Published : 2001.07.18
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Abstract

In this paper, the circuit of AC Choppers for $CO_2$ laser power supply are proposed and investigated. IGBT-controlled ac voltage regulators, operating at high frequency chopping mode. Chopping-to-supply duty ratio plays an important role in terms of laser output. Laser input energy is varied by controlling the leakage transformer used with the proposed system. This improved circuit employs a 3 electrode - type and Ring Blower. This improved circuit system has many advantages compared with the conventional SMPS such as simple design requirement, easy implementation, high reliability, low switching loss, and consequently high efficiency. As a result, the maximun output was 16W at duty-ratio of 92%, total gas mixture of $CO_2$ : $N_2$ : He = 1 : 9 : 15, total pressure of 15torr.

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