Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The development on Power supply for Pulsed $CO_2$ laser using half-rectified AC frequency control and leakage transformer

누설 변압기를 이용한 반파 AC 주파수 제어형 $CO_2$ 레이저의 전원장치 개발

  • Chung, Hyun-Ju (Dept. of Electrical Eng., Pusan national Univ) ;
  • Kim, Do-Wan (Dept. of Electrical Eng., Pusan national Univ) ;
  • Lee, Dong-Hoon (Dept. of Electrical Eng., Pusan national Univ) ;
  • Lee, Yu-Su (Dept. of Electrical Eng., Pusan national Univ) ;
  • Kim, Hee-Je (Dept. of Electrical Eng., Pusan national Univ) ;
  • Cho, Jung-Soo (Dept. of Electrical Eng., Pusan national Univ)
  • Published : 2000.05.13
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Abstract

We introduce pulsed $CO_2$ laser power supply excited by half-wave rectified 60Hz AC discharge some advantage of cost and size compared to a typical pulsed power supply. AC frequency is adjusted from 10Hz to 60Hz to control laser output. In this laser, a low voltage open loop control for high voltage AC discharge circuits is employed to avoid the HV sampling or switching. The control is achieved by using a ZCS circuit and a PIC one-chip microprocessor that control the gate signal of SCR precisely. The pulse repetition rate is limited by 60Hz due to a high leakage inductance. The maximum laser output was obtained about 20W at the condition of total pressure, 18Torr and pulse repetition rate,60Hz.

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