The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Pulsed $CO_2$ Laser by the Switching Control of Leakage Transformer Primary

누설변압기 1차측의 스위칭 제어에 의한 펄스형 $CO_2$레이저에 관한 연구

  • Chung, Hyeon-Ju (Dept.of Electric Engineering, University of Ulsan) ;
  • Lee, Dong-Hoon (Dept.of Electric Engineering, University of Ulsan) ;
  • Kim, Hee-Je (Dept.of Electric Engineering, Busan National University)
  • Published : 2000.09.01
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Abstract

We propose a pulsed $CO_2$laser below 30W by the AC(60Hz) switching control of leakage transformer primary which has some advantages of cost and size compared to a typical pulsed power supply. Pulse repetition rate is adjusted from 5 Hz to 60 to Hz control laser output. In this laser a low voltage open loop control for high voltage pulse discharge circuit is employed to aviod the Hv sampling or switching and high voltage leakage transformer is used to convert low voltage pulse rectified from AC to high voltage one. A ZCS(Zero Crossing Switch) circuit and a PIC(programble one-chip microprocessor are used to control gate signal of SCR precisely. The pulse repetition rate is limited by 60Hz due to the frequency of AC line and a high leadkage inductance. The maximum laser output was about 23 W at pulse repetition rate of 60Hz total gas mixture of $CO_2$ : $N_2$ : He=1: 9: 15 and total pressure of 18 Torr

Keywords

References

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