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

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

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

A Study on the Pulsed $CO_2$ Laser by the Switching Control of Leakage Transformer Primary

  • 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)
  • 발행 : 2000.09.01
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초록

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

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참고문헌

  1. P. Loosen, 'Recent Development of lasers for Materials Precessing', Proc of LAMP '92, Nagaoka, Vol. 1, pp.61-66, 1992
  2. J.K.R. Weber, J.J. Felten and P.C. Nordine, 'laser Hearth Melt Processing of Ceramic Materials,' Rev. Sci. Instrum. 67, pp.522-524, 1996 https://doi.org/10.1063/1.1146631
  3. R. C. Harney, '$CO_2$ lasers for Military Applications,' SPIE Vol. 1042 $CO_2$ lasers and Applications, pp.42-54, 1989
  4. 정현주 외 7인, '고효율 $CO_2$ 레이저 개발연구 : SMPS 방식 펄스형 $CO_2$ laser 의 출력 특성', 대한전기학회, 48C , pp.730-734, 1999
  5. Yu. A. Baloshin and I. V. Pavlishin, repetitively pulsed short-pulse TEA $CO_2$ laser with UV pre-ionization, J. Opt. Technol. 65(1), pp.61-62, 1998
  6. K. R. Rickwood and J. Mclnnes, 'High repetition rate mini TEA $CO_2$ laser using a semiconductor prionizer',Rev. Sci. Instrum. 53(11), pp.1667-1669, 1982 https://doi.org/10.1063/1.1136882
  7. C Baker, 'Design of a compact high PRF TEA $CO_2$ laser and performance under multimode and single mode conditions', J. Phys. E: Sci. Instrum, Vol 14, pp.1167-1170, 1981 https://doi.org/10.1088/0022-3735/14/10/018
  8. N. Menyuk and P. F. Moulton,'Development of a high-repetition-rate mini-TEA $CO_2$ laser', Rev. Sci. Instrum. 51,(2), pp.216-220, 1998 https://doi.org/10.1063/1.1136176
  9. Dong-Hoon Lee, Hyun-Ju Chung, Hee-Je Kim, 'Comparison of dc and ac excitation of a sealed $CO_2$ laser', Rev Sci. Instrum. 71,(68), pp577-578. 2000 https://doi.org/10.1063/1.1150245
  10. 이동훈 외 4인, '상용주파수 교류방전 $CO_2$ 레이저의 동작 특성', 대한전기학회, 48C , pp587-590, 1999
  11. S. Muller, J. Uhlenbusch, 'Influence of turbulence and convection on the output of a high-power $CO_2$ Laser with a fast axial flow'. J. Phys. D: Appl. Phys. 20. pp697-708. 1987 https://doi.org/10.1088/0022-3727/20/6/004
  12. J. J. Lowke, 'Predicted transport coefficients and operating characteristics of $CO_2-N_2$-He laser mixtures'. J.Appl. Phys., Vol.44. No.10. pp.4754-4761. 1973 https://doi.org/10.1063/1.1662017
  13. A Cenian, 'Improvement of self-regeneration of gas mixtures in a convection-cooled 1.2kW $CO_2$ laser'. J.Phys. D: Appl, Phys, 30, pp.1103-1110. 1997 https://doi.org/10.1088/0022-3727/30/7/006
  14. K. Terai, 'Characteristics of RF Excited $CO_2$ lasers', Rev. laser Eng. Vol. 21, No.4, pp.39-48, 1993