Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A study on the efficiency improvement and miniaturization of a CW $CO_2$ laser using half-bridge resonant Inverter and Cockroft-Walton multiplier

공진형 인버터 및 Cockroft-Walton 회로를 이용한 연속형 $CO_2$ 레이저 효율 향상 및 소형화에 관한 연구

  • Chung, Hyun-Ju (Dept. of Electrical Eng., Pusan National University) ;
  • Min, Byong-Dae (Dept. of Electrical Eng., Pusan National University) ;
  • Kim, Hee-Je (Dept. of Electrical Eng., Pusan National University) ;
  • Kim, Tae-Geun (Dept. of Electrical Eng., Pusan National University)
  • Published : 2003.07.21
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Abstract

We propose a high voltage dc-dc converter for CW(continuous wave) $CO_2$ laser system using a current resonant half-bridge inverter and a Cockcroft-Walton circuit. This high voltage power supply includes a 2-stage voltage multiplier driven by a regulated half-bridge series resonant inverter. The inverter drives a step-up transformer and the transformer secondary is applied to the voltage multiplier. Thus, it has high efficiency because of the less switching losses by virtue of the current resonant half-bridge inverter, and also compact size, small parasitic capacitance in the transformer stage owing to the low number of a winding turn of the step up transformer secondary by combining with Cockroft-Walton circuit. We could be obtained the maximum laser output power of 44 W and the maximum system efficiency of over 16 %.

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