바리스터와 LC필터를 조합한 교류 전원용 서지보호장치

Surge Protective Device Combined with Varistor and LC Filter on AC Power Circuits

  • 이복희 (인하대 공대 전기공학과) ;
  • 이경옥 (인하대 대학원 전기공학과) ;
  • 안창환 (인하대 대학원 전기공학과) ;
  • 이승칠 (인하대 대학원 전기공학과) ;
  • 박정웅 (인하공업전문대학 항공기계과)
  • 발행 : 1997.08.01

초록

I본 논문은 교류 전원용 바리스터와 LC필터를 조합한 서지 보호장치에 대해서 기술하였다. 지금까지 교류 전류용 서지 보호장치로써 바리스터만이 주로 사용되어 왔으나, 이것은 급상승하고 높은 잔류전압 때문에 보호되어야 할 장비에 해로운 결과를 초래하는 경우도 있다. 따라서 본 연구에서는 교류 전원용 서지 보호장치의 차단 성능을 향상시키기 위하여 바리스터와 LC필터로 구성된 조합형 서지 보호장치를 설계.제작하였다. 그리고 서지 보호장치의 동작특성과 차단 성능의 분석에 대한 실험을 1.2/50[$\mu\textrm{s}$] 임펄스 발생기를 적용하여 수행하였다. 결론적으로 본 연구에서 제시한 조합형 서지보호장치는 서지 전압을 더욱 낮게 제한할 수 있고, dV/dt의 값을 매우 낮은 값으로 감소시키며, LC필터에 의한 출력단의 고주파 전압을 효과적으로 감쇠시킬수 있기 때문에 전자시스템의 손상과 전도를 더욱 더 효과적으로 방지할 수 있다.

This paper describes the surge protective device combined with varistor and LC low pass filter on AC power circuits. Up to now varistors alone have been used as a surge protective device on AC power circuits, but it gives negative effects on the equipments to be protected due to the steep rise and high remnant voltage. Therefore in this work, for the purpose of improving the cutoff performance of surge protective device on AC power circuits, the hybrid-type surge protective device with varistor and LC filter was designed and prepared. And the experiments for operational characteristics and clamping performance of the surge protective device were carried out with an 1.2/50[$\mu$s] impulse generator. As a result, the proposed surge protective device with the combination of varistors and LC filter can limit the surge voltage to lower value and reduce the value of dV /dt to very small values. Also the attenuation of high-frequency voltages across the output port is effectively provided by LC filter. Therefore this result may be all the more helpful avoiding both damage and upset of electronic systems.

키워드

참고문헌

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