The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Optimal Design considering Magnetic Saturation Characteristic of Current Transformers for the Overcurrent Warning Circuit

과전류 경고 회로용 변류기의 자기포화 특성을 고려한 최적 설계

  • Received : 2015.06.22
  • Accepted : 2015.07.23
  • Published : 2015.07.31
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Abstract

In this paper, we analyzed characteristic of window type current transformer and we performed the optimal design consider to the loss; in order to design the current transformer figured signal of overcurrent warning circuit. The core size of window type current transformer was determined by the secondary coil turns. We analyzed current waveform, which is appeared by the number of coil turns on the core, we made sure the relation of secondary coil turns and load resistance in order to improve the non-sinusoidal wave by the flux saturation of the current transformer core. Additionally, we did improvement of the accuracy and optimal design through the transformation of the inner diameter and the stack length when the outer diameter of core is sustaining.

본 논문은 과전류 경고회로의 신호를 나타내는 변류기를 설계하기 위해 관통형 변류기의 특성을 분석하고 손실을 고려한 최적 설계를 수행하였다. 관통형 변류기 코어의 크기는 2차측의 코일 턴수에 따라 결정된다. 우리는 코어에 코일을 감는 턴수에 따라 다르게 나타나는 전류 파형을 분석하였으며, 변류기 코어의 자속포화에 의한 비정현적인 파형을 개선하고자 2차측 코일 턴수와 부하저항과의 관계를 확인하였다. 또 코어의 외경은 유지하면서 내경 및 적층을 변화시켜 정밀도 개선 및 최적설계를 하였고, 이를 통하여 과전류 경고회로의 동작에 필요한 전류 값을 도출하였다.

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References

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