Transactions on Electrical and Electronic Materials

  • 제15권1호
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  • Pages.12-15
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  • 2014
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  • 1229-7607(pISSN)
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  • 2092-7592(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Help of Microcontroller on Voltage Control to Reduce Transformer Inrush Current

  • 투고 : 2012.12.03
  • 심사 : 2013.12.14
  • 발행 : 2014.02.25
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초록

At the moment of transformer energization by the supply voltage, a high current called transient inrush current, which may rise to ten times the transformer full load current, could be drawn by the primary winding. This paper discusses a microcontroller circuit with the intention of controlling and limiting the inrush current for a transformer, by the method of ramping up the supply voltage feeding to the transformer primary. Simulations and the experimental results show a significant reduction of inrush current, when the ramping up voltage is applied to the three-phase transformer load. The inrush current could be almost eliminated if the correct switching step rate is chosen.

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참고문헌

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