Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Light Flicker of Three-Phase AC-powered LED Lamp

3상 교류전원 LED 램프의 광 플리커

  • Lee, Dong Won (ACL Co., Ltd.) ;
  • Kim, Byungcheul (Department of Electronic Engineering, Gyeongnam National University of Science and Technology (GnTECH))
  • Received : 2014.02.18
  • Accepted : 2014.03.22
  • Published : 2014.04.01
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Abstract

This study describes that light flicker of LED lamp is improved by placing an AC-powered LED block in each phase of three-phase AC power. Rectified current is considered as an instantaneous luminous flux because the current flowing through the LED block is proportional to the amount of light emitted by the LED block. Percent flicker is calculated simply by modeling the rectified current flowing through the LED block to a triangular wave current. Percent flicker is 100% in single-phase AC powered LED lamp. Percent flicker of the same level as that in an incandescent lamp (6%~14%) is however, achieved if light emission starts before $40^{\circ}$ in each voltage phase of three-phase AC power.

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References

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