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The AC Chopper LED Driving System Using The Y Type Balancing Transformer

Y형 밸런싱 트랜스포머를 적용한 AC초퍼 LED 구동 시스템

  • Received : 2014.10.28
  • Accepted : 2015.01.21
  • Published : 2015.03.31

Abstract

The AC-LED driving system which is connected directly to alternative current source is suitable for commercialization because of it's simple structure and low cost. However, it requires additional circuits compensating for current differences between the parallel connected LED strings. In this paper, we proposed the circuit compensating for current error of the three LED strings using the Y type balancing transformer. The proposed Half-bridge AC Chopper LED driving system used the ferrite material's balancing transformer. at the same time, it is able to dimming control. The proposed system is applied to 80W AC-LED module consist of three parallel strings. Experiment results present that Power factor and THD measured with power analyzer are 0.958 and 26.473% respectively satisfied with IEC61000-3-2 harmonics standard.

Keywords

AC-LED Driving System;Y Type Balancing Transformer;AC Chopper Circuit

References

  1. In-Ung Jeon, Jin-Wan Yoo, Dong-Seok Shin, Chong-Yeon Park, "Simulation of Bridgeless PFC to operate the transformers for LED current balance", Spring Conference of the Korean Institute of Illumination and Electrical Installation Engineers, pp 155-156, 2013.
  2. Jin-Sik Youn, Kyoung-Onn Kim, Jin-Hong Kim, Gi-Hoon Kim, Young-Cheol Lim, "Design of LED Luminaire for Stage Lighting and Estimation of Lighting Situation", Fall Conference of the Korean Institute of Illumination and Electrical Installation Engineers, pp 201-203, 2009.
  3. K. Y. Lee, "Luminout Device", Korea Patent, 10-2005-0010840 (2005).
  4. S, Y, Kim, "LED Driving Circuit for LED Lighting", Korea Patent, 10-2010-0037185 (2010).
  5. H. M. Jung, H. K. Kang, "Driving Device for Light Emitting Diode", Korea Patent, 10-2012-0146675 (2012).
  6. D. H. Hong, M. S. Park, "Light Emitting Diode Lighting Apparatus", Korea Patent, 10-2012-0107424 (2012).
  7. K. H. Jung, J. W. Yoo and C. Y. Park, "A Design of Current Balancing Circuit for Parallel Connected LED strings using Balancing Transformers", IEEE 8th International Conference on Power Electronics, pp. 528-535, Mar. 2011.
  8. J. Y. Park, J. W. Yoo, "Y type balancing transformer for compensating current difference", Korea Patent, 10-2014-0048117 (2014).
  9. S. Ashoka Krishna Bhat and J. Vithayathil, "A Simple Multiple Pulsewidth Modulated AC Chopper", IEEE Trans. on Industrial Electronics, Vol. IE-29, NO. 3, pp. 185-189, Aug. 1982. https://doi.org/10.1109/TIE.1982.356661
  10. B. W. WILLIAMS "Asymmetrically Modulated AC Chopper", IEEE Trans. on Industrial Electronics, Vol. IE-29, NO. 3, pp. 181-185, Aug. 1982. https://doi.org/10.1109/TIE.1982.356660
  11. B. H. Kwon, B. D. Min, J. H. Kim, "Novel topologies of AC choppers", IEE proc.-Electr. Power Appl., Vol. 143, No. 4, July. 1996.
  12. IEC61000-3-2 International Standard Edition 2.1 (2001-10), Electromagnetic compatibility (EMC) - Part 3-2 : Limits for harmonic current emissions (equipment input current ${\leq}$ 16A per phase).