Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (4): 34-39.doi: 10.3969/j.issn.1000-565X.2016.04.006

• Power & Electrical Engineering • Previous Articles     Next Articles

Power Supply Driven by Cuk Constant Current with Active Ｒipple Compensation for LED Headlamp

TANG Zhi-de WANG Ｒui YANG Xi   

  1. College of Electrical Engineering//State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University,Chongqing 400044,China
  • Received:2015-07-21 Revised:2015-12-22 Online:2016-04-25 Published:2016-04-12
  • Contact: 唐治德(1958-) ，男，教授，主要从事大功率LED 照明、X 光机高压电源的研究． E-mail:zhzhaodan@126.com
  • About author:唐治德(1958-) ，男，教授，主要从事大功率LED 照明、X 光机高压电源的研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China( 50877082)

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Abstract: As the lifespan of the output filter's electrolytic capacitor in general lighting LED power supply does not match LED's long lifespan,a LED driving circuit based on Cuk with active ripple compensation is proposed.In this circuit,the active ripple compensation branch is used to replace the output filter's electrolytic capacitor to offset the inductor's ripple current,which provides the LED array with a constant DC and further with ideal driving state.This paper describes the principle and implementation of the active ripple compensation circuit,analyzes the loss and efficiency of LED driving circuit based on the Cuk with active ripple compensation,and designs and fabricates an LED power supply with an output power of 22W based on the Cuk with active ripple compensation and hysteresis current control.Simulated and experimental results indicate that the proposed power supply is feasible.

Key words: driving power, light-emitting diode, ripple compensation, electrolytic capacitor, hysteresis current control