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Digitally controlled boost PFC converters operating with large scale load fluctuations

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Abstract

When boost power factor correction (PFC) circuit works with large scale load fluctuations, it is easy to cause a higher total harmonic distortion and a lower power factor because of traditional controllers and inductor current mode. To solve this problem, this paper proposes a PFC control system, which can operate with load fluctuations up to 1 000 W by using duty cycle feed-forward control theory to achieve smooth switching mode. The duty cycles in the next period of the control system are pre-estimated in the current cycle, which enhances the speeds of AD samplers and switching frequency, and reduces the cost and volume of the equipment to some extent. Introductions of system decoupling and feed-forward of input-voltage greatly improve the system performance. Both theoretical simulation and experimental results prove the advantage of the proposed scheme.

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Authors and Affiliations

  1. School of Electrical Engineering and Automation, Tianjin University, Tianjin, 300072, China

    Yanli Liu  (刘艳莉), Qinglong Wang  (王清龙), Yucui Wang  (王宇翠), Ye Zhang  (张 烨) & Lewei Zhu  (朱乐为)

Authors
  1. Yanli Liu  (刘艳莉)
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  2. Qinglong Wang  (王清龙)
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  3. Yucui Wang  (王宇翠)
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  4. Ye Zhang  (张 烨)
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  5. Lewei Zhu  (朱乐为)
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Corresponding author

Correspondence to Yanli Liu  (刘艳莉).

Additional information

Supported by the National Basic Research Program of China(“973” Program, No. 2009CB219700).

Liu Yanli, born in 1959, female, research fellow.

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Liu, Y., Wang, Q., Wang, Y. et al. Digitally controlled boost PFC converters operating with large scale load fluctuations. Trans. Tianjin Univ. 20, 292–298 (2014). https://doi.org/10.1007/s12209-014-2194-x

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  • DOI: https://doi.org/10.1007/s12209-014-2194-x

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