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author:

Xu, Y. (Xu, Y..) [1] | Guo, Y. (Guo, Y..) [2] | Lin, W. (Lin, W..) [3]

Indexed by:

Scopus PKU CSCD

Abstract:

With low-voltage and high-current, it is often to run the converter in parallel to improve its efficiency and reliability in high-power applications. Since the gain of the LLC resonant converter is very sensitive to component parameters, current sharing problem caused by inconsistency of component parameters between each phase is more prominent when working in parallel. Based on the principle of reducing the sharing current error source, there was a parallel LLC resonant converter with automatic current sharing characteristics presented in this paper. With the resonant capacitors common using and the resonant inductors coupling, there was a better current sharing characteristics can be automatically achieved without any other additional components or control strategies. In this paper, the time domain models of the converter were established and the characteristics of the current sharing error were analyzed when the resonant inductances, resonant capacitors and excitation inductances appeared asymmetry. Compared with the traditional parallel LLC resonant converter, the results of simulation and experiment showed that there were better current sharing characteristics achieved in the proposed parallel LLC resonant converter under the same condition, which was in high agreement with the theory deduction. © 2018 Chin. Soc. for Elec. Eng.

Keyword:

Common capacitance; Coupled inductance; Current sharing error; Parallel LLC resonant converter; Time domain model

Community:

  • [ 1 ] [Xu, Y.]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou, Fujian Province 350108, China
  • [ 2 ] [Guo, Y.]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou, Fujian Province 350108, China
  • [ 3 ] [Lin, W.]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou, Fujian Province 350108, China

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Source :

Proceedings of the Chinese Society of Electrical Engineering

ISSN: 0258-8013

Year: 2018

Issue: 22

Volume: 38

Page: 6671-6682

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 8

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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