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2015•Journal of Hebei University of TechnologyRequires access

The analysis and design of full-bridge LLC resonant converter

Zhao Yan

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Abstract

As one of the important features of LLC resonant converter, the soft switching technology can not only improve the efficiency and power density of the converter but also greatly reduce the converter switching loss. However, the FullBridge LLC converter has no numerical analysis on soft switch progress and efficient design so far. Based on the equivalent circuit of full-bridge LLC resonant converter, this paper analyzed the resonant network status of switching frequency for the two different resonant frequency, then within the rule of energy conservation for LLC soft switch implementation got the formula derivation, in the last by using the combination of resonant parameter equation and the simulation a LLC converter design method was put forward. A full-bridge of LLC resonant converter prototype was designed to prove by the experimental waveform.

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What this paper is about

As one of the important features of LLC resonant converter, the soft switching technology can not only improve the efficiency and power density of the converter but also greatly reduce the converter switching loss. However, the FullBridge LLC converter has no numerical analysis on soft switch progress and efficient design so far. Based on the equivalent circuit of full-bridge LLC resonant converter, this paper analyzed the resonant network status of switching frequency for the two different resonant frequency, then within the rule of energy conservation for LLC soft switch implementation got the formula derivation, in the last by using the combination of resonant parameter equation and the simulation a LLC converter design method was put forward. A full-bridge of LLC resonant converter prototype was designed to prove by the experimental waveform.

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Available abstract

As one of the important features of LLC resonant converter, the soft switching technology can not only improve the efficiency and power density of the converter but also greatly reduce the converter switching loss. However, the FullBridge LLC converter has no numerical analysis on soft switch progress and efficient design so far. Based on the equivalent circuit of full-bridge LLC resonant converter, this paper analyzed the resonant network status of switching frequency for the two different resonant frequency, then within the rule of energy conservation for LLC soft switch implementation got the formula derivation, in the last by using the combination of resonant parameter equation and the simulation a LLC converter design method was put forward. A full-bridge of LLC resonant converter prototype was designed to prove by the experimental waveform.

Key concepts: Resonant converter, Waveform, Engineering, Half bridge, RLC circuit, Bridge (graph theory), Power (physics), Electronic engineering

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