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Modular parallel technique for resonant converter

A technology of resonant converters and resonant capacitors, which are used in high-efficiency power electronic conversion, output power conversion devices, instruments, etc.

Active Publication Date: 2018-05-11
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] Therefore, this known current sharing method cannot provide efficient and flexible current sharing for multi-phase LLC resonant converters

Method used

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  • Modular parallel technique for resonant converter
  • Modular parallel technique for resonant converter
  • Modular parallel technique for resonant converter

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Embodiment Construction

[0045] In the shared inductor current sharing method for the multiphase LLC resonant converter according to the embodiment of the present invention, the series resonant inductors in each phase are connected in parallel. No additional components are required to achieve current sharing. Analysis of the shared inductor current sharing method shows a significant drop in relative resonant current. Simulation and test results show that the resonance current error is reduced by 63 times, and it is only 0.44% when the total load power is 600W. As a comparative example, the shared capacitor current sharing method was also examined. Such as Figure 32 As shown, the shared capacitor current sharing method can only achieve a 5% resonance current error when the total load power is 600w. The LLC resonant converter shown in Figure 30 can only achieve a resonant current error of 27% when the total load power is 600W.

[0046] figure 1 A two-phase LLC resonant converter using a shared ind...

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Abstract

An LLC resonant converter includes a first phase with a first primary circuit and a second phase with a second primary circuit. The first primary circuit includes a first shared inductor, and the second primary circuit includes a second shared inductor. The first and second shared inductors are connected in parallel with each other. The first and second primary circuits do not include a capacitorthat is connected in parallel with each other.

Description

technical field [0001] This invention relates to high efficiency power supplies and the like. Background technique [0002] Multi-phase parallel resonant converters are suitable for high-efficiency and high-power DC / DC applications, such as for communication power supplies and similar applications. Load sharing is an important issue in the above applications. Interleaved parallel power converters can provide output with less ripple. However, since the interleaved parallel power converter needs to add metal oxide semiconductor field effect transistors (MOSFETs), the cost of the interleaved parallel power converter is high, and an additional gate driving circuit is required. When the load changes, the dynamic performance of the interleaved parallel power converter is not good. Especially, at low load, the switching losses of all MOSFETs degrade the efficiency of the interleaved parallel power converter. [0003] The known LLC resonant converter is preferably suitable for i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33576H02M3/3376H02M3/285Y02B70/10H02M1/0058H02M3/33592
Inventor 汪洪亮陈扬刘燕飞J·阿夫什阿里昂杨志华龚冰
Owner MURATA MFG CO LTD
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