Resonant converter

By introducing a adjustable inductor into the resonant converter, the current imbalance caused by the transformer excitation inductance deviation is solved, and the goal of current balance and high power or high integration is achieved.

CN119631291APending Publication Date: 2025-03-14GS YUASA INT LTD
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Patent Information

Application Number
CN202380051545.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-05-12
Filing Date
2023-05-11
Publication Date
2025-03-14

AI Technical Summary

Technical Problem

In the resonant converter, there is a deviation in the excitation inductance of the transformer, which causes current imbalance between multiple conversion circuits, affecting the implementation of high power and high integration.

Method used

By introducing a adjustment inductor into the resonant converter, it is connected in parallel with the primary winding of the downconversion circuit and the upconversion circuit respectively, the circulating current is uniformly adjusted to ensure current balance.

Benefits of technology

The current balance is achieved when the conversion circuit is expanded in parallel, and high power or high integration is easily achieved, while reducing the inductance deviation of the adjustment inductor.

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Abstract

An LLC resonant converter is provided with m down-conversion circuits (101-m) that constitute, together with a resonant inductor (Lr), an LLC resonant converter that operates by the switching operation of an upper switching element (QH) and a lower switching element (QL). An LLC resonant converter is provided with n up-conversion circuits (10m + 1-m + n) in which a primary winding (T1) and a resonant capacitor (Cr) together with a resonant inductor (Lr) constitute an LLC resonant converter that operates by the switching operation of an upper switching element (QH) and a lower switching element (QL). The present invention is provided with: a lower adjustment inductor (Lpd) connected in parallel to primary windings (T1) of m lower conversion circuits (101-m); and an upper adjustment inductor (Lpu) connected in parallel to the primary windings (T1) of the n lower conversion circuits (101-m).
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Citation Information

Patent Citations

  • Fluid generator

    JP1986061982A