Modular dc-dc converter

EP4631161A1Pending Publication Date: 2025-10-15INNOMOTICS GMBH
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Patent Information

Application Number
EP2023768173
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-12-05
Filing Date
2023-08-30
Publication Date
2025-10-15

AI Technical Summary

Technical Problem

Existing modular DC-DC converters face challenges in efficiently connecting and regulating DC networks with different operating voltages, particularly in ensuring bidirectional power exchange and suppressing alternating currents and voltages across DC voltage connections.

Method used

A modular DC-DC converter design featuring two module arms with series-connected submodules, inductors, and a mesh capacitor, where the inductors and capacitors are strategically placed to generate and superimpose DC and AC voltage components of the same frequency, enabling energy transfer and voltage regulation across DC voltage sides while preventing alternating currents and voltages.

Benefits of technology

This design allows for efficient bidirectional power exchange between DC networks with different voltages, effective suppression of alternating components, and cost-effective structure, enabling seamless integration of components with varying operating voltages and energy storage devices.

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Abstract

The invention relates to a modular DC-DC converter (1) comprising a first DC voltage side (2) with two first DC voltage connections (21, 22), a second DC voltage side (3) with two second DC voltage connections (31, 32), a first module arm (4) with two first module arm connections (7), and a second module arm (5) with two second module arm connections (8). The first module arm (4) and a first inductor (23) are arranged in series between the two first DC voltage connections (21, 22), wherein the second module arm (5) and a second inductor (33) are arranged in series between the two second DC voltage connections (31, 32), wherein the first module arm (4), the second module arm (5) and a mesh capacitor (61) are arranged in series in such a way that a mesh circuit (6) is formed, wherein the module arms (4, 5) are designed to generate a respective voltage (uM1, uM2) having a DC voltage portion and an AC voltage portion with a first frequency (f1). The invention also relates to a DC voltage network (10) with a DC-DC converter (1) of this type. The invention further relates to a method for operating a modular DC-DC converter (1) of this type or a DC voltage network (10) of this type.
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