A low-ripple high-gain composite cuk-sepic dc converter based on a switch inductor module

By introducing a switching inductor module into the composite Cuk-SEPIC DC-DC converter, a bipolar output is constructed, which solves the problems of large input current ripple and limited voltage gain, realizes low ripple and high gain voltage conversion, and improves the stability and economy of the system.

CN224790553UActive Publication Date: 2026-09-22HARBIN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202522144246.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-10
Publication Date
2026-09-22
Estimated Expiration
2035-10-10

AI Technical Summary

Technical Problem

Existing composite Cuk-SEPIC DC-DC converters suffer from excessive input current ripple and limited voltage gain, making it difficult to efficiently and reliably convert unstable DC power in photovoltaic grid-connected systems.

Method used

By using a switching inductor module and connecting it to the SEPIC and Cuk output modules, a bipolar output is formed, which achieves current ripple suppression and voltage gain enhancement.

Benefits of technology

It significantly reduces input current ripple, improves voltage gain, reduces power loss, extends device life, is suitable for high-stability scenarios, reduces costs, and simplifies system architecture.

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Abstract

The utility model discloses a kind of low ripple high gain composite Cuk-SEPIC direct current converters based on switching inductance module, belong to power electronic converter technical field, including switching inductance module, switching node module, the output module of SEPIC and the output module of Cuk, compared with conventional DCDC converter, switching inductance module is additionally arranged in converter main circuit, the output end of switching inductance module is connected with switching node module, the utility model passes through embedding switching inductance structure, can significantly improve voltage transmission ratio, satisfy low input high output scene demand, compared with transformer boost circuit, the utility model can reduce the voltage, current stress of switching device, reduce damage risk, prolong service life and improve system reliability, the optimized current path and energy conversion process of the utility model can reduce power loss, improve efficiency, and part circuit structure is simple, component is few, control is convenient, beneficial to reduce cost and improve response speed.
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