A flying capacitor type boost converter, soft switching control method, medium and device

By introducing a simple resonant circuit of resonant inductor and resonant capacitor into the Boost converter, the problems of high switching voltage stress and large losses in traditional Boost converters are solved, soft switching is achieved, electromagnetic interference is reduced, and frequency and production efficiency are improved.

CN122159682APending Publication Date: 2026-06-05NINGBO GINLONG TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO GINLONG TECH
Filing Date
2026-05-07
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Traditional Boost converters suffer from high voltage stress on the switching transistors, large switching losses, difficulty in implementing soft switching, imperfect modal analysis, and startup shock issues in high boost ratio applications.

Method used

A flying capacitor-type Boost converter is adopted, and a simple resonant circuit is constructed through the resonant inductor and resonant capacitor to realize the soft switching conduction of the switching transistor. Combined with the duty cycle D to select the mode sequence and resonant control during the dead time, complex auxiliary circuits and frequency conversion control are avoided.

Benefits of technology

It effectively reduces switching losses, increases switching frequency, reduces the size of magnetic components, and reduces electromagnetic interference, making it suitable for low-cost digital controllers and mass production.

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Abstract

The application discloses a flying capacitor type Boost converter, a soft switching control method, a medium and equipment; the converter further comprises a resonant inductor and two resonant capacitors on a traditional architecture; the resonant inductor is connected in series between the middle node of a series branch formed by an energy storage inductor and two switch tubes, and the two resonant capacitors are connected in parallel with the two switch tubes respectively, so that the resonant inductor and the resonant capacitors constitute a resonant loop for soft switching conduction of the switch tubes. The soft switching control method performs soft switching conduction on the switch tubes of the converter; the medium, equipment and system are used for implementing the soft switching control method. The application has the beneficial effects that the simple resonant loop constructed by the resonant inductor and the resonant capacitor can realize soft switching conduction of all the switch tubes, and can effectively reduce the switching loss. Since the soft switching is realized, the switching frequency can be significantly improved, and the volume of the magnetic elements in the converter can be greatly reduced.
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Citation Information

Patent Citations

  • Flying capacitance type three-level BOOST circuit control method and system

    CN115940625A

  • Trapezoidal wave current soft switching method of interleaved DC-DC converter

    CN121939773A

  • Soft-turn-on Boost converter for high-voltage large-current output

    CN220382944U

  • Resonant switched capacitor DC / DC converter

    US20200119635A1