Power converter

The power converter addresses the trade-off between stability and responsiveness by employing a reactor and capacitor with feedforward control to maintain proportional input-output relationships, ensuring stable and responsive output voltage adjustments.

JP7883122B2Active Publication Date: 2026-07-01SINFONIA TECHNOLOGY CO LTD
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Patent Information

Application Number
JP2022133841
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-08-25
Publication Date
2026-07-01
Estimated Expiration
2042-08-25

AI Technical Summary

Technical Problem

Existing power converters face a trade-off between output voltage stability and responsiveness, with reducing the capacitance of the output capacitor improving responsiveness but compromising stability, and increasing capacitance enhances stability but degrades responsiveness.

Method used

A power converter with a reactor and capacitor on the output side, utilizing a voltage control unit and current control unit with feedforward control to maintain a proportional relationship between the output voltage and input current, incorporating a feedforward control unit that uses reactor and internal resistance estimates to adjust the output voltage independently of output current fluctuations.

Benefits of technology

The solution enables high output voltage responsiveness while maintaining stability, even under load fluctuations, by controlling the input current based on the output voltage command and using feedback to correct errors, thus simplifying the control system and enhancing responsiveness.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide an electric power conversion device that can ensure the stability of an output voltage while improving the responsiveness of the output voltage.SOLUTION: An electric power conversion device has an output-side reactor 22 and an output-side capacitor 21 on an output side, and adjusts an output voltage Vo of the output-side capacitor 21. The electric power conversion device includes a voltage controller 31 that outputs an output value Idcl* so as to control the output voltage Vo of the output-side capacitor 21 according to a voltage command Vref, and a current controller 32 that controls an input current Ic of the output-side capacitor 21 according to the output value Idcl* of the voltage controller 31. The current controller 32 includes a feed forward controller 40 that performs feed forward control by using an estimated reactor value and an estimated internal resistance value of the output-side reactor 22 so that the output value Idcl* of the voltage controller 31 and the input current Ic of the output-side capacitor 21 are in a proportional relationship.SELECTED DRAWING: Figure 3
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Citation Information

Patent Citations

  • Switching power supply device

    JP2011160565A

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  • Power supply device and industrial vehicle

    JP2016131429A

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    JP2017099196A