Parallel power supply system based on feedback injection and current sharing method

CN122026708BActive Publication Date: 2026-06-09NANJING OSIC LTD CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING OSIC LTD CO
Filing Date
2026-04-14
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing parallel power supply systems suffer from load distribution imbalances caused by the dispersion of device parameters, dynamic stability issues caused by multiple control loops, and a lack of proactive performance degradation management mechanisms, making it difficult to meet the requirements of high power density and high reliability.

Method used

A parallel power supply system based on feedback injection is adopted. The output current value and rate of change of each branch are collected in real time through a central current sharing controller. The output voltage is adjusted by analog compensation signal to achieve dynamic current sharing and protection, including adaptive current sharing control logic and multi-level fault response strategy.

Benefits of technology

It improves the current sharing accuracy and lifespan of the system, ensures dynamic stability, realizes proactive management of the health status of the power supply system, and meets high availability requirements.

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Abstract

This invention relates to the field of power conversion technology, specifically to a parallel power supply system and current sharing method based on feedback injection. The system includes multiple power conversion branches, a central current sharing controller, and a current detection circuit. Each branch contains a power management unit, an active isolation circuit, and a feedback regulation network. The controller collects current and rate of change in real time, injects analog compensation signals into the branch voltage feedback pin through the feedback network, and adjusts the output voltage without changing the internal reference of the chip, achieving dynamic balance of the load current. When the rate of change of current in any power conversion branch exceeds a warning threshold, a derating signal is generated to control its current reduction ratio, enabling online derating operation. Furthermore, this invention also provides a current sharing method applied to the above-mentioned parallel power supply system. This invention achieves non-intrusive and precise control, effectively extending system life and ensuring business continuity by actively derating to protect sub-optimal modules.
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