Over-temperature protection system and method for a rectifier power supply

CN121238468BActive Publication Date: 2026-06-09SHENZHEN HZ-TECH CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: SHENZHEN HZ-TECH CO LTD
Filing Date: 2025-10-14
Publication Date: 2026-06-09

AI Technical Summary

Technical Problem

Existing rectifier power supply over-temperature protection systems suffer from insufficient accuracy and poor adaptability under wide-temperature and multi-voltage conversion conditions. This leads to false triggering of protection under low-load conditions and missed over-temperature reports under high-load linear wide-temperature rotation conditions. Furthermore, frequent start-stop cycles when the protection is released reduce the continuity of power supply operation and the accuracy of over-temperature protection.

Method used

By collecting temperature rise threshold information from key heat source areas inside the rectifier power supply, determining the over-temperature adjacent quantity in multiple voltage conversion intervals, performing adjustment verification, obtaining negative temperature alarm trends, determining the heat exceeding the limit boundary and graded heat transfer indicators, setting differential temperature false trip constraints and over-temperature hysteresis sequences, achieving layered alarms, and improving the accuracy and reliability of over-temperature protection.

Benefits of technology

It significantly improves the accuracy of over-temperature protection of rectifier power supplies under wide temperature and voltage conversion conditions, avoids false triggering and insufficient heat dissipation caused by temperature measurement deviation, enhances anti-interference and operational stability, and improves the efficiency of over-temperature fault handling.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides an over-temperature protection system and method of a rectifier power supply, relates to the technical field of over-temperature alarm, collects temperature rise threshold information of a power supply component; adjusts and verifies all over-temperature adjacent quantities, obtains a negative temperature alarm trend of the power supply component when normally working for a preset time, determines a heat-causing out-of-limit boundary of the power supply component when performing linear wide-temperature rotation in a current working condition according to the negative temperature alarm trend, determines a differential temperature malfunction restraint of the power supply component at an over-temperature shutdown point according to a hierarchical heat exchange index, determines an over-temperature hysteresis sequence of the power supply component when automatically releasing an over-temperature protection state according to the differential temperature malfunction restraint, determines a directional early warning level of the rectifier power supply when performing over-temperature early warning protection according to the heat-causing out-of-limit boundary and the over-temperature hysteresis sequence, and performs layered alarm on the over-temperature state of the power supply component. The application can finely control the whole process of over-temperature protection under the wide-temperature and multi-voltage conversion working condition of the rectifier power supply, so as to improve the accuracy of over-temperature protection.

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