Method and device for determining junction temperature of turn-off thyristor, storage medium and electronic equipment

By establishing a quantitative relationship between the storage time, working current and working junction temperature of the shutdown thyristor, the problem of inaccurate junction temperature measurement in the prior art is solved, and high sensitivity and high accuracy junction temperature online monitoring is achieved, ensuring the safe and stable operation of the system.

CN119881583AActive Publication Date: 2025-04-25北京怀柔实验室
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Patent Information

Application Number
CN202510374452.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-27
Publication Date
2025-04-25
Estimated Expiration
2045-03-27

AI Technical Summary

Technical Problem

In the prior art, the junction temperature measurement of the thyristor device that can be turned off is inaccurate, threatening the safe and stable operation of the system and equipment.

Method used

By determining the predetermined relationship between the storage time, operating current and operating junction temperature characterizing the shutdown thyristor, the actual storage time and actual operating current are obtained, and the actual operating junction temperature of the device is determined based on these parameters.

Benefits of technology

The sensitivity and accuracy of device junction temperature online monitoring is achieved, and the interference of DC bus voltage fluctuations on junction temperature measurement is avoided, ensuring the safe and stable operation of the system and equipment.

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Abstract

The invention provides a turn-off thyristor junction temperature determination method and device, a storage medium and electronic equipment. The method comprises the following steps: determining a predetermined relationship representing a relationship among storage time, working current and working junction temperature of a turn-off thyristor, the storage time being a time length for delaying turn-off of the turn-off thyristor due to an internal carrier storage effect of the turn-off thyristor in a turn-off process, and the working junction temperature of the turn-off thyristor being a time length for delaying turn-off of the turn-off thyristor; the working current is the current flowing through the turn-off thyristor before the turn-off thyristor is actively turned off; the actual storage time and the actual working current of the turn-off thyristor are obtained, the actual storage time is the actual storage time, and the actual working current is the actual working current; and determining the actual working junction temperature of the turn-off thyristor according to the actual storage time, the actual working current and a predetermined relationship. The problem that in the prior art, junction temperature measurement of a turn-off thyristor device is inaccurate, and safe and stable operation of a system and equipment is threatened is at least solved.
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Citation Information

Patent Citations

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