Intelligent semiconductor device for subway power supply 24-pulse rectifier cabinet

Abstract

An intelligent semiconductor device for a metro power supply 24-pulse wave rectifier cabinet comprises a tube shell seat and a tube shell cover, a tube core and a silver sheet are sequentially arranged on the tube shell seat, positioning rings are arranged at two ends of the tube core, the tube shell cover is located on the tube shell seat, the tube shell cover and the tube shell seat are connected in a sealed mode to form a sealed cavity, and inert protective gas is filled in the sealed cavity. A mounting hole with the diameter of 5-8 mm is formed in the tube shell cover, a temperature sensor is embedded in the mounting hole and located in the axial center of the outer side of the tube shell cover, and the distance between the top of the temperature sensor and the inner surface of the tube shell cover is not larger than 2 mm. According to the invention, a new structure is selected through simulation analysis calculation, and under the condition that the electrical structure, the internal mechanical structure and the sealing structure of the existing semiconductor device are not influenced, the measurement function of the device junction temperature is added, the measurement of the semiconductor device junction temperature is realized, the real-time state identification is realized, and the datamation of the reliability of the semiconductor device is realized.

Description

technical field [0001] The invention belongs to the field of subway power supply, in particular to an intelligent semiconductor device for a 24-pulse rectifier cabinet for subway power supply. Background technique [0002] The subway power supply system is a key system in the subway field. After years of high-speed construction, the scale and volume of subway operating lines and subway power supply equipment have increased, and the service life has increased, resulting in an increase in failure rates, which can easily cause safety hazards such as outages in vehicle tunnels and excessive passenger flow in stations. In this case, establish a large-scale networked power supply intelligent operation and maintenance system that integrates four core functions, including real-time perception and early warning of key equipment status in the power supply system, life-cycle management, business process intelligent drive, and expert system diagnosis and analysis, to ensure that the pow...

AI Technical Summary

Problems solved by technology

Relying on the device design and the heat dissipation analysis and calculation of the device in the rectifier design process, and after special characteristic tests to ensure the stable performance of the semiconductor diode, the real-time process state of the semiconductor diode junction temperature cannot be monitored

[0005] This kind of semiconductor diode device only has the ability to turn on and off the current, but does not have the function of state perception. It cannot accurately detect the process state and manage its entire life. Daily manual inspections cannot accurately identify and judge, so that the subway power supply system can operate safely. There are hidden dangers

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