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Improved high-power thyristor

A thyristor and high-power technology, applied in the field of high-power thyristors, can solve problems such as easy deviation, unpredictability, and junction temperature drift, and achieve the effects of small measurement error, reduced temperature deviation, and fast response speed

Inactive Publication Date: 2014-11-26
STATE GRID CORP OF CHINA +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calculation and modeling of thyristor junction temperature requires a comprehensive understanding of thyristor operating conditions, loss characteristics, heat dissipation characteristics of radiators, etc. Modeling is complex and prone to deviations
In addition, as the thyristor components are put into use, the changes in various thermal parameters of the thyristors and radiators caused by aging will cause drifts in junction temperature, which cannot be predicted in modeling calculations

Method used

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Examples

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Embodiment 1

[0031] Such as Figure 1-2 As shown, in the invention of this example, it is a 6-inch thyristor, which includes a ceramic ring shell, a tube base 1, two layers of protective layers 2 wrapped outside the chip 3, and a tube cover 4; the temperature sensor includes a grating 7 and an optical fiber, so The optical fiber includes a bare optical fiber 5 and an outer armored optical fiber 6, and the bare optical fiber 5 is arranged inside the thyristor. A hole is radially opened on the edge of the tube base 1 , and the bare optical fiber 5 passes through the radial hole to the axial hole on the inner surface of the tube base, and is connected to the chip 3 through the radial hole of the protective layer 2 below the tube base 1 . The chip 3 includes an anode-side molybdenum sheet, a silicon sheet and a cathode-side molybdenum sheet that are buckled axially into the ceramic ring shell sequentially. The silicon wafer includes a phosphorus-expanded region N+, a short base region P1, a l...

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Abstract

A high-power thyristor. The thyristor comprises a thyristor base (1), a ceramic circular shell, a protective layer (2), a chip (3) and a thyristor cover (4) which are arranged in sequence in an axial direction, wherein a rubber sleeve is wrapped around the outer edge of the chip (3); the protective layer (2) and the chip (3) are buckled into the ceramic circular shell in sequence; and a temperature sensor is arranged in the axial direction of the thyristor. By additionally installing a precise temperature sensor on the chip of the thyristor, the real-time monitoring of the temperature of the chip of the thyristor is realized, and the temperature measurement deviation can be reduced, forming intuitive real-time temperature data, and providing reliable conditions for junction temperature protection and other intellectualized functions of a direct-current converter valve.

Description

Technical field: [0001] The invention relates to a thyristor, in particular to a high-power thyristor with a built-in temperature sensor. Background technique: [0002] The DC converter valve is the core equipment of the high-voltage direct current transmission (HVDC) system. It is composed of hundreds of high-power thyristors connected in series and their auxiliary circuits. [0003] The thyristor, the core component of the DC converter valve, is made of semiconductor materials. Like other semiconductor devices, the thyristor is also a temperature-sensitive component. In actual operation, the chip temperature of the thyristor, that is, the junction temperature, is generally strictly limited within a certain temperature range, such as within 120°C, otherwise the thyristor will fail. If the thyristor is operated at high temperature for a long time, it will not only reduce the operating reliability of the converter valve, but also greatly reduce the service life of the thyris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L29/74H01L23/367
CPCG01K11/32H01L23/051H01L2924/0002H01L2924/00
Inventor 查鲲鹏魏晓光杨俊高冲
Owner STATE GRID CORP OF CHINA
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