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Radiator based on circular radiating of liquid metal or alloy thereof for high-capacity direct-current circuit breaker

A technology of DC circuit breakers and liquid metals, applied to circuits, components of protective switches, electrical components, etc., to achieve the effects of flexible and diverse structures, novel methods and structures, and high heat transfer efficiency

Inactive Publication Date: 2013-09-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is the first attempt in the thermal design of switching appliances, and there is no relevant report in the published literature and patents at home and abroad

Method used

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  • Radiator based on circular radiating of liquid metal or alloy thereof for high-capacity direct-current circuit breaker
  • Radiator based on circular radiating of liquid metal or alloy thereof for high-capacity direct-current circuit breaker
  • Radiator based on circular radiating of liquid metal or alloy thereof for high-capacity direct-current circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] attached figure 1 Shown is a heat sink for a permanent magnet field driven DC circuit breaker. As mentioned above, the pipeline of the radiator is a closed structure from the end to the end, and the low melting point liquid metal or its alloy working fluid is housed in the pipeline. From the perspective of electrical insulation, the outer layer of the pipeline is made of silicone rubber insulating material, and the inner layer is a metal copper tube, and the low melting point liquid metal working fluid flows in the copper tube. In the middle of the radiator pipe is installed a permanent magnet excited micro drive pump. The structure of the pump see figure 1(b) shown. The micropump is embedded in a small section of the pipeline, and the cross-sectional structure of the pump is different from that of the pipeline. In this example, the upper and lower width of the section of the copper pipe may be 1 cm to 1.5 cm, but the distance between the poles of the upper and lowe...

Embodiment 2

[0029] attached figure 2 Shown is a heat sink for DC circuit breakers driven by electric excitation. The main difference between the radiator in this embodiment and the radiator in the previous specific embodiment is that the permanent magnet in the excitation device in the electromagnetic pump is replaced by an excitation coil, and the shape of the stator silicon steel is also changed at the same time. figure 2 The scheme of the electromagnetic pump in this embodiment is given in (b). In the figure, both sides of the liquid metal provide a DC power supply for the current in the direction of the vertical pipeline. The design of the DC power supply is similar to that of the permanent magnet drive. The shape of the silicon steel punching sheet of the excitation circuit is a square silicon steel sheet with an air gap, and the width of the air gap is about 0.3mm to 1mm, which is used to flow through the liquid metal. There is an insulating layer between the liquid metal workin...

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Abstract

The invention discloses a radiator based on circular radiating of liquid metal or alloy thereof for high-capacity direct-current circuit breaker. Heat of a high-temperature component is taken away by the aid of flowing of working media made of metal or alloy thereof with the melting point lower than the room temperature, and the problems of high heating power density and difficulty in radiating caused by the high-capacity direct-current circuit breaker are solved by means of quickly reducing the temperature of positions with excessively high temperature rise. The radiator particularly structurally comprises a radiator structure and adopts liquid metal flowing driving modes, a far-end radiating mode and the like. The radiator with the radiating technology has the advantages that the radiator is high in radiating efficiency, small in dimensions, flexible in radiating structure, wide in application range and low in environmental pollution. The liquid metal flowing driving modes used in the radiator for the direct-current circuit breaker include an electric excitation liquid metal driving mode and a magnetic excitation liquid metal driving mode.

Description

Technical field: [0001] The invention relates to the heat dissipation technology of switching appliances, in particular to the use of liquid metal with a low melting point or its alloy as a working fluid in the heat dissipation of a large-capacity DC circuit breaker, and two methods of electric excitation and permanent magnet excitation are used to realize liquid metal or Driven by its alloy working fluid. Background technique: [0002] The DC power supply system has the advantages of good system stability, low line loss, high transmission power density, and low environmental pollution. also increasing. At the same time, the DC power supply system has also attracted much attention in the field of national defense. With the rapid development of major national defense equipment and civilian key facilities, the demand for DC power supply system capacity is also gradually increasing. With the increase of the capacity of the DC power supply system, the requirements for the cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/52H01H71/00
Inventor 纽春萍荣命哲吴翊陈骏星溆杨飞马瑞光
Owner XI AN JIAOTONG UNIV