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High pressure damping resistor and manufacturing process thereof

A damping resistor, high-voltage technology, applied in resistors, resistor parts, non-adjustable metal resistors, etc., can solve the problem of poor protection performance of resistance wires or resistance strips, unfavorable high-voltage power system stability, and impact on damping resistors. Service life and other issues, to achieve the effect of ensuring heat dissipation performance, improving convenience, and good sealing

Pending Publication Date: 2018-03-30
GUANGDONG FULLDE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned exposed resistance wire will make the protection performance of the resistance wire or resistance band poor, so that the accumulated pollution will cause the problem of easy arcing of the resistor, which will affect the service life of the damping resistor
Moreover, the heat radiation generated by the exposed resistance wire will affect the parts around it for a long time, which is not conducive to maintaining the stability of the high-voltage power system; in addition, the damping resistor needs to have a certain volume to ensure the heat dissipation effect of the resistor itself

Method used

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  • High pressure damping resistor and manufacturing process thereof
  • High pressure damping resistor and manufacturing process thereof
  • High pressure damping resistor and manufacturing process thereof

Examples

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Effect test

Embodiment 1

[0028] Such as figure 1 with figure 2 The high-voltage damping resistor shown has a resistance band 1 wrapped in an epoxy resin casting body 2, and the two ends of the resistance band 1 protrude from the epoxy resin casting body 2 so as to connect with the external circuit Connection, of course, the epoxy resin casting body can also be other heat-conducting covering body. Such as image 3 As shown, preferably, the resistance band 1 is a resistance band made of nickel-chromium alloy and is bent into a curved shape in a zigzag manner. The shape can effectively increase the weight and strength of the resistance band. The resistance band 1 can also be a curved surface of other structures, such as a shape-forming surface, that is, as long as it is a curved surface. The epoxy resin pouring body 2 is provided with a heat dissipation pipe 3, and the heat dissipation pipe 3 surrounds the resistance band 1 evenly, and the nozzle of the heat dissipation pipe 3 communicates with the e...

Embodiment 2

[0031] A manufacturing process of a high-voltage damping resistor in this embodiment includes the following steps:

[0032] Step 1. Preheat the vacuum casting tank to 90°C, preheat the mixing container to 76°C, weigh 90 parts of epoxy resin, 45 parts of curing agent, 15 parts of toughening agent and 220 parts of filler, and add appropriate amount Accelerator, then mix the above raw materials evenly and preheat to 46°C, so that the container and raw materials are in a preheated state, preventing the problem of uneven heating or overheating of raw materials during the preparation process;

[0033] Step 2. Pour the preheated raw materials into the mixing container, then heat the mixing container to 65°C and vacuumize it. The raw materials are stirred and degassed in the mixing container for 2 hours to discharge the raw material bubbles;

[0034] Step 3: Place the resistance band and heat dissipation pipe in the damping resistor in the mold used to form the epoxy resin casting bod...

Embodiment 3

[0036] A manufacturing process of a high-voltage damping resistor in this embodiment includes the following steps:

[0037] Step 1. Preheat the vacuum casting tank to 94°C, preheat the mixing container to 80°C, weigh 100 parts of epoxy resin, 55 parts of curing agent, 25 parts of toughening agent and 280 parts of filler, and add appropriate amount Accelerator, then mix the above raw materials evenly and preheat to 50°C, so that the container and raw materials are in a preheated state, and prevent the problem of uneven heating or overheating of raw materials during the preparation process;

[0038] Step 2. Pour the preheated raw materials into the mixing container, then heat the mixing container to 70°C and vacuumize the mixture. Stir and degas the mixture in the mixing container for 2.5 hours to discharge the raw material bubbles;

[0039] Step 3: Place the resistance band and heat dissipation pipe in the damping resistor in the mold used to form the epoxy resin casting body, ...

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Abstract

The invention relates to the technical field of resistors, in particular to a high pressure damping resistor and a manufacturing process thereof. The structure includes a resistance band, the resistance band is covered by a heat conducting coating body, and both ends of the resistance band stretch out of the heat conducting coating body, radiating tubes also run through the heat conducting coatingbody, and the rube orifices of the radiating tubes lead to the outside of the heat conducting coating body. The high pressure damping resistor has the advantages of good sealing performance, good heat dissipation and small volume. According to the manufacturing process of the high pressure damping resistor, an epoxy resin casting body can be cast under vacuum, the strength of the epoxy resin casting body is improved and defects are reduced.

Description

technical field [0001] The invention relates to the technical field of resistors, in particular to a high-voltage damping resistor and a manufacturing process thereof. Background technique [0002] In the high-voltage power system, it is necessary to set a damping resistor between the gap or the bypass switch, which is used to limit and damp the current of the capacitor in the high-voltage power system, so as to prevent the discharge process damaged. Since damping resistors are used in high-voltage power systems, there will be large electric heat latent in the resistors. In the prior art, in order to ensure the heat dissipation performance of damping resistors, the resistance strips or resistance wires of damping resistors are exposed to the environment. However, the above-mentioned exposed resistance wire will make the protection performance of the resistance wire or resistance strip poor, so that the accumulated pollution will cause the problem of easy arcing of the resis...

Claims

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Application Information

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IPC IPC(8): H01C1/024H01C1/084H01C3/00H01C17/02
CPCH01C1/024H01C1/084H01C3/00H01C17/02
Inventor 谢庆坚廖汉卿王锦全莫焕堂
Owner GUANGDONG FULLDE ELECTRONICS
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