阅读说明：本技术 牵引辅助变流器用功率电阻集成式组件 (Power resistance integrated component for traction auxiliary converter ) 是由 郭彭昱 李锦� 王喜乐 郑旭阳 王晓妮 于 2020-12-21 设计创作，主要内容包括：本发明涉及牵引辅助变流器用功率电阻,具体为一种牵引辅助变流器用功率电阻集成式组件。解决牵引辅助变流器内的现有功率电阻存在的重量和体积大、散热量大等问题。牵引辅助变流器用功率电阻集成式组件包括牵引辅助变流器用慢放电阻和接地电阻,以及水冷基板,慢放电阻和接地电阻采用平面厚膜电阻器,并固定于水冷基板上。牵引辅助变流器用慢放电阻、接地电阻采用平面厚膜电阻器,并与水冷基板一起组成功率电阻集成式组件,利于机车变流器小型化、轻量化设计；牵引辅助变流器用功率电阻的集成,有利于减少电缆数量及长度,简化布局；牵引辅助变流器用功率电阻集成于水冷基板,采用水冷散热的冷却方式,有效减少功率电阻对柜内的散热。(The invention relates to a power resistor for a traction auxiliary converter, in particular to a power resistor integrated assembly for the traction auxiliary converter. The problems that the existing power resistor in the traction auxiliary converter is heavy in weight and size, large in heat dissipation capacity and the like are solved. The power resistance integrated assembly for the traction auxiliary converter comprises a slow discharge resistor and a ground resistor for the traction auxiliary converter and a water-cooling substrate, wherein the slow discharge resistor and the ground resistor are planar thick film resistors and are fixed on the water-cooling substrate. The slow-release resistor and the grounding resistor for the traction auxiliary converter adopt plane thick-film resistors and form a power resistor integrated assembly together with the water-cooling substrate, so that the locomotive converter is beneficial to miniaturization and lightweight design; the integration of the power resistor for the traction auxiliary converter is beneficial to reducing the number and the length of cables and simplifying the layout; the power resistor for the traction auxiliary converter is integrated on the water-cooling base plate, and the cooling mode of water-cooling heat dissipation is adopted, so that the heat dissipation of the power resistor in the cabinet is effectively reduced.)

1. A power resistance integrated assembly for a traction auxiliary converter is characterized by comprising a slow discharge resistor and a ground resistor for the traction auxiliary converter and a water-cooling substrate, wherein the slow discharge resistor and the ground resistor are planar thick film resistors and are fixed on the water-cooling substrate.

2. The power resistance integrated assembly for the traction auxiliary converter according to claim 1, wherein the slow-discharge resistor and the ground resistor are connected in series and in parallel by copper bars.

3. The power resistance integrated assembly for the traction auxiliary converter according to claim 1 or 2, wherein the high-voltage connection of the power resistance integrated assembly for the traction auxiliary converter is realized by adopting copper bars externally.

4. The traction-assisted converter power resistor integrated assembly as recited in claim 3, wherein the connection of the water-cooled base plate to the cooling pipeline is achieved by a quick water joint.

5. The traction-assisted converter power resistor integrated assembly as defined in claim 3, wherein, in use, the traction-assisted converter power resistor integrated assembly is mounted on a side plate of the traction-assisted converter case.

6. The traction-assisted converter power resistor integrated assembly as defined in claim 4, wherein, in use, the traction-assisted converter power resistor integrated assembly is mounted on a side plate of the traction-assisted converter case.

Technical Field

The invention relates to a power resistor for a traction auxiliary converter, in particular to a power resistor integrated assembly for the traction auxiliary converter.

Background

The rapid development of the electric railway also puts higher demands on the reliability, light weight, and compactness of the traction auxiliary converter. The inside of the traction auxiliary converter cabinet is approximate to a sealed environment, and potential safety hazards to other elements can be caused when temperature rise generated by a plurality of power devices in the converter cabinet is gathered in the cabinet, so that the heat dissipation capacity of the power devices is required to be as small as possible; meanwhile, the requirement of miniaturization and light weight of the converter cabinet is considered, and on the premise of meeting the requirements of functionality and economy, devices with small size and light weight are adopted as far as possible. The main circuit of the traction auxiliary converter is shown in fig. 1, and a power resistor for the traction auxiliary converter is arranged in a black frame and comprises a slow-release resistor and a grounding resistor. The power type slow-release resistor and the grounding resistor commonly used by the traction auxiliary converter at present mostly adopt a structure type of a porcelain tube painted wire winding resistor. The resistance values of the slow-release resistor and the grounding resistor are generally dozens of or even hundreds of kilohms, and due to the limitation of the domestic resistor manufacturing process, a plurality of porcelain tubes are usually required to be connected in series and in parallel by paint winding resistors to realize the model selection, so that the weight and the volume of the resistor are greatly increased, the difficulty of the layout of the converter cabinet is aggravated, the volume and the weight of the converter cabinet are also increased, and the method is in contradiction with the small-size and light-weight of the converter cabinet. In addition, because the slow-release resistor and the grounding resistor operate under the high voltage of the intermediate direct current loop of the traction auxiliary converter for a long time, the self heat dissipation capacity of the resistor is large, and a natural cooling mode is adopted, so that heat circulation is not facilitated in the sealed environment of the converter cabinet, and the potential safety hazard is aggravated. A plurality of slow-release and grounding resistors are scattered and arranged in the converter cabinet, so that the installation, the maintenance and the maintenance of the traction auxiliary converter are not facilitated.

Disclosure of Invention

The invention solves the problems of the existing power resistor in the traction auxiliary converter and provides a power resistor integrated assembly for the traction auxiliary converter.

The invention is realized by adopting the following technical scheme: the power resistance integrated assembly for the traction auxiliary converter comprises a slow discharge resistor and a ground resistor for the traction auxiliary converter and a water-cooling substrate, wherein the slow discharge resistor and the ground resistor are planar thick film resistors and are fixed on the water-cooling substrate. The slow-release resistor and the grounding resistor for the traction auxiliary converter adopt plane thick-film resistors and form a power resistor integrated assembly together with the water-cooling substrate, so that the locomotive converter is beneficial to miniaturization and lightweight design; the traction auxiliary converter is integrated with a slow-release resistor and a grounding resistor together and shares a water-cooling substrate, so that the installation space of the converter cabinet is reduced, and the installation and maintenance of the converter are facilitated; the integration of the power resistor for the traction auxiliary converter is beneficial to reducing the number and the length of cables and simplifying the layout; the power resistor for the traction auxiliary converter is integrated on the water-cooling base plate, and a cooling mode of water-cooling heat dissipation is adopted, so that the heat dissipation of the power resistor in the cabinet is effectively reduced, and the safety and reliability of the converter are improved.

The technical scheme of the invention has the following beneficial effects:

1. the design of the power resistor flat-die thick-film structure is beneficial to the miniaturization and light-weight design of the locomotive converter;

2. the power resistor is designed into a flat die thick film type structure, so that the reliability of the resistor is improved;

3. the power resistor is designed in an integrated mode, so that the number and the length of cables are reduced, and the layout is simplified;

4. the power resistor is designed in an integrated mode, so that the efficiency and convenience of installation, maintenance and repair are improved;

5. the water-cooling heat dissipation design of the power resistor effectively reduces the heat dissipation capacity of the power resistor in the cabinet and improves the safety and reliability.

Drawings

FIG. 1 is a schematic diagram of a main circuit of a traction-assist converter;

FIG. 2 is a block diagram of a planar thick film resistor;

FIG. 3 is a schematic structural diagram of a water-cooled substrate;

fig. 4 is a schematic structural diagram of a power resistor integrated assembly for a traction auxiliary converter according to the present invention.

Detailed Description

The power resistance integrated assembly for the traction auxiliary converter comprises a slow discharge resistor and a ground resistor for the traction auxiliary converter and a water-cooling substrate, wherein the slow discharge resistor and the ground resistor are planar thick film resistors and are fixed on the water-cooling substrate. As shown in fig. 2 and 3: considering the small-size lightweight, the convenience of installation and maintenance and the safe reliability of the traction auxiliary converter, the slow-release resistor and the grounding resistor for the traction auxiliary converter adopt a planar thick film type resistor structure, on the premise of meeting the functional requirements of the power resistor, the volume and the weight of the resistor are greatly reduced compared with those of a painted winding resistor or a cylindrical thick film resistor, the resistor is completely integrated on a water-cooling substrate, and the water-cooling heat dissipation is adopted, so that the volume and the weight of the power resistor are reduced, the heat dissipation capacity of the power resistor in the converter cabinet is reduced, and the safety of the converter cabinet is improved. As shown in fig. 4: the slow-release resistors and the ground resistors for the traction auxiliary converter are integrally fixed on a water-cooling substrate, the slow-release resistors and the ground resistors are connected in series and in parallel by adopting copper bars inside the water-cooling substrate to form a power resistor integrated assembly, the high-voltage connection of the power resistor integrated assembly for the traction auxiliary converter can be realized by adopting the copper bars outside, and the connection of the water-cooling substrate and a cooling pipeline is realized by adopting a quick water connector, so that the heat dissipation of the power resistors is ensured, the heat dissipation capacity in a cabinet is effectively reduced, and the safe and reliable design of a converter cabinet is facilitated; the integrated design is convenient for the power resistor for the traction auxiliary converter to be installed inside the converter cabinet as a component, so that the installation, maintenance and repair efficiency is improved. When the power resistor integrated assembly for the traction auxiliary converter is used, the power resistor integrated assembly is arranged on a side plate of a traction auxiliary converter cabinet body, the assembly can be installed and maintained on the front side, wiring is simple and convenient, layout is reasonable and compact, installation and maintenance time is short, and heat dissipation capacity in the cabinet is small. The design concept of light weight, safety and reliability of rail transit rolling stocks is met.