CN220307108U

CN220307108U - Unit structure with IGBT module

Info

Publication number: CN220307108U
Application number: CN202321951843.0U
Authority: CN
Inventors: 史万平; 祖宝能; 杨宏威
Original assignee: HUAIBEI PINGXIANG ELECTRIC FURNACE CO Ltd
Current assignee: HUAIBEI PINGXIANG ELECTRIC FURNACE CO Ltd
Priority date: 2023-07-24
Filing date: 2023-07-24
Publication date: 2024-01-05
Anticipated expiration: 2033-07-24

Abstract

The utility model relates to a unit structure with IGBT modules, which comprises a filter capacitor, wherein fixed plates are arranged on two sides of the filter capacitor, a group of IGBT module groups are respectively arranged on each fixed plate, the IGBT module groups are connected with a control assembly through control bus rows arranged on the fixed plates, IGBT output sub-rows and absorption capacitors corresponding to the number of the IGBT modules are respectively arranged on each group of IGBT module groups, each IGBT module output is connected with an IGBT output main row through one IGBT output sub-row, each IGBT output sub-row is sleeved with a current sensor, the current sensor is connected with the control assembly, one side of the filter capacitor is provided with a direct current negative electrode cover and a direct current positive electrode cover, the two sides of the direct current negative electrode cover and the direct current positive electrode cover are fixedly arranged through two fixed plates, an insulating cover is arranged between the direct current negative electrode cover and the direct current positive electrode cover, and cooling pipelines are respectively arranged on the direct current negative electrode cover and the direct current positive electrode cover. The utility model has the advantages of modularized design, small occupied space, very convenient assembly and disassembly, stable operation and capability of meeting the requirements of quick assembly, maintenance and repair.

Description

Unit structure with IGBT module

Technical Field

The utility model relates to a unit structure with an IGBT module, and belongs to the technical field of induction furnace power supply cabinets.

Background

The induction furnace is an electrothermal device which uses the electromagnetic induction principle to induce current in the metal material in an alternating magnetic field, thereby heating the material until the material is melted. The main components of the induction furnace comprise an inductor, a furnace body, a power supply, a capacitor, a control system and the like, wherein the structure from rectification, IGBT (insulated gate bipolar transistor) and voltage transformation to a load is adopted, the IGBT variable-frequency power supply is in current feedback series connection, a direct-current reactor element is not needed, the starting success rate is 100% no matter the cold furnace or the hot furnace is powered on, an IGBT module is used as a main element to save more energy, and the IGBT module is far stronger than a silicon controlled rectifier in the aspects of switching frequency and on-off, so that in a power supply cabinet of the induction furnace, more IGBT modules are used at the beginning, such as the IGBT variable-frequency dual-power supply cabinet disclosed in application number 2021113217242, and the first power supply cabinet and the second power supply cabinet comprise an IGBT frequency converter, a direct-current filter capacitor, a connecting pipe and an alternating-current capacitor; the connecting pipe is connected with the anti-reflux diode, the IGBT frequency converter and the direct current filter capacitor are connected in parallel on the connecting pipe, and the IGBT frequency converter and the alternating current capacitor are connected in series. For the design of the cabinet body, how to optimally design the hardware structure of the part needs to be considered, so that the occupied space is ensured to be smaller, meanwhile, the factors of convenience in maintenance, low maintenance cost and the like need to be considered, and a more reasonable structure needs to be designed.

Disclosure of Invention

In view of the above problems in the prior art, a main object of the present utility model is to provide a unit structure with an IGBT module, wherein the IGBT module and a filter capacitor are integrated to form a modular structure, which ensures smaller occupied space, and is convenient to install and maintain and low in maintenance cost.

The technical scheme provided by the utility model is as follows: the utility model provides a unit structure with IGBT module, including filter capacitor, set up the fixed plate in filter capacitor's both sides, set up a set of IGBT module group respectively on every fixed plate, IGBT module group is connected and controls the IGBT subassembly through setting up the control bus row on the fixed plate, all set up the IGBT output that corresponds with IGBT module quantity on every set of IGBT module group and divide row and absorb electric capacity, every IGBT module output is connected the IGBT output total row through an IGBT output branch row, all cup joint a current sensor on every IGBT output branch row, be used for gathering the current signal, current sensor connects control assembly, one side of filter capacitor is provided with both sides and passes through two fixed plate fixed mounting's direct current negative pole cover and direct current positive pole cover, set up the insulating cup between direct current negative pole cover and direct current positive pole cover, all be provided with the cooling pipeline on direct current negative pole cover and direct current positive pole cover.

Furthermore, a water cooling plate is further arranged between the fixed plate and the IGBT module group, a hollow pipeline is arranged in the water cooling plate, and an inlet pipe and an outlet pipe are arranged on the outer surface of the water cooling plate and connected with the internal pipeline to form a loop.

Furthermore, the inlet pipe and the outlet pipe of the water cooling plate are arranged on the top surface.

Further, the side face of the water cooling plate is used for fixedly mounting IGBT module groups, and each IGBT module group is provided with four IGBT modules.

Further, the direct current negative electrode cover is located the inlayer, and the insulating cover is located the intermediate level, and the direct current positive electrode cover is located the skin, sets up cooling line on the direct current negative electrode cover medial surface, sets up cooling line on the lateral surface of direct current positive electrode cover.

Furthermore, a current transformer is arranged between the direct current negative electrode cover and the filter capacitor and used for detecting the short circuit of the IGBT bridge arm and ensuring stable operation.

Further, each of two sides of the upper portion of the filter capacitor is provided with a lifting lug, two fixing blocks are arranged on the side wall of the filter capacitor below the lifting lug, the fixing plates are fixed on the side face of the filter capacitor through the two fixing blocks, each of two sides of the bottom face of the filter capacitor is provided with a mounting edge, and the mounting edges are provided with mounting holes for mounting and fixing.

Furthermore, water inlet and outlet pipes of the cooling pipeline of the direct current negative electrode cover are positioned at the lower part of the cover body, and a connecting plate is arranged at the top of the cover body and used for connecting the direct current negative electrode inlet wire row; the water inlet and outlet nozzles of the cooling pipeline of the direct current positive electrode cover are all positioned at the upper part of the cover body, and a connecting plate is arranged at the bottom of the cover body and used for connecting the direct current positive electrode inlet wire row.

Further, the IGBT output bus adopts a hollow square tube structure, a mounting plate is arranged on the tube wall, and a mounting hole is formed in the mounting plate and used for quick connection.

The utility model has the beneficial effects that: the integration level is high, and the occupied space is small; the modular design is convenient to assemble and disassemble, and the requirements of rapid installation, maintenance and repair are met; the cooling pipeline is reasonable in design, good in cooling effect, low in operating temperature and stable in operation.

Drawings

FIG. 1 is a perspective view of the structure of the present utility model;

fig. 2 is a schematic diagram of an explosive structure according to the present utility model.

Legend description: 1. a filter capacitor; 2. a fixing plate; 3. an IGBT module group; 4. a control bus bar; 5. IGBT output is divided into rows; 6. an absorption capacitance; 7. IGBT output total row; 8. a current sensor; 9. a DC negative electrode cover; 10. an insulating cover; 11. a DC positive electrode cover; 12. a cooling pipeline; 13. a water cooling plate; 14. a current transformer; 15. and (5) lifting the lugs.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model will be further described with reference to the drawings and the specific embodiments

Example 1

The unit structure with the IGBT modules shown in fig. 1 and 2 comprises a filter capacitor 1, wherein fixed plates 2 are arranged on two sides of the filter capacitor 1, a group of IGBT module groups 3 are respectively arranged on each fixed plate 2, the IGBT module groups 3 are connected with a control component through a control bus bar 4 arranged on the fixed plates 2, and the control component controls the on and off of the IGBT modules through the control bus bar 4. IGBT output sub-row 5 and absorption capacitor 6 corresponding to the number of IGBT modules are arranged on each IGBT module group 3, the absorption capacitor 6 is used for filtering interference, each IGBT module output is connected with the IGBT output main row 7 through one IGBT output sub-row 5, each IGBT output sub-row 5 is sleeved with a current sensor 8, the current sensor 8 is connected with a control assembly, one side of the filter capacitor 1 is provided with a direct current negative electrode cover 9 and a direct current positive electrode cover 11, two sides of the direct current negative electrode cover 9 and the direct current positive electrode cover 11 are fixedly installed through two fixing plates 2, an insulating cover 10 is arranged between the direct current negative electrode cover 9 and the direct current positive electrode cover 11, and cooling pipelines 12 are arranged on the direct current negative electrode cover 9 and the direct current positive electrode cover 11.

As a preferred embodiment, a water cooling plate 13 may be disposed between the fixing plate 2 and the IGBT module group 3, a hollow pipe is disposed in the water cooling plate 13, and an inlet pipe and an outlet pipe are disposed on an outer surface of the water cooling plate to be connected with the internal pipe to form a loop.

Preferably, both the inlet pipe and the outlet pipe of the water cooling plate 13 are provided on the top surface. The connection of the cooling pipeline is convenient. The side of the water cooling plate 13 is used for fixedly mounting the IGBT module groups 3, and each IGBT module group 3 has four IGBT modules. The current sensor 8 is used to monitor the operating condition of each IGBT module.

As a specific design, the dc negative electrode cover 9 is located at the inner layer, the insulating cover 10 is located at the middle layer, the dc positive electrode cover 11 is located at the outer layer, the cooling pipeline 12 is provided on the inner side surface of the dc negative electrode cover 9, and the cooling pipeline 12 is provided on the outer side surface of the dc positive electrode cover 11.

As the preferable design, water inlet and outlet ports of a cooling pipeline 12 of the direct current negative electrode cover 9 are all positioned at the lower part of the cover body, and a connecting plate is arranged at the top of the cover body and used for connecting a direct current negative electrode inlet wire row; the water inlet and outlet ports of the cooling pipeline 12 of the direct current positive electrode cover 13 are all positioned at the upper part of the cover body, and a connecting plate is arranged at the bottom of the cover body and used for connecting the direct current positive electrode inlet wire row.

A current transformer 14 is arranged between the direct current negative electrode cover 9 and the filter capacitor 1 and is used for detecting bridge arm short circuit and ensuring stable operation.

As a specific design, each of two sides of the upper part of the filter capacitor 1 is provided with a lifting lug 15, two fixing blocks are arranged on the side wall of the filter capacitor below the lifting lug 15, the fixing plate 2 is fixed on the side face of the filter capacitor through the two fixing blocks, each of two sides of the bottom surface of the filter capacitor 1 is provided with a mounting edge, and the mounting edges are provided with mounting holes for mounting and fixing.

The IGBT output bus 7 adopts a hollow square tube structure, a mounting plate is arranged on the tube wall, and a mounting hole is arranged on the mounting plate for quick connection.

Finally, it should be noted that: the embodiments described above are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A cell structure having an IGBT module, characterized in that: including filter capacitor, set up the fixed plate in filter capacitor's both sides, set up a set of IGBT module group respectively on every fixed plate, IGBT module group is connected and is controlled the IGBT subassembly through the control bus row that sets up on the fixed plate, all set up IGBT output branch that corresponds with IGBT module quantity on every set of IGBT module group and arrange and absorb electric capacity, every IGBT module output is connected IGBT output total row through an IGBT output branch, all cup joint a current sensor on every IGBT output branch, current sensor connects control assembly for gather current signal, one side of filter capacitor is provided with both sides through two fixed plate fixed mounting's direct current negative pole cover and direct current positive pole cover, set up the insulating cup between direct current negative pole cover and direct current positive pole cover, all be provided with the cooling pipeline on direct current negative pole cover and direct current positive pole cover.

2. The cell structure with IGBT module according to claim 1, characterized in that: a water cooling plate is further arranged between the fixing plate and the IGBT module group, a hollow pipeline is arranged in the water cooling plate, and an inlet pipe and an outlet pipe are arranged on the outer surface of the water cooling plate and connected with the internal pipeline to form a loop.

3. The cell structure with IGBT module according to claim 2, characterized in that: the inlet pipe and the outlet pipe of the water cooling plate are arranged on the top surface.

4. A cell structure with IGBT module according to claim 3, characterized in that: the side of the water cooling plate is used for fixedly mounting IGBT module groups, and each IGBT module group is provided with four IGBT modules.

5. The cell structure with IGBT module according to claim 1, characterized in that: the direct current negative electrode cover is located the inlayer, and the insulating cover is located the intermediate level, and the direct current positive electrode cover is located the skin, sets up cooling line on the direct current negative electrode cover medial surface, sets up cooling line on the lateral surface of direct current positive electrode cover.

6. The cell structure with IGBT module of claim 5 wherein: and a current transformer is arranged between the direct current negative electrode cover and the filter capacitor.

7. The cell structure with IGBT module according to claim 1, characterized in that: the filter capacitor comprises a filter capacitor body, wherein the filter capacitor body is characterized in that two sides of the upper part of the filter capacitor body are respectively provided with a lifting lug, two fixing blocks are arranged on the side wall of the filter capacitor body below the lifting lugs, the fixing plates are fixed on the side face of the filter capacitor body through the two fixing blocks, two mounting edges are respectively arranged on two sides of the bottom face of the filter capacitor body, and mounting holes are formed in the mounting edges and are used for mounting and fixing.

8. The cell structure with IGBT module according to claim 1, characterized in that: the water inlet and outlet pipe openings of the cooling pipeline of the direct current negative electrode cover are all positioned at the lower part of the cover body, and a connecting plate is arranged at the top of the cover body and used for connecting the direct current negative electrode inlet wire row; the water inlet and outlet nozzles of the cooling pipeline of the direct current positive electrode cover are all positioned at the upper part of the cover body, and a connecting plate is arranged at the bottom of the cover body and used for connecting the direct current positive electrode inlet wire row.

9. The cell structure with IGBT module according to claim 1, characterized in that: the IGBT output bus adopts a hollow square tube structure, a mounting plate is arranged on the tube wall, and mounting holes are formed in the mounting plate and used for quick connection.