CN219395151U - Gate driving plate and frequency converter - Google Patents

Abstract

The utility model provides a gate-level driving plate and a frequency converter, wherein the gate-level driving plate comprises a mounting plate, a driving plate and a plurality of IGBT modules; the mounting plate comprises a first mounting surface and a second mounting surface which are arranged up and down; the driving plate is vertically arranged on the first installation surface; each IGBT module is connected with the second mounting surface. The utility model can reduce the volume of the frequency converter and the cost of the frequency converter.

Description

Gate driving plate and frequency converter

Technical Field

The utility model relates to the technical field of frequency converters, in particular to a gate-level driving plate and a frequency converter.

Background

With the rapid development of industry, the current frequency converters with voltage levels of 380V and 660V are difficult to meet the requirements of various enterprises, and the frequency converters with higher power are required to meet the requirements of the enterprises. The conventional frequency converter is designed to be that one IGBT module corresponds to one gate-level driving plate, along with the increase of the power of the frequency converter, the number of IGBT modules required by the frequency converter is increased, so that the number of gate-level driving plates required by the frequency converter is increased, the length of the gate-level driving plates of the conventional frequency converter is longer, and the large increase of the number of gate-level driving plates can lead to the increase of the volume of the frequency converter, thereby further increasing the cost.

Disclosure of Invention

The utility model provides a gate-level driving plate and a frequency converter, and aims to solve the problems of overlarge volume and high cost of the frequency converter caused by the fact that the volume of the existing gate-level driving plate is long and the number of gate-level driving plates required by a high-power frequency converter is large.

In a first aspect, the present utility model provides a gate drive board comprising a mounting plate, a drive board, and a plurality of IGBT modules; the mounting plate comprises a first mounting surface and a second mounting surface which are arranged up and down; the driving plate is vertically arranged on the first installation surface; each IGBT module is connected with the second mounting surface.

Further, the mounting board comprises three IGBT modules, and the three IGBT modules are sequentially connected with the second mounting surface along the longitudinal direction of the mounting board.

Further, the three IGBT modules are a first IGBT module, a second IGBT module, and a third IGBT module, respectively, and the first IGBT module, the third IGBT module, and the second IGBT module are sequentially connected with the second mounting surface along the longitudinal direction of the mounting board.

Further, a connection line is further included, and the connection line is connected with the first IGBT module.

Further, a conducting piece is arranged at one end, which is not connected with the first IGBT module, of the connecting wire, and an opening is formed in the conducting piece.

Further, each IGBT module is spliced with the second mounting surface.

Further, the long side of the driving plate is vertically mounted on the first mounting surface.

Further, the drive plate is welded to the first mounting surface.

In a second aspect, the utility model also provides a frequency converter comprising a plurality of gate drive plates as described in any one of the preceding claims.

Further, the door level driving device comprises 3N door level driving plates, wherein N is more than or equal to 2.

According to the gate-level driving plate and the frequency converter disclosed by the utility model, the driving plate is vertically arranged on the first mounting surface of the mounting plate, the IGBT module is connected to the second mounting surface so as to reduce the length of the gate-level driving plate, and meanwhile, the mounting plate can be connected with a plurality of IGBT modules so as to reduce the number of gate-level driving plates required by the frequency converter, so that the volume of the frequency converter can be reduced, and the cost of the frequency converter is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a gate driving board according to an embodiment of the present utility model;

FIG. 2 is a layout of a gate driving board according to an embodiment of the present utility model;

fig. 3 is a topology diagram of a type I three-level inverter.

Reference numerals: 100. a gate-level driving plate; 10. a mounting plate; 11. a first mounting surface; 12. a second mounting surface; 20. a driving plate; 30. an IGBT module; 31. a first IGBT module; 32. a second IGBT module; 33. a third IGBT module; 40. a connecting wire; 41. a conductive member; 42. and (5) opening holes.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In addition, directional terms such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc. as used herein refer only to the attached drawings and the direction of the product in use. Accordingly, directional terminology is used to describe and understand the utility model and is not limiting of the utility model. In addition, in the drawings, structures similar or identical to those of the drawings are denoted by the same reference numerals.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a gate-level driving board 100 according to an embodiment of the present utility model, and as shown in fig. 1, the gate-level driving board 100 includes a mounting board 10, a driving board 20, and a plurality of IGBT modules 30; the mounting plate 10 comprises a first mounting surface 11 and a second mounting surface 12 which are arranged up and down; the driving plate 20 is vertically installed on the first installation surface 11; each of the IGBT modules 30 is connected to the second mounting surface 12.

The mounting board 10 includes a first mounting surface 11 and a second mounting surface 12 that are disposed up and down, the driving board 20 is vertically mounted on the first mounting surface 11, that is, the driving board 20 is mutually perpendicular to the first mounting surface 11 of the mounting board 10, so as to reduce occupation of horizontal space, meanwhile, the second mounting surface 12 is connected with a plurality of IGBT modules 30, a plurality of sockets may be disposed on the second mounting surface 12, and the IGBT modules 30 are mounted on the sockets, so that occupation of horizontal space may be further reduced. When the three-phase frequency converter is used, for example, a 1140V three-phase frequency converter is taken as an example, nine IGBT modules 30 are needed to form an inverter, and then the three-phase frequency converter can be provided with three gate-level driving boards 100, each gate-level driving board 100 comprises a mounting board 10, each mounting board 10 is provided with three IGBT modules 30, the number of the gate-level driving boards 100 is reduced from nine to three, and the occupation of the volume of the frequency converter is greatly reduced.

As a further embodiment, three IGBT modules 30 are included, and the three IGBT modules 30 are connected to the second mounting surface 12 in sequence along the longitudinal direction of the mounting board 10.

In general, one gate driving board 100 is connected with three IGBT modules 30 to form one phase of the inverter, two gate driving boards 100 may be provided for a two-phase inverter, and three gate driving boards 100 may be provided for a three-phase inverter.

As a further embodiment, the three IGBT modules 30 are a first IGBT module 31, a second IGBT module 32, and a third IGBT module 33, and the first IGBT module 31, the third IGBT module 33, and the second IGBT module 32 are connected to the second mounting surface 12 in sequence along the longitudinal direction of the mounting board 10.

Each IGBT module 30 may include two IGBT tubes, for example, the first IGBT module 31 may include a T1 tube and a T5 tube, the second IGBT module 32 may include a T2 tube and a T3 tube, the third IGBT module 33 may include a T4 tube and a T6 tube, and the IGBT driving circuit is a common technical means in the art and will not be described herein. The first IGBT module 31 including the T1 pipe may be connected to the outside of the mounting board 10 so as to be connected to other circuits.

As a further embodiment, a connection line 40 is further included, and the connection line 40 is connected to the first IGBT module.

The connection line 40 is an active clamp detection line of the T1 pipe, one end of which is connected to one end of the T1 pipe, and the other end of which is used for being connected to other circuits.

As a further embodiment, a conducting member 41 is disposed at an end of the connecting wire 40 not connected to the first IGBT module 31, and an opening 42 is disposed on the conducting member 41.

The bolt of the collector of the T1 tube of the first IGBT module 31 is connected to the connecting wire 40, the other end of the connecting wire 40 is provided with a conducting member 41, and an opening 42 is provided on the conducting member 41, so that the gate driving board 100 can be connected to other circuits in a flying wire manner, thereby meeting the safety distance of the high-power frequency converter and reducing the maintenance cost. The connection sequence of the first IGBT module 31, the second IGBT module 32, and the third IGBT module 33 is shown in fig. 1, and the connection line 40 can be conveniently connected to other circuits.

As a further example, each of the IGBT modules 30 is plugged into the second mounting surface 12.

Wherein, can be equipped with a plurality of sockets on second installation face 12, the quantity of socket is unanimous with the quantity of IGBT module 30, thereby IGBT module and socket grafting are installed on second installation face 12, can further reduce the length of door level drive plate 100, utilize the Z axle space of converter.

As a further example, the long side of the driving plate 20 is vertically mounted on the first mounting surface 11.

The long side of the driving board 20 is connected with the first mounting surface 11, so that the Z-axis space can be reasonably utilized, and the excessive occupation of the Z-axis space is avoided.

As a further example, the driving plate 20 is welded to the first mounting surface 11.

The driving board 20 can be connected with the mounting board 10 through a solder pad to improve the stability of electrical connection.

The present utility model also provides a frequency converter comprising a plurality of gate drive plates 100 according to any of the above embodiments.

The inverter includes an inverter, and the inverter may include a plurality of gate driving boards 100, for example, 3N gate driving boards 100, where N is greater than or equal to 2, so as to meet different use requirements.

As a further example, 3N of the gate level driving boards 100 are included, wherein N.gtoreq.2.

The inverter of the frequency converter may include 3N gate-level driving boards 100, for example, 6 gate-level driving boards 100. As shown in fig. 2, fig. 2 is a layout diagram of the gate driving boards 100, and fig. 2 includes three gate driving boards 100 from right to left, and as can be seen from fig. 2, the space between each gate driving board 100 is smaller, so that the occupation of the horizontal space of the frequency converter can be reduced. Each gate-level driving board 100 includes three IGBT modules 30, a first IGBT module 31, a third IGBT module 33, and a second IGBT module 32 in this order from bottom to top, the first IGBT module 31 includes a T1 pipe and a T5 pipe, the third IGBT module 33 includes a T4 pipe and a T6 pipe, and the second IGBT module 32 includes a T2 pipe and a T3 pipe. Numerals 1, 2 and 3 in fig. 2 correspond to numerals 1, 2 and 3 in fig. 1, respectively, fig. 3 is a topology diagram of the I-type level inverter, and the T1 pipe to T6 pipe in fig. 2 corresponds to the T1 pipe to T6 pipe in fig. 3.

According to the gate-level driving plate and the frequency converter, the occupied horizontal space of the gate-level driving plate is reduced by utilizing the Z-axis space, and the volume of the frequency converter is reduced by reducing the number of the gate-level driving plates, so that the cost of the frequency converter can be reduced.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A gate drive board for a frequency converter, comprising:

the mounting plate comprises a first mounting surface and a second mounting surface which are arranged up and down;

the driving plate is vertically arranged on the first installation surface; and

and each IGBT module is connected with the second mounting surface.

2. The gate drive board of claim 1, comprising three of said IGBT modules connected in sequence to said second mounting surface in a longitudinal direction of said mounting plate.

3. The gate drive board of claim 2, wherein the three IGBT modules are a first IGBT module, a second IGBT module, and a third IGBT module, respectively, which are connected to the second mounting surface in order in the longitudinal direction of the mounting board.

4. A gate drive plate as claimed in claim 3, further comprising a connection line connected with the first IGBT module.

5. The gate driving board according to claim 4, wherein a conducting member is disposed at an end of the connecting wire not connected to the first IGBT module, and an opening is disposed on the conducting member.

6. The gate drive board of claim 2, wherein each of the IGBT modules is plugged into the second mounting surface.

7. The door stage drive plate according to claim 1, wherein the long side of the drive plate is mounted perpendicularly to the first mounting surface.

8. The gate drive plate of claim 1 wherein said drive plate is welded to said first mounting surface.

9. A frequency converter comprising a plurality of gate drive plates according to any one of claims 1 to 8.

10. A transducer according to claim 9, comprising 3N of said gate drive plates, wherein N is ≡2.