CN216216469U

CN216216469U - Removable formula modularization low pressure three-level converter

Info

Publication number: CN216216469U
Application number: CN202122369896.9U
Authority: CN
Inventors: 吴顺利
Original assignee: Dajiao New Energy Technology Shanghai Co ltd
Current assignee: Dajiao New Energy Technology Shanghai Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-04-05
Anticipated expiration: 2031-09-28

Abstract

The utility model discloses a replaceable modular low-voltage three-level converter which comprises a main control seat, a mounting seat and a connecting seat, wherein the mounting seat is arranged on one side of the main control seat, the connecting seat is arranged on one side of the mounting seat, a relay output and soft start module is arranged at the top of the main control seat, and a power IGBT module is arranged at the top of the mounting seat. According to the utility model, through the arrangement of the relay output and soft start module, the power IGBT module, the power energy storage module and the LCL filter module, the whole device is independent of the design capacity, the design form and the modular combined structure of device selection, the capacity can be freely combined within a certain range and is not limited by the original design and design requirements, the power device can be flexibly designed according to a uniform interface no matter in a single component or a multi-component parallel mode, and various collocations can be flexibly carried out no matter in imported products or domestic products, so that the universality and the applicability are further improved.

Description

Removable formula modularization low pressure three-level converter

Technical Field

The utility model relates to the technical field of converter equipment, in particular to a replaceable modular low-voltage three-level converter.

Background

In the existing circuit equipment, along with the increasing use of converters, in order to meet different use requirements, the types of the converters are also continuously changed, a control circuit of the converter is divided into a loop control circuit and a closed loop control circuit according to a control mode, the loop control circuit is mainly used for some special equipment with low requirements, and the closed loop control circuit has the functions of automatic control and regulation and is widely applied to various working machines.

The modular low-voltage three-level converter in the prior art has the following defects:

1. the comparison document CN103138533B discloses a traction converter box and a traction converter, which comprises a box plate and a cavity formed by the box plate in a surrounding mode, wherein an air inlet and an air outlet communicated with the cavity are formed in the box plate, the air inlet and the air outlet are formed in two ends of the cavity respectively, the position of the air inlet is not lower than that of the air outlet, and the cavity is used for accommodating a power module, a cooling fan and an input reactor. According to the traction converter box body and the traction converter, the positions and relative heights of the air inlet and the air outlet are set, so that gas entering the traction converter box body can be dispersed in the whole cavity space, and the heat generated by each part in the cavity can be taken away by wind energy discharged from the air outlet;

2. in the prior art, most of low-voltage three-level converters are limited by specific capacity and working conditions when used, so that the device is insufficient in adaptability and limited in utilization space.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a replaceable modular low-voltage three-level converter, which solves the above problems.

In order to achieve the purpose, the utility model provides the following technical scheme that the device comprises a main control seat, a mounting seat and a connecting seat, wherein the mounting seat is arranged on one side of the main control seat, and the connecting seat is arranged on one side of the mounting seat;

and a relay output and soft start module is arranged at the top of the main control seat.

Preferably, a power IGBT module is arranged on the top of the mounting seat.

Preferably, a power energy storage module is arranged at the top of the connecting seat.

Preferably, one side of the power IGBT module is electrically connected to an LCL filter module.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the arrangement of the relay output and soft start module, the power IGBT module, the power energy storage module and the LCL filter module, the whole device is independent of the design capacity, the design form and the modular combined structure of device selection, the capacity can be freely combined within a certain range and is not limited by the original design and design requirements, the power device can be flexibly designed according to a uniform interface no matter in a single component or a multi-component parallel mode, and various collocations can be flexibly carried out no matter in imported products or domestic products, so that the universality and the applicability are further improved.

2. In order to compress the volume, the main modules in the three-level internal part of the module are integrated into a whole, a small and accurate model is adopted, the model comprises a power assembly and a sampling and control port, the space use can be reduced to a great extent through effective structural form combination, a wiring control system and a sampling system can be arranged in an effective space spare range, the space is effectively utilized, and the size and the volume of the whole product are greatly reduced.

Drawings

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

FIG. 2 is a schematic view of the mounting base structure of the present invention;

FIG. 3 is a schematic structural diagram of a power IGBT module according to the present invention;

fig. 4 is a schematic side view of the structure of the LCL filter module of the present invention.

In the figure: 1. a main control seat; 2. a mounting seat; 3. a linking seat; 4. a relay output and soft start module; 5. a power IGBT module; 6. a power storage module; 7. and the LCL filter module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be a fixed connection or a movable connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1, 2, 3, and 4, in an embodiment of the present invention, a replaceable modular low-voltage three-level converter includes a main control base 1, a mounting base 2, and a connection base 3, a relay output and soft start module 4 is disposed at the top of the main control base 1, a power energy storage module 6 is disposed at the top of the connection base 3, the mounting base 2 is disposed at one side of the main control base 1, a power IGBT module 5 is disposed at the top of the mounting base 2, one side of the power IGBT module 5 is electrically connected to an LCL filter module 7, and the connection base 3 is disposed at one side of the mounting base 2;

through the arrangement of the relay output and soft start module 4, the power IGBT module 5, the power energy storage module 6 and the LCL filter module 7, the whole device is independent of the design capacity, the modular combined structure of the design form and the device selection type can be freely combined in a certain range and is not limited by the original design and design requirements, the power device can be flexibly designed according to a unified interface no matter in a single component or a multi-component parallel mode, various collocation can be flexibly carried out no matter in imported products or domestic products, the universality and the applicability are further improved, in order to compress the volume, main modules in the three-level internal part of the module are integrally integrated, a small and accurate model is adopted, the module not only comprises a power component, but also comprises a sampling and control port, and the space utilization can be reduced to a great extent through the effective structural form combination, in an effective space free range, a wiring control system and a sampling system can be arranged, the space is effectively utilized, the size and the volume of the whole product are greatly reduced, and the final design capacity and the capacity range can be adjusted by the power energy storage module 6 according to the number of capacitors; the power conversion component is divided into three layers (a power device interface layer, a power driving layout layer and a power driving layer) to carry out modular model output and unify the form of a power interface; the LCL filtering module can be designed to be changed into an LC filtering mode or an L filtering mode, and the switching frequency can be adjusted on the selected LCL module as necessary.

In the utility model, the working steps of the device are as follows:

through the matching work of the relay output and soft start module 4, the power IGBT module 5, the power energy storage module 6 and the LCL filter module 7, the relay output and soft start module 4 is mainly used for controlling and protecting the power output part of the converter, a relay loop is arranged in the relay output and soft start module to control power output and disconnection, a soft start loop is electrified, a power supply detection circuit is electrified, through the modularized optimization design idea, the module has sufficient design allowance, can be used in a certain capacity range without adding devices and loops, does not depend on the design form and the structural form of a power component of the converter, and only needs to be connected with an independently designed power interface terminal; the power IGBT module 5 is mainly used for switching power switches of the converter, a certain structural size space is reserved by the module through a modularized optimal design thought, not only can an imported power device under the capacity specification be accommodated, but also a domestic power device can be compatible, a single power assembly can be used, the power IGBT module can also be used in a parallel mode of a plurality of power assemblies, and a power interface is also designed independently, so that the problem that different assembly forms and module designs of different manufacturers under the same capacity specification are difficult to give consideration to comprehensively is solved, and meanwhile, the whole replacement of the damaged power module is facilitated; the power energy storage module 6 is mainly used for power energy storage of the converter, the design capacity of the energy storage module can be in a range through a modularized optimal design thought, a power interface part of the energy storage module is independently designed and does not depend on a specific power device and a structural form, and the energy storage module is provided with an independent voltage detection interface and can flexibly interface with a sampling card; the LCL filter module 7 is mainly used for filtering output of the converter, the components are designed to be integrally integrated through a modularized optimal design idea, the combination capacity of the components is optimized, the L or C is not required to be placed at different positions, the structural form change caused by inconsistent L or C parameters in subsequent change is caused, the matching of new L or C is difficult, and the modularized design idea can be changed and replaced integrally;

it will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a removable formula modularization low pressure three-level converter, includes main control seat (1), mount pad (2) and links up seat (3), its characterized in that: a mounting seat (2) is arranged on one side of the main control seat (1), and a connecting seat (3) is arranged on one side of the mounting seat (2) for people;

and a relay output and soft start module (4) is arranged at the top of the main control seat (1).

2. A replaceable modular low-voltage three-level converter according to claim 1, characterized in that: and a power IGBT module (5) is arranged at the top of the mounting seat (2).

3. A replaceable modular low-voltage three-level converter according to claim 1, characterized in that: and a power energy storage module (6) is arranged at the top of the connecting seat (3).

4. A replaceable modular low-voltage three-level converter according to claim 2, characterized in that: one side of the power IGBT module (5) is electrically connected with an LCL filter module (7).