CN215528890U

CN215528890U - Permanent magnet traction converter

Info

Publication number: CN215528890U
Application number: CN202121944980.2U
Authority: CN
Inventors: 张德雨; 鲍庆臣; 其他发明人请求不公开姓名
Original assignee: CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
Current assignee: CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-01-14
Anticipated expiration: 2031-08-18

Abstract

The utility model relates to a permanent magnet traction converter, which comprises a box body and various electrical components arranged in the box body, wherein the box body comprises: the device comprises a partition plate, at least one cavity and a rotary frame; the baffle is arranged in the box body, the box body is divided into at least one cavity through the baffle, and at least one electric component is arranged in the cavity; the revolving frame is movably connected to the side wall of the box body, and at least one electric component is arranged on the revolving frame. The utility model has the advantages of small equipment volume, high integration level, reasonable layout and convenient maintenance.

Description

Permanent magnet traction converter

Technical Field

The utility model relates to a converter, in particular to a permanent magnet traction converter.

Background

The utility model relates to the technical field of rail transit equipment. Permanent magnet traction converters, usually installed at the bottom of the vehicle, mainly function to convert the direct current of the traction grid into alternating current, thus dragging the permanent magnet traction motor. Generally, one inverter circuit unit can realize the dragging of one permanent magnet traction motor. In order to drive four permanent magnet traction motors, four inverter circuit units are needed. If integrate four inverter circuit units on same module, can reduce permanent magnetism traction converter's box volume admittedly, but single module volume is on a large side, and modular design does not have the commonality, is unfavorable for the modularization realization of circuit, and the placing and the heat dissipation of drive plate also have the problem. Therefore, the existing solution is prone to integrate two inverter circuit units into one power module, and place two power modules in a permanent magnet traction converter box to realize the traction of four permanent magnet traction motors. Based on this, a permanent magnet traction converter which can realize the miniaturization of the box body and can ensure the heat dissipation of the power module is needed.

The patent with publication number CN212412507U discloses an integrated type traction high-pressure tank, belongs to the technical field of electric equipment of urban rail transit traction systems, and aims to solve the problem that the disassembly, assembly and maintenance of equipment at the bottom of a train are difficult in the related technology. The integrated traction high-voltage box comprises a cabinet body, and a high-voltage unit, a pre-charging unit, an inversion unit, a filtering unit, an emergency traction unit, a control unit and a circuit detection unit which are electrically connected and installed in the cabinet body. The units are integrated in the cabinet body, and the units are electrically connected through copper bars or cables. The cabinet body is installed in the train bottom, makes the train bottom cleaner and tidier, and the overall arrangement is simpler. Compared with the split type layout equipment, the integrated layout equipment does not need to independently set interfaces for each piece of equipment, so that the number and the types of the interfaces of the equipment under the vehicle are reduced, and the assembly difficulty is reduced. In addition, each unit is easier to run in the cabinet body, and the disassembly, assembly and maintenance of different units are facilitated.

Patent publication No. CN208623553U discloses a permanent magnet traction inverter, which includes: the traction control system comprises a box body, a power module and a traction control assembly, wherein the power module and the traction control assembly are arranged in the box body; the power module is arranged in the power installation chamber, and the traction control assembly is arranged in the control installation chamber; the power modules are connected with the traction control assembly, each power module is connected with two driving motors, and the power modules are used for controlling the driving motors to operate under the control of the traction control assembly. The utility model provides a permanent magnetism pulls dc-to-ac converter adopts the modularized design, has simplified the box overall arrangement of permanent magnetism pulls dc-to-ac converter, and assembly and maintenance are more convenient simultaneously.

The defects in the prior art are as follows:

1. the pre-charging loop part and the high-voltage output part are both positioned in the middle cavity, the distance between the pre-charging loop part and the high-voltage output part is relatively short, and the safety performance is low;

2. the box body has more integrated devices and larger size, and is not suitable for the platformization of products.

Therefore, in order to solve the defects, how to provide a permanent magnet traction converter can solve the problems of overlarge size of a box body and low safety; the device which can also improve the maintainability and the planarization of the product is a technical problem which needs to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems, the utility model provides a permanent magnet traction converter, which can solve the problems of overlarge size of a box body and low safety; and the maintainability and the planarization of the product can be improved.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the embodiment of the utility model provides a permanent magnet traction converter, which comprises a box body and various electrical components arranged in the box body, wherein the box body comprises:

a clapboard: the partition board is arranged inside the box body;

at least one cavity: the box body is divided into at least one cavity through a partition plate, and at least one electric component is arranged in the cavity;

a revolving frame: the revolving frame is movably connected to the side wall of the box body, and at least one electric component is arranged on the revolving frame.

Preferably, the case further includes:

at least one door assembly: the door assembly is movably arranged on the side wall of the box body through a door lock;

at least one bottom cover plate: the bottom cover plate is movably arranged at the lower part of the box body.

Preferably, the cavity includes:

a first sealed chamber: a main contactor, a pre-charging resistor and a power module are arranged in the first sealing cavity;

a second sealed chamber: a three-phase output contactor assembly and a three-phase output current sensor assembly are arranged in the second sealing cavity;

a third sealed cavity: a power module and a traction controller assembly are arranged in the third sealing cavity;

opening the cavity: and a filter reactor and a cooling fan are arranged in the open cavity.

Preferably, the permanent magnet traction converter further includes:

at least one air inlet: the cooling air inlet is arranged on the side wall of the box body, and cooling air enters the box body from the air inlet;

heat dissipation fins: the cooling air passes through the radiating fins from the air inlet;

cooling fan: the cooling air is arranged in the box body and blown out from the cooling fan through the heat dissipation fins;

at least one air outlet: and the cooling air is arranged on the side wall of the box body and flows out of the box body from the air outlet.

Preferably, the three-phase output contactor assembly and the three-phase output current sensor assembly are connected by a spraying copper bar.

Preferably, the rotary frame is adjacently arranged on the traction controller assembly, and the relay, the breaker and the weak current terminal piece are arranged on the rotary frame.

Preferably, the side wall of the box body is provided with a positive and negative line input, the positive and negative line input is connected with the main contactor, and a pre-charging contactor and a pre-charging resistor are arranged at a position close to the main contactor.

Preferably, the power modules are arranged in two groups, and the two groups of power modules are symmetrically arranged in the first sealed cavity and the third sealed cavity respectively.

Preferably, the filter reactor is arranged adjacent to the main contactor and the power module, two groups of three-phase output contactor assemblies are arranged adjacent to the power module, each group of three-phase output contactor assembly comprises two three-phase output contactors, each three-phase output contactor is correspondingly provided with a permanent magnet motor, and a magnetic ring is arranged on the front side of the UVW output on the side wall of the box body.

Preferably, the door assembly is provided with at least one anti-slip pin.

Compared with the prior art, the utility model has the advantages and positive effects that:

(1) the utility model provides a permanent magnet traction converter box which comprises a box body, a power module, a contactor assembly, a filter reactor, a fan assembly, a controller assembly, a three-phase output contactor assembly and the like, and is complete in function, high in integration level, reasonable in layout and small in equipment volume;

(2) according to the utility model, the three-phase output contactor assembly and the three-phase output current sensor assembly are connected by adopting the spraying copper bar, so that the problems of short distance, narrow space and incapability of wiring between the two assemblies are solved, and the wiring is simpler and more convenient and more compact;

(3) the front side of the traction controller assembly is provided with the revolving frame, the revolving frame is provided with the relay, the circuit breaker, the weak current terminal plate and the like, the revolving frame is provided with 3 hinges, the revolving frame can be opened to 95 degrees at most, the distance between the weak current device and the controller is shortened due to the design of the revolving frame, the wiring path of a control line is simplified, meanwhile, the space of a box body is fully utilized, the maintenance area is increased, the structural design is more compact, and the maintenance of the controller is not influenced;

(4) in order to facilitate the maintenance of devices, the door assembly, the first bottom cover plate and the second bottom cover plate are arranged, so that the maintenance of the devices is facilitated, and the door assembly is provided with the anti-falling pin to prevent the door assembly from falling off after the door lock fails;

(5) the cooling air duct is designed to be of a symmetrical structure, and the air inlets of the two groups of power modules are kept consistent, so that the heat dissipation air quantity of the two groups of power modules can be kept consistent, the respective heat dissipation requirements can be met, and the performance stability can be guaranteed;

(6) according to the utility model, the filter screens are arranged at the air inlet and the air outlet, so that large-particle dust and impurities can be filtered, and the cleanness of the cooling air duct is kept.

Drawings

Fig. 1 is a first schematic layout diagram of a traction converter box according to the present invention;

FIG. 2 is a second schematic layout of a traction converter case according to the present invention;

FIG. 3 is a third schematic layout of a traction converter case of the present invention;

FIG. 4 is a fourth schematic view of the sprayed copper bar of the present invention;

FIG. 5 is a schematic view of a turret of the present invention;

FIG. 6 is a schematic illustration of the anti-slip pin of the present invention;

FIG. 7 is a first schematic view of a cooling air duct;

fig. 8 is a schematic view of a cooling air duct.

In the above figures:

1. main contactor 2, precharge contactor

3. Pre-charging resistor 4 and filter reactor

5. A power module; 6. three-phase output contactor assembly

7. Three-phase output current sensor assembly 8 and cooling fan

9. Traction controller assembly 10, positive and negative line inputs

11. UVW output 12 and control connector

13. Door assembly 14 and spraying copper bar

16. Air inlet

17. Air outlet 18 and anti-drop pin

19. Radiating fin

22. Revolving rack 24, bottom cover plate one

25. Bottom cover plate 2

30. First sealed cavity 40 and second sealed cavity

50. Third sealed chamber 60, open chamber

100. Box body

Detailed Description

The technical solutions in the embodiments of the present invention will be fully described in detail below with reference to the accompanying drawings. It is obvious that the described embodiments are only some specific embodiments, not all embodiments, of the general technical solution of the present invention. All other embodiments, which can be derived by a person skilled in the art from the general idea of the utility model, fall within the scope of protection of the utility model.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 utility model aims to solve the problems that how to provide a permanent magnet traction converter can solve the problems of overlarge size of a box body and low safety; and the maintainability and the planarization of the product can be improved.

Fig. 1 is a schematic diagram of a first layout of a traction converter box, fig. 2 is a schematic diagram of a second layout of the traction converter box, fig. 3 is a schematic diagram of a third layout of the traction converter box, fig. 4 is a schematic diagram of a fourth sprayed copper bar of the utility model, fig. 5 is a schematic diagram of a revolving rack of the utility model, fig. 6 is a schematic diagram of a pin drop prevention of the utility model, fig. 7 is a schematic diagram of a cooling air duct, and fig. 8 is a schematic diagram of a cooling air duct.

The utility model designs a permanent magnet traction converter box which mainly comprises a box body 100, a power module, a contactor assembly, an electric reactor, a fan assembly, a controller assembly, a three-phase output contactor assembly, a three-phase output current sensor assembly and the like, wherein the assemblies with different functions are reasonably arranged in the box body, so that the conversion of electric energy between a direct current system and an alternating current system is realized, and four permanent magnet motors are driven.

The layout of the permanent magnet traction converter box of the utility model is shown in figures 1-6. The structural layout of the box body of the utility model is shown in fig. 1, and a partition board is arranged in the box body 100 and used for dividing each chamber into three sealed chambers and an open chamber.

As shown in fig. 1 to 6, an embodiment of the present invention provides a permanent magnet traction converter, including a box 100 and various electrical components disposed in the box, where the box 100 includes:

a clapboard: the partition board is arranged inside the box body;

the revolving rack 22: the revolving frame 22 is movably connected to the side wall of the box 100, and at least one electrical component is arranged on the revolving frame 22.

Further, the case 100 further includes:

at least one door assembly 13: the door assembly 13 is movably arranged on the side wall of the box body 100 through a door lock; at least one anti-slip pin 18 is provided on the door assembly 13.

At least one bottom cover plate: the bottom cover plate is movably disposed at the lower portion of the box body 100.

Further, the cavity includes:

first sealed chamber 30: a main contactor 1, a pre-charging contactor 2, a pre-charging resistor 3 and a power module 5 are arranged in the first sealing cavity 30;

second seal chamber 40: a three-phase output contactor assembly 6 and a three-phase output current sensor assembly 7 are arranged in the second sealing cavity 40; the three-phase output contactor assembly 6 is connected with the three-phase output current sensor assembly 7 through a spraying copper bar 14.

Third seal chamber 50: the power module 5 and the traction controller assembly 9 are arranged in the third sealed cavity 50;

open cavity 60: and a filter reactor 4 and a cooling fan 8 are arranged in the open cavity.

The rotary frame 22 is adjacently arranged on the traction controller assembly 9, and the rotary frame 22 is provided with a relay, a breaker and a weak current terminal piece.

The electric devices of the utility model are arranged in the chambers of the box body in the form of assemblies and modules according to the sequence of the wiring, so that the layout simplifies the wiring among the electric devices and is convenient for maintenance.

As shown in fig. 1, the side wall of the case is provided with a positive and negative line input 10, the positive and negative line input 10 is connected to the main contactor 1, and a precharge contactor 2 and a precharge resistor 3 are disposed adjacent to the main contactor 1. The positive and negative line input 10 of the utility model is located at the left upper side of the box body, and is connected with the main contactor 1, the main function of the utility model is to control and protect the whole loop system of the permanent magnet traction converter box, so the positive and negative line input 10 side is arranged at the adjacent position, and the pre-charging contactor 2 and the pre-charging resistor 3 are arranged at the adjacent position of the main contactor 1.

The power modules 5 are arranged in two groups, and the two groups of power modules 5 are respectively and symmetrically arranged in the first sealed cavity 30 and the third sealed cavity 40.

The filter reactor 4 is adjacent with main contactor 1 and power module 5 and sets up, is provided with two sets of three-phase output contactor subassemblies 6 adjacent to power module 5, and every three-phase output contactor of group 6 contains two three-phase output contactors, and every three-phase output contactor corresponds and sets up permanent-magnet motor to, set up and be provided with the magnetic ring in the front side of the UVW output 11 of box lateral wall.

The utility model is provided with the filter reactor 4 which is arranged at the rear side of the main contactor 1 and the front side of the power module 5 and is mainly used for effectively absorbing system harmonic waves and limiting short-circuit current during fault, thereby improving the system safety.

The utility model is provided with two groups of power modules 5 which are respectively and symmetrically distributed in the first sealing cavity and the third sealing cavity, and the symmetrical arrangement of the power modules 5 can be that the heat dissipation air quantity of each group of power modules is uniformly distributed, thereby meeting the heat dissipation requirement of the power modules and ensuring the stability of the function.

In the utility model, 2 groups of three-phase output contactor assemblies 6 are arranged behind a power module 5, 4 three-phase output contactors in each group correspond to 4 permanent magnet motors respectively, and the functions of protecting and isolating the permanent magnet motors are mainly realized.

In order to meet the requirement of electromagnetic compatibility, the front side of the UVW output 11 is provided with a magnetic ring.

According to the utility model, the spraying copper bar 14 is adopted to replace a cable to be connected with the common copper bar between the three-phase output contactor assembly 6 and the three-phase output current sensor assembly 7, the two assemblies cannot be wired due to a short distance, and a sufficient electrical gap needs to be reserved between the common copper bars, so that the defect that the wiring space occupies a large area exists, the rest parts of the spraying copper bar 14 except for the reserved wiring end are sprayed with insulating paint, and the insulation between the copper bars can be realized without reserving the electrical gap between the copper bars, so that the wiring is simpler and more convenient, and the structure is more compact.

The traction controller assembly 9 is arranged close to the control connector 12, the front side of the traction controller assembly is provided with the revolving frame 22, the revolving frame 22 is provided with the relays, the circuit breakers, the weak current terminal pieces and the like, the revolving frame 22 is provided with 3 hinges, the maximum angle of the revolving frame 22 can be opened by 95 degrees, the distance between the weak current device and the controller is shortened, the routing path of a control line is simplified, meanwhile, the space of a box body is fully utilized, the structural design is more compact, and the maintenance of the controller is not influenced.

As shown in fig. 2 and 3, the present invention provides a door assembly 13, a first bottom cover plate 24 and a second bottom cover plate 25 for easy maintenance of the devices. Each door assembly 13 is provided with 1-2 anti-drop pins to prevent the door assembly from falling out after the door lock fails, as shown in fig. 4.

Fig. 5 and 6 show schematic structural diagrams of a cooling air duct of the present invention, and the permanent magnet traction converter provided in the embodiment of the present invention further includes:

at least one air intake 16: the cooling air inlet 16 is arranged on the side wall of the box body 100 and the cooling air enters the box body;

the heat dissipation fins 19: the cooling air is arranged in the box body and passes through the radiating fins 19 from the air inlet 16;

and (3) cooling the fan 8: the cooling air is arranged in the box body and is blown out from the cooling fins 19 through the cooling fan 8;

at least one air outlet 17: and the cooling air is arranged on the side wall of the box body and flows out of the box body from the air outlet 17.

The filter screen is arranged at the air inlet, so that large-particle dust and sundries can be filtered, and the cleanness of the cooling air duct is kept. As shown in fig. 5, the power module 5 is respectively installed in the first sealed cavity and the third sealed cavity, the radiator fins 19 of the power module 5 are located in the left and right vertical air channels, cooling air enters the air collecting hood after passing through the radiator fins 19, is blown out by the cooling fan 8, then is blown out by the air outlet below the box body after passing through the middle gap of the filter reactor 4, and the whole process respectively completes heat dissipation of the power module 5 and the filter reactor 4. The cooling air duct is designed to be of a symmetrical structure, and the air inlets of the two groups of power modules are kept consistent, so that the heat dissipation air quantity of the two groups of power modules can be kept consistent, the respective heat dissipation requirements can be met, and the stability of performance can be guaranteed.

Compared with the prior art, the permanent magnet traction converter box mainly comprises a box body, a power module, a contactor assembly, a filter reactor, a fan assembly, a controller assembly, a three-phase output contactor assembly and the like.

The middle partition plate is arranged in the box body and divides the box body into two power module chambers, a three-phase contactor chamber and a ventilation chamber, the two power module chambers are symmetrically distributed on two sides of the ventilation chamber, and the three-phase contactor chamber is located on the other side of the ventilation chamber.

The positive and negative line input and the control connector are respectively arranged on the side wall of the power module cavity, and the main contactor is arranged at the position, close to the positive and negative line input, of the power module cavity and connected with the filter reactor and the two power modules to play a role in control and protection.

The filter reactor is arranged in the ventilation cavity and connected with the two power modules, so that system harmonic waves can be effectively absorbed, and short-circuit current is limited during fault.

The power module is arranged in a power module cavity and integrates two paths of inversion units, and the traction controller is arranged at the position, close to the control connector, of the power module cavity and connected with the power module to control the power module to drive the two permanent magnet motors.

Four three-phase output contactors are arranged behind the power module and respectively correspond to the 4 permanent magnet motors, and the functions of protecting and isolating the permanent magnet motors are mainly achieved.

The three-phase output contactor assembly and the three-phase output current sensor assembly are connected by the spraying copper bar, so that the problems that the two assemblies are close in distance, narrow in space and incapable of wiring are solved, wiring is simpler and more convenient, and the structure is more compact.

The front side of the traction controller assembly is provided with the revolving frame, the revolving frame is provided with the relay, the circuit breaker, the weak current terminal plate and the like, the revolving frame is provided with 3 hinges, the revolving frame can be opened to 95 degrees at most, the distance between the weak current device and the controller is shortened due to the design of the revolving frame, the routing path of a control line is simplified, meanwhile, the space of the box body is fully utilized, the maintenance area is increased, the structural design is more compact, and the maintenance of the controller is not influenced.

The door assembly, the first bottom cover plate and the second bottom cover plate are arranged, so that the maintenance of devices is facilitated, and the door assembly is provided with the anti-falling pin to prevent the door assembly from falling off after the door lock fails.

The positions where the radiator fins of the cavity of the power module are placed are connected with the air collecting cover and the ventilation cavity to form a cooling air channel together, and the cooling air channel is designed to be of a symmetrical structure, so that the consistency of the heat dissipation air quantity of the two groups of power modules is guaranteed.

The top of the power module cavity is provided with an air inlet, and an air inlet filter screen is arranged at the position of the air inlet.

The bottom of the ventilation cavity is provided with an air outlet.

The above description is for the purpose of describing particular embodiments of the present invention, and is not intended to limit the scope of the present invention, which is defined by the claims and their equivalents. It is noted that in the drawings and in the description, implementations not shown or described are all in a form known to those of ordinary skill in the art and are not described in detail. Furthermore, the above definitions of the various components and processes are not intended to be limited to the specific structures, shapes, or configurations shown in the examples.

Claims

1. A permanent magnet traction converter, comprising a housing and electrical components disposed in the housing, the housing comprising:

a clapboard: the partition plate is arranged inside the box body;

at least one cavity: the box body is divided into at least one cavity through the partition plate, and the at least one electrical component is arranged in the cavity;

2. The permanent magnet traction converter according to claim 1, wherein the box further comprises:

3. The permanent magnet traction converter according to claim 1, wherein the cavity comprises:

4. The permanent magnet traction converter according to claim 3, further comprising:

cooling fan: the cooling air is arranged in the box body, and the cooling air is blown out from the heat dissipation fins through the cooling fan;

5. The permanent magnet traction converter according to claim 4, wherein the three-phase output contactor assembly and the three-phase output current sensor assembly are connected by a sprayed copper bar.

6. The permanent magnet traction converter according to claim 3, wherein said turret is adjacently disposed to said traction controller assembly, said turret having disposed thereon a relay, a circuit breaker and a low current terminal plate.

7. A permanent magnet traction converter according to claim 3, characterized in that the side walls of the box are provided with positive and negative line inputs connected to the main contactor and that the pre-charging contactor and the pre-charging resistor are placed in proximity of the main contactor.

8. The permanent magnet traction converter according to claim 3, wherein said power modules are provided in two groups, and said two groups of power modules are symmetrically disposed in said first sealed cavity and said third sealed cavity, respectively.

9. The traction converter as claimed in claim 3, wherein the filter reactor is disposed adjacent to the main contactor and the power module, two sets of the three-phase output contactor assemblies are disposed adjacent to the power module, each set of the three-phase output contactor assemblies comprises two three-phase output contactors, each of the three-phase output contactors is provided with a permanent magnet motor, and a magnetic ring is disposed at a front side of the UVW output of the side wall of the case.

10. The permanent magnet traction converter according to claim 2, wherein at least one anti-slip pin is provided on each door assembly.