Compact power unit module for rail transit bidirectional converter

Abstract

The utility model discloses a compact power unit module for a rail transit bidirectional converter, which belongs to the technical field of bidirectional converters and comprises a unit shell, a left side plate, a right side plate, a first alternating current incoming and outgoing line copper bar and a second alternating current incoming and outgoing line copper bar. A first laminated bus is arranged at the bottom of the first alternating current incoming and outgoing line copper bar, a first driving plate is arranged at the bottom of the first laminated bus, a first insulated gate bipolar transistor is arranged on the first driving plate, a water cooling plate is arranged on the lower portion of the unit shell, and a second circuit board is arranged on the lower portion of the water cooling plate. The plastic clasps are installed on the left side plate and the right side plate of the unit shell and are convenient to carry, the handle is installed on the front portion of the unit shell and is convenient to disassemble and pull, the structural layout is reasonably designed, the space is compressed, and the unit is smaller and lighter and convenient to transport and install.

Description

Technical Field

[0001] This utility model relates to the field of bidirectional converter technology, specifically a compact power unit module for a bidirectional converter in rail transit. Background Technology

[0002] Currently, most bidirectional converter cabinets used in rail transit systems employ diode rectifier units for power supply. This method has the following drawbacks: 1. Large DC output voltage fluctuations; 2. Inability to handle regenerative braking energy; 3. Uncontrollable system power factor. Our company has developed a compact, modular, fully controllable bidirectional traction power supply converter product to completely replace diode rectifier units. This solution offers the following advantages: natural regenerative energy feedback for energy saving; DC grid voltage stabilization function, completely resolving a series of problems caused by DC grid voltage fluctuations; automatic reactive power detection and compensation, achieving investment savings, reduced energy consumption, improved power supply environment, and reduced rail potential; excellent AC / DC power supply quality; and a new generation of traction power supply equipment with networked and intelligent operation characteristics.

[0003] To this end, we propose a compact power unit module for bidirectional converters in rail transit. Utility Model Content

[0004] The purpose of this invention is to provide a compact power unit module for bidirectional converters in rail transit, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a compact power unit module for a bidirectional converter in rail transit, comprising a unit housing, a left side plate, a right side plate, an AC input / output copper busbar one, and an AC input / output copper busbar two. An LEM sensor is disposed on the upper part of the unit housing. A stacked busbar one is disposed at the bottom of the AC input / output copper busbar one, and a drive board one is disposed at the bottom of the stacked busbar one. An insulated gate bipolar transistor one is disposed on the drive board one. A water-cooled plate is disposed at the lower part of the unit housing, and a circuit board one is disposed below the water-cooled plate. A capacitor assembly one is disposed on the upper right side inside the unit housing. Plastic handles are disposed on the surfaces of both the left and right side plates. An insulated gate bipolar transistor two is disposed on the circuit board one, and a stacked busbar two is disposed below the AC input / output copper busbar two.

[0006] Furthermore, a second drive plate is provided on the lower left side of the second stacked busbar, and a third drive plate and a fourth drive plate are provided on the lower right side of the second stacked busbar.

[0007] Furthermore, a second circuit board is provided on the upper left side inside the unit housing, and a second capacitor assembly is provided on the lower part inside the unit housing.

[0008] Furthermore, a handle is provided at the bottom of the unit housing, and two sets of handles are provided.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This unit module is a compact unit module with a water-cooled pipe heat sink, which has a good heat dissipation effect. The double-sided installation structure makes more efficient use of space, reduces the module volume and saves costs. The self-made low-inductance vulcanized laminated non-inductive busbar mainly serves to connect the main circuit topology and insulate the main circuit. It also has the functions of overvoltage suppression and reducing the volume of the main circuit. Sufficient space is left for the circuit board, LEM sensor, capacitor assembly and the front of the unit housing for full heat dissipation. Plastic handles are installed on the left and right side panels of the unit housing for easy handling. The handle is installed on the front of the unit housing for easy disassembly and pulling. The reasonable structural layout compresses space, making the unit smaller and lighter, which is convenient for transportation and installation. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the upright three-dimensional structure of this utility model;

[0011] Figure 2 This is a top view of the present invention.

[0012] Figure 3 This is a schematic diagram of the reverse-viewing three-dimensional structure of this utility model;

[0013] Figure 4 This is a reverse top view of the structure of this utility model.

[0014] In the diagram: 1. Unit housing; 101. Circuit board 2; 102. Capacitor assembly 2; 103. Handle; 2. Left side panel; 3. Right side panel; 4. LEM sensor; 5. AC input / output copper busbar 1; 6. Multilayer busbar 1; 7. Driver board 1; 8. Insulated gate bipolar transistor 1; 9. Water-cooled plate; 10. Circuit board 1; 11. Capacitor assembly 1; 12. Plastic handle; 13. Insulated gate bipolar transistor 2; 14. AC input / output copper busbar 2; 15. Multilayer busbar 2; 16. Driver board 2; 17. Driver board 3; 18. Driver board 4. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4This utility model provides a technical solution: a compact power unit module for a bidirectional converter in rail transit, including a unit housing 1, a left side plate 2, a right side plate 3, an AC input / output copper busbar 5 and an AC input / output copper busbar 2 14. An LEM sensor 4 is installed on the upper part of the unit housing 1. A stacked busbar 6 is installed at the bottom of the AC input / output copper busbar 5. A drive board 7 is installed at the bottom of the stacked busbar 6. An insulated gate bipolar transistor 8 is installed on the drive board 7. A water-cooled plate 9 is installed at the lower part of the unit housing 1. The unit is equipped with a circuit board 10. A capacitor assembly 11 is located on the upper right side inside the unit housing 1. Plastic handles 12 are located on the surfaces of both the left and right side panels 2 and 3. An insulated gate bipolar transistor 13 is mounted on the circuit board 10. A multilayer busbar 15 is located below the AC input / output copper busbar 14. The compact unit module uses a water-cooled pipe heatsink for good heat dissipation. The double-sided mounting structure makes more efficient use of space, reducing module size and saving costs. A self-made low-inductance, sulfurized multilayer non-inductive busbar is used, primarily for the main circuit. The topology connection and main circuit insulation also serve to suppress overvoltage and reduce the size of the main circuit. Sufficient space is provided for the circuit board, LEM sensor 4, capacitor assembly, and the front of the unit housing 1 for adequate heat dissipation. Plastic buckles 12 are installed on the left side plate 2 and right side plate 3 of the unit housing 1 for easy handling, and handles 103 are installed on the front of the unit housing 1 for easy disassembly and pulling. The reasonable structural layout compresses space, making the unit smaller and lighter, facilitating transportation and installation. The compact unit module constitutes the modular equipment of the high-power fully controlled traction power supply energy feedback device, with precise connection, small size, light weight, strong versatility, quick and simple replacement, and small footprint, saving space. It adopts a diode clamping three-level topology structure with smooth waveform, low harmonic content, low inductance sulfurized laminated busbar, excellent insulation performance, and low circuit stray inductance, effectively suppressing turn-off overvoltage, improving the life of power devices, reducing losses, and improving equipment stability. In terms of output characteristics, it can form a stable DC operating voltage, thereby avoiding problems caused by DC voltage fluctuations.

[0017] Reference embodiment: A drive board 2 16 is provided on the lower left side of the stacked bus 2 15, and a drive board 3 17 and a drive board 4 18 are provided on the lower right side of the stacked bus 2 15.

[0018] Reference embodiment: A circuit board 2 101 is provided on the upper left side inside the unit housing 1, and a capacitor assembly 2 102 is provided on the lower part inside the unit housing 1.

[0019] Reference embodiment: A handle 103 is provided at the bottom of the unit housing 1. Two sets of handles 103 are provided. The handles are installed on the unit housing 1 for easy disassembly and pulling.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact power unit module for a bidirectional converter in rail transit, comprising a unit housing (1), a left side plate (2), a right side plate (3), an AC input / output copper busbar one (5), and an AC input / output copper busbar two (14), characterized in that: The unit housing (1) is provided with an LEM sensor (4) on the upper part, the AC input / output copper busbar (5) is provided with a stacked busbar (6) at the bottom, the stacked busbar (6) is provided with a drive board (7) at the bottom, the drive board (7) is provided with an insulated gate bipolar transistor (8), the unit housing (1) is provided with a water-cooled plate (9) at the lower part, the water-cooled plate (9) is provided with a circuit board (10) at the lower part, the unit housing (1) is provided with a capacitor assembly (11) on the upper right side, the left side plate (2) and the right side plate (3) are provided with plastic handles (12), the circuit board (10) is provided with an insulated gate bipolar transistor (13), and the stacked busbar (15) is provided below the AC input / output copper busbar (14).

2. A compact power unit module for a bidirectional converter in rail transit according to claim 1, characterized in that: A drive plate 2 (16) is provided on the lower left side of the stacked busbar 2 (15), and a drive plate 3 (17) and a drive plate 4 (18) are provided on the lower right side of the stacked busbar 2 (15).

3. A compact power unit module for a bidirectional converter in rail transit according to claim 1, characterized in that: A circuit board 2 (101) is provided on the upper left side inside the unit housing (1), and a capacitor assembly 2 (102) is provided on the lower part inside the unit housing (1).

4. A compact power unit module for a bidirectional converter in rail transit according to claim 1, characterized in that: The unit housing (1) is provided with a handle (103) at the bottom, and there are two sets of handles (103).

Images