690V basic rectifier cabinet

Abstract

The utility model discloses a 690V basic rectifier cabinet, and relates to the technical field of alternating current transmission. Bakelite plates are respectively fixed on a middle upright post up and down through bolts; a wire inlet copper bar is fixed on the rear side of the bakelite plate below, and a wiring hole is reserved on the wire inlet copper bar; the inlet wire reactor is fixed on the inner bottom plate of the cabinet body through the mounting channel steel; the upper port wiring end of the inlet wire reactor is connected with a switch lower port row; the other end of the wire inlet copper bar is connected to a lower port wiring end of the wire inlet reactor; the air circuit breaker is fixed on the middle upright post through the mounting channel steel and the mounting bracket; the mounting bracket is of an L-shaped structure; on the basis of meeting the function of a traditional rectifying unit, an integrated installed and installed cabinet type structure is realized, the application is more convenient, the use is more flexible, and the requirement of a field process can be better met; external interfaces are few, only incoming and outgoing line interfaces control power interfaces, and operation is simple and easy; due to the adoption of the structural form of installing a machine and installing a cabinet, the occupied space can be reduced, and field installation is also facilitated.

Description

Technical Field

[0001] This utility model relates to the field of AC drive technology, specifically to a 690V basic rectifier cabinet. Background Technology

[0002] As we all know, there are many types of common AC speed control systems, and the brands are not all the same. The most common ones on the market are basically divided into two categories: one is a single-unit frequency converter, which integrates rectification and inversion in one device, and only one device can drive a motor; the other consists of one rectifier unit plus several inverter units, with each inverter unit driving a motor.

[0003] In use, these two methods each have their own advantages and disadvantages: In the single-unit frequency conversion method, one device corresponds to one motor, which is convenient and flexible to control, but the disadvantage is that the cost is high; in the rectification plus inverter method, one rectifier device can connect several inverter units to the DC bus, which can drive multiple motors. This can better take advantage of centralized rectification and reduce costs, but the disadvantage is that it occupies a lot of space and is inconvenient for on-site installation. Therefore, a 690V basic rectifier cabinet is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by proposing a 690V basic rectifier cabinet to solve the aforementioned problems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a cabinet and a standard rectifier unit module; the standard rectifier unit module is fixed inside the cabinet; the standard rectifier unit module consists of an inlet bus, power diodes, heat sinks, DC bus, internal DC capacitors, outlet bus, control board, cooling fan and outer shell; a central column is fixed inside the cabinet;

[0006] It also includes:

[0007] The bakelite board consists of three boards, which are fixed to the central column by bolts at the top and bottom respectively; a copper busbar for cable entry is fixed to the rear side of the lower bakelite board, and a wiring hole is provided on the copper busbar for cable entry.

[0008] The incoming line reactor is fixed to the inner bottom plate of the cabinet by mounting channel steel; the upper terminal of the incoming line reactor is connected to the lower terminal of the switch; the other end of the incoming copper busbar is connected to the lower terminal of the incoming line reactor.

[0009] An air circuit breaker is fixed to a central column by mounting channel steel and mounting brackets; the mounting brackets are "L" shaped; the air circuit breaker is connected to the upper circuit breaker via a circuit breaker interface transition bar, and the upper circuit breaker is fixed to the middle bakelite board; the incoming line reactor is connected to the lower circuit breaker via a circuit breaker interface transition bar.

[0010] The main body of the adapter is fixed in the middle to the bakelite board above; the main body of the adapter is connected to the inlet of the standard rectifier unit module;

[0011] The fast-acting fuses are three in number, with their lower interfaces fixed to the upper end of the circuit breaker's upper port bar and their upper ports fixed to the lower end of the transfer busbar body; the three current transformers are clamped and fixed to the transfer busbar body by clamps.

[0012] The DC output busbar consists of two units, which are respectively led out from the positive and negative output terminals of the standard rectifier unit module and extend upward to the horizontal busbar clamp position.

[0013] Preferably, the upper end of the main body of the transition busbar is connected to the A-phase transition busbar, the B-phase transition busbar, and the C-phase transition busbar, and the main body of the transition busbar is connected to the input terminal of the standard rectifier unit module through the A-phase transition busbar, the B-phase transition busbar, and the C-phase transition busbar.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a 690V basic rectifier cabinet, which, while meeting the functions of traditional rectifier units, achieves an integrated, cabinet-style structure, making it more convenient to apply, more flexible to use, and better able to adapt to the requirements of on-site processes; it has fewer external interfaces, only incoming and outgoing line interfaces and power control interfaces, making it simple and easy to operate; this cabinet-style structure can reduce space occupation and facilitate on-site installation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 yes Figure 1 The left view.

[0018] Figure 3 yes Figure 1 Rear view.

[0019] Explanation of reference numerals in the attached figures:

[0020] Cabinet 1, Standard rectifier unit module 2, Central column 3, Phenolic board 4, Incoming copper busbar 5, Incoming reactor 6, Switch lower port 7, Air circuit breaker 8, Mounting bracket 9, Circuit breaker interface transition port 10, Circuit breaker upper port 11, Adapter port body 12, A-phase adapter port 13, B-phase adapter port 14, C-phase adapter port 15, Fast-acting fuse 16, Current transformer 17, DC output port 18, DC busbar 19, Horizontal busbar clamp 20. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Please see Figure 1-3 This embodiment includes a cabinet 1 and a standard rectifier unit module 2; the standard rectifier unit module 2 is fixed inside the cabinet 1; the standard rectifier unit module 2 consists of an inlet bus, a power diode, a heat sink, a DC bus 19, an internal DC capacitor, an outlet bus, a control board, a cooling fan, and a housing; a central column 3 is fixed inside the cabinet 1;

[0023] It also includes:

[0024] The number of the three plywood boards 4 is three, and they are respectively fixed to the central column 3 by bolts at the top and bottom; the lower plywood board 4 has a copper busbar 5 fixed to the rear side, and the copper busbar 5 has a wiring hole as the port for AC incoming line.

[0025] The incoming line reactor 6 is fixed to the inner bottom plate of the cabinet 1 by mounting channel steel; the upper terminal of the incoming line reactor 6 is connected to the lower terminal of the switch 7; the other end of the incoming line copper busbar 5 is connected to the lower terminal of the incoming line reactor 6.

[0026] Air circuit breaker 8 is fixed to the central column 3 by mounting channel steel and mounting bracket 9; mounting bracket 9 has an "L" shaped structure; air circuit breaker 8 is connected to the upper circuit breaker row 11 through circuit breaker interface transition row 10, and the upper circuit breaker row 11 is fixed to the middle bakelite board 4; incoming line reactor 6 is connected to the lower end of air circuit breaker 8 through circuit breaker interface transition row 10.

[0027] The main body 12 of the adapter is fixed in the middle to the bakelite board 4 above. The upper end of the main body 12 is connected to the A-phase adapter 13, the B-phase adapter 14 and the C-phase adapter 15 respectively. The main body 12 of the adapter is connected to the input end of the standard rectifier unit module 2 through the A-phase adapter 13, the B-phase adapter 14 and the C-phase adapter 15.

[0028] Three fast-acting fuses 16 are provided, with their lower interfaces fixed to the upper end of the circuit breaker upper port 11 and their upper ports fixed to the lower end of the transfer bus body 12. Three current transformers 17 are clamped and fixed to the transfer bus body 12 by clamps for detecting AC current.

[0029] There are two DC output busbars 18, which are respectively led out from the positive and negative output terminals of the standard rectifier unit module 2. The DC output busbars 18 extend upward to the horizontal bus clamp 20 position to connect with the DC bus 19.

[0030] The working principle of this specific implementation is as follows: Before use, the control power is turned on, so that the control power of the standard rectifier unit module 2 is turned on and the control system starts to work. Then, the three-phase AC power of the main circuit is sent to the incoming copper busbar 5. The air circuit breaker 8 is operated to close the main contacts. Then, the three-phase AC power is sent to the incoming end of the standard rectifier unit module 2 through the incoming copper busbar 5, the incoming reactor 6, the switch lower port 7, the air circuit breaker 8, the circuit breaker interface transition port 10, the circuit breaker upper port 11, the fast fuse 16, the main body of the transfer busbar 12, the A-phase transfer busbar 13, the B-phase transfer busbar 14, and the C-phase transfer busbar 15. After the internal regulation of the standard rectifier unit module 2, the three-phase AC power is converted into DC power and sent to the DC busbar 19 on the top of the cabinet through the DC output busbar 18, thereby realizing the generation and transmission of power. The lower inverter block can obtain power from the DC busbar 19 to drive the motor.

[0031] The beneficial effects of this specific embodiment after adopting the above structure are as follows:

[0032] 1. While fulfilling the functions of traditional rectifier units, it achieves an integrated, cabinet-style structure, making it more convenient to apply, more flexible to use, and better able to adapt to the requirements of on-site processes;

[0033] 2. It has few external interfaces, only incoming and outgoing line interfaces and a power interface, making it simple and easy to operate;

[0034] 3. This cabinet-style structure reduces space occupation and facilitates on-site installation.

[0035] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A 690V basic rectifier cabinet, comprising a cabinet (1) and a standard rectifier unit module (2); the standard rectifier unit module (2) is fixed inside the cabinet (1); the standard rectifier unit module (2) consists of an input bus, power diodes, heat sinks, DC bus (19), internal DC capacitors, output bus, control board, cooling fan and outer shell; a central column (3) is fixed inside the cabinet (1); Its features are, It also includes: The number of the three plywood boards (4) is three, and they are fixed to the central column (3) by bolts at the top and bottom respectively; the lower plywood board (4) is fixed with a copper busbar (5) on the back side, and the copper busbar (5) has a wiring hole on it; The incoming line reactor (6) is fixed to the inner bottom plate of the cabinet (1) by means of a mounting channel steel; the upper terminal of the incoming line reactor (6) is connected to the lower terminal of the switch (7); the other end of the incoming line copper busbar (5) is connected to the lower terminal of the incoming line reactor (6); An air circuit breaker (8) is fixed to a central column (3) by means of a mounting channel steel and a mounting bracket (9); the mounting bracket (9) is an "L" shaped structure; the air circuit breaker (8) is connected to the upper circuit breaker (11) through a circuit breaker interface transition bar (10), and the upper circuit breaker (11) is fixed to a middle bakelite board (4); the incoming line reactor (6) is connected to the lower end of the air circuit breaker (8) through the circuit breaker interface transition bar (10); The main body of the adapter (12) is fixed in the middle on the upper bakelite board (4); the main body of the adapter (12) is connected to the inlet of the standard rectifier unit module (2); Three fast-acting fuses (16) are provided, with their lower interfaces fixed to the upper end of the circuit breaker upper port (11) and their upper ports fixed to the lower end of the transfer bus body (12). Three current transformers (17) are clamped and fixed to the transfer bus body (12) by clamps. The number of DC output bars (18) is two, and they are respectively led out from the positive and negative output terminals of the standard rectifier unit module (2). The DC output bars (18) extend upward to the horizontal bus clamp (20).

2. A 690V basic rectifier cabinet according to claim 1, characterized in that: The upper end of the main body of the transition busbar (12) is connected to the A-phase transition busbar (13), the B-phase transition busbar (14), and the C-phase transition busbar (15). The main body of the transition busbar (12) is connected to the input end of the standard rectifier unit module (2) through the A-phase transition busbar (13), the B-phase transition busbar (14), and the C-phase transition busbar (15).

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