CN219802952U

CN219802952U - Three-level rectification power supply based on LCL filtering

Info

Publication number: CN219802952U
Application number: CN202321075691.2U
Authority: CN
Inventors: 黄军
Original assignee: Nanjing Langchi Ruitai Electronic Information Technology Co ltd
Current assignee: Nanjing Langchi Ruitai Electronic Information Technology Co ltd
Priority date: 2023-05-08
Filing date: 2023-05-08
Publication date: 2023-10-03
Anticipated expiration: 2033-05-08

Abstract

The utility model relates to a three-level rectifying power supply based on LCL filtering, which comprises a shell, wherein a plurality of radiating holes are formed in the front surface of the shell, a fixing assembly is arranged in the shell, a dust screen is fixed on the front surface of an inner cavity of the shell through the fixing assembly, a mounting assembly is arranged on the shell, and a top plate is fixed on the top surface of the shell through the mounting assembly. This three-level rectification power supply based on LCL filtering, when using, make the inside air of casing circulate through the louvre, and then reach certain radiating effect, can effectively filter the dust in the air through the dust screen, when the dust screen needs the clearance, can dismantle it fast through fixed subassembly, change the clearance of facilitating for the dust screen, can dismantle the roof at casing top through the installation component, on the one hand be the maintenance of casing inner circuit board convenient, on the one hand be the dismantlement of dust screen convenient, it is more practical.

Description

Three-level rectification power supply based on LCL filtering

Technical Field

The utility model relates to the technical field of three-level rectification power supplies, in particular to a three-level rectification power supply based on LCL filtering.

Background

The PWM rectifying power supply is a high power factor rectifying power supply, which can realize that the current of the ac side of the power supply is close to a sine wave by applying proper PWM control to a rectifying switching device, and the power factor of the system is close to 1, so that more attention is paid.

For example, chinese patent (bulletin number: CN 213637529U) discloses a diode rectifying switch power supply, which comprises a shell, wherein the shell comprises a bottom plate, a frame and side plates, the frame comprises a top plate and upright posts arranged at four corners of the top plate, the bottom of the upright posts is fixedly connected with the bottom plate, the edges of the side plates are connected with the upright posts, the outer side surfaces of the side plates are outwards protruded, a plurality of reinforcing ribs are arranged on the inner side surfaces of the side plates, and a plurality of heat dissipation holes are formed in the side plates; the inner side of the side plate is provided with a waterproof plate, the top of the waterproof plate is fixedly connected with the top plate, a plurality of ventilation through holes which are obliquely arranged are formed in the waterproof plate, one end of each ventilation through hole, which is positioned outside the waterproof plate, is lower than one end, which is positioned inside the waterproof plate, of the waterproof plate, the inner side of the waterproof plate is provided with a dust screen, and the dust screen is fixedly connected with the inner side of the waterproof plate in a bonding mode; the anti-pressing performance and the overall strength of the side plate are improved through the outward concave structure of the side plate and the reinforcing ribs on the inner side of the side plate, and the strength reduction and collapse of the side plate caused by the heat dissipation holes are avoided; meanwhile, waterproof and dustproof are carried out by arranging a waterproof plate and a dustproof net on the inner side of the side plate.

However, the above-mentioned search patent still has a bit of shortages, its dust screen is located inside the frame, when gathering more dust on the dust screen and need clear up, need dismantle curb plate and frame earlier, dismantle the washing to the dust screen again, curb plate, frame, dust screen are all fixed through a plurality of screws, dismantle inconveniently, and also appear leaking the problem of twisting the screw easily when the installation, use and have certain inconvenience, so put forward a three-level rectification power supply based on LCL filtering in order to solve above-mentioned problem.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a three-level rectification power supply based on LCL filtering, which has the advantages of being convenient for cleaning a dust screen, avoiding influencing ventilation and heat dissipation efficiency and the like, and solves the problem that the dust screen is inconvenient to detach for cleaning when the patent is searched.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a three-level rectification power supply based on LCL filtering, includes the casing, a plurality of louvres have been seted up in the front of casing, be equipped with fixed subassembly in the casing, the front of casing inner chamber is fixed with the dust screen through fixed subassembly, be equipped with the installation component on the casing, the top surface of casing is fixed with the roof through the installation component.

The fixed subassembly includes two spouts of seting up on the casing internal bottom wall, sliding connection has the slider in the spout, the back of slider is fixed with first spring, the top surface of slider is fixed with the butt board, the front of butt board is fixed with the locating piece, two constant head tanks that are used for supplying the locating piece grafting have been seted up to the back of dust screen and are close to bottom department.

Further, the shape of casing is the cuboid that inside cavity and top surface were absent, the back of casing is fixed with the panel, the back of panel is fixed with two handles.

Further, the radiating holes are square holes, a plurality of radiating holes are distributed in a rectangular array at equal intervals, the dustproof net is positioned right behind the radiating holes, the sliding grooves are T-shaped grooves, and the sliding blocks are T-shaped blocks.

Further, the positioning grooves are in clearance fit with the positioning blocks, and the two positioning grooves are respectively close to the left side and the right side of the bottom surface of the dust screen.

Further, the installation component is including rotating the connecting rod of connecting between the both sides inner wall and being close to right side department around the casing, the slot has been seted up in the left side of connecting rod, peg graft in the slot on the right side of roof, round slot has been seted up in the left side wall of casing, the left side of casing is equipped with the inserted bar that the level runs through round slot and with casing sliding connection, just be located round slot on the periphery wall of inserted bar and be fixed with the compression board, just be located round slot endotheca on the periphery wall of inserted bar and be equipped with the second spring, the spacing groove has been seted up in the left side of roof.

Further, roof and slot clearance fit, inserted bar and spacing groove clearance fit, offer on the left side wall of casing with circular slot intercommunication, and be used for supplying the guiding hole that inserted bar level runs through, the second spring is located the left side of compression board.

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

this three-level rectification power supply based on LCL filtering, when using, make the inside air of casing circulate through the louvre, and then reach certain radiating effect, can effectively filter the dust in the air through the dust screen, when the dust screen needs the clearance, can dismantle it fast through fixed subassembly, change the clearance of facilitating for the dust screen, can dismantle the roof at casing top through the installation component, on the one hand be the maintenance of casing inner circuit board convenient, on the one hand be the dismantlement of dust screen convenient, it is more practical.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a side view of the securing assembly of the present utility model;

fig. 3 is a schematic front view of the mounting assembly of the present utility model.

In the figure: 1 shell, 2 louvres, 3 fixed components, 301 sliding chute, 302 sliding block, 303 first spring, 304 abutting plate, 305 locating block, 306 locating slot, 4 dust screen, 5 installation component, 501 connecting rod, 502 slot, 503 circular slot, 504 inserted link, 505 compression plate, 506 second spring, 507 spacing slot, 6 roof.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

Referring to fig. 1-2, the three-level rectification power supply based on LCL filtering in this embodiment includes a housing 1, a plurality of heat dissipation holes 2 are provided on the front of the housing 1, the heat dissipation holes 2 are square holes, the heat dissipation holes 2 are distributed in rectangular array equidistance, a fixing component 3 is provided in the housing 1, the front of the inner cavity of the housing 1 is fixed with a dust screen 4 through the fixing component 3, the dust screen 4 is located right behind the heat dissipation holes 2, when in use, air in the housing 1 circulates through the heat dissipation holes 2, and then a certain heat dissipation effect is achieved, dust in the air can be effectively filtered through the dust screen 4, when the dust screen 4 needs to be cleaned, the dust screen 4 can be quickly detached through the fixing component 3, the cleaning and replacement of the dust screen 4 are facilitated, a mounting component 5 is provided on the housing 1, a top plate 6 is fixed on the top surface of the housing 1 through the mounting component 5, on the one hand, the convenience is provided for the disassembly of a circuit board inside the housing 1, on the other hand, the convenience is provided for the disassembly of the dust screen 4, and the dust screen 4 is more practical.

It should be noted that, the circuit board is fixed on the inner bottom wall of the shell 1, the control circuit mainly comprises a DSP control chip, a sampling conditioning circuit, a PWM driving circuit, an algorithm circuit and a protection circuit based on DSP design, the three-phase voltage is sampled in real time by a voltage sensor, the three-phase current is transmitted to the control circuit, the main control adopts a proportional integral and proportional resonance algorithm to control the output voltage and current, the PWM control signal is transmitted to the power switch device through a flat cable, so as to achieve the aims of stabilizing the output voltage, inputting the alternating-current side waveform to solve sine, and the power factor is close to 1.

The fixing assembly 3 comprises two sliding grooves 301 formed in the inner bottom wall of the shell 1, a sliding block 302 is connected in a sliding manner in the sliding grooves 301, an abutting plate 304 is fixed on the top surface of the sliding block 302, a positioning block 305 is fixed on the front surface of the abutting plate 304, two positioning grooves 306 for the positioning block 305 to be inserted are formed in the position, close to the bottom, of the back surface of the dust screen 4, when the dust screen 4 needs to be cleaned, the abutting plate 304 is slid backwards, the positioning block 305 is driven to be separated from the positioning grooves 306, the dust screen 4 can be directly taken out for cleaning and replacement, a first spring 303 is fixed on the back surface of the sliding block 302, after the dust screen 4 is cleaned, the dust screen 4 is put back, the sliding block 302 is driven to move backwards to press the first spring 303 due to the fact that the abutting plate 304 slides backwards, at the moment, the abutting plate 304 is released, the sliding block 302 is pushed forwards by the first spring 303 is further driven to move forwards, the positioning block 305 is inserted into the positioning grooves 306, and the dust screen 4 is enabled to be in contact with the front surface of the shell 1, and installation is completed.

The shape of casing 1 is the cuboid that inside cavity and top surface were absent, and the back of casing 1 is fixed with the panel, and the back of panel is fixed with two handles.

The back of the panel is fixed with a debugging interface and a start button electrically connected with the circuit board, and the front of the casing 1 is fixed with an ac input interface, a communication interface and a dc output interface electrically connected with the circuit board.

The sliding chute 301 is a T-shaped chute, the sliding block 302 is a T-shaped block, the positioning groove 306 is in clearance fit with the positioning block 305, and the two positioning grooves 306 are respectively close to the left side and the right side of the bottom surface of the dust screen 4.

Referring to fig. 3, in the present embodiment, the mounting assembly 5 includes a connecting rod 501 rotatably connected between inner walls of front and rear sides of the housing 1 and near to the right side, a slot 502 is formed on the left side of the connecting rod 501, the right side of the top plate 6 is inserted into the slot 502, a circular slot 503 is formed in the left side of the housing 1, an inserting rod 504 horizontally penetrating the circular slot 503 and slidably connected with the housing 1 is disposed on the left side of the housing 1, a compression plate 505 is fixed on the outer peripheral wall of the inserting rod 504 and located on the circular slot 503, a second spring 506 is sleeved on the outer peripheral wall of the inserting rod 504 and located on the circular slot 503, a limit groove 507 is formed on the left side of the top plate 6, when the top plate 6 needs to be disassembled, the inserting rod 504 is pulled to the left side of the limit groove 507, the top plate 6 is turned over to drive the connecting rod 501 to rotate, when the inserting rod 502 is turned over by a certain angle, the second spring 506 is driven to compress the second spring 506, and when the top plate 6 needs to be mounted, the second spring 506 is pushed into the limit groove 507.

The top plate 6 is in clearance fit with the slot 502, the inserting rod 504 is in clearance fit with the limiting groove 507, a guide hole which is communicated with the circular groove 503 and is used for horizontally penetrating the inserting rod 504 is formed in the left side wall of the shell 1, and the second spring 506 is located on the left side of the compression plate 505.

The working principle of the embodiment is as follows:

when the dust screen 4 needs to be cleaned, the abutting plate 304 is slid backwards, so that the abutting plate 304 drives the positioning block 305 to be separated from the positioning groove 306, at the moment, the dust screen 4 can be directly taken out for cleaning and replacement, after cleaning is finished, the dust screen 4 is put back, the abutting plate 304 is released, the first spring 303 pushes the sliding block 302 to slide forwards because the sliding block 302 is driven to move backwards to squeeze the first spring 303 when the abutting plate 304 slides backwards, and the abutting plate 304 is further driven to move forwards, so that the positioning block 305 is inserted into the positioning groove 306, and the dust screen 4 is abutted to the front surface of the inner cavity of the shell 1, so that installation is finished.

When the top plate 6 needs to be disassembled, the inserting rod 504 is pulled to the left side, so that the inserting rod 504 is separated from the limiting groove 507, the top plate 6 is turned over, the connecting rod 501 is driven to rotate, after a certain angle is turned over, the top plate 6 can be pulled out of the slot 502, when the inserting rod 504 is pulled, the compressing plate 505 is driven to squeeze the second spring 506, and when the top plate 6 needs to be installed, the operation is reversed, so that the second spring 506 pushes the inserting rod 504 to be inserted into the limiting groove 507.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Three-level rectification power supply based on LCL filtering, including casing (1), its characterized in that: the novel anti-dust device is characterized in that a plurality of radiating holes (2) are formed in the front face of the shell (1), a fixing assembly (3) is arranged in the shell (1), a dust screen (4) is fixed on the front face of an inner cavity of the shell (1) through the fixing assembly (3), a mounting assembly (5) is arranged on the shell (1), and a top plate (6) is fixed on the top face of the shell (1) through the mounting assembly (5);

the fixed subassembly (3) is including two spouts (301) of seting up on the diapire in casing (1), sliding connection has slider (302) in spout (301), the back of slider (302) is fixed with first spring (303), the top surface of slider (302) is fixed with butt board (304), the front of butt board (304) is fixed with locating piece (305), two constant head tanks (306) that are used for supplying locating piece (305) to peg graft are seted up at the back of dust screen (4) and are close to bottom department.

2. A three-level rectified power supply based on LCL filtering according to claim 1, wherein: the shape of casing (1) is the cuboid that inside cavity and top surface were absent, the back of casing (1) is fixed with the panel, the back of panel is fixed with two handles.

3. A three-level rectified power supply based on LCL filtering according to claim 1, wherein: the heat dissipation holes (2) are square holes, a plurality of heat dissipation holes (2) are distributed at equal intervals in a rectangular array, the dust screen (4) is positioned right behind the heat dissipation holes (2), the sliding groove (301) is a T-shaped groove, and the sliding block (302) is a T-shaped block.

4. A three-level rectified power supply based on LCL filtering according to claim 1, wherein: the positioning grooves (306) are in clearance fit with the positioning blocks (305), and the two positioning grooves (306) are respectively close to the left side and the right side of the bottom surface of the dustproof net (4).

5. A three-level rectified power supply based on LCL filtering according to claim 1, wherein: the installation component (5) is including rotating connecting rod (501) between the both sides inner wall and be close to right side department around casing (1), slot (502) have been seted up in the left side of connecting rod (501), peg graft in slot (502) on the right side of roof (6), round slot (503) have been seted up in the left side wall of casing (1), the left side of casing (1) is equipped with horizontal inserted bar (504) that runs through round slot (503) and with casing (1) sliding connection, be fixed with compression board (505) on the periphery wall of inserted bar (504) and lie in round slot (503), second spring (506) are equipped with in the periphery wall of inserted bar (504) and lie in round slot (503), spacing groove (507) have been seted up in the left side of roof (6).

6. The three-level rectified power supply based on LCL filtering according to claim 5, wherein: the top plate (6) is in clearance fit with the slot (502), the inserting rod (504) is in clearance fit with the limiting groove (507), a guide hole which is communicated with the circular groove (503) and used for allowing the inserting rod (504) to horizontally penetrate is formed in the left side wall of the shell (1), and the second spring (506) is located on the left side of the compression plate (505).