CN112054705B - Midpoint clamping type three-level inverter with dustproof and moistureproof structure - Google Patents
Midpoint clamping type three-level inverter with dustproof and moistureproof structure Download PDFInfo
- Publication number
- CN112054705B CN112054705B CN202010993935.XA CN202010993935A CN112054705B CN 112054705 B CN112054705 B CN 112054705B CN 202010993935 A CN202010993935 A CN 202010993935A CN 112054705 B CN112054705 B CN 112054705B
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- protective cover
- shell
- level inverter
- dustproof
- neutral point
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/487—Neutral point clamped inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0247—Electrical details of casings, e.g. terminals, passages for cables or wiring
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/03—Covers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
Abstract
The neutral point clamping type three-level inverter with the dustproof and moistureproof structure comprises an inverter body, wherein a plurality of interfaces are arranged on the inverter body, a shell is arranged on the outer side of the inverter body, a protective cover is arranged on the front end surface of the shell, a front baffle is fixedly connected to the front end surface of the shell and positioned at the bottom of the shell, the protective cover is inserted into the front baffle, and two limiting slide blocks are fixedly connected to one side, close to the shell, of the protective cover; the cavity is formed in the protective cover, the interface of the machine body can be hidden in the cavity, the protective cover is sealed on the front end face of the shell, the protective cover made of Teflon has the characteristic of moisture resistance, the protective cover seals the interface of the machine body and is not prone to being infected by dust or water drops, the interface is prevented from being exposed outside, when the machine body is transported or is not used for a long time, the dust or the water drops are prone to invading into the interface, the mid-point clamped three-level inverter is prone to being damaged, and the use problem is affected.
Description
Technical Field
The invention relates to the technical field of inverters, in particular to a midpoint clamping type three-level inverter with a dustproof and moistureproof structure.
Background
The neutral point clamped three-level inverter generates three levels by neutral point clamping and series connection of a direct current capacitor, has wider application in the field of high-power converters, has the advantages of small harmonic wave of output voltage and current, halving of voltage and switching loss born by a switching device and the like compared with a two-level inverter, and can effectively reduce the volume and weight of passive devices such as a filter and the like, so that the three-level NPC inverter is gradually applied from high-power medium voltage to a grid-connected inverter system of a photovoltaic, wind power and energy storage system with low voltage of 380V-690V, the multi-level inverter can reduce the voltage stress of the switching device, improve the switching frequency, has higher sine degree of output waveforms, is more and more applied in the occasions of motor driving, grid-connected inversion and the like, and has simple structure, the neutral-point clamped three-level inverter can be used by connecting interfaces when wiring is performed on the neutral-point clamped three-level inverter, but the wiring end face of the neutral-point clamped three-level inverter is exposed outside, so that the interfaces are exposed outside, dust or water drops easily invade into the interfaces when the neutral-point clamped three-level inverter is transported or is not used for a long time, the neutral-point clamped three-level inverter is easily damaged, and the use is influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a midpoint clamping type three-level inverter with a dustproof and moistureproof structure, which solves the problems that when the midpoint clamping type three-level inverter is transported or is not used for a long time, dust or water drops are easy to invade into the interface, the midpoint clamping type three-level inverter is easy to damage, and the use is influenced because the wiring end surface of the midpoint clamping type three-level inverter is exposed outside and the interface is exposed outside.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the neutral point clamping type three-level inverter with the dustproof and moistureproof structure comprises an inverter body, wherein a plurality of interfaces are arranged on the inverter body, a shell is arranged on the outer side of the inverter body, a protective cover is arranged on the front end face of the shell, a front baffle is fixedly connected to the front end face of the shell and positioned at the bottom of the shell, the protective cover is inserted in the front baffle, two limiting sliders are fixedly connected to one side of the protective cover close to the shell and are in sliding connection with the shell, the protective cover is provided with two mounting holes, springs are fixedly connected to the inner walls of the two mounting holes, one ends of the two springs are fixedly connected with stop blocks, the stop blocks slide in the mounting holes, the two stop blocks are respectively positioned above the two limiting sliders, a rotating plate is arranged at the top of the protective cover, and a rotating shaft is arranged on the rotating plate, the rotating shaft is fixedly connected with the outer shell, and the rotating plate is rotatably connected with the rotating shaft.
Preferably, the protective cover is provided with a cavity, and the plurality of interfaces are located in the cavity.
Preferably, the bottom of the protective cover is fixedly connected with a sealing plate, the front baffle is provided with a sealing groove, and the sealing plate is inserted in the sealing groove.
Preferably, the protective cover is fixedly connected with a viewing window corresponding to the interface.
Preferably, two sliding grooves are formed in the front end face of the shell, the two limiting sliding blocks slide in the two sliding grooves respectively, and the limiting sliding blocks and the sliding grooves are in a cross shape.
Preferably, the width of the stop block is twice the width of the limit slider.
Preferably, the material of protective cover is teflon.
Preferably, the depth of the mounting hole is one and a half times the length of the stop block.
Preferably, the rotating shaft is T-shaped.
Preferably, the rotating plate is located in the middle of the protective cover, and the top end face of the rotating plate is attached to the top end face of the protective cover.
(III) advantageous effects
The invention provides a midpoint clamping type three-level inverter with a dustproof and moistureproof structure, which has the following beneficial effects:
(1) the protective cover is arranged on the front end face of the shell, the protective cover is provided with a cavity, an interface of the machine body can be hidden in the cavity, the machine body is not used, the sealing plate is inserted into the sealing groove, the protective cover is sealed on the front end face of the shell, the protective cover made of Teflon has the characteristic of moisture resistance, the protective cover is used for sealing the interface of the machine body, the interface is not prone to being infected by dust or water drops, the interface is prevented from being exposed outside, the dust or the water drops are easy to intrude into the interface when the neutral point clamped three-level inverter is transported or is not used for a long time, and the problem of use is influenced.
(2) Through being provided with the rotor plate at the top of protective cover, the rotor plate can carry out rotary motion through the effect at the pivot under, when the protective cover is enclosing the interface of organism, the rotor plate can laminate on the top end face of protective cover, makes the motion of its spacing protective cover, can make the stable butt joint mouth of protective cover shelter from to when using the organism, only need rotate the rotor plate and leave the protective cover, and upwards slide the protective cover can.
(3) Through being provided with two stop blocks on the protective cover, when the protective cover rises, when making the interface expose, the stop block pops out under the effect of spring, and the stop block can be located the top terminal surface of shell this moment to can restrict the closing of protective cover, do not influence the interface and carry out the wiring operation, can be convenient for use the organism.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the movement of the protecting cover of the present invention;
FIG. 3 is a schematic view of a protective cover according to the present invention;
FIG. 4 is a schematic view showing the movement of the stopper and the rotating plate according to the present invention;
FIG. 5 is a schematic view of the stopper of the present invention;
fig. 6 is a schematic structural view of the rotating plate according to the present invention.
In the figure: 1. a body; 11. an interface; 2. a housing; 201. a chute; 21. a front baffle; 211. a sealing groove; 3. a protective cover; 301. a cavity; 302. mounting holes; 31. a viewing window; 32. a sealing plate; 33. a limiting slide block; 34. a stopper block; 35. a spring; 4. a rotating plate; 41. a rotating shaft.
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.
Referring to fig. 1-6, the present invention provides a technical solution: the neutral point clamping type three-level inverter with a dustproof and moistureproof structure comprises a machine body 1, wherein a plurality of interfaces 11 are arranged on the machine body 1, the interfaces 11 can connect the machine body 1 for use, a shell 2 is arranged on the outer side of the machine body 1, the shell 2 can protect the machine body 1, a protective cover 3 is arranged on the front end face of the shell 2, a front baffle 21 is fixedly connected to the front end face of the shell 2, the front baffle 21 is positioned at the bottom of the shell 2, the protective cover 3 is inserted in the front baffle 21, a sealing plate 32 is fixedly connected to the bottom of the protective cover 3, a sealing groove 211 is formed in the front baffle 21, the sealing plate 32 is inserted in the sealing groove 211, so that the protective cover 3 can be connected with the front baffle 21, the sealing performance of the protective cover 3 and the shell 2 is improved, two limiting slide blocks 33 are fixedly connected to one side of the protective cover 3 close to the shell 2, the limiting slide blocks 33 are slidably connected with the shell 2, and two slide grooves 201 are formed in the front end face of the shell 2, the two limit sliders 33 slide in the two sliding grooves 201 respectively, the limit sliders 33 and the sliding grooves 201 are both in a cross shape, when the protective cover 3 slides, the limit sliders 33 can slide in the sliding grooves 201, so that the protective cover 3 is connected with the casing 2 under the action of the limit sliders 33, the sliding position can be limited by the limit sliders 33 and the sliding grooves 201, the protective cover 3 is provided with two mounting holes 302, the inner walls of the two mounting holes 302 are fixedly connected with springs 35, one ends of the two springs 35 are fixedly connected with stop blocks 34, the stop blocks 34 slide in the mounting holes 302, the two stop blocks 34 are respectively positioned above the two limit sliders 33, the width of the stop blocks 34 is twice that of the limit sliders 33, when the protective cover 3 is in a closed state, the stop blocks 34 are positioned on the front end face of the casing 2, and the stop blocks 34 extrude the springs 35 to be hidden in the mounting holes 302, the depth of the mounting hole 302 is one half and five times of the length of the stop block 34, the mounting hole 302 has enough space to hide the stop block 34 in the mounting hole 302, and the stop block 34 is not blocked in the sliding slot 201, when the protective cover 3 is lifted, because the stop block 34 is connected with the spring 35, when the stop block 34 loses the shielding of the casing 2, the stop block 34 can automatically pop up under the action of the spring 35, the top of the protective cover 3 is provided with the rotating plate 4, the rotating plate 4 is provided with the rotating shaft 41, the rotating shaft 41 is fixedly connected with the casing 2, the rotating plate 4 is rotatably connected with the rotating shaft 41, the rotating shaft 41 is in a T shape, the rotating plate 4 can rotate under the action of the rotating shaft 41, the rotating shaft 41 can limit the position of the rotating plate 4, so that the rotating plate can only rotate around the rotating shaft 41, the rotating plate 4 can be tightly attached to the top end face of the protective cover 3, by arranging the protective cover 3 on the front end face of the casing 2, the protective cover 3 is provided with a cavity 301, a plurality of interfaces 11 are positioned in the cavity 301, the interfaces 11 of the machine body 1 can be hidden in the cavity 301, when the machine body 1 is not used, the sealing plate 32 is inserted into the sealing groove 211, the protective cover 3 is sealed on the front end face of the shell 2, the protective cover 3 made of Teflon has the characteristic of moisture resistance, the protective cover 3 seals the interfaces 11 of the machine body 1 and is not easy to be infected by dust or water drops, the interface 11 is prevented from being exposed outside, when the midpoint clamping type three-level inverter is transported or is not used for a long time, the dust or the water drops are easy to invade into the interfaces 11, the midpoint clamping type three-level inverter is easy to damage, and the use problem is influenced, the viewing window 31 corresponding to the interfaces 11 is fixedly connected on the protective cover 3, the viewing window 31 can directly view the shape of the interfaces 11 when the protective cover 3 is closed, the rotating plate 4 can perform a rotation movement under the action of the rotating shaft 41, when the protective cover 3 surrounds the interface 11 of the machine body 1, the rotating plate 4 is positioned in the middle of the protective cover 3, and the top end face of the rotating plate 4 is attached to the top end face of the protective cover 3, so that the protective cover 3 can limit the movement of the protective cover 3, the protective cover 3 can stably shield the interface 11, and when the machine body 1 is used, only the rotating plate 4 needs to be rotated to be separated from the protective cover 3 and the protective cover 3 is slid upwards, when the protective cover 3 is lifted to expose the interface 11, the stop block 34 is popped up under the action of the spring 35, at the moment, the stop block 34 can be positioned on the top end face of the shell 2, so that the protective cover 3 can be limited from being closed, the connection operation of the interface 11 is not influenced, the machine body 1 can be conveniently used, when the protective cover 3 is closed, only the stop blocks 34 on two sides of the protective cover 3 need to be pressed, the protective cover 3 is hidden in the mounting hole 302, then the protective cover 3 is slid downwards, the sealing plate 32 is inserted into the sealing groove 211, and the rotating plate 4 is rotated to be positioned on the protective cover 3, so that the protective cover 3 can protect the neutral-point clamped three-level inverter.
When the neutral point clamped three-level inverter is used, the protective cover 3 is arranged on the front end face of the shell 2, the protective cover 3 is provided with the cavity 301, the interface 11 of the machine body 1 can be hidden in the cavity 301, when the machine body 1 is not used, the sealing plate 32 is inserted into the sealing groove 211, the protective cover 3 is sealed on the front end face of the shell 2, the protective cover 3 made of Teflon has the characteristic of moisture resistance, the protective cover 3 seals the interface 11 of the machine body 1 and is not easy to be infected by dust or water drops, the interface 11 is prevented from being exposed outside, when the neutral point clamped three-level inverter is transported or is not used for a long time, the dust or the water drops are easy to invade into the interface 11, the neutral point clamped three-level inverter is easy to be damaged, and the use problem is influenced, the rotating plate 4 can rotate under the action of the rotating shaft 41, when the protective cover 3 surrounds the interface 11 of the machine body 1, the rotating plate 4 can be attached to the top end face of the protective cover 3 to limit the movement of the protective cover 3, so that the protective cover 3 can stably shield the interface 11, and when the machine body 1 is used, only the rotating plate 4 needs to be rotated to separate from the protective cover 3 and the protective cover 3 needs to be slid upwards, when the protective cover 3 rises to expose the interface 11, the stop block 34 pops up under the action of the spring 35, at the moment, the stop block 34 can be positioned on the top end face of the shell 2, so that the protective cover 3 can be limited from being closed, the connection operation of the interface 11 is not influenced, the machine body 1 can be conveniently used, when the protective cover 3 is closed, only the stop blocks 34 on two sides of the protective cover 3 need to be pressed to be hidden in the mounting hole 302, then the protective cover 3 is slid downwards to enable the sealing plate 32 to be inserted into the sealing groove 211, and the rotating plate 4 is rotated to be positioned on the protective cover 3, the protecting cover 3 can protect the neutral point clamped three-level inverter.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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. The phrase "comprising a defined element does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. Three level inverter of midpoint clamp type with dustproof dampproofing structure, including organism (1), be equipped with a plurality of interface (11) on organism (1), just organism (1) outside is equipped with shell (2), its characterized in that: the front end face of the shell (2) is provided with a protective cover (3), the front end face of the shell (2) is fixedly connected with a front baffle (21), the front baffle (21) is positioned at the bottom of the shell (2), the protective cover (3) is inserted into the front baffle (21), one side of the protective cover (3) close to the shell (2) is fixedly connected with two limiting sliders (33), the limiting sliders (33) are connected with the shell (2) in a sliding manner, the protective cover (3) is provided with two mounting holes (302), the inner walls of the two mounting holes (302) are fixedly connected with springs (35), one ends of the springs (35) are fixedly connected with stop blocks (34), the stop blocks (34) slide in the mounting holes (302), and the two stop blocks (34) are respectively positioned above the limiting sliders (33), protective cover (3) top is equipped with rotor plate (4), be equipped with pivot (41) on rotor plate (4), pivot (41) with shell (2) fixed connection, just rotor plate (4) with pivot (41) rotate to be connected.
2. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: cavity (301), a plurality of cavity (301) have been seted up in protective cover (3) interface (11) all are located in cavity (301).
3. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: protective cover (3) bottom fixedly connected with closing plate (32), seal groove (211) have been seted up in preceding baffle (21), closing plate (32) are pegged graft in seal groove (211).
4. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: and the protective cover (3) is fixedly connected with a viewing window (31) corresponding to the interface (11).
5. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: two sliding grooves (201) are formed in the front end face of the shell (2), the two limiting sliding blocks (33) slide in the two sliding grooves (201) respectively, and the limiting sliding blocks (33) and the sliding grooves (201) are in a cross shape.
6. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: the width of the stop block (34) is twice that of the limit slide block (33).
7. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: the protective cover (3) is made of Teflon.
8. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: the depth of the mounting hole (302) is one and a half times the length of the stopper (34).
9. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: the rotating shaft (41) is T-shaped.
10. The neutral point clamped three-level inverter with a dustproof and moistureproof structure as claimed in claim 1, wherein: the rotating plate (4) is located at the middle position of the protective cover (3), and the top end face of the rotating plate (4) is attached to the top end face of the protective cover (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993935.XA CN112054705B (en) | 2020-09-21 | 2020-09-21 | Midpoint clamping type three-level inverter with dustproof and moistureproof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010993935.XA CN112054705B (en) | 2020-09-21 | 2020-09-21 | Midpoint clamping type three-level inverter with dustproof and moistureproof structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112054705A CN112054705A (en) | 2020-12-08 |
| CN112054705B true CN112054705B (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010993935.XA Active CN112054705B (en) | 2020-09-21 | 2020-09-21 | Midpoint clamping type three-level inverter with dustproof and moistureproof structure |
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| CN (1) | CN112054705B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114158226B (en) * | 2021-12-08 | 2023-12-19 | 湖南工程学院 | Controller for intelligent coordination of cluster robot |
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| CN207692211U (en) * | 2017-12-20 | 2018-08-03 | 绍兴悦通新能源科技有限公司 | It is a kind of can Quick overhaul photovoltaic micro monitoring device |
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| CN112054705A (en) | 2020-12-08 |
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