CN217883240U

CN217883240U - Three-level inverter for controlling direct-current bus voltage

Info

Publication number: CN217883240U
Application number: CN202221863503.8U
Authority: CN
Inventors: 李书同
Original assignee: Xianao Shanghai Electric Technology Co ltd
Current assignee: Xianao Shanghai Electric Technology Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-22
Anticipated expiration: 2032-07-19

Abstract

The utility model relates to a three-level inverter technical field especially relates to a three-level inverter for direct current bus voltage control. The technical scheme comprises the following steps: the air conditioner comprises a fixing seat and a shell, wherein a fixing groove is formed in the middle of the top of the fixing seat, the shell is inserted into the inner surface of the fixing groove, an inversion control plate is installed at the bottom of the shell through an installation column, air holes are formed in the two sides of the shell close to the bottom of the shell, an air ventilation seat is installed on one side, located in the air holes, of the shell, and a fan is installed inside the air ventilation seat. The utility model provides a current device adopt the bolt to fix a position fixedly more, the cost time is longer during the dismouting, dismouting inefficiency, maintenance efficiency is not good, and the dust screen has certain weakening to the air flow of casing, and when contravariant control board high temperature, the casing air flow is poor, the fragile problem of contravariant control board, has reduced the dismouting cost time of casing, and then has improved three level inverter's maintenance efficiency.

Description

Three-level inverter for controlling direct-current bus voltage

Technical Field

The utility model relates to a three-level inverter technical field specifically is a three-level inverter for direct current bus voltage control.

Background

With the rapid development of high-voltage technology and the gradual expansion of the application range of the high-voltage technology in the field of industrial control in recent years, the application fields of high-voltage IGBT devices and high-voltage IGCT devices are expanded, and the three-level inverter has the advantages of large output capacity, high output voltage, small current harmonic content and the like, so that the three-level inverter is widely applied in the field of high-voltage high-power direct-current bus voltage.

Through the massive search, find that the inverter in the prior art, like the zero common mode voltage modulation system of a flying capacitor type three-level inverter disclosed as publication No. CN214480304U, set up the stationary blade that the surface is equipped with the circular fixed screw hole of link-up form and the top of siren through the mainboard left and right sides and be equipped with 5 warning lights, make the mainboard can fix the mainboard inside the main part through the mode of screwing the screw into fixed screw inside, and the siren can be continued the scintillation when receiving auxiliary power supply abnormal voltage by the siren, remind the user of breaking down from this, thereby can in time remind the user to change the dc-to-ac converter, avoid the inverter still using for a long time after breaking down, not only avoid causing the inverter to appear and avoid a series of subsequent incident that probably appear, be favorable to the in-service use.

The existing three-level inverter is mainly fixed by bolts, the time spent during assembly and disassembly is long, the assembly and disassembly efficiency is low, the maintenance efficiency is poor, the ventilation volume of a shell is weakened by a dustproof net, when the temperature of an inversion control plate is too high, the ventilation volume of the shell is poor, and the inversion control plate is easy to damage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three level dc-to-ac converter for direct current bus voltage control possesses the advantage that makes things convenient for the dismouting, has solved current device and has adopted the bolt more to fix a position fixedly, and the cost time is longer during the dismouting, and the dismouting is inefficient, and maintenance efficiency is not good, and the dust screen has certain weakening to the air flow of casing, and when the inverter control board high temperature, the casing air flow is poor, the fragile problem of inverter control board.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a three-level inverter for direct current bus voltage control, includes fixing base and casing, wherein be equipped with the fixed slot in the middle of the fixing base top, the fixed slot internal surface is pegged graft and is had the casing, the contravariant control panel is installed through the erection column to the bottom in the casing, the casing both sides are close to the bottom and are equipped with the bleeder vent, the inside bleeder vent one side that is located of casing installs the seat of ventilating, the seat internally mounted that ventilates has the fan, the inside both sides that are located of casing ventilates seat one side and install the dust screen, both sides the dust screen is close to top clearance position department and installs the connecting plate, the motor is installed to top one side in the casing, motor output shaft installs the regulation pole, it cup joints in the connecting plate to adjust the pole, be equipped with the displacement groove in the middle of the fixing base is inside, all install the buckle through the locating pin in the middle of the both sides of displacement groove, both sides buckle clearance position department installs the spring through the spring holder.

Preferably, the adjusting rod is connected with the connecting plate in a screwing mode through threads.

Preferably, a positioning rod is installed on one side, far away from the motor, of the interior of the shell, and the positioning rod is inserted into the connecting plate.

Preferably, the shell is made of aluminum alloy, and the upper surface of the shell is provided with radiating fins.

Preferably, fixing rods are installed at four angular positions of the lower surface of the fixing seat, and shock-absorbing pads are installed on the outer surfaces of the fixing rods, which are located on the lower surface of the fixing seat.

Preferably, a clamping groove is formed in the position, located at the clamping position, of the bottom of the shell, and the clamping buckle is clamped inside the clamping groove.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a set up fixing base, buckle and draw-in groove, reach the effect of carrying out quick assembly disassembly to the casing, it is fixed to carry out the bayonet lock to the casing through the buckle to it fixes a position to solve to adopt the bolt more, and the cost time is longer during the dismouting, and the dismouting is inefficient, and the not good problem of maintenance efficiency has reduced the dismouting cost time of casing, and then has improved three-level inverter's maintenance efficiency.

2. The utility model discloses a set up the dust screen, the connecting plate, motor and regulation pole, reach and conveniently put aside the dust screen, increase the effect of casing air flow, it rotates to drive the regulation pole through the motor, drive connecting plate and dust screen removal through adjusting the pole, thereby increase the air flow of casing, there is certain weakening to the air flow of casing in order to solve the dust screen, when contravariant control board high temperature, the casing air flow is poor, the fragile problem of contravariant control board, three-level inverter's radiating efficiency has been improved.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

fig. 3 is an enlarged structural diagram of B in fig. 1.

Reference numerals: 1. a shock pad; 2. a fixed seat; 3. a fixing groove; 4. a fixing rod; 5. adjusting a rod; 6. a motor; 7. a connecting plate; 8. a heat dissipating fin; 9. an inversion control board; 10. mounting a column; 11. positioning a rod; 12. a housing; 13. buckling; 14. a spring; 15. a displacement slot; 16. a card slot; 17. positioning pins; 18. a dust screen; 19. a ventilation seat; 20. a fan; 21. and (4) air holes.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1-3, to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a three level inverter for direct current bus voltage control, including fixing base 2 and casing 12, be equipped with fixed slot 3 in the middle of the 2 tops of fixing base, 3 internal surfaces of fixed slot are pegged graft and are had casing 12, casing 12 internally mounted has temperature sensor, the contravariant control panel 9 is installed through erection column 10 to the bottom in the casing 12, casing 12 both sides are close to the bottom and are equipped with bleeder vent 21, casing 12 is inside to be located bleeder vent 21 one side and installs ventilation seat 19, ventilation seat 19 internally mounted has fan 20, casing 12 is inside to be located both sides ventilation seat 19 one side and install dust screen 18, prevent that the dust from getting into the utility model discloses, both sides dust screen 18 is close to top clearance position department and installs connecting plate 7, motor 6 is installed to top one side in casing 12, motor 6 is installed to motor 6 output shaft, regulation pole 5 cup joints in connecting plate 7, regulation pole 5 closes with connecting plate 7 through the screw thread soon with connecting plate 7 and is connected, drive connecting plate 7 through regulation pole 5 and removes, casing 12 is inside to keep away from motor 6 one side and installs locating lever 11, locating lever 11 is pegged graft inside connecting plate 7, casing 12 adopts the aluminum alloy to make, casing 12 is last surface mounting has heat radiation fins 8 on casing 12, increases casing 12's heat dissipation efficiency, four departments all installs the fixing base 2 lower surface mounting, and increases the stability of shock attenuation pad, and increases the utility model 1.

The operating principle of a three-level inverter for dc bus voltage control based on embodiment 1 is as follows: will the utility model discloses after the installation, during the use, carry out real-time voltage control to the direct current bus through contravariant control panel 9, and contravariant control panel 9 production of heat when moving, 19 take outside air out through the seat of ventilating of one side, filter the back through dust screen 18, carry to inside

casing

12, 19 with the inside steam of casing 12 of the seat of ventilating of rethread opposite side pass through bleeder vent 21 and discharge, and when 9 high temperatures of contravariant control panel, starter motor 6, drive through motor 6 and adjust pole 5 and rotate, drive connecting plate 7 through adjusting pole 5 and remove, thereby it moves up to drive dust screen 18, and increase casing 12's air flow promptly, thereby carry out high-efficient cooling to casing 12 inside, to this point, this equipment work flow is accomplished.

Example two

As shown in fig. 1-3, the present invention provides a three-level inverter for dc bus voltage control, compared to the first embodiment, the present embodiment further includes: be equipped with displacement groove 15 in the middle of fixing base 2 is inside, all install buckle 13 through locating pin 17 in the middle of 15 inside both sides in displacement groove, and spring 14 is installed through spring 14 seat in 13 clearance position departments of both sides buckle, and 12 bottoms of casing are located buckle 13 position department and are equipped with draw-in groove 16, and buckle 13 clamps inside draw-in groove 16.

In this embodiment, when casing 12 is dismantled to needs, press both sides buckle 13, break away from buckle 13 and draw-in groove 16, pull up casing 12 again, with casing 12 and the separation of fixing base 2, can maintain casing 12 inside, when installation casing 12, insert casing 12 in the fixed slot 3 to inside 16 of draw-in groove are gone into to buckle 13 card, thereby fix casing 12.

The above embodiments are merely some preferred embodiments of the present invention, and those skilled in the art can make various alternative modifications and combinations to the above embodiments based on the technical solution of the present invention and the related teachings of the above embodiments.

Claims

1. A three-level inverter for DC bus voltage control, includes fixing base (2) and casing (12), its characterized in that: fixed slot (3) are equipped with in the middle of fixing base (2) top, fixed slot (3) internal surface is pegged graft and is had casing (12), contravariant control panel (9) is installed through erection column (10) to the bottom in casing (12), casing (12) both sides are close to the bottom and are equipped with bleeder vent (21), casing (12) inside is located bleeder vent (21) one side and installs ventilation seat (19), ventilation seat (19) internally mounted has fan (20), casing (12) inside is located both sides ventilation seat (19) one side and installs dust screen (18), both sides dust screen (18) are close to top clearance position department and install connecting plate (7), motor (6) are installed to casing (12) interior top one side, motor (6) output shaft is installed and is adjusted pole (5), adjust pole (5) cup joint in connecting plate (7), be equipped with displacement groove (15) in the middle of fixing base (2) inside, buckle (13) are all installed through locating pin (17) in the middle of displacement groove (15) inside both sides buckle (13) clearance position department installs spring (14) through the spring holder.

2. The three-level inverter for dc bus voltage control according to claim 1, wherein: the adjusting rod (5) is connected with the connecting plate (7) in a screwing mode through threads.

3. The three-level inverter for dc bus voltage control according to claim 1, wherein: a positioning rod (11) is installed on one side, away from the motor (6), of the interior of the shell (12), and the positioning rod (11) is inserted into the connecting plate (7).

4. The three-level inverter for dc bus voltage control according to claim 1, wherein: the shell (12) is made of aluminum alloy, and the upper surface of the shell (12) is provided with radiating fins (8).

5. The three-level inverter for dc bus voltage control according to claim 1, wherein: dead lever (4) are all installed to four angular position departments of fixing base (2) lower surface, dead lever (4) surface is located fixing base (2) lower surface mounting and has shock pad (1).

6. The three-level inverter for dc bus voltage control according to claim 1, wherein: a clamping groove (16) is formed in the position, located on the buckle (13), of the bottom of the shell (12), and the buckle (13) is clamped inside the clamping groove (16).