CN210780621U

CN210780621U - Frequency converter

Info

Publication number: CN210780621U
Application number: CN201921771767.9U
Authority: CN
Inventors: 何珍; 陈鹏程; 张希; 黄恒奇; 刘红毅; 李玉平
Original assignee: Shenzhen Ambition Electronics Co ltd
Current assignee: Shenzhen Ambition Electronics Co ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-06-16
Anticipated expiration: 2029-10-21

Abstract

The utility model discloses a frequency converter, which comprises an upper shell, a radiator and a lower shell, wherein the upper shell is used for accommodating frequency converter components, and the lower ends of two opposite side plates are respectively provided with a bayonet; the radiator comprises a radiating top plate, wherein one side of the radiating top plate extends downwards to form a side support plate, the bottom end of the side support plate is provided with a support bottom plate, the side support plate extends towards the other side of the radiating top plate along the height direction along the direction parallel to the radiating top plate to form a plurality of radiating fins, and the radiating fins are distributed at intervals to form a radiating air duct; the lower shell is used for placing a radiator and comprises a bottom plate, and the bottom plate is provided with a lug boss corresponding to the bayonet; this converter components and parts include the drive plate, and this drive plate passes through the copper post to be installed on the radiator, and one side that the bottom is close to the side extension board is provided with the IGBT module, and the IGBT module passes through shell fragment and collateral branch board butt and fixes. The utility model discloses the IGBT module of the drive plate of converter passes through shell fragment and collateral branch board butt in order to dispel the heat, locking convenient operation.

Description

Frequency converter

Technical Field

The utility model relates to a converter technical field especially relates to a frequency converter.

Background

The frequency conversion technology is produced according to the requirement of stepless speed regulation of the alternating current motor. The frequency converter is mainly used for adjusting the rotating speed of an alternating current motor, and along with the improvement of components required by markets for transmission products, the speed regulation of the frequency converter plays an increasingly important role in many speed control application fields due to the advantages of wide speed regulation range, high speed regulation precision, good dynamic response and the like of the frequency converter. The existing frequency converter is unreasonable in heat dissipation design, poor in heat dissipation effect, easy to cause burning out of a circuit board, unreasonable in structural design and extremely inconvenient in later maintenance.

In view of the above, it is desirable to provide a frequency converter with a reasonable heat dissipation design and simple assembly to facilitate disassembly and maintenance.

Disclosure of Invention

The utility model aims to solve the technical problem that a converter so that dismouting and maintenance are convenient for that heat dissipation reasonable in design and assembly are simple is provided.

In order to solve the technical problem, the utility model discloses a as follows technical scheme: a frequency converter comprises an upper shell, a radiator and a lower shell, wherein the upper shell is used for accommodating frequency converter components, and the lower ends of two opposite side plates of the upper shell are respectively provided with at least one bayonet; the radiator comprises a radiating top plate, one side of the radiating top plate extends downwards to form a side supporting plate, the bottom end of the side supporting plate is provided with a supporting bottom plate, the side supporting plate extends towards the other side of the radiating top plate along the height direction of the side supporting plate along the direction parallel to the radiating top plate to form a plurality of radiating fins, and the radiating fins are distributed at intervals to form a radiating air duct; the lower shell is used for placing the radiator, the lower shell comprises a bottom plate, and the bottom plate is provided with a lug which is matched and clamped with the bayonet corresponding to the bayonet so as to cover the lower part of the upper shell and enable the lower shell to be detachably connected with the upper shell; the frequency converter component comprises a driving board, the driving board is installed on the radiator through a copper column, an IGBT module is arranged on one side, close to the side supporting plate, of the bottom of the driving board, and the IGBT module is abutted and fixed with the side supporting plate through an elastic sheet.

The further technical scheme is as follows: the IGBT module comprises a plurality of IGBT units, each IGBT unit is uniformly distributed along the length direction of the side edge of the drive board, each elastic sheet comprises an elastic sheet main body, each elastic sheet main body is fixed on one side of the side support plate back to the radiating fin, the upper side edge of each elastic sheet main body extends corresponding to each IGBT unit to form a pressing elastic sheet, and the pressing elastic sheets are in contact with the IGBT units to tightly press the IGBT units on the side support plates of the radiator.

The further technical scheme is as follows: and ventilation openings are respectively formed in the side plates of the upper shell corresponding to the two ends of the heat dissipation air duct.

The further technical scheme is as follows: the one end of casing is provided with one side down to the fan in heat dissipation wind channel, the one end of bottom plate is served the vertical fixation and is had a confession the mounting bracket of fan installation, the mounting bracket includes a roof and divides and locates the installation curb plate of installation roof both sides, installation roof and two installation curb plates enclose on the bottom plate and close and form a both ends open-ended cavity, the opening towards the radiator just the fan set up in the cavity, keep away from the installation curb plate edge of side extension board the side edge of bottom plate extends to the other end of bottom plate.

The further technical scheme is as follows: and a capacitor bank is arranged on one side of the bottom of the driving board, which is far away from the side support plate, an isolation bin is arranged on the bottom plate corresponding to the capacitor bank, and the capacitor bank is arranged in the isolation bin to isolate the radiator from the capacitor bank.

The further technical scheme is as follows: the isolation bin comprises a supporting baffle facing the fan and a side baffle which is arranged opposite to the installation side plate far away from the side support plate and is positioned between the radiator and the capacitor bank, and the supporting baffle, the side baffle and the installation side plate are enclosed on the bottom plate to form an accommodating space.

The further technical scheme is as follows: the supporting baffle plate is provided with a vent hole.

The further technical scheme is as follows: the frequency converter component is characterized by further comprising a control panel, the control panel is installed on the drive plate through a support column, a wiring area is arranged on the control panel to set a wiring terminal and a wiring net port, the upper shell corresponds to a wiring opening formed in the wiring area, and an upper cover plate is covered on the wiring opening.

The further technical scheme is as follows: the frequency converter further comprises a bottom cover plate, the bottom plate forms a supply under the mounting frame for the fan to be placed in, the bottom cover plate corresponds to the place where the fan is placed and extends upwards to form a sealing block, and the sealing block covers the place where the fan is placed so that the fan is fixed in the mounting frame.

The further technical scheme is as follows: a plurality of wiring holes are formed in the upper shell, and extend upwards towards the outer side of the upper shell.

The utility model has the advantages of: the converter is with converter components and parts holding in the upper casing, and the radiator is installed in the lower casing, converter components and parts include the drive plate, and the IGBT module of drive plate passes through shell fragment and the collateral branch board butt of radiator and locks in order to accelerate the radiating effect of drive plate, utilizes the elasticity of shell fragment to carry out fixed between the collateral branch board of IGBT module and radiator and can avoid directly utilizing when screw locking because the misoperation leads to causing damage and easy and simple to handle swift to collateral branch board and IGBT module. Simultaneously, go up casing, radiator and casing independent design down, form independent heat dissipation wind channel, the radiating effect is good, and shell structure is simple, sets up the bayonet socket through the lower extreme of the curb plate of last casing and the bottom plate of casing corresponds the bayonet socket setting and the lug of bayonet socket matched with joint so that casing and last casing can be dismantled and be connected down, the dismouting of being convenient for makes things convenient for the maintenance operation of converter.

Drawings

Fig. 1 is a schematic structural diagram of the frequency converter of the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is an exploded view of the frequency converter of FIG. 1;

FIG. 4 is a schematic view of another perspective exploded view of the frequency converter of FIG. 1;

fig. 5 is a schematic structural diagram of the lower case of the frequency converter of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1 to 4, in the present embodiment, the frequency converter 10 includes an upper casing 110, a heat sink 120, and a lower casing 130, where the upper casing 110 is used to accommodate a frequency converter component 140, and the lower ends of two opposite side plates 111 of the upper casing 110 are respectively provided with at least one bayonet 112. The heat sink 120 includes a heat dissipating top plate 121, a side support plate 122 is formed by extending one side of the heat dissipating top plate 121 downward, a supporting bottom plate 123 is disposed at a bottom end of the side support plate 122, the side support plate 122 extends along a height direction of the side support plate 122 toward the other side of the heat dissipating top plate 121 in a direction parallel to the heat dissipating top plate 121, and a plurality of heat dissipating fins 124 are formed by the heat dissipating fins 124 at intervals to form a heat dissipating air duct 125. The lower housing 130 is used for placing the heat sink 120, the lower housing 130 includes a bottom plate 131, the bottom plate 131 is provided with a protrusion 132 corresponding to the bayonet 112 and engaged with the bayonet 112 to cover the lower portion of the upper housing 110, so that the lower housing 130 is detachably connected to the upper housing 110. The frequency converter component 140 includes a driving board 141, the driving board 141 is mounted on the heat sink 120 through a copper pillar 1411, an IGBT module 1412 is disposed at a side of a bottom of the driving board 141 close to the side support plate 122, and the IGBT module 1412 abuts against and is fixed to the side support plate 122 through a spring piece 150.

Specifically, the upper housing 110 includes an upper top plate 113 and four side plates 111 enclosing together, a label adhering region 116 for adhering labels of the power and the model of the frequency converter is provided on the upper top plate 113, two bayonets 112 are provided at the lower ends of the side plates 111 at the left and right sides of the upper housing 110, correspondingly, the lower housing 130 is provided with two protrusions 132 at the left and right sides of the bottom plate 131 corresponding to the bayonets 112, the heat sink 120 is provided on the bottom plate 131, and the bayonets 112 are clamped into the protrusions 132 to detachably fix the upper housing 110 and the heat sink 120. Preferably, the lower end of the side plate 111 at the rear end of the upper housing 110 is provided with a bayonet 112, and correspondingly, the rear end of the bottom plate 131 is provided with a projection 132 corresponding to the bayonet 112. The total number of the copper pillars 1411 is four, and the copper pillars 1411 are respectively disposed at the front and rear ends of the heat dissipation top plate 121, two receiving holes for the copper pillars 1411 to be disposed are respectively formed at the front and rear ends of the heat dissipation top plate 121, one end of the copper pillars 1411 is fixed in the receiving holes, and the other end of the copper pillars 1411 is fixed to the driving plate 141, so that the driving plate 141 is mounted on the heat dissipation top plate 121 of the heat sink 120. The copper column 1411 can ensure that a heat dissipation space exists between the driving board 141 and the heat sink 120, bottom line connection is facilitated, installation between the heat sink 120 and the driving board 141 can be performed quickly, disassembly and assembly are facilitated, and maintenance of the frequency converter 10 is facilitated. The heat sink 120 is disposed on the bottom plate 131 of the lower case 130 in a state where the side support plate 122 faces the side plate 111 on the left side of the upper case 110, and an IGBT module 1412 is disposed on the left side of the bottom of the driving plate 141 outside the side support plate 122 of the heat sink 120, and the IGBT module 1412 is pressed by the elastic piece 150 and is fixed in contact with the side support plate 122.

Go up casing 110, radiator 120 and casing 130 and independently design respectively down, heat dissipation wind channel 125 is independent, and the radiating effect is good, go up casing 110 and between casing 130 through bayonet socket 112 and lug 132 mutually support the joint so that the equipment and the dismantlement of converter 10 are maintained more conveniently moreover, go up casing 110 and casing 130's cooperation can prevent that radiator 120's fin 124 from receiving external damage down.

Preferably, in this embodiment, the IGBT module 1412 includes a plurality of IGBT units 1413, each of the IGBT units 1413 is uniformly distributed along the length direction of the side of the driving board 141 and faces the side supporting board 122 of the heat sink 120, the elastic piece 150 includes an elastic piece main body 151, the elastic piece main body 151 faces the side supporting board 122 and is fixed to a side of the side supporting board 122 facing away from the heat sink 124, an abutting elastic piece 152 is formed by extending the upper side of the elastic piece main body 151 corresponding to each of the IGBT units 1413, and the abutting elastic piece 152 contacts with the corresponding IGBT unit 1413 to press the IGBT unit 1413 against the side supporting board 122 of the heat sink 120. The IGBT module 1412 of the driving board 141 is pressed against the side support plates 122 of the heat sink 120 by the elasticity of the elastic sheet 150 to accelerate the heat dissipation effect of the IGBT module 1412, and it is not necessary to lock each IGBT unit 1413 with screws, so that the operation is simple and convenient, and the heat sink 120 and the IGBT units 1413 are prevented from being damaged by improper operation during the locking process.

Preferably, ventilation openings 1111 are respectively formed on the side plates 111 at the front and rear ends of the upper housing 110 corresponding to the front and rear ends of the heat dissipation duct 125. The air duct opening 1112 of the ventilation opening 1111 is attached to the heat dissipation air duct 125 to improve the heat dissipation effect.

Preferably, in this embodiment, a fan 133 facing the heat dissipation air duct 125 is disposed at one end of the lower housing 130, a mounting rack 134 for mounting the fan 133 is vertically fixed at one end of the bottom plate 131, the mounting rack 134 includes a top mounting plate 1341 and mounting side plates 1342 respectively disposed at two sides of the top mounting plate 1341, the top mounting plate 1341 and the two mounting side plates 1342 enclose a cavity 1343 with two open ends on the bottom plate 131, the opening faces the heat sink 120, the fan 133 is disposed in the cavity 1343, and the mounting side plates 1342 far away from the side support plates 122 extend from one end of the bottom plate 131 to the other end of the bottom plate 131 along the side edge of the bottom plate 131. Specifically, the mounting side plate 1342 of the mounting frame 134, which is far away from the side branch plate 122, extends from one end of the bottom plate 131 to the other end of the bottom plate 131 along the edge of the right side of the bottom plate 131, so that the hot air generated by the heat dissipation air duct 125 circulates between the mounting side plate 1342 and the side branch plate 122, the sealing performance is strong, the frequency converter component 140 is prevented from being damaged, an independent heat dissipation air duct 125 is formed, and the heat dissipation effect is good.

Meanwhile, the fan 133 is used to accelerate the air flow of the heat dissipation air duct 125, so as to further improve the heat dissipation effect of the heat sink 120. The front end of the lower housing 130 and the front end of the upper housing 110 are both correspondingly located at the front end of the heat dissipation air duct 125, the fan 133 is disposed facing the front end of the heat dissipation air duct 125, so that air is drawn into the heat dissipation air duct 125 from the ventilation opening 1111 at the rear side of the upper housing 110, hot air is guided out from the ventilation opening 1111 at the fan 133 side, and the heat dissipation effect is improved.

Preferably, with reference to fig. 3 to 5, in this embodiment, a capacitor bank 1414 is disposed on a side of the bottom of the driving board 141 away from the side support plate 122, an isolation bin 135 is disposed on the bottom plate 131 corresponding to the capacitor bank 1414, and the capacitor bank 1414 is disposed in the isolation bin 135 to isolate the heat sink 120 from the capacitor bank 1414, so as to prevent the capacitor bank 1414 from being damaged by hot air emitted from the heat sink 120. Specifically, the isolation chamber 135 includes a supporting baffle plate 1351 facing the fan 133 and a side baffle plate 1352 disposed opposite to the mounting side plate 1342 away from the side support plate 122 and located between the heat sink 120 and the capacitor bank 1414, the supporting baffle plate 1351, the side baffle plate 1352 and the mounting side plate 1342 enclose a receiving space 1353 on the bottom plate 131, and the receiving space 1353 is open at an upper end for placing the capacitor bank 1414. Specifically, the baffle 1351 is close to the fan 133 and is provided with a vent 1354, so that the fan 133 is used to draw air into the isolation bin 135 and guide the air out, so as to dissipate heat of the capacitor bank 1414. The front end of the isolation bin 135 is the branch baffle 1351, and the rear end of the isolation bin 135 can be in an open design relative to the branch baffle 1351, so that the fan 133 can be used to draw air from the ventilation opening 1111 at the rear side of the upper housing 110, and the air is guided out from the ventilation opening 1111 at the fan 133 side after entering the isolation bin 135, so as to accelerate the heat dissipation effect of the capacitor bank 1414.

In some embodiments, the upper housing 110 has a plurality of wiring holes 1101, and specifically, the upper housing 110 and the upper top plate 113 have a plurality of wiring holes 1101, and the wiring holes 1101 are preferably circular and extend upward toward the outer side of the upper housing 110, so that the appearance of the frequency converter 10 can be decorated, the screwdriver can be accurately positioned, and the wiring is convenient and quick.

Specifically, in this embodiment, the frequency converter component 140 further includes a control board 142, and the control board 142 is mounted on the driving board 141 through a supporting column 1421. The total number of the support columns 1421 is four, the left and right sides of the upper surface of the drive board 141 are equally divided into two support column installation positions, the lower surface of the control board 142 corresponds to the support column installation positions of the drive board 141 are provided with support column accommodating holes, one end of each support column 1421 is pressed in through a pressing mode, the other end of each support column 1421 is pressed in through a pressing mode, the support column accommodating holes are formed in the other end of each support column accommodating hole, so that the control board 142 is installed on the drive board 141, the support columns 1421 are used for being installed between the control board 142 and the drive board 141 quickly, the frequency converter 10 is convenient to disassemble and assemble, and heat dissipation intervals can exist between the drive board 141 and the control board.

Preferably, in this embodiment, the control board 142 is provided with a wiring area 143 for providing the wiring terminal 1431 and the wiring network port 1432, the upper housing 110 is formed with a wiring opening corresponding to the wiring area 143, which is convenient for the wiring operation of the user, and the wiring opening is covered with an upper cover plate 114 to protect the wiring terminal 1431 and the wiring network port 1432 from being damaged by the outside. The wiring area 143 and the wiring hole 1101 of the upper housing 110 are respectively and correspondingly located on two opposite sides of the upper housing 110, specifically, the wiring area 143 is correspondingly located at the front end of the upper housing 110, the wiring hole 1101 of the upper housing 110 is located at the rear end of the upper housing 110, the upper cover plate 114 is hinged to the upper top plate 113, the upper cover plate 114 can be opened and closed by rotating the upper cover plate 114, and the operation is convenient and simple. Preferably, an observation port 115 is formed at an upper end of one side plate 111 of the upper case 110, so as to facilitate observation of whether the cables are compressed during the wire connecting operation, and the observation port 115 may be disposed on the side plate 111 facing the wire connecting region 143.

With reference to fig. 1 to fig. 5, in this embodiment, the frequency converter 10 further includes a bottom cover 160, the bottom plate 131 forms an inlet 1344 below the mounting block 134 for the fan 133 to be inserted into, the bottom cover 160 extends upward to form a sealing block 161 corresponding to the inlet 1344, and the sealing block 161 covers the inlet 1344 to fix the fan 133 in the mounting block 134.

To sum up, the utility model discloses the converter with converter components and parts holding in the upper shell, the radiator is installed at the inferior valve internally, converter components and parts include the drive plate, the IGBT module of drive plate passes through the lateral plate butt of shell fragment and radiator and locks the radiating effect in order to accelerate the drive plate, utilizes the elasticity of shell fragment to carry out fixed when directly utilizing screw locking because improper operation leads to offside extension board and IGBT module to cause damage and easy and simple to handle swift between the lateral plate of IGBT module and radiator. Simultaneously, go up casing, radiator and casing independent design down, form independent heat dissipation wind channel, the radiating effect is good, and shell structure is simple, sets up the bayonet socket through the lower extreme of the curb plate of last casing and the bottom plate of casing corresponds the bayonet socket setting and the lug of bayonet socket matched with joint so that casing and last casing can be dismantled and be connected down, the dismouting of being convenient for makes things convenient for the maintenance operation of converter. Simultaneously, be provided with the mounting bracket of air feed fan installation on casing down, and keeping away from of mounting bracket the installation curb plate of side extension board extends to the other end of bottom plate along the side of bottom plate to the hot-blast circulation between this installation curb plate and the collateral branch board that makes the heat dissipation wind channel produce, the leakproofness is strong, and avoids causing the damage to converter components and parts.

The foregoing is considered as illustrative of the preferred embodiments of the invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made on the basis of the above embodiments by those skilled in the art, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.

Claims

1. A frequency converter is characterized by comprising:

the lower ends of two opposite side plates of the upper shell are respectively provided with at least one bayonet;

the radiator comprises a radiating top plate, one side of the radiating top plate extends downwards to form a side supporting plate, the bottom end of the side supporting plate is provided with a supporting bottom plate, the side supporting plate extends towards the other side of the radiating top plate along the height direction of the side supporting plate along the direction parallel to the radiating top plate to form a plurality of radiating fins, and the radiating fins are distributed at intervals to form a radiating air duct;

the lower shell is used for placing the radiator and comprises a bottom plate, and the bottom plate is provided with a convex block which is matched and clamped with the bayonet corresponding to the bayonet so as to cover the lower part of the upper shell and enable the lower shell to be detachably connected with the upper shell;

the frequency converter component comprises a driving board, the driving board is installed on the radiator through a copper column, an IGBT module is arranged on one side, close to the side supporting plate, of the bottom of the driving board, and the IGBT module is abutted and fixed with the side supporting plate through an elastic sheet.

2. The frequency converter according to claim 1, wherein the IGBT module comprises a plurality of IGBT units, each of the IGBT units is uniformly distributed along a length direction of a side of the drive board, the spring plate comprises a spring plate main body, the spring plate main body is fixed to a side of the side support plate facing away from the heat sink, and a pressing spring plate is formed by extending an upper side of the spring plate main body corresponding to each of the IGBT units, and the pressing spring plate is in contact with the IGBT units to press the IGBT units against the side support plate of the heat sink.

3. The frequency converter according to claim 1, wherein ventilation openings are respectively formed on the side plates of the upper housing corresponding to the two ends of the heat dissipation air duct.

4. The frequency converter according to claim 1, wherein a fan facing the heat dissipation air duct is disposed at one end of the lower housing, a mounting frame for mounting the fan is vertically fixed at one end of the bottom plate, the mounting frame includes a top mounting plate and two side mounting plates respectively disposed at two sides of the top mounting plate, the top mounting plate and the two side mounting plates enclose a cavity with two open ends on the bottom plate, the opening faces the heat sink, the fan is disposed in the cavity, and the side mounting plate away from the side supporting plate extends from one end of the bottom plate to the other end of the bottom plate along a side edge of the bottom plate.

5. The frequency converter according to claim 4, wherein a capacitor bank is disposed on a side of the bottom of the driving board away from the side support plate, an isolation bin is disposed on the bottom board corresponding to the capacitor bank, and the capacitor bank is disposed in the isolation bin to isolate the heat sink from the capacitor bank.

6. The frequency converter according to claim 5, wherein the isolation chamber comprises a supporting baffle plate facing the fan and a side baffle plate arranged opposite to the mounting side plate far away from the side support plate and located between the radiator and the capacitor bank, and the supporting baffle plate, the side baffle plate and the mounting side plate enclose a containing space on the bottom plate.

7. The frequency converter according to claim 6, wherein said supporting baffle is provided with a vent hole.

8. The frequency converter according to claim 1, wherein the frequency converter component further comprises a control board, the control board is mounted on the driving board through a supporting pillar, the control board is provided with a wiring area for arranging a wiring terminal and a wiring network port, the upper housing forms a wiring opening corresponding to the wiring area, and an upper cover plate covers the wiring opening.

9. The frequency converter according to claim 4, further comprising a bottom cover plate, wherein the bottom plate forms an inlet for the fan to be inserted under the mounting bracket, the bottom cover plate extends upward to form a sealing block corresponding to the inlet, and the sealing block covers the inlet to fix the fan in the mounting bracket.

10. The frequency converter according to claim 1, wherein the upper housing defines a plurality of wiring holes extending upwardly toward an outer side of the upper housing.