CN216929856U

CN216929856U - Frequency converter

Info

Publication number: CN216929856U
Application number: CN202220169333.7U
Authority: CN
Inventors: 余润杰; 李创晓; 韦元林; 樊胜利
Original assignee: Shenzhen Mbk Driving Technology Co ltd
Current assignee: Shenzhen Mbk Driving Technology Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-07-08
Anticipated expiration: 2032-01-21

Abstract

The utility model relates to a frequency converter, which comprises a shell, a heat dissipation assembly, a capacitor plate and a drive plate, wherein the heat dissipation assembly comprises a fan and a radiator, the capacitor plate and the drive plate are fixedly stacked on the radiator, the drive plate is positioned above the capacitor plate, the shell covers the drive plate and is connected with the radiator, the capacitor plate is provided with a relay and a capacitor, the drive plate is provided with a transformer, an IGBT module and an MOS (metal oxide semiconductor) tube, the radiator is provided with a capacitor groove, the capacitor groove extends towards the direction of a heat dissipation air channel, the capacitor is hermetically arranged in the capacitor groove, the relay, the transformer, the IGBT module and the MOS tube are in contact connection with the radiator, the radiator is provided with the heat dissipation air channel, the fan is fixed at one end of the heat dissipation air channel, and the fan is aligned with the heat dissipation air channel and blows inwards to dissipate heat. The utility model has the beneficial effects that: compared with the prior art, the main heating elements in the frequency converter are in contact connection with the radiator for heat dissipation, so that the frequency converter can dissipate heat quickly, and the service life is prolonged.

Description

Frequency converter

Technical Field

The utility model relates to the field of power electronics, in particular to a frequency converter.

Background

With the development of industrial automation, the application industry of the frequency converter is very wide, the application environment is complex and various, and the frequency converter has high humidity, high oil stain, high dust, cotton wool and the like. In these industries, the frequency converter is required to have good air duct independence, that is, the heat dissipation air duct at the bottom layer has high-flow-rate air to exchange heat with the radiator, and the chassis at the upper layer is relatively closed, so that the phenomenon that moisture, dust and the like enter to cause short circuit of the PCB is avoided.

In the medium and small power frequency converter, the rectification and inversion unit devices mainly use an integrated IGBT module which is a main heating source of the frequency converter, and the current technology only installs and fixes the IGBT module on a radiator for heat dissipation. However, in the frequency converter, the transformer, the MOS transistor and the relay are also important heating devices, and the assembly of the transformer, the MOS transistor and the relay in the sealed case can cause the ambient temperature in the case to be higher, thereby affecting the stability and the service life of the frequency converter.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a frequency converter which is realized by the following technical scheme.

The utility model provides a frequency converter, includes shell, radiator unit, electric capacity board and drive plate, radiator unit includes fan and radiator, electric capacity board, the stack-up fixing of drive plate are on the radiator, the drive plate is located the top of electric capacity board, the shell lid closes on the drive plate and is connected with the radiator, install relay and condenser on the electric capacity board, install transformer, IGBT module and MOS pipe on the drive plate, the capacitor groove has been seted up on the radiator, condenser seal installation is in the capacitor groove, the last surface contact of relay, transformer, IGBT module, MOS pipe and radiator is connected, the heat dissipation wind channel has been seted up to the radiator, the capacitor groove extends towards heat dissipation wind channel direction, the one end at heat dissipation wind channel is fixed to the fan, the fan is aimed at the one end in heat dissipation wind channel and is bloied the heat dissipation.

Furthermore, the radiator is further provided with a shaft column, and the driving plate and the capacitor plate are fixed above the radiator through the shaft column.

Furthermore, the drive board is provided with a through hole below the transformer, the transformer is connected with first heat-conducting silica gel, and the first heat-conducting silica gel penetrates through the through hole to be in contact connection with the radiator so as to realize heat dissipation of the transformer.

Further, still be provided with first heat dissipation boss, second heat dissipation boss, third heat dissipation boss and radiating groove on the radiator, first heat dissipation boss is connected with the contact of IGBT module, second heat dissipation boss is connected with the contact of MOS pipe, third heat dissipation boss is connected with the transformer contact through first heat conduction silica gel, the relay is placed in the radiating groove, be provided with second heat conduction silica gel between relay and the radiating groove, make the relay pass through second heat conduction silica gel and be connected with the radiator contact.

Further, the heat dissipation air duct includes a first heat dissipation air duct and a second heat dissipation air duct.

Furthermore, a first radiating fin and a plurality of second radiating fins are arranged on the radiator, a first radiating air duct is formed between one side of the first radiating fin and the inner wall of one side of the radiator, a second radiating air duct is formed between the other side of the first radiating fin and the inner wall of the other side of the radiator, and the plurality of second radiating fins are arranged in the second radiating air duct in parallel.

Furthermore, a plurality of ventilation grooves are formed in the outer wall of the capacitor groove, and the ventilation grooves are used for heat dissipation of the capacitor.

Further, still include the sealing washer, the sealing washer is multilayer annular structure, the sealing washer suit makes between condenser and the electric capacity groove sealing connection on the condenser.

The utility model has the beneficial effects that: compared with the prior art, the radiator is provided with the fan at one end, the fan aims at one end of the heat dissipation air channel to blow air for heat dissipation, the capacitor is arranged in the capacitor groove for heat dissipation, the relay, the transformer, the IGBT module and the MOS tube are in contact connection with the surface of the radiator for heat dissipation, the first heat dissipation air channel and the second heat dissipation air channel are adopted for separate heat dissipation, heat can be dissipated quickly and effectively, and the service life of the frequency converter is prolonged. Because the plurality of second radiating fins are arranged in the second radiating air duct, a plurality of independent radiating air ducts are formed, the radiating of the radiator is accelerated, and a better radiating effect is achieved.

Drawings

FIG. 1 is an exploded view of the construction of the frequency converter of the present invention;

FIG. 2 is a front perspective view of the heat sink of the present invention;

FIG. 3 is a rear perspective view of the heat sink of the present invention;

fig. 4 is a structural sectional view of the capacitor mounting of the present invention.

Detailed Description

The present invention is further illustrated by the following examples, which are only some examples of the present invention, and these examples are only for explaining the present invention and do not limit the scope of the present invention in any way.

As shown in fig. 1-4, a frequency converter includes a housing 2, a heat dissipation assembly 1, a capacitor plate 4 and a driving board 3, wherein the heat dissipation assembly 1 includes a fan 12 and a heat sink 11, the capacitor plate 4 and the driving board 3 are fixed on the heat sink 11 in a stacked manner, the driving board 3 is located above the capacitor plate 4, the housing 2 covers the driving board 3 and the capacitor plate 4 and is connected to the heat sink 11, a relay 41 and a capacitor 42 are installed on the capacitor plate 4, a transformer 31, an IGBT module 33 and an MOS transistor 32 are installed on the driving board 3, a capacitor slot 115 is opened on the heat sink 11, the capacitor 42 is hermetically installed in the capacitor slot 115, the relay 41, the transformer 31, the IGBT module 33 and the MOS transistor 32 are connected to an upper surface of the heat sink 11 in a contact manner, a heat dissipation air duct is opened on the heat sink 11, the capacitor slot 115 extends toward the heat dissipation air duct, the fan 12 is fixed at one end of the heat dissipation air duct, and the fan aims at one end of the heat dissipation air duct and blows air to dissipate heat towards the inside of the heat dissipation air duct.

The working principle of the utility model is as follows:

the capacitor plate 4 and the drive plate 3 are fixed above the radiator 11, the capacitor plate 4 is provided with the relay 41 and the capacitor 42, the drive plate 3 is provided with the transformer 31, the IGBT module 32 and the MOS tube 33, the capacitor 42 is installed in a capacitor groove 115 of the radiator, the relay 41, the transformer 31, the IGBT module 33 and the MOS tube 32 are in contact connection with the radiator 11 and conduct heat to the radiator through contact, the fan 12 is installed at one end of the radiator 11, a radiating air duct is formed in the radiator, one end of the radiating air duct, where the fan is installed, is an air inlet 116, the other end of the radiating air duct is an air outlet 117, and the fan 12 blows towards the air inlet 116 to discharge heat in the radiating air duct from the air outlet 117 so as to accelerate heat dissipation. Because the radiator on the frequency converter is provided with the capacitor groove which extends into the radiating air duct, the capacitor tank is blown by a fan to directly cool the capacitor arranged in the capacitor tank, the relay, the transformer, the IGBT module and the MOS tube are in contact connection with the surface of the radiator to conduct the heat of the relay, the transformer, the IGBT module and the MOS tube to the radiator, the fan blows air to the heat dissipation air duct to reduce the temperature of the radiator, indirectly reduces the temperature of the relay, the transformer, the IGBT module and the MOS tube for heat dissipation, leads important heating elements arranged on the frequency converter to be connected with the radiator, compared with the prior art that only the IGBT module is connected with the radiator for radiating, the frequency converter achieves better radiating effect, effectively prolongs the service life and reduces the use cost of consumers.

Preferably, the radiator is die-cast aluminum, and is formed by die-casting, so that the radiator has good electric conductivity.

Further, the heat sink 11 is further provided with a shaft column 1110, and the driving board 3 and the capacitor board 4 are fixed above the heat sink 11 through the shaft column 1110.

Further, the drive board 3 has seted up the through-hole in the below of transformer, the bottom of transformer is connected with first heat conduction silica gel, first heat conduction silica gel passes the through-hole and is connected with the radiator contact to realize the transformer heat dissipation.

Further, still be provided with first heat dissipation boss 111, second heat dissipation boss 112, third heat dissipation boss 113 and radiating groove 114 on the radiator, first heat dissipation boss 111 is connected with the contact of IGBT module 33, second heat dissipation boss 112 is connected with MOS pipe 32 contact, third heat dissipation boss 113 is connected with transformer 31 contact through first heat conduction silica gel, relay 41 places in radiating groove 114, be provided with second heat conduction silica gel between relay 41 and the radiating groove 115, makes the relay pass through second heat conduction silica gel and is connected with the radiator contact.

The IGBT module is in direct contact with the first heat dissipation boss to enable heat to be conducted to the first heat dissipation boss, the MOS tube is in direct contact with the second heat dissipation boss to enable heat to be conducted to the second heat dissipation boss, the transformer is connected with first heat-conducting silica gel to enable the transformer to be in contact with the third heat dissipation boss through the first heat-conducting silica gel to enable heat to be conducted to the third heat dissipation boss, the relay is connected with second heat-conducting silica gel to enable the relay to conduct heat to the heat dissipation groove through the second heat-conducting silica gel. Relay, transformer, IGBT module and MOS pipe all contact with the radiator with heat conduction to the radiator on, through carrying out the heat dissipation of blowing to the radiator, make the temperature reduction of radiator reach the effect that makes relay, transformer, IGBT module and MOS pipe temperature reduction, prolong the life of relay, transformer, IGBT module and MOS pipe.

Further, a first heat dissipation fin 118 and a plurality of second heat dissipation fins 119 are arranged on the heat sink 11, a first heat dissipation air duct is formed between one side of the first heat dissipation fin 118 and the inner wall of one side of the heat sink 11, a second heat dissipation air duct is formed between the other side of the first heat dissipation fin 118 and the inner wall of the other side of the heat sink 11, and the plurality of second heat dissipation fins 119 are arranged in the second heat dissipation air duct in parallel.

The fan 12 is disposed at one end of the heat sink 11, and an air outlet of the fan is aligned with the first heat dissipation air channel and the second heat dissipation air channel for heat dissipation. The capacitor slot is located in the first heat dissipation air channel, the first heat dissipation air channel is used for conducting air blowing and heat dissipation on the capacitor, the relay, the transformer, the IGBT module and the MOS tube are in contact with the radiator and located above the second heat dissipation air channel, and the second heat dissipation air channel is used for conducting air blowing and heat dissipation on the relay, the transformer, the IGBT module and the MOS tube. And an independent heat dissipation air channel is formed between the adjacent second radiating fins, so that the heat dissipation of the second heat dissipation air channel is accelerated.

The bottom of radiator is provided with the screw hole, and the converter passes through screw fixed mounting on equipment for the convenient dismantlement of converter, and the heat dissipation wind channel of convenient clean up radiator, in order to guarantee the radiating effect of radiator.

Furthermore, a plurality of ventilation grooves are formed in the outer wall of the capacitor groove and used for heat dissipation of the capacitor, and therefore the heat dissipation of the accelerated capacitor is facilitated when the fan conducts blowing heat dissipation.

Further, still include sealing washer 5, sealing washer 5 is multilayer annular structure, sealing washer 5 suit is on condenser 42, makes between condenser 42 and the capacitor groove 115 sealing connection.

Through adopting the sealing washer to carry out the connecting portion between sealed capacitor and the electric capacity groove, make the space in first heat dissipation wind channel, the second heat dissipation wind channel and the shell keep apart, be favorable to using in the trade such as high moist, high greasy dirt, have high dust, cotton fibre, enlarge the application range of converter.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A frequency converter is characterized by comprising a shell, a heat dissipation component, a capacitor plate and a driving plate, the heat dissipation assembly comprises a fan and a heat sink, the capacitor plate and the driving plate are fixed on the heat sink in an overlapped manner, the driving board is positioned above the capacitor board, the shell covers the driving board and is connected with the radiator, the capacitor plate is provided with a relay and a capacitor, the driving plate is provided with a transformer, an IGBT module and an MOS tube, the radiator is provided with a capacitor groove, the capacitor is hermetically arranged in the capacitor groove, the relay, the transformer, the IGBT module and the MOS tube are in contact connection with the upper surface of the radiator, the radiator is provided with a heat dissipation air duct, the capacitor groove extends towards the direction of the heat dissipation air duct, the fan is fixed at one end of the heat dissipation air duct, and the fan conducts blowing heat dissipation towards the interior of the heat dissipation air duct by aiming at one end of the heat dissipation air duct.

2. The frequency converter according to claim 1, wherein the heat sink is further provided with a stud, and the driving board and the capacitor board are fixed above the heat sink through the stud.

3. The frequency converter according to claim 2, wherein the driving board has a through hole below the transformer, the transformer is connected with a first heat-conducting silica gel, and the first heat-conducting silica gel passes through the through hole to be in contact connection with the heat sink, so as to dissipate heat of the transformer.

4. The frequency converter according to claim 3, wherein the heat sink further comprises a first heat dissipating boss, a second heat dissipating boss, a third heat dissipating boss and a heat dissipating slot, the first heat dissipating boss is in contact with the IGBT module, the second heat dissipating boss is in contact with the MOS tube, the third heat dissipating boss is in contact with the transformer through the first heat conductive silica gel, the relay is disposed in the heat dissipating slot, and the second heat conductive silica gel is disposed between the relay and the heat dissipating slot to connect the relay with the heat sink through the second heat conductive silica gel.

5. The frequency converter according to claim 4, wherein the heat dissipation air duct comprises a first heat dissipation air duct and a second heat dissipation air duct.

6. The frequency converter according to claim 5, wherein a first heat sink and a plurality of second heat sinks are disposed on the heat sink, a first heat dissipation air channel is formed between one side of the first heat sink and an inner wall of one side of the heat sink, a second heat dissipation air channel is formed between the other side of the first heat sink and an inner wall of the other side of the heat sink, and the plurality of second heat sinks are disposed in parallel in the second heat dissipation air channel.

7. The frequency converter according to claim 6, wherein a plurality of ventilation slots are formed on the outer wall of the capacitor slot, and the ventilation slots are used for heat dissipation of the capacitor.

8. The frequency converter according to any one of claims 1 to 7, further comprising a sealing ring, wherein the sealing ring is of a multi-layer annular structure, and the sealing ring is sleeved on the capacitor so as to enable the capacitor to be connected with the capacitor tank in a sealing manner.