CN213403946U

CN213403946U - Heat radiation structure of motor controller

Info

Publication number: CN213403946U
Application number: CN202022388012.XU
Authority: CN
Inventors: 刘运峰
Original assignee: Zhongshan Broad Ocean Motor Co Ltd; Hubei Queen Ocean Electrical Appliance Manufacture Co Ltd
Current assignee: Zhongshan Broad Ocean Motor Co Ltd; Hubei Queen Ocean Electrical Appliance Manufacture Co Ltd
Priority date: 2020-10-24
Filing date: 2020-10-24
Publication date: 2021-06-08
Anticipated expiration: 2030-10-24

Abstract

The utility model discloses a heat radiation structure of a motor controller, which comprises a control box, a circuit board arranged in the control box, a plurality of IGBT elements and a heat radiator, wherein the plurality of IGBT elements are installed and electrically connected on the circuit board, the inner wall of the control box is a cambered surface, the outer side surface of the heat radiator is attached on the inner wall of the control box, the outer side surface of the heat radiator is a cambered surface so as to be better attached to the inner wall of the control box, the inner side surface of the heat radiator is provided with a plurality of grooves, the bottom surfaces of the grooves are planes, each IGBT element is embedded into the groove and attached to the bottom surface of the groove for contact heat radiation, the heat radiator can be used for installing a plurality of IGBT modules at one time, the effect of simultaneously radiating the plurality of IGBTs is realized, one heat radiator is used for carrying out pairing heat radiation on the plurality of IGBT modules, therefore, the production cost is reduced, the assembly process of the controller is simplified, the assembly difficulty is reduced, and the production efficiency is improved.

Description

Heat radiation structure of motor controller

The technical field is as follows:

the utility model relates to a machine controller's heat radiation structure.

Background art:

at present, in order to facilitate the use of a motor, a motor body and a controller are generally designed into an electromechanical integrated product, wherein the controller integrates modules such as a power circuit, electronic phase conversion, power inversion, signal processing and the like, and a power inversion unit generally adopts an IPM module or a discrete IGBT module. IPM modules are costly and have poor versatility, and discrete IGBT modules are generally used to solve the above problems. Because of its space limit, how reasonable realization IGBT overall arrangement and insulating heat dissipation seem especially crucial, and the most commonly used design of the radiating mode of present IGBT module is provided with the radiator in the controller, and the IGBT module is installed on the radiator, and the control box inner wall is hugged closely to the radiator, can refer to the utility model patent of bulletin number CN 202222092U, the patent name is a motor controller's IGBT heat radiation structure.

In the prior art, the structure of the radiator is generally a square or arc block, one radiator is mounted on the side surface of the radiator, at most two IGBT modules can be mounted on one radiator, the controller generally uses six or more IGBT modules which are sensitive to temperature, when reaching a certain temperature, the IGBT modules are easy to burn out and can lose effectiveness for the whole machine, therefore, in order to meet the heat dissipation requirements of a plurality of IGBT modules, a method of adding radiators is generally adopted, namely a plurality of radiators are spliced together to form a whole, the plurality of IGBT modules are subjected to paired heat dissipation, but the plurality of radiators are connected together, the heat dissipation degree of the radiators cannot reach the best effect, and a plurality of radiators are matched with the IGBTs, namely a plurality of radiators are required to be manufactured, so that the production cost is increased, in addition, the splicing of the plurality of radiators is more integrated, the assembly precision and the process are more detailed, making the assembly of the controller complicated and cumbersome.

The invention content is as follows:

the utility model aims at providing a machine controller's heat radiation structure can solve the needs among the prior art and realize pairing the heat dissipation to a plurality of IGBT modules with a plurality of radiator concatenations, makes the equipment process complicated, loaded down with trivial details, technical problem that manufacturing cost is high.

The purpose of the utility model is realized by the following technical scheme.

The utility model aims at providing a motor controller's heat radiation structure, including the control box, install the circuit board in the control box, a plurality of IGBT components with be used for the radiating radiator of IGBT component, a plurality of IGBT component installation electricity are connected on the circuit board, the inner wall of control box is the cambered surface, the lateral surface of radiator is pasted the dress at the inner wall of control box, the lateral surface of radiator is the cambered surface so that the inner wall of better laminating control box, the medial surface of radiator is provided with a plurality of recess, the bottom surface of recess is the plane, every IGBT component embedding recess pastes and carries out the contact heat dissipation by pasting in the bottom surface of recess.

Preferably, the bottom surfaces of two adjacent grooves form an included angle B, and the included angle B ranges from 160 degrees to 179 degrees.

Preferably, the radiator is installed on the support, and the support is installed on the circuit board, and the lateral surface of support is the cambered surface so that better laminating control box's inner wall.

Preferably, a positioning boss is convexly arranged on the outer side surface of the support towards the bottom direction of the support, the support is matched with the circuit board through the positioning boss, at least two first convex columns are convexly arranged on the bottom surface of the support, a first mounting hole matched with the first convex columns is formed in the circuit board, and the first convex columns are inserted into the first mounting hole to enable the support to be mounted on the circuit board.

Preferably, a plurality of gaps are formed in the inner side surface of the support, the pins of the IGBT element are embedded into the gaps, and the end parts of the pins of the IGBT element are inserted into the insertion holes formed in the circuit board.

Preferably, the top surface of the support is convexly provided with a plurality of bearing bosses, the radiator is supported on the bearing bosses, the end faces of the two bearing bosses are convexly provided with second convex columns, the radiator is provided with a second mounting hole matched with the second convex columns, and the second convex columns are inserted into the second mounting hole to enable the radiator to be mounted on the support.

Preferably, two adjacent grooves are separated by a spacer.

Preferably, a first screw hole is formed in the middle of the bottom surface of the groove, and the IGBT element is screwed and locked on the bottom surface of the groove through the first screw and the first screw hole.

Preferably, an insulating heat-conducting silicon sheet for isolating the heat radiator from the control box is arranged between the heat radiator and the control box.

Preferably, a third mounting hole is formed in the upper portion of the bottom surface of each of the two grooves, an insulating heat-conducting silica gel sleeve is embedded in the third mounting hole, the radiator and the control box are locked together through a second screw, and the second screw sequentially penetrates through the side wall of the control box and the insulating heat-conducting silica gel sheet to be in threaded connection with the insulating heat-conducting silica gel sleeve, so that the radiator is locked on the side wall of the control box.

Preferably, the insulating and heat-conducting silica gel sleeve comprises a clamping plate and a connecting boss protruding from the end face of the clamping plate, the clamping plate is clamped on the bottom face of the groove, the connecting boss is embedded into the third mounting hole, and a second screw hole used for being in threaded connection with a second screw is formed in the connecting boss.

Compared with the prior art, the utility model, following effect has:

1) the medial surface of radiator is provided with a plurality of recess, the bottom surface of recess is the plane, every IGBT component embedding recess pastes and leans on and carries out the contact heat dissipation at the bottom surface of recess, make the radiator once only can install a plurality of IGBT components, a plurality of IGBT components radiating effect simultaneously has been realized, use a radiator to pair the heat dissipation to a plurality of IGBT component, can reduce the temperature rise of controller and motor simultaneously, make the good performance operation of complete machine, and, this radiator is integrated into one piece, can reduce the equipment part number of controller, thereby reduction in production cost, the recess can the accurate positioning IGBT component, the equipment process of simplified controller, reduce the equipment degree of difficulty, and the production efficiency is improved.

2) Other advantages of the present invention will be described in detail in the examples section.

Description of the drawings:

fig. 1 is a perspective view provided by the present invention;

fig. 2 is an exploded view provided by the present invention;

FIG. 3 is a front view provided by the present invention;

FIG. 4 is a cross-sectional view A-A provided for FIG. 3;

fig. 5 is a schematic structural diagram of the heat sink, the IGBT element, the bracket, and the circuit board provided by the present invention;

FIG. 6 is an exploded view provided for FIG. 5;

fig. 7 is an exploded schematic view of the heat sink set IGBT element provided by the present invention;

FIG. 8 is a front view provided for FIG. 7;

FIG. 9 is a cross-sectional view B-B provided for FIG. 8;

FIG. 10 is a cross-sectional view C-C provided for FIG. 8;

fig. 11 is a top view of the heat sink provided by the present invention;

fig. 12 is a perspective view of a bracket provided by the present invention;

fig. 13 is a perspective view of another angle of the bracket provided by the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the following detailed description of preferred embodiments and accompanying drawings.

As shown in fig. 1 to 13, the present embodiment provides a heat dissipation structure of a motor controller, including a control box 1, a circuit board 2 installed in the control box 1, a plurality of IGBT elements 3, and a heat sink 4 for dissipating heat of the IGBT elements 3, the IGBT elements 3 are installed and electrically connected on the circuit board 2, an inner wall of the control box 1 is an arc surface, an outer side surface 40a of the heat sink 4 is attached to the inner wall of the control box 1, an outer side surface 40a of the heat sink 4 is an arc surface to better fit the inner wall of the control box 1, the cover heat sink 4 is integrally formed by an aluminum material, an inner side surface 40b of the heat sink 4 is provided with at least six grooves 41, the number of the IGBT elements 3 is equal to the number of the grooves 41, a bottom surface 412 of the groove 41 is a plane, each IGBT element 3 is embedded in the groove 41 and abuts against the bottom surface 412 of the groove 41 for contact heat dissipation, so, the effect that a plurality of IGBTs radiate heat simultaneously is realized, a radiator 4 is used for pairing a plurality of IGBT modules for radiating heat, the temperature rise of a controller and a motor can be reduced, the performance of the whole machine is enabled to run well, in addition, the radiator 4 is integrally formed, the number of assembling parts of the controller can be reduced, the production cost is reduced, the IGBT elements can be accurately positioned by the grooves 41, the assembling process of the controller is simplified, the assembling difficulty is reduced, and the production efficiency is improved.

The bottom surfaces of two adjacent grooves 41 form an included angle B, the value range of the included angle B is 160-179 degrees, the design is reasonable, and the distribution of the grooves 41 is convenient.

This radiator 4 installs on support 5, and support 5 installs on circuit board 2, and the lateral surface of support 5 is the cambered surface so that the inner wall of better laminating control box 1, installs radiator 4, IGBT component 3 and support 5 together earlier, thinks into an overall subassembly, then installs this overall subassembly on circuit board 2, can simplify the equipment process of controller, practices thrift the equipment time, improves production efficiency.

The convex location boss 51 that is provided with of outside surface toward the bottom direction of support 5 at support 5, support 5 is through this location boss 51 and this circuit board 2 cooperation, the convex first projection 52 that is provided with two at least circumference intervals and sets up on the bottom surface of support 5, set up on the circuit board 2 with first projection 52 complex first mounting hole 21, first projection 52 cartridge makes support 5 install on circuit board 2 in first mounting hole 21, moreover, the steam generator is simple in structure, the location is convenient, and the installation is convenient.

The inner side surface of the bracket 5 is provided with a plurality of gaps 55, the pins 31 of the IGBT element 3 are embedded in the gaps 55, the end parts of the pins 31 of the IGBT element 3 are inserted into the insertion holes 22 formed in the circuit board 2, the gaps 55 play a role in positioning and guiding the pins 31 of the IGBT element 3, the pins 31 of the IGBT element 3 are prevented from being easily deflected when being collided, in addition, the pins 31 of the IGBT element 3 are positioned by adopting the gaps 55, so that the pins 31 of the IGBT element 3 and the insertion holes 22 in the circuit board 2 are more accurately installed, and the installation efficiency of the IGBT element 3 and the circuit board 2 is effectively improved.

The protrusion is provided with the bearing boss 53 that at least three circumference interval set up on the top surface of support 5, radiator 4 bearing is on this bearing boss 53, central point at wherein two bearing boss 53's terminal surface puts the protrusion and is provided with second projection 54, set up on radiator 4 with this second projection 54 complex second mounting hole 42, second projection 54 cartridge makes radiator 4 install on support 5 in second mounting hole 42, moreover, the steam generator is simple in structure, the simple installation is swift, and bearing boss 53 makes and leaves the clearance between radiator 4 bottom surface and the support 5 top surface, guarantee radiator 4 circulation of air all around, make radiator 4's radiating effect can not influenced.

Two adjacent grooves 41 are separated by a spacer 6, so that two adjacent IGBT elements 3 cannot interfere in installation, a clearance groove is formed in the angular position of each groove 41, the angular position of each IGBT element is prevented from interfering with the angular position of each groove 41 in the installation of the IGBT elements, and the IGBT elements 3 are conveniently installed.

A first screw hole 410 is formed in the middle of the bottom surface 412 of the recess 41, and the IGBT element 3 is screwed and locked to the bottom surface of the recess 41 by a first screw 7 and the first screw hole 410. The mounting mode is simple, easy dismounting.

The insulating heat-conducting silica gel sheet 8 used for isolating the radiator 4 from the control box 1 is arranged between the radiator 4 and the control box 1, so that the control box 1 is ensured to have good insulating property on the premise of not influencing the heat dissipation effect of the radiator 4, and the safety of the controller in use is improved.

A third mounting hole 411 is formed in the upper position of the bottom surfaces of the two grooves 41, an insulating heat-conducting silica gel sleeve 10 is embedded in the third mounting hole 411, the heat radiator 4 and the control box 1 are locked together through a second screw 9, the second screw 9 sequentially penetrates through the side wall of the control box 1, and an insulating heat-conducting silica gel sheet 8 is in threaded connection with the insulating heat-conducting silica gel sleeve 10, so that the heat radiator 4 is locked on the side wall of the control box 1.

This insulating heat conduction silica gel cover 10 includes a cardboard 101 and the connection boss 102 of protrusion setting on following cardboard 101 terminal surface, and cardboard 101 card is on recess 41 bottom surface, connects in boss 102 embedding third mounting hole 411, offers on connecting boss 102 to be used for with the second screw 1021 of second screw 9 spiro union, simple structure, and reasonable in design can ensure the stability that radiator 4 and control box 1 are connected.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement modes, and are all included in the scope of the present invention.

Claims

1. The utility model provides a machine controller's heat radiation structure, including control box (1), install circuit board (2) in control box (1), a plurality of IGBT components (3) and be used for radiating radiator (4) of IGBT components (3), a plurality of IGBT components (3) installation electricity is connected on circuit board (2), the inner wall of control box (1) is the cambered surface, the inner wall in control box (1) is pasted in lateral surface (40a) subsides of radiator (4), lateral surface (40a) of radiator (4) are the cambered surface so that the inner wall of better laminating control box (1), its characterized in that: a plurality of grooves (41) are formed in the inner side face (40b) of the radiator (4), the bottom faces (412) of the grooves (41) are flat, and each IGBT element (3) is embedded into each groove (41) and attached to the bottom face of each groove (41) to conduct contact type heat dissipation.

2. The heat dissipation structure of a motor controller according to claim 1, wherein: the bottom surfaces of two adjacent grooves (41) form an included angle B, and the included angle B ranges from 160 degrees to 179 degrees.

3. The heat dissipation structure of a motor controller according to claim 1 or 2, wherein: radiator (4) install on support (5), support (5) are installed on circuit board (2), the lateral surface of support (5) is the cambered surface so that better laminating control box (1) inner wall.

4. The heat dissipation structure of a motor controller according to claim 3, wherein: the outer side surface of the support (5) is provided with a positioning boss (51) in a protruding mode towards the bottom of the support (5), the support (5) is matched with the circuit board (2) through the positioning boss (51), the bottom surface of the support (5) is provided with at least two first convex columns (52) in a protruding mode, a first mounting hole (21) matched with the first convex column (52) is formed in the circuit board (2), and the first convex column (52) is inserted into the first mounting hole (21) to enable the support (5) to be mounted on the circuit board (2).

5. The heat dissipation structure of a motor controller according to claim 4, wherein: a plurality of gaps (55) are formed in the inner side face of the support (5), the pins (31) of the IGBT element (3) are embedded into the gaps (55), and the end parts of the pins (31) of the IGBT element (3) are inserted into the insertion holes (22) formed in the circuit board (2).

6. The heat dissipation structure of a motor controller according to claim 5, wherein: the heat radiator is characterized in that a plurality of bearing bosses (53) are convexly arranged on the top surface of the support (5), the heat radiator (4) is supported on the bearing bosses (53), second convex columns (54) are convexly arranged on the end surfaces of the two bearing bosses (53), second mounting holes (42) matched with the second convex columns (54) are formed in the heat radiator (4), and the second convex columns (54) are inserted in the second mounting holes (42) to enable the heat radiator (4) to be mounted on the support (5).

7. The heat dissipation structure of a motor controller according to claim 2, wherein: two adjacent grooves (41) are separated by a spacer block (6).

8. The heat dissipation structure of a motor controller according to claim 7, wherein: a first screw hole (410) is formed in the middle of the bottom surface (412) of the groove (41), and the IGBT element (3) is screwed and locked on the bottom surface of the groove (41) through a first screw (7) and the first screw hole (410).

9. The heat dissipation structure of a motor controller according to claim 8, wherein: an insulating heat-conducting silica gel sheet (8) used for isolating the radiator (4) and the control box (1) is arranged between the radiator (4) and the control box (1).

10. The heat dissipation structure of a motor controller according to claim 9, wherein: a third mounting hole (411) is formed in the upper portion of the bottom face of each of the two grooves (41), an insulating heat-conducting silica gel sleeve (10) is embedded in the third mounting hole (411), the radiator (4) and the control box (1) are locked together through second screws (9), and the second screws (9) sequentially penetrate through the side wall of the control box (1) and the insulating heat-conducting silica gel sheet (8) and are in threaded connection with the insulating heat-conducting silica gel sleeve (10), so that the radiator (4) is locked on the side wall of the control box (1).

11. The heat dissipation structure of a motor controller according to claim 10, wherein: this insulating heat conduction silica gel cover (10) includes a cardboard (101) and connects boss (102) from the protruding setting on cardboard (101) terminal surface, and cardboard (101) card is on recess (41) bottom surface, connects in boss (102) embedding third mounting hole (411), offers second screw (1021) that are used for with second screw (9) spiro union on connecting boss (102).