CN116365792A

CN116365792A - Motor heat radiation structure based on vapor chamber and phase change heat pipe

Info

Publication number: CN116365792A
Application number: CN202310271526.2A
Authority: CN
Inventors: 尹树彬; 汤勇; 黄皓熠; 黎洪铭; 赵威; 张仕伟; 黄梓滨; 余小媚
Original assignee: Guangdong Changnengda Technology Development Co ltd
Current assignee: Guangdong Changnengda Technology Development Co ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-06-30

Abstract

The invention provides a motor heat dissipation structure based on a soaking plate and a phase-change heat pipe, which comprises a plurality of through grooves formed in the outer surface of a stator core, wherein the soaking plate is arranged on the through grooves and comprises an I-shaped soaking plate and/or an L-shaped soaking plate, the motor heat dissipation structure also comprises the phase-change heat pipe arranged at the end part of a winding, and the winding is connected with the stator core. According to the invention, a plurality of through grooves are formed on the outer surface of the stator core according to the actual heat dissipation requirement of the motor, the I-shaped soaking plate or the L-shaped soaking plate is installed, or the soaking plates with two shapes are installed at the same time, through the use of the through grooves matched with the soaking plates and the arrangement of the phase change heat pipes at the winding end parts, the temperature of the winding of the overhanging part can be effectively reduced and the heat dissipation efficiency of the stator core of the motor can be further improved while the heat dissipation structure volume of the stator core is saved.

Description

Motor heat radiation structure based on vapor chamber and phase change heat pipe

Technical Field

The invention relates to the field of motor heat dissipation, in particular to a motor heat dissipation structure based on a vapor chamber and a phase change heat pipe.

Background

The motor is an electric component for mutually converting electric energy and mechanical energy, and when the electric energy is converted into the mechanical energy, the motor shows the working characteristics of the motor; when the mechanical energy is converted to electrical energy, the motor exhibits the operating characteristics of a generator. Compared with other types of motors, the permanent magnet synchronous motor has the greatest advantages of higher power density and torque density, and compared with other types of motors with the same mass and volume, the permanent magnet synchronous motor can provide the maximum power output and acceleration for new energy automobiles. The permanent magnet synchronous motor is the main reason for being the first choice in the new energy automobile industry with extremely high space and dead weight requirements. However, the permanent magnet material on the rotor has the defects that the permanent magnet material on the rotor can generate the phenomenon of magnetic decay under the conditions of high temperature, vibration and overcurrent, so that the motor is easy to damage. Therefore, heat dissipation is an important factor for limiting the ultimate power of the permanent magnet synchronous motor. At present, air cooling and liquid cooling are mainstream motor heat dissipation technologies, and the principle of the technology is that a motor copper wire winding transmits heat to a liquid cooling shell through an insulating layer, a stator core and the like, and then air or liquid working medium dissipates the heat.

However, most of the existing stator core materials are silicon steel sheets, and the heat conductivity is only 40W/M.K, so that the wrapped winding cannot realize efficient heat dissipation. Meanwhile, the existing air cooling and liquid cooling only can realize heat dissipation of windings of the wrapping part of the stator core, the heat of copper wire windings exposed outside the core cannot be effectively dissipated, and the temperature of the copper wire of the part becomes an important index for measuring whether the motor reaches the protection temperature. Therefore, the reduction of the temperature of the overhanging part winding and the improvement of the heat dissipation efficiency of the motor stator core are of great significance for realizing the efficient heat dissipation and power improvement of the motor.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a motor heat dissipation structure based on a vapor chamber and a phase change heat pipe, which can effectively reduce the temperature of a winding at a overhanging part and improve the heat dissipation efficiency of a motor stator core, thereby further improving the heat dissipation efficiency of a motor.

The technical scheme of the invention is realized as follows:

the utility model provides a motor heat radiation structure based on vapor chamber and phase transition heat pipe, includes that a plurality of is seted up in the logical groove of stator core surface, install the vapor chamber on the logical groove, the vapor chamber includes I type vapor chamber and/or L type vapor chamber, still including the phase transition heat pipe of locating the winding head, the winding is connected with stator core.

Preferably, the depth of the through slot is 20-50% of the thickness of the stator core.

Preferably, the width of the through groove is 100-110% of the thickness of the vapor chamber.

Preferably, the through groove is formed along the axial direction of the stator core.

Preferably, the through groove comprises a first through groove and a second through groove, and the first through groove and the second through groove are arranged at intervals.

Preferably, the I-shaped soaking plate is arranged in the first through groove, the short plate of the L-shaped soaking plate is arranged in the second through groove, and the long plate is in contact connection with the outer surface of the stator core.

Preferably, the heat spreader further comprises a shell through groove arranged on the shell, the shell through groove corresponds to the first through groove in position, and the I-shaped heat spreader is arranged in the shell through groove and the first through groove.

Preferably, the longitudinal section area of the I-shaped vapor chamber is 90-100% of the longitudinal section area of the through groove of the shell.

Preferably, the width of the L-shaped soaking plate is 80-100% of the axial length of the stator core.

Preferably, heat-conducting glue is filled between the vapor chamber and the through groove.

Compared with the prior art, the invention has the following advantages:

because the soaking plate has the characteristic of better heat transfer, a plurality of through grooves can be formed on the outer surface of the stator core according to the heat dissipation requirement of an actual motor, the I-type soaking plate or the L-type soaking plate is installed, or the soaking plates with two shapes are installed at the same time, and through the use of the through grooves matched with the soaking plate on the stator core, the heat dissipation efficiency of the stator core can be ensured while the heat dissipation structure volume of the stator core is saved; when the winding part is suspended outside the stator core, the phase-change heat pipe connected with the winding end part can conduct heat of the winding suspended part and heat of the edge part of the stator core, so that the heat transfer efficiency of the stator core and the winding is remarkably improved, the power of the motor can be improved, and meanwhile, the cost is reduced to a certain extent.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of the whole structure of the present invention when the present invention is disposed in a casing;

FIG. 2 is a schematic diagram of a stator of an electric motor according to the present invention;

FIG. 3 is a front view of the type I soaking plate in the present invention;

FIG. 4 is a right side view of the type I soaking plate in the present invention;

FIG. 5 is a front view of an L-shaped soaking plate according to the present invention;

FIG. 6 is a right side view of the L-shaped soaking plate in the present invention;

FIG. 7 is a front view of a phase change heat pipe according to the present invention;

FIG. 8 is a right side view of a phase change heat pipe according to the present invention;

FIG. 9 is a schematic perspective view of a partial structure of the present invention;

FIG. 10 is a schematic view showing a partial structure of embodiment 1 of the present invention;

FIG. 11 is a schematic view showing a partial structure of embodiment 2 of the present invention;

fig. 12 is a schematic partial structure of embodiment 3 of the present invention.

The attached drawings are identified: the heat-insulating material comprises a 1-shell, a 11-shell cooling channel, a 12-shell through groove, a 2-winding, a 3-stator core, a 31-through groove, a 311-first through groove, a 312-second through groove, a 4-phase change heat pipe, a 5-vapor chamber, a 51-I type vapor chamber and a 52-L type vapor chamber.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-10, the embodiment of the invention discloses a motor heat dissipation structure based on a soaking plate and a phase-change heat pipe, which comprises a plurality of through grooves 31 formed in the outer surface of a stator core 3, wherein the soaking plate 5 is installed on the through grooves 31, the soaking plate 5 comprises an I-type soaking plate 51 and/or an L-type soaking plate 52, the motor heat dissipation structure further comprises a phase-change heat pipe 4 arranged at the end part of a winding 2, and the winding 2 is connected with the stator core 3. When in use, the motor stator is arranged inside the shell 1, the motor stator comprises a stator core 3 and a winding 2, and the winding 2 is connected with the stator core 3.

Referring to fig. 3-8, specifically, since the soaking plate 5 has a better heat transfer characteristic, a plurality of through grooves 31 can be formed on the outer surface of the stator core 3 according to the actual heat dissipation requirement of the motor, and an I-type soaking plate 51 or an L-type soaking plate 52 or soaking plates with two shapes are installed at the same time, and through the use of the soaking plate 5 in cooperation with the through grooves 31 formed on the stator core 3, the heat dissipation efficiency of the stator core 3 can be ensured while the heat dissipation structure volume of the stator core 3 is saved; preferably, the phase-change heat pipe 4 is an annular phase-change heat pipe, the annular phase-change heat pipe has the advantages of lower cost, simple manufacture and ultrahigh heat conductivity in all directions, and because the stator core 3 is annular in shape and the winding 2 is connected with the stator core 3, the annular phase-change heat pipe is arranged at the end part of the winding 2, and the winding 2 is partially suspended outside the stator core 3, the phase-change heat pipe 4 can also conduct the heat of the part (the suspended part of the winding 2 and the edge part of the stator core 3), so that the heat transfer efficiency of the stator core 3 and the winding 2 is obviously improved, the power of the motor can be improved, the cost is reduced to a certain extent, and the phase-change heat pipe is applicable to an air-cooled motor or a liquid-cooled motor.

The description is made with reference to fig. 7 to 8, in which R3 is the outer radius of the winding 2, R4 is the inner radius of the casing 1, and B is the width of the overhanging portion of the winding 2. And bending and forming the phase-change heat pipe 4 by adopting a die or a bending machine, and customizing designs and manufacturing motors with different sizes. If the length of the phase-change heat pipe 4 is insufficient, two or more folded phase-change heat pipes 4 can be spliced into an annular corrugated ultrathin phase-change device belt.

Further, the depth of the through slot 31 is 20-50% of the thickness of the stator core 3. Because the winding 2 is tightly connected with the stator core 3, when the through groove 31 is formed in the stator core 3, in order to ensure the structural strength of the stator core 3 and enable the soaking plate 5 to be closer to the winding 2, the through groove 31 is preferably milled to a depth of 20-50% of the thickness of the stator core 3, and the depth can ensure that the soaking plate 5 is stably erected inside the through groove 31 and simultaneously ensure the structural strength of the stator core 3. And the number and depth of the through grooves can be set for motors of different sizes.

Further, the width of the through groove 31 is 100-110% of the thickness of the soaking plate 5. At this ratio, smooth fitting of the soaking plate 5 in the through groove 31 can be ensured.

Further, the through groove 31 is opened along the axial direction of the stator core 3. The through groove 31 in the direction can save the milling cost and reduce the use area of the vapor chamber 5.

Further, the through groove 31 includes a first through groove 311 and a second through groove 312, and the first through groove 311 and the second through groove 312 are spaced apart from each other. Specifically, the plurality of first through slots 311 are a group of north, south, east and west slots arranged in the stator core 3, the plurality of second through slots 312 are a group of slots arranged between the two groups of first through slots 311, and as a preferred arrangement and combination mode, the plurality of first through slots 311 may be a group of 3 slots, and the plurality of 2 slots 312 may be a group of slots.

Specifically, when the heat dissipation structure is applied to a liquid cooling motor, the liquid cooling housing of the liquid cooling motor includes a plurality of housing cooling channels 11, the first through slots 311 (the radial direction is the depth direction of the first through slots 311) are milled in the radial direction at the gaps between the adjacent 2 housing cooling channels 11 of the stator core 3, and the number and the size of the first through slots 311 are formulated according to the gap width.

Further, the I-shaped soaking plate 51 is disposed in the first through slot 311, the short plate of the L-shaped soaking plate 52 is disposed in the second through slot 312, and the long plate is in contact connection with the outer surface of the stator core 3.

Further, the heat spreader further comprises a case through groove 12 arranged on the case 1, the case through groove 12 corresponds to the first through groove 311, and the I-shaped heat spreader 51 is installed in the case through groove 12 and the first through groove 311. Preferably, the housing through groove 12 has the same longitudinal cross-sectional dimension as the first through groove 311.

As further described with reference to fig. 3-4, the longitudinal cross-sectional area of the I-shaped soaking plate 51 is 90-100% of the longitudinal cross-sectional area of the casing through groove 12. The problem that the I-shaped soaking plate 51 is deformed or fails to be assembled due to overlarge friction during assembly is avoided.

Preferably, when the heat dissipation structure is applied to a liquid cooling motor, the height of the I-shaped soaking plate 51 can be appropriately larger than the total height from the outer surface of the liquid cooling shell to the bottom of the first through groove 311 on the stator core 3, i.e. the I-shaped soaking plate 51 can extend out of the liquid cooling shell in the past, so as to play a role in enhancing convection heat exchange by fins.

Further, the width of the L-shaped soaking plate 52 is 80-100% of the axial length of the stator core 3. 5-6, where R1 is the outer radius of the stator core 3, R2 is the inner radius of the casing 1, L is the length of the evaporation section of the L-shaped soaking plate 52 contacting the stator core 3 (i.e. the short plate of the L-shaped soaking plate 52), and its size is smaller than or equal to the depth of the through slot 31 on the outer surface of the stator core 3, and the size structure of the L-shaped soaking plate 52 can avoid the problem that the L-shaped soaking plate 52 deforms or fails to assemble due to processing errors during assembly.

Further, a heat-conducting glue is filled between the soaking plate 5 and the through groove 31. Specifically, when the soaking plate 5 is mounted in the through slot 31, heat conducting glue needs to be poured into the through slot 31 first, and then the soaking plate 5 is mounted in the through slot 31 before the heat conducting glue is solidified, so that the soaking plate 5 can be fully contacted with the stator core 3, and the mounting is more stable. Preferably, the heat-conducting glue can be replaced by other heat-conducting interface materials, such as heat-conducting mud, etc.

Preferably, for the L-shaped soaking plate 52, the heat conducting glue is poured into the second through-slot 312 first, then the L-shaped soaking plate 52 is assembled on the second through-slot 312 before the heat conducting glue is solidified so as to be fully contacted with the stator core 3, and after the heat conducting glue is solidified, the motor stator embedded with the L-shaped soaking plate 52 is assembled in the casing 1, and the L-shaped soaking plate 52 can be fully contacted with the casing 1 and the stator core 3 at the same time. When the stator core is installed in a liquid-cooled motor, the first through grooves 311 on the outer surface of the stator core 3 are in one-to-one correspondence with the through groove positions of the stator core 3 relative to the gap of the cooling channel 11 of the casing.

Preferably, for the I-type soaking plate 51, the heat conducting glue is poured into the casing through groove 12 first, and then the I-type soaking plate 51 is inserted from the casing through groove 12 until the I-type soaking plate is completely matched with the first through groove 311 on the outer surface of the stator core 3 before the heat conducting glue is solidified, so that the I-type soaking plate 51 can be fully contacted with the casing 1 and the stator core 3 at the same time.

Example 1

Referring to fig. 10, as a preferred embodiment, only the phase-change heat pipe 4, the I-shaped soaking plate 51 and the through groove 31 are used to cooperate as a heat dissipation structure, the I-shaped soaking plate 51 is arranged in the through groove 31, and the phase-change heat pipe 4 is an annular phase-change heat pipe and is arranged at the end part of the winding 2. The heat dissipation scheme can ensure the heat dissipation efficiency of the stator core 3, obviously improve the heat transfer efficiency of the stator core 3 and the winding 2, and reduce the cost to a certain extent while improving the use power of the motor.

Example 2

Referring to fig. 11, as a preferred embodiment, only the phase change heat pipe 4, the L-shaped soaking plate 52 and the through groove 31 are used as a heat radiation structure scheme. In this structure, the L type soaking plate 52 is arranged in the through groove 31, the phase change heat pipe 4 is an annular phase change heat pipe and is arranged at the end part of the winding 2, the heat dissipation efficiency of the stator core 3 can be ensured by the heat dissipation scheme, the heat transfer efficiency of the stator core 3 and the winding 2 is obviously improved, and the cost is reduced to a certain extent while the power of the motor is improved.

Example 3

Referring to fig. 12, as a preferred embodiment, a heat dissipation structure scheme is used in which the phase-change heat pipe 4, the I-shaped soaking plate 51, and the L-shaped soaking plate 52 are all mated with the through groove 31. In this structure, the I-shaped soaking plate 51 is arranged in the first through groove 311, the L-shaped soaking plate 52 is arranged in the second through groove 312, the phase-change heat pipe 4 is an annular phase-change heat pipe and is arranged at the end part of the winding 2, and the heat dissipation scheme can ensure the heat dissipation efficiency of the stator core 3, obviously improve the heat transfer efficiency of the stator core 3 and the winding 2, and improve the use power of the motor.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. The utility model provides a motor heat radiation structure based on vapor chamber and phase transition heat pipe, its characterized in that, including a plurality of offer in logical groove (31) of stator core (3) surface, install vapor chamber (5) on logical groove (31), vapor chamber (5) include I type vapor chamber (51) and/or L type vapor chamber (52), still including locating phase transition heat pipe (4) of winding (2) tip, winding (2) are connected with stator core (3).

2. The motor heat dissipation structure based on the vapor chamber and the phase change heat pipe according to claim 1, wherein the depth of the through groove (31) is 20-50% of the thickness of the stator core (3).

3. The motor heat dissipation structure based on the vapor chamber and the phase change heat pipe according to claim 1, wherein the width of the through groove (31) is 100-110% of the thickness of the vapor chamber (5).

4. The motor heat dissipation structure based on the vapor chamber and the phase change heat pipe according to claim 1, wherein the through groove (31) is formed along the axial direction of the stator core (3).

5. The motor heat dissipation structure based on a vapor chamber and a phase-change heat pipe according to claim 4, wherein the through groove (31) comprises a first through groove (311) and a second through groove (312), and the first through groove (311) and the second through groove (312) are arranged at intervals.

6. The motor heat dissipation structure based on the vapor chamber and the phase change heat pipe according to claim 5, wherein the I-shaped vapor chamber (51) is arranged in the first through groove (311), the short plate of the L-shaped vapor chamber (52) is arranged in the second through groove (312), and the long plate is in contact connection with the outer surface of the stator core (3).

7. The motor heat dissipation structure based on a soaking plate and a phase-change heat pipe according to claim 6, further comprising a housing through groove (12) arranged on the housing (1), wherein the housing through groove (12) corresponds to the first through groove (311), and the I-shaped soaking plate (51) is installed in the housing through groove (12) and the first through groove (311).

8. The motor heat dissipation structure based on the vapor chamber and the phase change heat pipe as claimed in claim 7, wherein the longitudinal section area of the I-shaped vapor chamber (51) is 90-100% of the longitudinal section area of the casing through groove (12).

9. The motor heat dissipation structure based on the soaking plate and the phase change heat pipe according to claim 1, wherein the width of the L-shaped soaking plate (52) is 80-100% of the axial length of the stator core (3).

10. The motor heat dissipation structure based on the vapor chamber and the phase change heat pipe according to claim 1, wherein heat conducting glue is filled between the vapor chamber (5) and the through groove (31).