CN211239470U - High-power-density high-speed permanent magnet synchronous motor cooling structure - Google Patents
High-power-density high-speed permanent magnet synchronous motor cooling structure Download PDFInfo
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- CN211239470U CN211239470U CN202020263111.2U CN202020263111U CN211239470U CN 211239470 U CN211239470 U CN 211239470U CN 202020263111 U CN202020263111 U CN 202020263111U CN 211239470 U CN211239470 U CN 211239470U
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Abstract
The utility model discloses a high power density high speed permanent magnet synchronous motor cooling structure relates to the motor field. The cooling structure of the existing permanent magnet synchronous motor is difficult to meet the cooling requirement of a high-power-density high-speed permanent magnet synchronous motor. The utility model discloses set up the isolating ring in the stator inboard of motor, form the isolated cavity around the stator, set up the axial in-groove liquid cooling groove that runs through the iron core in stator core's intertooth space, the in-groove liquid cooling groove is kept apart with stator coil through the in-groove insulator, sets up the liquid cooling medium passageway that the axial runs through on stator core's the periphery wall, sets up the liquid cooling on the casing and imports and exports so that cooling medium gets into and flows the isolated cavity. Utilize liquid cooling medium's mobility, liquid cooling medium is direct to contact with high-speed permanent-magnet machine's stator coil and stator core, directly flows in stator core is inside, can take the motor outside with the heat that stator core and stator coil produced from the motor is inside to reduce the whole temperature of motor.
Description
Technical Field
The invention relates to the field of motors, in particular to a high-power-density high-speed permanent magnet synchronous motor cooling structure.
Background
Because the high-speed permanent magnet synchronous motor with high power density is applied more and more widely in the industries of petroleum, war industry, aerospace and the like, the performance requirement of the high-speed permanent magnet synchronous motor is higher and higher, and the cooling structure of the existing permanent magnet synchronous motor is difficult to meet the cooling requirement of the high-speed permanent magnet synchronous motor with high power density.
Disclosure of Invention
The technical problem to be solved and the technical task provided by the invention are to perfect and improve the prior technical scheme, and provide a high-power-density high-speed permanent magnet synchronous motor cooling structure, so as to improve the cooling effect of the high-speed permanent magnet synchronous motor. Therefore, the invention adopts the following technical scheme.
A high-power density high-speed permanent magnet synchronous motor cooling structure comprises a casing, a stator located on the inner side of the casing, a rotor located on the inner side of the stator, a left end cover and a right end cover located on the left end and the right end of the casing, wherein the left end cover and the right end cover are connected and sealed with the casing in a matching manner, the stator comprises a stator core and a stator coil, the stator core comprises a yoke part located on the outer side and a radial tooth part located on the inner side, the stator coil is wound on the tooth part through an inter-tooth groove, an open groove opening is formed in the inner side of the inter-tooth groove, an isolating ring is arranged between the rotor and the stator, the left end and the right end of the isolating ring are respectively connected and fixed with the left end cover and the right end cover and are sealed to form an isolated cavity around the stator, the left cavity of the stator core and the right cavity on the right side of the stator core, and, the 2 liquid cooling inlet and outlet are respectively communicated with the left cavity and the right cavity, and the yoke part of the stator core is surrounded with a liquid cooling medium channel which runs through the left cavity and the right cavity. Design isolated cavity between the stator and the rotor of motor, avoid cooling medium and rotor contact to cause harmful effects, and utilize liquid cooling medium's mobility, liquid cooling medium is direct to contact with high-speed permanent-magnet machine's stator coil and stator core, can bring the heat that stator core and stator coil produced outside the motor from the motor is inside, the effectual reduction is because the iron loss that stator core produced and the direct current copper loss that stator coil produced and the temperature that the alternating current copper consumed, thereby reduce the motor bulk temperature, and then can improve the power density and the torque of motor, promote high-speed permanent-magnet synchronous machine's cooling effect, promote the motor performance.
As a preferable technical means: the right side of left end cover and the left side of right end cover respectively be equipped with a cavity extension annular, two cavity extension annular are adjacent with the left and right ends of stator coil respectively. The cavity spaces of the left side and the right side of the stator coil are effectively enlarged, and the cooling effect is better.
As a preferable technical means: the inner side walls of the two cavity expansion ring grooves are respectively provided with a surrounding first sealing ring groove, a first O-shaped sealing ring is arranged in the first sealing ring grooves, and the isolating ring is connected and fixed on the inner side walls of the cavity expansion ring grooves and compresses the first O-shaped sealing rings. The sealing of the inner side of the isolated cavity is effectively realized.
As a preferable technical means: and the left end cover and the right end cover respectively press the second O-shaped sealing rings at the joints with the machine shell. The sealing outside the isolated cavity is effectively realized.
As a preferable technical means: the liquid cooling medium channel is arranged on the peripheral wall of the stator core, and the end of the liquid cooling medium channel is triangular with an opening at the outer side. The cooling of the outside of the stator core is effectively realized.
As a preferable technical means: the inter-tooth slot is provided with a plurality of in-slot liquid cooling slots on two sides of the circumferential direction of the stator core, the in-slot liquid cooling slots penetrate through the left cavity and the right cavity, and the in-slot liquid cooling slots are isolated from the stator coils in the inter-tooth slots through in-slot insulating parts. The slots are formed in the stator core inter-tooth slots, so that the cooling medium can directly flow in the stator core, turbulent flow is formed, the heat exchange area is increased, the heat exchange coefficient of the cooling medium and the stator core is increased, and the cooling effect of the stator coil and the stator core is improved.
As a preferable technical means: the liquid cooling tank in the tank is of a rectangular cross section, wherein the number of the liquid cooling tanks in the tank arranged on one side of the inter-tooth tank is one more than that on the other side, the width of the liquid cooling tanks in the tank is separated by one between two adjacent liquid cooling tanks on the same side, and the length of the side edge on the left side or the right side of the inter-tooth tank is equal to the sum of the total width of the liquid cooling tanks in the tank on the left side and the total width of the liquid cooling tanks in the tank on the left side of the. Realize arrangement structure optimization, effectively promote the cooling effect.
Has the advantages that:
1. set up the isolated cavity between the stator and the rotor of motor, avoid coolant and rotor contact to cause harmful effects, and utilize liquid cooling medium's mobility, liquid cooling medium is direct to contact with high-speed permanent-magnet machine's stator coil and stator core, can bring the heat that stator core and stator coil produced outside the motor from the motor is inside, the effectual reduction is because the iron loss that stator core produced and the direct current copper loss that stator coil produced and the temperature that the alternating current copper consumed, thereby reduce the motor bulk temperature, and then can improve the power density and the torque of motor, promote high-speed permanent-magnet synchronous machine's cooling effect, promote the motor performance.
2. The slots are formed in the stator core inter-tooth slots, so that the cooling medium can directly flow in the stator core, turbulent flow is formed, the heat exchange area is increased, the heat exchange coefficient of the cooling medium and the stator core is increased, and the cooling effect of the stator coil and the stator core is improved.
Drawings
Fig. 1 is a schematic semi-sectional view of the motor of the present invention.
Figure 2 is an end view of the stator core of the present invention.
FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention.
In the figure: 1-a machine shell; 2-a rotor; 3-left end cap; 4-right end cap; 5-a stator core; 6-stator coil; 7-a spacer ring; 8-left cavity; 9-a right cavity; 10-a cavity expansion ring groove; 11-a first O-ring seal; 12-a second O-ring seal; 13-in-groove insulation; 101-liquid cooling inlet and outlet; 501-yoke part; 502-teeth; 503-inter-tooth grooves; 504-liquid cooling medium channel; 505-an in-tank liquid cooling tank; 506-notches.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the drawings in the specification.
As shown in fig. 1-3, a high power density high speed permanent magnet synchronous motor cooling structure, the motor includes a casing 1, a stator located inside the casing 1, a rotor 2 located inside the stator, a left end cap 3 and a right end cap 4 located at the left and right ends of the casing 1, the left end cap 3 and the right end cap 4 are connected and sealed with the casing 1, the stator includes a stator core 5 and a stator coil 6, the stator core 5 includes a yoke portion 501 located outside and a tooth portion 502 located inside, the stator coil 6 is wound around the tooth portion 502 through an inter-tooth slot 503, the inside of the inter-tooth slot 503 is provided with an open slot 506, an isolation ring 7 is provided between the rotor 2 and the stator, the left and right ends of the isolation ring 7 are respectively connected and fixed with the left end cap 3 and the right end cap 4 and sealed to form an isolation cavity around the stator, which are a left cavity 8 at the left side of the stator core 5 and a right cavity 9, the machine shell 1 is provided with 2 liquid cooling inlet and outlet ports 101 for liquid cooling medium to enter and exit the isolated cavity, the 2 liquid cooling inlet and outlet ports 101 are respectively communicated with the left cavity 8 and the right cavity 9, and a yoke part 501 of the stator core 5 is surrounded with a liquid cooling medium channel 504 which penetrates through the left cavity 8 and the right cavity 9; the inter-tooth slots 503 are provided with a plurality of in-slot liquid cooling slots 505 on both sides of the stator core 5 in the circumferential direction, the in-slot liquid cooling slots 505 penetrate through the left cavity 8 and the right cavity 9, and the in-slot liquid cooling slots 505 are isolated from the stator coils 6 in the inter-tooth slots 503 by in-slot insulators 13.
In order to enlarge the cavity space on the left and right sides of the stator coil 6, the right side of the left end cover 3 and the left side of the right end cover 4 are respectively provided with a cavity expansion ring groove 10, and the two cavity expansion ring grooves 10 are respectively adjacent to the left and right ends of the stator coil 6. The cavity spaces of the left side and the right side of the stator coil 6 are effectively enlarged, and the cooling effect is better.
In order to realize the sealing of the inner side of the isolated cavity, the inner side walls of the two cavity expansion ring grooves 10 are respectively provided with a surrounding first sealing ring groove, a first O-shaped sealing ring 11 is arranged in each first sealing ring groove, and the isolating ring 7 is connected and fixed on the inner side walls of the cavity expansion ring grooves 10 and tightly presses the first O-shaped sealing rings 11. The sealing of the inner side of the isolated cavity is effectively realized.
In order to realize the sealing of the outer side of the isolated cavity, the left end and the right end of the machine shell 1 are respectively provided with a second sealing ring groove, a second O-shaped sealing ring 12 is arranged in each second sealing ring groove, and the left end cover 3 and the right end cover 4 respectively press the second O-shaped sealing rings 12 at the joints with the machine shell 1. The sealing outside the isolated cavity is effectively realized.
In order to cool the outside of the stator core 5, the liquid cooling medium passage 504 is provided on the outer peripheral wall of the stator core 5, and has a triangular shape whose end is open to the outside. Cooling of the outside of the stator core 5 is effectively achieved.
In order to better realize the cooling effect of the in-tank liquid cooling tanks 505, the in-tank liquid cooling tanks 505 have a rectangular cross section, wherein the number of the in-tank liquid cooling tanks 505 on the left side of the inter-tooth tank 503 is 4, the number of the in-tank liquid cooling tanks 505 on the right side of the inter-tooth tank 503 is 3, the width of one in-tank liquid cooling tank 505 is arranged between two adjacent in-tank liquid cooling tanks 505 on the same side, the length of the side edge on the left side of the inter-tooth tank 503 is equal to the sum of the widths of 7 in-tank liquid cooling tanks 505, and the in-tank liquid cooling tank 505 on the right side of the inter-tooth tank 503 is located at. Realize arrangement structure optimization, effectively promote the cooling effect.
Design isolated cavity between the stator of motor and rotor 2, avoid cooling medium and rotor 2 contact to cause harmful effects, and utilize liquid cooling medium's mobility, liquid cooling medium is direct to contact with high-speed permanent-magnet machine's stator coil 6 and stator core 5, can take the heat that stator core 5 and stator coil 6 produced outside the motor from the motor is inside, effectual reduction is because the iron loss that stator core 5 produced and the direct current copper loss that stator coil 6 produced consume with the temperature that exchanges copper and consume, thereby reduce the motor bulk temperature, and then can improve the power density and the torque of motor, promote high-speed permanent-magnet synchronous machine's cooling effect, promote the motor performance.
Slotting in stator core 5 intertooth groove 503 for coolant can be directly at the inside flow of stator core 5, forms the torrent and flows, increases heat transfer area, increases coolant and stator core 5's heat transfer coefficient, thereby promotes stator coil 6 and stator core 5's cooling effect.
The cooling structure of a high-power-density high-speed permanent magnet synchronous motor shown in fig. 1-3 is a specific embodiment of the present invention, and already embodies the outstanding substantive features and significant improvements of the present invention, and can be modified equivalently in shape, structure and the like according to the practical use requirements and under the teaching of the present invention, and is within the protection scope of the present invention.
Claims (7)
1. The utility model provides a high-speed permanent magnet synchronous motor cooling structure of high power density, the motor include casing (1), be located the inboard stator of casing (1), be located the inboard rotor (2) of stator, be located left end lid (3) and right-hand member lid (4) of casing (1) left and right ends, left end lid (3) and right-hand member lid (4) and casing (1) between match and be connected and sealed, the stator include stator core (5) and stator coil (6), stator core (5) including be located yoke portion (501) in the outside and be located inboard radial tooth portion (502), stator coil (6) pass through tooth space (503) and wind in tooth portion (502), the inboard of tooth space (503) is equipped with open notch (506), its characterized in that: rotor (2) and stator between be equipped with isolating ring (7), both ends are connected fixedly and sealed with left end lid (3) and right end lid (4) respectively about isolating ring (7), form the isolated cavity around the stator, are right cavity (9) on stator core (5) left cavity (8) and stator core (5) right side respectively, casing (1) on be equipped with liquid cooling import and export (101) of 2 liquid cooling medium business turn over isolated cavity, 2 liquid cooling import and export (101) communicate with left cavity (8) and right cavity (9) respectively, yoke portion (501) of stator core (5) encircle and arrange liquid cooling medium passageway (504) that link up left cavity (8) and right cavity (9).
2. The cooling structure of the high-power-density high-speed permanent magnet synchronous motor according to claim 1, characterized in that: the right side of left end cover (3) and the left side of right end cover (4) respectively be equipped with one cavity extension annular (10), two cavity extension annular (10) are adjacent with the left and right ends of stator coil (6) respectively.
3. The cooling structure of the high-power-density high-speed permanent magnet synchronous motor according to claim 2, characterized in that: the inner side walls of the two cavity expansion ring grooves (10) are respectively provided with a surrounding first sealing ring groove, a first O-shaped sealing ring (11) is arranged in the first sealing ring groove, and the isolating ring (7) is connected and fixed on the inner side wall of the cavity expansion ring groove (10) and compresses the first O-shaped sealing ring (11).
4. The cooling structure of the high-power-density high-speed permanent magnet synchronous motor according to claim 3, wherein: and the left end and the right end of the machine shell (1) are respectively provided with a second sealing ring groove, a second O-shaped sealing ring (12) is arranged in the second sealing ring grooves, and the left end cover (3) and the right end cover (4) respectively press the second O-shaped sealing rings (12) at the joint parts of the left end cover and the right end cover and the machine shell (1).
5. The cooling structure of the high-power-density high-speed permanent magnet synchronous motor according to claim 4, wherein: the liquid cooling medium channel (504) is arranged on the peripheral wall of the stator core (5), and the end of the liquid cooling medium channel is triangular with an opening at the outer side.
6. The cooling structure of the high-power-density high-speed permanent magnet synchronous motor according to claim 1, characterized in that: the stator structure is characterized in that a plurality of in-slot liquid cooling slots (505) are arranged on two sides of the inter-tooth slot (503) in the circumferential direction of the stator core (5), the in-slot liquid cooling slots (505) penetrate through the left cavity (8) and the right cavity (9), and the in-slot liquid cooling slots (505) are isolated from stator coils (6) in the inter-tooth slot (503) through in-slot insulators (13).
7. The cooling structure of the high-power-density high-speed permanent magnet synchronous motor according to claim 6, wherein: the in-groove liquid cooling grooves (505) are rectangular in cross section, the number of the in-groove liquid cooling grooves (505) arranged on one side of the inter-tooth groove (503) is one more than that of the other side of the inter-tooth groove, the width of one in-groove liquid cooling groove (505) is arranged between two adjacent in-groove liquid cooling grooves (505) on the same side, and the length of the side edge of the left side or the right side of the inter-tooth groove (503) is equal to the sum of the total widths of the in-groove liquid cooling groove (505) on the left side of the inter-tooth groove (503) and the in-groove liquid cooling groove (505) on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020263111.2U CN211239470U (en) | 2020-03-05 | 2020-03-05 | High-power-density high-speed permanent magnet synchronous motor cooling structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020263111.2U CN211239470U (en) | 2020-03-05 | 2020-03-05 | High-power-density high-speed permanent magnet synchronous motor cooling structure |
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| CN211239470U true CN211239470U (en) | 2020-08-11 |
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| CN202020263111.2U Active CN211239470U (en) | 2020-03-05 | 2020-03-05 | High-power-density high-speed permanent magnet synchronous motor cooling structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301196A (en) * | 2020-11-25 | 2022-04-08 | 华为数字能源技术有限公司 | Stator, motor, power assembly and electric motor car |
| CN114337012A (en) * | 2021-05-21 | 2022-04-12 | 华为数字能源技术有限公司 | Stator, motor and electric automobile |
| JP2022181185A (en) * | 2021-05-25 | 2022-12-07 | ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフト | Stator of electric machine, method for producing the same and electric machine |
| WO2024093547A1 (en) * | 2022-10-31 | 2024-05-10 | 东风汽车集团股份有限公司 | Motor stator assembly and motor |
-
2020
- 2020-03-05 CN CN202020263111.2U patent/CN211239470U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301196A (en) * | 2020-11-25 | 2022-04-08 | 华为数字能源技术有限公司 | Stator, motor, power assembly and electric motor car |
| CN114337012A (en) * | 2021-05-21 | 2022-04-12 | 华为数字能源技术有限公司 | Stator, motor and electric automobile |
| JP2022181185A (en) * | 2021-05-25 | 2022-12-07 | ドクター エンジニール ハー ツェー エフ ポルシェ アクチエンゲゼルシャフト | Stator of electric machine, method for producing the same and electric machine |
| WO2024093547A1 (en) * | 2022-10-31 | 2024-05-10 | 东风汽车集团股份有限公司 | Motor stator assembly and motor |
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