CN103973061A - Permanent magnet synchronous motor device with closed self-circulation cooling system for stator - Google Patents
Permanent magnet synchronous motor device with closed self-circulation cooling system for stator Download PDFInfo
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- CN103973061A CN103973061A CN201410139014.1A CN201410139014A CN103973061A CN 103973061 A CN103973061 A CN 103973061A CN 201410139014 A CN201410139014 A CN 201410139014A CN 103973061 A CN103973061 A CN 103973061A
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Abstract
The invention particularly relates to a permanent magnet synchronous motor device with a closed self-circulation cooling system for a stator, and belongs to the field of electrical technologies. The permanent magnet synchronous motor device comprises a motor shaft and a rotor core. The rotor core sleeves the motor shaft, a non-magnetic ring is arranged between the motor shaft and the rotor core, a stator core sleeves the rotor core, a vacuum jacket is arranged between the rotor core and the stator core, a housing case sleeves the stator core, and cooling pipes are respectively arranged on the inner side and the outer side of the housing case. The permanent magnet synchronous motor device has the advantages that the permanent magnet synchronous motor device is provided with the vacuum jacket of a rotor, so that heat generated due to eddy-current loss on the surface of the rotor can be effectively stopped against being transmitted to permanent magnets; heat inside a motor can be quickly carried away by the closed self-circulation cooling system for the stator, so that temperature rise of the motor can be reduced, influence of high temperature rise on demagnetization of the permanent magnets can be decreased, the service lives of the permanent magnets and the service life of the motor can be prolonged, and the overload capacity of the motor can be improved.
Description
Technical field
The present invention is specifically related to a kind of permanent magnet synchronous electric machine of stator employing closed self-circulation cooling system, belongs to technical field of electricity.
Background technology
Magneto is because it is without excitation winding and field power supply, simple in structure, loss is little, has the remarkable advantages such as efficiency is high, power density is high, particularly aspect efficiency, show that electric exciting motor is difficult to be equal to superiority.Magneto, has a good application prospect with its unique advantage at space flight, machining, boats and ships and military industry field.
Magneto is compared with conventional motor, the magnetic field of magneto is produced by permanent magnet, due to the difference of type of drive and the impact of utmost point groove, permanent magnet machine rotor can produce loss, and concentrated magnetic pole and the region, rotor yoke top layer of being distributed in, thereby cause this region heat source density larger, cause rotor heating.When serious, can cause permanent magnet demagnetization, affect performance and the reliability of motor, shortening motor useful life.At present, the type of cooling of magneto is air cooling, water-cooled, airtight oil cooling etc., little to rotor dispersing heat effect, and then affects permanent magnet performance, and then jeopardizes motor safety.
Summary of the invention
The present invention is directed to the higher and temperature distributing disproportionation of current magneto solid rotor surface temperature rise weighing apparatus, the problem that makes permanent magnet excess Temperature and demagnetize, propose the permanent magnet synchronous electric machine that a kind of stator adopts closed self-circulation cooling system, the job stability of the interior permanent magnet of motor and whole motor is improved.
The present invention solves the technical scheme of its technical problem: comprise the rotor core that on motor shaft and motor shaft there is cover, between motor shaft and rotor core, be provided with magnetism-isolating loop, rotor core overcoat has stator core, between rotor core and stator core, be provided with vacuum jacket, stator core overcoat has casing, and internal side of shell and outside are respectively equipped with cooling water pipe.
Described rotor core surface is provided with rotor ventilation groove vertically, and described rotor ventilation groove number is 4-12, and its width is 3-5mm, and the degree of depth is 1-2mm; Described vacuum jacket is made up of inner layer wall, vacuum layer, outer wall; The inner layer wall of described vacuum jacket and outer wall wall thickness are about 1-2mm, and vacuum layer thickness is 0.5-1.5mm.
Stator core inner circle side is along even circumferential distribution stator winding groove, and cylindrical side is along even circumferential distribution stator ventilation groove; Described stator ventilation groove number is 6-15.
Cooling water pipe is shaped as rectangle, is made up of interior cooling water pipe and outer cooling water pipe, all cooling water pipe composition loop configuration; Interior cooling water pipe is placed on stator ventilation ducts trench bottom, and interior cooling water pipe cross section accounts for the 40%-60% of stator ventilation trench cross-section; Outer cooling water pipe is placed in casing outside; Cooling water pipe is 3 ° of-5 ° of angles of inclination vertically.
Described vacuum jacket is electric conducting material.
The beneficial effect that compared to the prior art the present invention had: be provided with respectively cooling water pipe inside and outside casing, design the synthetic two phase medium cooling systems in different cooling ducts, can effectively reduce machine operation temperature rise, improve electric system stability.In addition, the vacuum jacket outside rotor surface can form near adiabatic layer, and the eddy current that rotor surface forms and consequent heat are difficult to going down, to permanent magnet transferring heat; Because air gap between permanent magnet motor stator and rotor is very little, be generally about between 0.5-3mm, the temperature gradient between rotor, can carry out cooled rotor by closed stator self-circulation cooling system.Further rotor core surface is provided with rotor ventilation groove vertically, under fan effect, can form circumference wind speed and axial wind speed, can significantly reduce the rotor axial temperature difference, make rotor good cooling results, and then weaken the impact bringing to motor because of thermal stress distribution imbalance.
Brief description of the drawings
Fig. 1 is cross-sectional view of the present invention;
Fig. 2 is Structure of cross section schematic diagram of the present invention;
Fig. 3 is pipe structure for cooling schematic diagram of the present invention.
In figure, 1. stator core, 2. stator winding groove, 3. stator ventilation groove, 4. rotor core, 5. rotor ventilation groove, 6. permanent magnet, 7. vacuum jacket, the inner layer wall of 7-1. vacuum jacket, the vacuum layer of 7-2. vacuum jacket, the outer wall of 7-3. vacuum jacket, 8. cooling water pipe, cooling water pipe in 8-1., the outer cooling water pipe of 8-2., 9. magnetism-isolating loop, 10. motor shaft, 11. casings, 12. aerofoil fans, 13. stator winding.
Embodiment
When considered in conjunction with the accompanying drawings, by the detailed description with reference to below, can more completely understand better the present invention and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation with embodiment by reference to the accompanying drawings.
Embodiment 1: as depicted in figs. 1 and 2, stator core 1 inner circle side is along even circumferential distribution stator winding groove 2, and cylindrical side is along even circumferential distribution stator ventilation groove 3; Described stator ventilation groove number is 8; Permanent magnet 6 adopts 4 utmost points, embed in rotor core 4 or Surface Mount on rotor core 4; Described magnetism-isolating loop 9 is connected with motor shaft 10 keys; Rotor ventilation groove 5 quantity are 4; Described cooling water pipe 8 is 3 ° of-5 ° of angles of inclination vertically.Fan by heat by with casing in cooling water pipe cooling fluid carry out exchange heat, cooling fluid in the cooling water pipe that is heated, after evaporation, cooling fluid flows to the outer cooling water pipe of casing, as shown in solid arrow in Fig. 3.Cooling water pipe outside casing communicates with inside, and contrary with internal heat air-flow direction, as shown in empty arrow in Fig. 3.Cooling water pipe outside casing communicates with inside, and contrary with internal heat air-flow direction, as shown in empty arrow in Fig. 3.
The rotor of permanent magnet motor is in the time of starting and operation, the upper formation compared with maelstrom loss in rotor core 4 surfaces, can produce higher temperature and heat, permanent magnet 6 embed in rotor core 4 or Surface Mount on rotor core 4, the outer vacuum jacket 7 that is provided with in rotor core 4 surfaces, can form near adiabatic layer, eddy current and consequent heat that rotor core 4 surfaces form are difficult to going down, to permanent magnet 6 transferring heats.Under aerofoil fan 12 effects, rotor core 4 surface eddy losses can be produced to heat and take away.The cooling mode of closed stator self-loopa: under 12 effects of motor shaft flow fan, outside motor cold wind is blown into motor internal, cold wind is from stator ventilation groove 3 axial flow.The heat of stator core 1 by with stator ventilation groove 3 in interior cooling water pipe 8-1 in cooling fluid carry out exchange heat, the cooling fluid of being heated in interior cooling water pipe 8-1, after evaporation, flow in outer cooling water pipe 8-2, cooling water pipe 8 inclinations angle are contrary with the coolant flow direction of inner evaporation, the cooling fluid of gaseous state is met in cooling water pipe 8-2 cold outside, flow back in interior cooling water pipe 8-1, form self-loopa cooling.
In sum, execution mode of the present invention only provides a kind of execution mode of the best, technology contents of the present invention and technical characterstic disclose as above, but the content that the personage who is familiar with the technology still may be based on disclosed and do various replacement and the modifications that do not deviate from creation spirit of the present invention; Therefore, protection scope of the present invention is not limited to the technology contents that embodiment discloses, therefore all equivalences of doing according to shape of the present invention, structure and principle change, is all encompassed in protection scope of the present invention.
Claims (5)
1. the permanent magnet synchronous electric machine of a stator employing closed self-circulation cooling system, it is characterized in that: comprise the rotor core (4) that the upper cover of motor shaft (10) and motor shaft (10) has, between motor shaft (10) and rotor core (4), be provided with magnetism-isolating loop (9), rotor core (4) overcoat has stator core (1), between rotor core (4) and stator core (1), be provided with vacuum jacket (7), stator core (1) overcoat has casing (11), and casing (11) inner side and outside are respectively equipped with cooling water pipe (8).
2. a kind of stator according to claim 1 adopts the permanent magnet synchronous electric machine of closed self-circulation cooling system, it is characterized in that: described rotor core (4) surface is provided with rotor ventilation groove (5) vertically, described rotor ventilation groove number is 4-12, its width is 3-5mm, and the degree of depth is 1-2mm; Described vacuum jacket (7) is made up of inner layer wall (7-1), vacuum layer (7-2), outer wall (7-3); The inner layer wall (7-1) of described vacuum jacket (7) and outer wall (7-3) wall thickness are about 1-2mm, and vacuum layer (7-2) thickness is 0.5-1.5mm.
3. a kind of stator according to claim 1 adopts the permanent magnet synchronous electric machine of closed self-circulation cooling system, it is characterized in that institute: stator core (1) inner circle side is along even circumferential distribution stator winding groove (2), and cylindrical side is along even circumferential distribution stator ventilation groove (3); Described stator ventilation groove number is 6-15.
4. a kind of stator according to claim 3 adopts the permanent magnet synchronous electric machine of closed self-circulation cooling system, it is characterized in that: cooling water pipe (8) is shaped as rectangle, formed all cooling water pipe composition loop configuration by interior cooling water pipe (8-1) and outer cooling water pipe (8-2); Interior cooling water pipe (8-1) is placed on stator ventilation groove (3) bottom, and interior cooling water pipe (8-1) cross section accounts for the 40%-60% of stator ventilation groove (3) cross section; Outer cooling water pipe (8-2) is placed in casing (11) outside; Cooling water pipe (8) is 3 ° of-5 ° of angles of inclination vertically.
5. a kind of stator according to claim 1 adopts the permanent magnet synchronous electric machine of closed self-circulation cooling system, it is characterized in that: described vacuum jacket (7) is electric conducting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139014.1A CN103973061B (en) | 2014-04-08 | 2014-04-08 | Permanent magnet synchronous motor device with closed self-circulation cooling system for stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139014.1A CN103973061B (en) | 2014-04-08 | 2014-04-08 | Permanent magnet synchronous motor device with closed self-circulation cooling system for stator |
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| Publication Number | Publication Date |
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| CN103973061A true CN103973061A (en) | 2014-08-06 |
| CN103973061B CN103973061B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410139014.1A Active CN103973061B (en) | 2014-04-08 | 2014-04-08 | Permanent magnet synchronous motor device with closed self-circulation cooling system for stator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994706A (en) * | 2018-01-25 | 2018-05-04 | 博远机电（嘉兴）有限公司 | Super high speed motor |
| CN108604850A (en) * | 2016-02-03 | 2018-09-28 | 三菱电机株式会社 | Electric rotating machine |
| CN109660046A (en) * | 2019-01-21 | 2019-04-19 | 浙江飞旋科技有限公司 | High-speed high-power motor durface mounted permanent magnet rotor with medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060113851A1 (en) * | 2004-11-30 | 2006-06-01 | Nissan Motor Co., Ltd. | Motor cooling device and cooling method |
| CN102801238A (en) * | 2012-08-15 | 2012-11-28 | 北京交通大学 | Permanent magnet motor rotor beneficial for radiating |
| CN203104215U (en) * | 2013-01-06 | 2013-07-31 | 宁波安信数控技术有限公司 | Motor suitable for multiple cooling modes |
| CN103414287A (en) * | 2013-08-29 | 2013-11-27 | 安徽安凯汽车股份有限公司 | Drive motor used for electric vehicle |
| CN103683778A (en) * | 2013-12-05 | 2014-03-26 | 北京交通大学 | Permanent magnet motor with back-wound type internal water-cooling stator winding and hollow-solid thermal insulation rotor sheath |
-
2014
- 2014-04-08 CN CN201410139014.1A patent/CN103973061B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060113851A1 (en) * | 2004-11-30 | 2006-06-01 | Nissan Motor Co., Ltd. | Motor cooling device and cooling method |
| CN102801238A (en) * | 2012-08-15 | 2012-11-28 | 北京交通大学 | Permanent magnet motor rotor beneficial for radiating |
| CN203104215U (en) * | 2013-01-06 | 2013-07-31 | 宁波安信数控技术有限公司 | Motor suitable for multiple cooling modes |
| CN103414287A (en) * | 2013-08-29 | 2013-11-27 | 安徽安凯汽车股份有限公司 | Drive motor used for electric vehicle |
| CN103683778A (en) * | 2013-12-05 | 2014-03-26 | 北京交通大学 | Permanent magnet motor with back-wound type internal water-cooling stator winding and hollow-solid thermal insulation rotor sheath |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108604850A (en) * | 2016-02-03 | 2018-09-28 | 三菱电机株式会社 | Electric rotating machine |
| CN107994706A (en) * | 2018-01-25 | 2018-05-04 | 博远机电（嘉兴）有限公司 | Super high speed motor |
| CN107994706B (en) * | 2018-01-25 | 2024-02-09 | 博远机电（嘉兴）有限公司 | Ultra-high speed motor |
| CN109660046A (en) * | 2019-01-21 | 2019-04-19 | 浙江飞旋科技有限公司 | High-speed high-power motor durface mounted permanent magnet rotor with medium |
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| CN103973061B (en) | 2017-02-01 |
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