CN103187829A - Cooling of permanent magnet motor - Google Patents
Cooling of permanent magnet motor Download PDFInfo
- Publication number
- CN103187829A CN103187829A CN2011104537286A CN201110453728A CN103187829A CN 103187829 A CN103187829 A CN 103187829A CN 2011104537286 A CN2011104537286 A CN 2011104537286A CN 201110453728 A CN201110453728 A CN 201110453728A CN 103187829 A CN103187829 A CN 103187829A
- Authority
- CN
- China
- Prior art keywords
- rotor
- motor
- fluid coolant
- stator
- heat energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to cooling of a permanent magnet motor. The permanent magnet motor comprises a rotor, a stator and a plurality of cooling channels, wherein the rotor comprises a plurality of permanent magnets, and the stator and the rotor are magnetically communicated and positioned so that a radial air gap can be limited between the rotor and the stator. A shell body is configured so as to isolate the rotor and the stator from the external environment. A pumping element is configured so as to urge air flow to pass through the plurality of the permanent magnets of the rotor of the motor and to take away the electric energy of the permanent magnets, and the cooling channels are arranged in the shell body of the motor and are configured so as to transmit the electric energy from the stator of the motor to a fluid cooling agent which flows by the plurality of the cooling channels. A heat exchanger is communicated with the plurality of the cooling channels in a thermal mode and positioned so that thermal energy can be transmitted to the fluid cooling agent through the air flow.
Description
Technical field
Theme disclosed herein relates to motor.More specifically, the disclosure relates to the cooling of magneto.
Technical background
Magneto as engine and generator, used a lot of years.Magneto is better than other type because of its efficiency, simplicity, robustness and to the rotor of motor and the tolerance of the big radial air gap between the stator.Yet the magneto requirement cools off to prevent the demagnetization of permanent magnet to permanent magnet.This begins to take place usually when permanent magnet surpasses the temperature of 200 degree Celsius approximately for some magnetic materials; Other magnetic material then begins demagnetization in lower temperature.In case demagnetize, motor then no longer can satisfy the specific performance properties target.
Usually adopt several method to prevent demagnetization.The first, design of electrical motor can be had enough excess capacities to reduce the magnet heat load.Yet this causes motor volume excessive.Other motor utilizes fan to introduce relative cool air to permanent magnet surfaces.Yet this cooling means can not be used when motor need be to outside environmental sealing.The third method is to make the rotor chamber of motor be full of cooling agent.This be to must being useful to the motor of outside environmental sealing, but the rotor windage loss that produces owing to the existence of cooling agent can greatly influence efficiency of motor.The 4th kind of method utilized active system, and wherein cooling agent is directly injected on the magnet or through rotor assembly and circulates.This method needs lubricating system and scavenge system usually, particularly when motor can not gravity drainage.
Summary of the invention
According to an aspect of the present invention, a kind of cooling system of magneto for sealing comprises fan element, its be configured to impel air-flow through a plurality of permanent magnets of the rotor of motor to take away heat energy from it.A plurality of cooling ducts are arranged in the housing of motor and are configured that heat energy is delivered to liquid coolant flow by a plurality of cooling ducts from the stator of motor.Heat exchanger is positioned to a plurality of cooling ducts thermal communication so that heat energy is passed to liquid coolant from air-flow.
According to a further aspect in the invention, a kind of magneto comprises rotor, and it comprises a plurality of permanent magnets; And stator, it is communicated with rotor magnetic and locatees to limit radial air gap between rotor and stator.Housing be configured with rotor and stator to outside environmental sealing.Fan element be configured to impel air-flow through a plurality of permanent magnets taking away heat energy from it, and a plurality of cooling duct is arranged in the housing of motor and is configured that heat energy is passed to liquid coolant flow by a plurality of cooling ducts from stator.Heat exchanger is positioned to a plurality of cooling ducts thermal communication so that heat energy is passed to liquid coolant from air-flow.
According to another aspect of the invention, a kind of method of magneto of coolant seal comprises a plurality of cooling ducts that make in the liquid coolant flow process electric machine casing.Heat energy is the liquid coolant transmission to a plurality of cooling ducts of flowing through from the stator of described motor.Air circulates in housing through a plurality of permanent magnets of the rotor of motor, and heat energy from a plurality of permanent magnets to transfer of air.Then the heat energy of air from air to the liquid coolant transmission.
These and other advantage and feature become clearer with explanation in conjunction with the drawings.
Description of drawings
Be considered as that theme of the present invention is pointed out particularly and claimed clearly in the claim of specification ending.Aforementioned and other characteristic of the present invention and advantage will become clear by the detailed description below in conjunction with accompanying drawing, wherein:
Fig. 1 is the profile of magneto embodiment;
Fig. 2 is the exploded view of magneto embodiment; And
Fig. 3 is the another profile of magneto embodiment.
Detailed explanation will be with reference to the accompanying drawings makes an explanation to embodiments of the invention and advantage and feature by example.
Embodiment
Shown in Fig. 1 is the profile of magneto 10.Motor 10 comprises the rotor assembly 12 that can be rotatably set on the electrical axis 14.Rotor 12 comprises a plurality of permanent magnets 16.Stator 18 radially is arranged on the outside of rotor 12, limits air gap 20 between stator 18 and rotor 12.Stator 18 comprises stator core 22 and a plurality of stator winding 24, and the stator winding extends through stator core, itself and permanent magnet 16 magnetic interactions.Rotor 12 and stator 18 are arranged on housing 26 inside, and housing is with 10 pairs of outside environmental sealings of motor.
It is the exploded view of motor 10 shown in Fig. 2.Housing 26 comprise shell body 28 and be arranged on shell body 28 and stator 18 between inner housing 30.A plurality of cooling ducts 32 are arranged in housing 26 between the external diameter 34 of stator 18 and housing 26.As shown in Figure 2, in certain embodiments, circumferentially extend around motor 10 a plurality of cooling ducts 32.Other that it should be understood, however, that cooling duct 32 arranges form, falls in the protection range of the present disclosure as labyrinth type or 32 expections of axially extended cooling duct.One or more coolant entrances 36 and one or more coolant outlet 38 are arranged in the housing 26, and are connected to a plurality of cooling ducts 32, to export cooling agents to 32 inputs of a plurality of cooling ducts or from a plurality of cooling ducts 32.Cooling agent is the mixture of for example water, water and ethylene glycol or the mixture of water and propylene glycol.Cooling agent is imported a plurality of cooling ducts 32 from the coolant source (not shown) via one or more coolant entrances 36.Along with cooling agent a plurality of cooling ducts 32 of flowing through, as shown in Figure 3, heat energy is passed to cooling agent from stator 18.Cooling agent is flowed through a plurality of cooling ducts 32 and is not entered rotor 12.Cooling agent is discharged housing 26 via one or more coolant outlets 38, and heat energy is dissipated to outside the motor 10.
Still referring to Fig. 3, motor 10 also comprises the air cooling circuit.Pumping element as centrifugal blower 40, is arranged on rotor 12 places.Though there is certain air volume in 10 pairs of outside environmental sealings of motor in the housing 26.When being driven by rotor 12, centrifugal blower 40 increases pressure to the air volume of crossing in the housing 26, force air cross permanent magnet 16 and through air gap 20 to set up the closed loop air-flow.Comprise centrifugal blower 40 though it should be understood that Fig. 3 embodiment, other embodiment can comprise that other fan element is to increase pressure to air volume.For example, some embodiment can comprise and rotor 12 one or attached fan characteristics with it.Through the air-flow of permanent magnet 16 from permanent magnet 16 to transfer of air heat energy.Airflow passes air gap 20 and enter be positioned at a plurality of cooling ducts 32 radial outsides and with the heat exchanger 42 of housing 26 one.Though the embodiment of Fig. 3 comprises the heat exchanger 42 with housing 26 one, it should be understood that other embodiment can comprise other heat exchanger 42 configurations and/or setting.For example, heat exchanger 42 can be fixed on housing 26 outsides, or in other position, and cooling duct 26 extends to heat exchanger 42.At heat exchanger 42 places, the heat energy in air transmission enters heat exchanger 42, enters the cooling agent of the cooling duct 32 of flowing through then.Cooling agent is taken away heat energy from motor, as previously described.The air-flow that centrifugal blower 40 keeps through motor, when being pulled away with the heat in the convenient heat exchanger, air cycles back to rotor 12 through air gap 20 and through permanent magnet 16, to absorb more heat therefrom.
Although only describe in detail in conjunction with the present invention of limited embodiment, be understood that easily the present invention is not limited to these disclosed embodiment.On the contrary, can revise the present invention, with in conjunction with undeclared but many variants, change, replacement or equivalent arrangements that match with the spirit and scope of the present invention before this.In addition, although various embodiment of the present invention has been described, should be understood that aspect of the present invention may include only some illustrated embodiment.Therefore, the present invention should not limited by aforementioned specification.
Claims (20)
1. cooling system that is used for the magneto of sealing comprises:
Pumping element, its be configured to impel air-flow through a plurality of permanent magnets of the rotor of described motor to take away heat energy from it;
A plurality of cooling ducts, it is arranged in the housing of described motor and is configured that heat energy is passed to stream of fluid coolant by described a plurality of cooling ducts from the stator of described motor; And
Heat exchanger, itself and described a plurality of cooling ducts thermal communication are to be passed to described fluid coolant with heat energy from described air-flow.
2. the described system of claim 1, wherein said fluid coolant is one or more in water or water/ethylene glycol or the water/propylene glycol.
3. the described system of claim 1, wherein said fluid coolant is introduced described housing via one or more coolant entrances.
4. the described system of claim 1, wherein said fluid coolant is discharged described housing via one or more coolant outlets.
5. the described system of claim 1, roughly circumferentially extend around described stator wherein said a plurality of cooling ducts.
6. the described system of claim 1, the wherein said fluid coolant described motor of flowing through, but the described rotor of not flowing through.
7. the described system of claim 1, wherein said pumping element is centrifugal blower.
8. the described system of claim 1, wherein said heat exchanger and described housing are one.
9. magneto comprises:
Rotor, it comprises a plurality of permanent magnets;
Stator, it is communicated with described rotor magnetic and locatees to limit radial air gap between described rotor and stator;
Housing, its be configured with described rotor and stator to outside environmental sealing;
Pumping element, it is configured to impel the described a plurality of permanent magnets of air-flow process to take away heat energy from it;
A plurality of cooling ducts, it is arranged in the described housing and is configured that heat energy is passed to stream of fluid coolant by described a plurality of cooling ducts from the stator of described motor; And
Heat exchanger, itself and described a plurality of cooling ducts thermal communication are to be delivered to described fluid coolant with heat energy from described air-flow.
10. the described motor of claim 9, wherein said fluid coolant is one or more in water or water/ethylene glycol or the water/propylene glycol.
11. the described motor of claim 9, wherein said fluid coolant is introduced described housing via one or more coolant entrances.
12. the described motor of claim 9, wherein said fluid coolant is discharged described housing via one or more coolant outlets.
13. the described motor of claim 9, roughly circumferentially extend around described stator wherein said a plurality of cooling ducts.
The described motor 14. the described motor of claim 9, wherein said fluid coolant are flowed through, but the described rotor of not flowing through.
15. the described motor of claim 9, wherein said heat exchanger and described housing are one.
16. the method for the magneto of a coolant seal comprises:
Fluid coolant is flowed by a plurality of cooling ducts in the described electric machine casing;
Fluid coolant transferring heat energy from from the stator of described motor to the described a plurality of cooling ducts of flowing through;
Impel a plurality of permanent magnets circulations of the rotor of the described motor of air process in the described housing;
From described a plurality of permanent magnets to described transfer of air heat energy; And
From described air to described fluid coolant transferring heat energy.
17. the described method of claim 16 comprises from described air via being arranged on heat exchanger in the described housing to described fluid coolant transferring heat energy.
18. the described method of claim 16 comprises making described fluid coolant one or more fluid issuings of flowing through, thereby takes away heat energy from described motor.
19. the described method of claim 16, but comprise impel air via with the circulation of the pumping element of described rotor operable communication.
20. the described method of claim 16 comprises via one or more entrances described fluid coolant is introduced described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104537286A CN103187829A (en) | 2011-12-30 | 2011-12-30 | Cooling of permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104537286A CN103187829A (en) | 2011-12-30 | 2011-12-30 | Cooling of permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103187829A true CN103187829A (en) | 2013-07-03 |
Family
ID=48678840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104537286A Pending CN103187829A (en) | 2011-12-30 | 2011-12-30 | Cooling of permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103187829A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134878A (en) * | 2016-02-29 | 2017-09-05 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor assembly, compressor with permanent magnet synchronous motor assembly and air conditioner with permanent magnet synchronous motor assembly |
| CN110034633A (en) * | 2019-04-15 | 2019-07-19 | 中车永济电机有限公司 | Generator amature permanent magnet pole cooling air duct structure |
| CN111416456A (en) * | 2019-01-07 | 2020-07-14 | 奥迪股份公司 | Liquid-cooled rotor for an electric machine |
| CN114017365A (en) * | 2021-11-12 | 2022-02-08 | 海南极锐浩瀚动力系统科技有限公司 | High-speed air suspension compressor for fuel cell with enclosed stator, fuel cell system and vehicle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4839547A (en) * | 1988-03-28 | 1989-06-13 | Wertec Corporation | Motor frame and motor with increased cooling capacity |
| JP2001008411A (en) * | 1999-06-16 | 2001-01-12 | Toyo Electric Mfg Co Ltd | Method for cooling outer-fan-cooled sealed permanent magnet rotating electric machine |
| JP2005039926A (en) * | 2003-07-14 | 2005-02-10 | Kawasaki Heavy Ind Ltd | Low-speed motor |
| JP2007325436A (en) * | 2006-06-01 | 2007-12-13 | Mitsubishi Electric Corp | Full-close type liquid-cooled electric motor |
| CN201142605Y (en) * | 2008-01-15 | 2008-10-29 | 江苏远东电机制造有限公司 | Ventilation structure between motor base and stator |
| WO2011019334A1 (en) * | 2009-08-11 | 2011-02-17 | General Electric Company | Permanent magnet motor for subsea pump drive |
| CN102208845A (en) * | 2010-03-30 | 2011-10-05 | 株式会社日立制作所 | Permanent magnetic rotating electric machine and wind power generating system |
-
2011
- 2011-12-30 CN CN2011104537286A patent/CN103187829A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4839547A (en) * | 1988-03-28 | 1989-06-13 | Wertec Corporation | Motor frame and motor with increased cooling capacity |
| JP2001008411A (en) * | 1999-06-16 | 2001-01-12 | Toyo Electric Mfg Co Ltd | Method for cooling outer-fan-cooled sealed permanent magnet rotating electric machine |
| JP2005039926A (en) * | 2003-07-14 | 2005-02-10 | Kawasaki Heavy Ind Ltd | Low-speed motor |
| JP2007325436A (en) * | 2006-06-01 | 2007-12-13 | Mitsubishi Electric Corp | Full-close type liquid-cooled electric motor |
| CN201142605Y (en) * | 2008-01-15 | 2008-10-29 | 江苏远东电机制造有限公司 | Ventilation structure between motor base and stator |
| WO2011019334A1 (en) * | 2009-08-11 | 2011-02-17 | General Electric Company | Permanent magnet motor for subsea pump drive |
| CN102208845A (en) * | 2010-03-30 | 2011-10-05 | 株式会社日立制作所 | Permanent magnetic rotating electric machine and wind power generating system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134878A (en) * | 2016-02-29 | 2017-09-05 | 珠海格力电器股份有限公司 | Permanent magnet synchronous motor assembly, compressor with permanent magnet synchronous motor assembly and air conditioner with permanent magnet synchronous motor assembly |
| CN111416456A (en) * | 2019-01-07 | 2020-07-14 | 奥迪股份公司 | Liquid-cooled rotor for an electric machine |
| US11277056B2 (en) | 2019-01-07 | 2022-03-15 | Audi Ag | Fluid-cooled rotor for an electric machine |
| CN110034633A (en) * | 2019-04-15 | 2019-07-19 | 中车永济电机有限公司 | Generator amature permanent magnet pole cooling air duct structure |
| CN114017365A (en) * | 2021-11-12 | 2022-02-08 | 海南极锐浩瀚动力系统科技有限公司 | High-speed air suspension compressor for fuel cell with enclosed stator, fuel cell system and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9960649B2 (en) | Rotating electric machine | |
| CN110800191A (en) | Stator of an electric machine and cooling device for a stator | |
| US10630157B2 (en) | Axial flux machine | |
| CN106451866B (en) | Motor rotor support and motor | |
| US9419498B2 (en) | Rotary electric machine | |
| CN109155558A (en) | Motor and vehicle with same | |
| FI123660B (en) | Cooling system for an electric machine | |
| US10415590B2 (en) | Electric coolant pump | |
| CN205319816U (en) | Permanent magnetism disk type motor cooling system | |
| CN106451864B (en) | Permanent magnet traction motor mixed ventilation cooling system and method | |
| US8847444B2 (en) | Cooling of permanent magnet electric machine | |
| US8604651B2 (en) | Cooling of permanent magnet electric machine | |
| CN102725945A (en) | Arrangement and method for cooling an electrical machine | |
| CN109075636B (en) | Cooling of hybrid rotor modules | |
| CN110601446B (en) | Method for manufacturing rotor | |
| EP2918847A1 (en) | Turbo machine system | |
| EP2490320B1 (en) | Cooling of permanent magnet electric machine | |
| CN103765732A (en) | Electric motor | |
| CN103187829A (en) | Cooling of permanent magnet motor | |
| CN107465323A (en) | A kind of magneto cage-type rotor and magneto | |
| CN106232257A (en) | Internal closed loop cools down | |
| EP2602916A1 (en) | Cooling of permanent magnet electric machine | |
| US20240097546A1 (en) | Magnetic geared electrical machine and power generation system using the same | |
| TWI692177B (en) | Electric machine apparatus with internal cooling mechanism | |
| KR20150068224A (en) | Cooling structure of drive motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130703 |