CN102377286A - Motor and cooling systeem thereof - Google Patents

Motor and cooling systeem thereof Download PDF

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Publication number
CN102377286A
CN102377286A CN2011102993443A CN201110299344A CN102377286A CN 102377286 A CN102377286 A CN 102377286A CN 2011102993443 A CN2011102993443 A CN 2011102993443A CN 201110299344 A CN201110299344 A CN 201110299344A CN 102377286 A CN102377286 A CN 102377286A
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China
Prior art keywords
motor
stator
cooling
air
rotor
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CN2011102993443A
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Chinese (zh)
Inventor
赵祥
张新丽
张世福
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JIANGSU JINFENG WIND POWER EQUIPMENT MANUFACTURE CO Ltd
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JIANGSU JINFENG WIND POWER EQUIPMENT MANUFACTURE CO Ltd
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Priority to CN2011102993443A priority Critical patent/CN102377286A/en
Publication of CN102377286A publication Critical patent/CN102377286A/en
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Abstract

The invention provides a permanent magnet motor and a cooling system thereof. The motor comprises a rotor iron core, a magnet arranged on the peripheral surface of the rotor iron core, a stator iron core arranged on the periphery of the rotor iron core and a stator winding arranged in a slot of the stator iron core. The permanent magnet motor is characterized in that the motor comprises air cooling channels arranged in a stator and a rotor and a liquid cooling channel arranged in the stator.

Description

Motor and cooling system thereof
Technical field
The present invention relates to a kind of motor and be used for the cooling system of this motor.
Background technology
Can produce copper loss, iron loss and other supplementary load loss in the motor operation course.For magneto, also can relate to permanent magnet and under the harmonic field effect, produce the surface eddy loss.These loss meetings bring the heating of motor, if heat can not in time loose, the temperature rise of motor are transfinited.Temperature rise is an important indicator of weighing motor, and it is determining the useful life of motor.What at first bring is exactly Insulation Problems because electric machine temperature rise transfinites, and it directly affects the service behaviour of motor.Experiment showed, that for B, F, H class F insulation 10,12,14 ℃ of the every risings of temperature will be shortened half the useful life of motor.In addition, owing to the intensity of metal and hardness can descend along with temperature raises, so the heating of motor also will can strengthen the thermal stress and the thermal fatigue of structural member inevitably.
Because the magnetic characteristic of permanent magnet is responsive especially to working temperature, thereby the design of temperature rise is most important especially for magneto.Because too high working temperature might cause the reduction of permanent magnet magnetic performance, even under abominable working condition, may produce irreversible loss of excitation.For electric machine temperature rise is controlled in the limit range, must take effective cooling provision according to actual conditions.
At present, be fully to reduce electric machine temperature rise, generally adopt air cooling, hydrogen-cooled and liquid cooling etc. that motor is cooled off.Air is the most frequently used gas cooling medium, the advantage of air cooling be simple in structure, cost is low, maintenance is more convenient, the air cooling way radiating efficiency is low, invisible waste is big but adopt separately.Therefore, for large turbo-type generator, adopt hydrogen-cooled and liquid cooling usually.Hydrogen is more good coolant than air; But because after hydrogen mixes an amount of air; There is the danger that sets off an explosion with oxygen; Cause cooled electric machine at aspects such as blast resistance construction, sealing, safety special requirement to be arranged all, the also corresponding raising of its complexity only just can be adopted on large turbo-type generator usually.For fluid-cooled electrical machine, because specific heat, the conductive coefficient of liquid are bigger than gas, its heat-sinking capability also greatly improves than the motor that adopts air cooling.The coolant that fluid-cooled electrical machine is commonly used is a water.For large-scale water turbine and turbo generator, often adopt the winding internal water cooling, provide the water-cooled medium directly to cool off winding inside, effectively reduce caloric value.Although water-cooled machine possesses plurality of advantages, because the internal water cooling complex structure, be not suitable for the mid power motor, all be support water-cooled form so heavy-duty motor adopts in the present major part.
But, in practical engineering application, adopt simple support water-cooling pattern but to be difficult to effectively reduce motor winding temperature rise, and the magnetic characteristic that also need consider permanent magnet in the magneto is to the special sensitive issue of working temperature.Might cause the reduction of permanent magnet magnetic performance for fear of too high working temperature, when design magneto cooling system, also need consider the cooling problem of the permanent magnet that motor adopts.Therefore,, need a kind of while can cooling motor and the type of cooling of permanent magnet, guarantee that electric machine temperature rise is controlled in zone of reasonableness, can make the reliable working performance of motor for magneto.
Summary of the invention
Only cool off in order to solve in the prior art motor type of cooling to the motor main body; Can't fully dispel the heat and cooling to permanent magnet; And then influence problems such as machine operation performance and useful life; The present invention provides a kind of compact conformation and possesses the magneto of liquid cooling structure and air-cooled structure simultaneously, and the motor cooling system that can fully cool off simultaneously the permanent magnet in motor main body and the motor.
According to an aspect of the present invention; A kind of motor is provided; Said motor comprises rotor core, is installed in the magnet on the rotor core outer surface, the interior stator winding of wire casing that is arranged on the stator core of rotor core periphery and is arranged on stator core; It is characterized in that said motor comprises the air-cooled passage that is arranged in stator and the rotor and is arranged on the liquid cooling passage in the stator.
Wherein, Said air-cooled passage can comprise the axial ventilation ditch that is arranged in the rotor field spider, be arranged on the rotor radial air duct in the rotor core; Be arranged on the stator radial ducts in the stator core; Fluid is communicated with between said axial ventilation ditch, rotor radial air duct and the stator radial ducts, and said liquid cooling passage is the cooling fluid pore that is arranged in the stator core.
Wherein, said cooling fluid pore can be arranged on stator core yoke portion.Can be provided with coolant pipe in the cooling fluid pore.Said coolant pipe can be copper pipe.Said liquid cooling passage can be water-cooling channel.
Wherein, said motor can be magneto.
According to a further aspect in the invention; A kind of motor is provided; Said motor comprises stator core, be arranged on stator winding in the wire casing of stator core, be arranged on the rotor core of stator core periphery and be attached to the inboard magnet of rotor core; It is characterized in that, it is characterized in that said motor comprises the air-cooled passage that is arranged in stator and the rotor and is arranged on the liquid cooling passage in the stator.
Wherein, Said air-cooled passage can comprise and is arranged on the inboard stator shaft orientation ventilation ducts of stator core, is arranged on the stator radial ducts in the stator core and is arranged on the rotor radial air duct in the rotor core; Fluid is communicated with between said stator shaft orientation ventilation ducts, stator radial ducts and the rotor radial air duct, and said liquid cooling passage is the cooling fluid pore that is arranged in the stator core.
Wherein, said cooling fluid pore can be arranged on stator core yoke portion.Can be provided with coolant pipe in the cooling fluid pore.Said coolant pipe can be copper pipe.Said liquid cooling passage can be water-cooling channel.
Wherein, said motor can be magneto.
According to another aspect of the invention; A kind of cooling system that is used for above-mentioned motor is provided; Said cooling system comprises air-cooled cycling element and liquid cooling cycling element; Said air-cooled cycling element is used to make cold wind to circulate and heat exchange through the air-cooled passage of motor, and said liquid cooling cycling element is used for that cooling fluid is sent into the liquid cooling passage and circulates and heat exchange.
Wherein, said air-cooled cycling element can comprise first circulating fan that is arranged on the first outside heat exchanger of motor and makes cold wind circulation entering motor.
Wherein, said first heat exchanger can be air-air heat exchanger or sky-water heat exchanger.
Wherein, said liquid cooling cycling element can comprise and the channel attached pump of liquid cooling and second heat exchanger.
Wherein, said second heat exchanger can be sky-water heat exchanger or water-water heat exchanger.
Wherein, the cooling fluid that adopts is a water.
Cooling system according to the present invention is specially adapted in the middle heavy-duty motor; Also can be widely used in the industrial equipments such as turbo generator, hydraulic generator, wind-driven generator, satisfy these equipment for improving the motor internal cooling effect and dwindling the requirement of motor size.
Description of drawings
Through below in conjunction with the description carried out of accompanying drawing that an example exemplarily is shown, of the present invention above-mentionedly will become apparent with other purposes and characteristics, wherein:
Fig. 1 is the inner ventilation cooling structure sketch map of permagnetic synchronous motor;
Fig. 2 is the water-cooling system sketch map of permagnetic synchronous motor;
Fig. 3 is the stator punching sketch map of permagnetic synchronous motor;
Fig. 4 shows the rotor of motor and the three-dimensional cutaway view of stator according to an exemplary embodiment of the present invention.
The absolutely empty heat exchanger of each symbol implication: 1-among Fig. 1; Circulating fan in the 2-; 3-outer circulation blower fan; The 4-cooling water pipe; The 5-stator core; The 6-stator winding; The 7-permanent magnet; The 8-rotor core; 9-stator radial ducts; 10-rotor radial air duct; 11-rotor field spider axial ventilation ditch; The air-cooled cycling element of 12-; The 13-magneto; The 14-water circuit system; The 15-water pump; The empty water heat exchanger of 16-; 17-fan and motor; The 18-stator slot; 19-stator core yoke portion; 20-cooling water pore.
Embodiment
To be that embodiment introduces cooling system of the present invention with a magneto of on wind turbine generator, using below.Magneto comprises rotor core 8, is installed in the permanent magnet 7 on rotor core 8 circumferential surfaces, the interior stator winding 6 of wire casing that is arranged on the stator core 5 of rotor core 8 peripheries and is arranged on stator core 5 according to an exemplary embodiment of the present invention.
Cooling system comprises air cooling system and water-cooling system according to an exemplary embodiment of the present invention.Respectively air cooling system and water-cooling system are described below in conjunction with attaching Fig. 1 and 2.
Fig. 1 is the air cooling system sketch map in the magneto cooling system.Comprise the air-cooled passage that is arranged at magneto inside and make cold wind cycle through the air-cooled cycling element 12 of the air-cooled passage in the motor according to the air cooling system in the cooling system of the embodiment of the invention.
According to the example shown in Fig. 1, air-cooled cycling element 12 comprises air-air heat exchanger 1, interior circulating fan 2, the outer circulation blower fan 3 that is arranged on the motor outside.Outer circulation blower fan 3 is arranged on the end of air-air heat exchanger 1, is used for the cooling duct that blows cold air gets into air-air heat exchanger 1.Interior circulating fan 2 is arranged on the sidepiece of air-air heat exchanger 1, is used for the hot-air that in motor 13, absorbs heat is extracted out, becomes cold air thereby carry out heat exchange through cooling duct, gets into motor 13 once more and circulates next time.In this exemplary embodiment, heat exchanger 1 is arranged on magneto 13 tops, and obviously, heat exchanger 1 also can be arranged on other position of motor 13.Though in this embodiment, heat exchanger 1 is air-air heat exchanger,, also can adopt sky-water/liquid heat exchanger etc., that is, can be other any type of cooling fluid in the cooling duct.
Be arranged on magneto 13 inner air-cooled passages and comprise rotor field spider axial ventilation ditch 11, rotor radial air duct 10, stator radial ducts 9.Rotor field spider axial ventilation ditch 11 is arranged in the rotor field spider vertically, is used for the axial lead cooling air along motor.Rotor radial air duct 10 penetrates rotor core 8 along rotor radial, between adjacent permanent magnet 7, passes, and is used for passing rotor core 8 along radial direction direct cooled air.Stator radial ducts 9 is arranged in the stator core 5, along radial penetration stator core 5, is used for radially direct cooled air, thereby stator winding 6 and stator core 8 are lowered the temperature.
During magneto 13 operations; Circulating fan 2 in starting makes the cooling air end of cooling stator winding 6 earlier, wherein one the road enters into rotor field spider axial ventilation ditch 11 then; And after cooling off via 10 pairs of permanent magnets 7 of rotor radial air duct; The cooling air that gets into air gap with another road again converges, and the cooling air after converging continues to accomplish the cooling to stator winding 6 and stator core 8 along stator radial ducts 9, and the hot-air of finally accomplishing after the heat exchange gets in the absolutely empty heat exchanger 1.After outer circulation blower fan 3 starts; Extraneous cold wind gets into the cooling duct that places in the absolutely empty heat exchanger 1; And the hot-air of the enclosure interior through tube wall and absolutely empty heat exchanger 1 carries out heat exchange; Thereby with the hot-air cooling, cooled air gets into motor once more and arrives motor stator winding 6 ends, thereby has accomplished an air cooling circulation.
In this exemplary embodiment, cooling air is blown over from the two ends of motor earlier, can effectively cool off stator winding end; Again through rotor ventilation ditch and rotor radial air duct; But cooled rotor is unshakable in one's determination and to the very sensitive permanent magnet of temperature, pass through the stator air duct at last, cooling stator winding and iron core.Cooling air has been taken away heat and the heat of a part of stator winding and stator core of heat, rotor core and the permanent magnet of most stator winding end.Owing to permanent magnet has been carried out abundant cooling, therefore, can prevent effectively that too high working temperature from causing the reduction of permanent magnet magnetic performance.
As the another kind of modified example of air cooling system, the absolutely empty heat exchanger 1 among Fig. 1 also can be cancelled, and the substitute is the ventilation type of cooling of open type.In addition, interior circulating fan and outer circulation blower fan in the exemplary embodiment of the present also can be cancelled, and adopt the form of armature spindle band fan to blow to motor the motor internal air outside.That is to say that those skilled in the art can arbitrarily arrange the cold wind cycling element, as long as can provide cold wind to get into the air-cooled passage of motor.
Fig. 2 is the water-cooling system sketch map in the cooling system according to an exemplary embodiment of the present invention.Water-cooling system is mainly by cooling water pipe 4 (see figure 1)s and cold water cycling element.
As shown in Figure 1, cooling water pipe 4 is arranged on the inside of stator core 5, for example, is arranged in the stator core yoke portion 19.Cooling water pipe 4 can be along the stator shaft orientation setting.Fig. 3 shows the sketch map of the stator punching of permagnetic synchronous motor according to an exemplary embodiment of the present invention.As shown in the figure, be provided with a plurality of cooling water pores in stator core yoke portion 19, be used to install cooling water pipe 4.Fig. 4 shows the rotor of motor and the three-dimensional cutaway view of stator according to an exemplary embodiment of the present invention.As shown in Figure 4, cooling water pipe 4 is coiled in the inside of stator core 5.
The cold water cycling element mainly comprises pipeline 14, water pump 15, the sky-water heat exchanger 16 that is connected with cooling water pipe 4.
Cooling water pipe 4 is formed a water-cooling circulating system through pipeline 14, pump 15, sky-water heat exchanger 16.When water pump 15 started, cooling water entered in the cooling water pipe 4 of permanent magnet motor stator iron core, became hot water after the heat conduction completion through the cooling water pipe tube wall and the heat exchange of stator core 5.Hot water enters in the sky water heat exchanger 16 from motor 13 outflows and through pipeline 14, by returning motor 13 inside after the wind outside cooling, circulates thereby accomplish a water-cooled.
Cooling water pipe 4 can adopt antiseptic property copper material preferably, and copper pipe is expanded in the into stator core 5, and copper pipe is combined closely with unshakable in one's determination 5, increases thermal conductivity, is beneficial to the transmission of heat.Cooling water flows in cooling water pipe 4, through stator core 5, takes away the heat of iron core 5 and winding 6.
In addition; Water-cooled pipeline 4 among the present invention can adopt the bellows with big area of dissipation; With the water route structure that constitutes by multichannel water pipe and water cavity in its alternative the foregoing description; The structure of effective simplification water-cooling system reduces technology difficulty, reaches the purpose that reduces production costs and improve radiating efficiency simultaneously.
In water-cooling system according to an exemplary embodiment of the present invention; In the magneto outer setting free water heat exchanger is arranged; Make the internal heat of motor take in the outside empty water heat exchanger by water-cooling system; And the empty hydrothermal exchange of the air dielectric in this completion and external circulating system, and then get back to motor internal, thus constantly the motor heat is taken away.Equally, the empty water heat exchanger 16 here only is for example, obviously when adopting this type of cooling on the non-wind-driven generator, also can adopt water-water heat exchanger.Equally, those skilled in the art also can change the cooling water that flows through cooling water pipe 4 into other forms of coolant, and therefore, the change of this coolant is the replacement that is equal to that belongs to water-cooled medium among the present embodiment property embodiment.
Compare with the simple water-cooling system in the prior art, the cooling system that empty according to an exemplary embodiment of the present invention water mixes also cools off through the permanent magnet of air cooling system to motor internal when utilizing water-cooling system that motor is directly cooled off simultaneously; Avoid irreversible loss of excitation of permanent magnet or magnetic to reduce, and it is simple in structure, water-cooled and air cooling act on down simultaneously simultaneously; Generator unit stator is cooled off; Reduce motor size, can take away the heat that produces in the generator course of work expeditiously, improved the cooling effect of motor greatly; Therefore, can make motor carry out work steadily in the long term.
According to exemplary embodiment of the present invention, because motor internal possesses air-cooled passage and cooling passage simultaneously, therefore, can carry out air-cooled and liquid cooling to motor simultaneously, thereby realize fast and effectively cooling.
Based on above-mentioned exemplary embodiment, those skilled in the art should be able to expect that the motor of other types also can adopt cooling system of the present invention, with design of electrical motor for possessing wind path structure and liquid line structure simultaneously.Therefore, design of the present invention is not limited to this electric machine structure of internal rotor external stator.Below, be example with external rotor internal stator motor, the concise and to the point cooling system of describing according to second exemplary embodiment of the present invention.
In a second embodiment; It still is example with the magneto; Said magneto is the internal stator external rotor electric machine; Particularly, said magneto comprises stator core, is arranged on stator winding in the wire casing of stator core, is arranged on the rotor core of stator core periphery and is attached to the inboard permanent magnet of rotor core.Cooling system according to second embodiment of the invention comprises air cooling system and water-cooling system.Compare with the first embodiment of the present invention, be that according to the difference of the cooling system of second embodiment air-cooled passage in the magneto changes to some extent.Particularly, said air-cooled passage comprises: be arranged on stator shaft orientation ventilation ducts, stator radial ducts, rotor radial air duct on the stator shaft orientation.Said stator shaft orientation ventilation ducts is arranged on the stator shaft orientation, is used for cold wind is introduced stator core inside.The stator radial ducts is disposed radially in stator core, is used for cold wind is radially passed stator core from stator core inside, arrives the rotor radial air duct then.Said rotor radial air duct is disposed radially on rotor, and passes between the permanent magnet, and be used for the inboard cold wind of guided rotor and pass rotor, thus the cooling permanent magnet, thus the irreversible loss of excitation of avoiding permanent magnet possibly cause owing to temperature rise.
Except above-mentioned air-cooled passage, the miscellaneous part of the cooling system of the second embodiment of the present invention can be identical with the parts in the cooling system of first embodiment, therefore, repeats no more.
Though, be that example is described in an embodiment of the present invention with the magneto,, not and mean that cooling system of the present invention only limits to be used for magneto.Can be applied to the motor of other types according to cooling system of the present invention.
The cooling system that the present invention adopts empty water to mix cools off motor and its inside; Compare and only adopt simple air cooling system, can significantly reduce the temperature rise of electric machine iron core and winding, compare and only adopt simple water-cooling system; Can effectively reduce the motor temperature rise of end windings and parts, guarantee running reliability of motor.
In addition, adopt simultaneously at magneto under the situation of air cooling, water-cooling system, not only can improve motor heat load, reduce motor size and its weight, and make the motor compact overall structure, practice thrift the motor manufacturing cost.
Adopt the motor of cooling system of the present invention can be widely used in the industrial equipments such as turbo generator, hydraulic generator, wind-driven generator, thereby satisfy these equipment for promoting the motor internal cooling effect and dwindling the requirement of motor size.

Claims (18)

1. motor; Said motor comprises rotor core, is installed in the magnet on the rotor core outer surface, the interior stator winding of wire casing that is arranged on the stator core of rotor core periphery and is arranged on stator core; It is characterized in that said motor comprises the air-cooled passage that is arranged in stator and the rotor and is arranged on the liquid cooling passage in the stator.
2. motor as claimed in claim 1; It is characterized in that; Said air-cooled passage comprises the axial ventilation ditch that is arranged in the rotor field spider, is arranged on the rotor radial air duct in the rotor core; Be arranged on the stator radial ducts in the stator core, fluid is communicated with between said axial ventilation ditch, rotor radial air duct and the stator radial ducts, and said liquid cooling passage is to be arranged on the interior cooling fluid pore of stator core.
3. motor according to claim 2 is characterized in that, said cooling fluid pore is arranged on stator core yoke portion.
4. motor according to claim 3 is characterized in that, is provided with coolant pipe in the cooling fluid pore, and said coolant pipe is a copper pipe.
5. according to each the described motor among the claim 1-4, it is characterized in that said motor is a magneto.
6. according to each described motor among the claim 1-4, it is characterized in that said liquid cooling passage is a water-cooling channel.
7. motor; Said motor comprises stator core, be arranged on stator winding in the wire casing of stator core, be arranged on the rotor core of stator core periphery and be attached to the inboard magnet of rotor core; It is characterized in that; It is characterized in that said motor comprises the air-cooled passage that is arranged in stator and the rotor and is arranged on the liquid cooling passage in the stator.
8. motor according to claim 7; It is characterized in that; Said air-cooled passage comprises and is arranged on the inboard stator shaft orientation ventilation ducts of stator core, is arranged on the stator radial ducts in the stator core and is arranged on the rotor radial air duct in the rotor core; Fluid is communicated with between said stator shaft orientation ventilation ducts, stator radial ducts and the rotor radial air duct, and said liquid cooling passage is the cooling fluid pore that is arranged in the stator core.
9. motor according to claim 8 is characterized in that, said cooling fluid pore is arranged on stator core yoke portion.
10. motor according to claim 8 is characterized in that, is provided with coolant pipe in the cooling fluid pore, and said coolant pipe is a copper pipe.
11. each the described motor according among the claim 7-10 is characterized in that said motor is a magneto.
12., it is characterized in that said liquid cooling passage is a water-cooling channel according to each described motor among the claim 7-10.
13. each cooling system of motor that is used for claim 1-12; Said cooling system comprises air-cooled cycling element and liquid cooling cycling element; Said air-cooled cycling element is used to make cold wind to circulate and heat exchange through the air-cooled passage of motor, and said liquid cooling cycling element is used for that cooling fluid is sent into the liquid cooling passage and circulates and heat exchange.
14. cooling system according to claim 13 is characterized in that, said air-cooled cycling element comprises first circulating fan that is arranged on the first outside heat exchanger of motor and makes cold wind circulation entering motor.
15. cooling system according to claim 14 is characterized in that, said first heat exchanger is air-air heat exchanger or sky-water heat exchanger.
16. cooling system according to claim 13 is characterized in that, said liquid cooling cycling element comprises and the channel attached pump of liquid cooling and second heat exchanger.
17. cooling system according to claim 16 is characterized in that, said second heat exchanger is sky-water heat exchanger or water-water heat exchanger.
18. cooling system according to claim 13 is characterized in that, the cooling fluid that adopts is a water.
CN2011102993443A 2011-09-29 2011-09-29 Motor and cooling systeem thereof Pending CN102377286A (en)

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Cited By (15)

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CN103595189A (en) * 2013-11-05 2014-02-19 北京交通大学 Annular water internal cooling structure laid in stator ventilation ditch
CN105790509A (en) * 2016-04-07 2016-07-20 重庆大学 Micro-flow-path-channel-based auxiliary cooling system for operation power apparatus
CN107070021A (en) * 2017-02-24 2017-08-18 康富科技股份有限公司 A kind of iron core type water-cooled generator
CN107196461A (en) * 2017-07-24 2017-09-22 北京金风科创风电设备有限公司 Composite cooling system
WO2017185543A1 (en) * 2016-04-25 2017-11-02 现代精密塑胶模具(深圳)有限公司 Injection molding machine
CN108429403A (en) * 2018-05-21 2018-08-21 广东上水能源科技有限公司 A kind of motor based on coolant liquid is from driving cooling structure
CN108882640A (en) * 2018-07-14 2018-11-23 许昌学院 A kind of virtual synchronous power generator
CN109474113A (en) * 2018-09-06 2019-03-15 新疆金风科技股份有限公司 Motor and wind power generating set
CN109511246A (en) * 2018-12-21 2019-03-22 北京中热信息科技有限公司 A kind of heat pipe air conditioner formula indirect evaporation cooling system
CN110212700A (en) * 2019-04-26 2019-09-06 西安中车永电捷力风能有限公司 A kind of cooling air duct structure of doubly-fed wind turbine
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CN110601408A (en) * 2019-09-30 2019-12-20 长江勘测规划设计研究有限责任公司 Hydro-turbo generator set stator winding internal cooling circulation system based on hydrogen cooling technology
CN110676980A (en) * 2019-10-31 2020-01-10 浙江大学 Cooling device, stator and wind driven generator
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Publication number Priority date Publication date Assignee Title
CN103595189A (en) * 2013-11-05 2014-02-19 北京交通大学 Annular water internal cooling structure laid in stator ventilation ditch
CN103595189B (en) * 2013-11-05 2016-01-13 北京交通大学 Be laid in the ring-type internal water cooling structure of stator ventilation ducts
CN105790509A (en) * 2016-04-07 2016-07-20 重庆大学 Micro-flow-path-channel-based auxiliary cooling system for operation power apparatus
WO2017185543A1 (en) * 2016-04-25 2017-11-02 现代精密塑胶模具(深圳)有限公司 Injection molding machine
CN107070021A (en) * 2017-02-24 2017-08-18 康富科技股份有限公司 A kind of iron core type water-cooled generator
CN107196461A (en) * 2017-07-24 2017-09-22 北京金风科创风电设备有限公司 Composite cooling system
CN108429403A (en) * 2018-05-21 2018-08-21 广东上水能源科技有限公司 A kind of motor based on coolant liquid is from driving cooling structure
CN108429403B (en) * 2018-05-21 2024-05-28 广州亿智环保科技有限公司 Motor self-driven cooling structure based on cooling liquid
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