CN209184407U - Rotor vacuumizes cooling high-speed permanent magnet motor system - Google Patents
Rotor vacuumizes cooling high-speed permanent magnet motor system Download PDFInfo
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- CN209184407U CN209184407U CN201821798704.8U CN201821798704U CN209184407U CN 209184407 U CN209184407 U CN 209184407U CN 201821798704 U CN201821798704 U CN 201821798704U CN 209184407 U CN209184407 U CN 209184407U
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- rotor
- permanent magnet
- stator
- heat
- magnet motor
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Abstract
Cooling high-speed permanent magnet motor system is vacuumized the utility model discloses a kind of rotor.When motor work, region occupied by the air between rotor and stator is completely closed, and is in vacuum state.It is provided with vacuum pump, solenoid valve and vacuum meter on the outside of this regional space, and is connected by pipeline with this confined space.Regulate and control the air vacuum degree inside motor gas-gap by vacuum pump, the wind moussing loss of high speed permanent magnet motor rotor can be greatly reduced, and wind moussing loss can regulate and control according to rotor speed.The wind of rotor permanent magnet heat of rubbing can pass to stator by convection current and radiation, export via stator cooling system.By this cooling scheme, it can effectively solve the problems, such as that high-speed permanent magnet motor volume becomes small, heat dissipation is increasingly difficult, rotor temperature rise is locally excessively high, particularly suitable for the permanent magnet high temperature loss of excitation in magneto is effectively solved the problems, such as.
Description
Technical field
The utility model belongs to technical field of motors, and cooling high-speed permanent magnetic is vacuumized more particularly, to a kind of rotor
Electric system.
Background technique
The huge advantage that high-speed motor has power density big, can effectively save material.Since rotary inertia is smaller,
So dynamic response is very fast, if high-speed motor and load are connected directly, traditional mechanical variable speed device can be saved, to mention
High transmission system efficiency, therefore the research of high-speed motor and application meet the economic development needs of energy-saving and emission-reduction, high speed grinding machine,
The fields such as flywheel energy storage, aerospace have a extensive future.As Large-power High-Speed and super high speed motor design basis are theoretical
Development, development and needs around the independent current sources such as naval vessel, aircraft and drive system and renewable energy system, high speed
The research of motor has become the research hotspot in International Power field at present, while as the typical electric machine run under extreme condition
One of system becomes China's Electro Scientific and the priority research areas of engineering field in recent years.
As one of the key technology of high-speed motor research, high-speed motor loss calculation model and guarantee motor proper temperature
The research of the cooling technology of horizontal high efficiency and heat radiation is on the one hand closely related with the efficiency of high-speed motor, another aspect and high-speed motor
Safety and reliability be closely related.The increase of magnetic flux alternative frequency results in substantially in high-speed motor winding current and iron core
The increase of electrical loss and high frequency added losses, especially because wind moussing loss and bearing loss that rotor high speed rotation generates exist
Occupy suitable specific gravity (up to 40%) and closely related with the speed of service of motor and cooling condition thus difficult in total losses
Accurately to calculate.So, the reduction of bring geometric dimension is substantially improved in high-speed motor power density, so that effective heat dissipation
Become a very important key technology in high-speed motor design with the type of cooling, needs logical under the premise of being lost increased
It crosses smaller overall heat dissipation area and takes away heat caused by these losses.
The cooling technology of high-speed permanent magnet motor must be based on the design feature of its own conscientiously to examine closely.In order to guarantee
Rotor has enough rigidity and higher critical speed, and the rotor of high-speed permanent magnet motor is generally slender type, rotor axial
It can not be too long；In order to reduce centrifugal force, root diameter should select the smaller the better, however, to ensure that there is sufficiently large space to place
Permanent magnet and shaft, root diameter but can not be too small.Therefore, in order to ensure high speed permanent magnet motor rotor has enough mechanicalnesses
Can, cooling channel can not be laid in internal rotor.Although compared with stator core loss and winding copper loss, rotor eddy current loss
Very little, but rotor radiating condition is poor, rotor eddy current loss may but cause the higher temperature rise of rotor.Due to permanent magnet material
Performance is related with temperature, lower especially for curie point, conductivity is higher, the biggish NdFeB material of temperature coefficient, excessively high
Temperature motor performance can be made to decline, or even cause the demagnetization of permanent magnet and damage motor.
By the differentiating forms of cooling medium, the mode being used widely in terms of motor cooling at present includes air cooling, gas
Liquid cooling and liquid cooling three categories.It is air-cooled since structure is simple, does not need additional seal device under gas cooling especially atmospheric pressure
And it is pollution-free, there is natural advantage in motor is cooling, frequently as the cooling preferred option of motor, gas cooling medium includes
Air and hydrogen etc.；Liquid cooling medium (including the single-phase cooling technology of liquid and liquid phase-change cooling technology) has in water, oil, fluorine
High class medium and Novel pollution-free compounds fluorine carbon medium.Although air-cooled mode structure is simple, operation and maintenance are convenient, by electricity
The limitation of machine revolving speed and capacity and with the bulky of capacity electrical machinery；Hydrogen-cooled and water cooling efficiency is much higher than air-cooled and motor volume phase
Should be smaller, but structure is complicated, need to increase separately hydrogen system and water system, and operation and maintenance amount is big；Based on liquid working substance phase transformation
Evaporation cooling technique utilize fluid vaporization latent heat, have that heat exchange efficiency is high, motor various pieces temperature rise is low, uniformity of temperature profile
And without the excellent cooling characteristics such as local hot spot, there is good application potential, but this method is in the stream of vehicle repair major fluid
Accurate theory is also lacked in the processing of dynamic characteristic and heat transfer, novel environmental-friendly cooling medium still needs further to be researched and developed
The stable physical data with determination.
From the point of view of the cooling way used by the high-speed permanent magnet motor of the studies above, rotor is cooling still to use atmosphere mostly
The forced ventilation of pressure is cooling, and stator cooling is then based on the water cooling at back.For high-speed motor, very due to rotor speed
Height, the cube of air wind moussing loss and rotor speed when Gas Gap Pressure is near atmospheric pressure, air gap air pressure
The first power of first power and rotor surface roughness is directly proportional, so that the volume heat generation rate of air dielectric is very in air gap
Greatly, numerical value can account for the suitable specific gravity (up to 40%) of total losses, this is undoubtedly the high speed in air gap operated at atmospheric pressure
The problem that motor must be paid attention to and overcome when designing cooling way.For high-speed permanent magnet motor, due to can not be in rotor
Upper arrangement cooling channel, and by increasing surface roughness (including surface fluting or setting protrusion) Lai Qianghua air and rotor
It will lead to wind when the heat convection on surface to rub sharp increase；Further for taking away increased wind moussing loss, it is necessary to increase cooling empty
The flow of gas；And the flow for increasing cooling air is equivalent to need to increase Gas Gap Pressure, so that wind be caused to rub increase again.Cause
This, reduce the rotor surface roughness of high-speed permanent magnet motor as far as possible to reduce wind moussing loss, so be unfavorable for turning again
The heat convection in sublist face and air.
Summary of the invention
Goal of the invention: the utility model provides a kind of rotor and vacuumizes cooling high-speed permanent magnet motor system, to have
Effect solution high-speed permanent magnet motor is small in size, high speed permanent magnet motor rotor wind moussing loss is high, heat dissipation is difficult, rotor temperature rise part
Excessively high problem.
Technical solution: in order to achieve the above objectives, following technical solution can be used in the utility model:
A kind of rotor vacuumizes cooling high-speed permanent magnet motor system, including motor, vacuum pump, control vacuum pump opening and closing
Solenoid valve, vacuum meter, heat pipe condenser section；Motor include casing, the rotor in casing and stator, be located at stator and rotor it
Between and by cyclic annular distance sleeve that stator wraps, be located at distance sleeve both ends and distance sleeve connect sealing with stator cage
End cover, stator is wrapped in confined space by the casing, distance sleeve, end cover jointly；The rotor includes
Shaft, rotor core, permanent magnet；The both ends of shaft are mounted on the both ends of casing, and rotor core covers in shaft, the embedding patch of permanent magnet
On the outer round surface of rotor core；Stator includes stator core, stator winding, and stator winding is arranged in stator core；Institute
State the space that rotor is accommodated in vacuum pump connection casing；
The casing lower part is equipped with the inlet being connected to the confined space；Casing top is equipped with and the confined space
The steam (vapor) outlet of connection；The steam (vapor) outlet is connect with heat pipe condenser section, and heat pipe condenser section, which returns, is attached to inlet formation condensation
Circuit.
Further, distance sleeve is mounted on the inner circle of stator core, and helicla flute, straight trough are used on the inside of the distance sleeve
Or snakelike conduit, distance sleeve inside are directly contacted with liquid organic working medium.
Further, several high wings are set on the outside of the heat pipe condenser section, heat friendship directly occurs with ambient air
It changes or is radiated by the forced convertion of the fan offer of outside setting.
Further, the heat pipe condenser section is preferably vertically arranged is flowed back with gravity using working medium, or in pipeline
Inside spray metal particle realizes the reflux of condensation working medium by liquid infiltration phenomenon
Further, preliminary filling heat-pipe working medium in the heat pipe condenser section, the heat-pipe working medium are entered in motor by inlet；
The preferred distilled water of heat-pipe working medium or acetone.
Further, it is additionally provided with protective case on rotor, which covers the periphery rotor in permanent magnet；Protective case is adopted
With alloy sleeve or carbon fiber sheath.
The utility model has the advantages that regulate and control the air vacuum degree inside motor gas-gap in the utility model by vacuum pump, it can be substantially
Reduce the wind moussing loss of high speed permanent magnet motor rotor.The wind of rotor permanent magnet rubs heat can be given by convection current and radiation transmitting
Son is exported via stator cooling system, is radiated by heat pipe condenser section.In general, by the utility model it is contemplated more than
Technical solution compared with prior art, has following significant beneficial effect,
1, the rotor cooling for high-speed permanent magnet motor described in the utility model vacuumizes cooling system, in conjunction with stator exterior
Radiating by detached heat pipe cooling system, the magnitude of rotor wind moussing loss can be greatly reduced, and the work of vacuum pump can be passed through
Make effectively to be adjusted.
2, separate heat pipe utilizes the Phase cooling of liquid working substance, can be the heat dissipation of electric machine rotor system high efficiency samming
Cooling scheme, while the arrangement of separate heat pipe condensation segment is not influenced by motor body, can be worked completely according to motor
Environment is configured, and has good technology flexible.
3, compared with the pipeline inner-cooled evaporative cooling system of conventional totally-enclosed circulation, the pipeline and piece-ups of required laying
Amount is few, and cooling medium is sealed in stator confined space by the seal isolation sleeve of stator inner circle setting, therefore each pipeline and connects
The sealing performance and technology difficulty of head require lower.
Detailed description of the invention
Fig. 1 is that rotor constructed by the preferred embodiment according to the utility model vacuumizes cooling high-speed permanent magnet motor system
System structural schematic diagram.
Fig. 2 is the structural profile illustration of motor part in the utility model.
Wherein, 1. vacuum pump, 2. solenoid valves, 3. vacuum meters, 4. rotors, 5. motor stators, the condensation of 6. separating heat tubes
Section, 21. stator cores, 22. stator winding, 11. rotor permanent magnets, 12. rotor cores, 801 and 806. stator steam (vapor) outlets,
802. end part seal end caps, 803. stator distance sleeves, the inlet of 804 and 805. stator bottoms, 807. casings.
Specific embodiment
As shown in Figs.1 and 2, the utility model discloses a kind of rotor and vacuumizes cooling high-speed permanent magnet motor system
System, solenoid valve 2, the vacuum meter 3, heat pipe condenser section 6 being opened and closed including motor, vacuum pump 1, control vacuum pump；Motor includes casing
807, the rotor 4 in casing 807 and stator 5, cyclic annular be isolated between stator 5 and rotor 4 and by what stator wrapped
Sleeve 803, the end cover 802 for connecting sealing with stator cage positioned at distance sleeve both ends and by distance sleeve, the casing,
Stator is wrapped in confined space by distance sleeve, end cover jointly；The rotor includes shaft 13, rotor core 12, forever
Magnet 11；The both ends of shaft 13 are mounted on the both ends of casing 807,12 sets of rotor core in shaft 13, permanent magnet 11 is embedding to be attached to
On the outer round surface of rotor core 12；Stator includes stator core 12, stator winding 22, and stator winding 22 is arranged in stator iron
On the heart 21；The vacuum pump 1 is connected to the space that rotor is accommodated in casing 807.It wherein is also provided with protective case on rotor, the guarantor
Sheath covers the periphery rotor in permanent magnet；Protective case uses alloy sleeve or carbon fiber sheath.
The casing lower part is equipped with the inlet 805 being connected to the confined space；Casing top be equipped with it is described closed
The steam (vapor) outlet 801,806 of space connection；The steam (vapor) outlet is connect with heat pipe condenser section 6, heat pipe condenser section 6 return be attached into
Liquid mouth 804,805 forms condensing circuit.Preliminary filling heat-pipe working medium in the heat pipe condenser section, the heat-pipe working medium by inlet 804,
805 enter in motor.Sealing forms entire separate-type heat pipe system after being filled with a certain amount of heat-pipe working medium.Heat-pipe working medium is preferred
Distilled water or acetone.Several high wings are set on the outside of the heat pipe condenser section 6, heat exchange directly occurs with ambient air
Or it is radiated by the forced convertion of the fan offer of outside setting.The heat pipe condenser section 6 is preferably vertically arranged to utilize work
The gravity of matter passes through the reflux of liquid infiltration phenomenon realization condensation working medium to flow back, or in insides of pipes spray metal particle.
Distance sleeve 803 is mounted on the inner circle of stator core 21, and helicla flute, straight trough are used on the inside of the distance sleeve 803
Or snakelike conduit, 803 inside of distance sleeve are directly contacted with heat-pipe working medium.
When motor works, the wind moussing loss of rotor 4 regulates and controls the air vacuum degree inside air gap by vacuum pump 1 substantially to drop
Low, the wind of rotor permanent magnet heat of rubbing can pass to stator 5 by convection current and radiation, export via 5 cooling system of stator.
Cooling is carried out to stator using separate heat pipe, the stator 5 of high-speed permanent magnet motor is the evaporator section of separate heat pipe,
The calorific value of electric machine rotor makes liquid phase-change working medium that evaporation or vaporization occur, and the working medium for going upward to heat pipe condenser section 6 is steamed
Vapour is condensed into liquid under the cooling on the outside of condensation segment and flows back along wall surface.
The utility model implement the technical solution method and approach it is very much, the above is only the utility model
Preferred embodiment.It should be pointed out that for those skilled in the art, not departing from the utility model principle
Under the premise of, several improvement can also be made, these improvement also should be regarded as the protection scope of the utility model.In the present embodiment not
The available prior art of specific each component part is realized.
Claims (6)
1. a kind of rotor vacuumizes cooling high-speed permanent magnet motor system, which is characterized in that including motor, vacuum pump (1), control
Solenoid valve (2), the vacuum meter (3), heat pipe condenser section (6) of vacuum pump opening and closing；Motor includes casing (807), is located at casing (807)
Interior rotor (4) and stator (5), between stator and rotor and by cyclic annular distance sleeve (803) that stator wraps, be located at
Distance sleeve is simultaneously connect with stator cage the end cover (802) of sealing by distance sleeve both ends, the casing, distance sleeve,
Stator is wrapped in confined space by end cover jointly；The rotor includes shaft (13), rotor core (12), permanent magnet
(11)；The both ends of shaft (13) are mounted on the both ends of casing (807), and rotor core (12) covers on shaft (13), permanent magnet
(11) on the embedding outer round surface for being attached to rotor core (12)；Stator includes stator core (21), stator winding (22), stator winding
(22) it is arranged on stator core (21)；The space of rotor is accommodated in vacuum pump (1) connection casing (807)；
The casing lower part is equipped with the inlet (805) being connected to the confined space；Casing top is equipped with and the confined air
Between the steam (vapor) outlet (801) that is connected to；The steam (vapor) outlet is connect with heat pipe condenser section (6), heat pipe condenser section (6) return be attached into
Liquid mouth (805) forms condensing circuit.
2. rotor according to claim 1 vacuumizes cooling high-speed permanent magnet motor system, it is characterised in that: distance sleeve
It is mounted on the inner circle of stator core (21), uses helicla flute, straight trough or snakelike conduit on the inside of the distance sleeve, in distance sleeve
Side is directly contacted with liquid organic working medium.
3. rotor according to claim 1 or 2 vacuumizes cooling high-speed permanent magnet motor system, it is characterised in that: described
Several high wings are set on the outside of heat pipe condenser section, the fan that heat exchange directly occurs with ambient air or is arranged by outside
The forced convertion of offer is radiated.
4. rotor according to claim 3 vacuumizes cooling high-speed permanent magnet motor system, it is characterised in that: the heat pipe
Condensation segment is vertically arranged with the gravity using working medium to flow back, or is infiltrated now in insides of pipes spray metal particle by liquid
Reflux as realizing condensation working medium.
5. rotor according to claim 2 vacuumizes cooling high-speed permanent magnet motor system, it is characterised in that: the heat pipe
Preliminary filling heat-pipe working medium in condensation segment, the heat-pipe working medium are entered in motor by inlet (805)；Heat-pipe working medium be distilled water or
Acetone.
6. rotor according to claim 1 or 2 vacuumizes cooling high-speed permanent magnet motor system, it is characterised in that: rotor
On be additionally provided with protective case, which covers the periphery rotor in permanent magnet；Protective case is safeguarded using alloy sleeve or carbon fiber
Set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821798704.8U CN209184407U (en) | 2018-11-02 | 2018-11-02 | Rotor vacuumizes cooling high-speed permanent magnet motor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821798704.8U CN209184407U (en) | 2018-11-02 | 2018-11-02 | Rotor vacuumizes cooling high-speed permanent magnet motor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209184407U true CN209184407U (en) | 2019-07-30 |
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ID=67363139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821798704.8U Expired - Fee Related CN209184407U (en) | 2018-11-02 | 2018-11-02 | Rotor vacuumizes cooling high-speed permanent magnet motor system |
Country Status (1)
| Country | Link |
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| CN (1) | CN209184407U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412341A (en) * | 2018-11-02 | 2019-03-01 | 南京林业大学 | A kind of rotor vacuumizes cooling high-speed permanent magnet motor system |
| CN111342615A (en) * | 2020-03-30 | 2020-06-26 | 中国科学院电工研究所 | Stator core liquid cooling system |
| CN112814935A (en) * | 2021-02-05 | 2021-05-18 | 陈亮 | High-speed air suspension compressor for fuel cell, fuel cell system and vehicle |
-
2018
- 2018-11-02 CN CN201821798704.8U patent/CN209184407U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412341A (en) * | 2018-11-02 | 2019-03-01 | 南京林业大学 | A kind of rotor vacuumizes cooling high-speed permanent magnet motor system |
| CN111342615A (en) * | 2020-03-30 | 2020-06-26 | 中国科学院电工研究所 | Stator core liquid cooling system |
| CN112814935A (en) * | 2021-02-05 | 2021-05-18 | 陈亮 | High-speed air suspension compressor for fuel cell, fuel cell system and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201102 Address after: 210000 810b, building B, building 4, Nanjing Baixia high tech Industrial Park, No. 6, Yongzhi Road, Qinhuai District, Nanjing, Jiangsu Province Patentee after: Nanjing kulinmei Electromechanical Technology Co.,Ltd. Address before: Nanjing City, Jiangsu province 210037 Longpan Road No. 159 Patentee before: NANJING FORESTRY University |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190730 Termination date: 20211102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |