CN107749678B - A kind of permanent magnet machine rotor sheath cooling structure device - Google Patents
A kind of permanent magnet machine rotor sheath cooling structure device Download PDFInfo
- Publication number
- CN107749678B CN107749678B CN201711203995.1A CN201711203995A CN107749678B CN 107749678 B CN107749678 B CN 107749678B CN 201711203995 A CN201711203995 A CN 201711203995A CN 107749678 B CN107749678 B CN 107749678B
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- Prior art keywords
- rotor
- permanent magnet
- jacket
- rotor core
- core
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The embodiment of the invention provides a kind of permanent magnet machine rotor sheath cooling structure devices.The device includes: rotor jacket, permanent magnet, rotor axial ventilating duct, magnetic bridge, rotor core, rotor shaft；Rotor shaft is located at the center of device, V-type permanent magnet is evenly distributed in rotor core, rotor jacket is circumferentially uniformly distributed the buckle of several trapezoidals or dovetail type, rotor core is uniformly arranged along the circumference several trapezoidal card slot mouths, it is interference fitted between rotor jacket and rotor core, air duct portions between rotor jacket and rotor core constitute rotor axial ventilating duct, there are the magnetism guiding access of protrusion between rotor jacket and rotor core, magnetic bridge is placed in the both ends of every permanent magnet, rotor axial ventilating duct is set in the corresponding rotor core in permanent magnet upper end.The present invention is under aerofoil fan or centrifugal fan effect, the permanent magnetism temperature that can be effectively reduced in rotor core, and then improves the security reliability of motor.
Description
Technical field
The present invention relates to magneto technical field more particularly to a kind of permanent magnet machine rotor sheath cooling structure devices.
Background technique
High-speed permanent magnet motor has many advantages, such as high-efficient, power density is big, small in size, has become state in recent years
One of inside and outside research hotspot.In high-speed rotation process, centrifugal force is larger for high-speed permanent magnet motor, in order to rotor core and permanent magnetism
Body is protected, it is necessary to increase protective case outside rotor.
The method that a kind of pair of rotor core and permanent magnet in the prior art are protected are as follows: add one outside rotor core
High-intensitive non-magnetic alloy protective case.But alloy protecting measure can generate biggish eddy-current loss in protective case, therefore protect
Increasing for sheath can carry out biggish difficulty to the heat-radiation belt of motor.And excessively high temperature will lead to the generation of the permanent magnet in rotor
The irreversible loss of excitation of high temperature, so that the performance of motor declines, or even loses driving force completely.
Thus, the heat-sinking capability of motor protection case how is improved, rotor temperature rise is reduced, becomes the emphasis studied at present.
Summary of the invention
The embodiment provides a kind of permanent magnet machine rotor sheath cooling structure devices, effectively to disperse rotor shield
Set and the heat on rotor core, reduce the temperature rise of rotor.
To achieve the goals above, this invention takes following technical solutions.
The embodiment provides a kind of permanent magnet machine rotor sheath cooling structure devices characterized by comprising
Rotor jacket, permanent magnet, rotor axial ventilating duct, magnetic bridge, rotor core, rotor shaft；The rotor shaft is located at device
Center, the permanent magnet is evenly distributed in the rotor core, and buckle, the rotor are arranged on the rotor jacket
Card slot mouth is set on iron core, the buckle of the rotor jacket is corresponding with the card slot mouth of the rotor core and is mutually interference fitted,
Air duct between the rotor jacket and the rotor core constitutes the rotor axial ventilating duct, and the magnetic bridge is placed in
The both ends of the permanent magnet.
Preferably, on the rotor jacket, circumferentially it is uniformly distributed the buckle of several trapezoidals or dovetail type.
Preferably, on the rotor core, it is uniformly arranged along the circumference several protrusions or spill trapezoidal card slot mouth.
Preferably, each dovetail type buckle on the rotor jacket corresponds to two protrusions on the rotor core
Inverted trapezoidal card slot mouth, be interference fitted between the inverted trapezoidal card slot mouths and dovetail type buckle of two protrusions；
Each trapezoidal buckle on the rotor jacket, corresponds to the inverted trapezoidal of a spill on the rotor core
Card slot mouth is interference fitted between the inverted trapezoidal card slot mouth and a trapezoidal buckle of one spill.
Preferably, cooperating between the rotor jacket and the rotor core, there are the magnetism guiding access of protrusion, protrusions
Magnetism guiding access be attached with the rotor core, for improving the magnetic conduction efficiency between rotor and air gap, reduce motor
Quantity of heat production.
Preferably, the magnetism guiding access that the rotor jacket protrudes above is attached with the rotor core, in junction two
The air flue of side forms axial ventilation road；The rotor axial ventilating duct is used to improve the heat-sinking capability of rotor.
Preferably, the permanent magnet is V-structure, and the permanent magnet of several groups V-structure is uniformly distributed in described turn
In sub- iron core；
The magnetic bridge is located at the rear and front end of the permanent magnet of every group of V-structure.
Preferably, the material of the rotor jacket is magnetic conduction conductive material.
Preferably, tube-axial fan or centrifugal fan are set on the rotor shaft.
As can be seen from the technical scheme provided by the above-mentioned embodiment of the present invention, the embodiment of the invention provides a kind of permanent magnetism
Rotor sheath cooling structure device, the buckle in card slot mouth and rotor jacket on rotor core are interference fitted, and
Rotor axial ventilating duct is formed, has the flux path of protrusion to be attached with rotor core on rotor jacket, the sky of junction two sides
Gas access forms axial ventilation road, installs fan on the rotor shaft of motor, makees in tube-axial fan or centrifugal fan
Under, heat caused by eddy-current loss in rotor core and rotor jacket is taken away by axial ventilation road, is effectively reduced and turns
Temperature rise on sub- iron core, to improve the reliability of motor.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of rotor jacket section of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of rotor core section of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention
Figure；
Fig. 3 is a kind of rotor sectional view of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention；
Fig. 4 is that sheath is inverted trapezoidal in a kind of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention
The derivative figure of the rotor structure of structure；
Fig. 5 be in a kind of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention sheath contain it is multiple
The derivative figure of the rotor structure of ventilating duct；
Wherein, 1- rotor jacket, 2- permanent magnet, 3- rotor axial ventilating duct, 4- magnetic bridge, 5- rotor core, 6- rotor
Shaft.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
The embodiment of the invention provides a kind of permanent magnet machine rotor sheath cooling structure devices, pass through rotor jacket and rotor
Heat caused by eddy-current loss in rotor core and rotor jacket is taken away using fan in axial ventilation road between iron core, from
And the temperature rise of permanent magnet machine rotor is reduced, to improve the reliability of motor operation.
A kind of rotor jacket figure such as Fig. 1 institute of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention
Show, on rotor jacket, is circumferentially uniformly distributed several trapezoidal or dovetail type buckles.One kind provided in an embodiment of the present invention
The rotor core figure of permanent magnet machine rotor sheath cooling structure device is uniformly arranged along the circumference as shown in Fig. 2, on rotor core
Several double inverted trapezoidal rotor buckles.
The rotor figure of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention a kind of as shown in figure 3,
The device includes: rotor jacket 1, permanent magnet 2, rotor axial ventilating duct 3, magnetic bridge 4, rotor core 5, rotor shaft 6；Rotor
Shaft 6 is located at the center of device, and permanent magnet 2 is V-type magnet structure, and multiple groups V-type permanent magnet is uniformly distributed in rotor iron
In core 5, rotor jacket 1 is circumferentially uniformly distributed several trapezoidal or dovetail type buckles, and rotor core 5 is uniformly arranged along the circumference
Several inverted trapezoidal rotors buckle is used as card slot mouth, carries out interference between the buckle of rotor jacket 1 and the card slot mouth of rotor core 5
Cooperation, air duct portions between rotor jacket 1 and rotor core 5 constitute rotor axial ventilating duct 3, rotor jacket 1 with
For air gap portion between rotor core 5 there are the magnetism guiding access of protrusion, magnetic bridge 4 is placed in every group of permanent magnetism of V-type magnet structure 2
The rear and front end of body 2.
Axis is configured on a kind of rotor shaft 6 of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention
Flow fan or centrifugal fan.
The principle of cooling down processing is as follows to be realized to magneto using the rotor jacket of the present apparatus:
Using interference fit between rotor jacket and rotor core, fully ensure that rotor jacket and stablizing for rotor core are tied
It closes；And the material of rotor jacket is magnetic conduction conductive material.
After realizing interference fit between rotor jacket and rotor core, the connection between rotor jacket and rotor core
Part forms the magnetism guiding access of protrusion, and the magnetism guiding access of protrusion is used to improve the magnetic conduction efficiency between rotor core and air gap, mention
The working efficiency of high motor reduces the eddy-current loss of permanent magnet and sheath on permanent magnet machine rotor, reduces the heat production of magneto
Amount, to reduce rotor temperature rise.
Air gap portion between rotor jacket and rotor core constitutes the axial ventilation road of rotor, improves rotor
Heat-sinking capability.
When device is run, tube-axial fan or centrifugal fan on rotor shaft work, in aerofoil fan or
Under the action of person's centrifugal fan, the temperature that can be effectively reduced on rotor core, to improve the reliability of motor.
In Fig. 3, a kind of rotor jacket of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention
For the buckle of dovetail type, rotor core is the inverted trapezoidal card slot mouth of protrusion, the dovetail type buckle corresponding two of each rotor jacket
The inverted trapezoidal card slot mouth of a rotor core is interference fitted between two inverted trapezoidal card slot mouths and a dovetail type buckle.
In Fig. 4, a kind of rotor jacket of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention
For the buckle of inverted trapezoidal formula, rotor core is the inverted trapezoidal card slot mouth of spill, the inverted trapezoidal formula buckle pair of each rotor jacket
Answer the inverted trapezoidal card slot mouth an of rotor core, the inverted trapezoidal card slot mouth of the inverted trapezoidal formula buckle of a protrusion and a spill it
Between be interference fitted.
Sheath contains multiple ventilations in a kind of permanent magnet machine rotor sheath cooling structure device provided in an embodiment of the present invention
After the derivative figure of the rotor structure in road between rotor jacket and rotor core as shown in figure 5, be interference fitted, in rotor jacket and turn
Rotor axial ventilating duct is along the circumferential direction provided between sub- iron core.
Those skilled in the art will be understood that the shape of above-mentioned lifted buckle and card slot mouth is only that this hair is better described
The technical solution of bright embodiment, rather than the restriction to made by the embodiment of the present invention.Any shape for changing buckle with card slot mouth
The method for realizing interference fit, is all contained in the range of the embodiment of the present invention.
In conclusion the embodiment of the present invention is utilized by providing a kind of permanent magnet machine rotor sheath cooling structure device
Cooperation between rotor jacket and rotor core reduces the quantity of heat production of rotor；By rotor axial ventilating duct, by rotor iron
The heat that eddy-current loss generates in core and rotor jacket is taken away, to reduce rotor temperature rise, improves dissipating for rotor
Thermal energy power；Under the action of aerofoil fan or centrifugal fan, the temperature on rotor core is fast and effeciently reduced, to mention
The security reliability of high motor operation.
Those of ordinary skill in the art will appreciate that: attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit of separate part description may or may not be physically separated, component shown as a unit can be or
Person may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (7)
1. a kind of permanent magnet machine rotor sheath cooling structure device characterized by comprising rotor jacket, permanent magnet, armature spindle
To ventilating duct, magnetic bridge, rotor core, rotor shaft；The rotor shaft is located at the center of device, and the permanent magnet is equal
It is even to be distributed in the rotor core, buckle is set on the rotor jacket, card slot mouth is set on the rotor core, described turn
The buckle of sub- sheath is corresponding with the card slot mouth of the rotor core and is mutually interference fitted, the rotor jacket and the rotor iron
Air duct between core constitutes the rotor axial ventilating duct, and the magnetic bridge is placed in the both ends of the permanent magnet；
The material of the rotor jacket is magnetic conduction conductive material；
The permanent magnet is V-structure, and the permanent magnet of several groups V-structure is uniformly distributed in the rotor core；
The magnetic bridge is located at the inner and outer ends of the permanent magnet of every group of V-structure；
The rotor axial ventilating duct is located at the outside of the outer end of the two adjacent permanent magnets of two adjacent groups permanent magnet, and described
Rotor axial ventilating duct in the circumferential direction width be greater than the two adjacent groups permanent magnet two adjacent permanent magnets outer end
The distance between.
2. permanent magnet machine rotor sheath cooling structure device according to claim 1, which is characterized in that the rotor jacket
On, circumferentially it is uniformly distributed the buckle of several trapezoidals or dovetail type.
3. permanent magnet machine rotor sheath cooling structure device according to claim 1, which is characterized in that the rotor core
On, it is uniformly arranged along the circumference several protrusions or spill trapezoidal card slot mouth.
4. permanent magnet machine rotor sheath cooling structure device according to claim 2 or 3, which is characterized in that the rotor
Each dovetail type buckle on sheath corresponds to the inverted trapezoidal card slot mouths of two protrusions on the rotor core, two protrusions
Inverted trapezoidal card slot mouth and dovetail type buckle between be interference fitted；
Each trapezoidal buckle on the rotor jacket, corresponds to the inverted trapezoidal card slot of a spill on the rotor core
Mouthful, it is interference fitted between the inverted trapezoidal card slot mouth and a trapezoidal buckle of a spill.
5. permanent magnet machine rotor sheath cooling structure device according to claim 1, which is characterized in that the rotor jacket
It is cooperated between the rotor core there are the magnetism guiding access of protrusion, the magnetism guiding access of protrusion and the rotor core carry out
Connection, for improving the magnetic conduction efficiency between rotor and air gap, reduces the quantity of heat production of motor.
6. permanent magnet machine rotor sheath cooling structure device according to claim 1, which is characterized in that the rotor jacket
The magnetism guiding access protruded above is attached with the rotor core, and the air flue in junction two sides forms the rotor axial
Ventilating duct；The rotor axial ventilating duct is used to improve the heat-sinking capability of rotor.
7. permanent magnet machine rotor sheath cooling structure device according to claim 1, which is characterized in that the rotor shaft
Upper setting tube-axial fan or centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711203995.1A CN107749678B (en) | 2017-11-27 | 2017-11-27 | A kind of permanent magnet machine rotor sheath cooling structure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711203995.1A CN107749678B (en) | 2017-11-27 | 2017-11-27 | A kind of permanent magnet machine rotor sheath cooling structure device |
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| Publication Number | Publication Date |
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| CN107749678A CN107749678A (en) | 2018-03-02 |
| CN107749678B true CN107749678B (en) | 2019-12-03 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599415B (en) * | 2018-04-28 | 2020-02-18 | 东南大学 | High-speed permanent magnet motor rotor with combined magnetic conductive sheath |
| EP3667870B1 (en) | 2018-12-13 | 2023-07-26 | Hamilton Sundstrand Corporation | Cooling of electric motors |
| CN112701823B (en) * | 2020-12-02 | 2022-03-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor core, motor and air conditioning unit |
| CN112803634B (en) * | 2021-01-04 | 2021-10-15 | 擎能动力科技(苏州)有限公司 | Ultrahigh-speed motor, electric air compressor and new energy automobile |
| CN113922539A (en) * | 2021-10-08 | 2022-01-11 | 珠海格力电器股份有限公司 | Motor rotor and motor |
| CN114498977A (en) * | 2021-12-27 | 2022-05-13 | 华为数字能源技术有限公司 | Rotor core, rotor, motor driving system and electric vehicle |
| DE102022120774A1 (en) | 2022-08-17 | 2024-02-22 | Bayerische Motoren Werke Aktiengesellschaft | Rotor for an electric traction machine |
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| CN101764468B (en) * | 2010-03-04 | 2012-05-09 | 东元总合科技（杭州）有限公司 | Closed permanent magnet synchronous motor |
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| CN101316058A (en) * | 2008-06-04 | 2008-12-03 | 哈尔滨理工大学 | Rotor protection sleeve of high speed permanent magnet motor |
| CN103441634A (en) * | 2013-08-21 | 2013-12-11 | 北京交通大学 | Self-starting permanent magnet synchronous motor of magnetism and electricity conducting composite tooth structure |
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