CN109245361A - Rotor, motor and air conditioner - Google Patents
Rotor, motor and air conditioner Download PDFInfo
- Publication number
- CN109245361A CN109245361A CN201811168365.XA CN201811168365A CN109245361A CN 109245361 A CN109245361 A CN 109245361A CN 201811168365 A CN201811168365 A CN 201811168365A CN 109245361 A CN109245361 A CN 109245361A
- Authority
- CN
- China
- Prior art keywords
- copper shield
- rotor
- permanent magnet
- rotor according
- shield
- 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
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
- H02K1/27—Rotor cores with permanent magnets
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/42—Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The present invention provides a kind of rotor, motor and air conditioner.The rotor includes permanent magnet (1), copper shield (2) and protective layer (3); copper shield (2) is set in permanent magnet (1) outside; protective layer (3) is set in copper shield (2) outside, and copper shield (2) uses segmentation structure.Rotor according to the present invention can reduce the loss of shielded layer itself while realizing the transfer of permanent magnetism body heat content.
Description
Technical field
The invention belongs to technical field of motors, and in particular to a kind of rotor, motor and air conditioner.
Background technique
It is a variety of that high-speed permanent magnetic synchronous motor has the advantages that power density is big, dynamic response is good and structure is simple etc., has become
For one of the research hotspot in International Power field.But the permanent magnet in rotor generally uses sintered Nd-Fe-B permanent magnetic material,
Due to this permanent-magnet material resistance to compression not tension.There is enough intensity to guarantee permanent magnet at high speeds, generally outside permanent magnet
One layer of highly stressed rotor sheath is wrapped up, rotor jacket and permanent magnet use interference fit to guarantee that permanent magnet is still held at work
By certain compression, to guarantee the safe operation of high-speed motor.
Currently, another then be carbon fiber one is using non-magnetic high duty metal sheath there are two types of common sheaths
Tie up the sheath of binding type.Carbon fibre reinforced composite conductivity is lower, solves using eddy-current loss existing for protective metal shell
Problem, but it can not shield the harmonic field into permanent magnet, therefore a large amount of eddy-current loss can be still generated in permanent magnet.Together
When, carbon fiber is the non-conductor of heat, causes the heat dissipation effect of PM rotor poor, and carbon fiber sheath complex process, cost
Higher, therefore, in industrial application, what is be widely used is non-magnetic conductive metal sheath.However, protective metal shell is conductive material,
Eddy-current loss can be generated under high-frequency electromagnetic field action, sheath is caused to generate heat, and since sheath and rotor permanent magnet are in close contact, shield
Heat in set is easy to transmit to permanent magnet.In addition, general alloy sleeve material electric conductivity is not high, to the screen of harmonic field
The effect of covering is limited, leads to eddy-current loss in permanent magnet or larger.It is excessively high to will lead to permanent magnet temperature rise for factors above when serious
Irreversible demagnetization is generated, so that motor performance decline be made even to damage.Therefore, no matter using which kind of protection sets of plan, all urgently
A kind of method or structure are needed to reduce the temperature rise of rotor permanent magnet.
Currently, reducing high speed rotor loss using the copper shield of high conductivity, it has also become the most popular shielding measure.
But current patent does not refer to the eddy-current loss measure for how reducing copper shield itself.
Existing high speed permanent magnet motor rotor structure, rotor are surface-mounted rotor structure, the most apparent feature of the structure
It is that one layer of very thin copper shield is increased between protective layer and permanent magnetism external surface, the advantage of doing so is that can should be
The eddy-current loss that permanent magnet surfaces generate largely is transferred to metal screen layer sheet, can be from largely reducing permanent magnet
There is a biggish defect in the excessively high problem of local temperature, these patent structures, i.e. the heat of copper shield is excessively high still
Meeting heat is transmitted on magnet steel, and therefore, it is necessary to new structures while realizing the transfer of magnet steel heat, moreover it is possible to reduce shielded layer itself
Loss.
Summary of the invention
It therefore, can be in reality the technical problem to be solved in the present invention is that providing a kind of rotor, motor and air conditioner
While existing permanent magnetism body heat content transfer, the loss of shielded layer itself is reduced.
To solve the above-mentioned problems, the present invention provides a kind of rotor, including permanent magnet, copper shield and protective layer,
Copper shield is set in outside permanent magnet, and protective layer is set in outside copper shield, and copper shield uses segmentation structure.
Preferably, copper shield uses axial segmentation formula structure, and multistage copper shield is arranged along the axially spaced-apart of permanent magnet,
Filled layer is provided between adjacent copper shield.
Preferably, copper shield uses circumferentially segmented formula structure, and multistage copper shield is provided at circumferentially spaced along permanent magnet,
Filled layer is provided between adjacent copper shield.
Preferably, copper shield uses circumferentially segmented formula structure, and multistage copper shield is provided at circumferentially spaced along permanent magnet,
Filled layer is provided between adjacent copper shield.
Preferably, the segments of copper shield is n, wherein n > 2.
It preferably, is clearance fit, transition fit or interference fit between copper shield and permanent magnet.
Preferably, the radial thickness of copper shield is h, wherein 0.03mm ﹤ h ﹤ 1.5mm.
Preferably, the gap between the section and section of copper shield is δ, wherein 0 ﹤ δ ﹤ 1mm.
Preferably, filled layer is epoxy resin.
Preferably, protective layer is made of alloy material or nonmetallic composite.
Preferably, rotor further includes shaft, and permanent magnet is set in outside shaft, and is fixed with shaft gluing.
According to another aspect of the present invention, a kind of motor, including rotor are provided, which is above-mentioned electricity
Machine rotor.
In accordance with a further aspect of the present invention, a kind of air conditioner, including rotor are provided, which is above-mentioned
Rotor.
Rotor provided by the invention, including permanent magnet, copper shield and protective layer, copper shield are set in permanent magnet
Outside, protective layer is set in outside copper shield, and copper shield uses segmentation structure.Since copper shield uses segmented knot
Structure, therefore the electromagnetism harmonic wave into permanent magnet is not only significantly shielded, the eddy-current loss of permanent magnet surfaces is reduced, it can
While realizing the transfer of permanent magnetism body heat content, the loss of shielded layer itself is also reduced.
Detailed description of the invention
Fig. 1 is the vertical schematic cross-sectional view of the rotor of first embodiment of the invention；
Fig. 2 is the cross-sectional structure schematic diagram of the rotor of second embodiment of the invention.
Appended drawing reference indicates are as follows:
1, permanent magnet；2, copper shield；3, protective layer；4, filled layer；5, shaft.
Specific embodiment
In conjunction with referring to figure 1 and figure 2, according to an embodiment of the invention, rotor includes permanent magnet 1, copper shield 2
With protective layer 3, copper shield 2 is set in outside permanent magnet 1, and protective layer 3 is set in outside copper shield 2, and copper shield 2 is using segmentation
Formula structure.
Since copper shield uses segmentation structure, the electromagnetism into permanent magnet is not only significantly shielded
Harmonic wave reduces the eddy-current loss of permanent magnet surfaces, can also reduce shielded layer certainly while realizing the transfer of permanent magnetism body heat content
The loss of body.
In one embodiment of the invention, copper shield 2 uses axial segmentation formula structure, 2 edge of multistage copper shield
The axially spaced-apart of permanent magnet 1 is arranged, and is provided with filled layer 4 between adjacent copper shield 2.Filled layer uses insulating materials system
At, therefore can reduce the gap between the copper shield 2 of adjacent segment and the contact stress of protective layer 3, while playing partition not
With the effect in the vortex circuit between shielded layer, the eddy-current loss of permanent magnet surfaces is reduced, while also reducing shielded layer itself
Loss.
Preferably, filled layer 4 is epoxy resin, can reduce the contact stress herein with protective layer 3, while playing partition
The effect in the vortex circuit between different copper shields.
In a second embodiment of the present invention, copper shield 2 uses circumferentially segmented formula structure, 2 edge of multistage copper shield
Permanent magnet 1 is provided at circumferentially spaced, and is provided with filled layer 4 between adjacent copper shield 2.
Circumferentially segmented formula structure is still either used using axial segmentation formula structure, can reduce permanent magnet 1 and
There is remarkable result in terms of the eddy-current loss of copper shield 2 itself.It can also be combined simultaneously using circumferentially segmented and axial segmentation
Copper shield structure uses so that circumferentially segmented and axial segmentation is comprehensive, to play the vortex separated between different shielded layers
The effect in circuit reduces the effect of the eddy-current loss of permanent magnet surfaces.
Preferably, the segments of copper shield 2 is n, wherein n > 2 so that copper shield 2 can have it is enough
Segments plays the role of the vortex circuit between the different shielded layers of significantly more efficient partition.
The radial thickness of copper shield 2 is h, wherein 0.03mm ﹤ h ﹤ 1.5mm.Shielding thickness in a certain range, with
The increase of thickness, decreasing loss effect is more obvious, but thickness is too small (when such as less than 0.03mm), causes the vortex electricity in shielded layer
Close to sharply increase, when thickness is excessive, (when such as larger than 1.5mm), improvement is not further added by, and occupies high-intensitive protective case instead
Space, therefore excessive eddy-current loss is induced in shielded layer in order to prevent, influencing it reduces the effect of rotor eddy current loss,
It is unlikely to influence protective case thickness again, shielding thickness should ensure that certain suitable dimension.Various sizes of shaft, shielded layer have
One preferably Thickness.
Gap between the section and section of copper shield 2 is δ, wherein 0 ﹤ δ ﹤ 1mm.Work when gap delta is mainly processing and fabricating
Epoxide-resin glue is filled in gap primarily to the stress concentration for reducing the protective cases such as carbon fiber in the gap location is asked in skill gap
Topic.
It can be gap-matched between copper shield 2 and permanent magnet 1, transition fit or interference fit, so that copper shield
Good matching relationship is formed between layer 2 and permanent magnet 1.
Protective layer 3 is made of alloy material or nonmetallic composite.3 interference of protective layer acts on copper shield 2
Surface applies a pressing force to permanent magnet 1, plays protection to permanent magnet 1, because being centrifuged masterpiece when preventing its high speed rotation
With and destroy.The nonmetallic composite is, for example, carbon fiber.
Rotor further includes shaft 5, and permanent magnet 1 is set in outside shaft 5, and is fixed with 5 gluing of shaft.
In the present embodiment, permanent magnet is magnet steel, and using neodymium iron boron or samarium-cobalt material, magnet steel is ring structure, interior table
Face is by dedicated magnet steel glue bond in shaft 5.
When carrying out the assembly of rotor, first annular magnetic steel is connected on machine shaft 5 by magnetic steel special gluing, really
Recognizing it will not get loose；The copper shield of radial segments 2 is successively assembled to magnet steel surface later, applies shroud at overlap span
Oxygen resin is to fill gap；Finally, installing protective layer 3 outside copper shield 2 by interference mode.
According to an embodiment of the invention, motor includes rotor, which is above-mentioned rotor.
According to an embodiment of the invention, air conditioner includes rotor, which is above-mentioned rotor.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Protect range.
Claims (13)
1. a kind of rotor, which is characterized in that including permanent magnet (1), copper shield (2) and protective layer (3), the copper shield
Layer (2) is set in the permanent magnet (1) outside, and the protective layer (3) is set in the copper shield (2) outside, the copper shield
(2) segmentation structure is used.
2. rotor according to claim 1, which is characterized in that the copper shield (2) uses axial segmentation formula knot
Structure, copper shield (2) described in multistage is arranged along the axially spaced-apart of the permanent magnet (1), between the adjacent copper shield (2)
It is provided with filled layer (4).
3. rotor according to claim 1, which is characterized in that the copper shield (2) uses circumferentially segmented formula knot
Structure, copper shield (2) being provided at circumferentially spaced along the permanent magnet (1) described in multistage, between the adjacent copper shield (2)
It is provided with filled layer (4).
4. rotor according to claim 2, which is characterized in that the copper shield (2) uses circumferentially segmented formula knot
Structure, copper shield (2) being provided at circumferentially spaced along the permanent magnet (1) described in multistage, between the adjacent copper shield (2)
It is provided with filled layer (4).
5. rotor according to any one of claim 2 to 4, which is characterized in that the segmentation of the copper shield (2)
Number is n, wherein n > 2.
6. rotor according to claim 1, which is characterized in that the copper shield (2) and the permanent magnet (1) it
Between be clearance fit, transition fit or interference fit.
7. rotor according to claim 1, which is characterized in that the radial thickness of the copper shield (2) is h,
Middle 0.03mm ﹤ h ﹤ 1.5mm.
8. rotor according to claim 1, which is characterized in that between the section and section of the copper shield (2)
Gap is δ, wherein 0 ﹤ δ ﹤ 1mm.
9. rotor according to any one of claim 2 to 4, which is characterized in that the filled layer (4) is asphalt mixtures modified by epoxy resin
Rouge.
10. rotor according to claim 1, which is characterized in that the protective layer (3) uses alloy material or non-gold
Belong to composite material to be made.
11. rotor according to any one of claim 1 to 4, which is characterized in that the rotor further includes turning
Axis (5), the permanent magnet (1) are set in the shaft (5) outside, and fix with the shaft (5) gluing.
12. a kind of motor, including rotor, which is characterized in that the rotor is any one of claims 1 to 11 institute
The rotor stated.
13. a kind of air conditioner, including rotor, which is characterized in that the rotor is any one of claims 1 to 11
The rotor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811168365.XA CN109245361A (en) | 2018-10-08 | 2018-10-08 | Rotor, motor and air conditioner |
| PCT/CN2019/070663 WO2020073549A1 (en) | 2018-10-08 | 2019-01-07 | Motor rotor, motor, and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811168365.XA CN109245361A (en) | 2018-10-08 | 2018-10-08 | Rotor, motor and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109245361A true CN109245361A (en) | 2019-01-18 |
Family
ID=65055157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811168365.XA Pending CN109245361A (en) | 2018-10-08 | 2018-10-08 | Rotor, motor and air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109245361A (en) |
| WO (1) | WO2020073549A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994844A (en) * | 2019-12-30 | 2020-04-10 | 沈阳工业大学 | High-speed permanent magnet motor rotor with shielding layer |
| CN111555489A (en) * | 2019-02-08 | 2020-08-18 | 株式会社日立产业机器 | Rotating electrical machine and elevator hoist system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11837935B2 (en) | 2021-02-02 | 2023-12-05 | Black & Decker, Inc. | Canned brushless motor |
Citations (9)
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|---|---|---|---|---|
| JPH1169676A (en) * | 1997-08-06 | 1999-03-09 | Meidensha Corp | Rotor structure of permanent-magnet type dynamo-electric machine |
| EP1976096A2 (en) * | 2007-03-27 | 2008-10-01 | Hamilton Sundstrand Corporation | Segmented permanent magnet rotor for high speed synchronous machines |
| JP2014064428A (en) * | 2012-09-24 | 2014-04-10 | Daikin Ind Ltd | Rotor and rotary electric machine |
| CN204992842U (en) * | 2015-10-15 | 2016-01-20 | 江苏利得尔电机有限公司 | Permanent -magnet machine rotor sheath |
| CN105305685A (en) * | 2015-11-24 | 2016-02-03 | 南京埃斯顿自动控制技术有限公司 | Permanent magnet synchronous direct-drive motor |
| WO2017073036A1 (en) * | 2015-10-28 | 2017-05-04 | 川崎重工業株式会社 | Rotor for rotary electric machine |
| CN107425632A (en) * | 2017-09-14 | 2017-12-01 | 新誉轨道交通科技有限公司 | High speed permanent magnet motor rotor and high-speed permanent magnet motor |
| CN206775256U (en) * | 2016-06-17 | 2017-12-19 | 发那科株式会社 | Rotor component, rotor and motor |
| CN208806668U (en) * | 2018-10-08 | 2019-04-30 | 珠海格力电器股份有限公司 | Rotor, motor and air conditioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204271777U (en) * | 2014-12-05 | 2015-04-15 | 沈阳工业大学 | With the p-m rotor of spiral stainless steel band |
| US9985502B2 (en) * | 2015-06-04 | 2018-05-29 | Calnetix Technologies, Llc | Reducing high frequency losses in an electric machine |
| CN104917318A (en) * | 2015-06-16 | 2015-09-16 | 哈尔滨工业大学 | Sheath of high-speed permanent magnet motor rotor |
| CN105896775A (en) * | 2016-06-28 | 2016-08-24 | 无锡新大力电机有限公司 | Permanent magnet motor jacket |
-
2018
- 2018-10-08 CN CN201811168365.XA patent/CN109245361A/en active Pending
-
2019
- 2019-01-07 WO PCT/CN2019/070663 patent/WO2020073549A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1169676A (en) * | 1997-08-06 | 1999-03-09 | Meidensha Corp | Rotor structure of permanent-magnet type dynamo-electric machine |
| EP1976096A2 (en) * | 2007-03-27 | 2008-10-01 | Hamilton Sundstrand Corporation | Segmented permanent magnet rotor for high speed synchronous machines |
| JP2014064428A (en) * | 2012-09-24 | 2014-04-10 | Daikin Ind Ltd | Rotor and rotary electric machine |
| CN204992842U (en) * | 2015-10-15 | 2016-01-20 | 江苏利得尔电机有限公司 | Permanent -magnet machine rotor sheath |
| WO2017073036A1 (en) * | 2015-10-28 | 2017-05-04 | 川崎重工業株式会社 | Rotor for rotary electric machine |
| CN105305685A (en) * | 2015-11-24 | 2016-02-03 | 南京埃斯顿自动控制技术有限公司 | Permanent magnet synchronous direct-drive motor |
| CN206775256U (en) * | 2016-06-17 | 2017-12-19 | 发那科株式会社 | Rotor component, rotor and motor |
| CN107425632A (en) * | 2017-09-14 | 2017-12-01 | 新誉轨道交通科技有限公司 | High speed permanent magnet motor rotor and high-speed permanent magnet motor |
| CN208806668U (en) * | 2018-10-08 | 2019-04-30 | 珠海格力电器股份有限公司 | Rotor, motor and air conditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555489A (en) * | 2019-02-08 | 2020-08-18 | 株式会社日立产业机器 | Rotating electrical machine and elevator hoist system |
| CN110994844A (en) * | 2019-12-30 | 2020-04-10 | 沈阳工业大学 | High-speed permanent magnet motor rotor with shielding layer |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020073549A1 (en) | 2020-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190118 |
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| RJ01 | Rejection of invention patent application after publication |