CN107707051A - For motor permanent magnet and there is its rotor assembly, motor and compressor - Google Patents
For motor permanent magnet and there is its rotor assembly, motor and compressor Download PDFInfo
- Publication number
- CN107707051A CN107707051A CN201711188364.7A CN201711188364A CN107707051A CN 107707051 A CN107707051 A CN 107707051A CN 201711188364 A CN201711188364 A CN 201711188364A CN 107707051 A CN107707051 A CN 107707051A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- motor
- rotor assembly
- working face
- present
- 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
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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
- H02K1/27—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
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/04—Balancing means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses a kind of permanent magnet for motor and there is its rotor assembly, motor and compressor, the principal phase of the permanent magnet is neodymium iron boron, and the size of microcrystal of principal phase is less than or equal to 4 microns, quality accounting≤0.5% of dysprosium and/or terbium element in permanent magnet, permanent magnet at 25 DEG C in grasp coercivity H j satisfaction：Hcj≥1500kA/m.Permanent magnet according to embodiments of the present invention can have less or be lifted without heavy rare earth element and function admirable, cost performance.
Description
Technical field
The present invention relates to compressor field, more particularly to a kind of permanent magnet for motor and the rotor assembly with it,
Motor and compressor.
Background technology
In compressor field, high energy efficiency is a problem to study for a long period of time with application.Therefore, the permanent magnetism of frequency-changeable compressor drives
The high performance of the permanent magnet of dynamic motor is a problem to study for a long period of time.Meanwhile in order to realize high reliability, it is dilute added with weight
The rare-earth permanent magnet of earth elements is the first choice of the permanent magnet of the magneto as high-performance compressor for a long time.Heavy rare earth material
Material, on the one hand it is the strategic resource of country；On the other hand it is expensive so that the compressor cost performance for carrying the permanent magnet is low.
Meet that the reliability service under compressor high temperature without demagnetizing, typically requires the HCJ of rare-earth permanent magnet
Hcj >=1500kA/m is higher.To meet the requirement of foregoing HCJ, employed in correlation technique in permanent magnet
Add the heavy rare earth elements such as more than 3% even more than 5% dysprosium or/and terbium.
Over the past two years, heavy rare earth diffusion into the surface technique was studied with applying, and is reached same performance, is added in permanent magnet
The accounting of the heavy rare earth element added greatly reduces, and improves the cost performance of compressor to a certain extent.But use diffusion into the surface work
The permanent magnet of skill, the accounting of heavy rare earth element still reach 1%-3%, and the cost performance of permanent magnet is still relatively low.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art.Therefore, the present invention proposes one kind forever
Magnet, the permanent magnet can have less or be lifted without heavy rare earth element and function admirable, cost performance.
The invention also provides a kind of rotor assembly with above-mentioned permanent magnet.
The invention also provides a kind of motor with above-mentioned rotor assembly.
The invention also provides a kind of compressor with above-mentioned motor.
The permanent magnet for motor according to embodiments of the present invention, the principal phase of the permanent magnet are neodymium iron boron, and the master
The size of microcrystal of phase is less than or equal to 4 microns, quality accounting≤0.5% of dysprosium and/or terbium element in the permanent magnet, it is described forever
Magnet at 25 DEG C in grasp coercivity H j satisfaction：Hcj≥1500kA/m.
Permanent magnet according to embodiments of the present invention can have less or without heavy rare earth element and function admirable, cost performance
Lifting.
In addition, permanent magnet according to the above embodiment of the present invention can also have technical characteristic additional as follows：
In some embodiments of the invention, remanent magnetism Br of the permanent magnet at 25 DEG C meets：Br≥1.2T.
According to some embodiments of the present invention, maximum magnetic energy product (BH) max of the permanent magnet at 25 DEG C meets：(BH)
max≥300kJ/m3。
Alternatively, quality accounting≤0.5% of the gadolinium in the permanent magnet and/or holmium element.
According to some embodiments of the present invention, the area of the working face of the permanent magnet is less than or equal to the work of the permanent magnet
Make the maximum length in face and the product of Breadth Maximum.
Further, the working face of the permanent magnet is square.
Further, the working face has at least one in breach and hole.
Rotor assembly according to embodiments of the present invention, including permanent magnet according to embodiments of the present invention.
Alternatively, rotor assembly includes：Rotor core, have on the rotor core axially extending along its and along its circumference
The multiple magnet slots set are spaced apart, the permanent magnet is provided with each magnet slot；Two end plates, two end plates point
The axial both ends of the rotor core are not located at；At least one balance weight, two end plates it is at least one be provided with it is described
Balance weight.
Motor according to embodiments of the present invention, including rotor assembly according to embodiments of the present invention.
Compressor according to embodiments of the present invention, including motor according to embodiments of the present invention.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the structural representation of permanent magnet according to an embodiment of the invention；
Fig. 2 is the structural representation of the working face of permanent magnet according to an embodiment of the invention；
Fig. 3 is the structural representation of the working face of permanent magnet in accordance with another embodiment of the present invention；
Fig. 4 is the radial cross-section of rotor assembly according to embodiments of the present invention；
Fig. 5 is the axial sectional view of rotor assembly according to embodiments of the present invention；
Fig. 6 is the radial cross-section of motor according to embodiments of the present invention；
Fig. 7 is the structural representation of compressor according to embodiments of the present invention.
Reference：
Compressor 100；
Motor 110；Cylinder 120；Base bearing 130；Supplementary bearing 140；Piston 150；Bent axle 160；
Rotor assembly 111；Magnet slot 101；Stator module 112；Stator core 1121；Stator winding 1122；
Permanent magnet 10；Working face 11；Rotor core 20；End plate 30；Balance weight 40.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings.Below with reference to
The embodiment of accompanying drawing description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention, ability
The those of ordinary skill in domain can carry out a variety of changes in the case where not departing from the principle and objective of the present invention to these embodiments
Change, change, replacing and modification, the scope of the present invention are limited by claim and its equivalent.
In the description of the invention, it is to be understood that term " length ", " width ", " on ", " under ", " interior ", " outer ",
The orientation or position relationship of the instruction such as " axial direction ", " circumference ", " axial direction " are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description is of the invention with simplified, rather than the device or element of instruction or hint meaning must be with specifically sides
Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In the description of the invention, unless
It is otherwise noted, " multiple " are meant that two or more.
Fig. 1 is the dimensional structure diagram of permanent magnet 10 according to an embodiment of the invention.According to embodiments of the present invention
The principal phase of permanent magnet 10 be neodymium iron boron, and the size of microcrystal of principal phase is less than or equal to 4 microns, dysprosium and/or terbium in permanent magnet 10
Quality accounting≤0.5% of element.Here, the quality of quality accounting i.e. dysprosium and/or terbium element and total matter of permanent magnet 10
The ratio of amount, that is to say, that when in permanent magnet 10 containing one of them in dysprosium and terbium element, in dysprosium and terbium element wherein
The ratio of the quality of one and the gross mass of permanent magnet 10 is less than or equal to 0.5%, when simultaneously first containing dysprosium and terbium in permanent magnet 10
When plain, the ratio of the gross mass of dysprosium and terbium element and the gross mass of permanent magnet 10 is less than or equal to 0.5%.Wherein, above bar is met
The permanent magnet 10 of part at 25 DEG C in grasp coercivity H j satisfaction：Hcj >=1500kA/m, anti-demagnetization capability lifting so that motor
110 stable performance and reliable.
In the related art, the size for inside grasping coercivity H j is controlled by the content of heavy rare earth element (Dy, Tb etc.)
System, to meet the requirement of HCJ, it usually needs make the addition of the heavy rare earth elements such as Dy or Tb reach more than 3%, very
To more than 5%.The dosage of heavy rare earth element is larger, and cost is higher.Also have to enter using diffusion into the surface technique in some correlation techniques
Prepared by row, but the accounting of heavy rare earth element still reaches 1%-3%, reduction amount and unobvious, and the cost performance of permanent magnet 10 is still
It is relatively low.
And permanent magnet 10 according to embodiments of the present invention, no longer pass through the method or table of adding heavy rare earth element of routine
Face diffusion technique meets the requirement such as HCJ, but employs a kind of new mode, that is, passes through and control control principal phase
The size of composition and crystal grain adjusts the HCJ of permanent magnet 10, and the principal phase of permanent magnet 10 specially is arranged into neodymium iron
Boron, and the size of microcrystal of principal phase is less than or equal to 4 microns, for example, 1 micron, 2 microns or 3 microns etc..
Experiment proves that quality accounting≤0.5% of dysprosium and/or terbium element of such permanent magnet 10 in permanent magnet 10
In the case of, the magnetic property of permanent magnet 10 can also be in preferably horizontal, for example, permanent magnet 10 at 25 DEG C in grasp coercive
Power Hcj can meet：Hcj >=1500kA/m, anti-demagnetization capability is stronger, while can save expensive heavy rare earth element,
Diffusing procedure is eliminated simultaneously, so as to significantly reduce the cost of permanent magnet 10, improves cost performance.According to embodiments of the present invention
The cost of permanent magnet 10 reduce, function admirable and reliability it is high, cost performance lifting.
According to some embodiments of the present invention, remanent magnetism Br of the permanent magnet 10 at 25 DEG C can meet：Br≥1.2T.By
This, the magnetic flux density that permanent magnet 10 outwards exports is larger, and magnetic property is stronger, and the efficiency of motor 110 is higher and can keep relatively low
Cost.In some embodiments of the invention, maximum magnetic energy product (BH) max of permanent magnet 10 at 25 DEG C can meet：
(BH)max≥300kJ/m3, magnetic property is relatively low compared with strong and cost.
In some alternative embodiments of the present invention, gadolinium and/or holmium element can also be set in permanent magnet 10, gadolinium and/or
Holmium element is also beneficial to the lifting of magnetic property, wherein, quality accounting≤0.5% of gadolinium and/or holmium element in permanent magnet 10.By
This, not only allows motor 110 have excellent magnetic property, while may be controlled to this.
In the present invention, the shape for the working face 11 of permanent magnet 10 is not done specifically limited, can be according to actual conditions
The shape of the working face 11 of permanent magnet 10 is flexibly set, facilitating manufacture, installing and keeping excellent performance etc..For example, can be with
For the shape such as square or trapezoidal.Square can be that corner does not have complete shape jaggy, such as shown in 2, it is possible to have
Breach and/or hole etc..Here, breach can be arranged at square side, such as forms recess, can also be arranged at angle,
Such as corner cut is formed, hole can be arranged on square inside, such as set adjacent to the edge of working face 11 and along motor 110
It is axially extending.For example, as shown in figure 3, it is all provided with four angles of square working face 11 jagged.The permanent magnet 10 of these structures
Have the advantages that end magnetic flux utilization rate is high.
According to some embodiments of the present invention, the area of the working face 11 of permanent magnet 10 is less than or equal to the work of permanent magnet 10
The maximum length L and Breadth Maximum W in face 11 product.For example, as shown in Fig. 2 when the working face 11 of permanent magnet 10 is formed as not having
When jaggy square, the area of the working face 11 of permanent magnet 10 be equal to the maximum length L of the working face 11 of permanent magnet 10 with most
Big width W product；For another example as shown in figure 3, when permanent magnet 10 working face 11 for have it is jaggy square when, permanent magnet
The area of 10 working face 11 is then less than the maximum length L and Breadth Maximum W of the working face 11 of permanent magnet 10 product.Here,
The working face 11 of permanent magnet 10 is typically normal to the axial direction of motor 110.It is square to can be understood as square and rectangular general designation.
As shown in Figure 4 and Figure 5, permanent magnetism according to embodiments of the present invention is included according to the rotor assembly 111 of inventive embodiments
Body 10.Because permanent magnet 10 according to embodiments of the present invention has above-mentioned beneficial technique effect, therefore implemented according to the present invention
The electromagnetic performance of the rotor assembly 111 of example is relatively low compared with strong and cost.
In certain embodiments, rotor assembly 111 may include rotor core 20, two end plates 30, balance weights 40, rotor iron
Have on core 20 axially extending along its and along its circumferentially-spaced multiple magnet slot 101 for putting of opening up, that is to say, that rotor core 20
Upper to have magnet slot 101, magnet slot 101 includes putting multiple, each magnet slot 101 along circumferentially-spaced open up of rotor core 20
Along the axially extending of rotor core 20.Permanent magnet 10 is provided with each magnet slot 101, two end plates 30 are respectively provided at rotor core
20 axial both ends, to play a part of limiting the axial movement of permanent magnet 10.At least one be provided with of two end plates 30 is put down
Weigh block 40.That is, balance weight 40 there can be one, and can be arranged in any one of two end plates 30；Balance
Block 40 can also include two, and balance weight 40 can be set on each end plate 30, to lift dynamic balancing during rotor rotation.
The present invention do not done for the connected mode between rotor core 20, end plate 30 and balance weight 40 it is specifically limited, can be with
Including but not limited to rivet interlacement, bolt connection, welding, bonding etc..
As shown in fig. 6, motor 110 according to embodiments of the present invention includes rotor assembly 111 according to embodiments of the present invention.
Because rotor assembly 111 according to embodiments of the present invention has above-mentioned beneficial technique effect, therefore according to embodiments of the present invention
Rotor assembly 111 electromagnetic performance it is relatively low compared with strong and cost.It is understood that motor 110 also includes stator module 112,
Stator module 112 includes stator core 1121 and stator winding 1122, and these structures are to those skilled in the art can
Know, will not be described in detail herein.
As shown in fig. 7, compressor 100 according to embodiments of the present invention includes motor 110 according to embodiments of the present invention.By
There is above-mentioned beneficial technique effect, therefore compression according to embodiments of the present invention in motor 110 according to embodiments of the present invention
Machine 100 also has above-mentioned beneficial technique effect.It is understood that compressor 100 also include cylinder 120, base bearing 130,
The compression members such as supplementary bearing 140, piston 150 and bent axle 160, other compositions of compressor 100 according to embodiments of the present invention
And operation is knowable for the person of ordinary skill of the art, is not described in detail herein.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
In the description of this specification, the description of reference term " embodiment ", " specific example " or " example " etc. means to tie
Specific features, structure, material or the feature for closing the embodiment or example description are contained at least one embodiment of the invention
Or in example.In this manual, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term.And
And specific features, structure, material or the feature of description can not done in any one or more embodiments or example
Relate to, it is reconcilable in the case of can be combined with each other in an appropriate manner.
Claims (11)
1. a kind of permanent magnet for motor, it is characterised in that the principal phase of the permanent magnet is neodymium iron boron, and the crystalline substance of the principal phase
Less than or equal to 4 microns, quality accounting≤0.5% of dysprosium and/or terbium element in the permanent magnet, the permanent magnet exists grain particle diameter
Coercivity H j satisfactions are grasped at 25 DEG C：Hcj≥1500kA/m.
2. the permanent magnet according to claim 1 for motor, it is characterised in that remanent magnetism of the permanent magnet at 25 DEG C
Br meets：Br≥1.2T.
3. the permanent magnet according to claim 1 for motor, it is characterised in that maximum of the permanent magnet at 25 DEG C
Magnetic energy product (BH) max meets：(BH)max≥300kJ/m3。
4. the permanent magnet according to claim 1 for motor, it is characterised in that gadolinium and/or holmium in the permanent magnet
Quality accounting≤0.5% of element.
5. the permanent magnet according to claim 1 for motor, it is characterised in that the area of the working face of the permanent magnet
Less than or equal to the maximum length of the working face of the permanent magnet and the product of Breadth Maximum.
6. the permanent magnet according to claim 5 for motor, it is characterised in that the working face of the permanent magnet is side
Shape.
7. the permanent magnet according to claim 6 for motor, it is characterised in that the working face has breach and hole
In it is at least one.
8. a kind of rotor assembly, it is characterised in that including the permanent magnet any one of claim 1-7.
9. rotor assembly according to claim 8, it is characterised in that including：
Rotor core, have on the rotor core it is axially extending along its and along its it is circumferentially-spaced open up multiple magnet slots for putting,
The permanent magnet is provided with each magnet slot；
Two end plates, two end plates are respectively provided at the axial both ends of the rotor core；
At least one balance weight, two at least one of the end plate are provided with the balance weight.
10. a kind of motor, it is characterised in that including rotor assembly according to claim 8 or claim 9.
11. a kind of compressor, it is characterised in that including motor according to claim 10.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711188364.7A CN107707051A (en) | 2017-11-24 | 2017-11-24 | For motor permanent magnet and there is its rotor assembly, motor and compressor |
| PCT/CN2018/086760 WO2019100669A1 (en) | 2017-11-24 | 2018-05-14 | Permanent magnet for motor, rotor assembly having same, motor, and compressor |
| JP2020543665A JP2021501560A (en) | 2017-11-24 | 2018-05-14 | Permanent magnets for motors, rotor assemblies with them, motors and compressors |
| EP18881175.6A EP3713047A4 (en) | 2017-11-24 | 2018-05-14 | Permanent magnet for motor, rotor assembly having same, motor, and compressor |
| US15/930,685 US11600417B2 (en) | 2017-11-24 | 2020-05-13 | Permanent magnet for motor, rotor assembly having same, motor, and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711188364.7A CN107707051A (en) | 2017-11-24 | 2017-11-24 | For motor permanent magnet and there is its rotor assembly, motor and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107707051A true CN107707051A (en) | 2018-02-16 |
Family
ID=61180859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711188364.7A Pending CN107707051A (en) | 2017-11-24 | 2017-11-24 | For motor permanent magnet and there is its rotor assembly, motor and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107707051A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019100669A1 (en) * | 2017-11-24 | 2019-05-31 | 安徽美芝精密制造有限公司 | Permanent magnet for motor, rotor assembly having same, motor, and compressor |
| CN111555477A (en) * | 2020-05-26 | 2020-08-18 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN111555481A (en) * | 2020-05-26 | 2020-08-18 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN111555479A (en) * | 2020-05-26 | 2020-08-18 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN111819764A (en) * | 2018-03-12 | 2020-10-23 | 三菱电机株式会社 | Motor, compressor, blower, and refrigeration and air-conditioning apparatus |
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| JPH10130796A (en) * | 1996-09-06 | 1998-05-19 | Sumitomo Special Metals Co Ltd | Production of fine crystal permanent magnet alloy and isotropic permanent magnet powder |
| CN102362417A (en) * | 2009-03-31 | 2012-02-22 | 富士通将军股份有限公司 | Rotor for compressor motors |
| CN103276284A (en) * | 2013-06-05 | 2013-09-04 | 南京理工大学 | Preparation method for low dysprosium heat-resistant sintered neodymium-iron-boron |
| CN103858185A (en) * | 2011-10-13 | 2014-06-11 | Tdk株式会社 | R-T-B based sintered magnet and production method for same, and rotary machine |
| CN205647046U (en) * | 2016-04-14 | 2016-10-12 | 广东美芝制冷设备有限公司 | Permanent magnet of motor and motor, compressor that has it |
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2017
- 2017-11-24 CN CN201711188364.7A patent/CN107707051A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10130796A (en) * | 1996-09-06 | 1998-05-19 | Sumitomo Special Metals Co Ltd | Production of fine crystal permanent magnet alloy and isotropic permanent magnet powder |
| CN102362417A (en) * | 2009-03-31 | 2012-02-22 | 富士通将军股份有限公司 | Rotor for compressor motors |
| CN103858185A (en) * | 2011-10-13 | 2014-06-11 | Tdk株式会社 | R-T-B based sintered magnet and production method for same, and rotary machine |
| CN103276284A (en) * | 2013-06-05 | 2013-09-04 | 南京理工大学 | Preparation method for low dysprosium heat-resistant sintered neodymium-iron-boron |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019100669A1 (en) * | 2017-11-24 | 2019-05-31 | 安徽美芝精密制造有限公司 | Permanent magnet for motor, rotor assembly having same, motor, and compressor |
| US11600417B2 (en) | 2017-11-24 | 2023-03-07 | Anhui Meizhi Precision Manufacturing Co., Ltd. | Permanent magnet for motor, rotor assembly having same, motor, and compressor |
| CN111819764A (en) * | 2018-03-12 | 2020-10-23 | 三菱电机株式会社 | Motor, compressor, blower, and refrigeration and air-conditioning apparatus |
| CN111555477A (en) * | 2020-05-26 | 2020-08-18 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN111555481A (en) * | 2020-05-26 | 2020-08-18 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN111555479A (en) * | 2020-05-26 | 2020-08-18 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN111555479B (en) * | 2020-05-26 | 2021-08-31 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN111555477B (en) * | 2020-05-26 | 2021-09-28 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
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Application publication date: 20180216 |