CN108599415A - A kind of high speed permanent magnet motor rotor containing combined type magnetic conduction sheath - Google Patents
A kind of high speed permanent magnet motor rotor containing combined type magnetic conduction sheath Download PDFInfo
- Publication number
- CN108599415A CN108599415A CN201810400499.3A CN201810400499A CN108599415A CN 108599415 A CN108599415 A CN 108599415A CN 201810400499 A CN201810400499 A CN 201810400499A CN 108599415 A CN108599415 A CN 108599415A
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- China
- Prior art keywords
- magnetizer
- magnetic conduction
- permanent magnet
- combined type
- type magnetic
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Classifications
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- 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
Abstract
The invention discloses a kind of high speed permanent magnet motor rotors containing combined type magnetic conduction sheath, including shaft, rotor core and the combined type magnetic conduction sheath set gradually from inside to outside, permanent magnet is equipped between the rotor core and combined type magnetic conduction sheath, the combined type magnetic conduction sheath includes magnetizer and non-magnetizer, the magnetizer and non-magnetizer are along the circumferentially staggered setting of combined type magnetic conduction sheath, it is fixedly connected and is formed between the magnetizer and non-magnetizer and is electrically insulated, the quantity of the magnetizer and the quantity of non-magnetizer are identical as motor pole number.Structure disclosed by the invention can reduce eddy-current loss in sheath, inhibit rotor temperature rise, while reducing permanent magnet dosage, improve motor torque fan-out capability.
Description
Technical field
The present invention relates to a kind of rotors, more particularly to a kind of high-speed permanent magnet motor containing combined type magnetic conduction sheath
Rotor belongs to technical field of motors.
Background technology
Under the premise of electromagnetic load is certain, it is the major measure for improving power density to improve magneto rotating speed.To support
The centrifugation force effect to disappear under high rotating speed suffered by permanent magnet, traditional internal rotor surface-mounted permanent magnet machine mostly use non-magnetic sheath
Permanent magnet is constrained, common non-magnet material includes fibrous composite and high intensity non-magnetic alloy etc..Non-magnetic sheath
In the presence of effective air gap length and magnetic circuit reluctance between rotor is increased, air gap flux density amplitude and motor inductances value are reduced, is caused
Permanent magnet dosage is significantly increased.Since heat conductivity is very low, it is unfavorable for high speed rotor of motor heat dissipation, high-speed permanent magnet motor
Middle alloy sleeve use is more extensive.
In addition the surface-mounted rotor structure of the prior art is as shown in Figure 1, using monoblock type alloy sleeve 100, by one kind
Material overall processing or multiple material weld to obtain, and monoblock type alloy sleeve 100 is not segmented along the circumferential direction, alloy sleeve 100
Interference fit is used between permanent magnet 101 to avoid being moved in 101 operational process of permanent magnet.It is more due to containing in air-gap field
The time harmonic that generates of slot ripples, space harmonics caused by armature mmf and input current non-sine, in alloy sleeve 100
Eddy-current loss is larger, limits the feasibility for further increasing high-speed electric expreess locomotive rotating speed and reducing gas length.
The prior art is mainly solved the above problems using following methods：Using the sheath material of higher intensity；In alloy protective
It puts on and increases new shielded layer；Optimized alloy physical characteristics of materials；Using the less slot number cooperation of harmonic content；Increase inverter
Switching frequency and rotor oil cooling etc..But these treatment process are complicated, reliability is bad, cost is higher, and may lead to high speed forever
The other problems such as magneto power density decline.
Invention content
In view of the above-mentioned defects in the prior art, the present invention provides a kind of, and the high-speed permanent magnetic containing combined type magnetic conduction sheath is electric
Machine rotor solves the problems such as existing high speed permanent magnet motor rotor structure heat dissipation is bad, and eddy-current loss is big.
Technical solution of the present invention is as follows：A kind of high speed permanent magnet motor rotor containing combined type magnetic conduction sheath, including by interior
Shaft, rotor core and the combined type magnetic conduction sheath set gradually outward, between the rotor core and combined type magnetic conduction sheath
Equipped with permanent magnet, the combined type magnetic conduction sheath includes magnetizer and non-magnetizer, and the magnetizer and non-magnetizer are along combination
The circumferentially staggered setting of formula magnetic conduction sheath, is fixedly connected and is formed between the magnetizer and non-magnetizer and be electrically insulated, the magnetic conduction
The quantity of body and the quantity of non-magnetizer are identical as motor pole number.
Further, the outer rim of the magnetizer and the outer rim of non-magnetizer be with outside the high speed permanent magnet motor rotor
Edge decentraction and radius are less than the circular arc of high speed permanent magnet motor rotor outer rim.
Further, the outer rim of the magnetizer and the outer rim of non-magnetizer be with outside the high speed permanent magnet motor rotor
Edge with one heart and radius be equal to high speed permanent magnet motor rotor outer rim circular arc.
Further, axial direction of the magnetizer by several magnetic conduction sheets along the shaft is overrided to form, the magnetic conduction sheet it
Between formed electrical isolation.
Preferably, the first electric insulation layer is equipped between the magnetic conduction sheet.
Further, it is clamped using keyway between the magnetizer and non-magnetizer, the magnetizer and non-magnetizer
Joint surface is equipped with the second electric insulation layer.
Further, the shaft and rotor core are made into integration by permeability magnetic material.
The advantages of technical solution provided by the present invention, is：
1, combined type magnetic conduction sheath is staggered and is formed with non-magnetizer for magnetizer in circumferential direction and is electrically insulated, and has cut off group
It is vortexed circulation path in box-like magnetic conduction sheath, reduces the eddy-current loss in sheath, inhibits rotor temperature rise.
2, the outer rim of magnetizer, the outer rim of non-magnetizer and rotor decentraction and radius are less than rotor radius, and realization differs
Air gap, unloaded air gap magnetic density waveform sine degree higher.
3, the magnetizer of lamination further reduces the eddy-current loss in sheath.
4, the magnetic conduction body portion of combined type magnetic conduction sheath reduces effective air gap length, in same air gap flux density amplitude premise
Under, reduce permanent magnet dosage.
5, magnetic circuit reluctance reduces, and motor inductances value and convex grey subset increase, to high-speed permanent magnet motor control lateral inhibition output electricity
It is beneficial to flow harmonic wave.Quadrature axis inductance is differed with d-axis inductance, reluctance torque can be utilized to improve motor torque fan-out capability.
Description of the drawings
Fig. 1 is prior art surface-mounted rotor structural schematic diagram.
Fig. 2 is the cross section structure schematic diagram of the high speed permanent magnet motor rotor of the invention containing combined type magnetic conduction sheath.
Fig. 3 is a quarter structural upright signal of the high speed permanent magnet motor rotor of the invention containing combined type magnetic conduction sheath
Figure.
Specific implementation mode
With reference to embodiment, the invention will be further described, it should be understood that these embodiments be merely to illustrate the present invention and
It is not used in and limits the scope of the invention, after having read the present invention, those skilled in the art wait similar shapes to the various of the present invention
The modification of formula is fallen in the application range as defined in the appended claims.
Shown in Fig. 2 and Fig. 3, the high-speed permanent magnet motor containing combined type magnetic conduction sheath involved by the present embodiment turns
Son is quadrupole rotor, which is followed successively by shaft 1, rotor core 2 and combined type magnetic conduction sheath, wherein shaft from inside to outside
1 and rotor core 2 be made of 45# magnetic conduction steel, 2 center of rotor core be provided with press fitting shaft 1 through-hole.Rotor core 2
With shaft 1 using being interference fitted, shaft 1 is connect with external loading.Combined type magnetic conduction sheath includes magnetizer 3 and non-magnetizer 4,
Magnetizer 3 and non-magnetizer 4 are designed with four pieces, and along the circumferentially staggered decile setting of combined type magnetic conduction sheath.Non-magnetizer 4 uses
GH4169 high strength alloy steels are made, and are fixedly connected with rotor core 2 by the first keyway 5.It is set between two non-magnetizers 4
Magnetizer 3 is set, magnetizer 3 is axially overrided to form by the permalloy thin plate 3a of 60 1mm thickness, is applied between permalloy thin plate 3a
There is insulated paint to form the first insulating layer, the circulation path being vortexed in an axial direction is cut off.Magnetizer 3 passes through second with non-magnetizer 4
Keyway 6 connects, and second is formed by hot-spraying technique and epoxy resin glue sticking on the joint surface of magnetizer 3 and non-magnetizer 4
Electric insulation layer has cut off the vortex circulation path in sheath to achieve the effect that electrical isolation, reduces eddy-current loss.
Magnetizer 3 and the outer rim of non-magnetizer 4 are circular arc in the present embodiment, and circular arc is not concentric with the outer rim of rotor.
Arc radius is 26.5mm, is less than rotor periphery radius, to optimize empty load of motor air gap flux density.Magnetizer 3 and rotor core 2 it
Between be provided with Nd-Fe-B permanent magnet 7, permanent magnet 7 is magnetized using the direction for being parallel to its symmetry axis, to increase motor gas-gap flux density
Fundamental voltage amplitude.It can be used interference fit between permanent magnet 7 and magnetizer 3, ensure in operational process that permanent magnet 7 bears pressure and answers always
Power.
It should be noted that in above-described embodiment, the outer rim with rotor can also be used in magnetizer 3 and the outer rim of non-magnetizer 4
The concentric and identical circular shape of radius has no effect on the effect for reducing eddy-current loss.Shaft 1 and rotor core 2 can also be adopted
It is made into integration with permeability magnetic material, and cooperation is reconnected without manufacture respectively.
Claims (7)
1. a kind of high speed permanent magnet motor rotor containing combined type magnetic conduction sheath, including set gradually from inside to outside shaft, turn
Sub- iron core and combined type magnetic conduction sheath are equipped with permanent magnet between the rotor core and combined type magnetic conduction sheath, which is characterized in that
The combined type magnetic conduction sheath includes magnetizer and non-magnetizer, and the magnetizer and non-magnetizer are along combined type magnetic conduction sheath week
To being staggered, be fixedly connected and formed between the magnetizer and non-magnetizer and be electrically insulated, the quantity of the magnetizer and
The quantity of non-magnetizer is identical as motor pole number.
2. the high speed permanent magnet motor rotor according to claim 1 containing combined type magnetic conduction sheath, which is characterized in that described
The outer rim of magnetizer and the outer rim of non-magnetizer are with the high speed permanent magnet motor rotor outer rim decentraction and radius is less than height
The circular arc of fast permanent magnet machine rotor outer rim.
3. the high speed permanent magnet motor rotor according to claim 1 containing combined type magnetic conduction sheath, which is characterized in that described
The outer rim of magnetizer and the outer rim of non-magnetizer are that and radius concentric with the high speed permanent magnet motor rotor outer rim is equal to high speed
The circular arc of permanent magnet machine rotor outer rim.
4. the high speed permanent magnet motor rotor according to claim 1 containing combined type magnetic conduction sheath, which is characterized in that described
Axial direction of the magnetizer by several magnetic conduction sheets along the shaft is overrided to form, and electrical isolation is formed between the magnetic conduction sheet.
5. the high speed permanent magnet motor rotor according to claim 4 containing combined type magnetic conduction sheath, which is characterized in that described
The first electric insulation layer is equipped between magnetic conduction sheet.
6. the high speed permanent magnet motor rotor according to claim 1 containing combined type magnetic conduction sheath, which is characterized in that described
It is clamped using keyway between magnetizer and non-magnetizer, the joint surface of the magnetizer and non-magnetizer is equipped with the second electrical isolation
Layer.
7. the high speed permanent magnet motor rotor according to claim 1 containing combined type magnetic conduction sheath, which is characterized in that described
Shaft and rotor core are made into integration by permeability magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810400499.3A CN108599415B (en) | 2018-04-28 | 2018-04-28 | High-speed permanent magnet motor rotor with combined magnetic conductive sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810400499.3A CN108599415B (en) | 2018-04-28 | 2018-04-28 | High-speed permanent magnet motor rotor with combined magnetic conductive sheath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108599415A true CN108599415A (en) | 2018-09-28 |
| CN108599415B CN108599415B (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810400499.3A Active CN108599415B (en) | 2018-04-28 | 2018-04-28 | High-speed permanent magnet motor rotor with combined magnetic conductive sheath |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020189306A1 (en) * | 2001-06-15 | 2002-12-19 | Lincoln Tsai | Magnetic lock mechanism |
| CN201119249Y (en) * | 2007-11-27 | 2008-09-17 | 沈阳工业大学 | A shielding cover |
| US20100019603A1 (en) * | 2008-07-28 | 2010-01-28 | Direct Drive Systems, Inc. | Rotor for an electric machine |
| CN101924445A (en) * | 2010-09-01 | 2010-12-22 | 哈尔滨工业大学 | Permanent magnetic synchronous motor in wide weak-magnetic speed-regulating range |
| CN102439824A (en) * | 2009-05-22 | 2012-05-02 | 阿塞里克股份有限公司 | An electric motor having a permanent magnet rotor |
| CN202721522U (en) * | 2012-08-30 | 2013-02-06 | 湘电莱特电气有限公司 | Rotor for high speed permanent magnet synchronous motor |
| CN203554102U (en) * | 2013-11-12 | 2014-04-16 | 中山大洋电机股份有限公司 | Permanent magnetic motor structure reducing torque ripple of surface mounted permanent magnet rotor |
| CN104852495A (en) * | 2015-05-21 | 2015-08-19 | 浙江大学 | Permanent magnet fixing structure of surface-mounted high speed permanent magnet motor |
| CN107612166A (en) * | 2017-09-22 | 2018-01-19 | 沈端劼 | A kind of rotor with stacked protective metal shell |
| CN107749678A (en) * | 2017-11-27 | 2018-03-02 | 北京交通大学 | A kind of permanent magnet machine rotor sheath cooling structure device |
-
2018
- 2018-04-28 CN CN201810400499.3A patent/CN108599415B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020189306A1 (en) * | 2001-06-15 | 2002-12-19 | Lincoln Tsai | Magnetic lock mechanism |
| CN201119249Y (en) * | 2007-11-27 | 2008-09-17 | 沈阳工业大学 | A shielding cover |
| US20100019603A1 (en) * | 2008-07-28 | 2010-01-28 | Direct Drive Systems, Inc. | Rotor for an electric machine |
| CN102439824A (en) * | 2009-05-22 | 2012-05-02 | 阿塞里克股份有限公司 | An electric motor having a permanent magnet rotor |
| CN101924445A (en) * | 2010-09-01 | 2010-12-22 | 哈尔滨工业大学 | Permanent magnetic synchronous motor in wide weak-magnetic speed-regulating range |
| CN202721522U (en) * | 2012-08-30 | 2013-02-06 | 湘电莱特电气有限公司 | Rotor for high speed permanent magnet synchronous motor |
| CN203554102U (en) * | 2013-11-12 | 2014-04-16 | 中山大洋电机股份有限公司 | Permanent magnetic motor structure reducing torque ripple of surface mounted permanent magnet rotor |
| CN104852495A (en) * | 2015-05-21 | 2015-08-19 | 浙江大学 | Permanent magnet fixing structure of surface-mounted high speed permanent magnet motor |
| CN107612166A (en) * | 2017-09-22 | 2018-01-19 | 沈端劼 | A kind of rotor with stacked protective metal shell |
| CN107749678A (en) * | 2017-11-27 | 2018-03-02 | 北京交通大学 | A kind of permanent magnet machine rotor sheath cooling structure device |
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| Title |
|---|
| 董剑宁: "高速永磁电机设计与分析技术综述", 《中国电机工程学报》 * |
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| CN108599415B (en) | 2020-02-18 |
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