CN104426265B - The rotor structure for permanent magnet motor of high power density a kind of and apply its motor - Google Patents
The rotor structure for permanent magnet motor of high power density a kind of and apply its motor Download PDFInfo
- Publication number
- CN104426265B CN104426265B CN201310411199.2A CN201310411199A CN104426265B CN 104426265 B CN104426265 B CN 104426265B CN 201310411199 A CN201310411199 A CN 201310411199A CN 104426265 B CN104426265 B CN 104426265B
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- Prior art keywords
- rotor
- magnet steel
- magnetic wedge
- magnetic
- motor
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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
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
- H02K21/222—Flywheel magnetos
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a kind of rotor structure for permanent magnet motor of high power density and using its motor, which includes rotor case, rotor-exciting magnet steel, magnetic wedge；In gap between the N poles of the rotor-exciting magnet steel and S poles.Since magnetic wedge has higher mechanical strength, size can also be processed the very accurate of control, thus, after being installed on rotor, effect can also be supported to rotor-exciting magnet steel, strengthens the mechanical strength of rotor.In addition, when in use, since the thickness of the curvature between two rotor-exciting magnet steel is increased, magnetically saturated phenomenon is eased, the magnetic field ability that rotor-exciting magnet steel generates is strengthened.
Description
Technical field
The present invention relates to a kind of rotor technical fields, are that a kind of magneto of high power density turns specifically
Minor structure and apply its motor.
Background technology
Motor refers to realize a kind of electromechanical calutron that can be converted according to electromagnetic laws.Permanent magnet synchronous motor (PMSM),
Because its power density and electric efficiency are higher, thus play an increasingly important role in modern industry and household products.
In order to improve the power density of motor, the magnet steel of rotor needs to make using the high magnetic energy amount permanent-magnet material as neodymium iron boron.
The magnetic saturation phenomenon of motor rotor core is also just obvious.
A permanent magnet synchronous motor with outer rotor is shown in Fig. 1,2（PMSM）Basic structure, including rotor
1 ＇ of shell, 2 ＇ of rotor-exciting magnet steel, 3 ＇ of stator core and 4 ＇ of armature winding being wrapped on 3 ＇ of stator core.Fig. 3 is shown
The electromagnetic structure of the motor, the N poles of 2 ＇ of rotor-exciting magnet steel and S poles are alternately installed on 1 ＇ of rotor case.Due to volume and again
The limitation of amount, 1 ＇ of motor rotor casing can not be made thicker.
It can be seen from figure 4 that when 1 ＇ of rotor case as rotor yoke is relatively thin, magnetically saturated phenomenon can compare
Seriously.And the magnetic saturation of rotor yoke necessarily limits the ability that magnet steel generates effective magnetic field.But to many permanent magnet synchronous motors,
In order to reduce the weight of motor, the shell of rotor must be made very thin.In addition, in Fig. 4 it can also be seen that 3 ＇ magnetic of rotor case
Saturation place the most serious is located at the middle part of 2 ＇ of excitation magnet steel of a pair of N poles and S poles.
Realize high power density and efficient permanent magnet synchronous motor（PMSM）, it has to be possible to make full use of rotor
Excitation magnet steel generate magnetic field ability.When having used the high magnetic energy material as neodymium iron boron, the magnetically saturated journey of rotor rim
Degree is than more serious.This causes the performance of excitation magnet steel that can not be not fully exerted, and the power density of motor is restricted, motor effect
Rate can not be improved fully.
The content of the invention
It is a primary object of the present invention to provide a kind of rotor structure for permanent magnet motor of high power density and apply its electricity
Machine can overcome drawbacks described above, give full play to the ability that excitation magnet steel generates excitation field；Improve the power of permanent magnet synchronous motor
Density.
To achieve the above object, the technical solution adopted in the present invention is：
A kind of rotor structure for permanent magnet motor of high power density, including rotor case, rotor-exciting magnet steel, also into one
Step includes magnetic wedge；In gap between the N poles of the rotor-exciting magnet steel and S poles.Table in magnetic wedge and rotor case
Plane-plane contact is to be collectively formed rotor rim, so that the thickness of the magnetic wedge of rotor is increased.
Above-mentioned magnetic wedge is made using ferromagnetic material.
Above-mentioned magnetic wedge is one group, is that ferromagnetic material split as electrical sheet is used to shape.
Preferably, above-mentioned magnetic wedge is located at including annulus and one group of montant being fixedly arranged on annulus, this group of montant
In gap between the N poles of the rotor-exciting magnet steel and S poles.
Preferably, above-mentioned magnetic forming wedge is cylindrical body, is evenly arranged on the barrel of the cylindrical body to house and turns
The slot of sub- excitation magnet steel；The rotor-exciting magnet steel is uniformly installed in the slot, and the bar between each slot is located at described
The N poles of rotor-exciting magnet steel and S poles between gap in.
Preferably, above-mentioned magnetic wedge is the magnet steel magnetic wedge set there are two symmetrical inclined-plane, and two inclined-planes are respectively configured to α
Angle, the α angles are more than zero；The magnet steel magnetic wedge passes through two inclined-planes and a pair of of pole of the rotor-exciting magnet steel
Connect.
It is above-mentioned to there is magnetic wedge to be made using permanent-magnet steel.
Preferably, above-mentioned magnetic wedge has further included ferromagnetic magnetic wedge, and the magnet steel magnetic wedge with ferromagnetic magnetic wedge is spaced and sets successively
In gap between the N poles of the rotor-exciting magnet steel and S poles.
A kind of permanent magnet synchronous motor, including above-mentioned motor rotor construction and stator structure, the stator structure bag
Include stator core and the armature winding being wrapped on stator core.
After adopting the above technical scheme, since magnetic wedge is made of the material as electrical sheet, there is higher machinery
Intensity, size can also be processed the very accurate of control, thus, it, can also be to rotor-exciting after being installed on rotor
Magnet steel is supported effect, strengthens the mechanical strength of rotor.In addition, when in use, due between two rotor-exciting magnet steel
The thickness of curvature is increased, and magnetically saturated phenomenon is eased, and the magnetic field ability that rotor-exciting magnet steel generates is added
By force.
Description of the drawings
Fig. 1 is the dimensional structure diagram of existing permanent magnet synchronous motor；
Fig. 2 is the combination diagram of existing permanent magnet synchronous motor；
Fig. 3 is the electromagnetic structure schematic diagram of existing permanent magnet synchronous motor；
Fig. 4 is the Distribution of Magnetic Field situation of existing permanent magnet synchronous motor；
Fig. 5 is the dimensional structure diagram of rotor structure embodiment one of the present invention；
Fig. 6 is the planar structure schematic diagram of rotor structure example example one of the present invention；
Fig. 7 is the dimensional structure diagram of synchronous motor embodiment one of the present invention；
Fig. 8 is the planar structure schematic diagram of synchronous motor embodiment one of the present invention；
Fig. 9 is the Distribution of Magnetic Field figure of the synchronous motor of the embodiment of the present invention one；
Figure 10 is the dimensional structure diagram of synchronous motor embodiment two of the present invention；
Figure 11 is the dimensional structure diagram of synchronous motor embodiment three of the present invention；
Figure 12 is the structure diagram of synchronous motor example IV of the present invention；
Figure 13 be synchronous motor example IV of the present invention the magnetizing direction of magnetic wedge and the magnetizing direction of excitation magnet steel and
Main field circuit schematic diagram；
Figure 14 is the Distribution of Magnetic Field figure of synchronous motor example IV of the present invention；
Figure 15 is the structure diagram of synchronous motor embodiment five of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one：
With reference to shown in figure 5,6, the invention discloses a kind of motor rotor construction of high power density, including rotor case
1st, rotor-exciting magnet steel 2, magnetic wedge 5, wherein：
Magnetic wedge 3 is made with ferrimagnet, is set to one group, is respectively arranged on N poles and the S of rotor-exciting magnet steel 2
In gap between pole.In the specific implementation, magnetic wedge 5 can the ferromagnetic material as electrical sheet be made, in addition, magnetic wedge
5 be using split type, is shaped one by one.The ferrimagnet as electrical sheet is come after manufacturing magnetic wedge 5, mechanical strength
Very high, size can be processed the very accurate of control, thus, the magnetic wedge 5 made by ferromagnetic material, on rotor is installed to
Afterwards, effect can also be supported to rotor-exciting magnet steel 2, strengthens the mechanical strength of rotor.
Refering to what is shown in Fig. 9, when in use, since the thickness of the curvature between two rotor-exciting magnet steel 2 is increased
Add, magnetically saturated phenomenon is eased, and the magnetic field ability that rotor-exciting magnet steel 2 generates is strengthened.
With reference to shown in figure 7,8, the invention also discloses a kind of permanent magnet synchronous motor using above-mentioned rotor structure, including
Rotor case 1, rotor-exciting magnet steel 2, stator core 3, armature winding 4 and magnetic wedge 5, wherein：
Armature winding 4 is wrapped on stator core 3.
With reference also to Fig. 9, since magnetic wedge 3 is made with ferrimagnet, not only there is mechanical support to make
With the rotor strength of entire motor is made to be strengthened；Moreover, make the thickness of the curvature between two rotor-exciting magnet steel 2
Increased, magnetically saturated phenomenon is eased, and the magnetic field ability that rotor-exciting magnet steel 2 generates is made to be strengthened.
Embodiment two：
Refering to what is shown in Fig. 10, its structure diagram for the permanent magnet synchronous motor embodiment two of the present invention, with embodiment one
It compares, the difference is that：
In the present embodiment, magnetic wedge 5, one group of montant 52 including an annulus 51 and on annulus 51, in the present embodiment
In, the montant 52 and annulus 51 are integrally formed, in use, montant 52 is located at the sky between the N poles of rotor-exciting magnet steel 2 and S poles
In gap.
Integrated design makes assembly precision more preferably control, and assembling is more convenient.And the machinery for preferably strengthening rotor is strong
Degree.
Embodiment three：
It is the structure diagram of the embodiment three of permanent magnet synchronous motor of the present invention, with embodiment one with reference to shown in figure 11
It compares, the difference is that：
In the present embodiment, magnetic wedge 5, is configured to cylindrical body, be evenly arranged on the barrel of the cylindrical body can house turn
The slot 53 of sub- excitation magnet steel 2.In use, rotor-exciting magnet steel 2 is uniformly installed in the slot 53,52, the bar between each slot 53
In gap between the N poles of rotor-exciting magnet steel 2 and S poles.The structure of this magnetic wedge 5 not only increases the position of rotor case 1
The rotor rim thickness in the gap between the N poles of rotor-exciting magnet steel 2 and S poles, while also enhance rotor case 1 and rotor
Excitation magnet steel 2 is in contact the thickness of position.Therefore, not only there is mechanical support effect, obtain the rotor strength of entire motor
To reinforcement；Moreover, making the thickness of entire rotor rim be increased, magnetically saturated phenomenon is eased, and makes rotor-exciting magnet steel 2
The magnetic field ability of generation is strengthened.
Example IV：
It is the structure diagram of the example IV of permanent magnet synchronous motor of the present invention, with embodiment one with reference to shown in figure 12
It compares, the difference is that：
In the present embodiment, magnetic wedge 5 is made using high performance permanent magnet steel.And magnetic wedge 5 sets that there are two symmetrical
Inclined-plane 54, the inclined-plane 54 are configured to α angles, which is more than zero.In assembling, magnetic wedge 5 passes through the two inclined-planes 54 and rotor-exciting
A pair of of pole of magnet steel 2 connects.With reference to shown in figure 13, after the yoke of rotor case 1 is installed to, the magnetizing direction of magnetic wedge 5 and turn
The difference of sub- excitation magnet steel 2, the two is close to vertically.The magnetizing direction of magnetic wedge 5 and the contact surface of rotor-exciting magnet steel 2 enable to
A part of magnetic field is passed by from magnetic wedge 5 caused by excitation magnet steel, so as to slow down the magnetic saturation phenomenon of rotor rim；In addition, magnetic
The magnetic direction of wedge 5 and the magnetic direction of rotor-exciting magnet steel 2 can form field circuit, see the magnetic loop 61 of Figure 13.Therefore,
Magnetic wedge 5 can strengthen the magnetic field of motor gas-gap, so as to improve the efficiency of the power density of motor and motor.With reference to shown in figure 14,
There it can be seen that a part of magnetic field caused by rotor-exciting magnet steel 2 from magnetic wedge 5 by thus alleviating rotor rim
Degree of saturation.
Embodiment five：
It is the structure diagram of the embodiment five of permanent magnet synchronous motor of the present invention, with example IV with reference to shown in figure 15
It compares, the difference is that：
In the present embodiment, magnetic wedge 5 includes magnet steel magnetic wedge 55 and ferromagnetic magnetic wedge 56, in the magnet steel magnetic wedge 55 and example IV
5 structure of magnetic wedge it is identical, there is symmetrical inclined-plane 551,552, magnet steel magnetic wedge 55 passes through two inclined-planes 551,552 and rotor-exciting magnetic
A pair of of pole of steel 2 connects.Magnet steel magnetic wedge 55 and ferromagnetic magnetic wedge 56 are spaced successively arranged between the N poles of rotor-exciting magnet steel 2 and S poles
Gap in.
After the magnetic wedge 5 of the structure is installed to the yoke of rotor, the magnetizing direction of magnet steel magnetic wedge 55 and rotor-exciting magnet steel 2
Difference, the two is close to vertically.The magnetizing direction of magnet steel magnetic wedge 55 and with the contact surface of rotor-exciting magnet steel 2 rotor is enabled to encourage
It passes by from magnetic wedge magnet steel in a part of magnetic field caused by magnetic magnet steel 2.This structure, on the one hand, rotor rim can be improved
Magnetic saturation degree, and increase the power density of motor.On the other hand, since magnetic wedge is made using ferromagnetic material, magnet steel obtains
Support, the mechanical strength of rotor are enhanced.Furthermore using the rotor of mixing magnetic wedge, it can realize the motor of high power density
And improve the efficiency of motor.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
Subject to.
Claims (2)
1. a kind of rotor structure for permanent magnet motor of high power density, including rotor case, rotor-exciting magnet steel, feature exists
In：It further comprises magnetic wedge, and magnetic wedge includes magnet steel magnetic wedge and ferromagnetic magnetic wedge, and magnet steel magnetic wedge there are two it is symmetrical tiltedly
Face, the inclined-plane are configured to α angles, which is more than zero, a pair that the magnet steel magnetic wedge passes through the two inclined-planes and rotor-exciting magnet steel
Pole connects, and the magnetizing direction of the magnet steel magnetic wedge and the magnetic direction of rotor-exciting magnet steel form magnetic loop, the magnet steel magnetic
Wedge and ferromagnetic magnetic wedge are spaced successively in the gap between the N poles of the rotor-exciting magnet steel and S poles.
2. a kind of permanent magnet synchronous motor, it is characterised in that：It includes stator structure and rotor knot described in claim 1
Structure, the stator structure include stator core and the armature winding being wrapped on stator core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310411199.2A CN104426265B (en) | 2013-09-10 | 2013-09-10 | The rotor structure for permanent magnet motor of high power density a kind of and apply its motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310411199.2A CN104426265B (en) | 2013-09-10 | 2013-09-10 | The rotor structure for permanent magnet motor of high power density a kind of and apply its motor |
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| CN104426265A CN104426265A (en) | 2015-03-18 |
| CN104426265B true CN104426265B (en) | 2018-06-01 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109904951A (en) * | 2017-12-11 | 2019-06-18 | 北京金风科创风电设备有限公司 | Ultra-high-speed permanent magnet disc type motor and mounting method thereof |
| CN110048525B (en) * | 2019-01-12 | 2021-06-01 | 珠海市磐石电子科技有限公司 | Magnetic group unit, magnetic array thereof, motor, servo device and running device |
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|---|---|---|---|---|
| US5109172A (en) * | 1989-04-26 | 1992-04-28 | Pace Sang H L | Permanent magnet motor having diverting magnets |
| CN2147678Y (en) * | 1993-03-06 | 1993-11-24 | 朱殿兴 | Magnetic rotator of motive vehicle generator |
| CN1375122A (en) * | 1999-09-20 | 2002-10-16 | 埃科艾尔公司 | Permanent magnet rotor portion for electric machines |
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| CN102545515A (en) * | 2012-01-19 | 2012-07-04 | 天津清源电动车辆有限责任公司 | Permanent-magnet motor based on Halbach array for electric automobile hub |
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| CN203607946U (en) * | 2013-09-10 | 2014-05-21 | 峰岹科技（深圳）有限公司 | Permanent magnet motor rotator structure having high power density and motor employing structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5076521B2 (en) * | 2007-01-31 | 2012-11-21 | 株式会社デンソー | Starter motor |
| AU2011313817B2 (en) * | 2010-10-08 | 2015-06-11 | Global Motors Invent Pty Ltd | Electromagnetic machine |
| KR101566047B1 (en) * | 2011-03-29 | 2015-11-05 | 한양대학교 산학협력단 | Spoke type permanent magnet motor |
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2013
- 2013-09-10 CN CN201310411199.2A patent/CN104426265B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5109172A (en) * | 1989-04-26 | 1992-04-28 | Pace Sang H L | Permanent magnet motor having diverting magnets |
| CN2147678Y (en) * | 1993-03-06 | 1993-11-24 | 朱殿兴 | Magnetic rotator of motive vehicle generator |
| CN1375122A (en) * | 1999-09-20 | 2002-10-16 | 埃科艾尔公司 | Permanent magnet rotor portion for electric machines |
| CN102195403A (en) * | 2011-05-19 | 2011-09-21 | 乔鸣忠 | Large-gap and low-noise engine-propeller integrated permanent magnet propulsion unit |
| JP2013031290A (en) * | 2011-07-28 | 2013-02-07 | Nishishiba Electric Co Ltd | High-speed permanent-magnet rotary electric machine |
| CN102545515A (en) * | 2012-01-19 | 2012-07-04 | 天津清源电动车辆有限责任公司 | Permanent-magnet motor based on Halbach array for electric automobile hub |
| CN203607946U (en) * | 2013-09-10 | 2014-05-21 | 峰岹科技（深圳）有限公司 | Permanent magnet motor rotator structure having high power density and motor employing structure |
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| CN104426265A (en) | 2015-03-18 |
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Address after: 518000 Shenzhen Software Park, 1 Shenzhen Software Park (2 phase), No. 2, No. 1, Nanshan District high tech District, Shenzhen City, Guangdong province (limited office) Patentee after: Fengji Technology (Shenzhen) Co., Ltd Address before: 203, room 11, building two, two software park, Shenzhen Road, Nanshan District science and technology, Guangdong, Shenzhen 518057, China Patentee before: FORTIOR TECHNOLOGY (SHENZHEN) Co.,Ltd. |
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