CN105305683A - Rotor for electrical machine - Google Patents
Rotor for electrical machine Download PDFInfo
- Publication number
- CN105305683A CN105305683A CN201510438418.5A CN201510438418A CN105305683A CN 105305683 A CN105305683 A CN 105305683A CN 201510438418 A CN201510438418 A CN 201510438418A CN 105305683 A CN105305683 A CN 105305683A
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- China
- Prior art keywords
- rotor
- permanent magnet
- recess
- ferromagnetic structure
- motor
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- 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.)
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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
- H02K1/06—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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a rotor (1) for an electrical machine. The rotor includes a first permanent magnet (21) and a ferromagnetism structure (3) having an outside (4) on the radially outer. The ferromagnetism structure (3) is used for surrounding at least a part of the first permanent magnet (21). A first interzonal region (81) of the ferromagnetism structure (3) is disposed between the transverse side (6) of the outside (4) of the first permanent magnet (21) and a radial backoff part (42) of ferromagnetism structure (3) relative to the first permanent magnet (21). The backoff part (42) includes material of which permeability is less than that of the ferromagnetism structure (3).
Description
Technical field
The present invention relates to a kind of for motor, especially for the rotor of motor, comprise the first permanent magnet and have the ferromagnetic structure in radial outer outside, wherein, ferromagnetic structure is designed for and surrounds the first permanent magnet at least partially.
Background technology
By the known a kind of motor of prior art, the multiple possible execution mode of the particularly rotor of motor.Especially there is known a kind of rotor by prior art, it is (English: Internal-Permanentmagnet-Motors internal permanent magnet rotor that it has permanent magnet that is inner, that be namely arranged in internal rotor; Be called for short IPM).
Motor or not only there is reluctance torque with the rotor (IPM) of interior permanent magnets but also there is the torque formed by the magnetic interaction between the pole of the stator at motor and interior permanent magnets.
The possible shortcoming with the motor of the rotor with interior permanent magnets is, the magnetic field of permanent magnet also exists when no-load run (idle running) of motor.Permanent magnet in the winding of stator, generate reverse voltage (reverse motor power relative to the magnetic field along with time variations of stator; Be called for short reverse EMK), the voltage of reverse voltage to the winding place being applied to stator has the opposite effect.If the reverse EMK generated exceedes applied voltage, the constant torque of motor so just can not be maintained when the rotating speed of rotor promotes.
In order to reduce the magnetic field of the coupling in rotor itself of permanent magnet, conventionally air lock can be set at the internal rotor of motor.This air lock is such as by known in public publication DE102008058347A1 and DE112010005756T5.
Summary of the invention
The present invention is based on following object, improve the rotor of motor.
According to of the present invention for motor, comprise the first permanent magnet especially for the rotor of motor and there is the ferromagnetic structure in radial outer outside, wherein, ferromagnetic structure is designed for and surrounds the first permanent magnet at least partially.According to the present invention, the first zone line of ferromagnetic structure is provided with between the transverse side deviating from outside of the first permanent magnet and the recess of the radial more inner relative to the first permanent magnet of ferromagnetic structure, wherein, recess comprises a kind of material with the magnetic permeability less than ferromagnetic structure.
Direction: axially, radial and be all the pivot center about rotor by orientation (azimutal), and form cylindrical-coordinate system (rotor coordinate) on the whole.
Generally can both be placed in motor according to rotor of the present invention, such as, be placed in motor and/or the generator of electrically driven (operated) motor vehicle.Below motor is considered as comprising the motor according to rotor of the present invention.
Reluctance torque is produced by the interaction in the magnetic field by ferromagnetic structure and motor stator according to rotor of the present invention.
Additionally, the magnetic field of permanent magnet contributes to the torque of motor further, and this motor comprises according to rotor of the present invention.
According to the present invention, there is the first zone line being radially provided with ferromagnetic structure between the recess of the magnetic permeability less than ferromagnetic structure and the transverse side deviating from the outside of rotor of the first permanent magnet.This zone line is especially ferromagnetic.
Run with constant torque (armature adjustable range) in the working point of its power curve according to the motor of rotor of the present invention if comprised, so the first zone line magnetic saturation due to the magnetic field of stator.By making the first zone line magnetic saturation, and by making recess have very little magnetic permeability, the inductivity L of the d axis of rotor
d(d axle inductance) reduces.By reducing the inductivity L of d axis
d, advantageously expand the torque of motor.In general advantageously, the inductivity L little as far as possible of d axis is realized
dand realize the inductivity L large as far as possible of q axis
q(q axis inductance).In other words, when the difference numerically between d axis and the inductivity of q axis increases, the torque magnification of motor.
What make further contribution to the torque of motor is the magnetic field of the first permanent magnet, and this permanent magnet is surrounded by ferromagnetic structure at least in part.First permanent magnet such as can be arranged on the outside of rotor (English: the machine of the surface-mounted permanent magnet of Surface-Mounted-Permanentmagnets-Machine; Be called for short SMPM) or be arranged in the inside of ferromagnetic structure (IPM).
Preferably, motor comprises multiple permanent magnet.At this, the region of ferromagnetic structure constructs round the corresponding permanent magnet according to the first permanent magnet.In other words, rotor has multiple first permanent magnet.First permanent magnet or surrounding of multiple permanent magnet can form fit ground, material fit ground and/or power be undertaken by ferromagnetic structure with connecting.
By making the first ferromagnetism zone line magnetic saturation, weakening the magnetic field of permanent magnet, thus desirably reducing reverse EMK.Reducing reverse EMK is favourable when the no-load run of motor especially.
If oppositely EMK is too large, so motor is with constant Power operation (field control scope).In adjustable range on the scene, by the d current i that will bear
dbe applied on the winding of stator, the first ferromagnetism zone line degaussing can be made saturated.By making the first zone line degaussing saturated, expand the magnetic field of the first permanent magnet in an advantageous manner, thus can lifting motor torque in adjustable range on the scene.
Another advantage of recess is, reduce the loss in ferromagnetic structure, because recess comprises a kind of material, this material has the magnetic permeability less than ferromagnetic structure and particularly can not conduct electricity.In addition, recess achieves guiding to magnetic field or total magnetic field or adjustment.In other words, the directed bunchy of the magnetic field line of magnetic field or total magnetic field can be made by recess, thus make in magnetic field concentration air gap between the stator and the rotor, thus can the torque of lifting motor further.In addition, by recess, the moment of inertia that particularly can be reduced rotor by multiple recess in an advantageous manner.For this reason, this recess comprises a kind of material, and its density is less than the density of ferromagnetic structure.
Preferably, this recess comprises air as material.In other words, the recess of ferromagnetic structure filled by air hollow chamber, namely formed by the air lock of ferromagnetic structure.
According to a kind of favourable design of the present invention, the first side place being arranged in the first permanent magnet at least partially of recess.
Further reduce the inductivity along d axis thus in an advantageous manner, thus further increase the torque of motor.In addition, the magnetic field of the first permanent magnet is aimed at and bunchy towards air gap.In addition, can desirably reduce and cause loss and the stray field unhelpful to the torque of motor.
In order to improve rotor further, preferably arrange another recess at the second side place opposite with the first side of permanent magnet.
Further improve efficiency and the torque of motor thus.
In particularly preferred design of the present invention, recess almost extends along the whole transverse side of the first permanent magnet.
Thus by rotor in other words by the ferromagnetic structure of rotor achieve to stator, the favourable guiding in the magnetic field that causes reluctance torque or guiding.The magnetic field of stator is substantially directed in ferromagnetic structure or therefrom along the q axis of rotor and is exported, and directed in ferromagnetic structure round the first permanent magnet by the recess almost along the whole transverse side extension of the first permanent magnet.Therefore increase the inductivity of q axis, thus improve the torque of motor further.
According to a kind of favourable design, rotor comprises the second permanent magnet be surrounded at least in part by ferromagnetic structure, wherein, the first and second permanent magnet V-arrangements ground are arranged, and are provided with the second zone line of ferromagnetic structure by orientation between the first and second permanent magnets.
In other words, the permanent magnet arranged by V-arrangement constitutes the V-arrangement magnetic pole of rotor.At this, the magnetized portion of two permanent magnets is conically directed toward each other, thus realizes the magnetic field that produced by permanent magnet advantageously bunchy or focus at least partly in the air gap of motor by the layout of V-arrangement.In other words, the magnetic field line in the magnetic field of permanent magnet concentrates in air gap.In addition, advantageously achieved the larger width of magnetic pole by the layout of this V-arrangement, thus further enhancing the magnetic field in air gap.
The V-arrangement of two permanent magnets is arranged and is found out by the axial section of rotor especially.The V-arrangement of two permanent magnets arranges it is such as following layout, and it is equivalent to the geometry of alphabetical V substantially in the axial section of rotor, and wherein, two supporting leg the aid of permanent magnets of alphabetical V are formed.Contrary with the geometry of alphabetical V, the direct connecting portion of supporting leg (the first and second permanent magnets) is not set, but has the second zone line of ferromagnetic structure by orientation between the first and second permanent magnets.The second zone line magnetic saturation can be made thus, thus further reduce the inductivity of d axis.Advantageously improve the torque of motor thus further.
Preferably, the second zone line is configured to rectangle, and aspect ratio is greater than two.
The magnetic saturation of the second zone line has been realized thus by more weak magnetic field.
In addition, in a kind of favourable structural scheme of the present invention, recess is configured to L shape.
In other words, recess almost has the geometry of alphabetical L in the axial section of rotor.In an advantageous manner, extending compared with first transverse side of long leg along the first permanent magnet of recess, and shorter supporting leg is along the first side extension of the first permanent magnet.
According to a kind of favourable improvement project of the present invention, the first ferromagnetism zone line is configured to wedge shape and/or triangle.
In the axial section of rotor, the first ferromagnetism zone line has leg-of-mutton geometry.Advantageously improve the trend of magnetic field line in magnetic field of the first permanent magnet, the second permanent magnet or multiple permanent magnet, particularly adjacent permanent magnet thus.The radial direction that the magnetic field particularly decreasing permanent magnet enters into ferromagnetic structure stretches into the degree of depth.
According to favourable design of the present invention, the first and/or second permanent magnet is configured to Halbach array (Halbach-Array).
The advantage of Halbach array based on, magnetic field extends substantially in the air gap radially between stators and rotators.Such as, Halbach array can be formed by multiple independent permanent magnet, thus the magnetic field of (internal rotor) is weakened in a radially inward direction by the special arrangement of each permanent magnet, and its in air gap (rotor exterior) is enhanced and/or is concentrated.By weakening the magnetic field of internal rotor, decrease due in rotor or loss that the eddy current of ferromagnetic structure inside occurs.In addition, by that strengthen in air gap and/or concentrated magnetic field for motor provides higher torque, and power density is improved.In general, even can abandon common yoke, reduce the moment of inertia of rotor thus further.
In the IPM known according to prior art, the trend in magnetic field can close to rectangle in air gap.The steep shaping seamed edge of rectangle causes producing higher harmonious share.The seamed edge making these steep by using Halbach array is level and smooth, thus realizes almost sinusoidal or cosine form and the thus spatially harmonious trend of magnetic field in space.
According to particularly advantageous design of the present invention, rotor has the ferromagnetic structure of plum blossom-shaped (rossettenartigen), ferromagnetism minor structure that this structure extends by multiple radial direction, column is formed, wherein, the minor structure of column is arranged evenly distributedly by ground, orientation round the pivot center of rotor, is had recess respectively and the recess having at least one other between the minor structure of two adjacent columns respectively.
At this, the design of the mentioned plum blossom-shaped of ferromagnetic structure is found out in the axial section of ferromagnetic structure or rotor.By the design of the special plum blossom-shaped of ferromagnetic structure, achieve multiple recess, thus decrease the moment of inertia of rotor.The permanent magnet of rotor is radially fixed by the minor structure of column.In addition, the ferromagnetic structure of plum blossom-shaped is similar with the colored window (Fensterrose) of the window of building in its geometrical construction.The minor structure of column to extend to the outer outside of the radial direction of rotor at this from the region that the radial direction of rotor is inner.It is such as arranged round the axle that the radial direction of rotor is inner equably by ground, orientation, and fixing or torque is fixed on axle place ordinatedly.
In addition, the multiple plum blossom design by being consistent with the design of ferromagnetic structure can optimize the guiding to magnetic field or total magnetic field.Therefore, the ferromagnetic structure of plum blossom-shaped combines mechanical advantage and electromagnetism advantage synergistically.Accompanying drawing explanation
Other advantages of the present invention, characteristic sum details are from embodiment described below and draw with reference to the accompanying drawings.Shown in it:
Fig. 1 is the axial cross-sectional views of the rotor of the ferromagnetic structure with annular, and wherein, this structure surrounds multiple adjacent permanent magnet, and this structure has multiple recess;
Fig. 2 is the axial cross-sectional views of the rotor with plum blossom-shaped ferromagnetic structure; And
Fig. 3 is the axial cross-sectional views of the rotor section of the rotor of motor.
Identical or equivalent element can be furnished with same Reference numeral in the accompanying drawings.
Embodiment
Direction: axially 100, radial 101 and by orientation 106 always about the pivot center 100 of rotor 1, and constitute cylindrical-coordinate system (rotor coordinate) on the whole.
Figure 1 illustrates the axial cross-sectional views with the rotor 1 of the ferromagnetic structure 3 of annular of unshowned motor.Ferromagnetic structure 3 can be configured to sheet, and comprises multiple permanent magnet 21,22 adjacent by orientation, and wherein, each first permanent magnet 21 and the second permanent magnet 22 constitute a magnetic pole 24 of rotor 1.Permanent magnet 21,22 are partly surrounded by ferromagnetic structure 3 form fit ground, material fit ground and/or power with connecting.In addition, the ferromagnetic structure 3 of rotor 1 has multiple recess 42, and this recess 42 is configured to air lock 42.In order to improve mechanical stability, the recess 42 in other words angle of air lock 42 and/or seamed edge can be rounding.Rotor 1 can by multiple plates according to execution mode axially lit-par-lit structure shown in FIG.
In addition, in order to reduce eddy current, rotor 1 can not have magnetic central layer on axial direction 100.
Rotor 1 shown in Fig. 1 has the magnetic pole 24 of eight same form.The quantity of magnetic pole 24 can adjust according to object.The permanent magnet 21,22 of magnetic pole 24 is almost entirely surrounded by ferromagnetic structure 3, and arranges in shown axial section V-arrangement.
Exemplarily observe the first permanent magnet 21 of magnetic pole 24 below.
The first ferromagnetism zone line 81 of ferromagnetic structure 3 is arranged between the transverse side 6 and recess 42 of the first permanent magnet 21.First ferromagnetism zone line 81 is configured to triangle.In addition, the transverse side 6 of the first permanent magnet 21 deviates from the outside 4 of rotor 1.In other words, the first ferromagnetism zone line 81 is radially between the inner transverse side 6 of the radial direction of the first permanent magnet 21 and recess 42.In addition, recess 42 almost extends along the whole transverse side 6 of the first permanent magnet 21.
At least one part 421 of recess 42 is arranged at the first side 5 place of the first permanent magnet 21.In other words, recess 42 has the shape of L, and wherein, the short supporting leg of L shape is directly arranged in the first permanent magnet 21 place at the first side 5 place, and the supporting leg of the length of L shape almost extends on the whole transverse side 6 of the first permanent magnet 21.The short supporting leg of L shape at this almost radially, and the supporting leg of the length of L shape substantially by orientation ground extend.
Another recess 43 is connected at the second side 7 place of the first permanent magnet 21.At this, recess 42,43 are configured to the hollow chamber in ferromagnetic structure 3, thus recess 42 and another recess 43 are filled with air.Hence improve the moment of inertia of rotor 1.
If the embodiment of the layout mentioned is at the d axis 103 place Mirror Symmetry of rotor 1, the layout of the second permanent magnet 22 and the corresponding layout of recess 42,43 and design are from drawing of having mentioned for the first permanent magnet 21.Therefore, such as two of corresponding L shape recess 42 short supporting legs are opposite by ground, orientation.The d axis 103 of rotor 1 extends in radial directions, and almost placed in the middle through magnetic pole 24 by ground, orientation.It should be noted that, rotor 1 has multiple d axis 103 and q axis 102, and it is subordinated to corresponding magnetic pole 24.
By recess 42,43, guide the magnetic field (magnetic flux density) with exemplary magnetic field line 104 in the inside of the ferromagnetic structure 3 of rotor 1, this magnetic field is by permanent magnet 21, and 22 cause.Particularly the first ferromagnetism zone line 81 is magnetically saturated based on the magnetic field of the first and/or second permanent magnet 21.Reduced the inductivity (d axis inductance) of the d axis of rotor 1 by the magnetic saturation of the first ferromagnetism zone line 81, and therefore increase the torque of the motor comprising rotor 1.
Based on this ferromagnetic structure 3, interaction that is that magnetic occurs for rotor 1 and the magnetic field of unshowned stator or electro permanent magnetic, generation reluctance torque.The magnetic field being subordinated to reluctance torque is walked by the exemplary space of magnetic field line 105 and is always illustrated.The magnetic field of stator enters and/or leaves ferromagnetic structure 3 along the q axis 102 of rotor 1 substantially.
The second ferromagnetism zone line 82 that is microscler, rectangle of ferromagnetic structure 3 is arranged by orientation between two adjacent recess 42.By the thinner design by orientation of the second zone line 82, further reduce the inductivity of the d axis 103 of rotor 1, thus correspondingly can expand the torque of motor further with minimizing degree.
If the motor comprising rotor 1 runs with constant torque, namely within armature adjustable range, so the first and second ferromagnetism zone lines 81,82 of ferromagnetic structure 3 are magnetically saturated, thus make the inductivity of d axis 103 reduce relative to the inductivity of q axis 102 generally.In other words, the rotor 1 in FIG achieve increase d axis 103 and difference numerically between the inductivity of q axis 103, thus in armature adjustable range, improve the torque of motor.
If by permanent magnet 21, the voltage (reverse motor power) that the magnetic field of 22 generates in the winding inside of stator, particularly excessive under no-load run state, so motor no longer runs with constant torque, but with constant Power operation (field control scope).Within adjustable range on the scene advantageously, by negative d current-induced in the winding of stator.Weaken the magnetic field of the permanent magnet 21,22 of rotor 1 thus.By the magnetic field of mentioned weakening permanent magnet 21,22, decrease reverse EMK, this is particularly favourable when motor is in no-load run.
When motor runs under a load, another advantage of shown rotor 1 is, by negative d electric current with consequently make permanent magnet 21, the magnetic field of 22 is reduced or weakened and makes at least the first ferromagnetism zone line 81 degaussing of rotor 1 saturated.The torque of motor can be improved thus in adjustable range on the scene, increase because the magnetic field of permanent magnet 21,22 contributes to torque.
Fig. 2 shows the axial cross-sectional views of the rotor 1 with plum blossom-shaped ferromagnetic structure 3 of motor.At this, rotor 1 has multiple permanent magnet 21,22, and wherein, the magnetic pole 24 of rotor 1 is formed by the first and second permanent magnets 21,22.Generally, the rotor 1 in Fig. 2 has the magnetic pole 24 of 12 identical types.The quantity of magnetic pole 24 can change according to application.
The ferromagnetic structure 3 of the plum blossom-shaped of rotor 1 is formed by the ferromagnetism minor structure 30 of the column of multiple radial direction extension.At this, minor structure 30 has recess 42 respectively.
Inner at magnetic pole 24, recess 42 is configured to triangle in the embodiment shown, and wherein, the microscler side that the radial direction of leg-of-mutton recess 42 is outer is radially positioned at permanent magnet 21, the below of 22, and by ground, orientation along permanent magnet 21, the transverse side 6 of 22 extends.In addition, the first ferromagnetism zone line 81 of ferromagnetic structure 3 is radially positioned at recess 42 and the first and second permanent magnets 21, between 22.Second ferromagnetism zone line 82 is arranged in the first and second permanent magnets 21, between 22 by orientation.
In addition, by the uniform layout by orientation of the minor structure 30 of column, have also been constructed other recess 43, thus achieve the plum blossom-shaped structure of rotor 1.At this, the minor structure 30 of column constructs as follows and arranges, makes in axial section, produce the pattern meeting colored window shape formula.It has multiple arch, wherein, arch by orientation round rotor 1 or the pivot center 100 of motor arrange.In general, can imagine multiple plum blossom-shaped designs of ferromagnetic structure 3 to optimize rotor 1, these designs are matched with the requirement of mechanical load and electro permanent magnetic.
Rotor 1 has the circular open arranged with one heart with pivot center 100, and this opening achieves and makes column minor structure 30 and therefore make rotor 1 be fixed on generally on the axle of motor.At this, it is suitable for rotor 1 torque being fixed or be fastened on unshowned axle place ordinatedly especially.
The axial cross-sectional views of the rotor section 25 of another rotor 1 of motor has been shown in Fig. 3.Shown rotor section 25 has at least one the first permanent magnet 21 and recess 42.As illustrated in earlier drawings, the second permanent magnet 22 can be set.The recess 42 of the ferromagnetic structure 3 of rotor section 25 is configured to air lock 42.The first ferromagnetism zone line 81 of ferromagnetic structure 3 is radially arranged between the inner transverse side 6 of the radial direction of permanent magnet 21 and recess 42.
Supplementing as Fig. 1 and/or Fig. 2, the rotor section 25 in Fig. 3 has connecting portion (Steg) 50, and this connecting portion 50 is configured to a part for ferromagnetic structure 3, and by orientation, recess 42 is divided into two sub regions.At this, connecting portion 50 substantially radially direction 101 extend.Connecting portion 50 can be arranged for mechanically stablizing shown rotor section 25.In addition, corresponding connecting portion 50 can be set for the rotor 1 shown in Fig. 1 and/or Fig. 2.
By the rotor 1 shown in accompanying drawing, achieve the magnetic flux path (exemplarily by magnetic field line 104,105 illustrate) with different magnetic permeabilitys, thus improve reluctance torque and reduce the inductivity of d axis 103.In addition, by the first zone line 81 and the d electric current and/or the q electric current that pass through the winding inside controlling stator, adaptive, to control and/or regulate permanent magnet 21,22 magnetic field.At this, d electric current and/or q electric current can adapt to the required torque of motor, speed and voltage levvl.In addition, such as by rotor 1 in other words ferromagnetic structure 3 plum blossom-shaped structure, the moment of inertia of rotor 1 can be reduced, which thereby enhance power of motor.In addition, achieve utilize multiple known manufacture method manufacture rotor 1.
Although at large set forth in detail by preferred embodiment and describe the present invention, the present invention is not limited to disclosed example, and those skilled in the art can derive other variant thus, and do not leave protection scope of the present invention.
Claims (11)
1. the rotor for motor (1), comprise the first permanent magnet (21) and there is the ferromagnetic structure (3) in radial outer outside (4), wherein, described ferromagnetic structure (3) is designed for and surrounds described first permanent magnet (21) at least partially, it is characterized in that, first zone line (81) of described ferromagnetic structure (3) is provided with between the transverse side (6) deviating from described outside (4) of described first permanent magnet (21) and the recess (42) of the radial more inner relative to described first permanent magnet (21) of described ferromagnetic structure (3), and described recess (42) comprises the material with the magnetic permeability less than described ferromagnetic structure (3).
2. rotor according to claim 1 (1), is characterized in that, described recess (42) comprises air as material.
3. rotor according to claim 1 and 2 (1), it is characterized in that, at least one part (421) of described recess (42) is arranged in the first side (5) place of described first permanent magnet (21).
4. according to rotor in any one of the preceding claims wherein (1), it is characterized in that, arrange another recess (43) at the second side (7) place opposite with described first side (5) of permanent magnet (21).
5. according to rotor in any one of the preceding claims wherein (1), it is characterized in that, described recess (42) almost extends along the whole described transverse side (6) of described first permanent magnet (21).
6. according to rotor in any one of the preceding claims wherein (1), there is the second permanent magnet (22) surrounded at least in part by described ferromagnetic structure (3), wherein, described first permanent magnet (21) and described second permanent magnet (22) V-arrangement ground are arranged, and are provided with second zone line (82) of described ferromagnetic structure (3) by orientation between described first permanent magnet (21) and described second permanent magnet (22).
7. rotor according to claim 6 (1), is characterized in that, described second zone line (82) is configured to rectangle, and aspect ratio is greater than two.
8. according to rotor in any one of the preceding claims wherein (1), it is characterized in that, described recess (42) is configured to L shape.
9. according to rotor in any one of the preceding claims wherein (1), it is characterized in that, ferromagnetic described first zone line (81) is configured to wedge shape and/or triangle.
10. according to rotor in any one of the preceding claims wherein (1), it is characterized in that, described first permanent magnet (21) and/or described second permanent magnet (22) are configured to Halbach array.
11. according to rotor in any one of the preceding claims wherein (1), there is the ferromagnetic structure (3) of plum blossom-shaped, this ferromagnetic structure is formed by the ferromagnetic minor structure (30) of the column that multiple radial direction extends, wherein, the described minor structure (30) of column distributes equably by ground, orientation round the pivot center (100) of described rotor (1), has recess (42) respectively and have at least one other recess (43) respectively between the described minor structure (30) of two adjacent columns.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014214469.8A DE102014214469A1 (en) | 2014-07-24 | 2014-07-24 | Rotor for an electric machine |
| DE102014214469.8 | 2014-07-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105305683A true CN105305683A (en) | 2016-02-03 |
| CN105305683B CN105305683B (en) | 2020-05-29 |
Family
ID=55065435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510438418.5A Active CN105305683B (en) | 2014-07-24 | 2015-07-23 | Rotor for an electric machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105305683B (en) |
| DE (1) | DE102014214469A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463938A (en) * | 2020-04-14 | 2020-07-28 | 合肥工业大学 | Method for reducing magnetic flux leakage in rotor of low-speed high-torque permanent magnet synchronous motor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020115286A1 (en) * | 2020-06-09 | 2021-12-09 | Schaeffler Technologies AG & Co. KG | Electric motor with pockets for holding magnets |
| DE102021100867A1 (en) | 2021-01-18 | 2021-10-14 | Audi Aktiengesellschaft | Rotor for a synchronous machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2062486A1 (en) * | 1970-12-18 | 1972-07-06 | Siemens Ag | Permanently excited electrical machine |
| CN102510149A (en) * | 2011-11-22 | 2012-06-20 | 苏州大学 | Motor rotor |
| CN103339831A (en) * | 2011-02-03 | 2013-10-02 | 丰田自动车株式会社 | Rotor for electric machine |
| CN103715852A (en) * | 2012-09-28 | 2014-04-09 | 铃木株式会社 | IPM electric rotating machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090140593A1 (en) | 2007-11-30 | 2009-06-04 | Gm Global Technology Operations, Inc. | Methods and apparatus for a permanent magnet machine with added rotor slots |
| CN103026585B (en) | 2010-07-23 | 2014-07-09 | 丰田自动车株式会社 | Rotor and IPM motor |
-
2014
- 2014-07-24 DE DE102014214469.8A patent/DE102014214469A1/en active Pending
-
2015
- 2015-07-23 CN CN201510438418.5A patent/CN105305683B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2062486A1 (en) * | 1970-12-18 | 1972-07-06 | Siemens Ag | Permanently excited electrical machine |
| CN103339831A (en) * | 2011-02-03 | 2013-10-02 | 丰田自动车株式会社 | Rotor for electric machine |
| CN102510149A (en) * | 2011-11-22 | 2012-06-20 | 苏州大学 | Motor rotor |
| CN103715852A (en) * | 2012-09-28 | 2014-04-09 | 铃木株式会社 | IPM electric rotating machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463938A (en) * | 2020-04-14 | 2020-07-28 | 合肥工业大学 | Method for reducing magnetic flux leakage in rotor of low-speed high-torque permanent magnet synchronous motor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014214469A1 (en) | 2016-01-28 |
| CN105305683B (en) | 2020-05-29 |
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