CN102035281B - There is the motor of least cogging torque - Google Patents
There is the motor of least cogging torque Download PDFInfo
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- CN102035281B CN102035281B CN201010540502.5A CN201010540502A CN102035281B CN 102035281 B CN102035281 B CN 102035281B CN 201010540502 A CN201010540502 A CN 201010540502A CN 102035281 B CN102035281 B CN 102035281B
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- 238000003475 lamination Methods 0.000 claims abstract description 113
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 230000004907 flux Effects 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 20
- 230000005291 magnetic effect Effects 0.000 description 17
- 239000002184 metal Substances 0.000 description 5
- 238000004080 punching Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 206010067265 Heterotaxia Diseases 0.000 description 1
- 208000002128 Heterotaxy Syndrome Diseases 0.000 description 1
- 208000011934 Situs ambiguus Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 201000006869 visceral heterotaxy Diseases 0.000 description 1
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
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The present invention relates to the motor with least cogging torque.Parts for motor are concentrically disposed with around rotor axis, there is permanent magnet, this permanent magnet is arranged in the space of these parts, wherein this space has at least one for unit in fixed in this space is decided at the higher level but not officially announced of permanent magnet, and described permanent magnet have at least one corresponding and described fixed in unit matching effect fixed in engagement unit so that described permanent magnet in space by tangential fixed in.In addition the invention still further relates to the lamination of the parts for the present invention and permanent magnet and there is the motor of parts of the present invention.
Description
Technical field
The present invention relates to a kind of parts for motor, these parts are concentrically disposed with around rotor axis, and the present invention relates to a kind of motor with described parts.
Background technology
Motor e.g. motor, starter or electromotor.It is known that equip at least one permanent magnet for producing electromagnetic field to rotor or stator in such motor.The most such as in the servomotor of permanent magnet excitation, permanent magnet often loads the space of rotor.For realizing this point, the size in space have to be larger than the size of permanent magnet, and wherein, difference can be a few tenths of a mm due to manufacturing tolerance.
But the result that required big difference in size causes is, permanent magnet situs ambiguus in a groove.Permanent magnet may abut on the inner surface in space the most in the most adverse case, there is the gap of maximum between opposed side is at the inner surface and permanent magnet in space simultaneously.
But magnetic resistance and the power that thus acts on stator also change when air gap changes.This causes torque alternation cogging torque in other words (Rastmoment), makes the gyroscopic characteristics of motor by described torque alternation cogging torque in other words and hence in so that its control characteristic is deteriorated.
Open source literature US2007/0252469A1 discloses a kind of motor with lamination, is provided with the space for accommodating permanent magnet in its rotor.Space and permanent magnet upwardly extend at radial direction and the axle of rotor axis and are arranged such so that flux loss minimizes as far as possible.But can not position the most in the same manner in permanent magnet disclosed space there so that unsymmetry occurs in the rotor.
Also disclosing that the rotor of band permanent magnet in open source literature EP1309066A2, this permanent magnet is arranged in the space of rotor, but can not position in the same manner equally.
Although manufacturing tolerance can minimize by spending the biggest manufacturing process, but manufacturing cost is thus greatly enhanced.
Summary of the invention
The task of the present invention is to provide a kind of rotor for motor, cogging torque can be made to minimize by it, and therefore makes the gyroscopic characteristics optimization of this motor, and however remains able to manufacture at low cost.
This task is by the rotor solution being arranged concentrically around rotor axis for motor, this rotor is with the permanent magnet in the space being arranged on rotor, wherein this space has at least one for unit in fixed in this space is decided at the higher level but not officially announced of permanent magnet, and permanent magnet has the fixed middle engagement unit that at least one is corresponding, its with fixed in unit matching effect so that at least it back to rotor axis side by tangential fixed in.
The present invention be capable of tangential fixed in, say, that in fixed on the circumferencial direction of rotor, thus at least permanent magnet is precisely located in the region of rotor axis in space.Therefore, also at least avoiding permanent magnet to abut on space in one side in the region of rotor axis in the case of there is the tolerance caused especially by manufacture, this can cause occurring maximum gap in opposed side, and therefore causes the unsymmetry of maximum.
In a preferred embodiment, space preferably has the 3rd medial surface at it back to the side of rotor axis, 3rd medial surface limits this space, wherein permanent magnet has the 3rd side surface at it back to the side of rotor axis, 3rd side surface limits permanent magnet, and the 3rd side surface of permanent magnet not only by the 3rd medial surface in space but also is substantially divided half-and-half by the most imaginary plane.
Therefore the imaginary plane that permanent magnet is preferably launched by a line by rotor axis and transverse to rotor axis extension is at least substantially separated from centre back to the side of rotor axis at it, and the space arranged to accommodate permanent magnet is the most substantially separated in the region of permanent magnet by described plane from centre.Here state the deviation that " substantially " relates to being produced by the tolerance in manufacturing and below, thus the most substantially separately include from centre separating from centre.
Because the particularly a big chunk at the magnetic flux in three/part of rotor axis of permanent magnet in the part of rotor axis at rotor is lost as magnetic leakage flux, so it is less than to the contribution of effective flux with the magnetic flux of the side back to rotor axis.Therefore permanent magnet the side in the face of rotor axis of rotor tangential fixed in error and the side back to rotor axis tangential fixed in error to be compared to the impact of cogging torque mutually notable the least.
Therefore in the rotor of the present invention, bigger effective flux can be used compared with conventional rotor, and cogging torque reduces due to the improvement in determining.
Preferably space has the first medial surface limiting this space and the second medial surface limiting this space, and permanent magnet has the first side surface limiting this permanent magnet and the second side surface limiting this permanent magnet.Wherein the first medial surface and the first side surface are opposed, and the second medial surface and the second side surface are opposed, between the first medial surface and the first side surface, wherein constitute the first gap, and between the second medial surface and the second side surface, constitute the second gap, wherein, unit and corresponding fixed middle engagement unit mating reaction in fixed so that the first gap and the second gap are of substantially equal.
By making the first and second gaps equal in other words in tangential fixed in space of permanent magnet, retaining the gap of substantially the same size in this embodiment in the both sides of permanent magnet, the gap-ratio of this gap and the unilateral maximum arranged is divided half-and-half.
Here permanent magnet and space at least in the region of permanent magnet about imaginary plane preferably substantially specular.So, this permanent magnet is substantially provided in the centre in space about its tangential position.
The leakage making the air gap between permanent magnet and affiliated space in Ding minimizes.Therefore the dissymmetrical field causing cogging torque and torque ripple to improve caused by asymmetric gap is avoided.
In a preferred embodiment, fixed middle unit is arranged on the side back to rotor axis in space, is particularly provided on the 3rd medial surface, and fixed middle engagement unit is arranged on the side back to rotor axis of permanent magnet, is particularly provided on the 3rd side surface.Therefore carry out from the strong side affecting effective flux of permanent magnet in determining.
In preferably fixed, unit is configured to the shape specified, the rounding particularly specified, inclined-plane, trapezoidal or other shape.Such a shape can manufacture in manufacturing technology simply and at low cost, and need not other parts any.
According to tolerance position and tolerance width, the 3rd side surface of permanent magnet so abuts on the 3rd medial surface in space so that permanent magnet only part in space is centered.
In the most fixed, engagement unit substantially abuts on surely middle unit.Thus fixed middle engagement unit coordinates with fixed middle cell configuration and/or force transmitted is connected.
In a preferred embodiment, rotor has holding unit in the side in the face of rotor axis in space, and particularly convex shoulder, it is maintained at permanent magnet in space.Such convex shoulder is preferably integrally manufactured with rotor, and therefore can manufacture at low cost.
Preferred rotor is made up of at least one first lamination and at least one second lamination, and wherein the first lamination and the second lamination have the space for accommodating permanent magnet.By manufacturing rotor with lamination, it is possible to make eddy current minimize.Additionally, by from sheet metal punching lamination, it is possible to manufacture rotor at low cost.
Preferably first lamination and/or the second lamination have the fixed middle unit for surely middle permanent magnet.Thus enable that and there is not any connection between the side back to rotor axis of permanent magnet is on the first and/or second lamination in the north pole side and south pole side of permanent magnet.It is possible to reduce magnetic leakage flux.
Also, it is preferred that the first lamination and/or the second lamination have the holding unit for keeping permanent magnet.It can make to there is not any connection between the side in the face of rotor axis of permanent magnet is on the first and/or second lamination in the north pole side and south pole side of permanent magnet.It is possible to reduce magnetic leakage flux.
It is then preferred that the space of the first lamination and/or the second lamination extends on the region of holding unit.The most not only on the first lamination but also on the second lamination, between the north pole side and south pole side of permanent magnet, there is not any connection all equally.The holding unit of such as this embodiment is the particularly elastic component arranged between an armature spindle at rotor and permanent magnet, the most not only the first lamination and also the space of the second lamination all extend on the region of this component.But particularly preferably the first lamination or the second lamination has holding unit, particularly convex shoulder, and the most other lamination does not has holding unit and only there is the space that extends on the area.Space by extending decreases magnetic leakage flux in this embodiment.
In a preferred embodiment, the space of the first lamination and/or the second lamination is being respectively provided with guidance unit in the face of the side of rotor axis on the first medial surface and the second medial surface.It is then preferred that also ensured by the second guidance unit on the side of rotor axis faced by permanent magnet in the most fixed.Such as also by carrying out with the form formation guidance unit of interference fits or interference fit and the first and second side surfaces of permanent magnet in the face of the side of rotor axis in the most fixed.
The most described task is solved by the lamination of the rotor for the present invention, and wherein this lamination has the fixed middle unit of permanent magnet in surely and/or for keeping the holding unit of permanent magnet.Therefore rotor can be in an advantageous manner by the sheet metal manufacture of the multiple punching being joined together.At this by the lamination being configured differently is engaged with each other, it is possible to reduce magnetic leakage flux and expand the magnetic flux share as effective flux in other words.Such as some laminations can have surely in unit, holding unit or both have concurrently, and other laminations have in this region reduce magnetic leakage flux characteristic.Extend on the region of holding unit it is therefore further preferred to the space of some laminations is arranged at other lamination, thus space forms opening in this region.
The most described task is solved by the permanent magnet of the rotor for the present invention.The permanent magnet of the present invention has engagement unit in surely, in tangentially can being determined in the space of rotor by this fixed middle engagement unit permanent magnet.
The most described task solves by having the motor of the rotor of the present invention.The motor of the present invention has with at least one by the rotor of the permanent magnet in tangential fixed, in order to reduce the cogging torque in this motor and torque ripple.
Preferably this motor is made up of multiple stack of laminations.It is possible to constitute the motor of different length by different number of identical stack of laminations so that reduce warehouse cost.
This outer rotor and/or stack of laminations have end face, and the end face of rotor and/or the end face of stack of laminations have cover especially here.At least part of dead air space of this cover so that at least region being internally provided with holding unit in permanent magnet or also space is installed in the space of closing, and a part for permanent magnet or permanent magnet will not drop out from space.
By accommodate the space of permanent magnet have unit and permanent magnet in surely have with this in fixed unit matching effect fixed in engagement unit and the permanent magnet for the cogging torque and undulatory property that reduce motor that realizes tangential fixed in can also apply in the motor that permanent magnet is arranged in the stator.
Accompanying drawing explanation
Below according to accompanying drawing, the present invention is described.Accompanying drawing is only exemplary and is not limiting as total inventive concept.
Fig. 1 shows the top view by the rotor of the present invention of motor,
Fig. 2 shows the top view of another embodiment by the rotor of the present invention,
Fig. 3 shows the top view of another embodiment by the rotor of the present invention,
Fig. 4 shows the top view of another embodiment by the rotor of the present invention,
Fig. 5 shows the intercepting part of the rotor of Fig. 3,
Fig. 6 shows the first lamination of the rotor of Fig. 1 or Fig. 2,
Fig. 7 shows the perspective view by the rotor of the present invention of Fig. 1.
Detailed description of the invention
Fig. 1 shows the top view by the rotor 1 of the present invention of motor (the most not shown).Rotor 1 is concentrically disposed with around rotor axis 2.Rotor axis 2 is extended by armature spindle 22 longitudinally 5 (seeing Fig. 7).Rotor 1 is made up of lamination 121,122 (referring further to Fig. 7), that described lamination is preferably metal and particularly preferably use sheet metal punching, and is bonded into stack of laminations.Fig. 1 shows the second lamination 122, and it has particularly elastic holding lip 47 on the internal ring 14 of rotor 1, and the second lamination 122 can not be connected with armature spindle 22 with the relative rotation by this holding lip 47.First lamination 121 is arranged between the second lamination 122, illustrate only the holding unit 11 of the convex shoulder form of the first lamination 121 in Fig. 1, and it is used for keeping permanent magnet 3.First lamination 121 is respectively shown in Fig. 4 and Fig. 6.
Rotor 1 has multiple space 4, arranges permanent magnet 3 in it.Permanent magnet 3 is kept by holding unit 11.
Space 4 respectively has the first medial surface the 41, second medial surface 42 and the 3rd medial surface 43, and wherein the 3rd medial surface 43 is constituted by connecting jumper 13.First medial surface 41 is opposed to arrange with the first side surface 31 of permanent magnet 3, and the second side surface 32 of the second medial surface 42 and permanent magnet 3 is opposed to arrange, and the 3rd side surface 33 of the 3rd medial surface 43 and permanent magnet 3 is opposed to arrange (referring further to Fig. 5).
The side back to rotor axis 2 in space 4, they are respectively provided with in being fixed at it fixed middle unit 45 of the permanent magnet 3 arranged, and permanent magnet 3 is respectively provided with corresponding fixed middle engagement unit 35, wherein fixed middle unit 45 and fixed middle engagement unit 35 mating reaction.The side back to rotor axis 2 in space 4 or permanent magnet 3 arranges two fixed middle unit 45 and two fixed middle engagement unit 35 in this example.Here fixed middle unit 45 and fixed middle engagement unit 35 are the rounding at the edge between the first medial surface 41 and the 3rd medial surface 43, between the second medial surface 42 and the 3rd medial surface 43, between the first side surface 31 and the 3rd side surface 33 and between the second side surface 32 and the 3rd side surface 33 respectively.Here permanent magnet 3 fixed in engagement unit 35 abut in space 4 fixed on unit 45 and thus form fit and/or force transmitted connected (referring further to Fig. 5).
Unit 45 and fixed middle engagement unit 35 mating reaction in fixed so that permanent magnet 3 tangentially and the most along the circumferential direction 9 is centered in space 4.Permanent magnet 3 is substantially separated from centre by the imaginary plane 55 launched by rotor axis 2 and the line 51 that extends transverse to rotor axis 2, and space 4 is the most substantially separated in the region of permanent magnet 3 by this plane 55 from centre.
Showing out the width A of permanent magnet 3 in Fig. 1, this width is essentially divided into two halves a, a by imaginary plane 55.
Thus the second gap 462 (seeing Fig. 5) between the first gap 461 (seeing Fig. 5) and the second medial surface 42 and the second side surface 32 between the first medial surface 41 and the first side surface 31 is of substantially equal.
Because in fixed, unit 45 and fixed middle engagement unit 35 are separately positioned on the side back to rotor axis 2 of space 4 or permanent magnet 3, so the 3rd medial surface 43 and the 3rd side surface 33 are divided half-and-half by imaginary plane 55.Therefore very accurate in determining back to the side of rotor axis 2, compared with the side in the face of rotor axis 2, at this side magnetic flux, the biggest contribution is made for effective flux.Because the magnetic flux part do not made contributions effective flux does not affect for cogging torque and the torque ripple of motor, so by having significantly reduced cogging torque and undulatory property at the fixed middle unit 45 arranged back to rotor axis 2 side and fixed middle engagement unit 35.But the first particularly elastic guidance unit 411 is the most additionally set on the first medial surface 41 and the second particularly elastic guidance unit 421 is set on the second medial surface 42.
For manufacturing technology reasons, the most meaningfully, engagement unit 35 and/or the fixed middle unit 45 in space 4 in be also provided with the such as inclined-plane of permanent magnet 3 or the fixed of rounding form in the face of the side of rotor axis 2.Thus permanent magnet 3 can manufacture symmetrically and particularly simple and at low cost.
On the second lamination 122, space extends on region 49, arranges holding unit 11, thus space 4 is here formed in the upwardly extending opening in side of rotor axis 2 in this region on the first lamination 121.Thus make magnetic leakage flux minimum in this region 49.
Below for space 4 its in the region 49 of holding unit 11 be set use term " opening " unanimously.
In embodiment shown here, the second lamination 122 does not connect jumper 13 in the side back to rotor axis 2 in space 4.But it is consisted of the connection jumper 13 of the first lamination 121.
Here first and second medial surface 41,42 in space 4 are consisted of the holding jumper 48 of the second lamination 122 in the region of holding unit 11.
Fig. 1 shows north pole side N and south pole side S formed by permanent magnet.
The profile 23 of the rotor 1 shown in Fig. 1 and the rotor in other Fig. 2-7 1 is as sinusoidal magnetic pole manufacture.But the present invention can also apply on the rotor 1 of such as cylindrical profile (the most not shown) with other.
Fig. 2 shows the top view of another embodiment of the rotor 1 of the present invention.
Different from Fig. 1, the first and second laminations 121,122 replace having on the internal ring 14 of rotor 1 and keep lip 47 and interference fit 471 by means of the cylindricality of internal ring 14 can not be connected with armature spindle 22 with the relative rotation here.
Fig. 3 shows the top view of another embodiment of the rotor 1 of the present invention.
Different from the rounding of the rotor 1 of Fig. 1, in the rotor 1 of Fig. 3, fixed middle unit 45 and fixed middle engagement unit 35 are inclined-planes.Therefore permanent magnet 3 here has trapezoidal shape on its side 37 back to rotor axis 2.
In order to the comparison of the degree of depth 61 and degree of depth 71 of permanent magnet 3 that figure 3 illustrates the space 4 of the second lamination 122 is described.
The side 38 in the face of rotor axis 2 and the side 37 back to rotor axis 2 of permanent magnet 3 of permanent magnet 3 has been marked the most in figure 3 for explanation.
In addition figure 3 illustrates and there is gap 111, in order to reduce magnetic leakage flux between holding unit 11 and the internal ring 14 of the second lamination 122 of the first lamination 121.
Fig. 4 shows the top view of another embodiment of the rotor 1 of the present invention.
Fig. 4 shows the first lamination 121, it is different from the embodiment described above, both there is the fixed middle unit 45 in space 4, also there is the holding unit 11 for permanent magnet 3, also have by space 4 on the region 49 of holding unit 11 extend formed opening 49, also there are the first and second guidance units 411,412.In fixed, unit 45 and fixed middle engagement unit 35 are identical with the embodiment of Fig. 3 herein as inclined-plane composition, so that permanent magnet 3 also has trapezoidal shape here.This embodiment of first lamination 121 had both had connection jumper 13 in the side back to rotor axis 2 of permanent magnet 3, it may have keeping jumper 48, this holding jumper forms the first and second medial surface 41,42 in the region 49 of holding unit 11.
The rotor 1 of the present invention can be only made up of the first lamination 121 of the embodiment of Fig. 4.In addition the rotor 1 of the present invention can also be only made up of first lamination 121 of Fig. 1-3, the embodiment of 5-7, or is made up of Fig. 1-3, the first lamination 121 of the embodiment of 5-7 and the second lamination 122.First lamination 121 of the embodiment of the most such as Fig. 4 can combine to constitute the rotor 1 of the present invention with second lamination 122 of Fig. 1-3, the embodiment of 5-7.In addition the first and second laminations 121,122 of other the first and second laminations 121,122 or embodiments set forth herein can with one or more the 3rd and/or other lamination (the most not shown) constitute the rotor 1 of the present invention.
In addition first and/or second and/or other lamination 121,122 can be bonded into the stack of laminations 81,82 of a unique composition rotor 1.Or first and/or second and/or other lamination 121,122 can be bonded into multiple stack of laminations 81,82, they collectively form rotor 1.
Fig. 5 shows an intercepting part of the rotor 1 of Fig. 3.
In the region of the 3rd medial surface 43 and fixed middle unit 45, permanent magnet 3 form fit and/or force transmitted recline in the 3rd side surface 33 and fixed middle engagement unit 35.During thus the permanent magnet 3 location in space 4 is highly precisely ensured, and permanent magnet 3 is tangentially determined.
The difference that is required for permanent magnet 3 is inserted space 4 and that changed by manufacturing tolerance that is used between width 72 and the width 62 in space 4 of permanent magnet 3 causes the first gap 461 and the second gap 462 between the first medial surface 41 and the first side surface 31 and between the second medial surface 42 and the second side surface 32.Make it possible to permanent magnet 3 to be positioned substantially at the centre in space 4 in the most fixed.Therefore permanent magnet 3 and space 4 are substantially divided half-and-half by an imaginary plane 55 launched by rotor axis 2 and the line 51 that extends transverse to rotor axis 2.Therefore the first gap 461 is of substantially equal with the second gap 462.
Shown here the second lamination 122 has the first guidance unit 411 and the second guidance unit 421 at the first medial surface 41 and the second medial surface 42 in the region of rotor axis 2.Space 4 extends on the region 49 of holding unit 11, enabling see the holding unit 11 arranged on the first lamination 121.A segment distance 112 is formed so that at least on the first lamination 121, between in the face of the side 38 of rotor axis 2 in south pole side S and north pole side N (seeing Fig. 1) of permanent magnet 3, there is not connection between this external holding unit 11 and first medial surface 41.
Fig. 6 shows the first lamination 121 of the rotor 1 of Fig. 1,2 and 5.
This first lamination 121 is such as assembled by punching press, by baking or connected into by other method and at least one second lamination 122 stack of laminations of rotor 1.
This first lamination 121 has multiple space 4 for accommodating permanent magnet 3 (see Fig. 1,2).In space 4, unit 45 in surely is being set back to the side of rotor axis 2.For keeping permanent magnet 3 in space, it is provided with the holding unit 11 of convex shoulder form.
A distance 112 is set between holding unit 11 and the first medial surface 41 so that between in the face of the side of rotor axis 2 in south pole side S and north pole side N (seeing Fig. 1) of permanent magnet, there is not connection.Additionally, each on the first medial surface 41 and holding unit 11, the position 113 that attenuates is set.Only arranging connection jumper 13 back to the side of rotor axis 2, it constitutes the 3rd medial surface 43.These measures greatly reduce magnetic leakage flux.
Fig. 7 shows the perspective view of the rotor of the present invention of Fig. 1.
This rotor 1 is made up of the second lamination 122 of first lamination 121 and Fig. 1 of the Fig. 6 being bonded into stack of laminations.Lamination 121,122 here can not be relatively rotatably disposed on armature spindle 22 by holding lip 47 on internal ring 14.Armature spindle 22 extends on longitudinally 5 along rotor axis 2.
Stack of laminations 81,82 is made up of the lamination 121,122 of multiple coatings, and they substantially have identical thickness.If multiple identical laminations 121,122 set gradually, then it is shown without each lamination 121,122 separation point position to each other for simplification.
Multiple space 4 is set in rotor 1 for accommodating permanent magnet 3.Space 4 has rounding as surely middle unit 45, and permanent magnet 3 has rounding as surely middle engagement unit 35, they mating reactions.Thus permanent magnet 3 at least upwards that is is centered in space 4 inscribe back to the side of rotor axis 2 at it on the circumferencial direction 9 of rotor 1, gap between the first and second medial surface 41,42 (seeing Fig. 1) in space 4 and the first and second side surfaces 31,32 (seeing Fig. 1) of permanent magnet 3 required for making manufacturing technology 461,462 (see Fig. 1,5) minimizes, and the most also makes the cogging torque of motor minimize.
Then 3rd medial surface 43 in space 4 and the 3rd side surface 33 (seeing Fig. 1) of permanent magnet 3 are divided half-and-half substantially by the imaginary plane 55 upwardly extended in the side of rotor axis 2 and rotor axis 2 is within it arranged.
Lamination 121,122 can be completely by feeromagnetic metal or have the metal alloy of ferromagnetic characteristic and constitute.But also, it is preferred that connect jumper 13 and/or jumper 48 with non-conductor particularly plastics manufacture, in order to reduce magnetic leakage flux further.
In embodiment shown here, the first and second laminations 121,122 constitute each with the first end face 811 and the first stack of laminations 81 and the second stack of laminations 82 of the second end face 822.Figure 7 illustrates the first end face 811 and second end face 822 of the second stack of laminations 122 of the first stack of laminations 121.First stack of laminations 81 is joined on first end face (the most not shown) of the second stack of laminations 82 with its second end face (the most not shown), in order to two stack of laminations 81,82 constitute rotor 1.Thus the first end face 811 of the first stack of laminations 81 is the first end face 811 of rotor 1, and the second end face 822 of the second stack of laminations 82 is the second end face 822 of rotor 1.
For permanent magnet 3 is arranged in the space of closing in space 4, can arrange cover (the most not shown) on the end face 811,822 of rotor 1 and/or permanent magnet 3, it is at least in the region of permanent magnet 3 or space 4 is completely covered.Such a kind of cover is preferably made up of the 3rd lamination not having space.
This cover is preferably by plastics or another kind of nonferromagnetic material manufacture.
Claims (17)
1., for the rotor (1) of motor, this rotor is concentrically disposed with around rotor axis (2), and this rotor (1) is with the permanent magnet (3) in the space (4) being arranged on described rotor (1), it is characterised in that
nullDescribed space (4) has at least one for unit (45) in fixed in described space (4) are decided at the higher level but not officially announced of described permanent magnet (3)，And described permanent magnet (3) has at least one corresponding fixed middle engagement unit (35) with described fixed middle unit (45) mating reaction，Make described permanent magnet (3) at least in the side back to described rotor axis (2) of this permanent magnet is tangentially determined，Described rotor (1) has holding unit (11) in the side in the face of described rotor axis (2) of described space (4)，This holding unit is maintained at described permanent magnet (3) in described space (4)，Described space (4) has the first medial surface (41) limiting this space and the second medial surface (42) limiting this space，And described permanent magnet (3) has the first side surface (31) limiting this permanent magnet and the second side surface (32) limiting this permanent magnet，Wherein，Described first medial surface (41) is opposed with described first side surface (31)，And wherein，Described second medial surface (42) is opposed with described second side surface (32)，Wherein，Described space (4) constitutes the first gap (461) between described first medial surface (41) and described first side surface (31)，And between described second medial surface (42) and described second side surface (32), constitute the second gap (462)，Wherein，Described fixed middle unit (45) and described fixed middle engagement unit (35) mating reaction，Make described first gap (461) and described second gap (462) of substantially equal.
Rotor the most according to claim 1 (1), it is characterized in that, described permanent magnet (3) is at least substantially separated from centre in the side back to described rotor axis (2) of described permanent magnet by an imaginary plane (55) launched by described rotor axis (2) and the line (51) that extends transverse to described rotor axis (2), and described space (4) are the most substantially separated in the region of described permanent magnet (3) by described plane from centre.
Rotor the most according to claim 2 (1), it is characterized in that, described space (4) has the 3rd medial surface (43) in the side back to described rotor axis (2) in this space, 3rd medial surface limits this space (4), wherein, described permanent magnet (3) has the 3rd side surface (33) in the side back to rotor axis (2) of this permanent magnet, 3rd side surface limits described permanent magnet (3), it is characterized in that, 3rd side surface (33) of described permanent magnet (3) not only by the 3rd medial surface (43) of described space (4) but also is substantially divided half-and-half by described imaginary plane (55).
Rotor the most according to claim 2 (1), it is characterised in that described permanent magnet (3) and described space (4) are at least substantially mirror symmetric about described imaginary plane (55) in the region of described permanent magnet (3).
Rotor the most according to claim 3 (1), it is characterized in that, described fixed middle unit (45) is arranged on the side back to described rotor axis (2) in described space (4), and described fixed middle engagement unit (35) is arranged on the side back to described rotor axis (2) of described permanent magnet (3).
Rotor the most according to claim 5 (1), it is characterised in that described fixed in unit (45) be arranged on described 3rd medial surface (43), and described fixed in engagement unit (35) be arranged on described 3rd side surface (33).
7. according to the rotor (1) one of claims 1 to 3 Suo Shu, it is characterised in that described fixed in unit (45) be manufactured into the shape specified, described fixed in engagement unit (35) substantially abut in described fixed on unit.
8. according to the rotor (1) one of claims 1 to 3 Suo Shu, it is characterised in that described holding unit (11) is convex shoulder.
9. according to the rotor (1) one of claims 1 to 3 Suo Shu, it is characterized in that, described rotor (1) is made up of at least one first lamination (121) and at least one the second lamination (122), wherein, described first lamination (121) and described second lamination (122) have the space (4) for accommodating described permanent magnet (3).
Rotor the most according to claim 9 (1), it is characterised in that described first lamination (121) and/or described second lamination (122) have described in fixed permanent magnet (3) fixed in unit (45).
11. rotors according to claim 9 (1), it is characterised in that described first lamination (121) and/or described second lamination (122) have the holding unit (11) for keeping described permanent magnet (3).
12. rotors according to claim 9 (1), it is characterized in that, the space (4) of described first lamination (121) and/or described second lamination (122) is being respectively provided with the guidance unit (411,421) of elasticity on described first medial surface (41) and described second medial surface (42) in the face of the side of described rotor axis (2).
13. for the lamination (121 according to the rotor (1) one of the claims Suo Shu, 122), it is characterized in that, described lamination have described in fixed permanent magnet (3) fixed in unit (45) and/or be used for keeping the holding unit (11) of described permanent magnet (3).
14. for the permanent magnet (3) according to the rotor (1) one of claim 1-12 Suo Shu.
15. have the motor according to the rotor (1) one of claim 1-12 Suo Shu.
16. motors according to claim 15, it is characterised in that described motor is made up of multiple stack of laminations (81,82).
17. motors according to claim 16, it is characterised in that described rotor (1) and/or described stack of laminations (81,82) there is end face (811,822), and the end face (811 of described rotor (1), 822) and/or the end face (811,822) of described stack of laminations (81,82) has cover.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910045101 DE102009045101A1 (en) | 2009-09-29 | 2009-09-29 | Rotor for electric machine, is provided with permanent magnet concentrically arranged around rotor axis in recess of rotor |
| DE102009045101.3 | 2009-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102035281A CN102035281A (en) | 2011-04-27 |
| CN102035281B true CN102035281B (en) | 2016-08-03 |
Family
ID=43734407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010540502.5A Expired - Fee Related CN102035281B (en) | 2009-09-29 | 2010-09-28 | There is the motor of least cogging torque |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102035281B (en) |
| DE (1) | DE102009045101A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2976139B1 (en) * | 2011-05-31 | 2016-04-15 | Moteurs Leroy-Somer | ROTOR WITH PERMANENT MAGNETS AND ROTATING MACHINE COMPRISING SUCH A ROTOR. |
| EP2568578A3 (en) * | 2011-09-07 | 2017-12-06 | Samsung Electronics Co., Ltd. | Motor and washing machine having the same |
| DE102012218351A1 (en) * | 2011-10-11 | 2013-04-11 | Robert Bosch Gmbh | Clamping means for mounting a permanent magnet in a rotor or stator |
| JP5863410B2 (en) * | 2011-11-16 | 2016-02-16 | 信越化学工業株式会社 | Rotor and spoke type IPM permanent magnet rotating machine |
| FR2983657B1 (en) * | 2011-12-01 | 2014-09-05 | Valeo Equip Electr Moteur | ROTOR OF ROTATING ELECTRIC MACHINE AND ROTATING ELECTRIC MACHINE COMPRISING SUCH A ROTOR |
| FR2983659B1 (en) * | 2011-12-01 | 2014-08-29 | Valeo Equip Electr Moteur | ROTOR OF ROTATING ELECTRIC MACHINE AND ROTATING ELECTRIC MACHINE COMPRISING SUCH A ROTOR |
| DE102011122023A1 (en) | 2011-12-23 | 2013-06-27 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Robot sheet package of an electric motor |
| DE102012200882A1 (en) | 2012-01-23 | 2013-07-25 | Robert Bosch Gmbh | Blade for rotor of electric machine i.e. hand-held power tool such as Fret saw, has blade segment arranged adjacent to permanent magnets, where permanent magnets in terminal lug are fixed in tangential direction of set of recesses |
| DE102012218343A1 (en) * | 2012-10-09 | 2014-04-10 | Robert Bosch Gmbh | Clamping means for mechanically fixing magnets in a spoke rotor |
| DE102012219003A1 (en) * | 2012-10-18 | 2014-04-24 | Robert Bosch Gmbh | Rotor assembly for, e.g. rotary inner rotor permanent magnet machine, has pole piece held obliquely to radial direction extending web at rear end region while a web extends to magnetic yoke portion from radial center axis of pole piece |
| KR20150072450A (en) | 2012-11-30 | 2015-06-29 | 아세릭 에이. 에스 | A spoke permanent magnet rotor |
| EP2926436A2 (en) | 2012-11-30 | 2015-10-07 | Arçelik Anonim Sirketi | A spoke permanent magnet rotor |
| US10069357B2 (en) | 2012-11-30 | 2018-09-04 | Arcelik Anonim Sirketi | Spoke permanent magnet rotor |
| DE102013215812A1 (en) * | 2013-08-09 | 2015-03-05 | Bühler Motor GmbH | Electric machine |
| DE102013218490A1 (en) * | 2013-09-16 | 2015-03-19 | Mahle International Gmbh | Rotor for an electric machine |
| FR3018146A1 (en) * | 2014-03-03 | 2015-09-04 | Michelin & Cie | ROTOR FOR ROTATING ELECTRIC MACHINE COMPRISING MAGNET PRECONTRATING MEANS, AND ASSOCIATED MOUNTING METHOD |
| CN105391203A (en) * | 2014-09-03 | 2016-03-09 | 新安乃达驱动技术(上海)有限公司 | Brushless motor rotor structure employing built-in magnetic steel tangential magnetization |
| DE102015201493A1 (en) | 2015-01-29 | 2016-08-04 | Robert Bosch Gmbh | Magnetic field generating component for an electrical machine |
| US11418074B2 (en) * | 2018-07-13 | 2022-08-16 | Abb Schweiz Ag | Rotary electrical machine with spoked rotor |
| EP3657639A1 (en) * | 2018-11-26 | 2020-05-27 | LG Electronics Inc. | Motor |
| DE102018221061A1 (en) * | 2018-12-05 | 2020-06-10 | Robert Bosch Gmbh | Rotor of an electrical machine, and electrical machine having such a rotor |
| EP3706288A1 (en) * | 2019-03-06 | 2020-09-09 | Siemens Aktiengesellschaft | Sheet package for an electric machine |
| DE102022133366A1 (en) * | 2022-12-14 | 2024-06-20 | Valeo Eautomotive Germany Gmbh | Rotor core, rotor, electrical machine and vehicle |
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| JPH09205747A (en) * | 1996-01-25 | 1997-08-05 | Sanyo Denki Co Ltd | Permanent magnet rotor |
| JP2000156946A (en) * | 1998-11-19 | 2000-06-06 | Yaskawa Electric Corp | Permanent magnet field system-type rotor |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102009045101A1 (en) | 2011-04-14 |
| CN102035281A (en) | 2011-04-27 |
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