CN102035281A - Motor with least cogging torque - Google Patents
Motor with least cogging torque Download PDFInfo
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- CN102035281A CN102035281A CN2010105405025A CN201010540502A CN102035281A CN 102035281 A CN102035281 A CN 102035281A CN 2010105405025 A CN2010105405025 A CN 2010105405025A CN 201010540502 A CN201010540502 A CN 201010540502A CN 102035281 A CN102035281 A CN 102035281A
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- 238000003475 lamination Methods 0.000 claims description 112
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 6
- 230000004907 flux Effects 0.000 description 22
- 230000005291 magnetic effect Effects 0.000 description 17
- 238000012423 maintenance Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007789 sealing Methods 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
- 238000000576 coating method Methods 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
- 230000001105 regulatory effect Effects 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- 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 a motor with a least cogging torque. The components used for the motor are coaxially set around a motor axis. A permanent magnet which is provided in a clearance of the components is provided, wherein the clearance is provided with at least one centering unit which is used for centering the permanent magnet in the clearance. Furthermore the permanent magnet is provided with at least one centering matching unit which cooperates with the centering unit correspondingly so that the permanent magnet is centered tangentially in the clearance. Additionally the invention also relates to a laminate and the permanent magnet which are used for the components of the invention, and the motor with the components of the invention.
Description
Technical field
The present invention relates to a kind of parts that are used for motor, these parts are provided with one heart around rotor axis, and the present invention relates to a kind of motor with described parts.
Background technology
Motor for example is motor, starter or generator.Known in such motor, equip at least one permanent magnet for generating an electromagnetic field to rotor or stator.In this case for example in the servomotor of permanent magnet excitation permanent magnet often pack in the space of rotor.For realizing this point, the size in space must be greater than the size of permanent magnet, and wherein, difference is because manufacturing tolerance can be a few tenths of a mm.
Yet the result that needed big difference in size causes is the situs ambiguus of permanent magnet in groove.Therefore may abut on the inner surface in space at permanent magnet under the worst situation, between the inner surface in space and permanent magnet, have maximum gap in an opposed side simultaneously.
But magnetic resistance and the power that acts on thus on the stator also change when air gap changes.This causes torque alternation cogging torque (Rastmoment) in other words, by described torque alternation in other words cogging torque make the gyroscopic characteristics of motor and therefore make its regulating characteristics variation.
Open source literature US 2007/0252469 A1 discloses a kind of motor with lamination, is provided with the space that is used to hold permanent magnet in its rotor.Space and permanent magnet rotor axis radially and extend axially and so be provided with, make flux loss minimize as far as possible.Yet permanent magnet can not accurately be located in the disclosed there space in the same manner, makes asymmetry to occur in rotor.
Also disclose the rotor of band permanent magnet in open source literature EP 1 309 066 A2, this permanent magnet is arranged in the space of rotor, but can not locate in the same manner equally.
Though manufacturing tolerance can minimize by the manufacturing process that costs a lot of money, manufacturing cost greatly improves thus.
Summary of the invention
Task of the present invention is to provide a kind of rotor that is used for motor, by it cogging torque is minimized, and therefore makes the gyroscopic characteristics optimization of this motor, and however still can make at low cost.
This task solves by the rotor that is provided with one heart around rotor axis that is used for motor, this rotor has the permanent magnet in the space that is arranged on rotor, wherein this space has at least one and is used for permanent magnet unit in decided at the higher level but not officially announced fixed in this space, and permanent magnet has at least one corresponding fixed middle engagement unit, its with fixed in the unit matching effect, make at least it back to a side of rotor axis by tangential fixed in.
The present invention can realize tangential fixed in, that is to say in fixed on the circumferencial direction of rotor, thereby in the zone of rotor axis, in the space, accurately locating permanent magnet at least.Therefore, also avoiding permanent magnet to abut on the space one-sided in the zone of rotor axis at least under the situation that has the tolerance that is caused by manufacturing especially, this can cause maximum gap occurring in an opposed side, and therefore causes maximum asymmetry.
In preferred embodiment, the space preferably has the 3rd medial surface in its side back to rotor axis, the 3rd medial surface limits this space, wherein permanent magnet has the 3rd side surface in its side back to rotor axis, the 3rd side surface limits permanent magnet, and not only divide half-and-half basically with the 3rd medial surface in space but also with the 3rd side surface of permanent magnet on wherein imaginary plane.
Therefore permanent magnet is preferably separated from the centre in its side back to rotor axis by the rotor axis and the imaginary plane of launching transverse to the line that rotor axis extends at least basically by one, and the space that described plane will be provided with in order to hold permanent magnet separates from the centre in the zone of permanent magnet equally basically.Here and below statement " basically " relates to the deviation that produces by the tolerance in making, thereby for example separately comprises from the centre from the centre basically and separating.
Because rotor in the face of in the part of rotor axis particularly a big chunk at permanent magnet in the face of the magnetic flux in three of rotor axis/part lose as magnetic leakage flux, so it and to compare the contribution of effective flux back to the magnetic flux of a side of rotor axis significantly littler.Therefore permanent magnet is compared for the influence of cogging torque significantly littler with the error in a side of rotor axis tangential fixed at rotor in the face of the error in a side of rotor axis tangential fixed.
Therefore in rotor of the present invention, compare with the rotor of routine and can use bigger effective flux, and cogging torque since the improvement calmly reduce.
Preferred space has first medial surface that limits this space and second medial surface that limits this space, and permanent magnet has first side surface that limits this permanent magnet and second side surface that limits this permanent magnet.Wherein first medial surface and first side surface are opposed, and second medial surface and second side surface are opposed, wherein between first medial surface and first side surface, constitute first gap, and between second medial surface and second side surface, constitute second gap, wherein, unit and corresponding fixed middle engagement unit mating reaction make the gap of winning equal substantially with second gap in fixed.
By in permanent magnet tangential fixed in the space first and second gaps being equated, keep the gap of substantially the same size in this embodiment in the both sides of permanent magnet, divide half-and-half with the gap ratio of the maximum of one-sided setting in this gap.
Here permanent magnet and space at least in the zone of permanent magnet about the preferred mirror image symmetry basically in imaginary plane.Like this, this permanent magnet is arranged on the centre in space basically about its tangential position.
Make the leakage of the air gap between permanent magnet and the affiliated space minimize in fixed.Therefore avoided the dissymmetrical field that causes cogging torque and torque ripple raising that causes by asymmetric gap.
In preferred embodiment, fixed middle unit is arranged on the side back to rotor axis in space, is arranged on especially on the 3rd medial surface, and decides the side back to rotor axis that middle engagement unit is arranged on permanent magnet, is arranged on especially on the 3rd side surface.Therefore carry out from a strong side that influences effective flux of permanent magnet in fixed.
The unit constitutes the rounding, inclined-plane of the shape, particularly appointment of appointment, trapezoidal or other shape in preferred fixed.A kind of like this shape can be simply on manufacturing technology and is made at low cost, and without any need for other parts.
According to tolerance position and tolerance width, the 3rd side surface of permanent magnet so abuts on the 3rd medial surface in space, make permanent magnet in the space only part by in fixed.
Therefore preferred fixed middle engagement unit abuts on the middle surely unit basically.Engagement unit is connected with fixed middle cell configuration cooperation and/or force transmitted in fixed thus.
In preferred embodiment, rotor the space in the face of a side of rotor axis has holding unit, convex shoulder particularly, it remains on permanent magnet in the space.Such convex shoulder is preferably integrally manufactured with rotor, and therefore can make at low cost.
Preferred rotor is made of at least one first lamination and at least one second lamination, and wherein first lamination and second lamination have the space that is used to hold permanent magnet.By making rotor, eddy current is minimized with lamination.In addition, by from sheet metal punching out lamination, can make rotor at low cost.
Preferred first lamination and/or second lamination have the fixed middle unit that is used for deciding permanent magnet.Can make thus and between the north pole side of permanent magnet and south pole side, not have any connection back to a side of rotor axis on first and/or second lamination at permanent magnet.Can reduce magnetic leakage flux thus.
Same preferred first lamination and/or second lamination have the holding unit that is used to keep permanent magnet.It can make and the north pole side of permanent magnet and south pole side between not have any connection on first and/or second lamination at permanent magnet in the face of a side of rotor axis.Can reduce magnetic leakage flux thus.
Extend on the zone of holding unit in the space of preferred in addition first lamination and/or second lamination.Here preferred not only on first lamination but also all between the north pole side of permanent magnet and south pole side, do not have any connection equally on second lamination.For example the holding unit of this execution mode is a particularly flexible member that is provided with between the armature spindle of rotor and permanent magnet, and all extend on the zone of this member in wherein not only first lamination but also space second lamination.Yet preferred especially first lamination or second lamination has holding unit, particularly convex shoulder, and corresponding other lamination does not have holding unit and only have the space of extending on this zone.In this execution mode, also reduced magnetic leakage flux by the space of extending.
In preferred embodiment, the space of first lamination and/or second lamination has guidance unit in the side in the face of rotor axis respectively on first medial surface and second medial surface.Also pass through the assurance of second guidance unit on the side of rotor axis in preferably tangentially fixed in addition facing of permanent magnet.In tangential fixed for example also by carrying out with first and second side surfaces that the form of interference fits or interference fit forms guidance unit and permanent magnet in the face of a side of rotor axis.
Described in addition task solves by the lamination that is used for rotor of the present invention, unit and/or be used to keep the holding unit of permanent magnet in permanent magnet fixed during wherein this lamination has surely.Therefore rotor can be in an advantageous manner by the sheet metal manufacturing of a plurality of punching out together that are engaged with each other., can reduce magnetic leakage flux and enlarge magnetic flux share in other words by the lamination of structure differently is engaged with each other at this as effective flux.Unit during for example some laminations can have surely, holding unit or both have concurrently, and other laminations have the characteristic that reduces magnetic leakage flux in this zone.Therefore, also the space of more preferred laminations is provided with at other lamination on the zone of holding unit and extends, thereby the space forms opening in this zone.
Described in addition task solves by the permanent magnet that is used for rotor of the present invention.Permanent magnet of the present invention has middle surely engagement unit, in can tangentially being decided in the space of rotor by this fixed middle engagement unit permanent magnet.
Described in addition task solves by the motor with rotor of the present invention.Motor of the present invention has with at least one by the rotor of the permanent magnet in tangential fixed, so that reduce cogging torque and torque ripple in this motor.
Preferred this motor is made of a plurality of stack of laminations.Identical stack of laminations that thus can enough different numbers constitutes the motor of different length, makes to reduce warehouse cost.
This external rotor and/or stack of laminations have end face, and the end face of the end face of rotor and/or stack of laminations has cover especially here.This covers partially enclosed at least space, makes at least permanent magnet or also have the zone that is provided with holding unit within it in space to be installed in the space of sealing, and the part of permanent magnet or permanent magnet can not drop out from the space.
In having surely by the space that holds permanent magnet unit and permanent magnet have with should be fixed in the tangential fixed of permanent magnet that engagement unit realizes in unit matching effect fixed is used for reducing the cogging torque of motor and fluctuation also can in permanent magnet is arranged on motor in the stator, use.
Description of drawings
The present invention is described below with reference to the accompanying drawings.Accompanying drawing only is exemplary and does not limit total inventive concept.
Fig. 1 shows the vertical view by rotor of the present invention of motor,
Fig. 2 shows the vertical view by another execution mode of rotor of the present invention,
Fig. 3 shows the vertical view by another execution mode of rotor of the present invention,
Fig. 4 shows the vertical view by another execution mode of rotor of the present invention,
Fig. 5 shows the intercepting part of the rotor of Fig. 3,
Fig. 6 shows first lamination of the rotor of Fig. 1 or Fig. 2,
Fig. 7 shows the perspective view by rotor of the present invention of Fig. 1.
Embodiment
Fig. 1 shows the vertical view by rotor 1 of the present invention of motor (not shown) here.Rotor 1 is provided with one heart around rotor axis 2.Rotor axis 2 extends by armature spindle 22 at vertical 5 (referring to Fig. 7).Rotor 1 is made of lamination 121,122 (also referring to Fig. 7), described lamination preferably metal and especially preferably use the sheet metal punching out, and be bonded into stack of laminations.Fig. 1 shows second lamination 122, and it has particularly flexible maintenance lip 47, the second laminations 122 and can not be connected with the relative rotation with armature spindle 22 by this maintenance lip 47 on the interior ring 14 of rotor 1.First lamination 121 is arranged between second lamination 122, only shows the holding unit 11 of the convex shoulder form of first lamination 121 among Fig. 1, and it is used to keep permanent magnet 3.First lamination 121 is respectively shown in Fig. 4 and Fig. 6.
Rotor 1 has a plurality of spaces 4, and permanent magnet 3 is set in it.Permanent magnet 3 keeps by holding unit 11.
4 the side in the space back to rotor axis 2, they have the fixed middle unit 45 that is used for the fixed permanent magnet 3 that is provided with within it respectively, and permanent magnet 3 has corresponding fixed middle engagement unit 35 respectively, wherein fixed middle unit 45 and fixed middle engagement unit 35 mating reactions.In this example the side back to rotor axis 2 of space 4 or permanent magnet 3 be provided with two fixed in unit 45 and two fixed middle engagement unit 35.Here in fixed unit 45 and fixed in engagement unit 35 be respectively between first medial surface 41 and the 3rd medial surface 43, between second medial surface 42 and the 3rd medial surface 43, between first side surface 31 and the 3rd side surface 33 and the rounding at the edge between second side surface 32 and the 3rd side surface 33.Here engagement unit 35 abuts in space 4 fixed on the unit 45 and form fit and/or force transmitted are connected (also referring to Fig. 5) with it thus in permanent magnet 3 fixed.
In fixed unit 45 and fixed in engagement unit 35 mating reactions, make permanent magnet 3 in space 4 tangentially and therefore along the circumferential direction 9 by in fixed.Permanent magnet 3 is by being separated from the centre basically by the rotor axis 2 and the imaginary plane 55 of launching transverse to the line 51 that rotor axis 2 extends, and this plane 55 separates space 4 in the zone of permanent magnet 3 equally basically from the centre.
The width A that goes out permanent magnet 3 has been shown among Fig. 1, and this width is divided into two halves a, a basically by imaginary plane 55.
First gap 461 (referring to Fig. 5) between first medial surface 41 and first side surface 31 equates substantially with second gap 462 (referring to Fig. 5) between second medial surface 42 and second side surface 32 thus.
Because 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 in fixed, 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 fixed back to a side of rotor axis 2, compare with a side in the face of rotor axis 2, make significantly bigger contribution at this side magnetic flux for effective flux.Because the magnetic flux of effective flux not being made contributions part is for the cogging torque and the not influence of torque ripple of motor, so by greatly having reduced cogging torque and fluctuation in unit 45 and fixed middle engagement unit 35 in rotor axis 2 one side settings fixed.But preferably additionally particularly flexible first guidance unit 411 is being set on first medial surface 41 and particularly flexible second guidance unit 421 is being set on second medial surface 42.
For the reason of manufacturing technology, often meaningfully, unit 45 in engagement unit 35 and/or space 4 fixed in for example inclined-plane that permanent magnet 3 also is set in the face of a side of rotor axis 2 or rounding form fixed.Permanent magnet 3 can be made symmetrically and very simply and at low cost thus.
Extend on zone 49 in space on second lamination 122, in this zone, on first lamination 121, holding unit 11 is set, thereby space 4 is formed in the upwardly extending opening in the side of rotor axis 2 here.Make magnetic leakage flux minimum in this zone 49 thus.
Regard to the zone 49 that holding unit 11 is set in its of space 4 down and use term " opening " unanimously.
In the execution mode shown here, 4 the side back to rotor axis 2 does not connect jumper 13 to second lamination 122 in the space.But it is by connection jumper 13 formations of first lamination 121.
Here first and second medial surfaces 41,42 in space 4 maintenance jumper 48 by second lamination 122 in the zone of holding unit 11 constitutes.
Fig. 1 shows north pole side N and the south pole side S that forms by permanent magnet.
The profile 23 of rotor 1 shown in Fig. 1 and the rotor in other Fig. 2-7 1 is as sinusoidal magnetic pole manufacturing.But the present invention also can use on the rotor 1 with other for example cylindrical profile (not shown here).
Fig. 2 shows the vertical view of another execution mode of rotor 1 of the present invention.
Different with Fig. 1, first and second laminations 121,122 replace having on the interior ring 14 of rotor 1 and keep lip 47 and can not be connected with armature spindle 22 with the relative rotation by means of the interference fit 471 of the cylindricality of interior ring 14 here.
Fig. 3 shows the vertical view of another execution mode of rotor 1 of the present invention.
Different with the rounding of the rotor 1 of Fig. 1, in the rotor 1 of Fig. 3, fixed in unit 45 and fixed in engagement unit 35 are inclined-planes.Therefore permanent magnet 3 has trapezoidal shape at it here on a side 37 of rotor axis 2.
For the comparison of the degree of depth 61 that the space 4 that figure 3 illustrates second lamination 122 is described with the degree of depth 71 of permanent magnet 3.
A side 38 of facing rotor axis 2 of permanent magnet 3 and the side 37 back to rotor axis 2 of permanent magnet 3 have been marked for explanation among this external Fig. 3.
Figure 3 illustrates in addition between the interior ring 14 of the holding unit 11 of first lamination 121 and second lamination 122 and have gap 111, in order to reduce magnetic leakage flux.
Fig. 4 shows the vertical view of another execution mode of rotor 1 of the present invention.
Fig. 4 shows first lamination 121, it is different from the embodiment described above, the fixed middle unit 45 that had both had space 4, also has the holding unit 11 that is used for permanent magnet 3, also have by the opening that extend to form 49 of space 4 on the zone 49 of holding unit 11, also have first and second guidance units 411,412.Unit 45 and fixed middle engagement unit 35 are identical here as the inclined-plane formation with the execution mode of Fig. 3 in fixed, so that permanent magnet 3 also has trapezoidal shape here.This execution mode of first lamination 121 both had the jumper 13 of connection in the side back to rotor axis 2 of permanent magnet 3, also have the jumper 48 of maintenance, this keeps jumper to form first and second medial surfaces 41,42 in the zone 49 of holding unit 11.
Rotor 1 of the present invention can be only be made of first lamination 121 of the execution mode of Fig. 4.Rotor 1 of the present invention in addition also can be only be made of first lamination 121 of the execution mode of Fig. 1-3,5-7, and perhaps first lamination 121 and second lamination 122 by the execution mode of Fig. 1-3,5-7 constitutes.In addition for example first lamination 121 of the execution mode of Fig. 4 can with second lamination, 122 combinations of the execution mode of Fig. 1-3,5-7 to constitute rotor 1 of the present invention.In addition first and second laminations 121,122 of other first and second laminations 121,122 or the execution mode that proposes here can with one or more the 3rd and/or other lamination (not shown here) constitute 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 formation rotor 1.Perhaps first and/or second and/or other lamination 121,122 can be bonded into a plurality of stack of laminations 81,82, they constitute rotor 1 jointly.
Fig. 5 shows an intercepting part of the rotor 1 of Fig. 3.
The 3rd medial surface 43 and fixed in the zone of unit 45 permanent magnet 3 form fit and/or force transmitted recline on the 3rd side surface 33 and the fixed middle engagement unit 35.The location of permanent magnet 3 in space 4 very accurately guaranteed thus, and permanent magnet 3 by tangential fixed in.
Being used between the width 72 of permanent magnet 3 and the width 62 in space 4 inserts space 4 differences needed and that change by manufacturing tolerance to permanent magnet 3 and causing first gap 461 and second gap 462 between first medial surface 41 and first side surface 31 and between second medial surface 42 and second side surface 32.Make it possible to permanent magnet 3 is positioned substantially at the centre in space 4 in tangentially fixed.Therefore divide half-and-half by rotor axis 2 and transverse to the imaginary plane 55 that the line 51 that rotor axis 2 extends launches basically by one in permanent magnet 3 and space 4.Therefore first gap 461 equates substantially with second gap 462.
Here second lamination 122 that illustrates has first guidance unit 411 and second guidance unit 421 first medial surface 41 and second medial surface 42 in the face of in the zone of rotor axis 2.Extend on the zone 49 of holding unit 11 in space 4, makes it possible to see the holding unit 11 that is provided with on first lamination 121.Form a segment distance 112 between this external holding unit 11 and first medial surface 41, make at least between the south pole side S of permanent magnet 3 and north pole side N (referring to Fig. 1), not have connection in the face of a side 38 of rotor axis 2 on first lamination 121.
Fig. 6 shows first lamination 121 of Fig. 1,2 and 5 rotor 1.
This first lamination 121 for example by punching press assembling, by baking or connect into the stack of laminations of rotor 1 by other method and at least one second lamination 122.
This first lamination 121 has a plurality of spaces 4 and is used to hold permanent magnet 3 (referring to Fig. 1,2).In space 4 in the side back to rotor axis 2 is provided with surely unit 45.For in the space, keeping permanent magnet 3, be provided with the holding unit 11 of convex shoulder form.
Between the holding unit 11 and first medial surface 41, a distance 112 is set, makes between the south pole side S of permanent magnet and north pole side N (referring to Fig. 1), do not have connection in the face of a side of rotor axis 2.In addition, each is provided with the position 113 that attenuates on first medial surface 41 and holding unit 11.Only in the side back to rotor axis 2 connection jumper 13 is set, it constitutes the 3rd medial surface 43.These measures have greatly reduced magnetic leakage flux.
Fig. 7 shows the perspective view of the rotor of the present invention of Fig. 1.
This rotor 1 is made of first lamination 121 of the Fig. 6 that is bonded into stack of laminations and second lamination 122 of Fig. 1.Lamination 121,122 here can not be arranged on the armature spindle 22 by maintenance lip 47 on interior ring 14 with the relative rotation.Armature spindle 22 extends on vertical 5 along rotor axis 2.
Stack of laminations 81,82 is made of the lamination 121,122 of a plurality of coatings, and they have identical thickness basically.If a plurality of identical laminations 121,122 set gradually, then each lamination 121,122 separation point position to each other is not shown for simplification.
A plurality of spaces 4 are set in rotor 1 are used to hold permanent magnet 3.Space 4 has rounding as unit 45 in fixed, and permanent magnet 3 has rounding as engagement unit 35 in fixed, their mating reactions.Thus permanent magnet 3 at least its back to a side of rotor axis 2 space 4 inscribes upwards that is on the circumferencial direction 9 at rotor 1 by in fixed, make manufacturing technology needed in space 4 first and second medial surfaces 41,42 (referring to Fig. 1) and the gap 461,462 (referring to Fig. 1,5) between first and second side surfaces 31,32 (referring to Fig. 1) of permanent magnet 3 minimize, and therefore the cogging torque of motor is minimized.
The 3rd side surface 33 (referring to Fig. 1) of the 3rd medial surface 43 in space 4 and permanent magnet 3 is divided half-and-half substantially by the imaginary plane 55 of extending on the direction of rotor axis 2 and rotor axis 2 is provided with within it then.
Lamination 121,122 can be fully be made of feeromagnetic metal or metal alloy with ferromagnetic characteristic.Yet equally preferably with particularly plastics manufacturing connection jumper 13 and/or jumper 48 of non-conductor, so that further reduce magnetic leakage flux.
In the execution mode shown here, first and second laminations 121,122 constitute first stack of laminations 81 and second stack of laminations 82 that respectively has first end face 811 and second end face 822.Figure 7 illustrates first end face 811 of first stack of laminations 121 and second end face 822 of second stack of laminations 122.First stack of laminations 81 joins on first end face (not shown here) of second stack of laminations 82 with its second end face (not shown here), so that two stack of laminations 81,82 constitute rotor 1.First end face 811 of first stack of laminations 81 is first end faces 811 of rotor 1 thus, and second end face 822 of second stack of laminations 82 is second end faces 822 of rotor 1.
For permanent magnet 3 is arranged in space 4 in the space of sealing, can on the end face 811,822 of rotor 1 and/or permanent magnet 3, cover (not shown) be set here, it is at least in the zone of permanent magnet 3 or cover space 4 fully.A kind of cover preferably like this is made of the 3rd lamination that does not have the space.
This cover is preferably by plastics or another kind of nonferromagnetic material manufacturing.
Claims (17)
1. the rotor (1) that is used for motor, this rotor is provided with one heart around rotor axis (2), and this rotor (1) has the permanent magnet (3) in the space (4) that is arranged on described rotor (1), it is characterized in that,
Described space (4) has at least one and is used for described permanent magnet (3) unit (45) in described space (4) decided at the higher level but not officially announced fixed, and described permanent magnet (3) has at least one corresponding and described fixed middle engagement unit (35) of deciding middle unit (45) mating reaction, makes described permanent magnet (3) at least in the side back to described rotor axis (2) of this permanent magnet is tangentially decided.
2. rotor according to claim 1 (1), it is characterized in that, described permanent magnet (3) is separated from the centre in the side back to described rotor axis (2) of described permanent magnet by the described rotor axis (2) and the imaginary plane (55) of launching transverse to the line (51) that described rotor axis (2) extends at least basically by one, and described plane separates described space (4) in the zone of described permanent magnet (3) equally basically from the centre.
3. according to one of aforesaid right requirement described rotor (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, the 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, the 3rd side surface limits described permanent magnet (3), it is characterized in that described imaginary plane (55) is not only divided half-and-half basically with the 3rd medial surface (43) of described space (4) but also with the 3rd side surface (33) of described permanent magnet (3).
4. according to one of aforesaid right requirement described rotor (1), it is characterized in that, described space (4) has first medial surface (41) that limits this space and second medial surface (42) that limits this space, and described permanent magnet (3) has first side surface (31) that limits this permanent magnet and second side surface (32) that limits 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 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 second gap (462), wherein, described fixed middle unit (45) and described fixed middle engagement unit (35) mating reaction make described first gap (461) equal substantially with described second gap (462).
5. one of require described rotor (1) according to aforesaid right, it is characterized in that, described permanent magnet (3) and described space (4) at least in described permanent magnet (3) regional about described imaginary plane (55) mirror image symmetry basically.
6. according to one of aforesaid right requirement described rotor (1), it is characterized in that, described fixed in unit (45) be arranged on described space (4) on a side of described rotor axis (2), be arranged on especially on described the 3rd medial surface (43), and described fixed in engagement unit (35) be arranged on described permanent magnet (3) on a side of described rotor axis (2), be arranged on especially on described the 3rd side surface (33).
7. one of require described rotor (1) according to aforesaid right, it is characterized in that, described fixed in unit (45) manufacture the shape of appointment, described fixed in engagement unit (35) abut in basically described fixed on the unit.
8. according to one of aforesaid right requirement described rotor (1), it is characterized in that, described rotor (1) has holding unit (11) in the side in the face of described rotor axis (2) of described space (4), convex shoulder particularly, this holding unit remains on described permanent magnet (3) in the described space (4).
9. according to one of aforesaid right requirement described rotor (1), it is characterized in that, described rotor (1) is made of at least one first lamination (121) and at least one second lamination (122), wherein, described first lamination (121) and described second lamination (122) have the space (4) that is used to hold described permanent magnet (3).
10. one of require described rotor (1) according to aforesaid right, it is characterized in that, described first lamination (121) and/or described second lamination (122) have be used for fixed described in permanent magnet (3) decide unit (45).
11., it is characterized in that described first lamination (121) and/or described second lamination (122) have the holding unit (11) that is used to keep described permanent magnet (3) according to one of aforesaid right requirement described rotor (1).
12. according to one of aforesaid right requirement described rotor (1), it is characterized in that, the space (4) of described first lamination (121) and/or described second lamination (122) is gone up rubber-like guidance unit (411,421) respectively in the side in the face of described rotor axis (2) at described first medial surface (41) and described second medial surface (42).
13. be used for lamination (121 according to the described rotor of one of aforesaid right requirement (1), 122), it is characterized in that, described lamination have be used for fixed described in the deciding unit (45) and/or be used to keep the holding unit (11) of described permanent magnet (3) of permanent magnet (3).
14. be used for permanent magnet (3) according to the described rotor of one of claim 1-12 (1).
15. have motor according to the described rotor of one of claim 1-12 (1).
16. motor according to claim 15 is characterized in that, described motor is made of a plurality of stack of laminations (81,82).
17., it is characterized in that described rotor (1) and/or described stack of laminations (81 according to the described motor of one of claim 15-16,82) have 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) have 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 true CN102035281A (en) | 2011-04-27 |
| CN102035281B 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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| CN102810919A (en) * | 2011-05-31 | 2012-12-05 | 利莱森玛电机公司 | Permanent-magnet rotor and rotating machine comprising such a rotor |
| CN103051081A (en) * | 2011-10-11 | 2013-04-17 | 罗伯特·博世有限公司 | Clamping mechanism for fixing permanent magnets in rotor or stator |
| CN104685765A (en) * | 2012-10-09 | 2015-06-03 | 罗伯特·博世有限公司 | Clamping means for mechanically fastening magnets in a spoked rotor |
| CN104871403A (en) * | 2012-11-30 | 2015-08-26 | 阿塞里克股份有限公司 | A spoke permanent magnet rotor |
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| CN111224485A (en) * | 2018-11-26 | 2020-06-02 | Lg电子株式会社 | Motor with a stator having a stator core |
| CN113544940A (en) * | 2019-03-06 | 2021-10-22 | 西门子股份公司 | Laminated core for an electric machine |
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| EP2568578A3 (en) * | 2011-09-07 | 2017-12-06 | Samsung Electronics Co., Ltd. | Motor and washing machine having the same |
| 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 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2001186698A (en) * | 1999-12-24 | 2001-07-06 | Honda Motor Co Ltd | Permanent-magnet motor |
| JP2001346345A (en) * | 2000-05-31 | 2001-12-14 | Sodick Co Ltd | Rotor of synchronous machine |
| CN1408139A (en) * | 1999-12-03 | 2003-04-02 | 埃科艾尔公司 | Hybrid brushless electric machine |
| JP2005137037A (en) * | 2003-10-28 | 2005-05-26 | Aichi Electric Co Ltd | Permanent magnet type synchronous motor |
| CN2874900Y (en) * | 2006-03-17 | 2007-02-28 | 上海海事大学 | Rotor of high performance permanent magnetic synchronous motor |
| US20070252469A1 (en) * | 2006-04-19 | 2007-11-01 | Asmo Co., Ltd. | Embedded magnet type rotating electric machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2062486A1 (en) * | 1970-12-18 | 1972-07-06 | Siemens Ag | Permanently excited electrical machine |
| JP2574007B2 (en) * | 1988-08-02 | 1997-01-22 | ファナック株式会社 | Synchronous motor rotor |
| US5829120A (en) * | 1993-02-15 | 1998-11-03 | Fanuc, Ltd. | Method for manufacturing a rotor for synchronous motor |
| DE19723302A1 (en) * | 1997-06-04 | 1998-12-10 | Sen Rainer Born | Permanent magnet system with reluctance support for rotors of electrical machines |
| DE10153750A1 (en) | 2001-10-31 | 2003-05-22 | Siemens Ag | Rotor for PM synchronous machine |
-
2009
- 2009-09-29 DE DE200910045101 patent/DE102009045101A1/en not_active Withdrawn
-
2010
- 2010-09-28 CN CN201010540502.5A patent/CN102035281B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN1408139A (en) * | 1999-12-03 | 2003-04-02 | 埃科艾尔公司 | Hybrid brushless electric machine |
| JP2001186698A (en) * | 1999-12-24 | 2001-07-06 | Honda Motor Co Ltd | Permanent-magnet motor |
| JP2001346345A (en) * | 2000-05-31 | 2001-12-14 | Sodick Co Ltd | Rotor of synchronous machine |
| JP2005137037A (en) * | 2003-10-28 | 2005-05-26 | Aichi Electric Co Ltd | Permanent magnet type synchronous motor |
| CN2874900Y (en) * | 2006-03-17 | 2007-02-28 | 上海海事大学 | Rotor of high performance permanent magnetic synchronous motor |
| US20070252469A1 (en) * | 2006-04-19 | 2007-11-01 | Asmo Co., Ltd. | Embedded magnet type rotating electric machine |
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| CN102810919A (en) * | 2011-05-31 | 2012-12-05 | 利莱森玛电机公司 | Permanent-magnet rotor and rotating machine comprising such a rotor |
| CN103051081A (en) * | 2011-10-11 | 2013-04-17 | 罗伯特·博世有限公司 | Clamping mechanism for fixing permanent magnets in rotor or stator |
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| CN104871403A (en) * | 2012-11-30 | 2015-08-26 | 阿塞里克股份有限公司 | A spoke permanent magnet rotor |
| CN104871404A (en) * | 2012-11-30 | 2015-08-26 | 阿塞里克股份有限公司 | A spoke permanent magnet rotor |
| US10199892B2 (en) | 2012-11-30 | 2019-02-05 | Arcelik Anonim Sirketi | Spoke permanent magnet rotor |
| US10069357B2 (en) | 2012-11-30 | 2018-09-04 | Arcelik Anonim Sirketi | Spoke permanent magnet rotor |
| US10177616B2 (en) | 2012-11-30 | 2019-01-08 | Arcelik Anonim Sirketi | Spoke permanent magnet rotor |
| CN105474513A (en) * | 2013-08-09 | 2016-04-06 | 标立电机有限公司 | Electrical machine comprising permanent magnet rotor |
| CN105474513B (en) * | 2013-08-09 | 2018-08-28 | 标立电机有限公司 | Motor with PM rotor |
| 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 |
| CN111224485A (en) * | 2018-11-26 | 2020-06-02 | Lg电子株式会社 | Motor with a stator having a stator core |
| US11258321B2 (en) | 2018-11-26 | 2022-02-22 | Lg Electronics Inc. | Motor having rotor frame with magnet fixing jig holes |
| US11264851B2 (en) | 2018-11-26 | 2022-03-01 | Lg Electronics Inc. | Motor having alternately arranged rotor core segments and permanent magnets |
| US11349360B2 (en) | 2018-11-26 | 2022-05-31 | Lg Electronics Inc. | Motor |
| US11355979B2 (en) | 2018-11-26 | 2022-06-07 | Lg Electronics Inc. | Motor |
| CN113544940A (en) * | 2019-03-06 | 2021-10-22 | 西门子股份公司 | Laminated core for an electric machine |
| CN113544940B (en) * | 2019-03-06 | 2024-03-15 | 西门子股份公司 | Laminated core for an electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102035281B (en) | 2016-08-03 |
| DE102009045101A1 (en) | 2011-04-14 |
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