CN1659766A - Rotary electric motor having a plurality of shifted stator poles and/or rotor poles - Google Patents
Rotary electric motor having a plurality of shifted stator poles and/or rotor poles Download PDFInfo
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- CN1659766A CN1659766A CN038128217A CN03812821A CN1659766A CN 1659766 A CN1659766 A CN 1659766A CN 038128217 A CN038128217 A CN 038128217A CN 03812821 A CN03812821 A CN 03812821A CN 1659766 A CN1659766 A CN 1659766A
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- permanent magnet
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- electric motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
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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
- H02K1/12—Stationary parts of the magnetic circuit
Abstract
A rotary electric motor has a stator with a plurality of axially spaced sets of corresponding stator (3,6) and rotor elements (22,23,24). The stator of each set is an annular ring with poles circumferentially positioned about an axis of rotation. The rotor of each set has a plurality of permanent magnets disposed circumferentially along an annular air gap opposite the stator poles. The permanent magnets of adjacent rotor element sets and/or the poles of adjacent stator sets are offset from each other in the axial direction to cancel the effects of cogging torque produce by each of the sets.
Description
Related application
The theme that the application comprises relates to the common unsettled U. S. application No.09/571 that people such as Pyntikov submitted on May 16th, 2000,174, the common unsettled U. S. application No.09/826 that people such as Maslov submitted to April 5 calendar year 2001,423, the common unsettled U. S. application No.09/826 that people such as Maslov submitted to April 5 calendar year 2001,422, the U. S. application No.09/966 that people such as Maslov submitted to October 1 calendar year 2001,101, the common unsettled U. S. application No.10/067 that people such as Maslov submitted on February 7th, 2002,305 and the common unsettled U. S. application No.10/160 that submits on June 4th, 2002 of people such as Maslov, 257, all above-mentioned application and the application are transferred the possession of jointly.The disclosure of these applications is incorporated into herein and is classified reference as.
Invention field
The present invention relates to rotary electromotor, more specifically, relate to the permanent magnet motor that comprises a plurality of axially spaced rotors and stator poles, axially spaced rotor magnet or stator magnet are shifted mutually from axially aligned position.
Background
The people's such as Maslov of Ren Dinging relevant common unsettled U.S. Patent application No.09/826 above, 423 confirm and at the needs to improved motor, this motor is suitable for simplifying to be made and can have effectively and operating characteristic flexibly.For example, in vehicle drive environment, in demand is that high moment of torsion fan-out capability is kept simultaneously in acquisition operation stably under minimal power consumption in wide velocity interval.This vehicular electric machine driver should advantageously provide the contact easily to multiple structure member, is used for replacing these parts with the inconvenience of minimum.The relevant common unsettled U. S. application of above confirming has been described the formation as the electromagnet core part that is configured in the saturating magnetic structure of isolation in the annular ring.Than prior art embodiments, by such configuration can the concentration magnetic flux so that favourable effect to be provided.
As mentioned described in the people's such as Maslov of Que Rening the application, the isolation of electromagnet core part allows in magnetic core concentration magnetic flux independently, and has minimum flux loss or make and influence minimum to what harmful mutual inductance of other electromagnet members was disturbed.By extremely obtaining operating advantage to the groups of electromagnets that is configured to isolate with single.To extremely to the energizing of winding the time, independent poles pair and the magnetic path isolation of other utmost point groups have been eliminated the influence to the magnetic flux mutual inductance of adjacent set at switch.In group, there is not the extra utmost point to avoid any this influence in this group.Described further benefit come from use three-dimensional surface to electric machine structure, such as following such structural configuration, wherein axially aligned stator poles and axially aligned rotor magnet provide the flux density distribution of high concentration in the effective air gap of machine.Than the traditional motor with identical air-gap diameter, this configuration provides the utmost point that more has identical independent effective air gap surface area and/or bigger total effective air gap surface area.
Advantage except the flux concentration that obtains by configuration mentioned above, neodymium-iron-boron (NdFeB) magnetic material that proposes can produce than the bigger magnetic density of before using in brushless electric machine of other permanent magnetic materials recently, has therefore increased the moment of torsion fan-out capability.Using high density to produce permanent magnet in comprising the motor of a large amount of utmost points has proposed improving the concern of the unwanted influence of being introduced by start and stop torque.Start and stop torque is to produce by the magnetic attraction that the rotor that permanent magnet is installed and those are not between the stator poles of selectivity magnetized state.This suction makes rotor magnet move to the equilbrium position relative with stator poles, uses so that the magnetic resistance minimum between it.When by driving rotor when rotation to energizing of stator, partly interact and the amplitude and the direction periodic variation of the start and stop torque that produces by magnet and the electromagnet of not energizing, opposite with the start and stop torque that produces by the stationary part of energizing.Under the situation that does not have compensation, start and stop torque can change the direction of rotor rotation in unexpected mode.If start and stop torque has very big amplitude, then it becomes the obstacle and the mechanical vibration source of rotation, and this target to precise speed control and quiet run is harmful to.
As the explanation that start and stop torque is set up, consider such as common pending application No.09/826 disclosed motor in 422.The disclosure of this application is incorporated into herein.Fig. 1 shows the exemplary diagram of rotor and stator component.Rotor part 20 is the annular ring structures with permanent magnet 21, and permanent magnet 21 separates each other and distributes along cylindrical back plate 25 equably basically.This permanent magnet is the rotor pole that alternately changes magnetic polarity along the inner periphery of annular ring.Rotor ring is around stator component 30, and rotor and stator component are separated by annular radial air gap.Stator 30 comprises a plurality of consistent electromagnet core parts of constructing that have, and it distributes equably along air gap.Each core segment comprises the magnet structure 36 that is generally U-shaped, and it has formed two utmost points that have in the face of the surface 32 of air gap.Extremely right leg is twined by winding 38, is formed on extremely to the single winding on the link part although core segment can be built as to hold.Each stator electromagnet core structure is discrete, and is that magnetic is isolated with adjacent stator core element.Stator component 36 is fixed on the non-magnetic supporting construction, forms the annular ring configuration thus.Dispersing from the spuious mutual flux amount influence of adjacent stator pole groups eliminated in this configuration.
Fig. 2 is the partial plan layout of two adjacent stator core elements 36, and it has the pole-face 32 that is labeled as A～D, and is relevant with the rotor magnet that is labeled as 0～5 during motor operation.In the cycle that rotor moves from left to right, at three moment (t
1～t
3) show the position of rotor magnet at (A)～(C).At moment t
1, by energizing to the right winding of A-B stator poles according to forming the strong South Pole at the A place and forming the electric current that flows on the direction of the strong arctic at the B place.The winding that the C-D stator poles is right is not energized.Show the position of rotor at (A).North magnet 1 and southern magnet 2 are overlapping with stator poles A.South magnet 2 and northern magnet 3 are overlapping with stator poles B.At this constantly, magnet 3 near with the equitant position of utmost point C.South magnet 4 is aimed at utmost point C basically, and northern magnet 5 is aimed at utmost point D basically.At this constantly, produced Motor torque by the repulsive force between the attraction between the attraction between South Pole A and the arctic magnet 1, arctic B and the South Pole magnet 2 and arctic B and the arctic magnet 3.Utmost point C and D have the magnetization by the faint separately north that attraction caused of magnet 4 and 5 and south.This attraction of tending to keep minimum magnetic resistance is opposite with the motor-driven moment of torsion.
At moment t
2, rotor moves to the position shown in (B).Close extremely energizing of A-B winding being converted into.The winding that C-D is extremely right is not energized. Magnet 1 and 2 is aimed at utmost point A and B respectively basically.North magnet 3 and southern magnet 4 are overlapping with utmost point C.South magnet 4 and northern magnet 5 are overlapping with utmost point D.Utmost point A and B have the magnetization of faint Nan Hebei respectively.Stator poles C and D are subjected to the influence of north and southern rotor magnet.Utmost point C is in the flux path between arctic magnet 3 and the South Pole magnet 4.Utmost point D is in the flux path between South Pole magnet 4 and the arctic magnet 5.Therefore the start and stop torque of being set up is opposite with the motor-driven moment of torsion, and along with rotor magnet from the direct aligned position of the stator poles of not energizing to the mobile of part aligned position and the change amplitude.
At moment t
3, rotor moves to the position shown in (C).Put upside down A-B extremely to the energizing of winding, caused the strong arctic at utmost point A place and the strong South Pole at B place.The winding that C-D is extremely right is not energized.North magnet 1 and southern magnet 2 are overlapping with stator poles B.South magnet 0 and northern magnet 1 are overlapping with stator poles A.This constantly southern magnet 2 near with the equitant position of utmost point C.North magnet 3 is aimed at utmost point C basically, and southern magnet 4 is aimed at utmost point D basically.
As indicated above, the mode that opposite start and stop torque changes with respect to the related angle position when being rotated influences Motor torque.When rotor magnet will be crossed over air-gap surface to stator poles, this start and stop torque was the most remarkable at the transition point place.During near the parallel edge of rectangle stator poles, the unexpected variation of start and stop torque has taken place in the permanent magnet surfaces leading edge of rectangle normally.The high-energy-density permanent magnet material (it has introduced big magnetic density in the air gap of the adjacent domain of rotor permanent magnet) of use such as neodymium-iron-boron (NdFeB) magnetic material has increased this to a great extent makes the unwanted vibration remarkable influence that becomes.Motor with a large amount of magnetic pole of the stator and rotor magnetic pole such as axially aligned stator poles row and rotor magnet rows, can produce even bigger start and stop torque influence.In having the motor of unitary stator core, in the scope that changes, produced start and stop torque in an identical manner.
Multiple technologies have been used to the influence of start and stop torque is reduced to minimum.These technology trials reduce the speed with respect to the magnetic resistance change rate of rotor-position, reduce the magnetic flux in the motor, perhaps move to make that extremely the start and stop torque that is produced by independent poles trends towards disappearing mutually each other in single stator core.Can use electronic method control to occur in the intensity of the electromagnetic interaction between permanent magnet and the electromagnet surface.The defective of this method is that the defective of this method is that they have related to complicated control algolithm, and the trend of reduction motor overall performance is realized and had to this algorithm and Electric Machine Control algorithm simultaneously.The advantage that the minimizing of magnetic density has been sacrificed by newer permanent magnet material and the flux concentration technology of the common pending application of above confirming obtains.The position of the mobile utmost point has caused size, position and the restriction of number of poles purpose in traditional single stator core structures, and its obstruction provides the configuration of Optimizing operation.
Additive method relates to the structure of revising motor by the shape that changes stator poles.The stator poles of the prior art of being made by stacked lamination is not easy to be suitable for being modified traditionally.Available lamination machining technology is subject to the ability that traditional graph (particularly 3-D graphic) is reshaped.It is too complicated with expensive, to such an extent as to infeasible being used for this lamination is revised on a large scale.
Therefore need below existing,, and can not damage the valid function and the control ability of motor, the feasibility and the application of saving cost are provided simultaneously promptly in that particularly those have effectively to pause in the motor of high flux density amplitude and concentration degree and change compensation.
Common pending application (Attorney Docket No.57357-023) needs at this, and its geometric configuration by stator pole surface or rotor magnet surface being shaped so that stator pole surface geometric configuration and rotor magnet surface is about being mutual deflection each other.The effect of this deflection configuration is, when permanent magnet crosses its rotation route, suppressed the rate of change of the start and stop torque that produced by the interaction between the utmost point of the rotor magnet and the stator electromagnet of not energizing.Be suitable for forming the core material such as soft magnetizing mediums of multiple given shape by use, make that the ability of the selectivity shaping stator utmost point is feasible.For example, core material can be made by Fe, SiFe, SiFeCo, the SiFeP dusty material of soft magnetization degree, and every kind of material has unique power loss, magnetic permeability and saturation.Can form these materials the most at the beginning with any required three-dimensional configuration, avoid the needs of the established hard laminated material of machining thus.
Making the influence of start and stop torque reduce to that minimum continues under the situation that does not influence the moment of torsion fan-out capability devastatingly is important target.
Summary of the invention
The present invention has satisfied these needs at least in part by offset the influence of the start and stop torque that produces in a plurality of axially spaced rotors and stator component group.By using soft magnetic-permeable material to be used to form stator core structures, obtained further advantage.Can form the core geometry and the core size of stator component, and not need to form lamination, and therefore can make it optimize the magnetic potential gradient of between the coupling utmost point of rotor permanent magnet and stator electromagnet, setting up with relevant tolerances.
The invention has the advantages that extremely can being offset mutually in the axial direction of the axially oriented stator core that each is discrete in order under the situation of the relation of the position between the stator poles that does not limit on the circumferencial direction, eliminated the influence of start and stop torque.
Another advantage of the present invention is, at circumferencial direction with the rotor permanent magnet of arranging axially skew mutually in the axial direction, in order under the situation that does not limit permanent magnet sum on the circumferencial direction or their position, eliminates the influence of start and stop torque.
Architectural feature of the present invention is embodied in the motor that comprises rotor and stator, and each rotor and stator are placed in the annular ring configuration, and is spaced from each other by the radial air gap of annular.Preferably, stator comprises a plurality of discrete whole electromagnet core parts, and it is around the coaxial arrangement of rotating shaft.Each core segment comprises that two or more integral body are linked at the utmost point together.On this link part, form winding,, in adjacent stator poles, set up magnetic pole with opposite polarity in order to when energizing by electric current.
The stator poles partial fixing and is distributed in the stator ring ring on non-ferromagnetic supporting construction, does not have ferromagnetic contact each other.The core segment that has the winding of not energizing like this will not have the magnetic flux that produces therein, and this magnetic flux is by the winding of the core segment of another ferromagnetic isolation being energized and producing.Yet, the electromagnet core of not energizing part near and by in the face of the air gap part of stator poles the time, it will be subjected to the influence of the magnetic flux that produced by moving of rotor permanent magnet.
According to an aspect of the present invention, each core segment comprises a plurality of by the partly whole utmost points that connect of link, the common and rotating shaft parallel of this link part.Preferably, the electromagnet core part is formed by the powdery metal material.The utmost point of each stator core part is skew mutually in the axial direction.All stator poles all have common surface geometric configuration in air gap.Rotor comprises a plurality of permanent magnets that have in the face of the surface of air gap, and this surface has common geometric configuration.Each permanent magnet is a magnetic dipole, and it has a magnetic polarity in the surface in the face of air gap, and has opposite magnetic polarity in the surface that deviates from air gap, has formed polar orientation thus on the direction perpendicular to air gap.This permanent magnet has the possibility common surface geometric configuration identical with stator poles, and aims in the axial row of along the circumferential direction settling along air gap.Each rotor permanent magnet its separately ring and axial row in have the opposite magnetic polarity of magnetic polarity of the permanent magnet that is adjacent.
The effect that makes the Ghandler motion position in the axial direction is significantly to have eliminated the start and stop torque that produces in each transformation between rotor magnet and stator poles, because be offset in the transformation at axial adjacent elements place.Can keep the maximum magnetic linkage between overlapping rotor magnet and the stator poles, use so that Motor torque ability maximum.Geometric configuration by making stator poles extraly can compensate start and stop torque further about rotating shaft deflection and shaping.The further description of the advantage that is shaped for deflection and the utmost point can be with reference to common pending application (Attorney Docket No.57357-023).
By the permanent magnet in the adjacent axially spaced ring is offset mutually, can realize variation scheme of the present invention.The stator poles of each stator core can be axially aligned, because by means of the rotor magnet position, will offset in the axially element place magnet of adjacency and the transformation between the stator poles.As further variation scheme, stator core part extremely can have common surface geometric configuration at the air gap place, and permanent magnet surfaces can have the common geometric configuration that is different from the stator pole surface geometric configuration.
By detailed description hereinafter, for those skilled in the art, the additional advantage of the present invention easy to understand that will become is wherein carried out the best mode that the present invention considered by explanation simply, only illustrates and described the preferred embodiments of the present invention.As will be recognized, the present invention that can have other with different embodiment, and do not departing under the situation of the present invention, its several places details can be made amendment aspect remarkable different.Therefore, accompanying drawing and description should be considered to illustrative, and nonrestrictive.
The accompanying drawing summary
In the diagram of accompanying drawing, the present invention is as example, but not is described as restriction, and represents similar element at the similar reference number of accompanying drawing, wherein:
Fig. 1 shows such as common pending application No.09/826, the rotor of disclosed motor and the graphical representation of exemplary of stator component in 422.
Fig. 2 is the partial plan layout of Fig. 1 element, and it has illustrated in the motor operation process three relative positions of stator pole surface and rotor surface constantly.
Fig. 3 is the three-dimensional exploded diagrammatic sketch such as motor disclosed in the common pending application (Attorney Docket No.57357-019).
Fig. 4 is the stator poles of all motors as shown in Figure 3 and the partial plan layout of permanent magnet surfaces.
Fig. 5 is according to the stator poles of motor of the present invention and the partial plan layout of permanent magnet surfaces.
Fig. 6 is the stator poles of motor according to a further aspect in the invention and the partial plan layout of permanent magnet surfaces.
Fig. 7 is according to the present invention and the stator poles of the motor of the variation scheme of Fig. 6 configuration and the partial plan layout of permanent magnet surfaces.
Detailed Description Of The Invention
Notion of the present invention is applicable to the motor with two or more axially spaced rotors and stator component group.In order to understand the structural correlation between rotor and stator component, Fig. 3 shows the three-dimensional exploded diagrammatic sketch such as motor disclosed in the common pending application (Attorney Docket No.57357-019).Motor 15 comprises the stator structure 30 of the permanent magnet rotor 20 and the annular of annular, and they separate by radial air gap.The stator core subelement 36 of a plurality of ferromagnetic isolation of being made by magnetic-permeable material is supported by supporting construction 50, and it keeps the ferromagnetic isolation of this part.This part 36 is the overall structures that formed by magnetic-permeable material, and it has the extremely surface 32 in the face of air gap.The pole-face of each core segment has different surface areas, as shown in the figure, or has identical surface configuration.Each stator core element 36 is the electromagnets that comprise winding 38, and this winding 38 is formed on the core material.Put upside down the putting upside down of magnetic polarity that the energized current direction causes each utmost point in known manner.Rotor comprises: permanent magnet part 21, and it has 3 axially spaced rotor magnet rings 22～24 that distribute along the air gap circumferencial direction; With support iron hoop 25, permanent magnet is installed thereon.Stator support structure 50 can be fixed to fixed axis, and rotor is installed in the housing, its by suitable axle bush and bearing as axle journal support to this axle.
Fig. 4 is the stator poles of all motors as shown in Figure 3 and the partial plan layout of permanent magnet surfaces, and its rotor is static.The upper part of figure shows four adjacent stator components 36, its each include 3 stator poles with surface 32.The lower part of figure shows 3 axially spaced rotor rings with magnet 21.Stator of along the circumferential direction settling around rotating shaft in the practical structures and rotor elements are placed on the horizontal plane to be arranged, crosses the spatial relationship of air gap so that they to be described, represents with the level interval between them.Rotating shaft is positioned at vertical direction.In practical structures, top stator poles row is crossed air gap and is aimed at following rotor magnet rows, and the row of middle stator poles is crossed air gap and aimed at the rotor magnet rows of centre, and following stator poles row is crossed air gap and aimed at top rotor magnet rows.When motor is in the operation, in the stator poles row of each aligning and rotor magnet rows with above discussed and produced start and stop torque in mode illustrated in fig. 2.When the adjacent rotor magnet in the magnet ring that all stator poles axially align mutually and each separates in each part axially aligned mutually, corresponding stator poles row produced identical start and stop torque variation with rotor magnet rows and may be superimposed on together.
Fig. 5 is according to the stator poles of motor of the present invention and the partial plan layout of permanent magnet surfaces.The supporting construction of element shown in being used for can be to shown in Fig. 3 similar.Stationary part 36 is aimed on the direction of rotating shaft, and along the circumferential direction settles around rotating shaft.All stator poles in each part axially align mutually.In this diagram, all stator pole surface have identical geometric configuration and size.Axially spaced rotor ring 22～24 is also along the circumferential direction settled around rotating shaft.As shown in the figure, all magnet surface have identical geometric configuration and size.Yet the magnet in the adjacent ring is skew mutually in the axial direction.
In the motor operation process, rotor has partly been crossed over horizontal path with respect to fixed stator.The rotor magnet of corresponding rotor ring/stator pole groups and the aligning transition point between the stator poles appear on along the circumferential direction the position and are different from the time of each other respective rotor and stator component group.Therefore, relevant with the skew of rotor magnet, each group has produced the start and stop torque that the similar time changes, and this each start and stop torque is displacement mutually each other.Start and stop torque cancels each other out on variable degree, and the influence of Zu He start and stop torque can be minimum thus.The size of the stator poles of each core segment and/or the size of rotor magnet do not need identical, but can change, for example shown in the configuration of Fig. 3.Consider the feature of size, the degree that can suitably select to be offset is used to obtain optimized effect.
Fig. 6 is the stator poles of motor according to a further aspect in the invention and the partial plan layout of permanent magnet surfaces.The supporting construction of element shown in being used for can be to shown in Fig. 3 similar.Rotor 21 comprises three groups of axially spaced magnet rings 22～24.Magnet in the adjacent ring has essentially identical surface size, and axially aligns mutually.Stationary part 36 is aimed on the direction of rotating shaft, and along the circumferential direction settles around rotating shaft.Yet the stator poles in each part is skew mutually in the axial direction.Deviation post with the relevant pole-face of the axially aligned base part of this part can form by soft magnetizing mediums, such as the powder metal materials that can fashion into required form.
In the configuration as shown in Figure 5, in the motor operation process, rotor is crossed over the horizontal path about the fixed stator part.The rotor magnet of corresponding rotor ring/stator pole groups and the aligning transition point between the stator poles appear on along the circumferential direction the position and are different from the time of transition point in each other respective rotor and the stator component group.Relevant with the skew of stator poles, but each group has produced start and stop torque that the similar time changes that be shifted mutually.The size of the stator poles of each core segment can differ from one another, and the size of rotor magnet also is like this.The degree that can suitably select to be offset is used for the start and stop torque that combination is eliminated on optimization ground.
Fig. 7 is according to the present invention and the stator poles of the motor of the variation scheme of Fig. 6 configuration and the partial plan layout of permanent magnet surfaces.Rotor magnet in the adjacent ring 22～24 has essentially identical surface size, and axially aligns mutually.The stator poles of each stationary part 36 is aimed at mutually and is partly aimed at the core base supports.Yet stationary part 36 is a deflection about rotating shaft.The displacement of leaving axle that is produced by the particular offset angle of stationary part makes the rotor magnet of corresponding rotor ring/stator pole groups and the aligning transition point between the stator poles, and the transition point other corresponding rotors and the stator component group is shifted from each, as the configuration of Fig. 6.
In operation, variation scheme of the present invention as described previously, 3 rotors and stator component group have essentially identical surface configuration, make each group produce the similar time and change start and stop torque.When the skew of the utmost point that depends on the stationary part with skewed relationship was shifted the start and stop torque of independently group generation each other, start and stop torque cancelled each other out to a certain extent.In addition, the skewed relationship by between stator poles and the corresponding rotor magnet has reduced the start and stop torque that is produced by each group.The leading edge of magnet cross air gap near stator poles will be not can be immediately and the whole imbricate of stator poles because make this edge not have the relation that is parallel to each other by the angle excursion of stator poles.Therefore, cross air gap near with the overlapping relation of stator poles the time when rotor magnet, than configuration previously discussed, the variation in the start and stop torque relaxes more.Reduced the start and stop torque vibration thus.For the more detailed explanation of the advantageous effect of deflection configuration, can be with reference to common pending application 10/160,257.The embodiment of Fig. 7 provides the advantage of not only being shifted of rotor and stator component but also skewed relationship.Aim in the axial direction and the variation scheme of rotor magnet relative stator Ghandler motion position and deflection by the stator poles of each part wherein, obtained similar effect.
In this disclosure, only illustrate and described the preferred embodiments of the present invention and several its multifarious example.Should be appreciated that as the scope of notion of the present invention of statement herein in, the present invention can be used in different other combinations and environment, and can change and revise.For example, can use stator core single rather than segmentation, spaced apart from each other in the axial direction to realize each layout that illustrates in the accompanying drawing, obtain favourable result.
Although the particular geometric configuration of stator core element has been described, will be appreciated that the notion of the present invention of this paper has contained numerous variation scheme of these configurations, and uses powder metal technology can form Any shape in fact.Therefore, can make specific core configuration be suitable for required magnetic flux distributions.
Although description of the invention shows the stator that is centered on by rotor, notion of the present invention is equally applicable to the motor that rotor is centered on by stator.
Claims (18)
1. rotary permanent magnet electric motor comprises:
Stator, it comprises the electromagnet core part of a plurality of discrete ferromagnetic isolation, this electromagnet core partly around the coaxial arrangement of rotating shaft in order to form the cylindric track ring of annular, each core segment comprises a plurality of by the general utmost point that upwardly extending link part integrally connects in rotating shaft side; With
Cylindric ring-shaped rotor, it is concentric and separate by cylindric annulus gap and this stator with stator, described rotor comprises a plurality of permanent magnets, it has in the face of the surface of air gap and has formed the ring of discrete magnet axially spaced, that settle in a circumferential direction along air gap, and the number of described ring quantitatively equals the number of stator poles in the stator core part;
The wherein utmost point of each stator core part skew mutually in the axial direction.
2. the rotary permanent magnet electric motor of claim 1, wherein a plurality of rotor permanent magnets are aimed in the axial row of along the circumferential direction settling along air gap.
3. the rotary permanent magnet electric motor of claim 2, wherein the utmost point and the rotor permanent magnet of stator core part have common geometric configuration on their air gap surface.
4. the rotary permanent magnet electric motor of claim 1, wherein stator core is fixed on the non-magnetic supporting construction, and is distributed in the track ring, does not have ferromagnetic contact each other.
5. the rotary permanent magnet electric motor of claim 2 on wherein winding is formed on and links partly, in order to when energizing by electric current, is set up the magnetic pole with opposite polarity in adjacent stator poles.
6. the rotary permanent magnet electric motor of claim 5, wherein each rotor permanent magnet its separately ring and axial row in have the opposite magnetic polarity of magnetic polarity of the permanent magnet that is adjacent.
7. the rotary permanent magnet electric motor of claim 6, wherein each permanent magnet is a magnetic dipole, it has a kind of magnetic polarity in the surface in the face of air gap, and has opposite magnetic polarity in the surface that deviates from air gap, has formed the magnetic polarity direction thus on the direction perpendicular to air gap.
8. the rotary permanent magnet electric motor of claim 1, wherein the electromagnet core part is formed by the powdery metal material.
9. the rotary permanent magnet electric motor of claim 2, wherein the utmost point of stator core part has common surface geometric configuration at the air gap place, and permanent magnet surfaces has the common geometric configuration that is different from the stator pole surface geometric configuration.
10. the rotary permanent magnet electric motor of claim 1, wherein each stator poles can have the surface geometric configuration about the rotating shaft deflection.
11. a rotary permanent magnet electric motor comprises:
Stator, it comprises the electromagnet core part of a plurality of discrete ferromagnetic isolation, this electromagnet core partly around the coaxial arrangement of rotating shaft in order to form the cylindric track ring of annular, each core segment comprises a plurality of by the general utmost point that upwardly extending link part integrally connects in rotating shaft side; With
Cylindric ring-shaped rotor, it is concentric and separate by cylindric annulus gap and this stator with stator, described rotor comprises a plurality of permanent magnets, it has in the face of the surface of air gap and has formed the ring of discrete magnet axially spaced, that settle in a circumferential direction along air gap, and the number of described ring quantitatively equals the number of stator poles in the stator core part;
The wherein skew mutually in the axial direction of the permanent magnet in the adjacent ring.
12. the rotary permanent magnet electric motor of claim 11, wherein the stator poles of each core segment is aimed in the axial direction.
13. the rotary permanent magnet electric motor of claim 11, wherein the electromagnet core part is formed by the powdery metal material.
14. the rotary permanent magnet electric motor of claim 13, wherein the utmost point of stator core part has common surface geometric configuration at the air gap place, and permanent magnet surfaces has the common geometric configuration that is different from the stator pole surface geometric configuration.
15. a rotary permanent magnet electric motor comprises a plurality of axially spaced corresponding stators and rotor elements group, wherein
Each group comprises: the track ring of annular, and it has the utmost point of settling in a circumferential direction around rotating shaft; With columned ring-shaped rotor, it has a plurality of permanent magnets relative with stator poles, that settle in a circumferential direction along annulus gap; And
The utmost point of adjacent stators group is skew mutually in the axial direction.
16. the rotary permanent magnet electric motor of claim 15, wherein the permanent magnet of adjacent rotor element group is aimed in the axial direction.
17. a rotary permanent magnet electric motor comprises a plurality of axially spaced corresponding stators and rotor elements group, wherein
Each group comprises: the track ring of annular, and it has the utmost point of settling in a circumferential direction around rotating shaft; With columned ring-shaped rotor, it has a plurality of permanent magnets relative with stator poles, that settle in a circumferential direction along annulus gap; And
The permanent magnet of adjacent rotor element group is skew mutually in the axial direction.
18. the rotary permanent magnet electric motor of claim 17, wherein the stator poles of adjacent stators group is aimed in the axial direction.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/160,254 US6727629B1 (en) | 2002-06-04 | 2002-06-04 | Rotary electric motor having a plurality of shifted stator poles and/or rotor poles |
| US10/160,257 | 2002-06-04 | ||
| US10/160,257 US6717323B1 (en) | 2002-06-04 | 2002-06-04 | Rotary electric motor having a plurality of skewed stator poles and/or rotor poles |
| US10/160,254 | 2002-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1659766A true CN1659766A (en) | 2005-08-24 |
Family
ID=33567012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN038128217A Pending CN1659766A (en) | 2002-06-04 | 2003-03-28 | Rotary electric motor having a plurality of shifted stator poles and/or rotor poles |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1516416A1 (en) |
| JP (1) | JP2005529576A (en) |
| KR (1) | KR20050004288A (en) |
| CN (1) | CN1659766A (en) |
| AU (1) | AU2003225911A1 (en) |
| BR (1) | BR0311579A (en) |
| CA (1) | CA2483628A1 (en) |
| MX (1) | MXPA04012144A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577055A (en) * | 2009-04-15 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | Drive with curved linear induction motor |
| CN103872802A (en) * | 2012-12-07 | 2014-06-18 | 财团法人工业技术研究院 | Stator structure |
| CN111566903A (en) * | 2017-12-21 | 2020-08-21 | 博泽沃尔兹堡汽车零部件欧洲两合公司 | Rotor for an electric motor and electric motor |
| CN112564354A (en) * | 2020-12-03 | 2021-03-26 | 河北新四达电机股份有限公司 | Magnetic isolation method for permanent magnet motor |
| CN117220563A (en) * | 2023-11-07 | 2023-12-12 | 深圳市杰美康机电有限公司 | Motor control method and device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2007257187A1 (en) * | 2006-06-08 | 2007-12-13 | Exro Technologies Inc. | Poly-phasic multi-coil generator |
| JP2008289335A (en) * | 2007-05-21 | 2008-11-27 | Honda Motor Co Ltd | Electric motor |
| WO2011101886A1 (en) * | 2010-02-16 | 2011-08-25 | 東芝三菱電機産業システム株式会社 | Synchronous generator |
| US8917004B2 (en) * | 2011-12-07 | 2014-12-23 | Rotonix Hong Kong Limited | Homopolar motor-generator |
| CN102437812B (en) * | 2011-12-30 | 2014-05-14 | 泰豪科技股份有限公司 | Dynamic magnetic link control method used for carrying out frequency conversion and speed regulation on asynchronous motor |
| EP2685607B1 (en) | 2012-07-09 | 2015-04-01 | Siemens Aktiengesellschaft | Fixing of permanent magnets to a rotor |
| EP2685615B1 (en) * | 2012-07-09 | 2015-06-24 | Siemens Aktiengesellschaft | Improved balancing of a rotor |
| KR101918455B1 (en) | 2012-07-27 | 2018-11-15 | 삼성전자주식회사 | Low power communication device of schedulling data segments using hold time or lock tiem of phase locked loop |
-
2003
- 2003-03-28 EP EP03757241A patent/EP1516416A1/en not_active Withdrawn
- 2003-03-28 JP JP2004512271A patent/JP2005529576A/en active Pending
- 2003-03-28 AU AU2003225911A patent/AU2003225911A1/en not_active Abandoned
- 2003-03-28 KR KR10-2004-7019747A patent/KR20050004288A/en active IP Right Grant
- 2003-03-28 BR BR0311579-8A patent/BR0311579A/en not_active IP Right Cessation
- 2003-03-28 MX MXPA04012144A patent/MXPA04012144A/en unknown
- 2003-03-28 CN CN038128217A patent/CN1659766A/en active Pending
- 2003-03-28 CA CA002483628A patent/CA2483628A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577055A (en) * | 2009-04-15 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | Drive with curved linear induction motor |
| CN103872802A (en) * | 2012-12-07 | 2014-06-18 | 财团法人工业技术研究院 | Stator structure |
| CN111566903A (en) * | 2017-12-21 | 2020-08-21 | 博泽沃尔兹堡汽车零部件欧洲两合公司 | Rotor for an electric motor and electric motor |
| CN112564354A (en) * | 2020-12-03 | 2021-03-26 | 河北新四达电机股份有限公司 | Magnetic isolation method for permanent magnet motor |
| CN117220563A (en) * | 2023-11-07 | 2023-12-12 | 深圳市杰美康机电有限公司 | Motor control method and device |
| CN117220563B (en) * | 2023-11-07 | 2024-02-13 | 深圳市杰美康机电有限公司 | Motor control method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003225911A1 (en) | 2003-12-22 |
| KR20050004288A (en) | 2005-01-12 |
| JP2005529576A (en) | 2005-09-29 |
| MXPA04012144A (en) | 2005-04-19 |
| CA2483628A1 (en) | 2003-12-18 |
| EP1516416A1 (en) | 2005-03-23 |
| BR0311579A (en) | 2005-04-26 |
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