CN1659768A - Rotary permanent magnet electric motor with varying air gap between interfacing stator and rotor elements - Google Patents
Rotary permanent magnet electric motor with varying air gap between interfacing stator and rotor elements Download PDFInfo
- Publication number
- CN1659768A CN1659768A CN038128284A CN03812828A CN1659768A CN 1659768 A CN1659768 A CN 1659768A CN 038128284 A CN038128284 A CN 038128284A CN 03812828 A CN03812828 A CN 03812828A CN 1659768 A CN1659768 A CN 1659768A
- Authority
- CN
- China
- Prior art keywords
- stator
- air gap
- rotor
- permanent magnet
- magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
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
- H02K1/12—Stationary parts of the magnetic circuit
-
- 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
- H02K1/14—Stator cores with salient poles
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- 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
-
- 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
- H02K1/26—Rotor cores with slots for windings
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A permanent magnet motor is configured with selective variation of the radial distance between an interfacing pair of rotor permanent magnet and stator pole along the circumferential length of the pair. The effects of cogging torque on the overall torque signature can be controlled by setting an appropriate air gap variation profile. The stator pole and rotor magnet surfaces may be sloped with respect to each other, the angle therebetween being selected to obtain desired cogging torque compensation. Other air gap variation profiles may include provision of concave surfaces, the degree of concavity being selectable.
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, the common unsettled U. S. application No.10/160 that people such as Maslov submitted on June 4th, 2002,257 and the common unsettled U. S. application No.10/160 that submits on June 4th, 2002 of people such as Maslov, 254, 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.
Background of invention
The present invention relates to rotary electromotor, more specifically, relate to a kind of permanent magnet motor, it has at the rotor permanent magnet of adjacency and the radial air gap of the varying dimensions between the stator poles.
Background of invention
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 the common pending application No.09/826 that submits to such as in April 5 calendar year 2001, 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.In the patent application that preamble is mentioned, can see suitable stator support structure,, not be described herein in order to make effective electrical machine element more high-visible.
Fig. 2 is that it is relevant with rotor permanent magnet 21 that stator poles is depicted as such as the partial plan layout of the motor of Fig. 1 explanation.Each stator core element 36 comprises having the extremely right of base part 31 and pole shoe part 32.These utmost points integrally interlink by link part 33.Unshowned be used for each extremely right winding of energizing can be formed in known manner pole base partly go up or link the part.
Fig. 3 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 motor, in the scope that changes, produced start and stop torque in an identical manner with one-piece stator magnetic core.
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 the stator core of integral body.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 one-piece stator cored structure, 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 10/160,257 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.
The common pending application No.10/160 that on June 4th, 2002 submitted to, 254, by offsetting the influence of the start and stop torque that produces in a plurality of axially spaced rotors and the stator component group, at needs mentioned above.In the axial direction, the utmost point of each discrete axially oriented stator core is moved or skew relative to each other, in order under the situation of the relation of the position between the stator poles that does not limit on the circumferencial direction, to eliminate the influence of start and stop torque.Replacedly, 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, to eliminate the influence of start and stop torque.
Making the influence of moment of torsion ripple and start and stop torque reduce to that minimum continues under the situation of breakdown torque fan-out capability not is important target.
Summary of the invention
The present invention by optionally change the rotor permanent magnet of adjacency and stator poles between along the radial distance of this right circumferential direction, satisfied these needs at least in part.Rotor has a plurality of permanent magnets, and this permanent magnet has essentially identical length in a circumferential direction and distributing in a circumferential direction around rotating shaft.A plurality of stator poles distribute around air gap, and all utmost points have the length with the permanent magnet same length in a circumferential direction.By stator poles and rotor magnet suitable air gap variation configuration is set, can controls the influence of start and stop torque,, this air gap variation configuration is called air gap (air gap profile) herein wherein for illustrative ease to whole torque characteristic to adjacency.Air gap be cross over stator pole shoes and the rotor magnet faced between change from this radial distance the air gap of end to end.
Suitable air gap depends on the required motor operation conditions and the parameter of electric machine, such as the condition of number, winding energization sequence and other expections of stator poles and rotor magnet.Can obtain this style by the distance that the rotating shaft of rotor magnet surface or stator pole surface is left in change.Rotor magnet surface or stator pole surface can be in the constant radial distance of leaving this, and another surface has variable configuration simultaneously.Replacedly, the distance of rotor magnet and pole shoe all is variable.In a preferred embodiment, air gap is identical for the rotor magnet of all of its neighbor with stator pole combinations.That is, all stator poles have identical configuration, and all rotor magnets have identical configuration.
One of this air gap that the present invention considered the rotor of adjacency and stator between, the decline of the basically identical of radial distance is provided to second end from this first right end.If rotor permanent magnet has relative constant thickness, then stator pole surface tilts with respect to rotor magnet surface.Replacedly, permanent magnet can from first to last reduce radial thickness.
In another air gap, each rotor magnet surface can be in the constant radial distance of leaving axle, and simultaneously stator pole shoes has variable radial thickness and has sunk surface in the face of air gap.Still is that the stator surrounding rotor is provided with sinking degree according to rotor ring around stator.As the variation scheme, permanent magnet can have variable radial thickness and have the sunk surface of facing the air gap with selected sinking degree.
In the stator arrangement of electromagnet core part, can provide electrode structure mentioned above with favourable result with a plurality of discrete ferromagnetic isolation.This each part can be by extremely to forming, as shown in Figure 1.Stator is single annular ring, and it is in the axial direction around the single utmost point and in a circumferential direction around a plurality of extremely right.In other configuration, a plurality of stator poles are at axially-spaced, and its electromagnet core by a plurality of discrete ferromagnetic isolation partly forms.Each core segment comprises the utmost point by the whole link of one or more link part, and this link part is extended on the direction of rotating shaft usually.Stator has formed a plurality of utmost points in the axial direction like this, and the single utmost point of each part is distributed on the circumferencial direction of each ring.In a kind of configuration in back, rotor forms along the axially spaced ring of air gap in the discrete magnet of circumferencial direction arrangement, and the number of rotor ring equals the number of the stator poles in the stator core part.
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 multiple.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 be shown in the motor of Fig. 1 explanation stator poles with respect to the diagram of the partial plan layout of rotor permanent magnet.
Fig. 3 is the partial plan layout of Fig. 1 element, has been described, the relative position of stator pole surface and rotor surface three moment in the motor operation process.
Fig. 4 is the diagram of stator poles according to the present invention with respect to the partial plan layout of permanent magnet surfaces.
Fig. 5 is according to the stator poles of the variation scheme of Fig. 4 structure diagram with respect to the partial plan layout of permanent magnet surfaces.
Fig. 6 changes the diagram of the stator poles of scheme with respect to the partial plan layout of permanent magnet surfaces according to of the present invention another.
Fig. 7 is according to the stator poles of the variation scheme of Fig. 6 structure diagram with respect to the partial plan layout of permanent magnet surfaces.
Fig. 8 is the three-dimensional exploded diagrammatic sketch with motor of axially aligned stator and rotor elements, and such as common pending application No.10/067, disclosed in 305, it can incorporate the stator pole structural of Fig. 3～6 into.
Detailed Description Of The Invention
Notion of the present invention is applicable to have the single rotor of settling in a circumferential direction and the motor of stator component group, these rotors and stator component are about the radial air gap arranged concentric, such as the motor of Fig. 1, also be applicable to motor with two or more axially spaced rotors and stator component group.Fig. 4 be such as the motor of Fig. 1 explanation revise according to the present invention shown in stator poles with respect to the diagrammatic sketch of the partial plan layout of permanent magnet surfaces.Should be appreciated that this layout represent to have by air gap separate, each other in the rotor of concentric relation and the electric rotary machine of stator.For dispose clear for the purpose of, show do not have supporting construction, the rotor magnet 21 of alternate magnetic polarity continuously.Each stator core element 36 comprises having the extremely right of base part 31 and pole shoe part 32.These utmost points integrally interlink by link part 33.Can be formed for each extremely right unshowned winding of energizing on the pole base part or on the link part in known manner.Each pole shoe partly stretches out from pole base on two circumferencial directions by the pole shoe extension.
The pole shoe of the stator core element shown in the right-hand component 36 is positioned at the position of aiming at rotor magnet 21 in the drawings.The pole shoe of adjacency and magnet are along having essentially identical length on the direction of air gap.Each permanent magnet has identical radial thickness, so its surface along air gap has the distance of the unanimity of leaving rotating shaft.In plan view, the surface of stator pole faces tilts with respect to permanent magnet surfaces in air gap, makes that the radial distance in the air gap between them increases to right-hand member basically identical ground from this right left end.If in the normal motor operation, rotor is inswept on direction from right to left with respect to stator, then the leading edge of rotor magnet and stator pole faces are overlapping, have the air gap separation of decline simultaneously.For relative stator and rotor elements, than the motor configuration with constant air gap size, the conversion shock effect of start and stop torque becomes level and smooth.If in the normal motor operation, rotor is inswept on direction from left to right with respect to stator, then the leading edge of rotor magnet and stator pole faces are overlapping, have the air gap separation of increase simultaneously.When the inswept stator poles of rotor magnet, than constant air gap configuration, the commentaries on classics gravitational attraction power between them diminishes gradually.Like this, in this direction of rotation any one, can determine that the gradient of the variable air gap configuration of Fig. 4 has obtained required overall torque signature.
Fig. 5 has illustrated the variation scheme of Fig. 4 structure.As shown in this plan view, stator pole faces is positioned on the horizontal plane, is illustrated in the distance that has the unanimity of leaving rotating shaft in a circumferential direction along air gap thus.The surface of rotor permanent magnet 21 tilts, in order to the described identical variable-air-gap effect with Fig. 4 to be provided.
In the configuration of Fig. 6, each permanent magnet has identical radial thickness.As shown in this plan view, the permanent magnet surfaces in the air gap is positioned on the horizontal plane, is illustrated in along the distance that has the unanimity of leaving rotating shaft on the air gap direction.Stator pole surface caves in respect to rotor magnet surface, and for the motor of stator surrounding rotor wherein, this sinking degree is used to keep the sinking degree that leaves the consistent distance of rotating shaft greater than required.Therefore, the stator poles of each adjacency and rotor magnet have defined the variable-air-gap distance between them to (for example, among the figure right-hand component to).When rotor magnet near and during inswept stator poles, by assembling magnetic flux distributions to be similar to by the mode of converging optical lens converging light, this variable-air-gap is different from the influence of consistent air gap configuration to the influence of start and stop torque.Can regulate sinking degree when needed in order to improve whole torque characteristic.
Fig. 7 has illustrated the variation scheme of Fig. 6 structure.As shown in this plan view, stator pole faces is positioned on the horizontal plane, is illustrated in the distance that has the unanimity of leaving rotating shaft in a circumferential direction along air gap thus.Cave in respect to magnet surface in the surface of rotor permanent magnet 21, in order to the described identical variable air gap effects with Fig. 6 to be provided.
The advantage of the variation scheme of stator pole structural mentioned above is applicable to other stator/rotor configurations.For example, have the whole stator of stator core continuously and can have the utmost point that forms as any one described protrusion in Fig. 3～7, in order to the start and stop torque compensation to be provided.This polar form can form in order to alleviate the start and stop torque phenomenon in the motor with single axially aligned magnet and stator poles row.
Fig. 8 illustrated such as common pending application No.10/067, the three-dimensional exploded diagrammatic sketch of disclosed motor in 305.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.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 at circumferencial direction along air gap; 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.
Stator poles shown in Figure 8 and rotor magnet can be built as the form shown in the variation scheme of Fig. 3～7 any one.When a large amount of magnet and stator poles were provided on circumferencial direction and rotating shaft direction, disturbing for potential very big start and stop torque provided compensation.
In this disclosure, only illustrate and described the preferred embodiments of the present invention and several its multifarious example.Should be appreciated that the present invention can be used in multiple other combinations and the environment, and can as the scope of the notion of the present invention herein explained in change and revise.For example, can use whole rather than segmentation, stator core spaced apart from each other in the axial direction to realize each layout that illustrates in the accompanying drawing, obtain favourable result.And, although in order to explain that clearly the example of explanation shows the stator poles spacing and is substantially equal to the rotor pole spacing, stator poles between circumferencial direction on distance can be greater than or less than rotor magnet between distance.
Although the specific 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 the powdered alloying technology can form Any shape in fact.Therefore, can make specific core configuration be suitable for required magnetic flux distributions.For example, be in and in the notion of the present invention be, provide projection or other geometric jacquard patterning unit surfaces, and different poles can comprise the pole shoes with different configurations respectively to group.The configuration of projection will be that the magnetic flux distributions figure is dispersed.
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 (12)
1. a rotary electromotor comprises stator and rotor around the rotating shaft arranged concentric, and this stator and rotor are separated by radial air gap, wherein
Rotor comprises a plurality of permanent magnets that distribute at circumferencial direction around rotating shaft, and this permanent magnet has essentially identical length in a circumferential direction;
Stator comprises a plurality of utmost points that distribute around air gap, and this utmost point has and the essentially identical length of this magnet length in a circumferential direction; And
The rotor permanent magnet of adjacency and stator poles between air gap in radial distance on this right circumferential direction, be variable.
2. the rotary electromotor of claim 1, wherein described adjacency between air gap in radial distance originally as one man descend from this first right end to this second right end group in a circumferential direction.
3. the rotary electromotor of claim 2, the right permanent magnet of wherein said adjacency has constant relatively radial thickness.
4. the rotary electromotor of claim 2, the descending of the right permanent magnet of wherein said adjacency from first end to the second end radial thickness.
5. the rotary electromotor of claim 1, wherein stator poles comprises the pole shoe with variable radial thickness, this pole shoe has the sunk surface in the face of air gap.
6. the rotary electromotor of claim 5, wherein rotor ring is around stator.
7. the rotary electromotor of claim 1, wherein permanent magnet has variable radial thickness and has sunk surface in the face of air gap.
8. the rotary electromotor of claim 1, wherein stator comprises the electromagnet core part of a plurality of discrete ferromagnetic isolation, this each core segment comprises at least one described utmost point.
9. the rotary electromotor of claim 8, wherein each core segment comprises that this link is partly extended usually by the utmost point of the whole link of one or more link part on the direction of rotating shaft; And
Rotor permanent magnet has in the face of the surface of air gap and forms along the axially spaced ring of air gap in the discrete magnet of circumferencial direction arrangement, and the number of described ring equals the number of the stator poles in the stator core part.
10. the rotary electromotor of claim 8, wherein described adjacency between air gap in radial distance in the increase from this first right end to this second right this unanimity of end group in a circumferential direction.
11. the rotary electromotor of claim 8, wherein stator poles comprises the pole shoe with variable radial thickness, and this pole shoe has the sunk surface in the face of air gap.
12. the rotary electromotor of claim 8, wherein permanent magnet has variable radial thickness and has sunk surface in the face of air gap.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/160,254 | 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 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 | ||
| US10/207,848 US6727630B1 (en) | 2002-07-31 | 2002-07-31 | Rotary permanent magnet electric motor with varying air gap between interfacing stator and rotor elements |
| US10/207,848 | 2002-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1659768A true CN1659768A (en) | 2005-08-24 |
| CN100588088C CN100588088C (en) | 2010-02-03 |
Family
ID=33458528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03812828A Expired - Fee Related CN100588088C (en) | 2002-06-04 | 2003-03-28 | Rotary permanent magnet electric motor with varying air gap between coadjacent stator and rotor elements |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1512212A1 (en) |
| JP (1) | JP2005529575A (en) |
| KR (1) | KR100741230B1 (en) |
| CN (1) | CN100588088C (en) |
| AU (1) | AU2003223320A1 (en) |
| BR (1) | BR0311507A (en) |
| CA (1) | CA2482974C (en) |
| MX (1) | MXPA04012142A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222154B (en) * | 2007-01-12 | 2010-07-28 | 台达电子工业股份有限公司 | Rotation structure of permanent magnet motor |
| CN103208872A (en) * | 2012-01-16 | 2013-07-17 | 三星电子株式会社 | Rotor and motor including the same |
| CN103560055A (en) * | 2013-11-16 | 2014-02-05 | 沈阳工业大学 | Permanent magnet variable air gap limited rotation angle motor operation mechanism of high-voltage breaker |
| CN108933511A (en) * | 2018-08-22 | 2018-12-04 | 哈尔滨理工大学 | Eccentric tooth-like permanent magnetism vernier motor |
| CN111095755A (en) * | 2018-08-01 | 2020-05-01 | 加贺绿能科技股份有限公司 | Hybrid variable magnetic energy-saving motor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2468297B (en) * | 2009-03-03 | 2014-11-19 | Dyson Technology Ltd | Electric machine with an asymmetric stator core |
| TWI460967B (en) * | 2012-10-17 | 2014-11-11 | Ind Tech Res Inst | Assembly of rotor and stator |
| KR101896714B1 (en) * | 2012-10-24 | 2018-09-07 | 현대자동차주식회사 | Rotor for interior permanent magnet motor |
| TWI496385B (en) * | 2013-04-30 | 2015-08-11 | Ind Tech Res Inst | Mover and stator assembly of electric machine |
| CN104135090B (en) | 2013-04-30 | 2017-01-18 | 财团法人工业技术研究院 | Mover and stator mechanism of motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2118785B (en) * | 1982-03-10 | 1986-08-13 | Japan Servo | Direct-current brushless motor |
| DE19725522B4 (en) * | 1997-06-17 | 2009-09-17 | Robert Bosch Gmbh | Electronically commutated motor |
| US5962938A (en) * | 1997-10-21 | 1999-10-05 | General Electric Company | Motor with external rotor |
| JP2000166131A (en) * | 1998-12-02 | 2000-06-16 | Yoho Han | Motor or stator for generator |
-
2003
- 2003-03-28 CA CA002482974A patent/CA2482974C/en not_active Expired - Fee Related
- 2003-03-28 AU AU2003223320A patent/AU2003223320A1/en not_active Abandoned
- 2003-03-28 BR BR0311507-0A patent/BR0311507A/en not_active IP Right Cessation
- 2003-03-28 KR KR1020047019746A patent/KR100741230B1/en not_active IP Right Cessation
- 2003-03-28 EP EP03719436A patent/EP1512212A1/en not_active Ceased
- 2003-03-28 JP JP2004512270A patent/JP2005529575A/en active Pending
- 2003-03-28 MX MXPA04012142A patent/MXPA04012142A/en active IP Right Grant
- 2003-03-28 CN CN03812828A patent/CN100588088C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222154B (en) * | 2007-01-12 | 2010-07-28 | 台达电子工业股份有限公司 | Rotation structure of permanent magnet motor |
| CN103208872A (en) * | 2012-01-16 | 2013-07-17 | 三星电子株式会社 | Rotor and motor including the same |
| US9831729B2 (en) | 2012-01-16 | 2017-11-28 | Samsung Electronics Co., Ltd. | Electric motor's sectional rotor with asymmetric poles having permanent magnets |
| CN103208872B (en) * | 2012-01-16 | 2017-12-12 | 三星电子株式会社 | Rotor and the engine including the rotor |
| CN103560055A (en) * | 2013-11-16 | 2014-02-05 | 沈阳工业大学 | Permanent magnet variable air gap limited rotation angle motor operation mechanism of high-voltage breaker |
| CN111095755A (en) * | 2018-08-01 | 2020-05-01 | 加贺绿能科技股份有限公司 | Hybrid variable magnetic energy-saving motor |
| CN111095755B (en) * | 2018-08-01 | 2021-12-03 | 加贺绿能科技股份有限公司 | Hybrid variable magnetic energy-saving motor |
| CN108933511A (en) * | 2018-08-22 | 2018-12-04 | 哈尔滨理工大学 | Eccentric tooth-like permanent magnetism vernier motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2482974A1 (en) | 2003-12-18 |
| KR100741230B1 (en) | 2007-07-19 |
| KR20050004287A (en) | 2005-01-12 |
| EP1512212A1 (en) | 2005-03-09 |
| MXPA04012142A (en) | 2005-04-19 |
| BR0311507A (en) | 2005-02-22 |
| CA2482974C (en) | 2007-01-09 |
| JP2005529575A (en) | 2005-09-29 |
| AU2003223320A1 (en) | 2003-12-22 |
| CN100588088C (en) | 2010-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100583602C (en) | Rotary permanent magnet electric motor having stator pole shoes of varying dimensions | |
| CN1659767A (en) | Rotary electric motor having a plurality of skewed stator poles and/or rotor poles | |
| US6727630B1 (en) | Rotary permanent magnet electric motor with varying air gap between interfacing stator and rotor elements | |
| CN1561569A (en) | Rotary electric motor having axially aligned stator poles and/or rotor poles | |
| US5081388A (en) | Magnetic induction motor | |
| US6727629B1 (en) | Rotary electric motor having a plurality of shifted stator poles and/or rotor poles | |
| CN1792016A (en) | Generator having axially aligned stator poles and/or rotor poles | |
| CN101454962B (en) | Electrical synchronous machine | |
| CN1520632A (en) | Brushless DC electric motor | |
| CN100588088C (en) | Rotary permanent magnet electric motor with varying air gap between coadjacent stator and rotor elements | |
| CN1659766A (en) | Rotary electric motor having a plurality of shifted stator poles and/or rotor poles | |
| CN1168564A (en) | Two-phase unipolar driving brushless DC motor | |
| CN1242639A (en) | Brushless DC motor | |
| US20060113848A1 (en) | Linear brushless D.C. motor with stationary armature and field and with integralable magnetic suspension | |
| US6844645B2 (en) | Permanent magnet motor rotor having magnetic permeable material for enhanced flux distribution | |
| CN1515063A (en) | Rotating electric machine | |
| CN1135114A (en) | Electrical driving device comprising more than one permanent-magnet-excited rotor and shaver comprising said driving device | |
| CN105305683A (en) | Rotor for electrical machine | |
| CN1623268A (en) | Rotary electric motor having concentric annular members | |
| CN101379684A (en) | Rotor for magnetic motor | |
| WO2021149420A1 (en) | Electric motor with two degrees of freedom | |
| CN201994818U (en) | Mixed short magnetic circuit switch reluctance motor and rotor structure thereof | |
| CN101127475B (en) | Step motor of stator with remote pair assisted magnetic pole | |
| CN114726179A (en) | Rotating electrical machine | |
| CN102723836A (en) | Compound short magnetic circuit switch reluctance motor and rotor structure thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20130328 |