CN100508334C - Brushless rotary motor - Google Patents

Brushless rotary motor Download PDF

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Publication number
CN100508334C
CN100508334C CNB2006100345676A CN200610034567A CN100508334C CN 100508334 C CN100508334 C CN 100508334C CN B2006100345676 A CNB2006100345676 A CN B2006100345676A CN 200610034567 A CN200610034567 A CN 200610034567A CN 100508334 C CN100508334 C CN 100508334C
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China
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magnetic
pole
stator
utmost point
permanent magnet
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CN1845427A (en
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陆纬庭
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Union Plastic Hangzhou Machinery Co Ltd
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Union Plastic Hangzhou Machinery Co Ltd
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Publication of CN100508334C publication Critical patent/CN100508334C/en
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Abstract

The brushless rotating motor comprises a rotator with composite permanent magnetic elements by everyone with two poles arranged roundly, and a stator with composite coaxial EM members by everyone with one couple poles magnetic isolated and circled the rotating shaft. Wherein, at least part of stator ring is covered by the rotator ring to define two radial air gaps on rotator plane; thereby, it defines one radial air gap and two axial air gaps between pole of EM member and magnetic element. This invention can reduce harmful effect from axial unbalance and improve magnetic flux distribution.

Description

Brushless rotary motor
Technical field
The present invention relates to a kind of motor, refer to a kind of brushless rotary motor structure especially.
Background technology
With general purpose motor, no matter the magnetic principle that the magnetic pole same sex is repelled each other, there is a natural attraction between the sexes is all adopted in the running of DC motor or alternating current motor between its rotor and stator.The design of early stage most motor is all only used one of excitatory body to bring in and produced changes distance, and half of motor potential also only used in this kind design at most.But the design of many turning motors is arranged now, utilize the two ends of magnetizing coil,, produce the commentaries on classics distance of motor so that effective air gap surface area bigger between rotor and stator to be provided.But the magnetic pole of the structure of traditional common motor meeting because of adjoining cause the concentrated of magnetic flux to be affected, and the coil that adjoins also has disadvantageous conversion disturbing effect.
In Chinese patent Granted publication CN1650501A, people such as Bo Lisi A Maas Lip river husband propose a kind of turning motor, its two ends that utilize magnetizing coil are with the air gap surface area between increase rotor and stator, and the conversion disturbing effect of adjoining the magnetic flux between coil by independently extremely right separately arrangement with processing.Include a plurality of independent separately excitatory electromagnets on the stator of this DC motor, and with the rotor magnet axially arranged and stator poles to the magnetic flux distribution of concentrating very much is provided, make magnetic flux be placed on big relatively surface to facilitate high moment by concentrated.And,, eligibly control the coil current on the electromagnet respectively in the different time with the relative position of perceptron detecting rotor and stator, cause the smooth-going running of motor.
In order to obtain bigger total effective air gap surface area, and in No. 6891306 certificate of United States Patent (USP) mandate, people such as Maslov are gained the structure of above-mentioned motor.The increase of the surface by the motor stator utmost point and the magnet of rotor is modified the distribution of magnetic flux by the concentrated of magnetic flux, so that bigger magnetic flux distribution to be provided.Make the motor structure provide the bigger continuous magnetic flux among rotor elements and stator component to produce the path.The surface area of the structure of this motor framework passes a plurality of air gaps by increase rotor pole and relative stator poles is to impel flux concentrating on big relatively surface, to promote the high torque (HT) ability of motor further.But the interaction of the electromagnetic force of aforesaid two kinds of motor is based on axially; If when having axial imbalance to take place, will easily motor be had bad influence.
Summary of the invention
The object of the present invention is to provide a kind of brushless rotary motor, it can reduce when axial uneven the generation harmful effect to motor, and magnetic flux can be concentrated on the bigger relatively surface, and can improve the distribution of magnetic flux.
For achieving the above object, technical solution of the present invention is:
A kind of brushless rotary motor, it includes: a rotor contain a plurality of magnetic elements that contain permanent magnet that are configured to constitute a colyliform ring around the circumferencial direction of rotating shaft, and each magnetic element has two magnetic poles separately; A stator, constituting a colyliform ring, and each electromagnet member is contained the paired utmost point to the electromagnet member of containing a plurality of magnetic isolation that are arranged coaxial around rotating shaft; And stator colyliform ring have at least part by rotor colyliform ring institute around encirclement, in addition, at rotor cover to two radial air gaps between definition rotor and the stator on the two sides radially; At this, one of them is corresponding with two magnetic poles of rotor magnetic component separately for each utmost point of stator electromagnet member's the paired utmost point, with radial air gap of respective poles definition and two the axial corresponding air gaps in two magnetic poles of each utmost point of electromagnet member and magnetic element.
Each electromagnet member's of described stator the paired utmost point connects with the core of magnetic conductivity, and each utmost point of the utmost point each has three pole-faces in pairs, and there is a coil on electromagnet member's core, to form, when coil in addition during current excitation, pole-face separately produces opposite polarity of the magnetic field at the two poles of the earth of the paired utmost point of electromagnet member, and the polarity of the magnetic field that three pole-faces that make each utmost point produce is identical, and when the current reversal passed through in the coil, the polarity of the magnetic field of the two poles of the earth pole-face of the utmost point also reverses thereupon in pairs.
The cross section of each utmost point of each electromagnet member's of described stator the paired utmost point takes the shape of the letter U separately approximately, towards one of this two radial air gap, two other pole-face of this U type pole-face is then towards separately axial air-gap with pole-face for bottom pole-face in three pole-faces in the U-shaped cross-section outside.
The structure that each electromagnet member of described stator forms via the non-magnetic material separately is fixed to respectively on the stator, makes each electromagnet member of stator not have the contact of ferromagnetism each other.
Each magnetic pole pole-face of two magnetic poles of described each magnetic element of rotor only demonstrates a single polarity of the magnetic field, and opposite with the polarity of the magnetic field of another magnetic pole pole-face.
Described each magnetic element that contains permanent magnet has the c-shaped approximately connecting support that forms with magnetic conductive material; And there are a plurality of permanent magnets to be placed in the inner surface of the C shape connecting support of each magnetic element, to form two magnetic poles of magnetic element; Each magnetic pole of magnetic element has three pole surface that polarity of the magnetic field is identical separately, three pole-faces of each magnetic pole be parallel to the rotating shaft pole-face towards radial air gap one of them, two other pole-face is then towards separately axial air-gap; The pole-face of each magnetic pole of magnetic element interacts across the corresponding pole-face of the corresponding utmost point of the air gap of facing separately and the paired utmost point of stator separately; And each permanent magnet that forms the magnetic element magnetic pole only demonstrates a single polarity of the magnetic field on the surface towards air gap, and opposite with the polarity of the magnetic field of the permanent magnet backside surface of the connecting support inner surface that is bonded to magnetic element.
Each magnetic pole of described magnetic element each has three bipolarity permanent magnets to form three pole-faces of magnetic pole.
The permanent magnet of each magnetic pole of described magnetic element has the cross section that takes the shape of the letter U approximately, and with three pole-faces of formation magnetic pole, and the bottom pole-face in three pole-faces of each U-shaped magnetic pole is parallel to rotating shaft.
Permanent magnet on two magnetic poles of described each magnetic element is separated with radial clearance each other.
A plurality of permanent magnets of described rotor arrange around the circumferencial direction of rotating shaft adjoin permanent magnet along around the circumferencial direction of rotating shaft with pole polarity N and the continuous alternate configurations of S, and the permanent magnet that adjoins around the circumferencial direction of rotating shaft is each other with separated.
The described permanent magnet that adjoins around the circumferencial direction of rotating shaft does not have the contact of ferromagnetism each other.
The c-shaped approximately connecting support part of the magnetic element of described rotor can be formed by the material of non-magnetic.
Contain the radial clearance between two magnetic poles that extra permanent magnet is positioned at this magnetic element on the described rotor; And the magnetic direction that aforementioned extra permanent magnet has is the circumferencial direction around rotating shaft.
After adopting such scheme, because the stator component that the stator of brushless rotary motor of the present invention has a plurality of magnetic isolation, interact with a plurality of rotor elements that contain permanent magnet, and each utmost point of rotor elements has a radial air gap and two axial corresponding air gaps with the magnetic flux path of the corresponding utmost point of stator component.The interaction of its electromagnetic force is based on radially, and increase the surface area of the rotor pole pass air gap and relative stator poles further, impelling flux concentrating on relatively bigger surface, the high torque (HT) ability of further promoting brushless rotary motor; And outside the ability of reaching the high efficiency of brushless rotary motor, high output torque, also can obtain brushless rotary motor better geometric balance in the space, to obtain the improvement of the running characteristic of safety flexibly.
More specifically, proposed a kind of structure of brushless rotary motor in the first embodiment of the invention particularly, it contains a stator and a rotor.One of them is corresponding with two magnetic poles of rotor magnetic component separately for each utmost point of stator electromagnet member's the paired utmost point; Thereby each utmost point of electromagnet member is separated with a radial air gap and two axial corresponding air gaps with the respective poles of magnetic element.In addition, each electromagnet member's of stator coil has switch separately to do excitatory, these paired magnetic poles of distinguishing excitatory stator electromagnet member are separately separated around the rotor permanent-magnet pole of surrounding by air gap and with it, produce suitable gravitation or repulsion with magnetic pole, so that rotation to be provided with the permanent magnetic field of corresponding rotor magnetic component.Each embodiment by extra increase rotor magnetic pole towards the axial pole-face and the pole-face of corresponding stator poles, extra increase with the surface area of the rotor magnetic pole that obtains to pass air gap and corresponding stator poles, thereby can impel flux concentrating on big relatively surface, promote the high torque (HT) ability of brushless rotary motor further; Simultaneously by the radial equilibrium towards radially main pole face of motor, extra structure advantage is provided, the structure arrangement of the independent component separately on the framework of brushless rotary motor, pay close attention to the geometric spatial balance of brushless placement motor, to obtain the further improvement of the running characteristic of safety flexibly; And also can be by a plurality of electromagnet members of the stator of brushless rotary motor and a plurality of magnetic elements of rotor in radially spatial balance arrangement, to reduce single Individual components when if radially uneven the generation arranged, to the harmful effect of motor.
Though rotor magnetic component and the stator electromagnet member's corresponding with it number is not by specific proposition, but the present invention is when specializing realization, stator electromagnet member's the number and the number of rotor magnetic component can be identical also can be different, make decision with the requirement that meets design.And each gap length in the separate gap of the permanent magnet that adjoins along the circumferencial direction of rotating shaft of rotor magnetic component can not need identically, and each gap length in the gap of the stator mutual intercropping magnetic isolation of electromagnet member of adjoining along the circumferencial direction of rotating shaft can certainly not need identical.Thereby can reduce the brushless rotary motor torque pulsation in when operation via proper arrangement.
In the second embodiment of the present invention, the U type permanent magnet of each magnetic pole of the rotor magnetic component of first embodiment is substituted with three permanent magnets separately, make each magnetic pole of two opposite magnetic poles of the pole polarity of each magnetic element still have three pole-faces that polarity of the magnetic field is identical separately.Arrange like this, though can adverse effect be arranged to the magnetic flux that produces moment concentrated, the preparation of permanent magnet is more or less freely; And the operation of brushless rotary motor be there is no difference.
In the third embodiment of the present invention, magnetic flux distribution for two magnetic poles that will improve magnetic element, there is extra bipolarity permanent magnet to be positioned at the radial clearance of each magnetic element two magnetic pole pole-face on the rotor towards the permanent magnet of axial corresponding air gap part, this extra permanent magnet can be placed in the pole-face of the U-shaped permanent magnet that axially adjoins of each magnetic element towards the radial extremity of the permanent magnet of axial corresponding air gap part, and the magnetic direction that has of extra permanent magnet generally is the circumferencial direction around rotating shaft approximately, and with magnetic direction towards identical circumferencial direction, the gauge of extra permanent magnet can have identical gauge with the U-shaped permanent magnet that drives brushless rotary motor.
Further improve, in the third embodiment of the present invention, the rotor of brushless rotary motor is except adding extra permanent magnet; On rotor, the permanent magnet that adjoins around the circumferencial direction of rotating shaft is each other not only with separated and there is not the contact of ferromagnetism each other.Therefore, magnetic flux distribution can be modified to more smooth, to obtain the more concentrated of magnetic flux.Such arrangement, and owing to the geometric improvement that histological structure provided at brushless rotary motor, make under the situation that does not as far as possible additionally increase space and weight is considered, obtain the high efficiency of brushless rotary motor, high output torque and the further improvement of the running characteristic of safety flexibly.
Moreover brushless rotary motor of the present invention is applicable to efficient power generator, motor, can be used for driving the engine of special device, as electric wheelchair, electric bicycle, electric automobile or the like.
Description of drawings
Fig. 1 is the three-dimensional exploded view of first embodiment of the invention brushless rotary motor;
Fig. 2 is the constitutional diagram of first embodiment of the invention brushless rotary motor;
Fig. 3 is the A-A cutaway view of Fig. 2;
Fig. 4 is the part three-dimensional exploded view of the stator combination figure of first embodiment of the invention brushless rotary motor;
Fig. 5 is the constitutional diagram of the part three-dimensional exploded view of Fig. 4 structure brushless rotary motor stator;
Fig. 6 is the B-B cutaway view of Fig. 2;
Fig. 7 is a second embodiment of the invention, is analogous to the structure cutaway view of a change of Fig. 6 cutaway view;
Fig. 8 is a third embodiment of the invention, is analogous to the structure cutaway view of a change of Fig. 6 cutaway view;
Fig. 9 is the schematic diagram of the rotor side surface part of third embodiment of the invention.
Embodiment
As shown in Figure 1, be the three-dimensional exploded view of the brushless rotary motor of first embodiment of the invention, in order to forming member among the explanation embodiment.Brushless rotary motor of the present invention contains a stator and a rotor.Contain a plurality of magnetic elements that contain permanent magnet on the rotor, each magnetic element has the general c-shaped approximately connecting support 55 that forms with magnetic conductive material, and the inner surface at the C of each magnetic element shape connecting support 55 is mounted with two permanent magnets that take the shape of the letter U approximately 51,52, to form two magnetic poles of magnetic element; And the side of the C shape connecting support 55 of each magnetic element back of the body combines with groove 81b on the rotor fixed disk 81, make a plurality of magnetic elements that contain permanent magnet be configured to constitute rotor colyliform ring round the circumferencial direction of rotating shaft, then one of them combines rotor fixed disk 81 with rotor disk 80; Rotor outer ring 83 combines with fixed axis 74 in conjunction with the rotor disk 80 of two sides and via bearing.Contain a plurality of electromagnet members on the stator, each electromagnet member has the paired utmost point 60 with the core connection of magnetic conductivity, and has a coil 65 to form on the core; The affixed plate 611,612 that forms with the non-magnetic material combines with a plurality of electromagnet members, makes a plurality of electromagnet members be configured to form stator colyliform ring round the circumferencial direction of rotating shaft; The cross section of each utmost point of each electromagnet member's the paired utmost point 60 takes the shape of the letter U separately approximately, and the bottom pole-face in three pole-faces in the U-shaped cross-section outside is generally towards radially, make between rotor and the stator, there are two radial air gaps to be positioned on the stator opposite two sides radially, and two other pole-face of the U-shaped utmost point is respectively towards separately axial air-gap, and, 601 conducts of stator fixed leg that the non-magnetic material forms are to an affixed framework of stator colyliform ring, with via interior affixed plate 612 in conjunction with the electromagnet member to stator fixed disk 82.Stator fixed disk 82 directly is solidly connected to fixed axis 74.At this, stator colyliform ring is centered on by rotor colyliform ring to small part and comprises, thereby, at two radial air gaps between definition rotor and stator on the two sides radially of rotor; And the while defines the axial air-gap between rotor and stator respectively on the axial two sides of each magnetic pole of each magnetic element of rotor.
Fig. 2 is the constitutional diagram of the brushless rotary motor of first embodiment, can be suitable for wheel with the driving as means of transportation.
As shown in Figure 3, for first embodiment of the invention to illustrate Fig. 2 brushless rotary motor along the resulting cutaway view of line A-A.In rotor outer ring 83, the connecting support 55 of each magnetic element of rotor is combined with permanent magnet 51 and following permanent magnet 52; And stator electromagnet member is contained the paired utmost point 60 with core 63 connections of a magnetic conductivity; And in radial direction, the two poles of the earth 61,62 of stator electromagnet member's the paired utmost point 60 are corresponding separately across two permanent magnet magnetic poles 51,52 of separately radial air gap 21,22 and rotor magnetic component respectively; And there is a coil 65 on stator electromagnet member's core, to form.At this, a plurality of electromagnet members of stator form stator colyliform ring round the circumferencial direction of rotating shaft 74, and center on to the rotor colyliform ring that small part is constituted by a plurality of magnetic elements and to comprise; And two radial air gaps of radial air gap 21, following radial air gap 22 are to separate on the radial direction of rotor colyliform ring and stator colyliform ring has.And the gap 32 between the magnetic element that adjoins round the circumferencial direction of rotating shaft does not need identical so that with suitable the cooperating of the element on the stator, reach required smooth-going running.
As shown in Figure 4, be the part three-dimensional exploded view of the stator combination figure of first embodiment of the invention brushless rotary motor.Each U-shaped utmost point 61,62 of the paired utmost point 60 of stator electromagnet member can provide a big relatively air gap surface long-pending, and the volume of brushless rotary motor structure is reduced, and obtains more high efficiency brushless rotary motor; And the two sides pole-face of each U-shaped utmost point is axial correspondence approximately.And each utmost point 61,62 of stator electromagnet member has 4 grooves separately; Each U-shaped utmost point has two groove 611b at two of a side of the U-shaped utmost point opposite ends, and two groove 612b in addition are then at two of another side of the U-shaped utmost point opposite ends.Each have a protuberance 611a, 612a on two radial side of the affixed plate 611,612 that forms with the non-magnetic material, present by narrow to wide variation, and outside broad is in, and to combine with the main body of protuberance 611a, 612a at interior narrower place, and the main body of each affixed plate 611,612 can form the composition of two same parts separately, each parts is for becoming the strip lamellar body of isocentric circular arc approximately, with axial combination, and two radial side in the junction are connected with aforesaid protuberance 611a, 612a separately with the end of two identical strip sheet body components; Can be used as the two adjacent mutual combinations of affixed plate as for hole 611c, 612c, thereby make a plurality of affixed plates adjacent to make up conglobate ring.Two protuberance 611a radially on the affixed plate 611 and stator electromagnet member's the radially two groove 611b that extremely go up agree with, in addition the two protuberance 612a radially on the affixed plate 612 of side then with stator electromagnet member's the side in addition that extremely goes up radially two groove 612b agree with.Thereby, affixed plate 611 and 612 both in fact can be identical.In the drawings, 601 of stator fixed legs have in conjunction with the function of stator colyliform ring to the stator fixed disk, hole 601c1 on the fixed leg 601 combines with hole 612c on the affixed plate 612 by traditional fixed form, and solid locking element 601a demonstration combines with the stator fixed disk by hole 601c2 in the drawings as illustration.In fact, even the affixed plate 611 in this structure does not exist, can't be different to the operation of brushless rotary motor.
By electromagnet member's the groove 611b, the 612b that extremely go up and the protuberance 611a on the affixed plate 611,612, the fluid-tight engagement of 612a, adjacent with a plurality of affixed plate 611,612 that the non-magnetic material forms to cooperate a plurality of electromagnet members, make a plurality of electromagnet members be configured to form stator colyliform ring round the circumferencial direction of rotating shaft.As shown in Figure 5, be the constitutional diagram of Fig. 4, the electromagnet member who adjoins in track ring separates with pole clearance 33, makes each electromagnet member not have the contact of ferromagnetism each other, thereby the electromagnet member who adjoins has the isolation of magnetic, and the magnetic flux that produces moment can be concentrated.The stator electromagnet member's that each adjoins pole clearance 33 does not need identical, so that the epitrochanterian element of suitable cooperation, the arrangement through suitable reduces the torque pulsation of brushless rotary motor, reaches required smooth-going running.
As shown in Figure 6, be phantom along the resulting brushless rotary motor structure of the line B-B of Fig. 2.The first half of C shape connecting support 55 inner surfaces of each magnetic element of rotor combines with the backside surface of a U-shaped permanent magnet 51, and the Lower Half of C shape connecting support 55 inner surfaces of same magnetic element, then be combined with opposite polarity another U-shaped permanent magnet 52 of Surface field, make each c-shaped approximately magnetic element have two opposite magnetic poles 51,52 of magnetic pole pole-face polarity of the magnetic field.The permanent magnet of each magnetic pole of magnetic element has the thin bipolarity permanent magnet of U-shaped pole-face, and the U-shaped pole-face of each permanent magnet only demonstrates a single pole polarity, and opposite with the pole polarity of the U-shaped backside surface of the permanent magnet of the inner surface that is bonded to C shape connecting support 55.The side of the C shape connecting support 55 of each magnetic element back of the body combines with groove on the rotor fixed disk 81, and then one of them combines rotor fixed disk 81 with rotor disk 80; Rotor outer ring 83 in conjunction with the rotor disk 80 of two sides to combine with fixed axis via bearing.The C shape connecting support 55 of the magnetic element made from magnetic conductive material, for two U-shaped permanent magnets on the C shape connecting support 55 that is placed in magnetic element, the magnetic flux return path that it can be used as two U-shaped permanent magnets of magnetic element magnetic pole makes the end of flux concentrating at two U-shaped permanent magnets of magnetic element magnetic pole.On the rotor among Fig. 3, a plurality of magnetic elements that contain permanent magnet are configured to constitute a colyliform ring around the circumferencial direction of rotating shaft, and the permanent magnet that adjoins round the circumferencial direction of rotating shaft is with the continuous alternate configurations of pole polarity N/S.Polarity of the magnetic field N, the S that is indicated among the figure just for as the magnetic pole pole-face towards the illustrating of the polarity of the magnetic field of air gap, be not construed as limiting.
Among Fig. 6, each electromagnet member of stator is contained the paired utmost point 60 that connects with core 63, and the U-shaped separately of each utmost point 61,62 of the utmost point outside has three pole-faces separately in pairs, and have a coil 65 on electromagnet member's core 63, to form, to form stator electromagnet member as shown in Figure 6; Two side pole-faces in three pole-faces of each U-shaped utmost point are towards separately axial air-gap, and the bottom pole-face towards radial air gap one of them.Thereby three pole-faces of the last U-shaped permanent magnet magnetic pole 51 of each magnetic element first half of rotor are across a radial air gap 21 and two axial air- gap 21a, 21b, with with three pole-face effects of the utmost point 61 of the paired utmost point 60 of electromagnet member of stator, and three pole-faces of the following U-shaped permanent magnet magnetic pole 52 of the Lower Half of same magnetic element are then across a radial air gap 22 and two axial air- gap 22a, 22b, with three pole-face effects of another utmost point 62 of the paired utmost point 60 of electromagnet member.Stator fixed leg 601 combines with affixed plate 612 as shown in Figure 6 in a conventional manner, with affixed electromagnet member to stator fixed disk 82.The selection of non-magnetic material can be aluminium or other non-magnetic materials, makes the stator electromagnet member not have the contact of ferromagnetism each other.Thereby in actual operation, each electromagnet member of the stator of described brushless rotary motor forms a magnetic flux path independently separately, isolates in this electromagnet member's magnetic conductivity and can reduce stray flux loss and edge effect.In addition, the made that two utmost points 61,62 of electromagnet member's core 63 and the utmost point in pairs all can magnetic conductivity is as Fe, SiFe, SiFeP, SiFeCo ... or the like.
Each electromagnet member's of stator coil 65 have separately switch with respectively separately by excitatory, when coil in addition during current excitation, the pole-face separately at the paired utmost point of electromagnet member the two poles of the earth produces opposite polarity of the magnetic field N, S.But when the sense of current in the coil 65 is reversed, then can make polarity of the magnetic field N, the S of the two poles of the earth pole-face of electromagnet member's the paired utmost point reverse thereupon.The stator electromagnet member's that these are excitatory respectively separately paired magnetic pole is separated around the rotor permanent magnet magnetic pole that comprises by the radial air gap of being faced 21,22 and axial air- gap 21a, 21b, 22a, 22b and with it.The excitatory switch of this coil 65 can reach with the commutation circuit of mechanical commutator or electronic type, and the commutation circuit of electronic type must break the electronics commutation circuit corresponding to the response of the sensing signal of location aware device.In the running, each electromagnet member on the stator all can be considered as independently single separately individuality respectively, the relative position of stator that is predicted according to the location aware device respectively and rotor is with as reaction separately, determine the excitatory control on the coil own rightly, with the variation of the magnetic field size of controlling the paired utmost point pole-face of each electromagnet member respectively with the polarity of the magnetic field direction.Thereby, coil on each electromagnet member decides excitatory according to the relative position between stator and rotor separately, go up the excitatory magnetization that causes the electromagnet member of coil as the electromagnet member, the magnetic flux that this coil excitation caused is crossed air gap and is produced magnetomotive force, reciprocal effect with the mutual intercropping electromagnetism of corresponding permanent magnet magnetic pole of epitrochanterian respective magnetic element, make in the suitable time, produce suitable gravitation or repulsion, so that the rotation of wanting to be provided.At this, by the mutual separation of stator electromagnet member's magnetic flux path, to handle the adverse effect of the magnetic interference effect between two coils that adjoin.
As shown in Figure 7, it is the second embodiment of the present invention, is analogous to the structure cutaway view of a change of the cutaway view in Fig. 6 structure.Illustration in each figure of the present invention, the part that changes for element adopts the figure number that changes to indicate; And the identical part of element adopts identical figure number to indicate, and makes the change that is easy to understand between each embodiment of the present invention.Second embodiment is the preparation of permanent magnet for convenience, the change that the structure of Fig. 6 brushless rotary motor is done; Among Fig. 6 on two of the C shape connecting support inner surface of magnetic element U-shaped permanent magnet 51 and 52 substituted with three permanent magnet 53a, 53b, 53b and 54a, 54b, 54b separately. Permanent magnet 53a and 54a be placed in C shape connecting support inboard with the magnetic pole pole-face towards separately radial air gap 21,22; Permanent magnet 53b, 53b and 54b, 54b then be placed in separately C shape connecting support inboard on axial surface, with the magnetic pole pole-face respectively towards separately axial air- gap 21a, 21b and 22a, 22b.Three permanent magnets of each magnetic pole all are the bipolarity permanent magnet that approaches separately and have smooth surface, and each permanent magnet pole-face only demonstrates a single pole polarity, and opposite with the polarity of permanent magnet backside surface; Thereby, three permanent magnet magnetic pole pole-faces that adjoin mutually of each half one of the C shape connecting support inboard of same magnetic element have identical polarity of the magnetic field, feasible generation is passed the magnetic flux of air gap and can be assisted mutually, and the polarity of the magnetic field that has with three permanent magnets that adjoin mutually of another half one is opposite.Polarity of the magnetic field N, the S that is indicated among Fig. 7 just for as illustrating to illustrate the polarity of permanent magnet magnetic pole, is not construed as limiting.
Though rotor magnetic component and stator electromagnet member's given number is illustrated among the figure, the present invention when specialize realizing, the number of rotor magnetic component and stator electromagnet member's number can be identical also can be different so that meet the requirement of design.And stator electromagnet member's the coil flattening of can trying one's best, make electromagnet member's the paired utmost point pass air gap with two permanent-magnet poles of rotor magnetic component when corresponding, because of adverse effect that geometric imbalance produced can reduce to minimum, and obtain the ability of controlling flexibly.In addition, no matter be for stator or rotor for any one, the size of its element also can enable the simplification that helps making separately with normalized manufacturing.Brushless rotary motor of the present invention in fact also makes brushless rotary motor be easy to make except bigger output, more high-octane efficient can be provided.
As shown in Figure 8, be third embodiment of the invention, be analogous to the structure cutaway view of a change of the cutaway view among Fig. 6.Among Fig. 8, in the extension of the radial direction of U-shaped permanent magnet two sides separately of each magnetic element, there are the ambipolar extension permanent magnet 59 of extra strip, 59a to settle.
As shown in Figure 9, be third embodiment of the invention rotor side surface schematic diagram partly.The U-shaped permanent magnet 51,52 of the rotor of the 3rd embodiment brushless rotary motor launches with circumferencial direction towards the side of axial air-gap, as the auxiliary signal of Fig. 8.The U-shaped permanent magnet that magnetic element adjoins at circumferencial direction is separated with gap 32, and U-shaped permanent magnet 51,52 combines with C shape connecting support 55, and is limit in rotor outer ring 83 by circle.The polarity of the magnetic field direction of the extension permanent magnet 59 among Fig. 8 is presented among Fig. 9, is the circumferencial direction round rotating shaft, and polarity of the magnetic field N, the S that is indicated among the figure just for as illustrating, is not construed as limiting.Can exist the gap between the extension permanent magnet 59 that adjoins around the circumferencial direction of rotating shaft, not need tight connection as shown in FIG..Settle extra permanent magnet 59,59a two sides of the U-shaped permanent magnet 51,52 of each magnetic element axially between the space; And extra extension permanent magnet 59,59a have round the direction of the pole polarity of the circumferencial direction of rotating shaft.This arrangement provides a kind of more concentrated magnetic flux distribution.
Further improve, in the third embodiment of the present invention, the rotor of brushless rotary motor is except adding extra permanent magnet; On rotor, rotor fixed disk 81 and rotor outer ring 83 also can be formed by the material of non-magnetic, make permanent magnet that the circumferencial direction around rotating shaft adjoins each other not only with separated and there is not the contact of ferromagnetism each other.Therefore, provide magnetic flux distribution more smooth on rotor magnetic pole; Make and concentrated, the utilization as far as possible of magnetic flux and reaching of the conversion disturbing effect that reduces magnetic flux as far as possible of magnetic flux when high torque is exported, provide the running of high efficiency brushless rotary motor with acquisition.
When actual implementation is executed, have especially what is more, a plurality of brushless rotary motors of the embodiment of the invention can be provided the increase of output in the mode of axial serial connection; Or a plurality of brushless rotary motors are increased the supply of output in the mode of axial expansion.
In aforesaid all embodiment, the C shape connecting support of brushless rotary motor part certainly also can be fully formed by the material of non-magnetic, though can adverse effect be arranged to magnetic flux concentrated, but the running control to brushless rotary motor there is no difference, still can obtain the available running of brushless rotary motor.
Aforesaid various implementation form is to illustrate of the present inventionly as illustration, but the present invention is not subjected to the restriction of these examples.Though of the present invention be illustrated as one interior stator via a rotor encirclement outside around, these structures also can be inverted, to such an extent as to rotor by the stator encirclement around.In this is open, only show and a spot of illustrations more miscellaneous of description the present invention.The present invention can be applied in other combinations miscellaneous and the environment, and can be in change or the correction in being no more than the concept and range of the present invention that is similar to above-mentioned explanation.

Claims (13)

1, a kind of brushless rotary motor is characterized in that it includes:
A rotor contain a plurality of magnetic elements that contain permanent magnet that are configured to constitute a colyliform ring around the circumferencial direction of rotating shaft, and each magnetic element has two magnetic poles separately;
A stator, constituting a colyliform ring, and each electromagnet member is contained the paired utmost point to the electromagnet member of containing a plurality of magnetic isolation that are arranged coaxial around rotating shaft; And stator colyliform ring have at least part by rotor colyliform ring institute around encirclement, in addition, at rotor cover to two radial air gaps between definition rotor and the stator on the two sides radially; At this, one of them is corresponding with two magnetic poles of rotor magnetic component separately for each utmost point of stator electromagnet member's the paired utmost point, with radial air gap of respective poles definition and two the axial corresponding air gaps in two magnetic poles of each utmost point of electromagnet member and magnetic element.
2, brushless rotary motor as claimed in claim 1, it is characterized in that: each electromagnet member's of described stator the paired utmost point connects with the core of magnetic conductivity, and each utmost point of the utmost point each has three pole-faces in pairs, and there is a coil on electromagnet member's core, to form, when coil in addition during current excitation, pole-face separately produces opposite polarity of the magnetic field at the two poles of the earth of the paired utmost point of electromagnet member, and the polarity of the magnetic field that three pole-faces that make each utmost point produce is identical, and when the current reversal passed through in the coil, the polarity of the magnetic field of the two poles of the earth pole-face of the utmost point also reverses thereupon in pairs.
3, brushless rotary motor as claimed in claim 2, it is characterized in that: the cross section of each utmost point of each electromagnet member's of described stator the paired utmost point takes the shape of the letter U separately approximately, towards one of this two radial air gap, two other pole-face of this U type pole-face is then towards separately axial air-gap with pole-face for bottom pole-face in three pole-faces in the U-shaped cross-section outside.
4, brushless rotary motor as claimed in claim 2, it is characterized in that: the structure that each electromagnet member of described stator forms via the non-magnetic material separately is fixed to respectively on the stator, makes each electromagnet member of stator not have the contact of ferromagnetism each other.
5, brushless rotary motor as claimed in claim 2 is characterized in that: each magnetic pole pole-face of two magnetic poles of described each magnetic element of rotor only demonstrates a single polarity of the magnetic field, and opposite with the polarity of the magnetic field of another magnetic pole pole-face.
6, brushless rotary motor as claimed in claim 5 is characterized in that: described each magnetic element that contains permanent magnet has the c-shaped approximately connecting support that forms with magnetic conductive material; And there are a plurality of permanent magnets to be placed in the inner surface of the C shape connecting support of each magnetic element, to form two magnetic poles of magnetic element; Each magnetic pole of magnetic element has three pole surface that polarity of the magnetic field is identical separately, three pole-faces of each magnetic pole be parallel to the rotating shaft pole-face towards radial air gap one of them, two other pole-face is then towards separately axial air-gap; The pole-face of each magnetic pole of magnetic element interacts across the corresponding pole-face of the corresponding utmost point of the air gap of facing separately and the paired utmost point of stator separately; And each permanent magnet that forms the magnetic element magnetic pole only demonstrates a single polarity of the magnetic field on the surface towards air gap, and opposite with the polarity of the magnetic field of the permanent magnet backside surface of the connecting support inner surface that is bonded to magnetic element.
7, brushless rotary motor as claimed in claim 6 is characterized in that: each magnetic pole of described magnetic element each has three bipolarity permanent magnets to form three pole-faces of magnetic pole.
8, brushless rotary motor as claimed in claim 6, it is characterized in that: the permanent magnet of each magnetic pole of described magnetic element has the cross section that takes the shape of the letter U approximately, with three pole-faces of formation magnetic pole, and the bottom pole-face in three pole-faces of each U-shaped magnetic pole is parallel to rotating shaft.
9, brushless rotary motor as claimed in claim 6 is characterized in that: the permanent magnet on two magnetic poles of described each magnetic element is separated with radial clearance each other.
10, brushless rotary motor as claimed in claim 6, it is characterized in that: a plurality of permanent magnets of described rotor arrange around the circumferencial direction of rotating shaft adjoin permanent magnet along around the circumferencial direction of rotating shaft with pole polarity N and the continuous alternate configurations of S, and the permanent magnet that adjoins around the circumferencial direction of rotating shaft is each other with separated.
11, brushless rotary motor as claimed in claim 10 is characterized in that: the described permanent magnet that adjoins around the circumferencial direction of rotating shaft does not have the contact of ferromagnetism each other.
12, brushless rotary motor as claimed in claim 6 is characterized in that: the c-shaped approximately connecting support part of the magnetic element of described rotor can be formed by the material of non-magnetic.
13, brushless rotary motor as claimed in claim 9 is characterized in that: contain the radial clearance between two magnetic poles that extra permanent magnet is positioned at this magnetic element on the described rotor; And the magnetic direction that aforementioned extra permanent magnet has is the circumferencial direction around rotating shaft.
CNB2006100345676A 2006-03-21 2006-03-21 Brushless rotary motor Expired - Fee Related CN100508334C (en)

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CNB2006100345676A CN100508334C (en) 2006-03-21 2006-03-21 Brushless rotary motor

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Application Number Priority Date Filing Date Title
CNB2006100345676A CN100508334C (en) 2006-03-21 2006-03-21 Brushless rotary motor

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CN1845427A CN1845427A (en) 2006-10-11
CN100508334C true CN100508334C (en) 2009-07-01

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1949639A (en) * 2006-11-07 2007-04-18 联塑(杭州)机械有限公司 Radial series rotary electric machine
EP3657642B1 (en) 2018-11-26 2023-09-06 LG Electronics Inc. Motor
KR102099837B1 (en) * 2018-11-26 2020-04-10 엘지전자 주식회사 Motor
CN109945209A (en) * 2019-01-31 2019-06-28 北京航天国环技术有限公司 A kind of dangerous waste plasma processing method
CN111600405B (en) * 2019-02-21 2023-09-22 北京金风科创风电设备有限公司 Magnetic pole module, rotor, assembling method of rotor and motor

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