CN102273050A - Direct current motor - Google Patents
Direct current motor Download PDFInfo
- Publication number
- CN102273050A CN102273050A CN200980153849XA CN200980153849A CN102273050A CN 102273050 A CN102273050 A CN 102273050A CN 200980153849X A CN200980153849X A CN 200980153849XA CN 200980153849 A CN200980153849 A CN 200980153849A CN 102273050 A CN102273050 A CN 102273050A
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- CN
- China
- Prior art keywords
- permanent magnet
- rotor
- motor
- matrix
- section
- 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.)
- Pending
Links
- 230000005405 multipole Effects 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims description 22
- 230000005415 magnetization Effects 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a direct current motor comprising a stator for receiving a cavity of a rotor and a magnetic field creation device by means of which a rotating magnetic multi-pole field can be created. The direct current motor furthermore comprises a rotating-mounted shaft that bears said rotor and a base element connected to the shaft in a rotatably fixed manner, wherein said base element comprises a plurality of recesses. A plurality of permanent magnets are arranged in said recesses of said base element, wherein the shape of said recesses is complementary to the shape of said permanent magnets and said permanent magnets have at least one curved outside contour.
Description
The present invention relates to a kind of DC motor, this DC motor comprises stator and the magnetic field generation device with the cavity that is used to receive rotor, utilizes this magnetic field generation device can produce the rotation magnetic multipole field.This DC motor also comprises the axle and the matrix of rotatable arrangement in addition, and this axle supports described rotor, this matrix and antitorque connection of described axle, and wherein said matrix has a plurality of recesses.In the recess of described matrix, arrange a plurality of permanent magnets, the shape of wherein said recess and the shape complementarity of described permanent magnet.
Background technology
By the known a kind of motor of DE 19915664A1, has stator and by the folded rotor that constitutes of plate.Rotor has long recess at this, can use square permanent magnet in described recess, to produce magnetic multipole field.The magnetic field of rotor is connected to the rotating magnetic field of the solenoid generation that utilizes stator when moving this DC motor.Also can move the rotor in the rotation thus and produce torque.
For the rotating torques of high availability is provided, must provide the big field intensity in the air gap between rotor and the stator.Locate according to the outer surface of the as close as possible rotor of prior art permanent magnet for this reason.Have only elongate strip available thus on outer surface, this elongate strip is caught square permanent magnet with respect to the centripetal force of having an effect in rotor.Therefore the rotating speed that allows of the maximum by this braking force restrict rotor that can transmit.
From prior art, the technical problem to be solved in the present invention is to provide a kind of DC motor, and this DC motor can provide comparable torque and have the speed stability that improves with respect to prior art.
Summary of the invention
According to the present invention, this technical problem solves by a kind of DC motor, and this DC motor comprises stator and the magnetic field generation device with the cavity that is used to receive rotor, utilizes this magnetic field generation device can produce the rotation magnetic multipole field.The DC motor of this suggestion also comprises the axle of rotatable arrangement in addition, and this axle supports described rotor.This DC motor also comprises matrix, this matrix and antitorque connection of described axle, and wherein said matrix has a plurality of recesses.Arrange a plurality of permanent magnets in the recess of described matrix, shape and described permanent magnet that the shape of wherein said recess is replenished described permanent magnet have at least one crooked exterior contour.
According to the present invention as can be seen, utilize the arc-shaped permanent magnet of diametrical magnetization can realize the rotor geometry of improving, wherein the contact area of permanent magnet with bigger carrying is used for the surrounding rotor material.Can transmit bigger centripetal force thus, promote the speed stability of rotor thus.Simultaneously the rotor geometry of suggestion is suitable for providing almost unaltered magnetization in the air gap between rotor and the stator according to the present invention, thereby operational torque only reduces on a small quantity or even rises.
The permanent magnet of arc has the shape of circular in preferred implementation of the present invention, and wherein this circular especially preferably covers 1/3rd of wholecircle.Can cover the circular of wholecircle about 2/3rds thus by the mirror image symmetric arrangement of two permanent magnets, thus a magnetic pole piece of per two permanent magnet surrounding rotors.
When permanent magnet has the radially terminal of length b and the tangential terminal of length a, wherein the ratio between a and the b is approximately at 1 o'clock, produces the particularly advantageous manufacturability of permanent magnet then.At this, be understandable that to those skilled in the art usually not in strict conformity with this numerical value.Exactly, in the effect partially self adjustment at least that advantage occurs having according to the present invention under the situation of deviation.
The rotor of suggestion for example can be made by the plastics of filling by the pressure injection method according to the present invention.Especially preferably make the rotor of above-mentioned suggestion by a plurality of punch components, described punch components is passed through plate, particularly transformer board punching press by additional forming mould.A plurality of then pressed sheets for example by accurately compressing, are fixed on the direct current drive arbor to resisting torque, and to be approximately columniform plate folded as rotor matrix thereby form along the longitudinal length of axle.
Can use identical plate section for plate is folded in embodiments of the present invention.Longitudinal length along rotor forms constant cross section in this case.In improvement project of the present invention, can use two different plate sections at least, thereby cross section of rotor is non-constant along this longitudinal length.
Particularly preferably be the rib that has tangential intercell connector and/or radially extend according to plate cross section pressed sheet at this.Otherwise thus the field of rotor multipole fields form can the confining force of permanent magnet and so the expense of speed stability aspect be optimized and.Utilize this mode, perhaps can make microrunning DC motor, perhaps can make fast turn-around DC motor with low torque with relative high torque (HT).
Should not limit general inventive concept ground sets forth in detail the present invention according to embodiment and accompanying drawing below.Wherein:
Fig. 1 illustrates the cross section of the DC motor of suggestion according to the present invention,
Fig. 2 illustrates the partial face according to cross section of rotor of the present invention,
Fig. 3 illustrates the plate cross section that is used to make the pressed sheet that can use rotor matrix according to first embodiment,
Fig. 4 illustrates the plate cross section that is used to make the pressed sheet that can use rotor matrix according to second embodiment,
Fig. 5 illustrates the plate cross section that is used to make the pressed sheet that can use rotor matrix according to the 3rd embodiment,
Fig. 6 illustrates the plate cross section that is used to make the pressed sheet that can use rotor matrix according to the 4th embodiment,
Fig. 7 illustrates the cross section of permanent magnet used according to the invention.
Fig. 1 illustrates the DC motor according to the embodiment of the invention.This motor comprises stator 100 and rotor 200.Stator 100 comprises a plurality of pole shoes 115 that are separated from each other by slit 110.Stator has 12 slits 110 and 12 pole shoes 115 in the illustrated embodiment.Pole shoe 115 interconnects by yoke 140, with direct magnetic flux.Pole shoe 115 and yoke 140 can one be implemented in preferred embodiment.
Stator comprises having electric conductor separately in addition, for example 12 coils of the N of varnished insulation copper cash circle.These circles pass slit 110 in this part and extend.This coil is known and therefore not shown in the accompanying drawings to those skilled in the art.The coil of stator 100 utilizes the current cycle loading by unshowned switching device.Form magnetic multipole field in this way, the oriented phase of this magnetic multipole field is for stator 100 cyclic variations.This magnetic field is called rotating magnetic field in the context of the present invention.
At the geometry with 12 pole shoes 115 of these those skilled in the art shown in usually for example only selecting.Stator also can have more or a spot of pole shoes in other execution mode of the present invention.
Be embedded in permanent magnet 270 at rotor 200.Permanent magnet 270 has arc, particularly fan-shaped cross section at this.Permanent magnet 270 is connected to the magnetic multipole field of the rotation multipole fields of stator when being created in the operation DC motor equally.Rotor 200 rotates with the rotating magnetic field with stator in this way, and the effective torque of rotor 200 is provided thus.
Per two permanent magnets 270 surround a pole shoe 210.Pole shoe 210 is used to guide the multipole fields that produced by permanent magnet.Between 270 pairs of two permanent magnets that surround a pole shoe 210 separately, arrange a pole shoe 220.In order single-piece to finish pole shoe 220 and 210, these two pole shoes interconnect by bar 260 and rib 250.
Usually be understandable that to those skilled in the art the rotor of suggestion needn't all have 8 permanent magnets 270 in each execution mode of the present invention.According to geometry those skilled in the art of rotor pole shoe 210 with more or a spot of permanent magnets 270 and corresponding suitable quantity with it and another rotor geometry of 220 can be set.The present invention does not instruct and keeps the geometry shown in Fig. 1 as the solution principle.
Fig. 2 illustrates about 90 ° partial face of rotor shown in Figure 1.Should illustrate major advantage of the present invention according to Fig. 2.Fig. 2 is at two arc-shaped permanent magnets 270 shown in the cross section, and this permanent magnet part separately surrounds pole shoe 210.Pole shoe 210 by bar 260 be connected at the visible pole shoe 220 of intermediate pattern part.
Around rotation 120 rotors 200 time, radially outward quicken permanent magnet 270 by the centripetal force of effect.This cause permanent magnet 270 with its outer surface 275 to small part, in other words part surface 240 with 245 the zone in contact with the surperficial power transmission of pole shoe 220 with being connected.Pole shoe 220 is separated in the power that exerts an influence on the surface 240 and 245 by the tension stress in the bar 230.Bar 230 has the strength of materials that increases with respect to prior art at this, and this strength of materials allows the bigger power of transmission and therefore allows the higher rotating speed of rotor.Because magnetic flux is concentrated in pole shoe 210 and 220 zones, 230 pairs of the strengths of materials of increase obtainable magnetic field intensity air gap 130 in not have influence and therefore to not had by the available torque of rotor 200 generations to influence.
Matrix at preferred implementation rotor 200 of the present invention constitutes by plate is folded, the folded a plurality of pressed sheets arranged on the axle 120 that are included in of this plate.The plate cross section of pressed sheet shows the cross section of rotor 200 thus.Because only use identical plate folded for the matrix of constructing rotor 200, so rotor 200 has the constant cross-section along its longitudinal length.As long as use different pressed sheets, cross section of rotor changes along its longitudinal length.Can optimize the magnetic characteristic and the mechanical property of rotor in this way.The embodiment that is used for different pressed sheets illustrates as follows.
Fig. 3 illustrates first embodiment that is used for the pressed sheet of the rotor 200 of suggestion according to the present invention.The opening of a receiving axes 120 is set at the pressed sheet center.Plate cross section according to Fig. 3 has 4 pole shoes 120 in addition.These pole shoes are by two recess 300 and 305 restrictions that are provided for receiving permanent magnet 270 separately.Per two recesses 300 and 305 are separated from each other by rib 250.
The side that each leisure deviates from pole shoe 210 between two adjacent recesses 300 and 305 is arranged other pole shoe 220.Each pole shoe 210 is connected by the pole shoe 220 that bar 260 is adjacent.Make to plate cross section single-piece in this way with maximum stable.In this recess 300 and 305 profiles of replenishing permanent magnet 270, permanent magnet allows can tolerance given in advance importing in the recess in other words.For fixed permanent magnet can be provided with mould material or adhesive.In another embodiment of the present invention, can select recess 300 and 305 and the tolerance of the size of permanent magnet 270 like this, make permanent magnet 270 in opening 300 or 305, clamp.
Fig. 4 illustrates another constituted mode according to plate of the present invention cross section.Also have 4 pole shoes 210 that are connected with adjacent separately pole shoe 220 by bar 260 according to the plate cross section of Fig. 4.
Each pole shoe 210 is surrounded by opening 300.Opening 300 has fan shape, and this is fan-shaped to have about 240 ° angle of release.This means, in opening 300, can receive two permanent magnets with about one third sector shaped cross section.Lack rib 250 and can not disturb magnetic flux between opening 300 interior two adjacent permanent magnet 270.Can single-piece implement plate cross section by bar 260 according to Fig. 4.
Fig. 5 illustrates another execution mode that is used for according to the plate cross section of rotor 200 of the present invention.Plate cross section according to Fig. 5 also has a plurality of recesses 300 and 305, and these recesses are separated from each other by rib 250 separately.Rib 250 is connected pole shoe 210 on its basis with the basis of two adjacent pole shoes 220.In this way also can single-piece implement plate cross section according to Fig. 5.Although lack bar 260, have device side 240 and 245 according to the plate cross section of Fig. 5, these device side realize permanent magnet 270 and the transmission of the power between the pole shoe 220 in openings 300 and 305.Therefore, although lack bar 260, according to the confining force that the plate cross section of Fig. 5 can be implemented on permanent magnet 270 and centripetal force is oppositely arranged.
The 4th embodiment in plate cross section is shown in Figure 6.Plate cross section according to Fig. 6 is characterised in that, does not arrange rib 250 or bar 260 between pole shoe zone 210 and pole shoe zone 220.Can disturb the magnetic flux of the permanent magnet 270 that can in opening 300, arrange so as few as possible.
Yet the plate cross section according to Fig. 6 also is suitable for implementing confining force and keeping these permanent magnets under the high-revolving situation on its position in rotor 200 to permanent magnet 270 on device side 240 and 250.
Last Fig. 7 illustrates the cross section of permanent magnet 270.Permanent magnet 270 has fan-shaped basal plane.Therefore permanent magnet 270 has arc outer boundary 275, adjoins pole shoe 220 and device side 240 during the permanent magnet of this outer boundary in using rotor.Permanent magnet 270 also has arc inner boundary 274 in addition, and this inner boundary adjoins pole shoe 210 when inserting permanent magnet 270 in rotor 200.
The magnetization 271 of the permanent magnet 270 that illustrates is directed outwards radially.The pole shoe 220 that therefore magnetic flux pass rotor from surperficial 275s when inserting permanent magnet 270 in rotor according to the present invention extends to the pole shoe 115 of stator.Magnetic loop passes yoke 140 thus to adjacent pole shoe 115, passes air gap 130 thus to the pole shoe 210 of rotor and arrive inner surface 274 closures to magnet 270 thus.
Fan-shaped permanent magnet 270 preferably has 120 ° angle of release.Permanent magnet has the radially terminal of length b and the tangential terminal of length a in the execution mode shown in Figure 7, and the ratio of length a and length b is about 1: 1.This means that length a approximates length b greatly.The diametrical magnetization 271 shown in Fig. 7 is all supported in two kinds of measures.
Usually be understandable that the embodiment that the present invention is not limited to illustrate to those skilled in the art.Therefore this specification can not be regarded as determinate, but illustrative.
Claims (8)
1. DC motor comprises
-have and be used to receive the cavity of rotor (200) and the stator (100) of magnetic field generation device, utilize this magnetic field generation device can produce the rotation magnetic multipole field,
The axle of-rotatable arrangement (120), this axle supports described rotor (200),
-matrix, (120) are antitorque is connected for this matrix and described axle, and wherein said matrix has a plurality of recesses (300,305),
-a plurality of permanent magnets (270), described permanent magnet are arranged in the recess (300,305) of described matrix, the shape complementarity of the shape of wherein said recess (300,305) and described permanent magnet (270),
It is characterized in that,
-described permanent magnet (270) has at least one crooked exterior contour.
2. DC motor according to claim 1 is characterized in that, described permanent magnet (270) has the shape of circular.
3. DC motor according to claim 2 is characterized in that, described circular has about 110 ° and arrives about 130 ° opening.
4. according to claim 2 or 3 described DC motor, it is characterized in that described permanent magnet (270) has diametrical magnetization (271).
5. according to the described DC motor in one of claim 2 or 4, it is characterized in that described permanent magnet (270) has the radially terminal of length b and the tangential terminal of length a, wherein the ratio between a and the b is about 0.9 to about 1.1.
6. according to the described DC motor of one of claim 1-5, it is characterized in that described matrix is combined by the pressed sheet of a plurality of layerings, wherein said pressed sheet has at least two different plate cross sections.
7. DC motor according to claim 6 is characterized in that, the rib (250) that has tangential intercell connector (260) and/or radially extend according at least one pressed sheet of plate cross section.
8. according to the described DC motor of one of claim 1-7, it is characterized in that per two permanent magnets (270) are around a pole shoe (210).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910000028 DE102009000028A1 (en) | 2009-01-05 | 2009-01-05 | DC motor |
| DE102009000028.3 | 2009-01-05 | ||
| PCT/EP2009/067637 WO2010076256A1 (en) | 2009-01-05 | 2009-12-21 | Direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102273050A true CN102273050A (en) | 2011-12-07 |
Family
ID=42112250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980153849XA Pending CN102273050A (en) | 2009-01-05 | 2009-12-21 | Direct current motor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2384532A1 (en) |
| CN (1) | CN102273050A (en) |
| DE (1) | DE102009000028A1 (en) |
| WO (1) | WO2010076256A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104126266A (en) * | 2012-02-20 | 2014-10-29 | 利莱森玛电机公司 | Rotor of rotating machine with flux concentration |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013135257A2 (en) | 2012-03-13 | 2013-09-19 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft Würzburg | Electrical machine |
| CN106849542A (en) * | 2017-03-27 | 2017-06-13 | 郭智潮 | A kind of assembling structure of motor stator |
| CN110350694A (en) * | 2019-08-21 | 2019-10-18 | 苏州金莱克汽车电机有限公司 | A kind of low noise and the strong permanent magnet synchronous AC motor of fan-out capability |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960702669A (en) * | 1994-06-01 | 1996-04-27 | 야스가쿠 히데아키 | Permanent magnet rotor and its manufacturing method |
| DE19915664A1 (en) | 1999-04-07 | 2000-10-19 | Siemens Ag | Electrical machine with a stator |
| US6867526B2 (en) * | 2001-09-05 | 2005-03-15 | Koyo Seiko Co., Ltd. | Brushless DC motor |
| US20080258573A1 (en) * | 2005-03-11 | 2008-10-23 | Toyota Jidosha Kabushiki Kaisha | Rotor of Rotating Electric Machine, Rotating Electric Machine and Vehicle Drive Apparatus |
| JP5134846B2 (en) * | 2007-03-26 | 2013-01-30 | 株式会社東芝 | Permanent magnet motor drive system |
-
2009
- 2009-01-05 DE DE200910000028 patent/DE102009000028A1/en not_active Withdrawn
- 2009-12-21 CN CN200980153849XA patent/CN102273050A/en active Pending
- 2009-12-21 EP EP09795776A patent/EP2384532A1/en not_active Withdrawn
- 2009-12-21 WO PCT/EP2009/067637 patent/WO2010076256A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104126266A (en) * | 2012-02-20 | 2014-10-29 | 利莱森玛电机公司 | Rotor of rotating machine with flux concentration |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010076256A1 (en) | 2010-07-08 |
| DE102009000028A1 (en) | 2010-07-08 |
| EP2384532A1 (en) | 2011-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111207 |