WO1999044273A1 - Elektromotor - Google Patents
Elektromotor Download PDFInfo
- Publication number
- WO1999044273A1 WO1999044273A1 PCT/DE1998/003238 DE9803238W WO9944273A1 WO 1999044273 A1 WO1999044273 A1 WO 1999044273A1 DE 9803238 W DE9803238 W DE 9803238W WO 9944273 A1 WO9944273 A1 WO 9944273A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electric motor
- motor according
- permanent magnet
- yoke
- segments
- Prior art date
Links
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
- H02K1/17—Stator cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
- H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
Definitions
- the invention relates to an electric motor according to the preamble of claim 1 and claim 14.
- An electric motor is already known (DE 26 37 705 AI), in which the magnetic yoke is formed from two half-shells, which are approximately in the middle of the Limit permanent magnet segments between them an air gap. Such air gaps weaken the cross-armature field, which reduces the efficiency of the electric motor.
- the electric motor according to the invention with the characterizing features of claim 1 and claim 14 has the advantage that, in addition to reducing the armature transverse field to improve the efficiency of the electric motor, the amount of material for the magnetic yoke is also reduced, thereby reducing the weight of the electric motor and the material costs be reduced.
- This advantage of the electric motor according to the invention is based on the knowledge that in order to conduct the magnetic field lines in the area of a plane of symmetry of the permanent magnet segments running through the longitudinal axis of the motor, a significantly smaller flux cross-section is required for the magnetic field lines is seen as seen in the circumferential direction between the permanent magnet segments.
- the magnetic yoke in the second region which is close to the plane of symmetry of the permanent magnet segments, has at least one recess which extends in the direction of the motor longitudinal axis and in the radial direction and which is, for example, trapezoidal, triangular, diamond-shaped, elongated, elliptical or similar. This reduces the amount of material and thus the weight in the second region of the inference and increases the resistance for the armature transverse field.
- the recess extends to an edge of the inference.
- the yoke in the radial direction in the first region near the end faces of the permanent magnet segments has a greater thickness than in the second region near the plane of symmetry of the permanent magnet segments and the yoke is bent as a ring or formed as a ring by deep drawing.
- the yoke consists of a pole housing and a yoke ring surrounding it, the permanent magnet segments being arranged in the pole housing and the yoke ring having the first and second regions. It is also advantageous if the yoke consists of a yoke ring and a pole housing surrounding it, the permanent magnet segments being arranged in the yoke ring and the yoke ring having the first and second regions.
- segment end faces in the case of return ring segments proceeding from a central plane running perpendicular to the longitudinal axis of the motor and symmetrically dividing the return ring segments with a distance that increases with respect to the plane of symmetry of the permanent magnet segments up to an edge of the return ring segments, the segment end faces being rectilinear or curved.
- segment end faces have an increasing distance from the plane of symmetry extending from a first edge to a second edge of the yoke ring segments in the direction of the motor longitudinal axis.
- segment end faces have an alternating increasing and decreasing distance from the plane of symmetry of the permanent magnet segments, extending from a first edge to a second edge of the yoke ring segments in the direction of the motor longitudinal axis.
- FIGS. 1 to 3 show a first exemplary embodiment of an electric motor with a yoke designed according to the invention
- FIGS. 4 and 5 6a and 6b show a third and a fourth embodiment of an inference formed according to the invention
- FIGS. 7 to 9 show a fifth embodiment of an inference formed according to the invention
- FIG. 10 shows a sixth embodiment of an inference designed according to the invention
- FIGS to 14 a seventh embodiment of an inference designed according to the invention
- FIGS. 17 and 18 a ninth embodiment of an inference formed according to the invention
- FIGS. 19 and 20 a tenth embodiment of an inference formed according to the invention
- FIGS. 21 to 45 different types of connection of pole housing and yoke ring segments.
- 1 denotes a magnetically conductive pole housing of a permanently magnetically excited direct current motor, which extends along a longitudinal axis 2 of the motor and, together with a magnetically conductive return ring 3 arranged on the pole housing 1, forms the magnetic return of the electric motor designed as a direct current motor.
- the yoke ring 3 sits tightly and without an air gap on the pole housing 1 and is either tightly bent as a sheet metal strip around the cylindrical wall of the pole housing 1 or pressed onto the pole housing 1 as a closed ring.
- FIG. 1 denotes a magnetically conductive pole housing of a permanently magnetically excited direct current motor, which extends along a longitudinal axis 2 of the motor and, together with a magnetically conductive return ring 3 arranged on the pole housing 1, forms the magnetic return of the electric motor designed as a direct current motor.
- the yoke ring 3 sits tightly and without an air gap on the pole housing 1 and is either tightly bent as a sheet metal strip around the cylindrical wall of the pole housing 1 or
- the pole housing 1 carries on its inner wall at least two permanent magnet segments 4, which run in a circular manner and in which is rotatably supported by means of a rotor shaft 7
- Drawing only schematically indicated armature 8 partially encompass circular cylindrical pole faces.
- the armature 8 is provided with a number of slots, not shown, for inserting an armature winding.
- the rotor shaft 7 is rotatably supported in end shields, not shown, which are formed, for example, by covers, not shown, which radially close the pole housing 1.
- FIG. 2 shows a top view of the electric motor according to FIG. 1.
- the yoke ring 3 is designed in one piece according to a first embodiment and is formed in a first region 13 near each end surface 14 of the permanent magnet segments 4 with a larger cross section for conducting magnetic field lines than in one second area 15 near a plane of symmetry 16 extending through the longitudinal axis 2 of the motor and the center of each permanent magnet segment 4.
- the end faces 14 of the permanent magnet segments 4 extend in the direction of the longitudinal axis 2 of the motor.
- the yoke ring 3 has a second area 15 Recess 19 extending in the direction of the longitudinal axis 2 of the motor and penetrating in the radial direction through the yoke ring 3, which is open towards the edge 9 or edge 10, that is to say extends to the edge 9 or 10.
- the recess 19 is trapezoidal and extends tapering both from the edge 9 and from the edge 10 to a web 20 in the yoke ring in each case - 6 -
- the recesses 19 and the web 20 are also symmetrical about a central plane 21 which runs perpendicular to the longitudinal axis 2 of the motor and symmetrically divides the yoke ring 3.
- the yoke ring 3 has four recesses 19, as is also the handling of the one-piece Yoke ring 3 in Figure 3 shows.
- the sheet metal strip shown in Figure 3 of the yoke ring 3 can, for. B. bent as a ring and butt-welded at its end faces 22 or connected by means of a dovetail connection, as shown in FIG. 8.
- the recesses 19 can also be triangular.
- FIG. 5 shows a section along the line VV in FIG. 4.
- at least one diamond-shaped recess 19 is provided, which is symmetrical to the plane of symmetry 16 of each of the permanent magnet segments 4.
- FIG. 4 shows, in a modification of the exemplary embodiment according to FIG. 4, a yoke ring 3 in a partial representation along the longitudinal axis 2 of the motor, wherein at least two trapezoidal recesses 19 or two triangular recesses 19 shown in broken lines are provided symmetrically to the plane of symmetry 16 and delimit a web 20 between them .
- a plurality of recesses 19 can be arranged alongside one another along the plane of symmetry 16, which neither intersect each other nor the edges 9 and 10 and end in front of the first region 13.
- FIG. 6b shows as a further variant of the exemplary embodiment according to FIG. 4 that the
- Recesses 19 can be formed as elongated or elliptical openings which are symmetrical and transverse to the plane of symmetry 16.
- a yoke ring 3 which is made of a strip material 24 produced with a variable thickness, for example a rolled steel strip or a plastic strip provided with magnetically conductive particles.
- the yoke ring 3 has first regions 13 which have a larger cross section, that is to say are thicker in the radial direction than second regions 15 which are thinner in the radial direction than the first regions 13.
- the width perpendicular to the central plane 21 of the band 24 remains the same.
- the circular yoke ring 3 bent from the band 24 according to FIG. 7 according to FIG. 8 is anchored in one another at its end faces 22, for example by welding or interlocking holding means, such as the dovetail-like holding means 25 shown in FIG FIG. 9 shows how the two permanent magnet segments 4 are arranged in the yoke ring 3 according to FIG. 8 such that the second regions 15 of smaller radial thickness are close to the plane of symmetry 16, while the first regions 13 of greater radial thickness are close to the
- End surfaces 14 of the permanent magnet segments 4 are provided.
- FIG. 10 it is shown how a deep-drawn yoke ring 3 is produced from the band 24, which has an alternating variable thickness, by means of a deep-drawing tool moved in the direction of the actuating arrow 26, the wall of which in radial direction corresponds to the chain-dotted line in accordance with the variable thickness of the band 24 with first thicker areas 13 and second thinner areas 15.
- FIG. 11 shows a yoke ring 3, which has two recesses 19 lying symmetrically to the plane of symmetry 16, which are arranged one behind the other in the direction of the motor longitudinal axis 2, the longitudinal axes of which are shown in FIG. 11
- Figure 12 shows a section along the line XII-XII in Figure 11 and Figure 13 shows the arrangement of such a yoke ring 3 within a
- FIG. 14 shows a top view of the exemplary embodiment according to FIG. 13, wherein the yoke ring 3, which is shorter in the direction of the motor longitudinal axis 2, is arranged inside the pole housing 1 and the permanent magnet segments 4 in the yoke ring 3.
- FIG. 15 shows a yoke ring 3 in a modification of the exemplary embodiment according to FIG.
- FIG. 16 shows a section along the line XVI -XVI in FIG. 15.
- FIG. 17 in a modification of the yoke ring according to FIG. 11, only a slot-shaped recess 19 is formed symmetrically to the plane of symmetry 16, which extends in its longitudinal extent along the longitudinal axis 2 of the motor and ends in each case before the edge 9 or the edge 10 is reached.
- FIG. 18 shows a section along the line XVIII-XVIII in FIG. 17.
- the recesses 19 are extended towards one another so far along the longitudinal axis 2 of the motor that they overlap, so that the return ring breaks down into two return ring segments 27 which are placed on the pole housing 1 and whose segment end faces 30 facing the plane of symmetry 16 run at a distance from one another which changes in the direction of the longitudinal axis 2 of the motor.
- the segment end faces 30 shown in solid lines in FIG. 19 the smallest distance from one another is reached on the central plane 21, while the distance to the edge 9 or edge 10 increases continuously due to the linear segment end faces 30 which are inclined to the motor longitudinal axis 2.
- FIG. 20 shows a top view of the exemplary embodiment according to FIG. 19 with the two
- Yoke ring segments 27 The tubular pole housing 1 shown in the figures can also be cup-shaped in a manner not shown.
- FIGS. 21 to 45 An arrangement is shown according to FIGS. 21 to 45, in which the yoke ring segment 27 is arranged on the pole housing 1. The same connection options naturally also apply to the reverse arrangement if the yoke ring segments 27 are arranged within the pole housing 1.
- Figures 21 to 25 show rivet connections, the rivets shown can also be designed as hollow rivets.
- Exemplary embodiments according to FIGS. 21 and 22 use rivets 31 with a semicircular head and a conical countersunk head, the countersunk head being accommodated in a conical bulge 32 of the pole housing 1 and the bulge 32 partially protruding into a conical depression 33 in the yoke ring segment 27, which at 22 is formed by an elevation 36 in the yoke ring segment 27. - 11 -
- a depression 37 is provided in the pole housing 1, in which a flat head is arranged in the exemplary embodiment according to FIG. 23 and a semicircular head of the rivet 31 is arranged in the exemplary embodiment according to FIGS. 23 and 24
- Yoke ring segment 27 abuts with a semicircular head.
- the rivets 31 penetrate through openings 38 in the pole housing 1 and in the yoke ring segment 27.
- through openings 38 are formed in the yoke ring segment 27, which are penetrated by rivets 31 pressed out of the material of the pole housing 1, on which rivets 31 are in the form of a direct riveting after the gripping
- a rivet element 39 bent out of the pole housing 1 extends through the through opening 38 of the
- FIG. 27 shows a top view of the exemplary embodiment according to FIG. 26 in the non-riveted state
- FIG. 28 shows the riveted state in which the rivet element 39 engages with force by means of a riveting tool
- FIG. 30 shows a rivet element 39 whose rivet head is deformed by means of notches 42 in such a way that parts of the rivet head overlap the yoke ring segment 27.
- FIG. 29 shows a top view of the exemplary embodiment according to FIG. 30 with the rivet head of the rivet element 39 deformed by the notches 42.
- Yoke ring segment 27 by means of welding, for example in the embodiment according to FIG. 31 by spot welding, point electrodes 43 being pressed onto the flat superposed parts of pole housing 1 and yoke ring segment 27 with a force F and the current applied to electrodes 43 due to the contact resistance causing the materials to point Melting brings.
- humps 44 for example, are pressed in on the yoke ring element 27 in the direction of the pole housing 1, which are heated and leveled by applying a force F and electrical current via the flat electrodes 43 to near the melting temperature.
- the so-called sonotrode 45 is used to connect the pole housing 1 and the yoke ring segment 27 by means of ultrasonic welding.
- FIG. 34 shows a pole housing 1 with a holding opening 48 widening away from the yoke ring segment 27, into which a cup-shaped holding element 49 is pressed by joining according to FIG. 35.
- FIGS. 36 to 45 show connection techniques between the pole housing 1 and the yoke ring segment 27 by means of bending elements, for example formed on the pole housing 1, in the form of tabs 50, for example, which pass through openings 38 in the yoke ring segment 27 and are then bent or folded.
- FIG. 36 shows a yoke ring segment 27 with a rectangular through opening 38, through which, according to FIG. 38, a tab 50 shown in more detail in FIG. 37 is inserted from a pole housing 1 and bent over the surface of the yoke ring segment 27.
- FIG. 39 shows the engagement of the tab 50 on the pole housing 1 through the - 13 -
- FIG. 40 shows the bent tab 50 lying on the surface of the yoke ring segment 27.
- FIG. 43 and FIG. 41 show the tab 50 of the pole housing 1 which extends through the through opening 38 of the yoke ring segment 27 and which is folded at its projecting end and thus partially overlaps the surface of the yoke ring segment 27.
- FIG. 42 shows a top view of the yoke ring segment 27 with the folded tab 50, which is T-shaped, as is also clearly shown in FIG. 41.
- the tab 50 is approximately in the form of a right-angled triangle and, in the entangled state, engages with a point over the surface of the yoke ring segment 27.
- the pole housing 1 and the yoke ring segment 27 can also be connected to one another by an adhesive 51 inserted between these two, which can be designed, for example, as a liquid adhesive or an adhesive film.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Dc Machiner (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98963332A EP1005713A1 (de) | 1998-02-28 | 1998-11-06 | Elektromotor |
KR19997009941A KR20010012126A (ko) | 1998-02-28 | 1998-11-06 | 전동모터 |
JP54301699A JP2001523440A (ja) | 1998-02-28 | 1998-11-06 | 電動モータ |
US09/403,934 US6191516B1 (en) | 1998-02-28 | 1998-11-06 | Electric motor |
BR9809012-7A BR9809012A (pt) | 1998-02-28 | 1998-11-06 | Motor elétrico |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19808550A DE19808550C1 (de) | 1998-02-28 | 1998-02-28 | Elektromotor |
DE19808550.8 | 1998-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999044273A1 true WO1999044273A1 (de) | 1999-09-02 |
Family
ID=7859258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/003238 WO1999044273A1 (de) | 1998-02-28 | 1998-11-06 | Elektromotor |
Country Status (8)
Country | Link |
---|---|
US (1) | US6191516B1 (de) |
EP (1) | EP1005713A1 (de) |
JP (1) | JP2001523440A (de) |
KR (1) | KR20010012126A (de) |
CN (1) | CN1091324C (de) |
BR (1) | BR9809012A (de) |
DE (2) | DE19808550C1 (de) |
WO (1) | WO1999044273A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6643911B2 (en) | 2000-09-13 | 2003-11-11 | Asmo, Co., Ltd. | Method of manufacturing yoke through multistage-drawing process |
US6701603B2 (en) | 2000-12-13 | 2004-03-09 | Asmo Co., Ltd. | Method of manufacturing yoke of electric rotating machine |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001080400A2 (en) * | 2000-04-19 | 2001-10-25 | Crumax Magnetics, Inc. | Permanent magnet stator assembly and method of manufacturing |
US6700269B2 (en) * | 2000-05-10 | 2004-03-02 | Asmo Co., Ltd. | Direct current motor yoke housing having groove-like reduced thickness portions |
DE10144652A1 (de) * | 2000-09-12 | 2002-06-13 | Denso Corp | Verfahren zur Herstellung eines Jochs für eine Drehfeldmaschine |
US6903475B2 (en) * | 2001-02-23 | 2005-06-07 | Black & Decker Inc. | Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing |
US7038343B2 (en) * | 2002-02-22 | 2006-05-02 | Black & Decker Inc. | Field assembly for a motor and method of making same |
JP3953923B2 (ja) * | 2002-09-17 | 2007-08-08 | カルソニックカンセイ株式会社 | 電動モータ及び電動モータの製造方法 |
US6844645B2 (en) * | 2002-11-08 | 2005-01-18 | Wavecrest Laboratories, Llc | Permanent magnet motor rotor having magnetic permeable material for enhanced flux distribution |
DE50306284D1 (de) * | 2003-09-05 | 2007-02-22 | Kress Elek K Gmbh & Co Elektro | Elektromotor mit einem rückschlussring |
JP2005229680A (ja) * | 2004-02-10 | 2005-08-25 | Mitsumi Electric Co Ltd | モータケース |
DE102005035146A1 (de) * | 2005-07-27 | 2007-02-08 | Scheuermann & Heilig Gmbh | Gehäuse für eine elektrische Kleinmaschine |
US7385324B2 (en) * | 2006-01-17 | 2008-06-10 | Lily Lin | Magnetic control wheel with a magnetic ring |
DE102006004608B4 (de) * | 2006-02-01 | 2007-12-27 | Siemens Ag | Elektrische Maschine |
CN101379676A (zh) | 2006-02-01 | 2009-03-04 | 欧陆汽车有限责任公司 | 电机 |
DE102006045355A1 (de) * | 2006-09-26 | 2008-04-03 | Robert Bosch Gmbh | Stator in einem Elektromotor |
US8927894B2 (en) * | 2006-09-28 | 2015-01-06 | GM Global Technology Operations LLC | Weld electrode for attractive weld appearance |
DE102006060305A1 (de) * | 2006-12-20 | 2008-06-26 | Robert Bosch Gmbh | Stator in einem Elektromotor |
US8040005B2 (en) * | 2008-02-08 | 2011-10-18 | Robert Bosch Gmbh | Plastic pole housing for an electric motor |
FR2986918B1 (fr) * | 2012-02-09 | 2014-11-21 | Valeo Systemes Dessuyage | Enceinte de moteur electrique et procede d'assemblage |
JP6316072B2 (ja) * | 2014-04-10 | 2018-04-25 | 株式会社ミツバ | モータのヨーク、減速機付きモータ、モータのヨークの製造方法、及びモータケーシングの製造方法 |
JP2019520030A (ja) * | 2016-05-04 | 2019-07-11 | ブローゼ・ファールツォイクタイレ・ゲーエムベーハー・ウント・コンパニ・コマンディットゲゼルシャフト・ヴュルツブルク | 磁極ハウジングの製作方法 |
JP2018143043A (ja) * | 2017-02-28 | 2018-09-13 | 日本電産株式会社 | モータ |
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1998
- 1998-02-28 DE DE19808550A patent/DE19808550C1/de not_active Expired - Fee Related
- 1998-02-28 DE DE19861024A patent/DE19861024A1/de not_active Ceased
- 1998-11-06 EP EP98963332A patent/EP1005713A1/de not_active Withdrawn
- 1998-11-06 WO PCT/DE1998/003238 patent/WO1999044273A1/de not_active Application Discontinuation
- 1998-11-06 JP JP54301699A patent/JP2001523440A/ja active Pending
- 1998-11-06 CN CN98804612A patent/CN1091324C/zh not_active Expired - Fee Related
- 1998-11-06 BR BR9809012-7A patent/BR9809012A/pt not_active IP Right Cessation
- 1998-11-06 KR KR19997009941A patent/KR20010012126A/ko not_active Application Discontinuation
- 1998-11-06 US US09/403,934 patent/US6191516B1/en not_active Expired - Lifetime
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6643911B2 (en) | 2000-09-13 | 2003-11-11 | Asmo, Co., Ltd. | Method of manufacturing yoke through multistage-drawing process |
US6701603B2 (en) | 2000-12-13 | 2004-03-09 | Asmo Co., Ltd. | Method of manufacturing yoke of electric rotating machine |
Also Published As
Publication number | Publication date |
---|---|
EP1005713A1 (de) | 2000-06-07 |
JP2001523440A (ja) | 2001-11-20 |
US6191516B1 (en) | 2001-02-20 |
DE19808550C1 (de) | 1999-07-29 |
DE19861024A1 (de) | 1999-09-09 |
BR9809012A (pt) | 2000-08-01 |
CN1091324C (zh) | 2002-09-18 |
KR20010012126A (ko) | 2001-02-15 |
CN1253670A (zh) | 2000-05-17 |
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