WO1990004874A1 - Laminated stators for dynamo-electric machines - Google Patents
Laminated stators for dynamo-electric machines Download PDFInfo
- Publication number
- WO1990004874A1 WO1990004874A1 PCT/GB1989/001226 GB8901226W WO9004874A1 WO 1990004874 A1 WO1990004874 A1 WO 1990004874A1 GB 8901226 W GB8901226 W GB 8901226W WO 9004874 A1 WO9004874 A1 WO 9004874A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- yoke
- segments
- laminations
- pole piece
- stator
- 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.)
- Ceased
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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
Definitions
- This invention relates to dynamo-electric machines and particularly to a technique for the manufacture and assembly of a stator composed of a plurality of pairs of pole pieces and a yoke.
- tubular form may be octagonal, laminated pole pieces being keyed or otherwise affixed to the inside of each of the eight legs of the octagon. Normally there are two pairs of main pole pieces and four interpoles. However, other arrangements having a greater number of pairs of poles are possible.
- an electrical stator comprises a plurality of yoke segments each constituted by a respective stack of similar laminations and a plurality of pole pieces each constituted by a respective stack of similar laminations, the segments and pole pieces having complementary parts such that consecutive yoke segments interfit with and are coupled by a respective pole piece.
- the yoke segments define a yoke in the form of a polygonal figure.
- the segments may be coupled by respective pole pieces at corners of the polygon.
- the segments may be coupled by respective pole pieces disposed in the middle of alternate legs of the polygon. Such a construction maximizes the space available for winding round wire on the pole pieces.
- the yoke segments may each comprise a plurality of straight, parallel sided legs, the inner side of the segments being substantially complementary to the outer side thereof.
- Each pole piece may include a pair of inclined slots receiving a complementary terminal portion of a yoke segment and defining a dovetail part.
- the slots may be' parallel sided, and symmetrical with respect to a centre line of the respective pole piece.
- the invention also provides a method of making an electrical stator, comprising forming a multiplicity of first laminations each of which has the cross section of a yoke segment, forming a multiplicity of second laminations each of which corresponds to the cross section of the pole piece, forming the first and second laminations with complementary paths such that a pole piece lamination may act as a connector for two yoke laminations, constituting forming a plurality of yoke segments and a plurality of pole pieces from stacks of respective laminations, and connecting the yoke segments in a closed magnetic circuit by means of the pole pieces which alternate with the yoke segments.
- a particular pole piece lamination may comprise a tip portion having an arcuate edge, a shank portion having two generally parallel edges and a terminal portion including two opposite slots inclined symmetrically with respect to a centre line of the shank and inwardly from the terminal portion, the slots defining .a dovetail at the terminal portion.
- a particular yoke segment lamination may comprise a plurality of generally straight parallel sided leg portions, the two longer sides of the laminations being substantially complementary, and having near each end a recess defining a terminal portion which is parallel to, or symmetrically inclined relative to, the access of symmetry of the yoke segment lamination.
- Figure 1 is a plan view of part of a stator of an electric motor, the figure showing interfitting yoke laminations and pole piece laminations;
- FIG. 2 is a plan view of an alternative embodiment of the stator shown in Figure 1;
- Figure 3 shows in detail a pole piece according to the second embodiment of the invention.
- Figure 1 shows in plan or end view part of a stator, that is to say the yoke and pole pieces, of a four pole direct current motor.
- the stator 1 is laminated and in its completely assembled form consists of four non-interleaved stacks of yoke laminations 2, four non-interleaved stacks of main pole piece laminations 3 and, preferably, four non-interleaved stacks of interpole laminations 4.
- the interpoles and their manner of affixing to the yoke laminations 2 are not important to the present invention but they are described herein because it is usual, in order to aid commutation, to provide such intervals in a direct current machine.
- Each of the segmental yoke laminations 2 preferably comprises a plurality of legs (2a, 2b and 2c) which are preferably straight and are defined between an inner side 5 and an outer side 6, which are parallel and of matching shape throughout substantially the whole length of each segment.
- a dovetail groove 7 for engagement by the dovetail of an interpole 4.
- the dovetail groove is aligned, along a line 8 which is radial with respect to the axis of the stator, with a dovetail 9 on the outer side of the segment.
- This dovetail will, of course, form a dovetail ridge running lengthwise along the outside of the yoke and may be used for securing the yoke in a frame. It will be understood that preferably the dovetail groove 7 and the dovetail 9 are of corresponding form.
- an aperture 10 At a convenient location (or locations), but in this embodiment in the centre of the central portion 2b of each segmental lamination, there is an aperture 10. This aperture can be aligned with the corresponding apertures of the segments in the same stack of laminations and is used to receive a stake or peg for securing together the laminations in the stack.
- the yoke lamination 2 has end sides 11. It is convenient for these two sides to be parallel on each segmental lamination in order to facilitate the stamping of the laminations from a strip without wastage. At each end the yoke lamination ⁇ has a recess 12 with sides 13 and 14, as explained later.
- Each pole piece lamination has an inner curved side 15, which will form part of the pole face.
- the pole piece lamination has sides 16 and 17 which are preferably generally parallel.
- At its outer end the pole piece lamination is formed with a dovetail 18.
- This dovetail may carry an outer, smaller dovetail 19 which is used for affixing the yoke to a machine frame in a similar manner to that in which dovetail 9 is used.
- the - sides of the main dovetail correspond to and closely abut the sides 11 of adjacent laminations.
- each pole piece lamination is recessed adjacent the dovetail so that there is a slot 21 formed between each side of the dovetail and a respective triangular lip 22 of which one side is parallel to the confronting side of ' the dovetail, and of which the other side is a continuation of the side 16 or 17 of the pole piece lamination as the case may be.
- This lip 22 conforms to the recess 12 formed near the ends of each yoke lamination.
- This feature enables the yoke stack to be inserted in a pole piece stack by means of a simple radial movement.
- the interfitting of the pole pieces and the yoke segments resists movement of the yoke segments relative to the pole segment except in a radial outward direction.
- the sides of the dovetail on the pole piece laminations and the end sides of the yoke laminations are provided with small, mutually registering recesses 24 and 25 so as to define between respective adjacent sides the small circular hole 26. This hole may then receive a stack or peg which will act as a common detent for the adjacent pole pieces and yoke segments and thereby resist any outward movement of the assembled stator.
- Each pole piece lamination has a hole 27 which is used for pegging the stack of pole piece laminations together in the same manner as the hole 10 is used for the stack of yoke laminations.
- the pole pieces are provided at corners of the polygon formed by the yoke segments.
- the radial distance of the corners to the inner circular periphery of the pole pieces is thus at its greatest and accordingly the construction allows for the maximum length of shank on the pole pieces and thereby facilitates the use of round wire to the maximum number of turns.
- Figure 2 an alternative is shown in Figure 2.
- the description of Figure 2 is substantially the same as that of the embodiment of Figure 1 and will not be repeated.
- the essential difference of the embodiment of Figure 2 is that the pole pieces are provided in the middle of each side of the polygon formed by the yoke segments 6.
- FIG. 2 shows in detail, for greater clarity, a pole piece according to the second embodiment of the stator, as illustrated in Figure 2.
- a further advantage of the construction is that there is an absence of interleaving.
- the number of joints in the magnetic circuit of the yoke is minimal.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
An electrical stator (1) comprises a plurality of yoke segments constituted by a stack of similar laminations (2) and a plurality of pole pieces constituted by a stack of similar laminations (3). Segments and pole pieces have complementary parts such that consecutive yoke segments interfit with and are coupled by a respective pole piece. The yoke segments define a yoke in the form of a polygonal figure and in the preferred embodiment the stator (1) comprises four yoke segments and four pole piece segments. Each yoke segment comprises a plurality of straight parallel sided legs (2a, 2b, 2c), the inner side (5) of each segment being substantially complementary to the outer side (6) thereof. Each pole piece may include a pair of inclined slots (21) receiving complementary terminal portion (23) of a yoke segment and defining a dovetail part.
Description
LAMINATED STATORS FOR DYNAMO-ELECTRIC MACHINES
This invention relates to dynamo-electric machines and particularly to a technique for the manufacture and assembly of a stator composed of a plurality of pairs of pole pieces and a yoke.
It is known to make a laminated stator from laminar segments which are disposed in interleaved fashion so as to constitute a yoke which has a generally tubular form. In known practice the tubular form may be octagonal, laminated pole pieces being keyed or otherwise affixed to the inside of each of the eight legs of the octagon. Normally there are two pairs of main pole pieces and four interpoles. However, other arrangements having a greater number of pairs of poles are possible.
Manufacture by an interleaving technique can achieve a reasonably efficient utilisation of material, but assembly of the interleaved stacks of laminations is inconvenient and comparatively expensive, normally requiring welding.
Moreover, existing designs do not provide sufficient space for the convenient use of round wire for the field windings of the machine.
It is known to make yokes from circular laminations and to secure pole pieces of main poles and interpoles by means of drilling the yoke and employing threaded fittings. However there is poor utilization of material and the cost of assembly is comparatively high
It is a general object of the invention to provide a technique of making and assembling laminations for the laminated yoke and pole pieces of the dynamo-electric machine. It is a preferred object to provide a technique which is versatile and facilitates substantial economic savings in the manufacture of the motor as well as a general improvement in the construction and performance of the motor.
SUMMARY OF THE INVENTION
In one aspect of the invention an electrical stator comprises a plurality of yoke segments each constituted by a respective stack of similar laminations and a plurality of pole pieces each constituted by a respective stack of similar laminations, the segments and pole pieces having complementary parts such that consecutive yoke segments interfit with and are coupled by a respective pole piece.
Preferably the yoke segments define a yoke in the form of a polygonal figure. The segments may be coupled by respective pole pieces at corners of the polygon. Alternatively, the segments may be coupled by respective pole pieces disposed in the middle of alternate legs of the polygon. Such a construction maximizes the space available for winding round wire on the pole pieces.
The yoke segments may each comprise a plurality of straight, parallel sided legs, the inner side of the segments being substantially complementary to the outer side thereof.
Each pole piece may include a pair of inclined slots receiving a complementary terminal portion of a yoke segment and defining a dovetail part. The slots may be' parallel sided, and symmetrical with respect to a centre line of the respective pole piece.
The invention also provides a method of making an electrical stator, comprising forming a multiplicity of first laminations each of which has the cross section of a yoke segment, forming a multiplicity of second laminations each
of which corresponds to the cross section of the pole piece, forming the first and second laminations with complementary paths such that a pole piece lamination may act as a connector for two yoke laminations, constituting forming a plurality of yoke segments and a plurality of pole pieces from stacks of respective laminations, and connecting the yoke segments in a closed magnetic circuit by means of the pole pieces which alternate with the yoke segments.
A particular pole piece lamination may comprise a tip portion having an arcuate edge, a shank portion having two generally parallel edges and a terminal portion including two opposite slots inclined symmetrically with respect to a centre line of the shank and inwardly from the terminal portion, the slots defining .a dovetail at the terminal portion. A particular yoke segment lamination may comprise a plurality of generally straight parallel sided leg portions, the two longer sides of the laminations being substantially complementary, and having near each end a recess defining a terminal portion which is parallel to, or symmetrically inclined relative to, the access of symmetry of the yoke segment lamination.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a plan view of part of a stator of an electric motor, the figure showing interfitting yoke laminations and pole piece laminations;
Figure 2 is a plan view of an alternative embodiment of the stator shown in Figure 1; and
Figure 3 shows in detail a pole piece according to the second embodiment of the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figure 1 shows in plan or end view part of a stator, that is to say the yoke and pole pieces, of a four pole direct current motor. The stator 1 is laminated and in its completely assembled form consists of four non-interleaved stacks of yoke laminations 2, four non-interleaved stacks of main pole piece laminations 3 and, preferably, four non-interleaved stacks of interpole laminations 4. The interpoles and their manner of affixing to the yoke laminations 2 are not important to the present invention but they are described herein because it is usual, in order to aid commutation, to provide such intervals in a direct current machine.
Each of the segmental yoke laminations 2 preferably comprises a plurality of legs (2a, 2b and 2c) which are preferably straight and are defined between an inner side 5 and an outer side 6, which are parallel and of matching shape throughout substantially the whole length of each
segment. An advantage of making the segments in this way is that they can be cut without significant wastage from a strip of suitable metallic sheet.
On the inner side of the central part 2b of the stator segment 2 is a dovetail groove 7 for engagement by the dovetail of an interpole 4. The dovetail groove is aligned, along a line 8 which is radial with respect to the axis of the stator, with a dovetail 9 on the outer side of the segment. This dovetail will, of course, form a dovetail ridge running lengthwise along the outside of the yoke and may be used for securing the yoke in a frame. It will be understood that preferably the dovetail groove 7 and the dovetail 9 are of corresponding form.
At a convenient location (or locations), but in this embodiment in the centre of the central portion 2b of each segmental lamination, there is an aperture 10. This aperture can be aligned with the corresponding apertures of the segments in the same stack of laminations and is used to receive a stake or peg for securing together the laminations in the stack.
The yoke lamination 2 has end sides 11. It is convenient for these two sides to be parallel on each segmental lamination in order to facilitate the stamping of the laminations from a strip without wastage. At each end the yoke lamination^ has a recess 12 with sides 13 and 14, as explained later.
An important feature of the present invention is the disposition of the pole piece such that it fits between and couples two consecutive yoke segments. Each pole piece
lamination has an inner curved side 15, which will form part of the pole face. The pole piece lamination has sides 16 and 17 which are preferably generally parallel. At its outer end the pole piece lamination is formed with a dovetail 18. This dovetail may carry an outer, smaller dovetail 19 which is used for affixing the yoke to a machine frame in a similar manner to that in which dovetail 9 is used.
When the respective stacks of laminations are assembled, the - sides of the main dovetail correspond to and closely abut the sides 11 of adjacent laminations.
Preferably, each pole piece lamination is recessed adjacent the dovetail so that there is a slot 21 formed between each side of the dovetail and a respective triangular lip 22 of which one side is parallel to the confronting side of 'the dovetail, and of which the other side is a continuation of the side 16 or 17 of the pole piece lamination as the case may be. This lip 22 conforms to the recess 12 formed near the ends of each yoke lamination. The obliquity of the slot
21 is preferably parallel to the radial line 8 passing through the centre of the respective yoke lamination, the tab 23 formed between the recess and the end of the yoke lamination fitting into the slot 21.
This feature enables the yoke stack to be inserted in a pole piece stack by means of a simple radial movement. The interfitting of the pole pieces and the yoke segments resists movement of the yoke segments relative to the pole segment except in a radial outward direction. In order to resist this movement and secure the parts of the stator together, the sides of the dovetail on the pole piece
laminations and the end sides of the yoke laminations are provided with small, mutually registering recesses 24 and 25 so as to define between respective adjacent sides the small circular hole 26. This hole may then receive a stack or peg which will act as a common detent for the adjacent pole pieces and yoke segments and thereby resist any outward movement of the assembled stator.
Each pole piece lamination has a hole 27 which is used for pegging the stack of pole piece laminations together in the same manner as the hole 10 is used for the stack of yoke laminations.
In the embodiment shown in Figure 1, the pole pieces are provided at corners of the polygon formed by the yoke segments. The radial distance of the corners to the inner circular periphery of the pole pieces is thus at its greatest and accordingly the construction allows for the maximum length of shank on the pole pieces and thereby facilitates the use of round wire to the maximum number of turns. However, an alternative is shown in Figure 2. The description of Figure 2 is substantially the same as that of the embodiment of Figure 1 and will not be repeated. The essential difference of the embodiment of Figure 2 is that the pole pieces are provided in the middle of each side of the polygon formed by the yoke segments 6. Although the length of the shank on the pole piece is shorter in the embodiment of Figure 2, a right angle is defined between the side 16 or 17 of the shank and the respective yoke segment and accordingly it is easier to wind the round wire on the shank, and the winding may have a greater multiplicity of layers throughout the length of the shank than in the embodiment shown in Figure 1.
Figure 3 shows in detail, for greater clarity, a pole piece according to the second embodiment of the stator, as illustrated in Figure 2.
A further advantage of the construction is that there is an absence of interleaving. The number of joints in the magnetic circuit of the yoke is minimal.
Claims
1. An electrical stator comprising a plurality of yoke segments each constituted by a respective stack of similar laminations and a plurality of pole pieces each constituted by a respective stack of similar laminations, the segments and pole pieces having complementary parts such that consecutive yoke segments interfit with and are coupled by a respective pole piece.
2. A stator according to claim 1 in which the yoke segments define a yoke in "the form of a polygonal figure.
3. A stator according to claim 2 in which the segments are coupled by respective pole pieces at corners of the polygon.
4. A stator according to claim 2 in which the segments are coupled by respective pole pieces at the centre of each side of the polygon.
5. A stator according to any of claims 2 to 4 in which each lamina of the stator comprises four yoke segments and four pole piece segments.
6. A stator according to any of claims 2 to 5, in which the yoke segments each comprise a plurality of straight parallel sided legs, the inner side of each segment being substantially complementary to the outer side thereof.
7. A stator according to any foregoing claim in which each pole piece includes a pair of inclined slots defining a dovetail part, and each slot receiving a complementary terminal portion of a yoke segment.
8. A stator according to claim 7 in which the slots are parallel sided and symmetrical with respect to a centre line of the respective pole piece.
9. A method of making an electrical stator, comprising forming a multiplicity of first laminations each of which has the cross section of a yoke segment, forming . a multiplicity of second laminations each of which corresponds to the cross section of a pole piece, forming the first and second laminations with complementary parts such that a pole piece lamination may act as a connector for two yoke laminations, constituting forming a plurality of yoke segments and a plurality of pole pieces from stacks of respective laminations, and connecting the yoke segments in a closed magnetic circuit by means of the pole pieces which alternate with the yoke segments.
10. A pole piece lamination comprising a tip portion having an arcuate edge, a shank portion having two generally parallel edges, and a terminal portion including two opposite slots inclined symmetrically with respect to a centre line of the shank and inwardly from the terminal portions, defining a dovetail at the terminal portion.
11. A yoke segment lamination comprising a plurality of generally straight parallel sided leg portions, the two longer sides of the laminations being substantially complementary, and having near each end a recess defining a terminal portion which is parallel to the axis of symmetry of the yoke segment lamination.
12. A yoke segment lamination according to claim 11 in which the recess is substantially triangular.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB888825071A GB8825071D0 (en) | 1988-10-26 | 1988-10-26 | Laminated stators for dynamo electric machines |
| GB8825071.7 | 1988-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1990004874A1 true WO1990004874A1 (en) | 1990-05-03 |
Family
ID=10645829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1989/001226 Ceased WO1990004874A1 (en) | 1988-10-26 | 1989-10-17 | Laminated stators for dynamo-electric machines |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0394414A1 (en) |
| JP (1) | JPH03501919A (en) |
| GB (2) | GB8825071D0 (en) |
| WO (1) | WO1990004874A1 (en) |
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| WO1995012912A1 (en) * | 1993-11-01 | 1995-05-11 | Stridsberg Innovation Ab | An electric motor and its fabrication |
| DE19629383A1 (en) * | 1996-07-20 | 1998-01-22 | Aweco Kunststofftech Geraete | Stator lamination for fixed part of electric machine esp synchronous or asynchronous machine |
| WO1998029938A3 (en) * | 1996-12-30 | 1998-10-15 | Arcelik As | A high performance electric motor |
| DE102004029442A1 (en) * | 2004-06-18 | 2006-01-26 | Minebea Co., Ltd. | Stator system for an electric motor has a stator ring with radially and tangentially orientated ring segments arranged alternately |
| US7078843B2 (en) | 2003-09-05 | 2006-07-18 | Black & Decker Inc. | Field assemblies and methods of making same |
| US7146706B2 (en) | 2003-09-05 | 2006-12-12 | Black & Decker Inc. | Method of making an electric motor |
| US7205696B2 (en) | 2003-09-05 | 2007-04-17 | Black & Decker Inc. | Field assemblies having pole pieces with ends that decrease in width, and methods of making same |
| US7211920B2 (en) | 2003-09-05 | 2007-05-01 | Black & Decker Inc. | Field assemblies having pole pieces with axial lengths less than an axial length of a back iron portion and methods of making same |
| WO2008128659A3 (en) * | 2007-04-21 | 2008-12-11 | Bosch Gmbh Robert | Electric machine with teeth made of metal sheets |
| DE102009001588A1 (en) * | 2009-03-17 | 2010-09-23 | Hilti Aktiengesellschaft | Stator for an electrodynamic machine |
| WO2014074423A2 (en) | 2012-11-06 | 2014-05-15 | Russel Marvin | Compact permanent magnet machine construction |
| FR3121555A1 (en) * | 2021-04-06 | 2022-10-07 | Inteva Products, Llc. | STATOR FOR BRUSHLESS MOTOR OR GENERATOR |
| EP4027488A4 (en) * | 2019-09-04 | 2023-08-30 | LG Electronics Inc. | Stator |
| EP4521603A1 (en) * | 2023-09-08 | 2025-03-12 | GKN Aerospace Services Limited | Segmented stator arrangement |
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| DE19652795A1 (en) * | 1996-12-18 | 1998-06-25 | Siemens Ag | Stator for electrodynamic machines and process for their manufacture |
| DE29916605U1 (en) * | 1999-09-21 | 1999-12-09 | ebm Werke GmbH & Co., 74673 Mulfingen | Stator for an electric motor designed as an internal rotor motor |
| JP3621894B2 (en) * | 2001-04-13 | 2005-02-16 | 松下エコシステムズ株式会社 | Stabilizer for internal motor |
| DE10119642A1 (en) * | 2001-04-20 | 2002-11-14 | Lenze Gmbh & Co Kg Aerzen | Stator for an electrical induction machine, in particular synchronous machine |
| US20030094876A1 (en) * | 2001-11-20 | 2003-05-22 | Chun-Pu Hsu | Stator structure with composite windings |
| JP4002451B2 (en) * | 2002-02-27 | 2007-10-31 | ミネベア株式会社 | Rotating electric machine |
| JP3733120B2 (en) * | 2002-12-27 | 2006-01-11 | 穩正企業股▲ふん▼有限公司 | Motor combined stator structure |
| GB2430085B (en) * | 2003-09-05 | 2008-02-06 | Black & Decker Inc | Field assemblies and methods of making same |
| JP2005269831A (en) * | 2004-03-19 | 2005-09-29 | Nidec Shibaura Corp | Brushless dc motor |
| US7122933B2 (en) * | 2004-05-19 | 2006-10-17 | Emerson Electric Co. | Reduced coil segmented stator |
| JP4021433B2 (en) * | 2004-08-30 | 2007-12-12 | 松下エコシステムズ株式会社 | Stator of adder motor |
| EP2568573A3 (en) | 2005-03-07 | 2014-06-04 | Black & Decker Inc. | Power Tools with Motor Having a Multi-Piece Stator |
| GB0613941D0 (en) | 2006-07-13 | 2006-08-23 | Pml Flightlink Ltd | Electronically controlled motors |
| DE102008036025A1 (en) * | 2008-08-01 | 2010-02-18 | Num Industry Alliance Ag | Stator arrangement for synchronous machine, has poles and intermediate poles, which are held at yoke, where parts of poles and intermediate poles have cross-sections congruently transverse to longitudinal axis of yoke |
| DE102011080959B4 (en) * | 2011-08-15 | 2020-12-17 | Valeo Siemens Eautomotive Germany Gmbh | External rotor machine with stator segments |
| CN104467244A (en) * | 2013-09-12 | 2015-03-25 | 台达电子工业股份有限公司 | Waterproof and dustproof motor |
| DE102016224071A1 (en) * | 2016-12-02 | 2018-06-07 | Efficient Energy Gmbh | MULTIPLE STATOR FOR AN ELECTRIC MOTOR, METHOD FOR MANUFACTURING A MULTIPLE STATUS, ELECTRIC MOTOR AND HEAT PUMP |
| RU2682895C1 (en) * | 2018-02-06 | 2019-03-22 | Общество с ограниченной ответственностью "Полимагнит Санкт-Петербург" | Electric machine stator and method for assembly thereof |
| GB2590384B (en) * | 2019-12-13 | 2022-12-07 | Dyson Technology Ltd | An electric motor |
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- 1988-10-26 GB GB888825071A patent/GB8825071D0/en active Pending
-
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- 1989-10-17 JP JP1511006A patent/JPH03501919A/en active Pending
- 1989-10-17 EP EP19890911832 patent/EP0394414A1/en not_active Withdrawn
- 1989-10-17 GB GB8923359A patent/GB2224399A/en not_active Withdrawn
- 1989-10-17 WO PCT/GB1989/001226 patent/WO1990004874A1/en not_active Ceased
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| DE3208155A1 (en) * | 1982-03-06 | 1983-09-08 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Small asynchronous motor |
| GB2123318A (en) * | 1982-07-08 | 1984-02-01 | Distillers Company The | Stators for electric motors |
| WO1989002670A1 (en) * | 1987-09-10 | 1989-03-23 | Digital Equipment Corporation | Armature for dc motor |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995012912A1 (en) * | 1993-11-01 | 1995-05-11 | Stridsberg Innovation Ab | An electric motor and its fabrication |
| DE19629383A1 (en) * | 1996-07-20 | 1998-01-22 | Aweco Kunststofftech Geraete | Stator lamination for fixed part of electric machine esp synchronous or asynchronous machine |
| WO1998029938A3 (en) * | 1996-12-30 | 1998-10-15 | Arcelik As | A high performance electric motor |
| US7233091B2 (en) | 2003-09-05 | 2007-06-19 | Black & Decker Inc. | Electric motor with field assemblies having core pieces with mating features |
| US7528520B2 (en) | 2003-09-05 | 2009-05-05 | Black & Decker Inc. | Electric motor having a field assembly with slot insulation |
| US7146706B2 (en) | 2003-09-05 | 2006-12-12 | Black & Decker Inc. | Method of making an electric motor |
| US7205696B2 (en) | 2003-09-05 | 2007-04-17 | Black & Decker Inc. | Field assemblies having pole pieces with ends that decrease in width, and methods of making same |
| US7211920B2 (en) | 2003-09-05 | 2007-05-01 | Black & Decker Inc. | Field assemblies having pole pieces with axial lengths less than an axial length of a back iron portion and methods of making same |
| US7078843B2 (en) | 2003-09-05 | 2006-07-18 | Black & Decker Inc. | Field assemblies and methods of making same |
| DE102004029442A1 (en) * | 2004-06-18 | 2006-01-26 | Minebea Co., Ltd. | Stator system for an electric motor has a stator ring with radially and tangentially orientated ring segments arranged alternately |
| WO2008128659A3 (en) * | 2007-04-21 | 2008-12-11 | Bosch Gmbh Robert | Electric machine with teeth made of metal sheets |
| DE102009001588A1 (en) * | 2009-03-17 | 2010-09-23 | Hilti Aktiengesellschaft | Stator for an electrodynamic machine |
| WO2014074423A2 (en) | 2012-11-06 | 2014-05-15 | Russel Marvin | Compact permanent magnet machine construction |
| EP2918001A4 (en) * | 2012-11-06 | 2016-07-27 | Russel Marvin | COMPACT PERMANENT MAGNET MACHINE STRUCTURE |
| EP4027488A4 (en) * | 2019-09-04 | 2023-08-30 | LG Electronics Inc. | Stator |
| US12149120B2 (en) | 2019-09-04 | 2024-11-19 | Lg Electronics Inc. | Stator with split teeth with coupling portion to back yoke |
| FR3121555A1 (en) * | 2021-04-06 | 2022-10-07 | Inteva Products, Llc. | STATOR FOR BRUSHLESS MOTOR OR GENERATOR |
| EP4521603A1 (en) * | 2023-09-08 | 2025-03-12 | GKN Aerospace Services Limited | Segmented stator arrangement |
| WO2025051887A1 (en) * | 2023-09-08 | 2025-03-13 | Gkn Aerospace Services Limited | Segmented stator arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2224399A (en) | 1990-05-02 |
| GB8923359D0 (en) | 1989-12-06 |
| JPH03501919A (en) | 1991-04-25 |
| EP0394414A1 (en) | 1990-10-31 |
| GB8825071D0 (en) | 1988-11-30 |
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