Source: http://www.google.com/patents/US7417342?dq=2040248
Timestamp: 2015-01-29 05:07:23
Document Index: 732795791

Matched Legal Cases: ['art.\n5', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art\n4']

Patent US7417342 - Holder for winding wires for stators of electric motors - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe invention relates to a holder for the winding wires for stators of electric motors consisting of a component to be disposed on the stator having means for holding and guiding the winding wires that run between the individual stator windings. According to the invention, the holder is designed as a...http://www.google.com/patents/US7417342?utm_source=gb-gplus-sharePatent US7417342 - Holder for winding wires for stators of electric motorsAdvanced Patent SearchPublication numberUS7417342 B2Publication typeGrantApplication numberUS 11/520,468Publication dateAug 26, 2008Filing dateSep 12, 2006Priority dateSep 16, 2005Fee statusPaidAlso published asDE102005044309A1, DE102005044309B4, US20070063598Publication number11520468, 520468, US 7417342 B2, US 7417342B2, US-B2-7417342, US7417342 B2, US7417342B2InventorsMartin Engesser, Stefan SchwambergerOriginal AssigneeMinebea Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (16), Referenced by (1), Classifications (9), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetHolder for winding wires for stators of electric motorsUS 7417342 B2Abstract The invention relates to a holder for the winding wires for stators of electric motors consisting of a component to be disposed on the stator having means for holding and guiding the winding wires that run between the individual stator windings. According to the invention, the holder is designed as a part of a circuit board for connecting the phase windings.
1. A holder for wires connecting a plurality of stator coils on the stator of an electric motor, the holder comprising:
a wire routing element mounted coaxially on the stator;
a plurality of wire guide members extending axially from said wire routing element, each of said wire guide members having a channel to hold and position at least one wire connecting one stator coil to another stator coil of the same phase; and
a printed circuit board integral with said wire routing element, said printed circuit board having at least one solder pad to which wires extending from stator coils having a common phase are affixed.
2. The holder according to claim 1, characterized in that the holder is made up of several layers of material (2 a-2 d).
3. The holder according to claim 2, characterized in that the holder consists of several lamination layers (2 a-2 d).
4. The holder according to claim 1, characterized in that the holder comprises an annular part (3) on which said plurality of wire guide members (4) are arranged and distributed, said printed circuit board extending radially away from said annular part.
5. The holder according to claim 4, characterized in that the wire guide members (4) are formed from at least one layer of material (2 c, 2 d).
6. The holder according to claim 1, characterized in that the holder comprises a plurality of winding members (14) for the stator windings (11).
7. The holder of claim 1 in which the number of wire guide members corresponds to the number of stator coils.
8. The holder of claim 1 in which the number of solder pads corresponds to the number of stator coil phases.
9. The holder of claim 1 in which said wire routing element is coextensive with the stator. Description
BACKGROUND OF THE INVENTION The invention relates to a holder for winding wires for stators of electric motors according to the characteristics of the preamble of claim 1, in particular to such a holder for small-scale electric motors, such as spindle motors used for driving hard disk drives.
DESCRIPTION OF THE PRIOR ART Spindle motors are generally multi-phase motors having several poles per phase. In the case of a 3-phase motor having 9 poles, for example, every third pole is wound with the same phase winding. Here, it is necessary to lead the connecting wires between the individual windings of one phase along the stator and to attach them, or to lead the wire ends to the terminal points. Particularly in the case of miniature motors, manual attachment of the winding wires is made very difficult due to the small dimensions. It is known to lead the connecting wires of the stator windings of one phase around plastic inserts, called bobbins, or over a tongue bent from a stator lamination. The use of plastic inserts has the disadvantage that they are relatively expensive to manufacture and have to be fixed to the stator in an additional assembly procedure. Using lamination tongues, on the other hand, reduces the available space left over for the windings or for the winding device.
SUMMARY OF THE INVENTION It is thus the object of the invention to improve a holder for winding wires for stators of electric motors with respect to their manufacturing costs and assembly-friendliness.
Preferred embodiments and advantageous developments of the invention are cited in the subordinate claims.
According to the invention, the holder for the winding wires is designed as a part of a circuit board, such as a printed circuit board (PCB), for the purpose of connecting the phase windings.
The phase windings of an electric motor have to be connected. To this effect, it is known to connect the wire ends of the stator windings by means of a separate PCB or a flexible circuit board (FCB) or suchlike, and to lead them to the connector plug. These kinds of PCBs for connecting the winding wires are described in U.S. Pat. No. 6,204,996 B1 and U.S. Pat. No. 6,057,616 A.
Proposed is an integration of the functions of both a holder for the winding wires and a printed circuit to connect these winding wires. Compared to a conventional bobbin, the solution according to the invention involves only low additional costs for the manufacture of the printed circuit. There is no longer need for a separate part as a holder for the winding wires.
According to a preferred embodiment of the invention, the holder is built up of several layers of material. The holder is preferably manufactured in a lamination process and comprises several lamination layers.
Apart from the circuit board, the holder comprises an annular part on which a plurality of wire guiding elements are arranged and distributed, the wire guiding elements being constructed from at least one layer of material.
In another embodiment of the invention, it is not only possible for the annular part to have a plurality of wire guiding elements but also an appropriate number of (molded) winding members for the stator windings.
A preferred embodiment of the invention is described below on the basis of the drawings. Further characteristics, advantages and possible applications of the invention can be derived from this.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the holder according to the invention;
FIG. 2 is an enlarged view of a part of the holder of FIG. 1;
FIG. 3 is a perspective view of a holder according to the invention that is disposed on the stator of an electric motor;
FIG. 4 is an enlarged view of the arrangement according to FIG. 3.
DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION A holder 1 according to the invention for the winding wires of stator windings of a spindle motor is shown in FIG. 1. The holder 1 consists substantially of an annular part 3, whose dimensions are adjusted to fit the likewise annular stator of an inner rotor spindle motor, and a circuit board 5, preferably a flexible circuit board, designed to be integrated with the annular part 3. The annular part 3 of the holder 1 is provided with a plurality of hook-like, outwards-directed wire guiding elements 4, the number of wire guiding elements 4 preferably corresponding to the number of stator poles, there being nine stator poles in the illustrated embodiment. In the case of outer rotor motors, the wire guiding elements 4 are directed inwards accordingly.
As can be particularly seen in FIG. 2, the holder 1 consists of several lamination layers 2 a, 2 b, 2 cand 2 dmade of plastics or any other suitable materials, the wire guiding elements 4 in the illustrated embodiment being formed from the two top lamination layers 2 c and 2 d. Here, the upper lamination layers 2 c and 2 d are thicker than the lower layers 2 a and 2 b, the desired form of the wire guiding elements 4 being punched out before lamination or routed out after lamination respectively. It is particularly useful to punch out forms that form the wire guiding elements 4 connected at their outside circumference, to then connect (laminate) these forms, which can consist of several different lamination layers, to the annular part 3 and then punch them out. Winding members 14 cover the top of the stator poles 9, as shown in FIGS. 1 and 2.
The circuit board 5 has substantially the same layered construction as the annular part 3, appropriate metallic strip conductors 7 and solder pads 6 for connecting the wire ends of the stator windings, however, being provided in this case in the lamination construction. A contact field 8 is located at the free end of the circuit board 5 to which the connector for the motor electronics is connected.
FIG. 3 shows the holder 1 mounted on a stator arrangement. In the conventional way, the stator arrangement comprises a stator lamination ring 10 on which a plurality of stator poles 9 are formed. The motor in the illustrated embodiment is an inner rotor motor so that the stator poles 9 are disposed at the inside circumference of the lamination ring 10 and directed towards the center of the ring. Each stator pole 9 carries a stator winding 11. In the case of a 3-phase stator arrangement, as shown in FIG. 3, there are nine stator poles 9, for example, every third pole being wound with the same phase winding. An option here is to use a delta connection for the phase windings, each connecting point of two phase windings being connected to one of the solder pads 6 and led via the strip conductors 7 to the contact fields 8.
FIG. 4 shows an enlarged view of the arrangement in FIG. 3, where it can be seen that the winding wire 12 is led from a stator winding 11 along the annular part 3 and through the wire guiding elements 4 to the next stator winding of the same phase. The ends of the winding wires 12 as well are then led via these guiding elements 4 to the solder pads 6.
The holder 1 is preferably bonded to one side of the stator arrangement and, according to the invention, fulfils not only the object of acting as a holder for the winding wires 12 but also the object of connecting the winding wires via the integrated flexible circuit board 5.
IDENTIFICATION REFERENCE LIST 1 Holder
2 a, 2 b, Lamination layers
2 c, 2 d 3 Annular part
4 Wire guiding element
6 Solder pad
7 Strip conductor
8 Contact field
9 Stator pole
10 Stator lamination ring
11 Stator winding
12 Winding wire
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4039875 *Nov 7, 1975Aug 2, 1977Computer Devices CorporationMethod and apparatus for interconnecting stator coilsUS4096625 *Mar 10, 1977Jun 27, 1978Rapidsyn Co.Method for interconnecting stator coilsUS4182026 *Aug 17, 1977Jan 8, 1980Vibrac CorporationElectric motor manufactureUS4224543 *Aug 1, 1978Sep 23, 1980Rapidsyn Co.Printed circuit terminal for interconnecting stator coilsUS5436517 *Aug 24, 1993Jul 25, 1995Nagano Nidec CorporationRecording disk driving apparatusUS5717273 *Feb 28, 1996Feb 10, 1998Onan CorporationInsulating armature end turn capUS5990589 *Dec 15, 1997Nov 23, 1999Kabushiki Kaisha Sankyo Seiki SeisakushoBrushless motor having core holder mounting to base board forming gap for wire insertionUS6566779 *May 24, 2001May 20, 2003Kabushiki Kaisha MoricCoil winding for DC machineUS6628023 *Jul 2, 1999Sep 30, 2003Valeo Equipment Electriques MoteurMotor vehicle alternator with winding insulated from the housingUS6856055 *Jul 11, 2002Feb 15, 2005Emerson Electric Co.Interconnecting ring and wire guideUS6922002 *Dec 24, 2003Jul 26, 2005Shinano Kenshi Kabushiki KaishaMotorUS6961989 *Oct 20, 2004Nov 8, 2005Minebea Co., Ltd.Stator deviceUS7247962 *Dec 6, 2002Jul 24, 2007Emb-Papst St. Georgen Gmbh & Co. KgStator assemblyUS20050189139 *Feb 26, 2004Sep 1, 2005Hei, Inc.Flexible circuit having an integrally formed batteryUS20070040467 *Aug 16, 2006Feb 22, 2007Minebea Co., Ltd.Stator arrangement for an electric machine and a method for manufacturing the stator arrangementUS20070063598 *Sep 12, 2006Mar 22, 2007Martin EngesserHolder for winding wires for stators of electric motors* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7868495 *Mar 31, 2009Jan 11, 2011Remy Technologies, L.L.C.Electric motor core member* Cited by examinerClassifications U.S. Classification310/71, 310/260International ClassificationH02K11/00Cooperative ClassificationH02K3/522, H02K2203/06, H02K2203/03, H02K5/225, H02K2211/03European ClassificationH02K3/52A1Legal EventsDateCodeEventDescriptionJan 25, 2012FPAYFee paymentYear of fee payment: 4Oct 12, 2006ASAssignmentOwner name: MINEBEA CO., LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ENGESSER, MARTIN;SCHWAMBERGER, STEFAN;REEL/FRAME:018405/0994Effective date: 20060915RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services