DE19617134A1 - Brushless electric motor control magnet - Google Patents

Brushless electric motor control magnet

Info

Publication number
DE19617134A1
DE19617134A1 DE1996117134 DE19617134A DE19617134A1 DE 19617134 A1 DE19617134 A1 DE 19617134A1 DE 1996117134 DE1996117134 DE 1996117134 DE 19617134 A DE19617134 A DE 19617134A DE 19617134 A1 DE19617134 A1 DE 19617134A1
Authority
DE
Germany
Prior art keywords
permanent magnet
ring part
shaft
ring
rotor shaft
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.)
Withdrawn
Application number
DE1996117134
Other languages
German (de)
Inventor
Michael Dipl Ing Zisler
Michael Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE1996117134 priority Critical patent/DE19617134A1/en
Publication of DE19617134A1 publication Critical patent/DE19617134A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
    • F16D1/068—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving gluing, welding or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
    • F16D1/0858—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to the elasticity of the hub (including shrink fits)
    • 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
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

The control magnet is provided by an annular permanent magnet (3) fitted to the rotor shaft (1) of the motor via an magnetic ring (2). The permanent magnet is secured to its inside surface of the ring via its outer surface, with an integral fixing element (4) securing the ring to the outside of the rotor shaft. Pref. the ring has a U-shaped cross-section, with the permanent magnet attached to the radially outer arm and the inner arm acting as the fixing element secured to the rotor shaft, with limited play between the inside of the permanent magnet and the rotor shaft.

Description

Die Erfindung betrifft eine Anordnung eines ringförmigen Dauermagneten auf einer Welle.The invention relates to an arrangement of an annular Permanent magnets on a shaft.

Durch die DE-C-39 31 257 ist ein bürstenloser Motor bekannt, bei dem ein Steuermagnet auf der Läuferwelle des Motors angeordnet ist.A brushless motor is known from DE-C-39 31 257, with a control magnet on the rotor shaft of the motor is arranged.

Es hat sich gezeigt, daß bei einer solchen Anordnung eines Magneten auf einer Welle der Magnet beispielsweise infolge von während des Betriebes durch Erwärmung hervorgerufene mechanische Spannungen reißen und somit seine Funktion nicht mehr einwandfrei erfüllen kann.It has been shown that with such an arrangement Magnets on a shaft caused by the magnet, for example caused by heating during operation mechanical tensions break and therefore its function does not can do more perfectly.

Der Erfindung liegt die Aufgabe zugrunde eine Anordnung eines ringförmigen Dauermagneten auf einer Welle so zu gestalten, daß ein Reißen des Magneten auf möglichst einfache Weise verhindert wird.The invention has for its object an arrangement of a to design ring-shaped permanent magnets on a shaft so that tearing the magnet in the simplest possible way is prevented.

Die Lösung der gestellten Aufgabe gelingt nach der Erfindung dadurch, daß der Dauermagnet in ein aus amagnetischem Material bestehendes, mit der Welle verbundenes Ringteil eingesetzt ist, wobei der Dauermagnet an seinem Außenumfang fest an dem Ringteil anliegt und an seinem Innenumfang die Welle mit Spiel umschließt. Der Dauermagnet wird somit von dem Ringteil getragen und ist infolge des an seinem Innenumfang gegenüber der Welle bestehenden Spieles von der Welle entkoppelt, so daß sich Wärmedehnungen der Welle nicht mehr auf den Dauermagneten auswirken können. Durch das Ringteil wird aber auch ein auf anderen als Wärmedehnungen der Welle beruhendes Reißen des Dauermagneten verhindert. The problem is solved according to the invention in that the permanent magnet in a non-magnetic Material existing ring part connected to the shaft is used, the permanent magnet on its outer circumference fits tightly on the ring part and on its inner circumference Encloses the shaft with play. The permanent magnet is thus from the ring part and is due to the on his Inner circumference compared to the existing game of the shaft Shaft decouples so that thermal expansion of the shaft does not occur can affect the permanent magnet more. By the However, the ring part also becomes a non-thermal expansion prevents permanent magnet from tearing due to the shaft.  

Zweckmäßigerweise wird das Ringteil über ein einstückig an ihm angeformtes Halteteil sowohl in axialer als auch in Umfangsrichtung fest mit der Welle verbunden.The ring part is expediently attached in one piece molded on him in both axial and in Circumferential direction firmly connected to the shaft.

Besonders vorteilhaft ist es, daß das Ringteil im Querschnitt die Form eines liegenden U aufweist und der Dauermagnet in den Innenraum des U-förmigen Ringteiles eingesetzt ist, wobei der Dauermagnet mit seinem Außenumfang an dem radial äußeren Schenkel des Ringteiles fest anliegt und den radial inneren Schenkel mit Spiel umschließt. Bei einer solchen Form des Ringteiles kann der Dauermagnet in das Ringteil eingesetzt werden bevor dieses auf der Welle montiert wird.It is particularly advantageous that the ring part in cross section has the shape of a lying U and the permanent magnet in the interior of the U-shaped ring part is inserted, wherein the permanent magnet with its outer circumference on the radially outer Leg of the ring part is tight and the radially inner Encloses thighs with play. With such a form of Ring part, the permanent magnet can be inserted into the ring part before it is mounted on the shaft.

Anhand eines in der Zeichnung dargestellten Ausführungs­ beispieles wird die Erfindung nachfolgend noch näher erläutert.Based on an execution shown in the drawing for example, the invention will be described in more detail below explained.

Es zeigt:It shows:

Fig. 1 eine Befestigungsmöglichkeit eines Dauermagneten mittels eines im Querschnitt U-förmigen Ringteiles, Fig. 1 shows a fastening possibility of a permanent magnet by means of a cross-sectionally U-shaped ring part,

Fig. 2 eine Befestigungsmöglichkeit eines Dauermagneten mittels eines im Querschnitt Z-förmigen Ringteiles. Fig. 2 shows a fastening option of a permanent magnet by means of a ring part with a Z-shaped cross section.

Mit 1 ist eine Welle, z. B. die Läuferwelle einer elektrischen Maschine bezeichnet. Auf diese Welle 1 ist ein im Querschnitt U-förmiges Ringteil 2 (Fig. 1) so aufgebracht, daß dessen innerer und äußerer Schenkel 4 und 5 parallel zur Wellenachse verlaufen. In den Innenraum des Ringteiles 2 ist ein ringförmiger Dauermagnet 3 derart eingesetzt, daß dieser mit seinem Außenumfang fest an der Innenseite des radial äußeren Schenkels 5 des U-förmigen Ringteiles 2 anliegt. Der Innendurchmesser des Dauermagneten 3 ist so bemessen, daß zwischen dem Innenumfang des Dauermagneten 3 und der Welle 1 zumindest ein geringes Spiel besteht. Damit werden Wärmedehnungen der Welle 1 von dem Dauermagneten 3 ferngehalten. Durch das feste Anliegen des Dauermagneten 3 an dem äußeren Schenkel 5 des Ringteiles 2 wird der Dauermagnet 3 auch gegen ein auf Lunkerbildung oder Versprödung beruhendes Reißen geschützt.With 1 is a wave, e.g. B. denotes the rotor shaft of an electrical machine. On this shaft 1 a cross-sectionally U-shaped ring part 2 ( Fig. 1) is applied so that its inner and outer legs 4 and 5 run parallel to the shaft axis. In the interior of the ring part 2 , an annular permanent magnet 3 is inserted in such a way that its outer circumference lies firmly against the inside of the radially outer leg 5 of the U-shaped ring part 2 . The inner diameter of the permanent magnet 3 is dimensioned such that there is at least a slight play between the inner circumference of the permanent magnet 3 and the shaft 1 . Thermal expansions of the shaft 1 are thus kept away from the permanent magnet 3 . Due to the permanent contact of the permanent magnet 3 on the outer leg 5 of the ring part 2 , the permanent magnet 3 is also protected against tearing due to the formation of voids or embrittlement.

Die Befestigung des Ringteiles 2 auf der Welle 1 erfolgt über seinen inneren U-Schenkel 4. Mit diesem Schenkel 4 kann das Ringteil 2 auf die Welle 1 aufgeschrumpft oder auch durch Kleben mit dieser verbunden werden.The ring part 2 is fastened on the shaft 1 via its inner U-leg 4 . With this leg 4 , the ring part 2 can be shrunk onto the shaft 1 or connected to it by gluing.

In Fig. 2 ist eine weitere Ausführungsform des Ringteiles 2 gezeigt. Hier ist das Ringteil 2 im Querschnitt Z-förmig ausgebildet. Mit seinem inneren Z-Arm 6 liegt das Ringteil 2 an der Welle 1 an und ist mit dieser verbunden. Der Dauermagnet 3 liegt an der Innenseite des äußeren Z-Armes 7 an und wird durch diesen getragen. Zwischen dem Dauermagneten 3 und der Welle 1 besteht ein Spalt 8. Damit ist der Dauermagnet 3 mechanisch vollständig von der Welle 1 abgekoppelt und kann somit auch nicht durch Wärmedehnungen der Welle 1 beansprucht werden.A further embodiment of the ring part 2 is shown in FIG. 2. Here, the ring part 2 is Z-shaped in cross section. With its inner Z-arm 6 , the ring part 2 bears against the shaft 1 and is connected to it. The permanent magnet 3 bears against the inside of the outer Z-arm 7 and is supported by it. There is a gap 8 between the permanent magnet 3 and the shaft 1 . The permanent magnet 3 is thus completely mechanically decoupled from the shaft 1 and therefore cannot be stressed by thermal expansions of the shaft 1 .

Claims (3)

1. Anordnung eines ringförmigen Dauermagneten auf einer Welle, dadurch gekennzeichnet, daß der Dauermagnet (3) in ein aus amagnetischem Material beste­ hendes, mit der Welle (1) verbundenes Ringteil (2) eingesetzt ist, wobei der Dauermagnet (3) an seinem Außenumfang fest an dem Ringteil (2) anliegt und an seinem Innenumfang die Welle (1) mit Spiel umschließt.1. Arrangement of an annular permanent magnet on a shaft, characterized in that the permanent magnet ( 3 ) in an existing of amagnetic material existing with the shaft ( 1 ) connected ring part ( 2 ) is used, the permanent magnet ( 3 ) on its outer circumference fits tightly against the ring part ( 2 ) and surrounds the shaft ( 1 ) with play on its inner circumference. 2. Anordnung nach Anspruch 1, dadurch gekenn­ zeichnet, daß das Ringteil (2) über ein einstückig an­ geformtes Halteteil (4 bzw. 6) mit der Welle (1) sowohl in axialer als auch in Umfangsrichtung fest verbunden ist.2. Arrangement according to claim 1, characterized in that the ring part ( 2 ) via a piece of molded holding part ( 4 or 6 ) with the shaft ( 1 ) is firmly connected both in the axial and in the circumferential direction. 3. Anordnung nach Anspruch 2, dadurch gekenn­ zeichnet, daß das Ringteil (2) im Querschnitt die Form eines liegenden U aufweist und der Dauermagnet (3) in den In­ nenraum des U-förmigen Ringteiles (2) eingesetzt ist, wobei der Dauermagnet (3) mit seinem Außenumfang an dem radial äu­ ßeren Schenkel (5) des Ringteiles fest anliegt und den radial inneren Schenkel (4) mit Spiel umschließt.3. Arrangement according to claim 2, characterized in that the ring part ( 2 ) has the shape of a lying U in cross section and the permanent magnet ( 3 ) in the inner space of the U-shaped ring part ( 2 ) is inserted, the permanent magnet ( 3 ) with its outer circumference against the radially outer leg ( 5 ) of the ring part and tightly surrounds the radially inner leg ( 4 ) with play.
DE1996117134 1996-04-29 1996-04-29 Brushless electric motor control magnet Withdrawn DE19617134A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996117134 DE19617134A1 (en) 1996-04-29 1996-04-29 Brushless electric motor control magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996117134 DE19617134A1 (en) 1996-04-29 1996-04-29 Brushless electric motor control magnet

Publications (1)

Publication Number Publication Date
DE19617134A1 true DE19617134A1 (en) 1997-10-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996117134 Withdrawn DE19617134A1 (en) 1996-04-29 1996-04-29 Brushless electric motor control magnet

Country Status (1)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999030404A1 (en) * 1997-12-11 1999-06-17 Empresa Brasileira De Compressores S.A. - Embraco Bushing for a rotor of an electric motor for a compressor
WO1999061921A1 (en) * 1998-05-27 1999-12-02 Robert Bosch Gmbh Hollow magnetic body for detecting the rotation of a shaft
DE19838659A1 (en) * 1998-07-10 2000-01-13 Mannesmann Vdo Ag Electric motor for driving a motor vehicle's steering aid, esp. of a motor car, has magnetic shells held partic. reliably on rotor
FR2870055A1 (en) * 2004-04-30 2005-11-11 Valeo Equip Electr Moteur POLYPHASE ELECTRIC ROTATING ELECTRIC MACHINE FOR A MOTOR VEHICLE EQUIPPED WITH MAGNETIC MEANS FOR MONITORING THE ROTATION OF THE ROTOR OF IMPROVED MECHANICAL RESISTANCE
DE10314394B4 (en) * 2003-03-28 2007-02-01 Siemens Ag Rotor for a brushless DC motor and method for mounting such a rotor
US7893579B2 (en) 2005-07-26 2011-02-22 Ebm-Papst St. Georgen Gmbh & Co. Kg Brushless electric motor
US8324892B2 (en) 2005-07-26 2012-12-04 Ebm-Papst St. Georgen Gmbh & Co. Kg Absolute encoder and method for generating an absolute value for a angle of rotation
CN104405762A (en) * 2014-11-20 2015-03-11 吴中区光福金怡五金配件厂 Cross shaft structure
DE19923315B4 (en) * 1999-05-21 2015-06-18 Zf Friedrichshafen Ag Drive system for a motor vehicle
DE202016105237U1 (en) 2016-09-20 2016-10-07 MS-Schramberg Holding GmbH Electromechanical composite component

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235760A (en) * 1961-12-28 1966-02-15 Garrett Corp Dynamo field structure
DE1538802A1 (en) * 1966-06-08 1970-01-29 Garrett Corp Fastening arrangement for an annular permanent magnet placed concentrically on the shaft of an axial air gap machine
CH604415A (en) * 1975-05-30 1978-09-15 Ebauches Sa ELECTROMAGNETIC MOTOR FOR WATCHMAKING.
GB1563002A (en) * 1975-09-22 1980-03-19 Citizen Watch Co Ltd Rotar assembly for a stepping motor
GB1600767A (en) * 1977-06-07 1981-10-21 Citizen Watch Co Ltd Rotor assembly for stepping motor
US4385276A (en) * 1980-01-28 1983-05-24 Black & Decker Inc. Mounting of semiconductor sensing means for an electromagnetic tachometer in a portable electric tool
DE2900756C2 (en) * 1978-01-14 1983-08-04 Citizen Watch Co., Ltd., Tokyo Rotor arrangement for a stepping motor of an electronic watch
EP0243187A2 (en) * 1986-04-25 1987-10-28 Isuzu Motors Limited Electric generator for use in a turbocharger and turbocharger including said generator

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235760A (en) * 1961-12-28 1966-02-15 Garrett Corp Dynamo field structure
DE1538802A1 (en) * 1966-06-08 1970-01-29 Garrett Corp Fastening arrangement for an annular permanent magnet placed concentrically on the shaft of an axial air gap machine
CH604415A (en) * 1975-05-30 1978-09-15 Ebauches Sa ELECTROMAGNETIC MOTOR FOR WATCHMAKING.
GB1563002A (en) * 1975-09-22 1980-03-19 Citizen Watch Co Ltd Rotar assembly for a stepping motor
GB1600767A (en) * 1977-06-07 1981-10-21 Citizen Watch Co Ltd Rotor assembly for stepping motor
DE2900756C2 (en) * 1978-01-14 1983-08-04 Citizen Watch Co., Ltd., Tokyo Rotor arrangement for a stepping motor of an electronic watch
US4385276A (en) * 1980-01-28 1983-05-24 Black & Decker Inc. Mounting of semiconductor sensing means for an electromagnetic tachometer in a portable electric tool
EP0243187A2 (en) * 1986-04-25 1987-10-28 Isuzu Motors Limited Electric generator for use in a turbocharger and turbocharger including said generator

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999030404A1 (en) * 1997-12-11 1999-06-17 Empresa Brasileira De Compressores S.A. - Embraco Bushing for a rotor of an electric motor for a compressor
US6376954B1 (en) 1997-12-11 2002-04-23 Empresa Brasileira De Compressores S./A -Sembraco Hermetic compressor for a refrigeration system
WO1999061921A1 (en) * 1998-05-27 1999-12-02 Robert Bosch Gmbh Hollow magnetic body for detecting the rotation of a shaft
DE19838659A1 (en) * 1998-07-10 2000-01-13 Mannesmann Vdo Ag Electric motor for driving a motor vehicle's steering aid, esp. of a motor car, has magnetic shells held partic. reliably on rotor
DE19923315B4 (en) * 1999-05-21 2015-06-18 Zf Friedrichshafen Ag Drive system for a motor vehicle
DE10314394B4 (en) * 2003-03-28 2007-02-01 Siemens Ag Rotor for a brushless DC motor and method for mounting such a rotor
WO2005117244A1 (en) * 2004-04-30 2005-12-08 Valeo Equipements Electriques Moteur Polyphase rotating electrical machine for a motor vehicle
FR2870055A1 (en) * 2004-04-30 2005-11-11 Valeo Equip Electr Moteur POLYPHASE ELECTRIC ROTATING ELECTRIC MACHINE FOR A MOTOR VEHICLE EQUIPPED WITH MAGNETIC MEANS FOR MONITORING THE ROTATION OF THE ROTOR OF IMPROVED MECHANICAL RESISTANCE
DE112005000419B4 (en) * 2004-04-30 2017-10-05 Valeo Equipements Electriques Moteur Multi-phase rotary electric machine for motor vehicles
US7893579B2 (en) 2005-07-26 2011-02-22 Ebm-Papst St. Georgen Gmbh & Co. Kg Brushless electric motor
US8324892B2 (en) 2005-07-26 2012-12-04 Ebm-Papst St. Georgen Gmbh & Co. Kg Absolute encoder and method for generating an absolute value for a angle of rotation
CN104405762A (en) * 2014-11-20 2015-03-11 吴中区光福金怡五金配件厂 Cross shaft structure
DE202016105237U1 (en) 2016-09-20 2016-10-07 MS-Schramberg Holding GmbH Electromechanical composite component
WO2018054679A1 (en) 2016-09-20 2018-03-29 Ms-Schramberg Holding Gmbh & Co. Kg Electromechanical composite component and method for producing same

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