WO2014016100A2 - Dispositif de rotor pour une machine électrique et palier du dispositif de rotor - Google Patents

Dispositif de rotor pour une machine électrique et palier du dispositif de rotor Download PDF

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Publication number
WO2014016100A2
WO2014016100A2 PCT/EP2013/064166 EP2013064166W WO2014016100A2 WO 2014016100 A2 WO2014016100 A2 WO 2014016100A2 EP 2013064166 W EP2013064166 W EP 2013064166W WO 2014016100 A2 WO2014016100 A2 WO 2014016100A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
sensor wheel
sensor
wheel
annular element
Prior art date
Application number
PCT/EP2013/064166
Other languages
German (de)
English (en)
Other versions
WO2014016100A3 (fr
Inventor
Marius-Ovidiu Popescu
Michael Haider
Michael Nigro
Kurt Reutlinger
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2014016100A2 publication Critical patent/WO2014016100A2/fr
Publication of WO2014016100A3 publication Critical patent/WO2014016100A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/20—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar machine

Definitions

  • the present invention relates to electrical machines, in particular hybrid-excited homopolar machines. Furthermore, the present invention relates to a structure of rotor assemblies of hybrid-excited Homopolarmaschinen.
  • an electric motor engages the steering to increase the driver's steering effort.
  • an electric machine is connected via a rigid gear to the handlebar, wherein the electric machine is controlled so that a steering movement of the driver is supported.
  • torque fluctuations occur which can be felt when the steering wheel is actuated.
  • an electric motor for steering power assistance is usually provided as the electric motor for a steering power assistance.
  • Hends hybrid-excited homopolar machines used as an electric motor for use in a steering power assistance are especially provided.
  • rotor position sensors in the form of encoder wheels on the rotor shaft are usually provided in the interior of the electrical machine, which are aligned in a defined manner to the rotor position and have a magnetic, optical or other coding.
  • magnetic encoder wheels are used, which have a specific structure or a specific magnetization pattern.
  • a method for mounting a sensor wheel of a position sensor on a rotor arrangement wherein the rotor arrangement has a rotor body arranged on a rotor shaft, which comprises at least one rotor part for providing a field magnetic field, comprising the following steps:
  • One idea of the above method for mounting a sensor wheel of a position sensor on a rotor assembly is to arrange a sensor rider wheel with respect to a rotor shaft of the rotor assembly so that it has a defined position with respect to the rotor topology.
  • a position sensor constructed using the sensor rider wheel can reliably detect the rotor position and provide an absolute value for the rotor position.
  • An idea is moreover to mount the sensor rider wheel not directly on the rotor shaft but directly on a rotor body mounted on the rotor shaft, so that the relative angular position of the sensor rake wheel with respect to the rotor shaft can be determined in a simpler manner.
  • the encoder wheel can be pushed onto a tapered end portion of the rotor body.
  • the encoder wheel can be applied to a front end of the rotor body for arranging.
  • the sender wheel may be fixed by means of an annular element which is placed on the rotor shaft, so that the sender wheel is arranged between the rotor body and the annular element, wherein the annular element
  • the donor gear may be concentrically attached to an annular member, the annular member being soft magnetic and mounted on the rotor shaft so as to abut directly on the rotor member and by a magnetic field provided by a permanent magnet disposed in the rotor member , is held.
  • the encoder wheel can be fixed by gluing or welding to the rotor body.
  • a rotor assembly for an electric machine comprising:
  • a rotor body which is placed on the rotor shaft; and a sender wheel of a position sensor, which rests directly on the rotor body and is fastened by a fastening device on the rotor body in a position oriented relative to the rotor body.
  • the fastening device may comprise an annular element which is placed on the rotor shaft, so that the encoder wheel between the rotor body and the annular element is arranged, wherein the annular element
  • the donor wheel can be mounted concentrically on an annular element, wherein the annular element is soft magnetic and is placed on the rotor shaft, so that it bears directly against the rotor part and held by a magnetic field provided by the at least one permanent magnet becomes.
  • Figures 1 a-1 c process steps for constructing a rotor for a
  • FIGS. 2a-2c show method steps according to a further embodiment for constructing a rotor for an electric motor; until the step of attaching the sensor wheel;
  • FIGS. 3a-3c show method steps according to a further embodiment for constructing a rotor for an electrical machine until prior to the step of attaching the sensor rim;
  • FIGS. 5a-5d show a method for constructing an electrical machine with the above rotor arrangement.
  • FIGS. 1 a to 1 c show the first method steps for constructing a rotor for a hybrid-excited homopolar machine.
  • the rotor assembly to be constructed has two rotor parts, which are mounted at a distance from each other on a shaft to receive a stator fixedly arranged exciter coil.
  • a rotor core 2 is applied to a rotor shaft 1.
  • the rotor core 2 is formed of a soft magnetic material and has a first portion 21 and a second portion 22 which are formed to receive respective rotor parts.
  • the outer diameter is adapted to an inner diameter of the aufndden rotor part.
  • an enlarged-diameter center portion 23 which is designed to receive an exciting magnetic field impressed by an exciting coil (not shown).
  • the rotor core 2 is pressed onto the shaft 1, so that the rotor core 2 is held with a press fit on the shaft 1.
  • one or more press notches 6 can be provided on the shaft 1.
  • a first rotor part 3 which is formed from a soft magnetic material in which permanent magnets are embedded for forming rotor poles, is pushed onto the first rotor core section 21 of the rotor core 2.
  • the first rotor part 3 has an inner diameter which corresponds to an outer diameter of the first section 21 of the rotor core 2, so that a suitable fit of the first rotor part 3 on the first rotor core section 21 is achieved.
  • the first rotor portion 3 can be reliably held by using unused press notches on the rotor core portion 21 or by a press fit. It is thereby avoided that the first rotor part 3 is held on a portion of the shaft 1, over which the rotor core 2 or the center section 23 of the rotor core 2 has previously been slid, whereby any press notches have been damaged or made unusable.
  • FIGS. 2a to 2c show an alternative method of constructing a rotor assembly up to the step of attaching a sensor rotor.
  • a rotor core 12 is pushed onto a rotor shaft 1 1 from a first side.
  • the rotor core 12 has, unlike the rotor core 2 described above, only one edge portion 123 corresponding to the above-described center portion 23 and a rotor portion 121, while no rotor core portion is provided on a side of the edge portion 123 opposite to the rotor core portion 121.
  • a first rotor part 13 is pushed from a second side of the rotor shaft 1 1, as shown in Figure 2b, which has an inner diameter which corresponds approximately to the outer diameter of the rotor shaft 1 1.
  • the first rotor part 13 is pressed onto the rotor shaft 1 1 so that it is held in a press fit and / or by press notches 6 on the rotor shaft 1 1.
  • a first bearing 14 is pushed from the same side to the rotor shaft 1 1.
  • the application of the rotor core 12 to the rotor shaft 1 1 via a first end of the rotor shaft 1 1, which is different from the second end over which the first rotor part 13 and the first bearing 14 are applied, has the advantage that the rotor part 13 can be pressed onto the rotor shaft 1 1 "unused" press notches or "unused” sections of press notches, so that a more reliable mounting of the first rotor part 13 is achieved.
  • FIGS. 3a to 3c show an alternative method for constructing a rotor arrangement.
  • FIG. 3 a shows that a rotor core 42 is pushed onto a rotor shaft 41 from a first side.
  • the rotor core 42 has, in contrast to the rotor core 2 described above, only one of the above-described center section 23 corresponding section.
  • a first rotor part 43 is pushed from a second side of the rotor shaft 1 1, as shown in Figure 3b, which has an inner diameter which corresponds approximately to the outer diameter of the rotor shaft 1 1.
  • the first rotor part 43 is pressed onto the rotor shaft 41, so that this in an interference fit and / or by
  • Press notches 6 is held on the rotor shaft 41.
  • a first bearing 44 is pushed onto the rotor shaft 41 from the same side.
  • the application of the rotor core 42 to the rotor shaft 41 via a first end of the rotor shaft 41, which is different from the second end, over which the first rotor part 43 and the first bearing 44 is applied, has the advantage that the rotor part 43 on the Rotor shaft 41 can be pressed over "unused" press notches or "unused" sections of press notches, so that a more reliable support of the first rotor part 43 is achieved.
  • a sensor rake wheel 20 is now applied on the side opposite the first rotor part 3, 13 relative to the center section 23.
  • the sensor wheel 20 is usually designed as an annular element which serves for the optical or magnetic detection of a movement of the rotor shaft 1, 1 1.
  • the sensor wheel 20 can be designed as a structured soft-magnetic ring, a ring formed with different-pole magnetic regions, a ring with optically recognizable markings or structuring on one of its surfaces or the like.
  • the sensor rake 20 is applied on a stepped end portion of the rotor core portion 22, 121 or disposed adjacent to an end face of the rotor core portion 22, 121.
  • FIGS. 4a to 4i show different types of mounting of the sensor wheel 20.
  • the sensor wheel 20 is applied to the end portion 24 of the rotor core 2, which has a smaller diameter than the rotor core portion 22, 121 in question, and adheres to it.
  • the sensor wheel 20 can be aligned with respect to the rotor shaft 1 so as to achieve a defined angular position between the rotor parts 3, 13 and the sensor wheel 20.
  • the sensor wheel 20 is mounted on the sensor rim 20 on the end section of the rotor core 2 instead of by gluing using a clip connection with a recess on the end section and a corresponding latching element.
  • the clip connection is not circumferential, so that likewise a predefined angular position of the sensor rim 20 on the end section 24 can be achieved.
  • the sensor wheel 20 can also be clipped onto directly on the rotor shaft 1, 1 1, so as a
  • the sensor rim 20 can be caulked on the end section 24, as shown in FIG that between a caulking point 25 and the step between the end portion 24 and the rotor core portion 22, 121 of the rotor core 2 is clamped and thus reliably held in the intended angular position.
  • FIG. 4 d the attachment of the sensor rim 20 on the end face of the rotor section is shown by means of a screw connection through a hollow screw 26, which surrounds the rotor shaft 1, 1 1 in the mounted state and engages in an internal thread in the rotor body 2. This likewise makes it possible to fix the sensor rim 20 in the same way as it does with regard to angular position.
  • a fixation can be provided with a screw connection even with an attachment of the sensor wheel 20 on a tapered end portion 24 of the rotor core 2.
  • the sensor rim 20 can also be welded to the end section 24 at a weld S, preferably at the front-side interface between the sensor rim 20 and the end section 24.
  • FIG. 4g Another embodiment is shown in FIG. 4g.
  • the sensor wheel 20 using an additional magnetic retaining ring 28 whose poling z. B. is aligned in the axial direction, fixed to the rotor core 2.
  • the rotor core 2 is formed soft magnetic at least in the region of the end face F, so that the sensor rake 20 can be held by clamping by acting between the magnetic retaining ring 28 and the end face of the rotor core portion 22, 121 magnetic force.
  • the sensor wheel 20 may also be held by clamping on the end portion 24 by means of the magnetic retaining ring 28.
  • the holding of the sensor wheel 20 by means of the magnetic retaining ring 28 allows a very simple readjustment of the relative angular position of the sensor cam 20 with respect to the rotor parts of the rotor.
  • FIG. 4i shows a further embodiment in which the sensor rake wheel 20 is mounted on a round metal plate 29 which has a minimum diameter which is twice the distance between one and the other. gate parts provided corresponding permanent magnet.
  • the sensor rim 20 can then be attached after application of the second rotor part to an outer end face of the second rotor part 22 by the metal plate, which carries the sensor cam 20 is magnetically held by the permanent magnets of the second rotor part 22.
  • FIGS. 5a to 5d further describe the method for the further construction of the hybrid-excited homopolar engine with the previously partially manufactured rotor arrangement.
  • the first bearing 4 are inserted into a pot-shaped housing 50 of the electrical machine into a corresponding first bearing holder 51 and then a stator arrangement 52 is inserted into the housing 50.
  • the stator assembly 52 has stator coils 53 and a central excitation coil 54 which is oriented transversely to the axial direction of the electric machine.
  • the exciter coil 54 comes to lie radially over the center section 23 of the rotor core 2, so that an additional excitation magnetic field can be impressed into the rotor arrangement via the excitation coil 54 during operation.
  • step 5b now the second rotor part 5 is pushed onto the rotor core portion 22 of the rotor core 2 and the open end side of the pot-shaped housing 50 is closed with a corresponding housing cover 55.
  • the housing cover 55 has on its outer side a concavity, in which a second bearing 10, as shown in Figure 5d, is used to complete the assembly of the electric machine.
  • the application of the sensor rim 20 and the metal plate to the front side can be an intermediate step be provided of the second rotor part 22 before the housing cover 55 is placed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

L'invention concerne un procédé pour le montage d'une roue de transmission (20) appartenant à un capteur de position monté sur un dispositif de rotor, le dispositif de rotor présentant un corps de rotor (2, 12, 42) qui est disposé sur un arbre de rotor (1, 11, 41) et qui comprend au moins une partie de rotor (23, 123, 42) servant à produire un champ magnétique excitateur, le procédé comprenant les étapes suivantes : disposer la roue de transmission (20) sur le corps de rotor (2, 12, 42); aligner la roue de transmission (20) par rapport à une position du corps de rotor (2, 12, 42); et fixer la roue de transmission (20) au corps de rotor (2, 12, 42) de telle sorte que la roue de transmission (20) et le corps de rotor (2, 12, 42) soient en contact direct entre eux.
PCT/EP2013/064166 2012-07-25 2013-07-04 Dispositif de rotor pour une machine électrique et palier du dispositif de rotor WO2014016100A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012213075.6A DE102012213075A1 (de) 2012-07-25 2012-07-25 Rotoranordnung für eine elektrische Maschine und Lagerung der Rotoranordnung
DE102012213075.6 2012-07-25

Publications (2)

Publication Number Publication Date
WO2014016100A2 true WO2014016100A2 (fr) 2014-01-30
WO2014016100A3 WO2014016100A3 (fr) 2015-01-08

Family

ID=48745976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/064166 WO2014016100A2 (fr) 2012-07-25 2013-07-04 Dispositif de rotor pour une machine électrique et palier du dispositif de rotor

Country Status (2)

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DE (1) DE102012213075A1 (fr)
WO (1) WO2014016100A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112054625A (zh) * 2019-06-06 2020-12-08 Zf腓特烈斯哈芬股份公司 用于电机的轴

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015206105A1 (de) * 2015-04-02 2016-10-06 Bühler Motor GmbH Magnetgeber
DE102017003100A1 (de) 2017-03-31 2017-10-19 Daimler Ag Sensoreinrichtung, Wellenmessanordnung mit einer eine Mittelachse aufweisenden tordierbaren Welle und einer Sensoreinrichtung. Elektromotor mit einer Sensoreinrichtung und einer eine Mittelachse aufweisenden tordierbaren Welle, und Verfahren zum Ermitteln eines an einer tordierbaren Welle angreifenden Drehmoments mittels einer Sensoreinrichtung

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Publication number Priority date Publication date Assignee Title
DE1949925A1 (de) * 1969-10-03 1971-04-22 Siemens Ag Dauermagneterregte elektrische Maschine
US7126786B1 (en) * 2001-10-01 2006-10-24 Certance Llc Motor/encoder assembly for tape drives
DE10332167A1 (de) * 2003-07-15 2005-02-10 Pwb-Ruhlatec Industrieprodukte Gmbh Encodersystem und Verfahren zur Montage eines Encodersystems

Non-Patent Citations (1)

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Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112054625A (zh) * 2019-06-06 2020-12-08 Zf腓特烈斯哈芬股份公司 用于电机的轴
US11489410B2 (en) * 2019-06-06 2022-11-01 Zf Friedrichshafen Ag Shaft for an electric machine

Also Published As

Publication number Publication date
DE102012213075A1 (de) 2014-01-30
WO2014016100A3 (fr) 2015-01-08

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