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WO2017125273A1 - Moteur électrique à capteur angulaire inductif - Google Patents

Moteur électrique à capteur angulaire inductif Download PDF

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Publication number
WO2017125273A1
WO2017125273A1 PCT/EP2017/050340 EP2017050340W WO2017125273A1 WO 2017125273 A1 WO2017125273 A1 WO 2017125273A1 EP 2017050340 W EP2017050340 W EP 2017050340W WO 2017125273 A1 WO2017125273 A1 WO 2017125273A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
electric motor
coupling element
fixed
inductive
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
Application number
PCT/EP2017/050340
Other languages
German (de)
English (en)
Inventor
Thomas Weingärtner
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.)
Brose Fahrzeugteile SE and Co KG
Original Assignee
Brose Fahrzeugteile SE and Co KG
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 Brose Fahrzeugteile SE and Co KG filed Critical Brose Fahrzeugteile SE and Co KG
Priority to DE112017000419.5T priority Critical patent/DE112017000419A5/de
Publication of WO2017125273A1 publication Critical patent/WO2017125273A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H02K29/12—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using detecting coils using the machine windings as detecting coil
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2066—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by movement of a single coil with respect to a single other coil

Definitions

  • the invention relates to an electric motor, which is designed and suitable in particular for use in a motor vehicle.
  • the electric motor is preferably a brushless (electrically commutated) motor which is designed for high speeds, in particular in the speed range between 3000 and 100,000 revolutions per minute.
  • the electric motor is used in the motor vehicle in particular as a fan motor or as a servomotor for transmission, clutch and the like.
  • Hall sensors are usually used for the rotary position detection in such engines, which cooperate with an attached to an axle end of the motor shaft magnet.
  • Hall sensors are unfavorable for structural reasons, since such a Hall sensor occupies a relatively large amount of space and because due to the magnet end-side mounting of the motor axis is excluded.
  • an inductive sensor for detecting the rotational position of a rotary shaft is known.
  • the known sensor has a fixed inductive element and an inductive coupling element to be mounted on the rotary shaft.
  • Similar inductive sensors are known from DE 197 38 834 A1 and DE 197 38 841 A1.
  • the invention has for its object to provide a structurally advantageous, in particular compact, and easy to implement electric motor, which is provided with a high-resolution rotary position sensor.
  • high resolution is meant a rotary position sensor which detects the rotational position of the rotor with an accuracy of less than 10 degrees, in particular with an accuracy of about one degree (i.e., a fraction of 1/3 of a full turn).
  • the electric motor comprises a stator and a rotor and an inductive angle sensor for detecting the rotational position and / or rotational speed of the rotor.
  • the angle sensor has a stator-fixed inductive element and a rotor-resistant coupling element interacting therewith via a magnetic measuring field.
  • a magnetic measuring field is generated which is received or influenced by the rotor-fixed coupling element.
  • the stator-fixed inductive element has, in an expedient embodiment, at least one transmitting coil or one receiving coil.
  • the stator-fixed inductive element preferably has a combined transmitting and receiving coil or a transmitting coil and one or more separate receiving coils.
  • the rotor-fixed coupling element is expediently a passive inductive one Element which itself is not interconnected with either a transmit circuit or a receive circuit.
  • the rotor-fixed coupling element itself has a transmitting or receiving coil, while the respective counterpart (ie a receiving coil or transmitting coil) is arranged in the stator-fixed inductive element.
  • the inductive sensor is in particular - unless otherwise described below - according to DE 10 2007 021 162 A1, DE 197 38 841 A1 or DE 197 38 834 A1 (or a combination of the design features described therein) formed.
  • the rotor-proof coupling element is fastened directly to the rotor of the electric motor, in particular its rotor laminated core, unlike the known sensors.
  • the inductive coupling element is formed by a part of the rotor, in particular by one or more sheets of the rotor lamination, in particular by one or more edge plates, which close the rotor lamination stack at an axial end.
  • this edge plate or these edge plates are designed, for example, in the geometric shape of conventional coupling elements of inductive sensors, for example in a star shape with radially outwardly widening "beams", as shown in FIGS. 1 and 2 of DE 1 0 2007 021 162 A1 (there Reference numeral 30) is shown.
  • the coupling element is formed by a fixed or flexible printed circuit board, e.g. integrated by gluing or lamination in the rotor or applied to the surface.
  • the coupling element is formed by a stamped-bent part of sheet metal, which is fixed to the rotor of the electric motor.
  • the coupling element is preferably integrated in an axial end face of the rotor or on such Applied on the front side.
  • the coupling element is in particular applied such that it concentrically surrounds the motor axis.
  • the stator-fixed inductive element has, in an expedient embodiment, a printed circuit board which is oriented perpendicular to the motor axis and is pierced by it.
  • the motor shaft is preferably mounted end to a motor housing.
  • FIG. 1 is a side view of an electric motor with an angle sensor having a statorfestes inductive element and thus interacting via a magnetic measuring field rotorfestes inductive coupling element, wherein the rotor-fixed inductive coupling element is formed by a rotor plate,
  • FIG. 2 is a perspective view of the electric motor according to FIG. 1 without the stator-fixed inductive element, FIG.
  • FIG. 3 is a plan view of the stator fixed inductive element of the electric motor of FIG. 1,
  • Fig. 5 is a plan view of another embodiment of the coupling element, which is formed here by a circuit board with a conductor track, and
  • Fig. 6 in plan view another embodiment of the coupling element, which is here formed by a punched-bent part or by a wound wire. Corresponding parts are always provided with the same reference numerals in all figures.
  • FIG. 1 to 3 show a schematic representation of an electric motor 1, which is for use as a servomotor or fan motor in a motor vehicle, for example, as a servomotor for the motor gear, provided and set up.
  • the electric motor 1 comprises a rotating during operation of the electric motor 1 part, which is hereinafter referred to as the rotor 2, and a fixed space in the surrounding part, which is hereinafter referred to as stator 3.
  • the stator 3 is shown in the roughly schematically simplified FIGS. 1 and 2 only partially. Specifically, only two bearings 4 are shown by the stator 3, on which the rotor 2 is rotatably mounted. Furthermore, the stator 3 comprises in a conventional manner an electrical part in the form of a stator winding which is wound onto a laminated stator core, as well as a motor housing. These components are not shown for reasons of clarity in Figs. 1 and 2.
  • the rotor 2 comprises a rotor laminated core 7 formed from a multiplicity of axially stacked rotor laminations.
  • the rotor laminar stack 7 is optionally wound with a rotor winding. Additionally or alternatively, a number of permanent magnets are supported in the rotor laminated core 7. The rotor winding and the permanent magnets are not shown for reasons of clarity in Figs. 1 and 2.
  • the rotor 2 is suspended on the bearings 4 via a motor shaft 5 which defines the axis of rotation of the rotor 2.
  • the motor shaft 5 is mounted in each case end to the bearings 4. In other words, it does not protrude beyond the bearings 4.
  • the electric motor 1 comprises an inductive angle sensor 9, which serves for detecting the rotational position of the rotor 2 relative to the stator 3 and for detecting variables derived therefrom, such as the angle of rotation traveled (rotational travel) or the rotational speed (rotational speed).
  • the win Kelsensor 9 is formed of a stator-fixed inductive element 8 and a cooperating rotor-fixed inductive coupling element. 6
  • the stator-fixed inductive element 8 is formed in the embodiment shown in FIGS. 1 to 3 by a solid (rigid) circuit board 12 with a round outer contour, for example, perpendicular to the motor axis 5 at a predetermined distance from an end face 14 of the rotor 2 in Electric motor 1 is arranged.
  • the circuit board 12 is in this case pushed over the motor shaft 5, so that the motor shaft 5 passes through a central opening 13 of the circuit board 12 with clearance.
  • the stator-fixed inductive element 8 comprises one or more (transmitting and receiving) coils 10, which are applied coaxially to the motor shaft 5 on the circuit board 12 in the embodiment according to FIG.
  • the stator-fixed inductive element 8 comprises a single coil as a combined transmitting and receiving coil 10. Alternatively, electrically separate coils are provided as transmitting and receiving coils 10.
  • the stator-fixed inductive element 8 further comprises a likewise applied to the circuit board 12 electronics 1 1, a transmitting circuit for driving the coils 10 and a receiving circuit for evaluating the caused by magnetic interaction between the stator-inductive element 8 and the coupling element 6 coupling signal.
  • the rotor-fixed inductive coupling element 6 is formed in the embodiment of FIG. 1 to 3 by that rotor plate 15 of the rotor core 7, which closes the rotor core 7 to the end face 14 out.
  • This edge-side rotor plate 15 is provided to form the coupling element 6 with a recognizable in Fig. 2, approximately star or spokes wheel-shaped cutout.
  • the transmitting and receiving coil 10 of the inductive element 8 (or a possibly present separate transmitting coil) by the implemented in the electronics 1 1 transmitting circuit for generating a magnetic field of interest excited.
  • the magnetic measuring field interacts with the coupling element 6, so that a time-varying coupling signal is induced in the transmitting and receiving coil 10 during a rotation of the rotor 2.
  • the receiving circuit implemented in the electronics 1 1 derives the information about the rotational position of the rotor 2, the angle of rotation traveled and / or the rotational speed.
  • FIGS. 4 to 6 show alternative embodiments of the coupling element 6.
  • the coupling element 6 is formed by a punched part of a magnetically excitable (in particular ferromagnetic) metal sheet, which is applied as intended to the end face 14 on the rotor laminated core 7.
  • the coupling element 6 formed by the stamped part is in this case glued in particular to the rotor laminated core 7.
  • the local coupling element 6 has a star or spokes wheel-like shape, which corresponds for example approximately to the negative mold of the rotor plate 15 shown in FIG.
  • the coupling element 6 is formed by a rigid or flexible circuit board 16 (board) on which a closed conductor loop 17 is formed as a conductor track.
  • the conductor loop 17 surrounds a shape which in turn resembles a star or spoked wheel and thus corresponds to the shape of the coupling elements 6 according to FIGS. 2 and 4.
  • the circuit board 16 is applied as intended on the end face 14 of the rotor laminated core 7, in particular glued again.
  • the coupling element 6 is formed from a stamped and bent part made of sheet metal or a bent wire, so that in turn results in a conductor structure with a star or spoke wheel-shaped contour.
  • the conductor structure forms in each projection of this shape (that is to say each star wave or each one) Spoked wheel spoke) from a closed winding 18, each emanating from a radially inner arc and returns to this circular arc.
  • the turns 18 are in this case electrically connected by extending along this inner circular arc connecting pieces 19.
  • the conductor element forming the coupling element 6 according to FIG. 6 is preferably applied directly to the rotor laminated core 7.
  • this conductor structure is applied to a separate carrier, for example made of plastic, or embedded in such a carrier, in which case the carrier with the conductor structure arranged thereon is fastened on the rotor laminated core 7.
  • the coupling elements 6 shown in FIGS. 2 and 4 to 6 are passive inductive elements which are themselves neither connected to a transmitting circuit nor to a receiving circuit, and therefore do not generate a magnetic field, in particular of themselves.
  • the number of projections can be chosen arbitrarily in all the embodiments of the coupling element 6 described above, depending on the desired angular resolution of the angle sensor 9.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)

Abstract

L'invention concerne un moteur électrique (1) conçu en particulier pour être utilisé en tant que moteur de commande ou moteur de ventilateur dans un véhicule automobile. Ce moteur électrique (1) comprend un stator (3) et un rotor (2) ainsi qu'un capteur angulaire inductif (9) pour acquérir la position de rotation et/ou vitesse de rotation du rotor (2). Le capteur angulaire (9) comprend un élément inductif (8) solidaire au stator et un élément de couplage inductif (6) solidaire au rotor qui coopère avec celui-ci par l'intermédiaire d'un champ de mesure magnétique. L'élément de couplage (6) est directement monté sur le rotor (2) ou formé par une partie du rotor (2).
PCT/EP2017/050340 2016-01-19 2017-01-09 Moteur électrique à capteur angulaire inductif Ceased WO2017125273A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112017000419.5T DE112017000419A5 (de) 2016-01-19 2017-01-09 Elektromotor mit induktivem Winkelsensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016200650.9A DE102016200650A1 (de) 2016-01-19 2016-01-19 Elektromotor mit induktivem Winkelsensor
DE102016200650.9 2016-01-19

Publications (1)

Publication Number Publication Date
WO2017125273A1 true WO2017125273A1 (fr) 2017-07-27

Family

ID=57755326

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/050340 Ceased WO2017125273A1 (fr) 2016-01-19 2017-01-09 Moteur électrique à capteur angulaire inductif

Country Status (2)

Country Link
DE (2) DE102016200650A1 (fr)
WO (1) WO2017125273A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021205081A1 (de) 2021-05-19 2022-11-24 Robert Bosch Gesellschaft mit beschränkter Haftung Elektrische Maschine mit einem Rotor und einem Stator, aufweisend eine Vorrichtung zur induktiven Erfassung einer Rotorlage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738841A1 (de) 1997-09-05 1999-03-11 Hella Kg Hueck & Co Induktiver Winkelsensor
DE19738834A1 (de) 1997-09-05 1999-03-11 Hella Kg Hueck & Co Induktiver Winkelsensor für ein Kraftfahrzeug
US5912521A (en) * 1997-11-11 1999-06-15 Allen-Bradley Company, Llc Permanent magnet rotor with shorting turns
DE102007021162A1 (de) 2007-05-05 2008-11-06 Hella Kgaa Hueck & Co. Induktive Winkelsensoreinheit
DE102009052014A1 (de) * 2008-11-06 2010-07-22 AISAN KOGYO K.K., Obu-shi Motorstruktur mit Umdrehungsdetektor
DE202011000228U1 (de) * 2011-01-31 2011-03-31 SUMIDA Components & Modules GmbH Lagegeberelement für induktive Winkelbestimmung in Rotationsmaschinen
US20150303775A1 (en) * 2014-04-21 2015-10-22 Samsung Electronics Co., Ltd. Dc motor including a rotation detection unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738841A1 (de) 1997-09-05 1999-03-11 Hella Kg Hueck & Co Induktiver Winkelsensor
DE19738834A1 (de) 1997-09-05 1999-03-11 Hella Kg Hueck & Co Induktiver Winkelsensor für ein Kraftfahrzeug
US5912521A (en) * 1997-11-11 1999-06-15 Allen-Bradley Company, Llc Permanent magnet rotor with shorting turns
DE102007021162A1 (de) 2007-05-05 2008-11-06 Hella Kgaa Hueck & Co. Induktive Winkelsensoreinheit
DE102009052014A1 (de) * 2008-11-06 2010-07-22 AISAN KOGYO K.K., Obu-shi Motorstruktur mit Umdrehungsdetektor
DE202011000228U1 (de) * 2011-01-31 2011-03-31 SUMIDA Components & Modules GmbH Lagegeberelement für induktive Winkelbestimmung in Rotationsmaschinen
US20150303775A1 (en) * 2014-04-21 2015-10-22 Samsung Electronics Co., Ltd. Dc motor including a rotation detection unit

Also Published As

Publication number Publication date
DE112017000419A5 (de) 2018-10-11
DE102016200650A1 (de) 2017-07-20

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