WO2018001411A1 - Procédé et dispositif pour mesurer une position angulaire pour un système de débrayage avec un détecteur ayant différentes plages de mesure - Google Patents

Procédé et dispositif pour mesurer une position angulaire pour un système de débrayage avec un détecteur ayant différentes plages de mesure Download PDF

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Publication number
WO2018001411A1
WO2018001411A1 PCT/DE2017/100521 DE2017100521W WO2018001411A1 WO 2018001411 A1 WO2018001411 A1 WO 2018001411A1 DE 2017100521 W DE2017100521 W DE 2017100521W WO 2018001411 A1 WO2018001411 A1 WO 2018001411A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
rotor
magnetic field
measuring
stator
Prior art date
Application number
PCT/DE2017/100521
Other languages
German (de)
English (en)
Inventor
Ömer Kochan
Wolfgang Käshammer
Jie Zhou
Original Assignee
Schaeffler Technologies AG & 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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to DE112017003182.6T priority Critical patent/DE112017003182A5/de
Publication of WO2018001411A1 publication Critical patent/WO2018001411A1/fr

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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
    • H02K29/08—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
    • 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
    • F16D28/00—Electrically-actuated clutches
    • 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
    • G01D5/142—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 using Hall-effect devices
    • G01D5/145—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 using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/18—Sensors; Details or arrangements thereof

Definitions

  • the present invention relates to a method for measuring an angular position of a rotor relative to a stator for a clutch release system of a motor vehicle, wherein an electrical sensor for detecting at least one magnet present on the rotor is used so that the angular position of the rotor is detected to the stator and a Rotor bearing sensor assembly for a Kupplungsaus Wegungs- system, with a relative to a startable rotor, wherein at the start of an electric sensor is mounted, which is prepared for detecting a caused by the at least one magnet magnetic field.
  • the invention also relates to a clutch release system.
  • a rotor position sensor of an electronically central disengager is used as a basic measuring device in the commutation of an engine or the positioning of a clutch.
  • This essentially comprises a magnet ring / magnetic encoder ring with several pole pairs as well as two analogue Hall sensors and three Switch Hall sensors.
  • DE 10 2014 218 544 A1 discloses a sensor unit for determining a rotor position of an electric motor and an electric motor, preferably for a clutch actuator of a clutch actuation system of a motor vehicle, which relates to a sensor unit for determining a rotor position of an electric motor which comprises at least one magnetic field sensor. which is fastened on a carrier element.
  • the carrier element is positioned in a sensor housing which is open on one side and has a sensitive surface of the at least one magnetic field sensor in the direction of the open-form side of the sensor housing.
  • a rotor position sensor for an electronically commutated electrical machine with a reference encoder is known. It relates to a rotor position sensor for a stator and a rotor having electronically commutated electrical machine comprising a stator rotatably mounted on the stator motor rotor position sensor for detecting the rotational position of the rotor relative to the magnetic field of the stator and a rotatably mounted on the rotor signal generator.
  • the rotor position sensor disclosed therein is characterized in that it has a reference transmitter for detecting reference values of the magnetic flux density of the rotor field, the reference values serving for determining an angular offset between the signal generator and the position of the rotor.
  • the object of the invention to eliminate or at least mitigate the disadvantages of the prior art and, in particular, to provide a method and a device which requires less space with good mounting capability and measures precisely. Furthermore, a method for electronically compensating an axial offset of an analog Hall sensor is to be provided.
  • the object of the invention is achieved in a generic method in that the sensor has different / variable measuring ranges or measuring stages, from which a measuring range or a measuring stage is preset to the magnetic field acting on the sensor / preselected.
  • any disclosure in the context of the inventive method for measuring an angular position for a clutch release system for a vehicle also applies to the inventive device for measuring an angular position for a clutch release system for a vehicle, as well as any disclosure in connection with the inventive device for measuring an angular position for a clutch release system for a vehicle also applies to the method according to the invention for measuring an angular position for a clutch release system for a vehicle.
  • such a measuring range which covers the magnetic field acting on the sensor to approximately or exactly 100% of its strength or approximately / exactly (120% or) 140% of its strength.
  • the entire magnetic field can be detected and processed by the sensor without a detection area being cut off or not taken into account due to the limited detection of the magnetic field by a sensor.
  • the measuring signal is given a certain amount of leeway, so that the maximum amplitude of the magnetic field does not have to exploit the maximum of the measuring range.
  • this feature accounts for the setting of a sensor to have a manufacturer-specified diagnostic range which should not be used, i. An amplitude of a measured signal just would not lie in a measuring range of the sensor reserved as a diagnosis area.
  • the individual selectable and adjoining measuring ranges overlap by at least 50%. This will create a derte resolution of an output signal ensures. It can thus be switched from one measuring range to the next measuring range, in other words, the measuring range can be selectively changed without falling below a required resolution for a given strength of a magnetic field at a measuring range.
  • the electrical sensor may also have two, three, four, and in particular five or more Hall sensors. Hall sensors are widely used, inexpensive and have a small space requirement. These Hall sensors are available in various variants and various specifications, which in the present invention are in particular in a measuring range between +/- 6 mT and +/- 200 mT.
  • the analog Hall sensor has at least six variable measuring ranges.
  • the measuring range of the Hall sensor can also have other measuring ranges and a different number of measuring range settings. It may, for example, also have a lower limit of +/- 1 mT and / or an upper limit of +/- 1 T.
  • the number of measuring ranges may in particular be three, four, five, six, ten, twenty or more. It has proved to be advantageous if the measuring range or the measuring stage is selected as a function of the distance of the electrical sensor to the magnet defined in the longitudinal direction of the coupling release system.
  • the magnetic field of a magnet decreases over the distance, usually non-linearly. An amplitude of a magnetic field measured by the sensor, in which the distance between the electrical sensor and the magnet is smaller, is therefore greater than an amplitude of a magnetic field measured by the sensor, in which the distance between the electrical sensor and the magnet is greater.
  • a sensor with a large measuring range for example +/- 200 mT
  • a sensor with a small measuring range for example + / - 6 mT
  • the amplitude of the magnetic field becomes smaller at an increasing distance.
  • a single electrical sensor can adjust the measuring range according to the magnetic field.
  • the invention also relates to a device for measuring an angular position for a clutch release system with a sensor having different measurement ranges.
  • the object of the invention is achieved in a generic rotor position sensor assembly for a clutch release system, characterized in that the electrical sensor has different selectively selectable measuring ranges, one of which is selected depending on the magnetic field acting on the sensor.
  • the electrical sensor is fastened from an end face of a carrier on the carrier or a stator-fixed component, engages in or passes through in order to come into operative contact with the at least one magnet and the rotor from an opposite Front side of the carrier / carrier component statornah and sensornah arranged / mounted.
  • this arrangement allows mounting from one end face of a carrier, wherein the rotor is arranged on the opposite end face of the carrier. Replacement in the event of a defect or maintenance is thus easier.
  • a complete seal against the rotor space can be achieved.
  • an advantageous embodiment provides that a plurality of magnets arranged distributed in the circumferential direction are used, which preferably form a magnetic ring / magnetic encoder ring, for example with an alternating polarity in the circumferential direction.
  • continuous reference values can be made available during operation of the electric motor.
  • an angular offset can be determined, which can be taken into account in a commutation.
  • the electrical sensor has a circuit board, wherein on a side facing the rotor of the board a plurality (in particular two, three, four, five or more) digital switch Hall sensors are arranged and / or on one of Rotor remote side of the board a plurality (in particular two, three, four or more) Hall sensors are arranged.
  • the plane of the board here represents a normal to the axis of rotation of the rotor.
  • the mounted on the board Hall sensors therefore detect the best possible magnetic field of the magnet ring.
  • the board of the sensor assembly has a sensor Endumspritzung, which also serves as a seal against the side of the rotor and the board against the environment fluid-tight manner. Due to the final encapsulation of the electrical sensor, a desired distance to the magnet can also be set (co-).
  • a Kupplungsaus Wegsystem with a rotor position sensor assembly.
  • This rotor position sensor assembly requires little space in the clutch release system and precisely measures an angular position.
  • the rotor position sensor assembly is used in an electrical central release (EZA) of a clutch release system.
  • the invention relates to a method for electronically compensating an axial offset of an analog Hall sensor and a corresponding device.
  • a distance between an analog Hall sensor and a magnetic ring within a first predetermined range in particular in a range of about 3.3 mm +/- 1 mm, resulting in a corresponding strength of a Magnetic field within a second predetermined range, in particular in a range of about 22 - 60 mT leads.
  • an analogue Hall sensor with a variable measuring range is used. More specifically, the variable measuring range has a plurality of measuring stages, wherein adjacent measuring stages overlap each other by a predetermined height.
  • FIG. 1 shows a rotor position sensor assembly in an electrical central release
  • FIG. 3 shows a rotor position sensor assembly with final encapsulation of the electrical sensor
  • FIG. 4 shows a diagram of a magnetic field as a function of the distance from a magnet to the sensor
  • FIG. 5 shows a table of the sensor with a variable measuring range
  • FIG. 6 is a diagram illustrating an output signal versus the angle of a rotor position sensor assembly.
  • the figures are schematic in nature and are intended only to aid understanding of the invention. Like elements are provided with the same reference numerals.
  • FIG. 1 shows a rotor position sensor assembly 1 according to the invention for a clutch release system 2, which is incorporated in an electrical central release (EZA), with a rotatable relative to a stator 3 rotor 4, wherein the rotor 4 has a magnetic ring 5, in operative contact with the on Stator 3 introduced electrical sensor 6 of the rotor position sensor assembly 1 is.
  • EZA electrical central release
  • the electrical sensor 6 has a changeable measuring range.
  • the stator 3 On the (EZA) support 9, the stator 3 is arranged circumferentially.
  • the Rotor 4 actuates a release system in the axial direction of the rotor 4 via its rotary motion via a ball screw drive. It can be seen from the structure that the sensor assembly 1 can be inserted from the end face of the carrier.
  • FIG. 2 shows an illustration of the construction of a rotor position sensor assembly 1 for a clutch release system 2, without Endumspritzung 7 of the electrical sensor 6.
  • a rotor position sensor assembly 1 for a clutch release system 2, without Endumspritzung 7 of the electrical sensor 6.
  • the curved board 10 on whose top side (or the rotor side facing) three digital switch Hall Sensors 1 1 are applied, as well as on the underside of the board (or the side facing away from the rotor) two analog Hall sensors 12 are. It can be seen in the bent board 10, the bending point of the board 14, whereby these, in particular by substantially 90 °, angled / can be bent.
  • the curved board 10 has a pluggable connection 17, which can be connected / connected to the sensor cable 16 in the sensor carrier 13. On the left and right of the sensor carrier 13 one sees in each case insert bushes for screws 15 with which, as can be seen in FIG. 1, the rotor position sensor assembly 1 can be fastened in the carrier 9.
  • FIG. 3 shows the rotor position sensor assembly 1 with a final sensor encapsulation 7.
  • the circumferential sensor seal 8 in particular a rubber seal, seals the sensor assembly from the rotor side.
  • Fig. 4 shows a diagram of a magnetic field characteristic M.
  • This shows the magnetic field strength as a function of the distance magnet to electric sensor.
  • the curve M which shows the corresponding correlation, the (non-linear) decrease of the magnetic field strength B over the distance A can be clearly seen.
  • a distance from the sensor to the magnet can also be estimated on the basis of a magnetic field.
  • the present embodiment of the rotor position sensor assembly for a clutch release system has a distance of in particular 3.3 mm with a tolerance of +/- 1 mm. Based on the magnetic field characteristic M of the diagram in FIG.
  • Fig. 5 shows a table for a variable-range sensor used in the embodiment.
  • the Hall sensor micronas company called Hal2455 is used as an electrical sensor.
  • This sensor has six possible settings S1, whereby the measuring range S2 can be varied between +/- 6 mT and +/- 200 mT.
  • the sensor works internally with 16 bit S3, whose high bit S3.1 and low bit S3.2 are selected for processing according to the table.
  • the output in the form of pulse width modulation (PWM) uses 12 bits (PWM) S4. For output, the high bit S4.1 and low bit S4.2 are set accordingly.
  • PWM pulse width modulation
  • the resolution can be read in S4.3 and the accuracy in S4.4.
  • an overlap of a valid measuring range to the next stage must be greater than 50% under all conditions.
  • the measured signals are also calibrated in a Digital Signal Process (DSP), whereby a resolution of the angle detection of 0.5 ° is a prerequisite for such a calibration.
  • DSP Digital Signal Process
  • an area of low resolution AU is symmetrical to 50% PWM, with an extension of 6.25% each of the PWM signal, ie a total of 12.5% of the PWM signal.
  • Symmetrical to the 50% PWM signal the amplitudes of the evaluated positive and negative (or direction-dependent north-south or south-north of the magnetic field) are magnetic fields, which are converted into a corresponding PWM signal.
  • a signal S with a correspondingly adjusted measuring range of the sensor, is shown as an example over the angle.
  • a diagnostic range D can be seen in the range of 90 to 100% PWM or from 0 to 10% PWM.
  • These two diagnostic areas D are reserved by the manufacturer for diagnostic purposes and can not be used to measure an angular position.
  • a range extends to low resolution AU. In this range of 12.5% of the PWM signal, the resolution of the angle detection is too poor. If the amplitude of a corresponding PWM signal lies within this range, then the measuring range of the electrical sensor must be changed over to a next measuring range, until the amplitude is above, or below, the too low resolution AU.
  • the valid measuring ranges ME lie between the diagnosis ranges D and the too low resolution AU. These valid measuring ranges ME are to be used for the angle evaluation, i. H.
  • all maxima of the signal should be in the upper green range, while all minima of the signal are in the lower green range.
  • the 50% overlap should be understood as meaning that the sum of all valid ranges should be greater than 40% of the PWM signal.
  • the sum of the valid measuring ranges is equal to 50% less the diagnostic range D.
  • the magnetic field changes reversibly with the temperature (about 15%). This reversible change is, to a first approximation, linear and corresponds to a constant increase and decrease per degree Celsius. Furthermore, in the case of rare earth magnets under elevated temperature and in the case of ferrites at low temperature, partial demagnetization may occur (approx. 15%). This leads to a change in the magnetic field when the temperature is first reached. The loss is no longer compensated by the return of the temperature and is therefore irreversible.
  • an offset of the signal may occur due to a mechanical-electrical conversion of the sensor signal (approx. 4%). A tumbling motion of the rotor would also cause signal degradation (about 8%). These technical influences described above This can cause the 40% limit to be exceeded quickly, and the system will provide a worse signal or resolution. To counter this, the following measures should be used. In order to reduce or prevent the reversible or irreversible magnetic loss, a proportion of additional dysprosium (Dy) or cobalt (Co) can be added to the magnetic material (about 5%). Likewise, a pre-aging process can be performed to stabilize the magnetic field (about 10%).
  • Dy dysprosium
  • Co cobalt

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

L'invention concerne un procédé permettant de mesurer la position angulaire d'un rotor (4) relativement à un stator (3) pour un système de débrayage (2) d'un véhicule à moteur, selon lequel un capteur (6) électrique destiné à détecter au moins un aimant (5) situé sur le rotor (4) est utilisé de sorte que la position angulaire du rotor (4) par rapport au stator (3) est enregistrée, ledit capteur (6) présentant différentes plages de mesure dont une est préréglée de manière ciblée sur le champ magnétique (5) agissant sur le capteur (6). L'invention concerne également un module de détection de position de rotor (1) pour un système de débrayage (2), présentant un rotor (4) pouvant tourner relativement à un stator (3), un capteur (6) électrique qui est monté sur le stator (3) et est destiné à détecter un champ magnétique généré par ledit au moins un aimant (5), le capteur (6) électrique présente différentes plages de mesure pouvant être sélectionnées de manière ciblée, dont une est choisie en fonction du champ magnétique agissant sur le capteur. L'invention concerne en outre un système de débrayage (2) doté d'un module de détection de position de rotor (1) selon l'invention.
PCT/DE2017/100521 2016-06-27 2017-06-21 Procédé et dispositif pour mesurer une position angulaire pour un système de débrayage avec un détecteur ayant différentes plages de mesure WO2018001411A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112017003182.6T DE112017003182A5 (de) 2016-06-27 2017-06-21 Verfahren und Vorrichtung zum Messen einer Winkellage für ein Kupplungsausrücksystem mit einem Sensor mit unterschiedlichen Messbereichen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016211448.4 2016-06-27
DE102016211448.4A DE102016211448A1 (de) 2016-06-27 2016-06-27 Verfahren und Vorrichtung zum Messen einer Winkellage für ein Kupplungsausrücksystem mit einem Sensor mit unterschiedlichen Messbereichen

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WO2018001411A1 true WO2018001411A1 (fr) 2018-01-04

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WO (1) WO2018001411A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1481846A1 (fr) * 2003-05-27 2004-12-01 Valeo Vision Dispositif projecteur muni d'un système de détermination de position ou de variation de position
DE202005016726U1 (de) * 2005-10-24 2007-03-01 Rema Lipprandt Gmbh & Co. Kg Fahrschalter zur Steuerung eines Fahrantriebs eines kraftgetriebenen Flurförderzeugs
DE102013203388B3 (de) 2013-02-28 2014-03-20 Schaeffler Technologies AG & Co. KG Rotorlagegeber für eine elektronisch kommutierte elektrische Maschine mit einem Referenzgeber
US20140184209A1 (en) * 2012-12-27 2014-07-03 Denso Corporation Position detector
DE102014218544A1 (de) 2014-09-16 2016-03-17 Schaeffler Technologies AG & Co. KG Sensorikeinheit zur Bestimmung einer Rotorlage eines Elektromotors und ein Elektromotor, vozugsweise für einen Kupplungsaktor eines Kupplungsbetätigungssystems eines Kraftfahrzeuges

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1481846A1 (fr) * 2003-05-27 2004-12-01 Valeo Vision Dispositif projecteur muni d'un système de détermination de position ou de variation de position
DE202005016726U1 (de) * 2005-10-24 2007-03-01 Rema Lipprandt Gmbh & Co. Kg Fahrschalter zur Steuerung eines Fahrantriebs eines kraftgetriebenen Flurförderzeugs
US20140184209A1 (en) * 2012-12-27 2014-07-03 Denso Corporation Position detector
DE102013203388B3 (de) 2013-02-28 2014-03-20 Schaeffler Technologies AG & Co. KG Rotorlagegeber für eine elektronisch kommutierte elektrische Maschine mit einem Referenzgeber
DE102014218544A1 (de) 2014-09-16 2016-03-17 Schaeffler Technologies AG & Co. KG Sensorikeinheit zur Bestimmung einer Rotorlage eines Elektromotors und ein Elektromotor, vozugsweise für einen Kupplungsaktor eines Kupplungsbetätigungssystems eines Kraftfahrzeuges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
A. NONIMOUS: "HAL2455 - Hardware Documentation High-Precision Programmable Linear Hall-Effect Sensor with PWM Output Data Sheet", 14 January 2016 (2016-01-14), Freiburg, Germany, XP055418522, Retrieved from the Internet <URL:https://www.micronas.com/en/system/files/downloads/files/HAL_2455_High-Precision_Programmable_Linear_Hall-Effect_Sensor_with_PWM_Output.pdf> [retrieved on 20171024] *

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DE102016211448A1 (de) 2017-12-28
DE112017003182A5 (de) 2019-03-07

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