EP3420315A1 - Capteur d'angle de rotation - Google Patents

Capteur d'angle de rotation

Info

Publication number
EP3420315A1
EP3420315A1 EP16826067.7A EP16826067A EP3420315A1 EP 3420315 A1 EP3420315 A1 EP 3420315A1 EP 16826067 A EP16826067 A EP 16826067A EP 3420315 A1 EP3420315 A1 EP 3420315A1
Authority
EP
European Patent Office
Prior art keywords
rotor
stator
coil
rotation
crescent
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Withdrawn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
EP16826067.7A
Other languages
German (de)
English (en)
Inventor
Fabian Utermoehlen
Andreas Merz
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.)
Robert Bosch GmbH
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 EP3420315A1 publication Critical patent/EP3420315A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01D5/2086—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 two or more coils with respect to two or more other coils
    • 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
    • G01D5/2073—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 two or more coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/325—Windings characterised by the shape, form or construction of the insulation for windings on salient poles, such as claw-shaped poles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
    • H05K1/183—Components mounted in and supported by recessed areas of the printed circuit board
    • 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
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70—Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/77—Specific profiles
    • 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
    • G01D5/2046—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 a movable ferromagnetic element, e.g. a core
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings

Definitions

  • the invention relates to a rotation angle sensor, with the example, a rotation angle between a shaft and another component can be determined.
  • rotational angle sensors In order to measure rotational angles, for example, rotational angle sensors are known in which a magnet is rotated via a corresponding magnetic field sensor. The measurement of the magnetic field vector then allows a conclusion about the angle of rotation. Such sensors also respond to external magnetic fields, which are caused for example by a current flow of adjacently arranged power cables and can be very susceptible to interference.
  • rotation angle sensor uses an eddy current effect.
  • a metallic target is moved over sensor coils, which with a
  • the coils are part of a resonant circuit whose resonant frequency shifts when the inductance changes.
  • the type of rotation angle sensor can have a high cross sensitivity to installation tolerances (especially a tilting of the target). Also, the frequency generated by external electromagnetic fields
  • EP 0 909 955 B1 shows a rotation angle sensor with planar conductor loops short-circuited on a target, which interact with the alternating electromagnetic field of an exciter coil.
  • Embodiments of the present invention may advantageously enable a robust, inexpensive, and low installation space
  • the invention relates to a rotation angle sensor, in particular in a
  • the rotation angle sensor may be used in the engine compartment or in the vicinity of the engine compartment of a vehicle, for example, to determine a position of a throttle valve; a rotor position of a BLDC motor, a position of an accelerator pedal or a position of a camshaft.
  • the rotation angle sensor described below is inexpensive, requires a small space and is based on a simple measuring principle.
  • the rotation angle sensor comprises a stator element with a stator end coil and at least one
  • Statorempfangsspule a rotor member rotatably supported relative to the stator member about an axis of rotation and having a rotor receiving coil and a rotor sending coil electrically connected to each other;
  • Rotor receiving coil is inductively coupled to the Statorsendespule, so that an electromagnetic field generated by the Statorsendespule in the
  • a rotor receiving coil induces a current flowing through the rotor sending coil so that the rotor sending coil generates another electromagnetic field; wherein the at least one stator receive coil is inductively coupled to the rotor transmit coil so that the inductive coupling is dependent on a rotational angle between the stator element and the rotor element, and the electromagnetic field generated by the rotor transmit coil induces at least one angle-dependent AC voltage in the at least one stator receive coil.
  • stator end coil can be acted upon by an alternating voltage which, via an inductive coupling of the stator end coil with the rotor-receiving coil in the rotor-receiving coil, has an additional voltage
  • AC voltage produces a current flow in the rotor-end coil that is coupled to one or more of them via inductive coupling of the rotor-end coil
  • Statorempfangsspulen in the stator or the receiving coils generates another AC voltage that can be measured and from their
  • Measured values a relative angle of rotation between the stator and the rotor element can be determined.
  • the at least one stator-receiving coil has at least two (or an even number of) circular-sector-shaped partial turns, which form the
  • a circular sector shaped Operawindung may be circular sector-shaped (for example, a semicircle or a quarter circle). It may also be in the form of a sector of a ring, i. a portion of a ring bounded by the two circular lines of the ring and by two radial lines.
  • each partial turn of the stator receive coil is associated with a partial turn of the rotor transmit coil so that each partial turn of the rotor transmit coil in the associated partial turn of the stator receive coil can induce an alternating field.
  • At different angles of rotation results in a
  • the amplitude of the alternating voltage depends on the overlap area of the crescent-shaped partial turns and the circular-sector-shaped partial turns. This overlap area can be adjusted by the shape of the crescent-shaped partial turns. Because with a sickle shape the
  • Covering surface does not increase linearly with the angle of rotation, the functional dependence of the amplitude of the AC voltage on the rotation angle can be adjusted by the shape of the sickles.
  • a circular sector-shaped Operawindung can two circular arc
  • a circular sector-shaped partial turn is circular sector-shaped, that is, only has a circular-arc-shaped conductor section, which is connected to two radially almost to the axis of rotation extending conductor sections.
  • a circular-sector-shaped partial turn can also be semicircular.
  • the inner radius of the annulus sector defining the partial turn may preferably be 5%, not more than 15%, of the outer radius of the annulus sector.
  • the rotation angle sensor is based on a simple measuring principle and can also be realized inexpensively, since no expensive magnet on the
  • Rotor element is needed. Due to the arrangement and shape of the coils, it requires less space. Further, the rotation angle sensor is robust to structural tolerances, which costs can be saved. According to one embodiment of the invention, the crescent-shaped
  • Statorempfipsspule induced AC voltage from the rotation angle a sine function.
  • a sinusoidal signal dependent on the angle of rotation can easily be evaluated and converted into the angle of rotation.
  • the rotational angle can be determined by means of the arctangent from the quotient of the two signals.
  • three stator receiving coils three-phase system
  • the rotation angle can be adjusted by means of a Clarke transformation of the three signals and then
  • the partial turns of the stator-receiving coil and the partial turns of the rotor-transmitting coil may each be arranged symmetrically about the axis of rotation.
  • the partial windings of the stator receiving coil and / or the partial windings of the rotor end spool can also be made substantially identical or identical. In this way, the alternating voltages induced per partial turn pair are the same.
  • the rotor end coil is constructed of two equal-sized crescent-shaped partial turns.
  • the diameters of the circular-arc-shaped or circular conductor sections of a partial turn can deviate from one another by less than 10%.
  • the circles defining the conductor sections can have the same diameter. This advantageously results in a high signal balance and a simple recalculation.
  • the centers of the circles defining the conductor sections may be offset from each other by approximately 5% of the mean diameter of the two circles.
  • the rotor end coil is made of four equal sized, e.g. constructed with respect to the area of equal, crescent-shaped Partwindungen and the ratio of the diameter of the
  • Circular-shaped or circular conductor sections of a partial turn deviate by less than 10% from the root of 2 (approximately 1.41). This causes internal conductor track sections to pass into outer track sections of the adjacent sickle. This results in a particularly advantageous high
  • Sinusoidality of the signals Deformation of the signals e.g. in the direction of a triangular function is thereby avoided.
  • the centers of the signals e.g. in the direction of a triangular function is thereby avoided.
  • circles defining conductor sections may vary from 1/6 to 1/2, e.g. about 1/4, the larger radius to each other.
  • the circular-sector-shaped partial windings of the stator receiving coil and the crescent-shaped partial windings of the rotor-end coil each have an opposite orientation in the circumferential direction with respect to a current passing through them.
  • circumferentially adjacent crescent part-turns of the rotor-end coil generate electromagnetic fields substantially antiparallel to each other.
  • the crescent-shaped partial turns are arranged only in an annular region of the rotor element surrounding the axis of rotation. In this way, on the rotor element, a surface which surrounds the axis of rotation and for further functions of the
  • Rotor element can be used.
  • the ring area can be defined by two concentric circles around the axis of rotation with different radii.
  • the rotor receiving coil can be arranged in an inner region of the rotor element surrounding the axis of rotation, and the crescent-shaped partial turns can surround this inner region.
  • the rotor receiving coil and / or the stator end coil rotate the axis of rotation of the rotation angle sensor circular, wherein the axis of rotation may also be the center of the circles defining the coils.
  • a particularly homogeneous magnetic field is advantageously generated (stator end coil) or the largest possible portion of the generated field is received (rotor receiving coil).
  • the rotor end coil and the at least one stator receiving coil each have an even number of partial turns.
  • the two coils can in each case have the same number of partial coils oriented in one direction and in the other direction, so that external interference fields can be completely eliminated.
  • the signal received in a stator receiving coil can thus essentially be a sine function or cosine function oscillating around the zero line as a function of the angle of rotation. This will be the
  • Evaluation can e.g. by means of a discretely constructed circuit or with a very simple processor.
  • a rotor end coil is to be understood as meaning “at least one rotor end coil”. This applies analogously to the stator receiving coil, the
  • Statorsendespule and the rotor receiving coil Statorsendespule and the rotor receiving coil.
  • stator element on two stator receiving coils, which are offset in the circumferential direction by 90 ° to each other; or wherein the stator element has three stator receiving coils, which are offset in the circumferential direction by 120 ° to each other.
  • a plurality of stator receiving coils, each providing its own signal, can be
  • Differential signals are not included in the measurement due to external interference induced voltages because they act similarly on all signals.
  • a differential signal can be evaluated.
  • three stator receiving coils three differential signals can be evaluated.
  • the stator end coil and the at least one stator receiving coil are planar coils disposed in and / or on a stator circuit board.
  • the rotor receive coil and the rotor transmit coil may be planar coils disposed in and / or on a rotor circuit board.
  • the elements of the rotation angle sensor can be constructed of easily manufactured components.
  • the coils can be formed in a single layer of a printed circuit board or in two layers of a printed circuit board, wherein the printed conductors in the two layers can be connected to one another by vias (plated-through holes). As a result, a particularly easy réelledes and inexpensive circuit board design can be used.
  • Fig. 1 shows schematically a rotation angle sensor according to an embodiment of the invention.
  • Fig. 2 shows schematically a stator element for a rotation angle sensor according to an embodiment of the invention.
  • 3 schematically shows a rotor element for a rotation angle sensor according to an embodiment of the invention.
  • FIG. 4 shows a diagram in which the geometric relationships of the rotor element from FIG. 3 are explained.
  • Fig. 5 shows schematically a rotor element for a rotation angle sensor according to another embodiment of the invention.
  • Fig. 6 shows schematically a stator element for a rotation angle sensor according to another embodiment of the invention.
  • Fig. 7 schematically shows a stator element for a rotation angle sensor according to another embodiment of the invention.
  • Fig. 8 schematically shows a rotor element for a rotation angle sensor according to another embodiment of the invention.
  • FIG. 9 shows a diagram in which the geometric relationships of the rotor element from FIG. 8 are explained.
  • FIG. 10 schematically shows a rotor element for a rotation angle sensor according to another embodiment of the invention.
  • Fig. 1 shows a rotation angle sensor 10 of a stator 12 and a rotor member 14.
  • the rotor member 14 may on a shaft 16 of a component, such as a throttle valve, an engine, a camshaft, a
  • Acceleration pedal, etc. be attached or provided by this shaft 16.
  • the shaft 16 is rotatable about the axis A and the stator 12 is the
  • stator element 12 is attached to a housing of the component.
  • the stator element 12 comprises a stator printed circuit board 18 on which a
  • the stator board 18 may be a single-layer, two-layer or multi-layer stator board 18, and the conductors of the coils 20, 22 may be located on both sides of the stator board 18 and between the individual layers of the stator board 18.
  • a control unit 24 On the stator circuit board 18, further components for a control unit 24 may be located.
  • the control unit 24 can supply the stator transmitter coil 20 with an alternating voltage (for example with a frequency between 1 MHz and 20 MHz, for example 5 MHz, and / or with a voltage amplitude in the range of 0.5 V to 10 V, for example 1.5 V) and in each stator receiving coil 22 an induced
  • Control unit 24 determine a relative angle of rotation between the stator 12 and the rotor element 14.
  • the rotor element 14 comprises a rotor circuit board 26.
  • a rotor receiving coil 28 and a rotor end coil 30 are arranged on the rotor circuit board 26.
  • the rotor circuit board 26 may be a single-layer, two-layer or multi-layer circuit board, and the conductors of the coils 28, 30 may be located on both sides of the rotor circuit board 26 and between the individual layers of the rotor circuit board 26.
  • Typical outer dimensions (such as diameter) of the stator transmit coil 20, the stator receive coils 22a, 22b, the rotor receive coil 28 and the rotor transmit coil 30 are between 4 mm and 50 mm (preferably 12 mm).
  • FIG. 2 shows a stator element 12 for the rotation angle sensor 10 of FIG. 1 in plan view, which comprises a stator end coil 20 and two stator receiving coils 22a, 22b.
  • the stator end coil 20 is substantially circular, with the axis A being the center of the stator end coil 20 and surrounding it
  • Statorempfangsspule 22a, 22b are offset by 90 ° along the circumference to each other and each have two opposite partial turns 32a, 32b (which are provided only with the coil 22a with reference numerals).
  • Partial turns 32a, 32b is circular sector-shaped and in particular almost
  • Partial turn 32a is connected to turn 32b (with respect to FIG.
  • the two partial turns 32a, 32b of a stator receiving coil together substantially cover the entire surface which is circulated by the stator end coil 20. As a result, a particularly high received signal can be effected.
  • FIG. 3 shows a rotor element 14 for the rotational angle sensor 10 from FIG. 1 in plan view, which comprises a rotor receiving coil 28 and a rotor transmitting coil 30.
  • the rotor receiving coil 28 is substantially circular or
  • axis A represents the center of the stator end coil 20, and surrounds the rotor end coil 30 completely.
  • Rotor receiving coil 28 and rotor sending coil 30 are electrically connected at their ends, e.g. short-circuited or connected in series.
  • the rotor receiving coil 28 may have the same area as the
  • stator coil 20 Rotate stator coil 20 and / or aligned with this with respect to the axis of rotation A.
  • the geometries of the stator transmit coil 20 and the rotor receive coil 28 may be identical. It is also possible that the Statorsendespule 20 and the rotor receiving coil 28 in the diameter and / or in the number of
  • the stator end coil 20 has two, three, four or more same direction loop conductors to produce a high alternating field.
  • the rotor spool 30 has two opposite partial turns 34a, 34b, each of which is sickle-shaped.
  • the first part winding 34a is the second
  • Partial turn 34b (with respect to the current flow) oriented in opposite directions.
  • Geometries of the partial convolutions 34a, 34b can be identical.
  • Partial turns 34a, 34b are located in a ring region 36, which the
  • Rotary axis A surrounds, and are disposed outside of an inner region 38 which is not covered by the Rotorsendespule 30.
  • the two crescent-shaped partial convolutions 34a, 34b are formed from substantially circular-arc-shaped conductor sections 40a, 40b, which are located on the
  • Transition point between the crescent-shaped Operawindungen 34a, 34b cross over.
  • the partial windings 34a, 34b may be arranged in different positions of the rotor circuit board 26.
  • the control unit 24 applies an alternating voltage to the stator end coil 20, an alternating electromagnetic field is produced which can be received by the rotor receiving coil 28 and induces a voltage there which generates a current flow.
  • the distance between the stator circuit board 18 and the rotor circuit board 26 can be selected so that the stator circuit board 18 is in the near field of the rotor circuit board 26.
  • the electromagnetic field of the stator end coil 20 may be in the
  • Statorempfangsspulen 22a, 22b and the Rotorsendespule 30, due to the opposing Operawindungen 32a, 32b and 34a, 34b induce substantially no current flow.
  • the current induced in the rotor receiving coil 28 also flows through the rotor sending coil 30, which thereby generates with its partial windings 34a, 34b two oppositely oriented electromagnetic alternating fields.
  • stator receiving coils 22a, 22b which depends on the relative rotational angle of the stator element 12 to the rotor element 14 for each of the stator receiving coils 22a, 22b.
  • the alternating current induced in the stator receiving coils 22a, 22b depends on
  • AC voltage as a function of the angle of rotation can be adjusted with the choice of the geometry of the crescent-shaped partial turns 34a, 34b.
  • the amplitude of the induced AC voltage may be dependent on the sine of the rotation angle. This facilitates the evaluation of the signal generated by the stator receiving coils 22a, 22b.
  • FIG. 4 shows a diagram which explains the geometry of the rotor end coil 30 and its partial turns 34a, 34b.
  • the circular-arc-shaped conductor sections 40a, 40b are defined by two circles with the diameters D1 and D2
  • the two diameters Dl and D2 can be chosen approximately identical.
  • the distance x can be obtained
  • the diameters are approximately between 4 mm to 20 mm and preferably 12 mm.
  • Stator element 12 of FIG. 2 can be used.
  • the rotor receiving coil 30 is disposed inside the rotor sending coil 28.
  • the rotor receiving coil 30 is located in the inner region 38 within the annular region 36.
  • the crescent-shaped partial turns 34a, 34b of the rotor-end coil 28 allow the inner region 38 to be used in order to integrate the rotor-receiving coil 30 there. This may have the advantage that on the one hand the rotor element 14 can be made smaller and less expensive and on the other hand that the amplitude of the alternating voltage induced in the rotor receiving coil 28 does not depend on lateral displacements between the rotor element 14 and the rotor
  • Stator element 12 depends.
  • FIG. 6 shows a further embodiment of a stator element 12 which can be used together with the rotor elements 14 of FIGS. 3 and 5.
  • the stator element 12 includes a first stator receive coil 22a, a second stator receive coil 22b, and a third stator receive coil 22c that are 120 ° apart (and that each may be the same as the stator receive coils 22a, 22b of FIG. 2).
  • Stator element 12 three different AC voltages (approximately signal, signal2, signal3) induced, thus leading to a three-phase signal that can be evaluated.
  • signal2, signal2 signal3 and signal3 signal By evaluating the differences signal signal2, signal2 signal3 and signal3 signal, an existing offset can be compensated and a higher sine wave form can be achieved.
  • the recalculation into the rotation angle can be carried out simply and robustly by means of a Clarke transformation.
  • Stator elements 12 and rotor elements 14 are constructed, have a Periodicity or a measuring range of 360 °. Since no 360 ° periodicity is required for many applications, such as the rotation angle detection of a throttle valve, variants with a 180 ° periodicity are described in FIGS.
  • FIG. 7 shows a stator element 12 with a stator receiving coil 22a, which consists of four similar annular sector-shaped (here
  • the stator element 12 may include other stator receiving coils constructed like the stator receiving coil 22a and offset from each other by the stator receiving coil by a predetermined angle, as explained below. For example, with two stator receiving coils 22a, the two stator receiving coils 22a
  • a stator receive coil 22a may have an identical number of n / 2 right and n / 2 left hand partial turns 32a, 32b. As a result, they are induced by the stator coil 20
  • the number n of total partial windings 32a, 32b defines the periodicity of the rotational angle sensor 10, that is to say the uniqueness range of the signals or the measuring range. It is also advantageous if the number of sickle-shaped partial turns 34a, 34b on the rotor element 14 is equal to the number n of the annular sector-shaped partial turns 32a, 32b on the
  • Stator element 12 is.
  • FIG. 8 now shows a rotor element 14 for the stator element 12 from FIG. 7, which has four identically shaped crescent-shaped partial turns 34a, 34b.
  • the partial turns 34a, 34b have in the circumferential direction about the axis of rotation A alternating orientation. Just like the partial turns 32a, 32b one
  • Partial turns 34a, 34b are again defined by two circles with diameters D3 and D4 whose center points are offset from one another by the distance x.
  • Each of the partial convolutions 34a, 34b is formed by two arcuate
  • Conductor portions 40a, 40b are limited, which extend substantially on these two circles.
  • the best signal can be obtained when the circle diameters D3 and D4 have a root 2 ratio.
  • the distance x can be selected so that the two angles ⁇ , which are formed at the intersections of the circles, are substantially equal.
  • An angle ⁇ is thereby defined by a circle starting from the intersection and a straight line through the intersection, the
  • CU / SY at an angle of 45 ° to the distance x.
  • x / D3 expediently in the range from 1/6 to 1/2, for example 1/4.
  • FIG. 10 shows a rotor element 14 analogous to FIG. 5, in which the
  • Rotor receiving coil 28 is disposed within the rotor end spool 30.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un capteur d'angle de rotation (10) comprenant un élément stator (12) pourvu d'une bobine d'émission (20) et d'au moins une bobine de réception (22) ; un élément rotor (14) qui est monté rotatif autour d'un axe de rotation (A), par rapport à l'élément stator (12), et comportant une bobine de réception de rotor (28) ainsi qu'une bobine d'émission de rotor (30) connectées électriquement l'une à l'autre ; la bobine de réception de rotor (28) est couplée par induction à la bobine d'émission de stator (20), de sorte qu'un champ électromagnétique généré par la bobine d'émission de stator (20) induit un courant dans la bobine de réception de rotor (28), qui traverse la bobine d'émission de rotor (30) de sorte que cette dernière (30) génère un autre champ électromagnétique ; ladite au moins une bobine de réception de stator (22) est couplée par induction à la bobine d'émission de rotor (30) de sorte que le couplage inductif dépend d'un angle de rotation entre l'élément stator (12) et l'élément rotor (14) et de sorte que le champ électromagnétique généré par la bobine d'émission de rotor (30) induit au moins une tension alternative, dépendant de l'angle, dans ladite au moins une bobine de réception de stator (22). Cette dernière (22) présente au moins deux parties de spire (32a, 32b) en forme de secteur d'anneau de cercle qui divisent l'élément stator (12) en secteurs et la bobine d'émission de rotor (30) présente le même nombre de parties de spire (34a, 34b) falciformes, qui entourent successivement l'axe de rotation (A).
EP16826067.7A 2016-02-24 2016-12-27 Capteur d'angle de rotation Withdrawn EP3420315A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016202867.7A DE102016202867B3 (de) 2016-02-24 2016-02-24 Drehwinkelsensor
PCT/EP2016/082707 WO2017144144A1 (fr) 2016-02-24 2016-12-27 Capteur d'angle de rotation

Publications (1)

Publication Number Publication Date
EP3420315A1 true EP3420315A1 (fr) 2019-01-02

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EP16826067.7A Withdrawn EP3420315A1 (fr) 2016-02-24 2016-12-27 Capteur d'angle de rotation

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US (1) US10907992B2 (fr)
EP (1) EP3420315A1 (fr)
JP (1) JP6605748B2 (fr)
KR (1) KR20180115705A (fr)
CN (1) CN109073416B (fr)
DE (1) DE102016202867B3 (fr)
FR (1) FR3048079B1 (fr)
WO (1) WO2017144144A1 (fr)

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Publication number Publication date
FR3048079B1 (fr) 2019-09-13
KR20180115705A (ko) 2018-10-23
DE102016202867B3 (de) 2017-04-06
FR3048079A1 (fr) 2017-08-25
JP2019506611A (ja) 2019-03-07
CN109073416A (zh) 2018-12-21
CN109073416B (zh) 2020-05-26
WO2017144144A1 (fr) 2017-08-31
US10907992B2 (en) 2021-02-02
JP6605748B2 (ja) 2019-11-13
US20190025088A1 (en) 2019-01-24

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