• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A sensor (10) comprising: a stator with a transmitting coil and a receiver coil; a rotor (14) having a receiver coil (28) and a transmitting coil (30) connected thereto, the receiver coil (28) being inductively coupled to the stator-generating coil to induce a current flowing in its transmitting coil ( 30) for inducing a current in the stator receiving coil according to the angle of rotation. The stator receiving coil has two ring-ring sector portions which divide the stator and the rotor-emitting coil (30) has sickle-shaped coil portions (34a, 34b).
    公开号:FR3048079A1
    申请号:FR1751281
    申请日:2017-02-17
    公开日:2017-08-25
    发明作者:Andreas Merz；Fabian Utermoehlen
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    Field of the invention
    The present invention relates to a rotation angle sensor for determining, for example, the angle of rotation between a shaft and another component.
    In other words, the invention relates to a rotation angle sensor comprising a stator element with a stator-generating coil and at least one stator-receiving coil; a rotor element rotatably mounted relative to the stator element about an axis of rotation and having a rotor receiving coil and an electrically connected rotor-generating coil, the rotor receiving coil being inductively coupled to the stator-emitting coil so that the electromagnetic field generated by the stator-emitting coil induces a current in the rotor-receiving coil passing through the rotor-emitting coil so that this coil generates another electromagnetic field; the stator receiving coil being inductively coupled to the rotor-emitting coil so that the inductive coupling depends on the angle of rotation between the stator element and the rotor element and the electromagnetic field generated by the transmitting coil in at least one stator-receiving coil induces at least one angle-dependent AC voltage. State of the art
    In order to measure a rotation angle, rotation angle sensors with a rotating magnet above a magnetic field sensor are used, for example, in a known manner. The measurement of the magnetic field vector makes it possible to determine the angle of rotation. However, such sensors also react to external magnetic fields generated, for example, by a current flowing in a nearby electrical cable and thus they can be very sensitive to disturbances.
    Another type of angle of rotation sensor uses the effect of eddy currents. For this, a metal target is moved on the sensor coils fed with an alternating voltage to induce eddy currents in the target, which reduces the inductance of the sensor coils and makes it possible to determine the angle of rotation using the frequency variation. The coils are, for example, part of an oscillating circuit whose resonance frequency shifts when the inductance varies. This type of angle of rotation sensor, however, has a high transverse sensitivity vis-à-vis mounting tolerances (primarily vis-à-vis the tilting of the target). The frequency generated can also be disturbed by external electromagnetic fields (injection lock) because usually they use frequencies of the order of a few tens of MHz.
    EP 0 909 955 B1 discloses a rotation angle sensor with a target provided with short-circuited conductive loops cooperating with the alternating electromagnetic field of an excitation coil.
    Purpose of the invention
    The present invention aims to develop a rotational angle sensor that is robust, economical, space-saving. DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the subject of the invention is a rotation angle sensor of the type defined above, characterized in that the stator-receiving coil has at least two coil portions in the form of a circle ring sector which divide the stator element into sectors in the circumferential direction and the rotor emitter coil comprises sickle-shaped coil portions whose number corresponds to the number of sector-shaped coil parts of circle ring and which surround the axis of rotation successively one after the other in the peripheral direction.
    In other words, the object of the invention is a rotation angle sensor installed in particular in an environment loaded with strong parasitic electromagnetic fields. For example, the angle of rotation sensor is installed in the enclosure of an engine or near a vehicle engine, for example to determine the position of the throttle flap, the position of the rotor of an engine BLDC, the position of the accelerator pedal or that of a camshaft. The angle sensor according to the invention is economical, compact and uses a simple measuring principle.
    In other words, as already indicated, the stator-emitting coil receives an AC voltage which, by inductively coupling the stator-transmitting coil to the rotor-receiving coil, induces another AC voltage in the rotor-receiving coil. The AC voltage generated in the rotor receiver coil forms a current in this coil passing inductively coupling the rotor-generating coil in one or more stator-receiving coils in which it generates a new AC voltage that can be measured. From the measured values, the relative rotational angle between the stator element and the rotor element is determined.
    At least one stator receiving coil has at least two (for example also an even number) of ring-shaped sector sector-shaped coil portions which divide the stator element into sectors and the rotor-transmitting coil has a an equal number (i.e., the same number as the circle ring sector coil portions) of sickle-shaped coil portions which follow each other in the circumferential direction about the rotation. The circle ring sector winding portion may be a sector of a circle (e.g. a semicircle or a quarter circle). It may also have the shape of a ring sector, that is to say a segment of ring delimited by the two circular lines of the ring and by two radial lines.
    Thus, each winding portion of the stator receiving coil is associated with a winding portion of the rotor-emitting coil so that each winding portion of the rotor-transmitting coil induces an alternating field in the part of the corresponding winding of the stator receiver coil. For different angles of rotation there is thus a different overlap of the sickle-shaped coil portions with the ring-shaped sector sector-shaped coil parts, which generates different induced AC voltages.
    Further, the amplitude of the AC voltage depends on the overlapping surface of the sickle-shaped coil portions and the ring-shaped segment-shaped coil portions. This overlapping surface can be adjusted by the shape of the sickle coil parts. As in the case of a sickle shape, the overlapping surface does not increase linearly with the angle of rotation, the functional relationship between the amplitude of the alternating voltage and the angle of rotation can be adjusted. the shape of the sickles. In particular, a sinusoidal relationship can be set between the amplitude of the AC voltage and the angle of rotation.
    A circle ring sector winding portion has two circular arc shaped conductor segments of different radius, radially directed and connected to the ends of the arcuate conductor segments. However, it is also possible for a winding portion to be in the form of a circular ring sector, that is to say only comprise a circular arc-shaped conducting segment connected to two radially oriented conducting segments. , practically up to the axis of rotation. In addition, a winding portion in the form of a circle ring segment may also be hemispherical in shape. The inner radius of the circle ring sector which defines the coil portion may be, preferably 5% and at most 15% of the outer radius of the circle ring sector. The angle of rotation sensor uses a simple measuring principle and can also be realized economically because it has no expensive magnet installed on the rotor element. The arrangement and shape of the coils take up little space. In addition, the angle of rotation sensor is robust to construction tolerances, which saves money.
    According to a development of the invention, the sickle-shaped coil portions are delimited by circular arcuate conductor segments. In this way, a sinusoidal function relation is obtained between the amplitude of the AC voltage induced in one of the stator receiver coils and the angle of rotation. A sinusoidal signal dependent on the angle of rotation is easily operated and converts to a rotation angle. For example, in the case of two stator receiving coils (in a two-phase system) from the quotient of the two signals the rotation angle is determined by the arctan function. In the case of three stator receiver coils (three-phase system) the rotation angle is obtained by a Clarke transformation which determines the three signals and then applies an arctan calculation.
    In general, the coil portions of the stator-receiving coil and coil portions of the rotor-transmitting coil can be symmetrically mounted around the rotational axis. There may also be winding portions of the stator receiving coil and / or winding portions of the rotor transmitting coil which are substantially of the same nature or the same. Thus, the AC voltages induced in each pair of winding parts are equal.
    According to a development of the invention, the rotor emitter coil consists of two winding parts of the same dimension, sickle-shaped. The diameter of the arcuate or circle shaped conductive segments of one winding portion may differ by less than 10% from that of the other. For example, the circles defined by the conductive segments may have the same diameter. This advantageously results in strong signal symmetry and the inverse calculation is simple. The center of the circles defined by the conductive segments can be shifted relative to each other by about 5% of the average diameter of the two circles.
    According to a development of the invention, the rotor-emitting coil consists of four winding parts of the same dimension, sickle-shaped, for example with surfaces of the same size and the ratio of the diameters of the conductor segments in the form of arc of circle or circle of a winding part differs by less than 10% according to the root of 2 (for example 1.41). As a result, the inner segments of the conductive path join the outer conductive segments of the neighboring sickle. This advantageously results in a very sinusoidal shape of the signals. It is avoided that the signals are deformed, for example, in the direction of a triangle function. The center of the circles defined by the conductive segments can be shifted, for example from 1/6 to 1/2, for example to about 1/4 of the larger radius.
    According to a development of the invention, the winding portions of the stator receiving coil, which are in the shape of a circle ring sector, and the sickle-shaped winding portions of the rotor-transmitting coil each have a opposite orientation relative to the current successively in the peripheral direction. In other words, the sickle-shaped winding portions of the rotor-emitting coil which are adjacent in the peripheral direction have substantially antiparallel-like electromagnetic fields when these electromagnetic fields are applied to the winding portions of the receiver coil. a stator in the shape of a circle ring sector, the generated alternating voltages add up because of the series assembly. Conversely, the voltages induced in the winding portions in the form of a circle ring sector and corresponding to a homogeneous parasite field compensate each other. This greatly reduces the influence of parasitic magnetic fields (eg those generated by strong currents passing in nearby cables), the sickle-shaped winding parts are only in an annular zone of the element of rotor that surrounds the axis of rotation. In this way, there is, on the rotor element, a surface surrounding the axis of rotation and which can be used for other functions of the rotor element. The annular zone can be defined by two concentric circles of different radius around the axis of rotation.
    The rotor receiving spool may, for example, be in the inner region of the rotor element which surrounds the axis of rotation and the sickle-shaped winding portions may surround this inner region. There is thus a great robustness vis-à-vis the tolerances (in particular vis-à-vis the radial offsets of the rotor element relative to the stator element) thus resulting in a very compact and economical sensor.
    According to a development of the invention, the rotor receiving coil and / or the stator-transmitting coil surrounds the axis of rotation of the rotation angle sensor in a circular form, the axis being the center which defines the circles of the rotors. coils. This advantageously results in a particularly homogeneous magnetic field (stator-emitting coil) or as much as possible of the generated field can be received by the rotor receiving coil.
    According to a development of the invention, the rotor-emitting coil and at least one stator-receiving coil each have an even number of winding portions. In this way, the two coils will have the same number of winding portions oriented in one direction and in the other direction so that the external parasitic fields will completely compensate. The signal received by the stator receiving coil can thus be a function of the rotation angle and thus substantially a sine function or a cosine function oscillating around the null line. This simplifies the operation because it does not require any complicated operating electronics to calculate, inversely, the angle from the value of the signal. The operation can be done using a discrete component circuit or with a very simple processor. The expression "rotor-emitting coil" represents at least one "rotor-emitting coil". This applies, in a similar way, to the stator receiver coil, the stator transmitter coil and the rotor receiver coil.
    According to a development of the invention, the stator element comprises two stator receiving coils offset by 90 ° relative to each other in the peripheral direction or the stator element comprises three offset stator receiver coils. relative to each other 120 ° in the peripheral direction. The multiplicity of the stator receiving coils each providing its own signal makes it possible to increase the accuracy of the angle of rotation sensor. By exploiting the difference signals, the voltages induced by the external parasitic fields are not integrated in the measurement because these parasitic fields act in the same way on all the signals. In the case of two stator receiver coils, a difference signal can be used. In the case of three stator receiver coils, three difference signals can be used.
    According to a development of the invention, the stator emitter coils and at least one stator receiver coil are planar coils installed in and / or on a stator circuit board. It is also possible to have rotor receiver coils and rotor emitter coils which are planar coils installed in and / or on a rotor circuit board. The elements of the angle of rotation sensor can be made from simple components to manufacture. For example, the coils can be made in a single layer in the circuit board or in two layers of a circuit board, the conductive paths being interconnected by through contacts connecting the two layers. This makes it possible to use a circuit board design which is particularly simple and economical to produce.
    drawings
    The present invention will be described hereinafter in more detail with the aid of examples of rotation angle sensors shown in the accompanying drawings in which: FIG. 1 is a schematic view of an angle sensor According to one embodiment of the invention, FIG. 2 schematically shows a stator element of a rotation angle sensor according to one embodiment of the invention, FIG. 3 schematically shows a rotor element. 4 shows a diagram giving geometrical relations of the rotor element of FIG. 3, FIG. An angle of rotation sensor according to another embodiment of the invention, FIG. 6 schematically shows a stator element of a rotation angle sensor according to this other embodiment. 7 of the invention schematically shows a stator element of a rotation angle sensor corresponding to another embodiment of the invention, FIG. 8 schematically shows a rotor element of a sensor of FIG. rotation angle according to another embodiment of the invention, FIG. 9 shows a diagram giving the geometrical relations of the rotor element of FIG. 8; FIG. 10 schematically shows a rotor element of another rotation angle sensor according to another embodiment of the invention.
    Description of embodiments
    FIG. 1 shows a rotation angle sensor 10 of a stator element 12 and a rotor element 14. The rotor element 14 is installed on a shaft 16 of a component such as the shutter the throttle, motor, camshaft, accelerator pedal or the like or is integrated with this shaft 16. The shaft 16 rotates about the axis A and the stator element 16 is opposite the rotor element 14 in the corresponding axial direction. The stator element 12 is, for example, attached to the halves of the component. The stator member 12 includes a stator circuit board 18 provided with a stator-generating coil 20 and a stator receiver coil assembly 22. The stator circuit board 18 may be a stator circuit board 18 to a layer, with two or more layers and the conductors of the coils 20, 22 can be on both sides of the stator circuit board 18 and between the different layers of this plate 18. The stator circuit board 18 can carry other components of a control unit 24. The control unit 24 supplies the stator coils 20 with an alternating voltage (for example a frequency between 1 MHz and 20 MHz, for example 5 MHz and / or a voltage of amplitude between 0.5V-10V, (for example equal to 1.5V) In each stator-receiving coil 22, the induced AC voltage is determined As a function of these measurements, the control unit 24 gives the rotation angle re The rotor element 14 comprises a rotor circuit plate 26. This rotor circuit plate 26 carries a rotor receiver coil 28 and a transmission coil of the rotor element 26. rotor 30. 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 on both sides of the rotor circuit board 26 or between the different layers of this rotor circuit plate 26.
    The characteristic external dimensions (such as the diameter) of the stator-generating coil 20, stator-generating coils 22a, 22b, stator-receiving coils 22a, 22b, the rotor-receiving coil 28 and the rotor-transmitting coil 30 are between 4 mm and 50 mm (they are preferably equal to 12 mm).
    Fig. 2 shows a rotation angle sensor stator member 12 of Fig. 1 in plan view which consists of the stator-generating coil 20 and two stator-receiving coils 22a, 22b.
    The stator transmitter coil 20 is substantially circular in shape and the axis A is the center of the stator transmitter coil 20; it completely surrounds the stator receiver coils 22a, 22b. The first and second stator receiving coils 22a, 22b are offset from each other by 90 ° in the peripheral direction and each has two coil portions 32a, 32b oriented in opposite directions (these portions references only for the coil 22a). Each of the coil portions 32a, 32b is in the form of a circle ring sector and is in particular substantially semicircular in shape. The winding portion 32a is oriented in the opposite direction to the winding portion 32b (orientation with respect to current flow). The two portions 32a, 32b of a stator receiving coil overlap in combination substantially over the entire area traversed by the stator transmitter coil 20. This allows for a particularly powerful reception signal.
    Figure 3 shows a rotor element 14 of the rotation angle sensor 10 of Figure 1, seen from above; this element comprises the rotor receiving coil 28 and the rotor emitting coil 30.
    The rotor receiving spool 28 has substantially a circular or arcuate force and the axis A corresponds to the center of the stator-emitting coil 20 and completely surrounds the rotor-emitting coil 30. The rotor-receiving coil 28 and the rotor-emitting coil 30 are electrically connected at their ends, i.e. they are short-circuited or connected in series. The rotor receiving coil 28 can traverse the same surface as and / or be aligned with the stator-generating coil 20 relative to the axis of rotation A. The geometry of the stator-emitting coil 20 and the coil rotor receiver 28 may be identical. It is also possible that the stator transmitter coil 20 and the rotor receiver coil 28 differ in diameter and / or the number of separate conductors forming each coil. Thus, for example, the stator transmitter coil 20 may have two, four or more conductive loops in the same direction to generate a strong alternating field.
    The rotor emitter coil 30 has two winding portions 34a, 34b in opposite directions and each having a sickle shape. The first winding portion 34a is oriented in the opposite direction of the second winding portion 34b (orientation for current flow). The geometry of the winding portions 34a, 34b may be the same. The winding portions 34a, 34b are in an annular zone 36 surrounding the axis of rotation A and lying outside the inner zone 38 not covered by the rotor-emitting coil 30.
    The two sickle-shaped winding portions 34a, 34b are formed by substantially circular arcuate conductor segments 40a, 40b, which intersect at the transition point between the sickle-shaped windings 34a, 34b . The ends of the intersections for the winding portions 34a, 34b may be in different positions of the rotor circuit board 26.
    When the control unit 24 applies an alternating voltage to the stator-generating coil 20, this generates an alternating electromagnetic field received by the rotor receiving coil 28 which, by inducing a voltage, generates a current. The distance, for example, between the stator circuit board 18 and the rotor circuit board 26 will be chosen so that the stator circuit board 28 is in the near vicinity of the rotor circuit board 26.
    The electromagnetic field generated by the stator-emitting coil 20 generates substantially no current in the stator-receiving coils 22a, 22b and the rotor-emitting coil 30 because the winding portions 32a, 32b or 34a, 34b rotate in opposite directions . The current induced in the rotor receiving coil 28 also passes through the rotor emitter coil 30 which thus generates with its two winding portions 34a, 34b, two alternating electromagnetic fields oriented in opposite directions.
    These alternating fields induce in the stator receiving coils 22a, 22b, an alternating current which depends, for each of the stator receiving coils 22a, 22b of the relative rotational angle of the stator element 12 with respect to the element rotor 14.
    The alternating current induced in the stator receiving coils 22a, 22b depends substantially, in a linear fashion, on the relative overlap of the ring-shaped section winding portions 32a, 32b of the stator receiving coils 22a, 22b and sickle-like winding parts 34a, 34b of the rotor-emitting coil 30. Due to the choice of the geometry of the winding parts, the relative overlapping surface does not depend on the rotation angle according to a linear function and the amplitude of the induced AC voltage is adjusted according to the angle of rotation by the choice of the geometry of the sickle-shaped winding portions 34a, 34b. For example, as will be detailed next, the amplitude of the AC voltage induced depends on the sine of the angle of rotation. This facilitates the exploitation of the signal generated by the stator receiving coils 22a, 22b.
    Figure 4 shows a diagram describing the geometry of the rotor-emitting coil 30 and its winding portions 34a, 34b. The arcuate shaped segments 40a, 40b are defined by two circles of diameter DI and D2 (i.e., these conductor segments substantially follow these circles) whose centers are offset by the distance x . The two diameters D1, D2 may be substantially identical. The shift x is chosen with respect to the average diameter D = (D1 + D2) / 2 in the range 0.05 <x / D <0.5 with, preferably x / D = 0.15. The diameters are substantially between 4 mm and 20 mm and are preferably equal to 12 mm.
    FIG. 5 shows another rotor element 14 used in combination with the stator element 12 of FIG. 2. The rotor element 14 comprises a rotor receiving coil 30 in the rotor emitter coil 28. The coil The rotor receiver 30 is in the inner zone 38 of the annular zone 36.
    Thanks to the sickle-shaped winding portions 34a, 34b of the rotor-emitting coil 28, the inner zone 38 can be used to integrate the rotor-receiving coil 30. This solution has the advantage that, on the one hand, the rotor element 14 will be smaller and more economical and on the other hand, the amplitude of the AC voltage induced in the rotor receiver coil 28 will not depend on the lateral offset between the rotor element 14 and the element stator 12.
    FIG. 6 shows another embodiment of a stator element 12 used in combination with the rotor element 14 of FIGS. 3 and 5. The stator element 12 comprises a first stator-receiving coil 22a, a second coil a stator receiver 22b and a third stator receiver coil 22c; these receiver coils are shifted substantially 120 ° relative to each other and they can be installed each as the stator receiving coils 22a, 22b of Figure 2.
    The three stator receiving coils 22a, 22b, 22c induce in the stator element 12, three different AC voltages (such as signal 1, signal 2, signal 3) which thus give a three-phase signal that is exploited. In particular, not only the directly induced alternating voltages can be exploited, but also their differences. By exploiting the differences (signal 1 - signal 2), (signal 2 - signal 3) and (signal 3 - signal 1) the possible offset can be compensated for and arrive at a larger sinusoidal shape. The inverse rotation angle calculation can be done simply and robustly by applying the Clarke transform.
    The angle of rotation sensors 10, shown in the stator elements 12 and the rotor elements 14 of FIGS. 2 to 6, have a periodicity, that is to say a measurement range of 360 °. As many applications such as the detection of a rotation angle (pivot angle) of a throttle flap require a periodicity of less than 360 °, a periodicity of 180 ° will be described below with the help of the figures 7 to 10.
    Figure 7 shows a stator element 12 with a stator receiving coil 22a composed of four identical winding portions 34a, 34b, in the shape of a circle ring sector (here quadrant shapes). The winding portions 32a, 32b have an alternating orientation in the peripheral direction about the axis of rotation A. The stator element 12 may comprise other stator receiving coils constructed as the stator receiving coil 22a and which are offset relative to each other by a given angle, as will be described next. By way of example, in the case of stator receiver coils 22a, these coils 22a can be shifted by an angle of 45 °.
    In general, a stator receiving coil 22a will have an identical number of turn portions 32a, 32b which rotate left (n / 2) and right (n / 2). As a result, the partial alternating voltages induced in the stator transmitter coil 20 compensate in sum and give a 0 V output signal on all the receiver coils 22a. This fact can also be applied to the proper diagnosis because the angle of rotation sensor 10 can thus know that the rotor element 12 is missing, or that there is an electrical power failure.
    The total number n of winding portions 32a, 32b sets the periodicity of the angle of rotation sensor 10, the range in which the signals are unambiguous, that is to say the measuring range. It may also be advantageous if the number of sickle-shaped winding portions 34a, 34b on the rotor element 14 is equal to the number n of winding portions 32a, 32b in the shape of a circle ring sector on the stator element 12.
    For the periodicity Per one applies the following formula:
    From this periodicity Per and from the number (m) of stator receiving coils 22a, 22b, 22c (see FIGS. 2 and 6), the necessary geometrical rotation ξ of the stator receiving coils 22a, 22b, 22c relative to one another is obtained with respect to to others according to the following formula:
    For FIGS. 2 to 6, because of n = 2, the winding portions 32a, 32b have a periodicity of 360 ° and thus for a two-phase system (m = 2) there is a geometric rotation between the receiving coils equal to at 90 ° (Figure 2). In the case of a three-phase system 120 ° is obtained (Figure 6).
    For FIG. 7, for n = 4, the winding portions 32a, 32b have a periodicity of 180 ° and thus for a two-phase system (n = 2) there is a geometric rotation between the receiving coils, equal to 45 ° C. °. In a three-phase system with m = 3, 60 ° is obtained.
    Figure 8 shows a rotor element 14 for the stator element 12 of Figure 7 which has four identical sickle-shaped winding portions 34a, 34b. In the peripheral direction about the axis of rotation A the winding portions 34a, 34b have an orientation varying in the circumferential direction about the axis of rotation A. Precisely, the portions 32a, 32b of a receiving winding stator 22a as the portions 32a, 32b of a stator receiving coil 22a on the corresponding stator segment 12 according to FIG. 7 are sickle-shaped portions 34a, 34b offset in the circumferential direction by a geometric angle of 90 °.
    According to FIG. 9, it is possible to define the geometry of the sickle-shaped coil portions 34a, 34b with two circles of diameter D3 and D4 and whose centers are offset by the distance i. Each winding portion 34a, 34b has two ring-shaped conductor segments 40a, 40b which substantially follow the two circles.
    It has been found that in the stator receiving coil 22a, the best signal is obtained when the diameters D3, D4 are in a ratio equal to the root of 2. The distance x is chosen so that the two angles β formed at the point of the intersection of the circles are practically equal and the angle β is defined by the intersection of the circular line starting from the circular line and a straight line passing through the point of intersection at an angle of 45 ° to the path x. For this, we choose x / D3 advantageously in a range between 1/6 and 1/2; this ratio is for example equal to 1/4.
    FIG. 10 shows a rotor element 14 similar to that of FIG. 5 and in which the rotor receiving coil 28 is inside the rotor-emitting coil 30.
    MAIN COMPONENT NOMENCLATURE 10 Angle of rotation sensor 12 Stator element 14 Rotor element 16 Shaft 18 Stator circuit plate 20 Stator coil 22 Stator coil 22a, 22b Stator coil 24 Control unit 26 Circuit rotor 28 Rotor receiving coil 30 Rotor emitting coil 32a, 32b Coil portions 34a, 34b Coil portions 40a, 40b Conducting segments
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1 °) Angle of rotation sensor (10) comprising: a stator element (12) with a stator-generating coil (20) and at least one stator-receiving coil (22); a rotor element (14) rotatably mounted with respect to the stator element (12) about an axis of rotation (A) and having a rotor receiver coil (28) and a rotor-emitting coil ( 30) electrically connected, the rotor receiving coil (28) being inductively coupled to the stator-generating coil (20) such that the electromagnetic field generated by the stator-generating coil (20) induces a current in the receiver coil rotor (28), which current flows through the rotor-emitting coil (30) so that the coil (30) generates another electromagnetic field; the stator receiving coil (22) being inductively coupled to the rotor transmitting coil (30) such that the inductive coupling is dependent on the angle of rotation between the stator element (12) and the rotor element (14) and that the electromagnetic field generated by the rotor-transmitting coil (30) induces in at least one stator-receiving coil (22) at least one angle-dependent AC voltage, characterized in that the receiver coil of stator (22) has at least two ring-ring sector-shaped coil portions (32a, 32b) which divide the stator element (12) into sectors in the circumferential direction and the rotor-emitting coil (30) has sickle-shaped coil portions (34a, 34b) the number of which corresponds to the number of ring-shaped sector-shaped coils portions which surround the axis of rotation (A) successively one after another others in the direction of the periphery erica.
    [0002]
    Angle of rotation sensor (10) according to claim 1, characterized in that the sickle-shaped coil portions (34a, 34b) are delimited by wire-shaped conductor segments (40a, 40b). arc.
    [0003]
    Angle of rotation sensor (10) according to claim 2, characterized in that the rotor-emitting coil (30) consists of two coil portions (34a, 34b) of similarly shaped sickle and / or the diameters (D1, D2) of arcuate-shaped conductor segments (40a, 40b) of a sickle-shaped winding portion (34a, 34b) differ by less than 10%.
    [0004]
    Angle of rotation sensor (10) according to claim 2, characterized in that the rotor-emitting coil (30) consists of four circular-shaped coil portions (34a, 34b) of the same size and shape. or the ratio of diameters (D3, D4) of arcuate conductor segments (40a, 40b) of a winding portion (34a, 34b) differ by less than 10% from the root of 2 .
    [0005]
    Angle of rotation sensor (10) according to one of claims 1 to 4, characterized in that the ring-shaped sector sector-shaped coil portions (32a, 32b) of a receiver coil of stator (22) and the sickle-shaped coil portions (34a, 34b) of the rotor-emitting coil (30) have, successively in the peripheral direction, an orientation opposite to that of the current flowing therethrough.
    [0006]
    Angle of rotation sensor (10) according to one of claims 1 to 5, characterized in that the sickle-shaped coil portions (34a, 34b) are located only in an annular zone (36) of the rotor element (14) surrounding the axis of rotation (A) and / or the rotor receiving coil (28) is located in an inner region (38) of the surrounding rotor element (14). the axis of rotation (A) and the sickle-shaped coil portions (34a, 34b) surround the inner region (38).
    [0007]
    Angle of rotation sensor (10) according to one of claims 1 to 6, characterized in that the rotor receiving coil (28) and / or the stator-generating coil (20) surround the axis of rotation. rotation (A) of the angle of rotation sensor (10) in a circle shape.
    [0008]
    Angle of rotation sensor (10) according to one of claims 1 to 7, characterized in that the rotor-generating coil (30) and at least one stator-receiving coil (22) have an even number of coil portions (32a, 32b, 34a, 34b).
    [0009]
    Angle of rotation sensor (10) according to one of claims 1 to 8, characterized in that the stator element (12) comprises two stator receiving coils (22a, 22b) displaced one by to the other 90 ° in the circumferential direction or the stator element (12) has three stator receiving coils (22a, 22b, 22c) shifted relative to each other by 120 ° in the direction peripheral.
    [0010]
    Angle of rotation sensor (10) according to one of Claims 1 to 9, characterized in that the stator-generating coil (20) and at least one stator-receiving coil (22) are constituted by coils. planes which are in and / or on a stator circuit board (18) and / or the rotor receiver coil (28) and the rotor emitter coil (30) are plane coils which are in and / or on a rotor circuit board (26).
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    同族专利:
    公开号 | 公开日
    FR3048079B1|2019-09-13|
    KR20180115705A|2018-10-23|
    US20190025088A1|2019-01-24|
    JP6605748B2|2019-11-13|
    CN109073416A|2018-12-21|
    EP3420315A1|2019-01-02|
    US10907992B2|2021-02-02|
    DE102016202867B3|2017-04-06|
    JP2019506611A|2019-03-07|
    WO2017144144A1|2017-08-31|
    CN109073416B|2020-05-26|
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    法律状态:
    2018-02-23| PLFP| Fee payment|Year of fee payment: 2 |
    2019-02-15| PLSC| Publication of the preliminary search report|Effective date: 20190215 |
    2019-02-19| PLFP| Fee payment|Year of fee payment: 3 |
    2020-02-20| PLFP| Fee payment|Year of fee payment: 4 |
    2021-02-17| PLFP| Fee payment|Year of fee payment: 5 |
    2022-02-21| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102016202867.7|2016-02-24|
    DE102016202867.7A|DE102016202867B3|2016-02-24|2016-02-24|Rotation angle sensor|
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