• 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:
    An assembly of a motor vehicle engine comprising identical targets and an angular position sensor adapted to detect the displacement of said targets during rotation of the motor, the sensor comprising at least a first angular receiver winding (5S) adapted to generate a sine signal during the detection of a target and at least a second receiver winding (5C) adapted to generate a cosine signal during the detection of a target, each receiver winding (5S, 5C) comprising at least two meshes of winding (MS +, MS-, MC +, MC-) formed on said printed circuit board (5), the winding meshes (MS +, MS-) of the first winding (5S) and the winding meshes (MC +, MC-) of the second receiving winding (5C) being identical and shifted by a distance corresponding to half a mesh (1/2 ΩM).
    公开号:FR3023611A1
    申请号:FR1456558
    申请日:2014-07-08
    公开日:2016-01-15
    发明作者:Simon-Didier Venzal；Alain Fontanet
    申请人:Continental Automotive GmbH；Continental Automotive France SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the field of position sensors, and more particularly to an angular position sensor for a motor vehicle engine and, more particularly, an electric motor. In known manner, an electric motor has a stator portion and a rotor portion movably mounted in said stator portion. The electric motor further comprises an output shaft which is integral in rotation with the rotor part. To measure the angular position of the shaft of an electric motor, it is known to use a type of position sensor known to those skilled in the art under its English designation "resolver". Referring to FIG. 1, there is shown schematically an electric motor 1 having a stator portion 11 and a rotor portion 12 connected to an output shaft 13. A position sensor 2 is fixedly mounted relative to at the stator portion 11 of the motor 1 and is adapted to detect the position of targets 3 fixed to the rotor portion 12 of the motor 1. In a known manner, the detection of the position of the targets is carried out by means of voltage measurements. output of the position sensor 2. As illustrated in FIG. 2, the position sensor 2 defines a measurement spatial window, preferably of annular sector shape, which is traversed periodically by the targets 3 during the rotation of the part The position sensor 2 comprises, in a known manner, a housing 21 in which a circuit board 22 is mounted. In practice, each target 3 is also in the form of a sector 15. nulaire. With reference to FIGS. 3 and 4, there is shown schematically a printed circuit board 22 of position sensor 2. For the sake of clarity, the printed circuit board 22 is not annularly represented but in a linear manner, that is, "flat". With reference to FIG. 3, the printed circuit board 22 includes a primary winding 24 and two secondary windings 25, 26 coupled to the primary winding 24, the windings 24, 25, 26 being connected to an electronic module 23 for managing said In known manner, such a primary winding makes it possible to generate a magnetic field during current flow in said primary winding. The magnetic field thus created is perceived by the secondary windings, and induces a current in said secondary windings. Targets 3, made of a conductive material to permit the circulation of eddy currents, move relative to the windings 24, 25, 26 during the rotation of the motor 1. In known manner, the angular aperture of the secondary windings 25 , 26 defines the angular aperture of the measuring window F of the position sensor 2. When a target 3 is located opposite the measuring window F, as illustrated in FIG. 4, the target 3 modifies the magnetic coupling between the primary winding 24 and the two secondary windings 25, 26. In known manner, the primary winding 24 is designated transmitter winding while the secondary windings 25, 26 are designated windings receivers. Also, by measuring the electrical voltages at the terminals of the receiving windings 25, 26, it is possible to deduce the exact position of the target 3 in said measuring window F. As a result, the angular position of the shaft can be deduced therefrom. In a more detailed manner, in the presence of a target 3 in the measurement window F, the receiving windings 25, 26 placed in the vicinity of said target 3 see a smaller amount of magnetic field flux than if target 3 was absent. If, for example, a receiver coil 25, 26 consists of two loops of opposite orientation and the target 3 moves over one then the other of these loops, this receiver coil 25, 26 , relative to a zero average value, a relative increase then a relative decrease in the amount of flux of the magnetic field passing through it. In practice, the receiver windings 25, 26 are of different types. With reference to FIG. 3, there is a sinus receiver winding 25 adapted to deliver a sine signal during a passage of a target 3 in the measurement window F and a so-called receiving winding. "Cosine" 26 adapted to deliver a cosine signal during the passage of a target 3 in the measurement window F. The sine / cosine signals are correlated temporally (by the calculation of the arctangent) in order to precisely determine the position of the target 3. FIG. 5 illustrates the sine signals SIN and cosine COS respectively provided by the sine and cosine windings 26 during the detection of a target 3 in the measurement window F. By target forming sine signals SIN COS cosine means both a single target that interacts with receiver windings and two target portions (or two consecutive targets) angularly shifted that interact simultaneously with windings. receivers. In a known manner, the output signals "sine" and "cosine" are supplied by the position sensor 2 to a vehicle computer in order to allow, for example, servocontrol of the electric motor 1. Referring to FIG. a close-up view of the measurement window F, in order to obtain the sine signals SIN and cosine COS desired, the sinus receiver winding 25 comprises a whole mesh MS-oriented negatively and a whole mesh MS + oriented positively while the receiver winding cosine 26 has a first positive half-mesh 1/2 MC +, a negative integer mesh MC- and a second positive half-mesh 1/2 MC +.
    [0002] When no target 3 is present in the measurement window F, the voltages at the terminals of the receiving windings 25, 26 must be zero (V = 0). Also, it is necessary that the meshes MS +, MS- of the sinus winding 25 are symmetrical so that the generated positive field compensates for the generated negative field. Since the meshes MS-, MS + of a sinus winding 25 are integer, such symmetry is simple to realize. On the other hand, the symmetry of the cosine winding 26 is complex to obtain since the two half-links positive 1/2 MC + must compensate the negative integer mesh MC-. In practice, because of the tolerances of definition and manufacture of the meshes, the compensation of the fields is not optimal and it is necessary to resort to compensation means which are complex and expensive to implement, which presents a first disadvantage. With reference to FIG. 5, when a target 3 is in the measurement window F at the first negative pattern MS- of the sinus winding 25, the voltage across the sine winding 25 decreases progressively from the zero value (V = 0) (point A in FIG. 5) since the voltage across the receiving windings 25, 26 is zero when no target 3 is present in the measurement window F. In other words, the measured voltage is zero before the arrival of the target 3 and remains zero at the arrival of the target 3, then decreases with the passage of the target 3. In other words, the voltage is continuous when a target 3 is present in the measurement window F for a sinus receiver winding 25.
    [0003] On the contrary, with reference to FIG. 5, when a target 3 is in the measuring window at the level of the first positive half-mesh 1/2 MC + of the cosine winding 26, the voltage across the winding cosine 26 is negative (V = -Vmax at point B in FIG. 5). In other words, the measured voltage is zero before the arrival of the target 3 and switches to a negative voltage at the arrival of the target 3, then increases with the passage of the target 3. Such a discontinuity induces measurement defects and thus an inaccuracy on the angular position of the output shaft 13, which has a second disadvantage. It is therefore an object of the invention to overcome at least some of these disadvantages by providing an improved position sensor of high accuracy and simple design. For this purpose, the invention relates to an assembly of a motor vehicle engine comprising a stator part and a rotor part on which identical targets are mounted, said targets being distributed angularly over said rotor part, each target having a angular opening, two consecutive targets being separated by an angular spacing, the assembly further comprising an angular position sensor adapted to detect the displacement of said targets during rotation of the motor, the sensor comprising: - a printed circuit board; at least one first angular receiver winding adapted to generate a sine signal during the detection of a target; at least one second receiver winding adapted to generate a cosine signal during the detection of a target, each receiver winding comprising at least two winding meshes formed on said printed circuit board, each mesh comprising a mesh opening, 0M mesh opening being defined according to the following formula: 2 x 0M = A + 13 With: A: angular aperture of a target; 13: angular spacing between two consecutive targets; and at least one angular emitter winding adapted to induce an electric voltage in said receiver windings.
    [0004] The invention is remarkable in that the winding meshes of the first receiving winding and the winding meshes of the second receiving winding are all identical and integer and that the winding meshes of the second receiving winding are offset by a corresponding distance. at half a stitch with respect to the winding meshes of the first receiving winding.
    [0005] Thanks to the invention, it has sinus and cosine receivers windings of identical shapes and whose mesh is entire, which facilitates the definition and manufacture of the position sensor. In addition, it is no longer necessary to provide compensation means so that the meshes of a winding are balanced with each other. In addition, the impedance of the sinus and cosine receiver windings is identical, which avoids the use of impedance adapters as was the case in the prior art. The cost and manufacturing time of a position sensor is reduced. In addition, the offset between the windings makes it possible to form sine and cosine signals from a receiver winding form initially defined only for a sine signal (ie by a winding having no half-windings). mesh and generating a signal that starts with a null value). An offset of a quarter period, that is to say a half-mesh, makes it possible to form a cosine winding by taking advantage of the mathematical relationship (below) which links a sine to a cosine to form a cosine signal In other words, the offset makes it possible to form sine and cosine signals similar to the prior art but devoid of defects at the limits of the measurement window.
    [0006] More preferably, the emitter winding surrounds said receiver windings to allow optimal magnetic coupling therewith. Preferably, the angular aperture of a target is equal to the opening of a mesh. Preferably, the angular spacing between two consecutive targets is equal to the angular aperture of a mesh. Thus, sinus and cosine signals are obtained which are correlated together in a manner similar to the prior art. Also, the signals obtained can be provided directly to a vehicle computer according to the prior art, without any additional adaptation. More preferably, the angular spacing between two consecutive targets is equal to the angular aperture of a target. In a preferred aspect, the angular aperture of a target is 45 °. The invention also relates to a motor vehicle comprising at least one assembly as presented above. The invention will be better understood on reading the description which will follow, given solely by way of example, and with reference to the appended drawings, in which: FIG. 1 is a schematic representation of an electric motor with a sensor of position; according to the prior art, FIG. 2 is a structural representation of a position sensor with its printed circuit board; according to the prior art, Fig. 3 is a schematic representation of the windings and components of the printed circuit board of Fig. 2 in the absence of a target; according to the prior art, Figure 4 is a schematic representation of the windings and components of the printed circuit board of Figure 2 in the presence of a moving target; according to the prior art, FIG. 5 shows the cosine and sine signals provided by the position sensor upon detection of a moving target; according to the prior art, FIG. 6 is a diagrammatic representation of an emitter winding, a sine winding, a cosine winding according to the prior art, FIG. 7 is a schematic representation of a transmitting winding, of a sinus winding, of a cosine winding according to the invention, FIG. 8 is a schematic representation of a rotor part of an electric motor equipped with targets according to the invention, and FIG. 9 is a representation schematic of the target passage in front of the windings of the position sensor according to the invention. It should be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate. The invention will be presented for a motor vehicle electric motor as shown in the preamble with a position sensor mounted on a portion of the motor stator. Also, all the elements of the electric motor and the position sensor will not be repeated in detail and reference will be made to the figures of the preamble for the sake of brevity. In known manner, with reference to FIG. 1, the electric motor 1 comprises a stator portion 11 and a rotor portion 12 mounted movably in said stator portion 11. The electric motor 1 further comprises an output shaft 13 which is integral with rotation of the rotor portion 12. A position sensor 2 is fixedly mounted with respect to the stator portion 11 of the motor 1 and is adapted to detect the position of targets 3 attached to the rotor portion 12 of the 1. In a known manner, the position sensor 2 defines a measuring spatial window, preferably of annular sector shape, which is traversed periodically by the targets 3 during the rotation of the rotor portion 12. The sensor of FIG. Position 2 comprises, in a known manner, a housing in which a circuit board 5 is mounted. In this exemplary embodiment, with reference to FIG. 8, the targets 3 are 4 in number, but it goes without saying that they to be more or less numerous. The targets 3 are in the form of annular sectors of conducting material, such as aluminum or copper. The targets 3 are fixed on the stator portion 12 of the electric motor 1. Still with reference to FIG. 8, the targets 3 are distributed around the periphery of the rotor portion 12 of the engine 1 so that two targets 3 consecutive are spaced a spacing angle [3 which is, in this example, 45 °. In addition, each target 3 has an angular aperture At which is, in this example, 45 °. Preferably, the targets 3 are identical to the prior art. The invention is particularly advantageous because it can be implemented for existing vehicles simply by replacing the printed circuit board 5 of the position sensor 2 as will be detailed later. The printed circuit board 5 will now be described in detail with reference to FIG. 7. In a known manner, the printed circuit board 5 comprises a plurality of first 5S receiver windings adapted to generate a sine signal when the signal is detected. a target 3 and a plurality of second receiver windings 50 adapted to generate a cosine signal upon detection of a target 3. The first 5S receiver windings are similar to each other. Similarly, the second receiver windings 50 are similar to each other. Also, for the sake of clarity, only a single first receiving winding 5S and a single second receiving winding 50 will subsequently be shown. According to the invention (see FIG. 7), each receiving winding 50, 5S comprises at least two winding meshes MS +, MS-, MC +, MC- formed on said printed circuit board 5.
    [0007] As illustrated in FIG. 7, each receiving winding 50, 5S has only complete winding meshes MS +, MS-, MC +, MC-, unlike the prior art or the receiving winding 5C which generates a cosine signal comprised at least two half-stitches 1/2 MC + (see Figure 6). In known manner, the winding meshes can be oriented positively or negatively depending on the flow direction of the current flowing in said meshes. Still with reference to FIG. 7, the first receiver winding 5S, called the sinus winding, comprises a first MS-negatively oriented mesh and a second positively oriented mesh MS +. Similarly, the second receiving winding 5C, called the cosine winding, has a first positively oriented mesh MC + and a second mesh MC- negatively oriented. A winding with two meshes makes it possible to form an entire period of sine or cosine. In known manner, the printed circuit board 5 further comprises an emitter winding 51 adapted to induce an electrical voltage in said receiving windings 5S, 5C. Such a transmitter winding 51 is known from the prior art and will not be detailed in more detail. In addition, the printed circuit board 5 comprises an electronic module (not shown) capable of managing the operation of the windings 51, 5S, 5C. Each receiver winding 5S, 5C has an even number of meshes MS +, MC +, MS-, MC- and as many meshes oriented positively as negatively so that in the absence of disturbance, i.e. in the absence of target 3, the magnetic resultant is zero. According to the invention, with reference to FIG. 7, the winding meshes MS +, MS- of the first winding receiver 5S and the winding meshes MC +, MC- of the second winding receiver 5C are identical and all integers (no half-mesh), which facilitates the definition and manufacture of said 5S, 50 receiver windings. This is particularly advantageous for a cosine winding which is thus greatly simplified. It is therefore not necessary to provide compensation means for correcting an imbalance between the meshes. In addition, since the 5S and 5C cosine windings are of identical shapes, the definition and overall manufacture of the printed circuit board 5 is simplified. This advantage is all the more beneficial since each printed circuit board 5 comprises a plurality of first 5S receiver windings and a plurality of second receiver windings 50. In addition, the winding meshes MS +, MS- of the first winding receiver 5S and the winding meshes MC +, MC- of the second receiving winding 50 are shifted by a distance corresponding to a half-mesh 1/2 0M as illustrated in FIG. 7. By distance, it is meant an angular aperture in this example of placing implemented. Such an offset makes it possible to shift the detection of the targets between the receiving winding 5S and the receiving winding 50 by a quarter period, that is to say half a mesh. In other words, we take advantage of the mathematical relationship (below) that links a sine with a cosine to form a cosine signal from a receiver winding form initially defined for a sine signal. Because of this offset, the transmitter winding 51 is elongated compared to the prior art so as to be able to couple optimally with the two receivers 5S, 50 windings. As a result, the measurement window FA, corresponding to the angular aperture of the receiver windings 5S, 50, is elongated by a half-mesh size of 1 μm. The offset of half a mesh 1/2 0M allows a simple and practical way to form cosine and sinus signals similar to those of the prior art while overcoming the disadvantages of discontinuity as will be presented later . In order to obtain usable cosine and sinus signals, the angular aperture À of a target and the angular spacing [3 between two consecutive targets are determined as a function of the angular aperture of a 0M mesh (and vice versa) according to the equation: 2 x 0M = A + 13 With: At: angular aperture of a target 13: angular spacing between two consecutive targets 0M: angular aperture of a mesh Preferably, the angular aperture of a mesh 0M is equal to the angular aperture λ of a target 3, itself equal to the angular spacing 13 between two targets 3. This makes it possible to form sine and cosine signals calibrated in a manner similar to the prior art in order to to be able to be transmitted without further treatment to a motor vehicle calculator. In other words, for an angular aperture At of a target of 45 °, the angular spacing [3 is 45 °, and the angular aperture of a mesh 0M is 45 °. It goes without saying that the angular spacing between two targets is a modulo spacing two opening angles of a 0M mesh (6 = 0M modulo (20M)) given the periodicity of the windings. Preferably, the angular aperture F of a receiver winding 5S, 50 is equal to 3600 divided by the number of targets 3. In this example, for four targets 3, the angular aperture of a receiver winding 5S, 50 comprising two meshes is 90 ° and thus the opening angle of a mesh 0M of a receiving winding 5S, C, having two meshes, is 45 °. In this example, the sine windings 5S and cosine 50 are at the same radial distance from the axis of the motor X, but it goes without saying that they could be shifted. An exemplary implementation of the invention will be presented with reference to FIGS. 7 to 9.
    [0008] When the motor 1 is active, the rotor portion 12 rotates with its output shaft 13 with respect to its stator portion 11 as illustrated in FIG. 1. The targets 3 being integral in rotation with the rotor portion 12, the position sensor 2, secured to the stator portion 11 and positioned facing the rotor portion 12, scrolls the targets 3 in front of its measuring window FA. Given the angular spacing [3 between two targets 3, a new target 3 appears in front of the measuring window FA at each rotation of 45 ° of the rotor portion 12. Referring to FIG. 3 consecutive spaced 45 ° whose left target 3 is present in the measurement window FA at the first half of the first mesh MS- the first sinus winding 5S and whose target 3 right is present in the window of measure FA at the second mesh MC- of the second sinus winding 50 and the second half of the second mesh MS + of the first sinus winding 5S. Thus, during the rotation of the rotor portion 12, the targets 3 make it possible to act simultaneously on the meshes of the sinus windings 5S and cosine 50 in order to form sine and cosine signals similar to the prior art, that is, that is, correlated temporally. Indeed, in this configuration, the sine value is zero since two halves of meshes MS-, MS + interact with the targets 3. On the contrary, in this configuration, the cosine value is minimal since only the second mesh MC- of the second sinus winding 50 interacts with the targets 3. The sine and cosine signals are thus well correlated. Advantageously, since the meshes are entire (no half-meshes), it avoids any discontinuity defects lords the successive passage of targets 3. The extreme value of the cosine winding 50 is obtained by recovery by a target 3 of the half of a full mesh MC. It is no longer necessary to form half-stitches as in the prior art. Thus, the signals supplied can be sent directly to a motor vehicle computer without further processing. In other words, the position sensor 2 according to the invention can be installed in place of a position sensor according to the prior art without impacting the environment of the position sensor (motor 1, targets 3, computer, etc.). ).
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. A motor vehicle engine assembly comprising a stator portion (11) and a rotor portion (12) on which identical targets (3) are mounted, said targets (3) being angularly distributed over said rotor portion (12). ), each target (3) having an angular aperture (A), two consecutive targets (3) being separated by an angular spacing ([3), the assembly further comprising an angular position sensor (2) adapted to detect moving said targets (3) during rotation of the motor (1), said sensor comprising: - a printed circuit board (5); at least one first angular receiver winding (5S) adapted to generate a sine signal during the detection of a target (3); at least one second receiving winding (50) adapted to generate a cosine signal upon detection of a target (3), each receiving winding (5S, 50) comprising at least two winding cells (MS +, MS-, MC +, MC-) formed on said printed circuit board (5), each mesh having a mesh opening (0M), the mesh opening (0M) being defined according to the following formula: 2 x0M = A + 13 with A angular aperture of a target (3); 13: angular spacing (13) between two consecutive targets (3); and - at least one angular emitter winding (51) adapted to induce an electrical voltage in said receiving windings (5S, 50); the assembly being characterized in that: - the winding meshes (MS +, MS-) of the first receiving winding (5S) and the winding meshes (MC +, MC-) of the second receiving winding (50) are identical and all integers and, - the winding meshes (MC +, MC-) of the second receiving winding (50) are shifted by a distance corresponding to half a mesh (1/2 mm) with respect to the winding meshes (MS + , MS-) of the first receiving winding (5S).
    [0002]
    An angular position assembly (2) according to claim 1, characterized in that the emitter winding (51) surrounds said receiver windings (5S, 50).
    [0003]
    3. An assembly according to any one of claims 1 to 2, characterized in that the angular aperture (A) of a target (3) is equal to the mesh aperture (0M).
    [0004]
    4. An assembly according to any one of claims 1 to 3, characterized in that the angular spacing (6) between two consecutive targets (3) is equal to that of the angular aperture (λ) of a target (3). ).
    [0005]
    5. An assembly according to any one of claims 1 to 4, characterized in that the angular aperture (A) of a target (3) is equal to 45 °.
    [0006]
    6. Motor vehicle comprising an assembly according to any one of claims 1 to 5.
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    同族专利:
    公开号 | 公开日
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1164358A1|2000-06-16|2001-12-19|AMO Automatisierung Messtechnik Optik GmbH|Inductive length measuring system|
    US20130057263A1|2011-09-02|2013-03-07|Persimmon Technologies Corporation|System and method for position sensing|
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    FR3070759A1|2017-09-07|2019-03-08|Continental Automotive France|METHOD FOR DEFINING A MEASURING RANGE OF AN INDUCTIVE POSITION SENSOR|
    WO2019158871A1|2018-02-15|2019-08-22|Continental Automotive France|Torque sensor incorporating an angular position sensor of a rotating element|
    FR3085749A1|2018-09-12|2020-03-13|Electricfil Automotive|OFFSET OFFSET INDUCTIVE POSITION SENSOR|
    WO2021229169A1|2020-05-14|2021-11-18|Electricfil Automotive|Method and device for measuring the mechanical angular position of a rotor|
    法律状态:
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    2016-01-15| PLSC| Publication of the preliminary search report|Effective date: 20160115 |
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    2021-04-16| TP| Transmission of property|Owner name: VITESCO TECHNOLOGIES, DE Effective date: 20210309 |
    2021-07-27| PLFP| Fee payment|Year of fee payment: 8 |
    2022-02-11| CA| Change of address|Effective date: 20220103 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1456558A|FR3023611B1|2014-07-08|2014-07-08|ASSEMBLY COMPRISING A MOTOR VEHICLE ENGINE COMPRISING TARGETS AND AN ANGULAR POSITION SENSOR|FR1456558A| FR3023611B1|2014-07-08|2014-07-08|ASSEMBLY COMPRISING A MOTOR VEHICLE ENGINE COMPRISING TARGETS AND AN ANGULAR POSITION SENSOR|
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