Position sensor stator, position sensor, position sensor system, and vehicle

Abstract

The application discloses a position sensor stator, a position sensor, a position sensor system and a vehicle. The position sensor stator comprises a circuit board, at least two receiving coil groups, a first excitation coil and a second excitation coil arranged on the circuit board, wherein the at least two receiving coil groups, the first excitation coil and the second excitation coil have a same geometric center point, and the first excitation coil and the second excitation coil have a spacing in a radial direction. The position sensor stator can reduce the influence between the first excitation coil and the second excitation coil, and has higher structural stability.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a position sensor stator, a position sensor, a position sensor system, and a vehicle. Background Technology

[0002] Nowadays, inductive position sensors, also known as "eddy current sensors," are a new type of non-contact sensor used to sense the rotational position of a target rotor. Due to their high precision, high resolution, and high robustness against environmental influences, they have gradually gained market recognition and are widely used in industries such as manufacturing, robotics, and automobiles.

[0003] In related technologies, non-redundant single-coil circuit structures can no longer fully meet the increasingly high requirements for sensing accuracy, response speed and safety redundancy in critical applications, and urgently need to be improved. Therefore, dual-coil circuit structures have been developed. Although dual-coil circuit structures have stronger reliability and safety, the two transmitting coils are close to each other and will interfere with each other, affecting the actual performance of the transmitting coils. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a position sensor stator that reduces the influence between the first excitation coil and the second excitation coil, and has higher structural stability.

[0005] It has higher reliability and safety, and is more suitable for angular displacement measurement in critical safety systems.

[0006] A second aspect of the present invention provides a position sensor.

[0007] A third aspect of the present invention provides a position sensor system.

[0008] A fourth aspect of the present invention provides an electric motor.

[0009] A fifth aspect of the present invention provides an electric powertrain.

[0010] A sixth aspect of the present invention provides a vehicle.

[0011] To address the aforementioned problems, a first aspect of the present invention provides a position sensor stator, comprising: a circuit board; at least two receiving coil groups, a first excitation coil, and a second excitation coil disposed on the circuit board; wherein the at least two receiving coil groups, the first excitation coil, and the second excitation coil have the same geometric center point, and the first excitation coil and the second excitation coil have a distance between them in the radial direction.

[0012] According to an embodiment of the present invention, the position sensor stator has a first excitation coil and a second excitation coil on the circuit board, and adopts a redundant dual-coil circuit structure. At least two receiving coil groups, the first excitation coil and the second excitation coil have the same geometric center point, and the first excitation coil and the second excitation coil have a distance in the radial direction, which can reduce the coupling between the first excitation coil and the second excitation coil, reduce the influence of the two on each other's actual operation, and enhance the stability of the redundant dual-coil circuit structure.

[0013] In some embodiments, both the first excitation coil and the second excitation coil are symmetrical polygonal closed coils formed around the geometric center point, and the radial distance of the first excitation coil is greater than the radial distance of the second excitation coil.

[0014] In some embodiments, the at least two receiving coil groups are located radially inside the first excitation coil.

[0015] In some embodiments, a first portion of the receiving coil group in at least two receiving coil groups is disposed between the first excitation coil and the second excitation coil, and a second portion of the receiving coil group in at least two receiving coil groups is disposed radially inside the second excitation coil.

[0016] In some embodiments, the at least two receiving coil groups are located between the first excitation coil and the second excitation coil.

[0017] In some embodiments, each receiving coil includes at least two sub-receiving coils, each of which has a closed spoke-shaped structure symmetrical about the geometric center point, and the at least two sub-receiving coils are arranged to cross each other circumferentially.

[0018] In some embodiments, both the first excitation coil and the second excitation coil are fan-shaped rings, and the first excitation coil and the second excitation coil are arranged symmetrically.

[0019] In some embodiments, the first excitation coil is disposed around a first portion of the at least two receiving coil groups, and the second excitation coil is disposed around a second portion of the at least two receiving coil groups, wherein the first portion of the receiving coil group and the second portion of the receiving coil group are symmetrically disposed about the geometric center point.

[0020] In some embodiments, each receiving coil group includes at least two sub-receiving coils, each of which has a fan-shaped structure and is arranged to cross each other circumferentially.

[0021] In some embodiments, each sub-receiving coil in each receiving coil group is a closed coil formed by a curve that is based on a trigonometric function and extends in a spiral shape along the circumference.

[0022] In some embodiments, each sub-receiving coil in each receiving coil group includes a first receiving section and a second receiving section, wherein the polarity of the first receiving section is opposite to that of the second receiving section.

[0023] In some embodiments, the circuit board includes multiple conductive layers, and each sub-receiving coil in each receiving coil group is disposed on at least two conductive layers in the circuit board.

[0024] In some embodiments, each sub-receiving coil in each receiving coil group has an inflection point, and the sub-receiving coils are arranged in layers at the inflection point.

[0025] In some embodiments, in the radial direction, wires in the sub-receiving coil located in different conductive layers are led out at the inflection point to the side away from the geometric center point for electrical connection.

[0026] In some embodiments, the shape parameters of the first portion of the receiving coil group are the same as or different from those of the second portion of the receiving coil group, and the shape parameters include at least the helical radius, helical direction, helical slope, helical period, and number of helical turns.

[0027] In some embodiments, the first portion of the receiving coil group includes a first sub-receiving coil and a second sub-receiving coil with the same shape parameters, and the second portion of the receiving coil group includes a third sub-receiving coil and a fourth sub-receiving coil with the same shape parameters.

[0028] In some embodiments, the circuit board includes multiple conductive layers, the first excitation coil is a single-turn coil or a multi-turn coil, and the first excitation coil is disposed on at least one conductive layer in the circuit board; the second excitation coil is a single-turn coil or a multi-turn coil, and the second excitation coil is disposed on at least one conductive layer in the circuit board.

[0029] In some embodiments, the first excitation coil is electrically connected to the second excitation coil.

[0030] A second aspect of the present invention provides a position sensor, comprising: a position sensor rotor; and a position sensor stator as described in the above embodiment, wherein the position sensor stator is used to drive the position sensor rotor to rotate.

[0031] The position sensor according to embodiments of the present invention can reduce the influence between the first excitation coil and the second excitation coil, has higher structural stability, and the sensor has higher sensing accuracy.

[0032] In some embodiments, the position sensor rotor and the position sensor stator have the same geometric center point.

[0033] In some embodiments, the position sensor rotor includes a substrate on which a plurality of first conductive regions are disposed in a ring-shaped arrangement and symmetrically arranged in the radial direction.

[0034] In some embodiments, the first conductive region is a blade-shaped structure extending in the radial direction.

[0035] In some embodiments, a first annular conductive region is further provided on the substrate, and the side of the plurality of first conductive regions near the geometric center point is connected to the first annular conductive region.

[0036] In some embodiments, a first portion of the receiving coil group in at least two receiving coil groups of the position sensor stator is disposed radially inside the first excitation coil, and a second portion of the receiving coil group in at least two receiving coil groups is disposed radially inside the second excitation coil; a second annular conductive region is also disposed on the substrate, the radial distance of the first annular conductive region is less than the radial distance of the second annular conductive region, and the second annular conductive region is circumferentially connected to the middle of the plurality of first conductive regions.

[0037] In some embodiments, the non-conductive areas on the substrate are cut out.

[0038] In some embodiments, the substrate is further provided with a first cutout area, the first cutout area having a circular structure and located in the middle of the substrate, and the plurality of first conductive areas being arranged to surround the first cutout area in a ring-like manner.

[0039] In some embodiments, a first portion of the receiving coil group in at least two receiving coil groups of the position sensor stator is disposed radially inside the first excitation coil, and a second portion of the receiving coil group in at least two receiving coil groups is disposed radially inside the second excitation coil; the position sensor rotor includes a substrate, on which a second hollow area, a second conductive area, and a third conductive area are disposed, the second hollow area having a circular structure and located in the middle of the substrate, the plurality of second conductive areas being arranged to surround the second hollow area in a ring shape, the plurality of third conductive areas corresponding one-to-one with the plurality of second conductive areas and being arranged to surround the second conductive area in a ring shape along the outer edge of the second conductive area, the plurality of second conductive areas and the plurality of third conductive areas being symmetrically arranged in the radial direction.

[0040] In some embodiments, the substrate includes a first surface or a second surface disposed opposite to each other, the plurality of second conductive regions are all disposed on the first surface or the second surface, and the plurality of third conductive regions are all disposed on the first surface or the second surface.

[0041] A third aspect of the present invention provides a position sensor system, comprising: a position sensor as described in the above embodiments; and a signal processing unit connected to the position sensor, configured to inject a carrier signal into the position sensor and generate an angle signal based on a voltage signal fed back by the position sensor.

[0042] The position sensor system according to embodiments of the present invention can reduce the influence between the first excitation coil and the second excitation coil, has higher structural stability, and the sensor has higher sensing accuracy.

[0043] In some embodiments, both the first excitation coil and the second excitation coil are fan-shaped rings, and the first excitation coil and the second excitation coil are symmetrically arranged; the signal processing unit is located in the spacing region between the first excitation coil and the second excitation coil.

[0044] A fourth aspect of the present invention provides a motor including the position sensor described in the above embodiments.

[0045] The motor according to embodiments of the present invention can reduce the influence between the first excitation coil and the second excitation coil, has higher structural stability, and the sensor has higher sensing accuracy.

[0046] A fifth aspect of the present invention provides an electric powertrain including the motor described in the above embodiments.

[0047] The electric powertrain according to embodiments of the present invention can reduce the influence between the first excitation coil and the second excitation coil, has higher structural stability, and the sensor has higher sensing accuracy.

[0048] A sixth aspect of the present invention provides an electronic pedal, which includes the position sensor of the above embodiments, or the position sensor system of the above embodiments, or the motor of the above embodiments, or the electric assembly of the above embodiments.

[0049] The electronic pedal according to embodiments of the present invention can reduce the influence between the first excitation coil and the second excitation coil, has higher structural stability, and the sensor has higher sensing accuracy.

[0050] A sixth aspect of the present invention provides a vehicle that includes the position sensor of the above embodiments, or the position sensor system of the above embodiments, or the motor of the above embodiments, or the electric powertrain of the above embodiments.

[0051] The vehicle according to embodiments of the present invention can reduce the influence between the first excitation coil and the second excitation coil, has higher structural stability, and the sensor has higher sensing accuracy.

[0052] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0053] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural block diagram of a position sensor stator according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a position sensor stator according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a position sensor stator according to another embodiment of the present invention; Figure 4 This is a schematic diagram of a position sensor stator according to another embodiment of the present invention; Figure 5 This is a structural block diagram of a position sensor according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a position sensor rotor according to an embodiment of the present invention; Figure 7 This is a schematic diagram of a position sensor rotor according to another embodiment of the present invention; Figure 8 This is a schematic diagram of a position sensor rotor according to another embodiment of the present invention; Figure 9 This is a schematic diagram of a position sensor rotor according to another embodiment of the present invention; Figure 10 This is a structural block diagram of a sensor system according to an embodiment of the present invention; Figure 11 This is a structural block diagram of a sensor system according to another embodiment of the present invention; Figure 12 This is a structural block diagram of a sensor system according to another embodiment of the present invention; Figure 13 This is a structural block diagram of a motor according to an embodiment of the present invention; Figure 14 This is a structural block diagram of an electric powertrain according to an embodiment of the present invention.

[0054] Figure label: Electric powertrain 4000; Motor 3000; Position sensor system 2000; Position sensor 1000; Position sensor stator 100; Position sensor rotor 200; Signal processing unit 300; Receiver coil group 10; first excitation coil 11, first sub-receiver coil 12, second sub-receiver coil 13, second excitation coil 14, third sub-receiver coil 15, fourth sub-receiver coil 16, first signal processing unit 3, second signal processing unit 4; first partial receiver coil group 101; second partial receiver coil group 102; substrate 40; first conductive region 41; first annular conductive region 42; third annular conductive region 43; second conductive region 44; third conductive region 45; first cutout region 54; second cutout region 55; excitation coil 17; inflection point 18. Detailed Implementation

[0055] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0056] Nowadays, inductive position sensors, also known as "eddy current sensors," are a new type of non-contact sensor used to sense the rotational position of a target rotor. Due to their high precision, high resolution, and high robustness against environmental influences, they have gradually gained market recognition and are widely used in industries such as manufacturing, robotics, and automobiles.

[0057] Typically, each inductive position sensor with a non-redundant single-coil circuit structure is equipped with at least one excitation coil positioned opposite the target rotor in the axial direction, at least two receiving coils that detect the position of the target rotor based on changes in the inductance of the excitation coil, a matching signal processing unit, and at least one sensor channel pair that outputs an angle signal. The inductance of the receiving coils changes according to the eddy currents flowing in the alternating magnetic field generated by the excitation coil on the target rotor. One receiving coil generates a sine signal, and the other generates a cosine signal; the absolute position of the target rotor is determined by using both signals.

[0058] Despite their significant advantages in certain characteristics, inductive position sensors with a single non-redundant single-coil circuit structure can no longer fully meet the increasingly higher requirements for sensing accuracy, response speed, and safety redundancy in critical applications due to the continuous development of intelligent, connected, and electrified trends in various fields, especially in the automotive sector. Therefore, improvements are urgently needed. To address this, a dual-coil circuit structure has been developed. Although the dual-coil circuit structure offers greater reliability and safety, the two transmitting coils are located close to each other, which can cause mutual interference and affect the actual performance of the transmitting coils.

[0059] To address the aforementioned problems, a first aspect of the present invention provides a position sensor stator that reduces the influence between the first excitation coil and the second excitation coil, thereby achieving higher structural stability.

[0060] The following is for reference. Figure 1 A position sensor stator 100 according to an embodiment of the present invention is described. The position sensor stator 100 includes a circuit board; at least two receiving coil groups 10, a first excitation coil 11 and a second excitation coil 14 disposed on the circuit board.

[0061] Among them, at least two receiving coil groups 10, the first excitation coil 11 and the second excitation coil 14 have the same geometric center point, and the first excitation coil 11 and the second excitation coil 14 have a distance between them in the radial direction.

[0062] Specifically, circuit structures with only one excitation coil lack redundancy in the corresponding sensor's sensing system. With prolonged use, the single excitation coil may fail, leading to performance degradation. Since the single-coil circuit structure lacks redundancy, its safety and reliability are insufficient. The position sensor stator of this application simultaneously features a first excitation coil 11 and a second excitation coil 14 on the circuit board, employing a dual-coil circuit structure. Compared to the single-coil circuit structure, the addition of an excitation coil as a redundant system enhances reliability and safety, making it more suitable for angular displacement measurement in critical safety systems. Because the two excitation coils in the prior art are relatively close together, the two... The magnetic fields generated by the excitation coils will affect each other, causing the actual output of the excitation coils to fail to achieve the expected effect, ultimately affecting the accuracy of the position sensor in detecting the position. At the same time, due to the large coupling effect between them, the signal of the excitation coils will be interfered with. Therefore, at least two receiving coil groups 10, the first excitation coil 11 and the second excitation coil 14 have the same geometric center point and are spaced apart in the radial direction. The distance of the spacing should ensure that the coupling between the first excitation coil 11 and the second excitation coil 14 is reduced, thereby reducing the impact of the two on each other's actual working performance and enhancing the stability of the circuit structure of the position sensor stator 100.

[0063] According to an embodiment of the present invention, the position sensor stator 100 has a first excitation coil 11 and a second excitation coil 14 disposed on a circuit board. At least two receiving coil groups 10, the first excitation coil 11 and the second excitation coil 14 have the same geometric center point, and the first excitation coil 11 and the second excitation coil 14 have a distance in the radial direction, which can reduce the coupling between the first excitation coil 11 and the second excitation coil 14, reduce the influence of the two on each other's actual operation, and enhance the stability of the redundant dual-coil circuit structure.

[0064] In some embodiments, the first excitation coil 11 and the second excitation coil 14 are both symmetrical polygonal closed coils formed around a geometric center point, and the radial distance of the first excitation coil is greater than the radial distance of the second excitation coil.

[0065] Specifically, if the shape of the excitation coil is more complex, it will increase the difficulty of drawing the position sensor coil mechanism, which is not conducive to the rapid customization design of the position sensor stator for different applications. Therefore, the first excitation coil 11 and the second excitation coil 14 are both symmetrical polygonal closed coils formed around the geometric center point, and the first excitation coil 11 is set as the outer ring and the second excitation coil 14 is set as the inner ring. Since the shape of the symmetrical polygonal coil is relatively simple, the difficulty of drawing the coil circuit structure can be reduced. In other words, the position sensor stator can be rapidly customized for different applications.

[0066] In some embodiments, at least two receiving coil groups 10 are located radially inside the first excitation coil 11.

[0067] Specifically, the magnetic field generated by the excitation coil typically has a more uniform and stronger magnetic field strength distribution in its radially inner region. Therefore, arranging at least two receiving coil groups 10 on the radially inner side of the first excitation coil 11 can more effectively capture changes in the magnetic field, thereby improving the sensitivity and accuracy of the sensor.

[0068] In some embodiments, a first portion of the receiving coil group in at least two receiving coil groups is disposed between the first excitation coil and the second excitation coil, and a second portion of the receiving coil group in at least two receiving coil groups is disposed radially inside the second excitation coil.

[0069] Specifically, the two receiving coil groups 10 are located in the non-overlapping inner and outer ring regions under the same geometric center, respectively, and there is sufficient spacing between them to reduce the coupling between different receiving coil groups, reduce the impact of each other on the actual operation, and enhance the stability of the circuit structure.

[0070] For example, such as Figure 2 As shown, the first excitation coil 11, the first partial receiving coil group 101, the second partial receiving coil 102, and the second excitation coil 14 are designed as traces on a printed circuit board, and the coil centers are set in the same axial direction. However, the first partial receiving coil group 101 and the second partial receiving coil 102 are located in printed circuit board areas with different inner and outer diameters. The inner and outer diameters of the printed circuit board area where the first partial receiving coil group 101 is located are both larger than the inner and outer diameters of the printed circuit board area where the second partial receiving coil 102 is located. That is, the first excitation coil 11 is located in the outer ring area under the coaxial direction, and the second excitation coil 14 is located in the inner ring area under the coaxial direction. Here, an approximately closed circular wire can represent one turn of the coil.

[0071] In some embodiments, at least two receiving coil groups are located between the first excitation coil and the second excitation coil.

[0072] Specifically, at least two receiving coil groups 10 are located inside the first excitation coil 11 and outside the second excitation coil 14, that is, the two receiving coil groups 10 are arranged in the same annular area, and the two excitation coils are arranged close to the outer and inner peripheries of the two receiving coil groups, respectively. This can increase the ratio of the receiving area of ​​the receiving coil group to the circuit structure of the position sensor stator, reduce the space occupied by the receiving coil group, and thus reduce the sensor size. Under the same circuit structure arrangement area, the receiving efficiency of the receiving coil group is improved, or the arrangement area of ​​the circuit structure is reduced as much as possible while ensuring the receiving efficiency of the receiving coil group 10. In addition, since at least two receiving coil groups 10 are located between the first excitation coil 11 and the second excitation coil 14, and there is a sufficiently large gap between the first excitation coil 11 and the second excitation coil 14, the coupling between the two can be reduced, the influence of the two on each other's actual operation can be reduced, and the stability of the circuit structure can be enhanced.

[0073] For example, such as Figure 3 As shown, the first excitation coil 11, the first partial receiving coil group 101, the second partial receiving coil 102, and the second excitation coil 14 are designed as traces on a printed circuit board, and the coil centers are set in the same axial direction. The first partial receiving coil group 101 and the second partial receiving coil 102 have the same shape parameters and are rotationally symmetrical about their geometric centers. However, the first excitation coil 11 and the second excitation coil 14 are located in printed circuit board areas with different inner and outer diameters. The inner diameter of the printed circuit board area where the first excitation coil 11 is located is larger than the outer diameter of the receiving coil, and the outer diameter of the printed circuit board area where the second excitation coil 14 is located is smaller than the inner diameter of the receiving coil.

[0074] In some embodiments, each receiving coil includes at least two sub-receiving coils, each of which has a closed spoke-shaped structure symmetrical about a geometric center point, and the at least two sub-receiving coils are arranged to cross each other circumferentially.

[0075] Specifically, such as Figure 2 or Figure 3As shown, each receiving coil group 10 includes two sub-receiving coils, namely sub-receiving coil 12 and sub-receiving coil 13. Sub-receiving coil 12 and sub-receiving coil 13 are both closed spoke-shaped structures symmetrical at their geometric center point. The first excitation coil 11 extends around and completely surrounds the outer periphery of the first receiving coil 12 and the second receiving coil 13 from the perspective of the axial direction. Sub-receiving coil 12 and sub-receiving coil 13 are arranged to cross each other circumferentially, that is, there is a phase angle difference in the circumferential direction. The two sub-receiving coils have the same receiving radius.

[0076] In some embodiments, both the first excitation coil and the second excitation coil are fan-shaped rings, and the first excitation coil and the second excitation coil are arranged symmetrically.

[0077] Specifically, the first excitation coil 11 and the second excitation coil 14 are both fan-shaped rings and are located in symmetrical regions on the circuit board. The center points of the fan-shaped rings surrounding the two regions are set on the same axis, so that there is sufficient spacing between the first excitation coil 11 and the second excitation coil 14, which can reduce the coupling between the first excitation coil 11 and the second excitation coil 14, reduce the impact of the two on each other's actual operation, and enhance the stability of the circuit structure.

[0078] In some embodiments, a first excitation coil is arranged around a first portion of a receiving coil group in at least two receiving coil groups, and a second excitation coil is arranged around a second portion of a receiving coil group in at least two receiving coil groups, with the first and second receiving coil groups arranged symmetrically about a geometric center point.

[0079] Specifically, such as Figure 4 As shown, the first excitation coil 11, the first partial receiving coil group 101, the second partial receiving coil 102, and the second excitation coil 14 are designed as traces on a printed circuit board. The first partial receiving coil group 101 and the second partial receiving coil group 102 are located in two different fan-ring shaped regions on the printed circuit board. The two fan-ring shaped regions are symmetrically distributed from left to right, and the center points of the fan rings surrounding the two regions are set on the same axis. This can reduce the coupling between the first partial receiving coil group 101 and the second partial receiving coil group 102, thereby reducing their impact on each other's actual operation and enhancing the stability of the circuit structure.

[0080] In some embodiments, each receiving coil group includes at least two sub-receiving coils, each of which has a fan-shaped structure and is arranged to cross each other circumferentially.

[0081] Specifically, such as Figure 4As shown, each receiving coil group 10 includes two sub-receiving coils. The spiral cycles contained in the sub-receiving coils 12 and 13 cannot cover the spiral cycles of the entire detection area corresponding to the rotation of the whole circle. That is, they can only cover the spiral cycles of a portion of the fan-shaped detection area less than 180°. The sub-receiving coils 12 and 13 are arranged to cross each other in the circumferential direction, that is, there is a phase angle difference in the circumferential direction. The sub-receiving coils 12 and 13 are configured to have the same receiving radius.

[0082] In some embodiments, each sub-receiving coil in each receiving coil group is a closed coil formed by a curve that is based on a trigonometric function and extends in a spiral shape along the circumference.

[0083] For example, each sub-receiving coil in each receiving coil group 10 is a closed spoke-shaped coil structure obtained by polar coordinate transformation of one or more sine curves; or, each sub-receiving coil in each receiving coil group 10 is a fan-shaped coil structure obtained by polar coordinate transformation of one or more cosine curves. Thus, each sub-receiving coil in at least two receiving coil groups is wound with curves based on trigonometric functions, which can fit the boundary contour of the magnetic field strength under the influence of the target rotor, so that the amplitude envelope of the induced voltage in one electrical cycle is as close as possible to the sine curve, improving the sensing accuracy of the sensor. At the same time, the shape of the approximate sine curve is relatively simple, reducing the difficulty of drawing the circuit structure, and allowing for rapid customized design for different applications. At least two sub-receiving coils extend in a spiral shape in their arc direction, thereby enabling the two receiving coils to be staggered in radial space.

[0084] In some embodiments, each sub-receiving coil in each receiving coil group includes a first receiving section and a second receiving section, wherein the polarity of the first receiving section is opposite to that of the second receiving section.

[0085] Specifically, the sub-receiving coil 12 consists of two coil loops with opposite polarities wound from a single wire on a printed circuit board, namely the first receiving section and the second receiving section. The coil loop of the first receiving section approximates a closed spoke-shaped coil structure or a fan-shaped coil structure obtained by polar coordinate transformation from one or more sine curves. The coil loop of the second receiving section is similar in shape to the former coil loop, but its initial position maintains a phase angle difference of half a spiral cycle from the former, and their polarities are opposite. The sub-receiving coil 13 also consists of two coil loops with opposite polarities wound from a single wire on a printed circuit board, namely the first receiving section and the second receiving section. The coil loop of the first receiving section approximates a closed spoke-shaped coil structure or a fan-shaped coil structure obtained by polar coordinate transformation from one or more cosine curves. The coil loop of the second receiving section is similar in shape to the former coil loop, but its initial position maintains a phase angle difference of half a spiral cycle from the former, and their polarities are opposite. A minimum asymmetric curve is extracted from the coil loops of the first and second receiving sections, namely, an approximately sine curve and an approximately cosine curve within the same rotation angle region of the receiving coil, forming a measurement region with one spiral cycle.

[0086] The coil circuit may not be a perfect sine or cosine rotation curve. The coil curve can be slightly curved or finely adjusted. Rectangular sections can also be drawn out from the protruding parts of the inner and outer diameters of the coil circuit to reduce the influence of the wires connected to the signal processing unit in the coil circuit.

[0087] In some embodiments, the circuit board includes multiple conductive layers, and each sub-receiving coil in each receiving coil group is disposed on at least two conductive layers in the circuit board.

[0088] Specifically, the sub-receiving coil 12 and sub-receiving coil 13 are uniquely configured in two different conductive layers of the printed circuit board, and the structures in the same conductive layer do not overlap with each other.

[0089] In some embodiments, such as Figures 2-4 As shown, each sub-receiving coil in each receiving coil group has an inflection point 18 that changes its own extension direction, and the sub-receiving coils are arranged in layers at the inflection point 18.

[0090] Specifically, taking the first receiving coil group 101 as an example, the sub-receiving coil 12 and sub-receiving coil 13 are layered at the inflection point 18, which can simplify the layout of the line.

[0091] In some embodiments, in the radial direction, the wires in the sub-receiving coil located in different conductive layers are led out at the inflection point 18 to the side away from the geometric center point for electrical connection.

[0092] Specifically, such as Figures 2-4As shown, taking the first receiving coil group 101 as an example, the starting point and ending point of the sub-receiving coil 12 and the sub-receiving coil 13 are both inflection points 18. At their connection points, they can be electrically connected by leading out to the side away from the geometric center point directly or by flying wire through a hole.

[0093] In some embodiments, the shape parameters of the first receiving coil group are the same as or different from those of the second receiving coil group, and the shape parameters include at least the helical radius, helical direction, helical slope, helical period, and number of helical turns.

[0094] Specifically, if the first part of the receiving coil group 101 in at least two receiving coil groups 10 is located inside the first excitation coil 11 in the radial direction, and the second part of the receiving coil group 102 in at least two receiving coil groups 10 is located inside the second excitation coil 14 in the radial direction, then the at least two receiving coil groups 10, the first excitation coil 11 and the second excitation coil 14 are all located in printed circuit board areas with different inner and outer diameters, and the radial distance of the first excitation coil 11 is greater than the radial distance of the second excitation coil 14. Therefore, the first receiving coil group 101 and the first excitation coil 11 are the same in all shape parameters except that the inner and outer diameters of the coils are smaller than those of the second receiving coil group 102 and the second excitation coil 14, or the spiral radius, spiral direction, spiral angle, spiral period and spiral number are different. Alternatively, when at least two sets of receiving coils 10 are located between the first excitation coil 11 and the second excitation coil 14, it is known that the first excitation coil 11 and the second excitation coil 14 are located in printed circuit board areas with different inner and outer diameters, while the first set of receiving coils 101 and the second set of receiving coils 102 are located in the same printed circuit board area. The first set of receiving coils 101 and the second set of receiving coils 102 have the same shape parameters and are rotationally symmetric about the geometric center. Therefore, the first set of receiving coils 101 and the second set of receiving coils 102 are the same except for the shape parameters such as the coil helix angle and the starting and ending positions. However, the shape parameters such as the number of coil turns and the number of conductive layers arranged in the first set of receiving coils 101 and the second set of receiving coils 102 may be different. Alternatively, when the first excitation coil 11 is arranged around the first portion of the receiving coil group 101 in at least two receiving coil groups 10, and the second excitation coil 14 is arranged around the second portion of the receiving coil group 102 in at least two receiving coil groups 10, it is known that the first portion of the receiving coil group 101 and the second portion of the receiving coil group 102 are located in two fan-shaped printed circuit board areas that are symmetrical to each other, and the center point of the fan rings surrounding the two areas is set on the same axis. Therefore, except for position parameters such as the initial angle and the end angle, the first portion of the receiving coil group 101 and the second portion of the receiving coil group 102 can be configured with the same shape parameters. The second portion of the receiving coil group can be obtained by rotating the first portion of the receiving coil group 180° with the same axis as the center point.

[0095] In some embodiments, the first receiving coil group includes a first sub-receiving coil and a second sub-receiving coil with the same shape parameters, and the second receiving coil group includes a third sub-receiving coil and a fourth sub-receiving coil with the same shape parameters.

[0096] Specifically, the first receiving coil group 101 and the second receiving coil group 102 are located in printed circuit board areas with different inner and outer diameters. The inner and outer diameters of the printed circuit board area where the second receiving coil group 102 is located are smaller than the inner and outer diameters of the printed circuit board area where the first receiving coil group 101 is located. Therefore, the second excitation coil 14, the third sub-receiving coil 15, and the fourth sub-receiving coil 16 are the same except that their inner and outer diameters are smaller than those of the first excitation coil 11, the first sub-receiving coil 12, and the second sub-receiving coil 13. The shape parameters such as the number of coil turns and the number of conductive layers arranged in the second excitation coil 14 can be different from those of the first excitation coil 11. The shape parameters such as the spiral period and spiral slope of the third sub-receiving coil 15 and the fourth sub-receiving coil 16 can be different from those of the first receiving coil 15 and the second receiving coil 16. Alternatively, given that the first receiving coil group 101 and the second receiving coil group 102 are located within two fan-shaped printed circuit board regions that are symmetrical to each other, and the center points of the fan-shaped circles surrounding the two regions are set on the same axis, the first receiving coil group and the second receiving coil group 102 can be configured with the same shape parameters, except for position parameters such as the initial angle and the ending angle.

[0097] In some embodiments, the circuit board includes multiple conductive layers, the first excitation coil is a single-turn coil or a multi-turn coil, and the first excitation coil is disposed on at least one conductive layer in the circuit board; the second excitation coil is a single-turn coil or a multi-turn coil, and the second excitation coil is disposed on at least one conductive layer in the circuit board.

[0098] Specifically, the first excitation coil 11 can be a single-layer structure, disposed on one of the conductive layers of the printed circuit board; or, the first excitation coil 11 can also be a multi-layer structure, disposed on different conductive layers of the printed circuit board, with the coil structures of different conductive layers having approximately the same number of turns, inner and outer diameters, etc., and the adjacent layer structures of the first excitation coil 11 are connected through vias; the second excitation coil 14 can be a single-layer structure, disposed on one of the conductive layers of the printed circuit board; or, the second excitation coil 14 can also be a multi-layer structure, disposed on different conductive layers of the printed circuit board, with the coil structures of different conductive layers having approximately the same number of turns, inner and outer diameters, etc., and the adjacent layer structures of the second excitation coil 14 are connected through vias.

[0099] In some embodiments, the first excitation coil is electrically connected to the second excitation coil.

[0100] Specifically, the first excitation coil 11 and the second excitation coil 14 are electrically connected and can receive the same current signal at the same time, thereby generating a synchronized magnetic field. This ensures the consistency and symmetry of the magnetic field and improves the accuracy of position detection.

[0101] A second aspect of the present invention provides a position sensor 1000, such as... Figure 5 As shown, it includes a position sensor rotor 200 and a position sensor stator 100.

[0102] The position sensor stator 100 is used to drive the position sensor rotor 200 to rotate.

[0103] Specifically, the position sensor stator 100 generates a magnetic field through an excitation coil, uses a receiving coil to sense the magnetic field change caused by the position change of the sensor rotor 200, and transmits the magnetic field change through an electrical signal.

[0104] The position sensor 1000 according to the embodiments of the present invention can reduce the influence between the first excitation coil 11 and the second excitation coil 14, has higher structural stability, and the sensor 100 has higher sensing accuracy.

[0105] In some embodiments, the position sensor rotor and the position sensor stator have the same geometric center point.

[0106] Specifically, the position sensor rotor 200 is positioned in the axial direction at the same position as the first excitation coil 11 and the second excitation coil 14. The rotor center is the same as the axis of the first excitation coil 11 and the second excitation coil 14, and it can rotate from 0° to 360° through the axis.

[0107] In some embodiments, such as Figure 6The position sensor rotor 200 shown includes a substrate 40, on which a plurality of first conductive regions 41 are disposed in a ring and symmetrically arranged in the radial direction.

[0108] Specifically, the substrate 40 can be metal or other conductive materials. During the rotation of the position sensor rotor 200, the magnetic field generated by the position sensor stator 100 is interacted through the first conductive area 41, thereby using the receiving coil to sense the change in magnetic field of the sensor rotor 200 caused by the change in position.

[0109] In some embodiments, such as Figure 6 As shown, the first conductive region 41 is a blade-shaped structure extending in the radial direction.

[0110] Specifically, the position sensor rotor 200 is typically composed of multi-lobed, staggered, and radially symmetrical blades. The blades are in the substrate, and the area of ​​each lobe and the gap between them is the same. The blades can completely cover coils of the same polarity, so that the magnetic flux of the coils of the same polarity is inconsistent with the magnetic flux of the coils of opposite polarity.

[0111] In some embodiments, such as Figure 6 As shown, a first annular conductive region 42 is also provided on the substrate, and one side of a plurality of first conductive regions 41 near the geometric center point is connected to the first annular conductive region 42.

[0112] Specifically, such as Figure 6 As shown, the substrate 40 is made of conductive material. The position sensor rotor 200 overlaps with at least two receiving coil groups 10, the first excitation coil 11, and the second excitation coil 14, and includes multiple spaced-apart gap segments. The gap segments are made of non-conductive material. The spacing between adjacent gap segments has the same shape and spacing as the gap segments themselves, exhibiting rotational symmetry. The multiple gap segments of the substrate 40 have the same shape and spacing and, together with the outer ring spacing region, cover the entire circumference of the substrate 40, completely covering or exceeding the area where the at least two receiving coil groups 10, the first excitation coil 11, and the second excitation coil 14 are located. The spiral period of the first sub-receiving coil 12, the second sub-receiving coil 13, the third sub-receiving coil 15, and the fourth sub-receiving coil 16 is an integer multiple of the number of gap segments.

[0113] In some embodiments, such as Figure 7As shown, in the position sensor stator, the first part of the receiving coil group of at least two receiving coil groups is located inside the first excitation coil in the radial direction, and the second part of the receiving coil group of at least two receiving coil groups is located inside the second excitation coil in the radial direction; a second annular conductive region 43 is also provided on the substrate 40, the radial distance of the first annular conductive region 42 is smaller than the radial distance of the second annular conductive region 43, and the second annular conductive region 43 is connected to the middle of the plurality of first conductive regions 41 in the circumferential direction.

[0114] Specifically, such as Figure 7 As shown, the substrate 40 is made of conductive material. The position sensor rotor 200 overlaps with at least two receiving coil groups 10, the first excitation coil 11, and the second excitation coil 14, and includes N outer ring gap segments and M inner ring gap segments spaced apart from each other. The gap regions between adjacent N outer ring gap segments have the same shape and spacing as the outer ring gap segments, exhibiting rotational symmetry. The N outer ring gap segments of the substrate 40 have the same shape and spacing and, together with the outer ring gap regions, cover the entire circumference of the target rotor body, completely covering or exceeding the outer ring region where the first receiving coil group 101 and the first excitation coil 11 are located. The gap regions between adjacent M inner ring gap segments are rotationally symmetrical with the inner ring gap segments. The gap segments have the same shape and spacing. The M inner ring gap segments of the substrate 40 have the same shape and spacing and cover the entire circumference of the target rotor body 40 with the inner ring spacing area. They completely cover or exceed the inner ring area where the second part receiving coil group 102 and the second excitation coil 14 are located. The spiral period of the first part receiving coil 101 is an integer multiple of the number N of the outer ring gap segments and the outer ring spacing area. The spiral period of the second part receiving coil 102 is an integer multiple of the number M of the inner ring gap segments and the inner ring spacing area. The number N of the outer ring gap segments and the outer ring spacing area can be the same as or different from the number M of the inner ring gap segments and the inner ring spacing area.

[0115] In some embodiments, the non-conductive areas on the substrate are cut out.

[0116] Specifically, such as Figure 6 As shown, each gap between each leaf of the first conductive region 41 is a non-conductive area, and is designed with a perforated structure, such as... Figure 7 As shown, each gap between each blade in the first conductive region 41 is divided into two parts by the second conductive region 43, namely the gap section in the inner ring and the gap section in the outer ring. Both the gap section in the inner ring and the gap section in the outer ring are non-conductive areas and are hollowed out. The hollowing out design can reduce the weight of the position sensor rotor 200 by removing unnecessary non-conductive areas.

[0117] In some embodiments, such as Figure 8As shown, a first cutout area 54 is also provided on the substrate 40. The first cutout area 54 adopts a circular structure and is located in the middle of the substrate. A plurality of first conductive areas 41 are arranged to surround the first cutout area 54 in a ring shape.

[0118] Specifically, such as Figure 8 As shown, the substrate 40 is made of insulating material. The position sensor rotor 200 overlaps with at least two receiving coil groups 10, the first excitation coil 11, and the second excitation coil 14, and includes multiple copper-plated sections spaced apart from each other, namely first conductive areas 41. The first conductive areas 41 are copper-plated areas on the upper or lower surface of the substrate 40. The spacing between adjacent first conductive areas 41 has the same shape and spacing as the first conductive areas 41 and is rotationally symmetrical. The multiple first conductive areas 41 of the substrate 40 have the same shape and spacing and cover the entire circumference of the printed circuit board substrate 40 with the spacing areas, completely covering or exceeding the area where the at least two receiving coil groups 10, the first excitation coil 11, and the second excitation coil 14 are located. The spiral period of the at least two receiving coil groups 10 is an integer multiple of the number of first conductive areas 41.

[0119] In some embodiments, such as Figure 9 As shown, in the position sensor stator, the first part of the receiving coil group of at least two receiving coil groups is located inside the first excitation coil in the radial direction, and the second part of the receiving coil group of at least two receiving coil groups is located inside the second excitation coil in the radial direction. The position sensor rotor includes a substrate 40, on which a second hollow area 54, a second conductive area 44 and a third conductive area 45 are provided. The second hollow area 54 has a circular structure and is located in the middle of the substrate 40. The plurality of second conductive areas 44 are arranged to surround the edge of the second hollow area 54 in a ring shape. The plurality of third conductive areas 45 correspond one-to-one with the plurality of second conductive areas 44 and are arranged to surround the outer edge of the second conductive area 44 in a ring shape. The plurality of second conductive areas 44 and the plurality of third conductive areas 45 are symmetrically arranged in the radial direction.

[0120] Specifically, such as Figure 9As shown, the substrate 40 is made of insulating material. The position sensor rotor 200 overlaps with at least two receiving coil groups 10, the first excitation coil 11, and the second excitation coil 14, and includes N outer copper-plated sections (i.e., third conductive regions 45) and M inner copper-plated sections (i.e., second conductive regions 44) spaced apart from each other. The third conductive regions 45 and the second conductive regions 44 are copper-plated areas on the upper or lower surface of the substrate 40. The spacing between the N adjacent third conductive regions 45 has the same shape and spacing as the third conductive regions 45, exhibiting rotational symmetry. The Nth outer copper-plated sections of the printed circuit board substrate 40... The three conductive regions 45 have the same shape and spacing and, together with the outer ring spacing region, cover the entire circumference of the substrate 40, completely covering or exceeding the outer ring region where the first receiving coil group 101 and the first excitation coil 11 are located. The spacing regions between the M adjacent second conductive regions 44 have the same shape and spacing as the second conductive regions 44. The M second conductive regions 44 of the substrate 40 have the same shape and spacing and, together with the inner ring spacing region, cover the entire circumference of the substrate 40, completely covering or exceeding the inner ring region where the second receiving coil group 102 and the second excitation coil are located. The spiral period of the first receiving coil 101 is an integer multiple of the number N of the third conductive regions 45 and the outer ring spacing regions. The spiral period of the second receiving coil 102 is an integer multiple of the number M of the second conductive regions 44 and the inner ring spacing regions. The number N of the third conductive regions 45 and the outer ring spacing regions can be the same as or different from the number M of the second conductive regions 44 and the inner ring spacing regions.

[0121] In some embodiments, the substrate includes a first surface or a second surface disposed opposite to each other, a plurality of second conductive regions are disposed on the first surface or the second surface, and a plurality of third conductive regions are disposed on the first surface or the second surface.

[0122] Specifically, multiple second conductive regions and multiple third conductive regions are all disposed on the first or second surface, which can concentrate all conductive regions on the same surface and simplify the manufacturing process.

[0123] A third aspect of the present invention provides a sensor system 2000, such as... Figure 10 As shown, the sensor system 2000 includes a position sensor 1000 and a signal processing unit 300.

[0124] The signal processing unit 300 is connected to the position sensor 1000 and is used to inject a carrier signal into the position sensor 1000 and generate an angle signal based on the voltage signal fed back by the position sensor 1000.

[0125] Specifically, such as Figure 11As shown, the position sensor system 2000 includes a first excitation coil 11, a first sub-receiving coil 12, a second sub-receiving coil 13, a second excitation coil 14, a third sub-receiving coil 15, a fourth sub-receiving coil 16, a first signal processing unit 3, and a second signal processing unit 4. The first signal processing unit 3 injects a high-frequency oscillating carrier signal into the first excitation coil 11, causing the first excitation coil 11 to generate a high-frequency alternating electromagnetic field. The second signal processing unit 4 injects a high-frequency oscillating carrier signal into the second excitation coil 14, causing the second excitation coil 14 to generate a high-frequency alternating electromagnetic field. A high-frequency alternating electromagnetic field is generated by an oscillating carrier signal. The first sub-receiving coil 12 and the second sub-receiving coil 13 are each composed of an even number of coil loops with opposite polarities wound around a single wire on a printed circuit board. Under the influence of the high-frequency alternating electromagnetic field generated only by the first excitation coil 11, the induced electromotive forces generated by the coil loops cancel each other out. Similarly, the third sub-receiving coil 15 and the fourth sub-receiving coil 16 are each composed of an even number of coil loops with opposite polarities wound around a single wire. Under the influence of the high-frequency alternating electromagnetic field generated only by the second excitation coil 14, the induced electromotive forces generated by the coil loops cancel each other out. The starting and ending points of the wires of the first excitation coil 11 and the second excitation coil 14 are led out and connected to the signal processing unit 300 via direct connection or through-hole flying wires.

[0126] The position sensor rotor 200 includes a thin sheet of a specific shape made of conductive material, which is disposed within the high-frequency alternating electromagnetic field created by the first excitation coil 11 and the second excitation coil 14. The high-frequency alternating electromagnetic field generates eddy currents, affecting the electromagnetic field under the coverage area, thereby affecting the coupling between the first sub-receiving coil 12, the second sub-receiving coil 13, the third sub-receiving coil 15, and the fourth sub-receiving coil 16 and the first excitation coil 11 and the second excitation coil 14. This results in the generation of electromagnetic fields in the first sub-receiving coil 12, the second sub-receiving coil 13, the third sub-receiving coil 15, and the fourth sub-receiving coil 16 according to... The voltage signal that changes due to the change in position of the position sensor rotor 200 is received, demodulated and processed by the first signal processing unit 3, which receives, demodulates and processes the voltage signals generated by the first sub-receiving coil 12 and the second sub-receiving coil 13, determines the absolute position of the position sensor rotor 200 in the measurement area based on the two signals, and outputs at least one angle signal 1; the second signal processing unit 4 receives, demodulates and processes the voltage signals generated by the third sub-receiving coil 15 and the fourth sub-receiving coil 16, determines the absolute position of the position sensor rotor 200 in the measurement area based on the two signals, and outputs at least one angle signal 2.

[0127] The first signal processing unit 3, the second signal processing unit 4, the first excitation coil 11, the first sub-receiving coil 12, the second sub-receiving coil 13, the second excitation coil 14, the third sub-receiving coil 15, and the fourth sub-receiving coil 16 are integrated into a common circuit board for detecting the absolute position of at least the same position sensor rotor 200 made of conductive material, i.e., for measuring the same angular displacement.

[0128] Alternatively, the first excitation coil 11 and the second excitation coil 14 are electrically connected, such as... Figure 12 As shown, the signal processing unit 300 injects a high-frequency oscillating carrier signal into the excitation coil 17. The excitation coil 17 generates a high-frequency alternating electromagnetic field due to the high-frequency oscillating carrier signal. The first sub-receiving coil 12, the second sub-receiving coil 13, the third sub-receiving coil 15, and the fourth sub-receiving coil 16 are each composed of an even number of coil loops with opposite polarities, each wound around a wire on a circuit board. Under the influence of the high-frequency alternating electromagnetic field generated only by the excitation coil 17, the induced electromotive forces generated by the coil loops cancel each other out. The first signal processing unit 3 receives, demodulates, and processes the voltage signals generated by the first sub-receiving coil 12 and the second sub-receiving coil 13, and the third sub-receiving coil 15 and the fourth sub-receiving coil 16. Based on the two signals, the absolute position of the position sensor rotor 200 in the measurement area is determined, and at least one integrated signal containing angle signal 1 and angle signal 2 is output.

[0129] The position sensor system 2000 according to an embodiment of the present invention can reduce the influence between the first excitation coil 11 and the second excitation coil 14, has higher structural stability, and the sensor has higher sensing accuracy.

[0130] In some embodiments, both the first excitation coil and the second excitation coil are fan-shaped rings, and the first excitation coil and the second excitation coil are arranged symmetrically; the signal processing unit is located in the gap area between the first excitation coil and the second excitation coil.

[0131] Specifically, the signal processing unit 300 can be arranged only in the first region 37 or the second region 38 of the circuit board, or it can be divided into two parts and arranged in the first region 37 and the second region 38 of the circuit board respectively. The first region 37 and the second region 38 of the circuit board are located in the region between the second coil group and the first coil group, and there is no overlap between them. The first region 37 and the second region 38 of the circuit board are symmetrical about the center point of the fan ring surrounded by the two coil groups. The distance between the outermost of the two regions and the circular point of the fan ring is less than or equal to the outer diameter of the fan ring of the coil group.

[0132] A fourth aspect of the present invention provides a motor 3000, such as Figure 13As shown, click 3000 includes the position sensor 1000 of the above embodiment.

[0133] The motor 3000 according to an embodiment of the present invention can reduce the influence between the first excitation coil 11 and the second excitation coil 14, has higher structural stability, and the sensor has higher sensing accuracy.

[0134] A fifth aspect of the present invention provides an electric powertrain 4000, such as... Figure 14 As shown, the electric power assembly 4000 includes the motor 3000 of the above embodiment.

[0135] The electric assembly 4000 according to an embodiment of the present invention can reduce the influence between the first excitation coil 11 and the second excitation coil 14, has higher structural stability, and the sensor has higher sensing accuracy.

[0136] A sixth aspect of the present invention provides an electronic pedal, including the position sensor 100 of the above embodiments, or the position sensor system 2000 of the above embodiments, or the motor 3000 of the above embodiments, or the electric assembly 4000 of the above embodiments.

[0137] According to the embodiment of the present invention, the electronic pedal can reduce the influence between the first excitation coil 11 and the second excitation coil 12, has higher structural stability, and the sensor has higher sensing accuracy.

[0138] A seventh aspect of the present invention provides a vehicle including the position sensor 100 of the above embodiments, or the position sensor system 1000 of the above embodiments, or the motor 3000 of the above embodiments, or the electric powertrain 4000 of the above embodiments.

[0139] The vehicle according to embodiments of the present invention has enhanced reliability and safety, and is more suitable for angular displacement measurement in critical safety systems.

[0140] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0141] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A position sensor stator, characterized in that, include: Circuit board; At least two receiving coil groups, a first excitation coil, and a second excitation coil are disposed on the circuit board; The at least two receiving coil groups, the first excitation coil, and the second excitation coil have the same geometric center point, and the first excitation coil and the second excitation coil have a distance between them in the radial direction.

2. The position sensor stator according to claim 1, characterized in that, Both the first excitation coil and the second excitation coil are symmetrical polygonal closed coils formed around the geometric center point, and the radial distance of the first excitation coil is greater than the radial distance of the second excitation coil.

3. The position sensor stator according to claim 2, characterized in that, The at least two receiving coil groups are located radially inside the first excitation coil.

4. The position sensor stator according to claim 3, characterized in that, The first portion of the receiving coil group in at least two receiving coil groups is located between the first excitation coil and the second excitation coil, and the second portion of the receiving coil group in at least two receiving coil groups is located on the radially inner side of the second excitation coil.

5. The position sensor stator according to claim 3, characterized in that, The at least two receiving coil groups are located between the first excitation coil and the second excitation coil.

6. The position sensor stator according to claim 3, characterized in that, Each receiving coil group includes at least two sub-receiving coils, each of which has a closed spoke-shaped structure symmetrical about the geometric center point, and the at least two sub-receiving coils are arranged to cross each other circumferentially.

7. The position sensor stator according to claim 1, characterized in that, Both the first excitation coil and the second excitation coil are fan-shaped rings, and the first excitation coil and the second excitation coil are arranged symmetrically.

8. The position sensor stator according to claim 7, characterized in that, The first excitation coil is arranged around a first portion of the at least two receiving coil groups, and the second excitation coil is arranged around a second portion of the at least two receiving coil groups, with the first and second receiving coil groups arranged symmetrically about the geometric center point.

9. The position sensor stator according to claim 8, characterized in that, Each receiving coil group includes at least two sub-receiving coils, each of which has a fan-shaped structure and is arranged to cross each other circumferentially.

10. The position sensor stator according to claim 6 or 9, characterized in that, Each sub-receiving coil in each receiving coil group is a closed coil formed by a curve that is based on a trigonometric function and extends in a spiral shape along the circumference.

11. The position sensor stator according to claim 10, characterized in that, Each sub-receiving coil in each receiving coil group includes a first receiving section and a second receiving section, wherein the polarity of the first receiving section is opposite to that of the second receiving section.

12. The position sensor stator according to claim 11, characterized in that, The circuit board includes multiple conductive layers, and each sub-receiving coil in each receiving coil group is disposed on at least two conductive layers in the circuit board.

13. The position sensor stator according to claim 12, characterized in that, Each sub-receiving coil in each receiving coil group has an inflection point, and the sub-receiving coils are arranged in layers at the inflection point.

14. The position sensor stator according to claim 13, characterized in that, In the radial direction, the wires in the sub-receiving coil located in different conductive layers are led out at the inflection point to the side away from the geometric center point for electrical connection.

15. The position sensor stator according to claim 1, characterized in that, The circuit board includes multiple conductive layers, and the first excitation coil is a single-turn coil or a multi-turn coil, and the first excitation coil is disposed on at least one conductive layer in the circuit board. The second excitation coil is a single-turn coil or a multi-turn coil, and the second excitation coil is disposed on at least one conductive layer in the circuit board.

16. The position sensor stator according to claim 1, characterized in that, The first excitation coil is electrically connected to the second excitation coil.

17. A position sensor, characterized in that, include: Position sensor rotor; The position sensor stator according to any one of claims 1-16, the position sensor stator being used to drive the position sensor rotor to rotate.

18. The position sensor according to claim 17, characterized in that, The position sensor rotor and the position sensor stator have the same geometric center point.

19. The position sensor according to claim 18, characterized in that, The position sensor rotor includes a substrate, on which a plurality of first conductive regions are arranged in a ring and symmetrically in the radial direction.

20. The position sensor according to claim 19, characterized in that, The first conductive region is a blade-shaped structure extending in the radial direction.

21. The position sensor according to claim 20, characterized in that, The substrate is further provided with a first annular conductive region, and the side of the plurality of first conductive regions near the geometric center point is connected to the first annular conductive region.

22. The position sensor according to claim 21, characterized in that, In the position sensor stator, the first part of the receiving coil group of at least two receiving coil groups is located inside the first excitation coil in the radial direction, and the second part of the receiving coil group of at least two receiving coil groups is located inside the second excitation coil in the radial direction. The substrate is further provided with a second annular conductive region, the radial distance of the first annular conductive region is smaller than the radial distance of the second annular conductive region, and the second annular conductive region is connected to the middle of the plurality of first conductive regions in the circumferential direction.

23. The position sensor according to claim 21 or 22, characterized in that, The non-conductive areas on the substrate are hollowed out.

24. The position sensor according to claim 20, characterized in that, The substrate is further provided with a first hollow area, which has a circular structure and is located in the middle of the substrate. The plurality of first conductive areas are arranged to surround the first hollow area in a ring shape.

25. The position sensor according to claim 18, characterized in that, In the position sensor stator, the first part of the receiving coil group of at least two receiving coil groups is located inside the first excitation coil in the radial direction, and the second part of the receiving coil group of at least two receiving coil groups is located inside the second excitation coil in the radial direction. The position sensor rotor includes a substrate, on which a second hollow area, a second conductive area, and a third conductive area are provided. The second hollow area has a circular structure and is located in the middle of the substrate. The plurality of second conductive areas are arranged in a ring around the edge of the second hollow area. The plurality of third conductive areas correspond one-to-one with the plurality of second conductive areas and are arranged in a ring around the outer edge of the second conductive area. The plurality of second conductive areas and the plurality of third conductive areas are symmetrically arranged in the radial direction.

26. The position sensor according to claim 25, characterized in that, The substrate includes a first surface and a second surface disposed opposite to each other, the plurality of second conductive regions are disposed on the first surface or the second surface, and the plurality of third conductive regions are disposed on the first surface or the second surface.

27. A position sensor system, characterized in that, include: The position sensor according to any one of claims 17-26; A signal processing unit, connected to the position sensor, is used to inject a carrier signal into the position sensor and generate an angle signal based on the voltage signal fed back by the position sensor.

28. The position sensor system according to claim 27, characterized in that, Both the first excitation coil and the second excitation coil are fan-shaped rings, and the first excitation coil and the second excitation coil are arranged symmetrically. The signal processing unit is located in the gap area between the first excitation coil and the second excitation coil.

29. An electric motor, characterized in that, Includes the position sensor described in any one of claims 17-26.

30. An electric powertrain, characterized in that, Includes the motor as described in claim 29.

31. An electronic pedal, characterized in that, It includes the position sensor as described in any one of claims 17-26, or the position sensor system as described in claim 27 or 28, or the motor as described in claim 29, or the electric assembly as described in claim 30.

32. A vehicle, characterized in that, It includes the position sensor as described in any one of claims 17-26, or the position sensor system as described in claim 27 or 28, or the motor as described in claim 29, or the electric assembly as described in claim 30.

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