JP2014122867A - Angle sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the number of turns of a planar coil constituting a sensor stator, an area thereof outward in a radial direction without being subjected to limitation of a connecting line.SOLUTION: A sensor stator of an angle sensor constitutes an SIN signal detection coil 10, and is arranged in a circumferential direction, and includes a series of circular arc coils 10A to 10D connected in series via a connecting line 15 (15a to 15e). One end 10b of each of the circular arc coils 10A to 10D is connected to a positive electrode terminal 16 via the connecting line 15d, and the other end 10c is connected to a negative electrode terminal 17 via the connecting line 15e. The connecting lines 15a to 15e are arranged in a range running short of a circumference of the circular arc coils along an array of the circular arc coils 10A to 10D, and with one end 10a of the circular arc coils 10A to 10D used as a return point, the single connecting line 15e connected to the one end 10a thereof is arranged in a state of vertically overlapped with the other connecting lines 15a to 15d. The connecting lines 15a to 15e pass through a central part in a radial direction of the circular arc coils 10A to 10D, and are arranged in a state of being vertically overlapped with the circular arc coils 10A to 10D. A COS signal detection coil 20 is similarly configured.

Description

  The present invention relates to an angle sensor that detects a rotation angle of an output shaft such as a motor or an engine.

  Conventionally, as this type of technology, for example, a resolver described in Patent Document 1 below is known. The resolver includes a resolver stator and a resolver rotor. The resolver stator includes a detection coil including a SIN signal detection coil and a COS signal detection coil, and a stator-side rotary transformer. The detection coil and the rotary transformer are each composed of a planar coil formed on the same stator substrate. The detection coil has an annular shape, and the rotary transformer is disposed inside the annular shape. Here, the detection coil is configured by electrically connecting a plurality of arc-shaped coils in series. A connecting wire (crossover wire) for connecting these arc-shaped coils in series is arranged on the outer peripheral side of the annular detecting coil with a gap from the detecting coil.

JP2012-163521A

  However, in the resolver described in Patent Document 1, since the connection line is arranged outside the detection coil having an annular shape with a gap from the detection coil, the connection line becomes a restriction, and the number of turns of the detection coil And the area could not be increased outward. For this reason, it is difficult to increase the magnetic force of the detection coil. If the number of turns and area of the detection coil is increased outside with the arrangement of the connection line as it is, the detection coil will be closer to the connection line, and the wraparound of the signal from the detection coil to the connection line will increase, and it will be detected as a resolver. There was a risk of reducing accuracy.

  The present invention has been made in view of the above circumstances, and the object thereof is to increase the number of turns and area of the planar coil constituting the sensor stator toward the outside in the radial direction without being restricted by the connection line. It is to provide an angle sensor.

  In order to achieve the above object, the invention according to claim 1 is provided with a sensor rotor attached to a rotating shaft and having a planar coil formed on a surface thereof, the surface facing the surface of the sensor rotor, An angle sensor including a sensor stator having a planar coil formed thereon, wherein the sensor stator is alternately disposed in the circumferential direction on the stator substrate and wound in a spiral shape on the stator substrate. A reverse planar coil that is electrically connected so as to be in reverse phase with respect to the planar coil and the forward planar coil and wound in a spiral shape, and a positive electrode that is disposed adjacent to each other and is connectable to an external device A forward plane coil and a reverse plane coil are connected in series via a connection line, and one end of both ends of a series of plane coils connected in series is connected via a connection line. The other end is connected to the positive electrode terminal, the other end is connected to the negative electrode terminal via the connection line, and the connection line is arranged in a range of less than one turn along the arrangement of a series of planar coils connected in series. One connection line connected to one end of the flat coil as a folding point is arranged so as to overlap vertically with respect to the other connection lines as a folding connection line, and so as to overlap vertically Is arranged so as to overlap vertically with a series of planar coils connected in series.

  According to the configuration of the present invention, the connecting wires arranged so as to overlap vertically are arranged so as to overlap vertically with the series of planar coils connected in series, so that the number of turns and the area of the series of planar coils are connected. No longer limited by lines.

  In order to achieve the above object, according to a second aspect of the present invention, in the first aspect of the present invention, the connecting wires arranged so as to overlap each other are arranged in the radial direction of a series of planar coils connected in series. It is intended that it is arranged to pass through the central part.

  According to the configuration of the above invention, in addition to the operation of the invention according to claim 1, since the connecting wire is arranged at the central portion in the radial direction of the planar coil, the position of the connecting wire is slightly shifted in the radial direction of the planar coil. However, the rate of change of magnetic flux of the planar coil is small.

  In order to achieve the above object, according to a third aspect of the present invention, in the second aspect of the present invention, the sensor stator is formed as a series of planar coils connected in series via a connection line, at a predetermined angle from each other. The SIN signal detection coil and the COS signal detection coil are arranged out of phase, and one end of each planar coil of the SIN signal detection coil and the COS signal detection coil is arranged at the spiral center and the other end is Arranged on the outer side in the radial direction of each planar coil, one end and the other end are arranged at the center in the circumferential direction of each planar coil, and one end of each planar coil is connected to the connection line at the radial center of each planar coil The other end of each planar coil is connected to the connecting line via a crossover connecting line extending radially outward of each planar coil, and the other planar coil of the SIN signal detecting coil and the COS signal detecting coil. One end of each planar coil is disposed at the center of the spiral shape, the other end is disposed radially inward of each planar coil, one end and the other end are disposed at the center in the circumferential direction of each planar coil, and one end of each planar coil is The purpose is that the planar coil is connected to the connection line at the radial center of each planar coil, and the other end of each planar coil is connected to the connection line via a transitional connection line extending radially inward of each planar coil.

  According to the configuration of the invention described above, in addition to the operation of the invention according to claim 2, the connecting line of the SIN signal detecting coil does not cross the connecting line of the COS signal detecting coil, and the connecting line of the COS signal detecting coil is It does not cross the connection line of the SIN signal detection coil.

  According to the first aspect of the present invention, the number of turns and the area of the planar coil constituting the sensor stator can be increased outward in the radial direction without being restricted by the connection line. As a result, the magnetic force of the planar coil can be increased, whereby the noise resistance of the planar coil can be improved and the error performance can be improved.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, it is possible to reduce the influence of signal wraparound from the planar coil to the connection line, and improve the signal detection accuracy of the planar coil. Can be made.

  According to the third aspect of the invention, in addition to the effect of the second aspect of the invention, it is possible to prevent a signal from wrapping between the SIN signal detection coil and the COS signal detection coil. And the detection accuracy of each signal of the COS signal detection coil can be improved.

Sectional drawing which shows a part of motor which concerns on one Embodiment and attached the angle sensor. The block diagram which shows the electrical structure which concerns on the same embodiment and concerns on an angle sensor. The disassembled perspective view which concerns on the embodiment and shows the structure of a sensor stator. According to the embodiment, the first coil layer, the second coil layer, the first connection line layer, and the second connection line layer are arranged one above the other and the stator-side rotary transformer is arranged inside the annular shape. FIG. The top view which shows the pattern image of a SIN signal detection coil according to the embodiment. The top view which shows the pattern image of a COS signal detection coil according to the embodiment. The top view which shows schematic structure of the pattern image of a SIN signal detection coil concerning the embodiment. The top view which shows schematic structure of the pattern image of a COS signal detection coil according to the embodiment. The top view which expands and shows one of the circular arc coils which comprise a SIN signal detection coil according to the same embodiment. The top view which expands and shows one circular-arc coil of FIG. 5 concerning the embodiment. The top view which expands and shows one circular-arc-shaped coil of FIG. 6 concerning the embodiment. The top view which concerns on the same embodiment and shows a 2nd coil layer. The top view which concerns on the same embodiment and shows a 1st connection line layer. The top view which concerns on the same embodiment and shows a 2nd connection line layer. FIG. 13 is a plan view illustrating a relationship between the SIN third coil and the SIN second coil in FIG. The top view which concerns on the same embodiment and shows a 1st coil layer etc. FIG. FIG. 17 is a plan view illustrating a relationship between the SIN first coil and the SIN fourth coil in FIG. The disassembled perspective view which concerns on the same embodiment and shows the structure of a sensor rotor.

  DETAILED DESCRIPTION Hereinafter, an embodiment of an angle sensor according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a sectional view showing a part of a motor 70 to which an angle sensor 9 according to this embodiment is attached. The motor 70 includes a motor case 71, a case cover 72 that covers the opening of the motor case 71, a motor stator 73 fixed to the motor case 71, a motor rotor 74 provided inside the motor stator 73, and the motor rotor 74. A motor shaft 75 as a rotation shaft provided integrally at the center, and a pair of bearings 76 and 77 that rotatably support the motor shaft 75 between the motor case 71 and the case cover 72 are provided.

  The motor case 71 and the case cover 72 are formed by casting an aluminum alloy or the like. The motor stator 73 includes a coil 78 and is fixed to the inner periphery of the motor case 71. The motor stator 73 is excited when the coil 78 is energized to generate a magnetic force.

  The motor rotor 74 includes a permanent magnet (not shown). The motor rotor 74 is held between the motor stator 73 via a predetermined gap. By energizing the motor stator 73 by energization, the motor rotor 74 rotates integrally with the motor shaft 75 to obtain driving force.

  As shown in FIG. 1, the angle sensor 9 is provided on the case cover 72 and the motor rotor 74. A sensor stator 7 constituting the angle sensor 9 is fixed to the case cover 72. A sensor rotor 8 constituting the angle sensor 9 is fixed to the motor rotor 74. In a state where the motor case 71 and the case cover 72 are assembled, the sensor rotor 8 and the sensor stator 7 are disposed so that the surfaces thereof face each other with a predetermined gap GA. By narrowing the gap GA, the detection accuracy of the angle sensor 9 can be improved. The size of the gap GA is preferably determined in consideration of dimensional tolerances, dimensional changes due to temperature, and the like.

  FIG. 2 is a block diagram showing an electrical configuration related to the angle sensor 9. The angle sensor 9 includes a SIN signal detection coil 10, a COS signal detection coil 20 and a stator side rotary transformer 30 provided in the sensor stator 7, and an excitation coil 40 and a rotor side rotary transformer 41 provided in the sensor rotor 8. The SIN signal detection coil 10 and the COS signal detection coil 20 are arranged with their phases shifted by a predetermined angle. The signal processing device 50 connected to the angle sensor 9 includes an excitation signal generation circuit 51, a first detection circuit 55, a second detection circuit 56, and a calculator 57. The excitation signal generation circuit 51 outputs a high frequency (480 kHz) excitation signal to the stator side rotary transformer 30. The first detection circuit 55 receives the SIN signal output from the SIN signal detection coil 10. The second detection circuit 56 receives the COS signal output from the COS signal detection coil 20. The computing unit 57 inputs the SIN signal and the COS signal output from the first and second detection circuits 55 and 56, respectively.

  In the signal processing device 50 described above, when an excitation signal is generated by the excitation signal generation circuit 51, the excitation signal is input to the rotor-side excitation coil 40 via the stator-side rotary transformer 30 and the rotor-side rotary transformer 41. . An electromotive force (SIN signal and COS signal) is generated in the SIN signal detection coil 10 and the COS signal detection coil 20 on the stator side by the magnetic flux generated by the current of the excitation signal. By analyzing the amplitude fluctuation of the electromotive force (SIN signal) generated in the SIN signal detection coil 10 and the amplitude fluctuation of the electromotive force (COS signal) generated in the COS signal detection coil 20, the rotational position of the sensor rotor 8 is determined. Can be calculated. That is, the first detection circuit 55 removes the high frequency component of the excitation signal from the SIN signal generated by the SIN signal detection coil 10. On the other hand, the second detection circuit 56 removes the high frequency component of the excitation signal from the COS signal generated by the COS signal detection coil 20. Then, the computing unit 57 calculates the current angular position of the sensor rotor 8 from the amplitude ratio between the output signal of the first detection circuit 55 and the output signal of the second detection circuit 56, and uses the calculation result as angle data. It is designed to output. As described above, in this embodiment, the angle sensor 9 with one excitation and two outputs is configured.

  Next, the configuration of the sensor stator 7 will be described in detail. FIG. 3 is an exploded perspective view showing the configuration of the sensor stator 7. As shown in FIG. 3, the sensor stator 7 includes, in order from the bottom, the stator substrate 1, the first insulating layer 2, the first coil layer 3, the second insulating layer 4, the second coil layer 5, the third insulating layer 6, A first connection line layer 11, a fourth insulating layer 12, a second connection line layer 13, and an overcoat 14 are provided. The stator substrate 1 is formed in a substantially annular plate shape by PPS resin and has high planarity. Stator substrate 1 includes three attachment portions 1a and one connector portion 1b on the outer periphery. The first insulating layer 2 has a substantially annular thin film shape and is formed on the stator substrate 1. The first coil layer 3 has a substantially annular shape and is formed on the first insulating layer 2. The second insulating layer 4 has a substantially annular thin film shape and is formed on the first coil layer 3. The second coil layer 5 has a substantially annular shape and is formed on the second insulating layer 4. The third insulating layer 6 has a substantially annular shape and is formed on the second coil layer 5. The first connection line layer 11 has a substantially C shape and is formed on the third insulating layer 6. The fourth insulating layer 12 has a substantially annular shape and is formed on the first connection line layer 11. The second connection line layer 13 has a substantially C shape and is formed on the fourth insulating layer 12. The overcoat 14 has a substantially annular shape and is formed so as to cover the second connection line layer 13.

  In FIG. 3, the first coil layer 3, the second insulating layer 4, the second coil layer 5, the third insulating layer 6, the first connecting line layer 11, the fourth insulating layer 12, and the second connecting line layer 13 The SIN signal detection coil 10 and the COS signal detection coil 20 are configured. That is, the first coil layer 3 and the second coil layer 5 that are formed so as to overlap each other with the second insulating layer 4 interposed therebetween are connected to each other via the first connection line layer 11 and the second connection line layer 13. By doing so, the SIN signal detection coil 10 and the COS signal detection coil 20 as planar coils are respectively configured. As shown in FIG. 1, the sensor stator 7 is disposed so that the surface thereof faces the surface of the sensor rotor 8. A SIN signal detection coil 10 and a COS signal detection coil 20 are formed on the surface of the sensor stator 7.

  In FIG. 4, the first coil layer 3, the second coil layer 5, the first connection line layer 11, and the second connection line layer 13 are arranged one above the other and the stator-side rotary transformer 30 is arranged inside the annular shape. This state is shown by a plan view. The SIN signal detection coil 10 and the COS signal detection coil 20 are formed by the coil layers 3 and 5 and the connection line layers 11 and 13 excluding the rotary transformer 30.

  FIG. 5 is a plan view showing a pattern image of the SIN signal detection coil 10 as a planar coil of the present invention. FIG. 6 is a plan view showing a pattern image of the COS signal detection coil 20 as a planar coil of the present invention. As shown in FIG. 5, the SIN signal detection coil 10 has a substantially circular shape as a whole, and has four arcs arranged at phase positions of “180 degrees” in electrical angle (“90 degrees in mechanical angle”). Coils 10A, 10B, 10C, and 10D are provided. Each of the arcuate coils 10 </ b> A to 10 </ b> D is arranged on the stator substrate 1 in the circumferential direction. Each of the arcuate coils 10A to 10D is connected in series via a connecting line 15 arranged so as to pass through the radial center portion thereof. Both ends of the connection line 15 are connected to a positive terminal 16 and a negative terminal 17 which are disposed adjacent to each other outside the arc-shaped coil 10B. Both terminals 16 and 17 are provided so as to be connectable to an external device. As will be described later, each of the arcuate coils 10A to 10D is formed by connecting coil wires that are divided into two in the circumferential direction and divided into two in the radial direction.

  Similarly, as illustrated in FIG. 6, the COS signal detection coil 20 has a substantially annular shape as a whole, and is arranged at phase positions of “180 degrees” in electrical angle (“90 degrees in mechanical angle”). Two arcuate coils 20A, 20B, 20C, 20D are provided. Each of the arcuate coils 20 </ b> A to 20 </ b> D is arranged on the stator substrate 1 in the circumferential direction. Each of the arcuate coils 20A to 20D is connected in series via a connection line 25 arranged so as to pass through the radial center portion thereof. Both ends of the connection line 25 are connected to a positive terminal 26 and a negative terminal 27 arranged adjacent to each other outside the arc-shaped coil 20D. As shown in FIG. 4, the connection line 25 is disposed along the connection line 15 described above. Both terminals 26 and 27 are provided so as to be connectable to an external device. As will be described later, each of the arcuate coils 20A to 20D is formed by connecting coil wires that are divided into two in the circumferential direction and also divided into two in the radial direction. The SIN signal detection coil 10 and the COS signal detection coil 20 are arranged on the same axis, and are arranged so that the phases of the coils 10 and 20 are shifted by “90 degrees” in electrical angle (“45 degrees in mechanical angle”).

  FIG. 7 is a plan view showing a schematic configuration of a pattern image of the SIN signal detection coil 10. FIG. 8 shows a schematic configuration of a pattern image of the COS signal detection coil 20 in a plan view. As shown in FIG. 7, the SIN signal detection coil 10 includes a forward arc coil 10B, 10D as a forward planar coil wound in a spiral shape, and a spiral wound in the reverse direction with respect to the forward planar coil. It includes reverse arc-shaped coils 10A and 10C as reverse planar coils that are electrically connected so as to be in phase, and a positive electrode terminal 16 and a negative electrode terminal 17. The forward arcuate coils 10B and 10D and the reverse arcuate coils 10A and 10C are alternately arranged in the circumferential direction. The positive electrode terminal 16 and the negative electrode terminal 17 are disposed adjacent to each other on the outer peripheral side of the forward arcuate coil 10B. The forward arcuate coils 10B and 10D and the reverse arcuate coils 10A and 10C are connected in series via intermediate connection lines 15a, 15b and 15c. One end of both ends of the series of arc-shaped coils 10A to 10D connected in series is connected to the positive terminal 16 via the first end connection line 15d, and the other end is connected to the negative terminal 17 via the second end connection line 15e. Connected to. The connection lines 15a to 15e constituting the connection line 15 are arranged so as to overlap each other with a third insulating layer 6 interposed between a series of arc-shaped coils 10A to 10D connected in series. It arrange | positions in the range which is less than 1 round along the arrangement | sequence of 10A-10D. (In FIG. 7, for the sake of convenience, the connection lines 15a to 15e are arranged on the outer peripheral side of each of the arcuate coils 10A to 10D.) One end 10a of the series of arcuate coils 10A to 10D serves as a turning point. The second end connection line 15e as a return connection line connected to the one end 10a (turnback point) is disposed along the intermediate connection lines 15a to 15c and the first end connection line 15d as other connection lines, and is a negative electrode. Connected to terminal 17. In this embodiment, as shown in FIG. 5, the second end connection line 15e as the folded connection line overlaps the other connection lines 15a to 15d with the fourth insulating layer 12 interposed therebetween. (In FIG. 7, they are shown side by side for convenience.) In FIG. 5, the connection lines 15 a to 15 e illustrated in FIG. 7 are collectively shown as the connection line 15.

  As shown in FIG. 8, the COS signal detection coil 20 includes a forward arcuate coil 20B, 20D as a forward planar coil wound in a spiral shape, and a spiral wound reversely with respect to the forward planar coil. It includes reverse arc-shaped coils 20A and 20C as reverse planar coils that are electrically connected so as to be in phase, and a positive electrode terminal 26 and a negative electrode terminal 27. The forward arcuate coils 20B and 20D and the reverse arcuate coils 20A and 20C are alternately arranged in the circumferential direction. The positive electrode terminal 26 and the negative electrode terminal 27 are disposed adjacent to each other on the outer peripheral side of the forward arcuate coil 20D. The forward arcuate coils 20B and 20D and the reverse arcuate coils 20A and 20C are connected in series via intermediate connection lines 25a, 25b, and 25c. One end of both ends of the series of arc-shaped coils 20A to 20D connected in series is connected to the positive terminal 26 via the first end connection line 25d, and the other end is connected to the negative terminal 27 via the second end connection line 25e. Connected to. The connection lines 25a to 25e constituting the connection line 25 are arranged so as to overlap each other with a third insulating layer 6 interposed between a series of arc-shaped coils 20A to 20D connected in series. It arrange | positions in the range which is less than 1 round along the arrangement | sequence of 20A-20D. (In FIG. 8, for the sake of convenience, the connection wires 25a to 25e are arranged on the outer peripheral side of the arcuate coils 20A to 20D.) One end 20a of the series of arcuate coils 20A to 20D serves as a turning point. A second end connection line 25e as a folded connection line connected to the one end 20a (folding point) is disposed along the intermediate connection lines 25a to 25c and the first end connection line 25d, which are other connection lines, and is a negative terminal. 27. In this embodiment, as shown in FIG. 6, the second end connection line 25e as the folded connection line overlaps with the other connection lines 25a to 25d with the fourth insulating layer 12 interposed therebetween. (In FIG. 8, they are shown side by side for convenience.) In FIG. 6, the connection lines 25 a to 25 e illustrated in FIG. 8 are collectively shown as the connection line 25.

  In FIG. 9, as one of the arc-shaped coils 10A to 10D constituting the SIN signal detecting coil 10, the arc-shaped coil 10A is representatively extracted, enlarged, and shown in a plan view. As shown in FIGS. 5, 7, and 9, one end 10 b and the other end 10 c of each of the arcuate coils 10 </ b> A to 10 </ b> D are disposed at a center position in the circumferential direction of each of the arcuate coils 10 </ b> A to 10 </ b> D. That is, each of the arcuate coils 10A to 10D has a substantially bilaterally symmetric shape around the symmetry axis L1 extending in the radial direction at the center position in the circumferential direction. One end 10b and the other end 10c of each of the arcuate coils 10A to 10D are disposed on the symmetry axis L1 of each of the arcuate coils 10A to 10D. And each arc-shaped coil 10A-10D connected to each connection line 15a-15e receives an electric current from the center position of the circumferential direction, and comes out of an electric current from the center position.

  As shown in FIG. 9, for each of the arcuate coils 10 </ b> A to 10 </ b> D, one end 10 b is arranged at the center of the arcuate coils 10 </ b> A to 10 </ b> D, and the other end 10 c is arranged outside the arc of the arcuate coils 10 </ b> A to 10 </ b> D. As a result, the arc-shaped coils 10A to 10D are externally wound. And in order to make the arrangement | sequence of the coil wire group 100 which comprises each arc-shaped coil 10A-10D symmetrical about the symmetry axis L1, the arrangement | sequence of the coil wire group 100 is arranged between the one end 10b and the other end 10c. A displacement portion 100a that is displaced in the radial direction is formed.

  As shown in FIG. 5, in the SIN signal detection coil 10, the connection lines 15 (15a to 15e) overlap with a series of arcuate coils 10A to 10D connected in series, and a series of arcuate shapes. It arrange | positions so that the radial direction center part of the coils 10A-10D may be passed. In addition, as shown in FIG. 7, each arcuate coil 10 </ b> A to 10 </ b> D is provided with a connecting wire 15 f extending in the radial direction from the outer other end 10 c toward the connecting wires 15 a to 15 e.

  Further, as shown in FIGS. 6 and 8, one end 20 b and the other end 20 c of each arcuate coil 20 </ b> A to 20 </ b> D constituting the COS signal detection coil 20 are also each arcuate coil 10 </ b> A to 10 </ b> A constituting the SIN signal detection coil 10. Similarly to 10D, each arcuate coil 20A to 20D is arranged at the center position in the circumferential direction. That is, each of the arcuate coils 20A to 20D has a bilaterally symmetric shape around the symmetry axis L1 extending in the radial direction at the center position in the circumferential direction. One end 20b and the other end 20c of each arcuate coil 20A-20D are disposed on the axis of symmetry L1 of each arcuate coil 20A-20D. And each arc-shaped coil 20A-20D connected to each connection line 25a-25e receives an electric current from the center position of the circumferential direction, and comes out of an electric current from the center position.

  However, in each of the arcuate coils 20A to 20D, one end 20b is arranged at the center of the arcuate coils 20A to 20D as in the arcuate coils 10A to 10D, but the other end 20c is an arc of the arcuate coils 20A to 20D. Placed inside. Thereby, the arc-shaped coils 20A to 20D are internally wound. And in order to make the arrangement | sequence of the coil wire group which comprises each arc-shaped coil 20A-20D symmetrical about the symmetry axis L1, each arc-shaped coil 10A-10D between the one end 20b and the other end 20c, Similarly, a displacement portion (not shown) that displaces the array of coil wire groups in the radial direction is formed.

  As shown in FIG. 6, in the COS signal detection coil 20, the connection lines 25 (25a to 25e) overlap vertically with a series of arcuate coils 20A to 20D connected in series, and a series of arcuate shapes. It arrange | positions so that the radial direction center part of the coils 20A-20D may be passed. Further, as shown in FIG. 8, each arcuate coil 20 </ b> A to 20 </ b> D is provided with a connection line 25 f extending in the radial direction from the inner other end 20 c toward the connection lines 25 a to 25 e.

  FIG. 10 is an enlarged plan view of the arcuate coil 10D shown in FIG. FIG. 11 is an enlarged plan view of the arcuate coil 20B shown in FIG. In this embodiment, as shown in FIG. 10, each of the arcuate coils 10A to 10D constituting the SIN signal detection coil 10 is externally wound, so that the other end 10c (10a) and each of the connection lines 15a to 15e are connected. The connecting connection line 15f to be connected extends outward in the radial direction of the SIN signal detection coil 10 (arc-shaped coils 10A to 10D). On the other hand, as shown in FIG. 11, each arc-shaped coil 20A-20D constituting the COS signal detection coil 20 has an inner winding, so that the other end 20c (20a) and each connection line 25a-25e are connected. The crossover connection line 25f extends toward the inside in the radial direction of the COS signal detection coil 20 (arc-shaped coils 20A to 20D).

  That is, as shown in FIG. 10, in this embodiment, one end 10b of each arc-shaped coil 10A to 10D of the SIN signal detection coil 10 is arranged at the spiral center, and the other end 10c (10a) is each arc-shaped coil. It arrange | positions at the radial direction outer side of 10A-10D. Moreover, the one end 10b and the other end 10c (10a) are arrange | positioned in the center position of the circumferential direction of each arc-shaped coil 10A-10D. Then, one end 10b of each arcuate coil 10A to 10D is connected to the intermediate connection lines 15a to 15c at the radial center of each arcuate coil 10A to 10D, and the other end 10c (10a) of each arcuate coil 10A to 10D. ) Is connected to the second end connection line 15e via a cross connection line 15f extending radially outward of each of the arcuate coils 10A to 10D.

  Further, as shown in FIG. 11, one end 20b of each arc-shaped coil 20A-20D of the COS signal detection coil 20 is disposed at the center of the spiral shape, and the other end 20c (20a) is a diameter of each arc-shaped coil 20A-20D. Arranged inside the direction. Moreover, the one end 20b and the other end 20c (20a) are arrange | positioned in the center position of the circumferential direction of each arc-shaped coil 20A-20D, and the one end 20b of each arc-shaped coil 20A-20D is the diameter of each arc-shaped coil 20A-20D. The other ends 20c (20a) of the respective arcuate coils 20A to 20D are connected to the connecting wires 25a to 25d at the central portion in the direction, and are connected via the connecting wires 25f extending inward in the radial direction of the respective arcuate coils 20A to 20D. Connected to the two-end connection line 25e.

  As described above, the transition connection line 15f of the SIN signal detection coil 10 and the transition connection line 25f of the COS signal detection coil 20 are arranged in different directions, so that the transition connection line 15f of the SIN signal detection coil 10 becomes the COS signal. Do not cross the connection line 25 (25a to 25e) of the detection coil 20, and do not cross the connection line 25f of the COS signal detection coil 20 to the connection line 15 (15a to 15e) of the SIN signal detection coil 10. It has become.

  FIG. 12 is a plan view showing the second coil layer 5 and the like. FIG. 13 is a plan view showing the first connection line layer 11 and the like. FIG. 14 is a plan view showing the second connection line layer 13 and the like. The coil pattern of the second coil layer 5 is formed by drawing conductive ink on the surface of the second insulating layer 4 by printing and then baking it. As shown in FIG. 12, the second coil layer 5 having a substantially annular shape includes four SIN second coils 12A, 12B, 12C, and 12D that constitute the SIN signal detection coil 10, which are electrically connected to the outer peripheral side. They are arranged at different positions by “180 degrees” in angle (“90 degrees in machine angle”). Further, as shown in FIG. 12, the second coil layer 5 includes four SIN third coils 13A, 13B, 13C, and 13D on the inner peripheral side, which are “180 degrees” in electrical angle on the inner peripheral side. They are arranged at different positions (“90 degrees in mechanical angle”). These SIN third coils 13A to 13D are arranged at positions shifted in phase by 90 degrees in electrical angle (45 degrees in mechanical angle) with respect to SIN second coils 12A to 12D. .

  As shown in FIG. 12, COS third coils 23 </ b> C, 23 </ b> D, 23 </ b> A, and 23 </ b> B constituting the COS signal detection coil 20 are arranged on the inner peripheral side of the SIN second coils 12 </ b> A to 12 </ b> D. In addition, COS second coils 22B, 22C, 22D, and 22A constituting the COS signal detection coil 20 are arranged on the outer peripheral side of the SIN third coils 13A to 13D. These COS third coils 23A to 23D are arranged at positions shifted in phase by 90 degrees in electrical angle ("45 degrees in mechanical angle") with respect to the COS second coils 22A to 22D. .

  As shown in FIG. 12, an annular coil 31 constituting the stator-side rotary transformer 30 is arranged inside the SIN third coils 13A to 13D and the COS third coils 23A to 23D arranged in an annular shape. The

  FIG. 15 is a plan view showing the relationship between the SIN third coils 13A to 13D and the SIN second coils 12A to 12D in FIG. 12, with only the SIN third coil 13A and the SIN second coil 12A extracted and enlarged. As shown in FIG. 15, the SIN second coil 12A includes ten coil wires 120, 121, 122, 123, 124, 125, 126, 127, 128, and 129 that constitute a substantially rectangular quarter portion. . These coil wires 120 to 129 are formed and arranged so as to increase sequentially from the inner peripheral side to the outer peripheral side. Each of the coil wires 120 to 129 includes a first end 120a, 121a, 122a, 123a, 124a, 125a, 126a, 127a, 128a, 129a and a second end 120b, 121b, 122b, 123b, 124b, 125b, 126b, 127b, 128b, 129b.

  Similarly, as shown in FIG. 15, the SIN third coil 13A includes ten coil wires 130, 131, 132, 133, 134, 135, 136, 137, 138, which constitute a substantially rectangular quarter portion. 139. These coil wires 130 to 139 are formed and arranged so as to increase sequentially from the outer peripheral side to the inner peripheral side. Each of the coil wires 130 to 139 includes a first end 130a, 131a, 132a, 133a, 134a, 135a, 136a, 137a, 138a, 139a and a second end 130b, 131b, 132b, 133b, 134b, 135b, 136b, 137b, 138b, 139b.

  FIG. 16 is a plan view showing the first coil layer 3. The coil pattern of the first coil layer 3 is formed by drawing conductive ink on the surface of the first insulating layer 2 by printing and then baking. As shown in FIG. 16, the substantially coiled first coil layer 3 includes four SIN first coils 11A, 11B, 11C, and 11D that constitute the SIN signal detection coil 10, which are arranged on the outer peripheral side. They are arranged at different positions by “180 degrees” in electrical angle (“90 degrees in mechanical angle”). Further, as shown in FIG. 16, the first coil layer 3 includes four SIN fourth coils 14A, 14B, 14C, and 14D constituting the SIN signal detection coil 10, which are electrically angled on the inner peripheral side. Are arranged at different positions by "180 degrees" (mechanical angle "90 degrees"). These SIN fourth coils 14A to 14D are arranged at positions that are out of phase with respect to the SIN first coils 11A to 11D by an electrical angle of "90 degrees" (mechanical angle of "45 degrees") counterclockwise. .

  As shown in FIG. 16, COS fourth coils 24 </ b> B, 24 </ b> C, 24 </ b> D, 24 </ b> A constituting the COS signal detection coil 20 are arranged on the inner peripheral side of the SIN first coils 11 </ b> A to 11 </ b> D. In addition, COS first coils 21C, 21D, 21A, and 21B that constitute the COS signal detection coil 20 are disposed on the outer peripheral side of the SIN fourth coils 14A to 14D. The COS first coils 21A to 21D are arranged at positions shifted in phase by 90 degrees in electrical angle (45 degrees in mechanical angle) with respect to the COS fourth coils 24A to 24D. .

  As shown in FIG. 16, an annular coil 32 constituting the stator-side rotary transformer 30 is arranged inside the SIN fourth coils 14 </ b> A to 14 </ b> D and the COS fourth coils 24 </ b> A to 24 </ b> D arranged in an annular shape. The

  FIG. 17 is a plan view illustrating the relationship between the SIN first coils 11A to 11D and the SIN fourth coils 14A to 14D in FIG. 16, with only the SIN first coil 11A and the SIN fourth coil 14A extracted and enlarged. As shown in FIG. 17, the SIN first coil 11A includes ten coil wires 110, 111, 112, 113, 114, 115, 116, 117, 118, and 119 constituting a substantially rectangular quarter portion. . These coil wires 110 to 119 are formed and arranged so as to increase sequentially from the inner peripheral side to the outer peripheral side. Each of the coil wires 110 to 119 includes a first end 110a, 111a, 112a, 113a, 114a, 115a, 116a, 117a, 118a, 119a and a second end 110b, 111b, 112b, 113b, 114b, 115b, 116b, 117b, 11f8b, and 119b.

  Similarly, as shown in FIG. 17, the SIN fourth coil 14A includes ten coil wires 140, 141, 142, 143, 144, 145, 146, 147, 148, constituting a substantially rectangular quarter portion. 149. These coil wires 140 to 149 are formed and arranged so as to increase sequentially from the outer peripheral side to the inner peripheral side. Each of the coil wires 140 to 149 includes a first end 140a, 142a, 143a, 144a, 145a, 146a, 147a, 148a, 149a and a second end 140b, 141b, 142b, 143b, 144b, 145b, 146b, 147b, 148b, 149b.

  Next, the configuration of the SIN signal detection coil 10 will be described in more detail. A positive terminal 16 shown in FIG. 13 is a terminal for the SIN signal detection coil 10. The positive terminal 16 is connected to the end of the coil wire 129 of the SIN second coil 12C shown in FIGS. 12 and 15 by the first end connection line 15d and the first crossover connection line 15f shown in FIGS. 129a. The end 129b of the coil wire 129 of the SIN second coil 12C is connected to the end 149b of the coil wire 149 of the SIN fourth coil 14C shown in FIGS. The end 149a of the coil wire 149 of the SIN fourth coil 14C is connected to the end 139a of the coil wire 139 of the SIN third coil 13C shown in FIGS. The end 139b of the coil wire 130 of the SIN third coil 13C is connected to the end 119b of the coil wire 119 of the SIN first coil 11C shown in FIGS. In this way, the outermost winding portions (turns) are formed by the outermost coil wires 129, 149, 139, and 119 of the SIN second coil 12C, the SIN fourth coil 14C, the SIN third coil 13C, and the SIN first coil 11C. ) Is configured. Here, the coil wires 149 and 119 of the first coil layer 3 and the coil wires 129 and 139 of the second coil layer 5 are connected through the through holes 4a of the second insulating layer 4 (the same applies hereinafter). ).

  Further, the end 119a of the coil wire 119 of the SIN first coil 11C shown in FIGS. 16 and 17 is connected to the end 128a of the coil wire 128 of the SIN second coil 12C shown in FIGS. Then, similarly to the outermost coil wires 129, 149, 139, and 119 of the SIN second coil 12C, the SIN fourth coil 14C, the SIN third coil 13C, and the SIN first coil 11C, the SIN second coil 12C, The inner turns adjacent to the outermost periphery are constituted by the coil wires 128, 148, 138, 118 of the SIN fourth coil 14C, the SIN third coil 13C, and the SIN first coil 11C. Similarly, inner coils are sequentially formed, and finally, the innermost coil wires 120, 140, and 130 of the SIN second coil 12C, the SIN fourth coil 14C, the SIN third coil 13C, and the SIN first coil 11C. , 110 constitute the innermost turn. In this manner, the arc-shaped coil 10C is configured as a clockwise spiral coil by the SIN second coil 12C, the SIN fourth coil 14C, the SIN third coil 13C, and the SIN first coil 11C.

  The end 110a of the coil wire 110 of the SIN first coil 11C constituting the innermost turn of the arc-shaped coil 10C described above is shown in FIGS. 12 and 15 through the intermediate connection line 15a shown in FIGS. Is connected to the end 120a of the innermost coil wire 120 of the SIN second coil 12D. The end 120b of the coil wire 120 of the SIN second coil 12D is connected to the end 140b of the coil wire 140 of the SIN fourth coil 14D shown in FIGS. The end 140a of the coil wire 140 of the SIN fourth coil 14D is connected to the end 130a of the coil wire 130 of the SIN third coil 13D shown in FIGS. The end 130b of the coil wire 130 of the SIN third coil 13D is connected to the end 110b of the coil wire 110 of the SIN first coil 11D shown in FIGS. In this way, the innermost turns of the innermost coil wires 120, 140, 130, and 110 of the SIN second coil 12D, the SIN fourth coil 14D, the SIN third coil 13D, and the SIN first coil 11D Composed.

  Also, the end 110a of the coil wire 110 of the SIN first coil 11D shown in FIGS. 16 and 17 is connected to the end 121a of the coil wire 121 of the SIN second coil 12D shown in FIGS. The SIN second coil 12D is the same as the innermost coil wires 120, 140, 130, 110 of the SIN second coil 12D, the SIN fourth coil 14D, the SIN third coil 13D, and the SIN first coil 11D. The outer turns adjacent to the innermost circumference are constituted by the coil wires 121, 141, 131, 111 of the SIN fourth coil 14D, the SIN third coil 13D, and the SIN first coil 11D. Similarly, outer coils are sequentially formed, and finally, the outermost coil wires 129, 149, 139, SIN second coil 12D, SIN fourth coil 14D, SIN third coil 13D, and SIN first coil 11D are formed. 119 constitutes the outermost turn. In this manner, the arc-shaped coil 10D is configured as a counterclockwise spiral coil by the SIN second coil 12D, the SIN fourth coil 14D, the SIN third coil 13D, and the SIN first coil 11D.

  Similarly, the arc-shaped coil 10A is configured as a clockwise spiral coil by the SIN first coil 11A, the SIN third coil 13A, the SIN fourth coil 14A, and the SIN second coil 12A. Further, the arc-shaped coil 10B is configured as a counterclockwise spiral coil by the SIN second coil 12B, the SIN fourth coil 14B, the SIN third coil 13B, and the SIN first coil 11B.

  The four arc-shaped coils 10A, 10B, 10C, and 10D configured as described above constitute a SIN signal detection coil 10 that has a substantially annular shape.

  The COS signal detection coil 20 is also composed of four arcuate coils 20A, 20B, 20C, and 20D that are divided in the circumferential direction. One arcuate coil 20A includes a COS first coil 21A, a COS second coil 22A, a COS third coil 23A, and a COS fourth coil 24A. Here, the COS first coil 21A and the COS fourth coil 24A are formed in the first coil layer 3 as shown in FIG. 16, and the COS second coil 22A and the COS third coil 23A are as shown in FIG. It is formed on the second coil layer 5.

  The configuration of the remaining arcuate coils 20B, 20C, and 20D is basically the same as that of the arcuate coil 20A described above. The COS signal detection coil 20 is connected to the positive terminal 26 and the negative terminal 27 shown in FIGS. 13 and 14. The two arcuate coils 20A and 20C constituting the COS signal detection coil 20 are configured as a clockwise spiral coil while going back and forth between the first coil layer 3 and the second coil layer 5. Further, the other two arc-shaped coils 20B and 20D constituting the COS signal detection coil 20 are configured as a counterclockwise spiral coil while going back and forth between the first coil layer 3 and the second coil layer 5. .

  The coils 31 and 32 shown in FIGS. 12 and 16 constitute the stator-side rotary transformer 30 and are connected to the terminals 35 and 36 via the cross connection lines 33 and 34 as shown in FIGS. 13 and 14.

  Next, the configuration of the sensor rotor 8 will be described in detail. FIG. 18 is an exploded perspective view showing the configuration of the sensor rotor 8. As shown in FIG. 18, the sensor rotor 8 includes a rotor substrate 61 from below, a first coil layer 62 formed on the surface of the rotor substrate 61, and an insulating layer 63 formed on the first coil layer 62. The second coil layer 64 formed on the insulating layer 63 and the overcoat 65 which is a protective film formed on the second coil layer 64 are provided.

  The rotor substrate 61 is formed in a circular plate shape from a nonmagnetic conductive metal such as aluminum or brass, and has a circular hole 61a at the center. A recess 61 b is formed on the surface of the rotor substrate 61. The recess 61b is filled with a resin such as PPS, and the resin is solidified.

  The insulating layer 63 and the overcoat 65 are formed in an annular thin film shape by an insulating material. Through holes 63a are formed in the insulating layer 63 in various places.

  The first coil layer 62 includes arcuate coils 62a, 62b, 62c, and 62d as four planar coils arranged so as to form an annular shape as a whole. The second coil layer 64 also includes arcuate coils 64a, 64b, 64c, and 64d as four planar coils arranged so as to form an annular shape as a whole. One ends of the arc-shaped coils 62 a to 62 d constituting the first coil layer 62 are connected to the coil 41 a constituting the rotor-side rotary transformer 41. The other ends of the four arc-shaped coils 62 a to 62 d are connected to one end of the arc-shaped coils 64 a to 64 d constituting the second coil layer 64 through the through hole 63 a of the insulating layer 63. The other ends of the four arc-shaped coils 64 a to 64 d are connected to a coil 41 b that constitutes the rotor-side rotary transformer 41. The other end of the coil 41a and the other end of the coil 41b are connected via a through hole 63a in the insulating layer 63.

  The exciting coil 40 is configured by the four arc-shaped coils 62 a to 62 d constituting the first coil layer 62 and the four arc-shaped coils 64 a to 64 d constituting the second coil layer 64.

  According to the angle sensor 9 of this embodiment described above, as shown in FIG. 7, the SIN signal detection coils 10 constituting the sensor stator 7 are alternately arranged in the circumferential direction and connected in series. Of both ends of the direction arcuate coils 10B and 10D and the reverse arcuate coils 10A and 10C, one end is connected to the positive terminal 16 via the first end connection line 15d and the other end is connected to the second end connection line 15e. To the negative terminal 17. Here, each connection line 15a-15e is arrange | positioned in the range which is less than 1 round along the arrangement | sequence of a series of arc-shaped coils 10A-10D. Further, with the one end 10a of the series of arcuate coils 10A to 10D as a turning point, a second end connecting line 15e as a turning connecting line connected to the one end a overlaps with the other connecting lines 15a to 15d. Are arranged and connected to the negative terminal 17. Therefore, since each connection line 15a-15e is arrange | positioned in the range which is less than 1 round along the arrangement | sequence of a series of arc-shaped coils 10A-10D, the whole connection line 15a-15e substantially comprises a loop antenna. There is nothing. For this reason, it can be made hard to receive the influence of the electromagnetic noise from the outside with respect to the whole connecting wires 15a-15e. Further, since the second end connection line 15e is arranged so as to overlap vertically with respect to the other connection lines 15a to 15d, the current is reversed between the second end connection line 15e and the other connection lines 15a to 15d. The electromagnetic noise entering from the outside into the second end connection line 15e and the electromagnetic noise entering from the outside into the other connection lines 15a to 15d cancel each other. For this reason, it is possible to reduce the influence of external electromagnetic noise on the SIN signal detection coil 10.

  Further, according to the angle sensor 9 of this embodiment, as shown in FIG. 8, a series of forward directions in which the COS signal detection coils 20 constituting the sensor stator 7 are alternately arranged in the circumferential direction and connected in series. Of both ends of the arcuate coils 20B and 20D and the arcuate coils 20A and 20C in the reverse direction, one end is connected to the positive terminal 26 via the first end connection line 25d and the other end is connected to the second end connection line 25e. Connected to the negative terminal 27. Here, the connection lines 25a to 25e are arranged in a range of less than one turn along the arrangement of the series of arcuate coils 20A to 20D. Also, with one end 20a of the series of arcuate coils 20A to 20D as a turning point, a second end connecting line 25e as a turning connecting line connected to the one end 20a overlaps the other connecting lines 25a to 25d vertically. Are arranged and connected to the negative terminal 27. Accordingly, since the connection lines 25a to 25e are arranged in a range of less than one turn along the arrangement of the series of arcuate coils 20A to 20D, the entire connection lines 25a to 25e substantially constitute a loop antenna. There is nothing. For this reason, it can be made hard to receive the influence of the electromagnetic noise from the outside with respect to the whole connection lines 25a-25e. Further, since the second end connection line 25e is arranged so as to overlap vertically with respect to the other connection lines 25a to 25d, the current is reversed between the second end connection line 25e and the other connection lines 25a to 25d. The electromagnetic noise entering from the outside into the second end connection line 25e and the electromagnetic noise entering from the outside into the other connection lines 25a to 25d cancel each other. For this reason, it is possible to reduce the influence of external electromagnetic noise on the COS signal detection coil 20. Since the influence of electromagnetic noise on the SIN signal detection coil 10 and the COS signal detection coil 20 can be reduced as described above, the detection accuracy and performance of the angle sensor 9 can be improved.

  In this embodiment, connecting lines 15 (15a to 15e) and 25 (25a to 25e) arranged to overlap each other are vertically connected to a series of arcuate coils 10A to 10D and 20A to 20D connected in series. Since they are arranged so as to overlap, the number of turns and the area of the series of arcuate coils 10A to 10D, 20A to 20D are not restricted by the connection lines 15 (15a to 15e) and 25 (25a to 25e). Therefore, for each of the SIN signal detection coil 10 and the COS signal detection coil 20, the number of turns and the area of each of the arcuate coils 10A to 10D and 20A to 20D can be reduced without being restricted by the connection lines 15a to 15e and 25a to 25e. It can be increased toward the outside in the direction. For example, in this embodiment, the number of turns of each of the arc-shaped coils 10A to 10D and 20A to 20D can be increased from 7 to 10 for each arc-shaped coil of the conventional example. Further, since the number of turns and the area can be increased, the magnetic force of each of the arcuate coils 10A to 10D and 20A to 20D can be increased, and the influence of external noise can be reduced. As a result, the noise resistance of the SIN signal detection coil 10 and the COS signal detection coil 20 can be improved, and the error performance can be improved.

  In this embodiment, for each of the SIN signal detection coil 10 and the COS signal detection coil 20, the connection lines 15 (15a to 15e) and 25 (25a to 25e) are a series of arcuate coils 10A to 10D and 20A to 20D. Since they are arranged so as to overlap each other, electromagnetic waves are externally applied to the series of arc-shaped coils 10A to 10D and 20A to 20D arranged below the connection lines 15 (15a to 15e) and 25 (25a to 25e). Noise is less likely to enter. Further, since the second end connection lines 15e and 25e as the folded connection lines and the other connection lines 15a to 15d and 25a to 25d are arranged so as to overlap vertically, the second end connection lines 15e and 25e and other The area between the connection lines 15a to 15d and 25a to 25d becomes substantially zero. For this reason, it is possible to make the connection lines 15a to 15e and 25a to 25e less susceptible to external electromagnetic noise.

  In this embodiment, since the connecting wires 15 (15a to 15e) and 25 (25a to 25e) are arranged at the center portions in the radial direction of the arcuate coils 10A to 10D and 20A to 20D, the arcuate coils 10A to 10D are arranged. , 20A to 20D, even if the positions of the connecting lines 15a to 15e and 25a to 25e are slightly shifted, the magnetic flux change rates of the respective arcuate coils 10A to 10D and 20A to 20D are small. For this reason, it is possible to reduce the influence of signal wraparound from the arcuate coils 10A to 10D and 20A to 20D to the connection lines 15 (15a to 15e) and 25 (25a to 25e). The detection accuracy of each signal of the COS signal detection coil 20 can be improved.

  In this embodiment, the connection line 15 f of the SIN signal detection coil 10 does not intersect the connection lines 25 a to 25 e of the COS signal detection coil 20, and the connection line 25 f of the COS signal detection coil 20 is connected to the SIN signal detection coil 10. No longer intersects with the lines 15a-15e. For this reason, it is possible to prevent the signal from wrapping between the SIN signal detection coil 10 and the COS signal detection coil 20, and to improve the detection accuracy of the signals of the SIN signal detection coil 10 and the COS signal detection coil 20. it can.

  In addition, according to the angle sensor 9 of this embodiment, each of the arc-shaped coils 10A to 10D connected in series via the connection lines 15a to 15f with respect to the SIN signal detection coil 10 of the sensor stator 7 A symmetric shape is formed around the symmetry axis L1 extending in the radial direction at the center position in the circumferential direction. Further, one end 10b and the other end 10c of each of the arcuate coils 10A to 10D connected to the connection lines 15a to 15f are disposed on the symmetry axis L1. Therefore, the symmetry of the shape of each of the arcuate coils 10A to 10D is improved with respect to the current flowing in and out of the arcuate coils 10A to 10D. For this reason, the magnetic flux density can be equalized for each of the arcuate coils 10A to 10D, the detection accuracy of the SIN signal detection coil 10 can be improved, and the detection accuracy and performance of the angle sensor 9 can be improved. Can be improved. This effect is the same for the COS signal detection coil 20.

  According to this embodiment, in order to make the arrangement of the coil wire group 100 constituting each of the arcuate coils 10A to 10D symmetrical about the symmetry axis L1, one end 10b and the other end 10c of each arcuate coil 10A to 10D. Since the arrangement of the coil wire group 100 is displaced in the radial direction by the displacement portion 100a, the symmetry of the arrangement of the coil wire group 100 is improved. Therefore, the magnetic flux density of each of the arcuate coils 10A to 10D can be further equalized, the detection accuracy of the SIN signal detection coil 10 can be further improved, and the detection accuracy and performance of the angle sensor 9 can be improved. Further improvement can be achieved. This effect is the same for the COS signal detection coil 20.

  According to the angle sensor 9 of this embodiment, the sensor stator 7 and the sensor rotor 8 are provided, and the sensor stator 7 includes the stator substrate 1, the first insulating layer 2, the first coil layer 3, the second insulating layer 4, the first 2 coil layer 5, third insulating layer 6, first connection line layer 11, fourth insulation layer 12, second connection line layer 13, and overcoat 14. Here, the SIN signal detection coil 10 and the COS signal detection coil 20 are configured by the first coil layer 3 and the second coil layer 5 formed with the second insulating layer 4 interposed therebetween. And each arc-shaped coil 10A-10D which comprises the SIN signal detection coil 10 is formed by connecting the coil wire divided | segmented into 2 in the circumferential direction and divided into 2 in the radial direction. That is, in each of the arcuate coils 10A to 10D, the SIN first coils 11A to 11D and the SIN second coils 12A to 12D are disposed on the outer peripheral side, and the SIN third coils 13A to 13D and the SIN fourth coil 14A are disposed on the inner peripheral side. ~ 14D are arranged. Further, the SIN first coils 11A to 11D and the SIN third coils 13A to 13D are arranged to face each other in the circumferential direction, and the SIN second coils 12A to 12D and the SIN fourth coils 14A to 14D are opposed to each other in the circumferential direction. Arranged. Further, the SIN first coils 11A to 11D and the SIN fourth coils 14A to 14D are arranged in the first coil layer 3, and the SIN second coils 12A to 12D and the SIN third coils 13A to 13D are arranged in the second coil layer 5. Is done. Therefore, even if the stator substrate 1 is deformed in a wavy shape in the circumferential direction, the SIN first coils 11A to 11D (SIN fourth coils 14A to 14D) and the SIN second coils 21A to 21D ( SIN third coils 13 </ b> A to 13 </ b> D) cancel out errors caused by the wavy deformation. In this sense, it is possible to realize a highly accurate angle sensor 9 with little detection error. This effect is the same for the COS signal detection coil 20.

  In this embodiment, a set of SIN first coils 11A to 11D and SIN third coils 13A to 13D and a set of COS second coils 22A to 22D and COS fourth coils 24A to 24D are respectively arranged in the circumferential direction. At the same position, the set of the SIN second coils 12A to 12D and the SIN fourth coils 14A to 14D and the set of the COS first coils 21A to 21D and the third coils 23A to 23D are the same in the circumferential direction. In position. Therefore, the positional relationship between the SIN signal detection coil 10 and the COS signal detection coil 20 can be always constant with respect to the excitation coil 40.

  In this embodiment, the SIN first coils 11 </ b> A to 11 </ b> D and the SIN second coils 12 </ b> A to 12 </ b> D are connected through a through hole 4 a formed in the second insulating layer 4. The SIN second coils 12 </ b> A to 12 </ b> D and the SIN fourth coils 14 </ b> A to 14 </ b> D are connected through a through hole 4 a formed in the second insulating layer 4. The SIN fourth coils 14 </ b> A to 14 </ b> D and the SIN third coils 13 </ b> A to 13 </ b> D are in contact with each other through a through hole 4 a formed in the second insulating layer 4. Furthermore, the SIN third coils 13 </ b> A to 13 </ b> D and the SIN first coils 11 </ b> A to 11 </ b> D are connected through a through hole 4 a formed in the second insulating layer 4. Similarly, the COS first coils 21 </ b> A to 21 </ b> D and the COS second coils 22 </ b> A to 22 </ b> D are connected through a through hole 4 a formed in the second insulating layer 4. Further, the COS second coils 22 </ b> A to 22 </ b> D and the COS fourth coils 24 </ b> A to 24 </ b> D are connected through a through hole 4 a formed in the second insulating layer 4. Further, the COS fourth coils 24 </ b> A to 24 </ b> D and the COS third coils 23 </ b> A to 23 </ b> D are connected through a through hole 4 a formed in the second insulating layer 4. Further, the COS third coils 23 </ b> A to 23 </ b> D and the COS first coils 21 </ b> A to 21 </ b> D are connected through a through hole 4 a formed in the second insulating layer 4. Thereby, the SIN signal detection coil 10 and the COS signal detection coil 20 can be manufactured easily and with high positional accuracy. Here, a gap (unevenness) is formed in the stator substrate 1 by deformation in the circumferential direction, and the magnetic flux density received by the SIN signal detection coil 10 and the COS signal detection coil 20 may be partially different. Even in this case, the SIN signal detection coil 10 (SIN first coils 11A to 11D, SIN second coils 12A to 12D, SIN third coils 13A to 13D, SIN fourth coils 14A to 14D) as a whole is reliably and error-free. It can be accurately offset.

  In this embodiment, the first coil layer 3 and the second coil layer 5 are formed by drawing conductive ink on the insulating layers 2 and 4 and then firing. Therefore, even if a deviation occurs in the first coil layer 3 and the second coil layer 5 by firing, the resistance values of the SIN signal detection coil 10 and the COS signal detection coil 20 are averaged by the above configuration, The resistance values can be offset from each other, and a decrease in detection accuracy can be reduced.

  In this embodiment, the SIN signal detection coil 10 and the COS signal detection coil 20 having different phases constitute one detection coil. For this reason, a constant induced voltage can be generated with respect to a predetermined magnetic field, and a highly accurate angle sensor 9 can be obtained.

  In addition, this invention is not limited to the said embodiment, A part of structure can also be changed suitably and implemented in the range which does not deviate from the meaning of invention.

  For example, in the embodiment described above, the connecting wire 15f is formed such that the arc-shaped coils 10A to 10D of the SIN signal detection coil 10 are externally wound and the other end 10c (10a) extends radially outward of the arc-shaped coils 10A to 10D. To the second end connection line 15e, the arc-shaped coils 20A to 20D of the COS signal detection coil 20 are internally wound, and the other end 20c (20a) extends radially inward of the arc-shaped coils 20A to 20D. It was configured to be connected to the second end connection line 25e via the crossover connection line 25f. On the other hand, the arc-shaped coils 10A to 10D of the SIN signal detection coil 10 are internally wound, and the other end 10c (10a) is connected to the arc-shaped coils 10A to 10D via a connecting line 15f extending radially inward. A connecting line connected to the two-end connecting line 15e, the arc-shaped coils 20A to 20D of the COS signal detection coil 20 are wound externally, and the other end 20c (20a) extends radially outward of the arc-shaped coils 20A to 20D. It can also be configured to connect to the second end connection line 25e via 25f.

  In the embodiment, the SIN first coils 11A to 11D and the SIN fourth coils 14A to 14D are formed in the first coil layer 3, and the SIN second coils 12A to 12D and the SIN third coils 13A to 13D are second. The coil layer 5 was formed. On the other hand, the SIN first coils 11A to 11D and the SIN fourth coils 14A to 14D are formed in the second coil layer 5, and the SIN second coils 12A to 12D and the SIN third coils 13A to 13D are the first coil. The layer 3 may be formed.

  In the embodiment, the COS first coils 23A to 23D and the COS fourth coils 24A to 24D are formed in the first coil layer 3, and the COS second coils 22A to 22D and the COS third coils 23A to 23D are the second. The coil layer 5 was formed. In contrast, the COS first coils 21A to 21D and the COS fourth coils 24A to 24D are formed in the second coil layer 5, and the COS second coils 22A to 22D and the COS third coils 23A to 23D are formed to the first coil. The layer 3 may be formed.

  In the above embodiment, the angle sensor 9 with one excitation and two outputs has been described. However, the present invention can also be applied to an angle sensor with two excitations and one output.

  The present invention can be used to detect a rotation angle of a rotation shaft of a motor, an engine, or the like.

DESCRIPTION OF SYMBOLS 1 Stator board | substrate 7 Sensor stator 8 Sensor rotor 9 Angle sensor 10 SIN signal detection coil 10A Reverse arc-shaped coil 10B Forward arc-shaped coil 10C Reverse arc-shaped coil 10D Forward arc-shaped coil 10a One end (folding point)
10b one end 10c other end 15 connection line 15a intermediate connection line (other connection lines)
15b Intermediate connection line (other connection lines)
15c Intermediate connection line (other connection lines)
15d First end connection line (other connection lines)
15e Second end connection line (folded connection line)
15f Crossover connection line 16 Positive terminal 17 Negative terminal 20 COS signal detection coil 20A Reverse arc coil 20B Forward arc coil 20C Reverse arc coil 20D Forward arc coil 20a One end (turning point)
20b one end 20c other end 25 connection line 25a intermediate connection line (other connection lines)
25b Intermediate connection line (other connection lines)
25c Intermediate connection line (other connection lines)
25d First end connection line (other connection lines)
25e Second end connection line (folded connection line)
25f Crossover connection line 26 Positive terminal 27 Negative terminal 62a Arc coil (planar coil)
62b Arc coil (planar coil)
62c Arc-shaped coil (planar coil)
62d Arc-shaped coil (planar coil)
64a Arc coil (planar coil)
64b Arc-shaped coil (planar coil)
64c Arc-shaped coil (planar coil)
64d arc coil (planar coil)
75 Motor shaft (rotating shaft)

Claims (3)

A sensor rotor attached to a rotating shaft and having a planar coil formed on the surface;
An angle sensor comprising: a sensor stator having a surface disposed opposite to the surface of the sensor rotor and having a planar coil formed on the surface;
The sensor stator is alternately arranged in a circumferential direction on the stator substrate and the stator substrate, and is electrically wound so as to be in reverse phase with respect to the forward planar coil wound in a spiral shape and the forward planar coil. A reverse planar coil wound in a spiral shape, and a positive electrode terminal and a negative electrode terminal arranged adjacent to each other and provided so as to be connectable to an external device,
The forward planar coil and the backward planar coil are connected in series via a connection line, and one end of both ends of the series of planar coils connected in series is connected to the positive terminal via a connection line. Connected, the other end is connected to the negative terminal via a connection line,
The connection line is arranged in a range of less than one turn along the arrangement of the series of planar coils connected in series, and one wire connected to one end of the series of planar coils as a turning point The connection line is arranged so as to overlap vertically with respect to the other connection lines as a folded connection line,
An angle sensor characterized in that a connecting line arranged so as to overlap vertically is arranged so as to overlap vertically with the series of planar coils connected in series.   2. The angle sensor according to claim 1, wherein the connection lines arranged so as to overlap vertically are arranged so as to pass through a central portion in a radial direction of the series of planar coils connected in series. The sensor stator includes a SIN signal detection coil and a COS signal detection coil arranged as a series of planar coils connected in series via the connection line, with the phases shifted from each other by a predetermined angle,
Of the SIN signal detection coil and the COS signal detection coil, one end of each of the planar coils is disposed at a spiral center, and the other end is disposed on the radially outer side of each of the planar coils. The other end is disposed at a central position in the circumferential direction of each planar coil, and the one end of each planar coil is connected to the connection line at the radial center of each planar coil. An end is connected to the connection line via a cross connection line extending radially outward of each planar coil,
Of the SIN signal detection coil and the COS signal detection coil, one end of each of the other planar coils is disposed at the spiral center, and the other end is disposed radially inward of each of the planar coils. The other end is disposed at a central position in the circumferential direction of each planar coil, and the one end of each planar coil is connected to the connection line at the radial center of each planar coil. The angle sensor according to claim 2, wherein an end is connected to the connection line via a cross connection line extending inward in the radial direction of each planar coil.

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