JP2010043908A - Angle detection device and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an angle detection device and its manufacturing method, capable of reducing cost by reducing the number of components, improving the reliability, and further, improving the detection accuracy. <P>SOLUTION: This device includes a stator having first and second salient pole part groups, formed on the inner peripheral side of a ring flat plate which is a magnetic material and erected by being bent, and provided with a winding member for excitation and detection, by using each salient pole part constituting the first and second salient pole part groups as a winding magnetic core; and first and second rotors comprising a magnetic material and provided rotatably, with respect to the stator so that a gap permeance between each salient pole part constituting the first and second salient pole part groups is changed by rotation about the rotating shaft. The stator includes a magnetic interference degree reduction means for reducing a magnetic interference degree between a magnetic circuit formed of the first salient pole part group and the first rotor, and a magnetic circuit formed of the second salient pole part group and the second rotor. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an angle detection device and a manufacturing method thereof.

  Conventionally, this type of resolver has a stator and a rotor, and utilizes the fact that the mutual inductance between the stator and the rotor varies depending on the rotational position of the rotor with respect to the stator, and outputs according to the rotational angle of the rotor with respect to the stator. Output a signal.

  FIG. 29 is a diagram for explaining a conventional resolver. FIG. 29A is a diagram showing a structure of a conventional resolver, and FIG. 29B is a diagram shown for explaining a winding structure in each slot of the conventional resolver.

  As shown in FIG. 29A, the conventional resolver 10 includes a one-phase excitation winding 14 and a two-phase detection winding (a SIN detection winding 16 and a COS detection winding 17 (FIG. 29A). (Not shown)) is a variable reluctance resolver including a stator 11 wound around a salient pole 13 and a rotor 15 provided to be rotatable with respect to the stator 11. The rotor 15 is an eccentric rotor that is an iron core only and does not have a winding. The gap permeance between the rotor 15 and the stator 11 changes in a sine wave shape with respect to the rotation angle θ. For this reason, according to the conventional resolver 10, as shown in FIG. 29B, the rotation angle can be detected with high accuracy by measuring the gap permeance described above.

  In the conventional resolver 10, two-phase detection windings (SIN detection winding 16 and COS detection winding 17) are sequentially wound in each slot with one slot pitch (without slot skipping). (Not shown in FIG. 29 (a)), and further, as shown in FIG. 29 (b), distributed winding is performed so that each of the induced voltage distributions is a sine wave distribution. (The number of turns (amount) of the windings is also a sinusoidal distribution).

  For this reason, according to the conventional resolver 10, the detection accuracy of the rotation angle can be improved by reducing the high-frequency order from the low order to the high order included in the output voltage.

  However, since the conventional resolver 10 has the structure shown in FIG. 29 (a), it is difficult to wind the excitation winding and the detection winding around the salient pole. It becomes complicated. Therefore, in Patent Document 1 and Patent Document 2, for example, an excitation winding and a detection winding are provided on a bobbin provided on the stator side, or an excitation winding and a detection winding are printed on a multilayer printed board on the stator side. On the other hand, an angle detection device is disclosed in which salient poles and rotors are formed of metal plates or the like.

JP 2000-292119 A JP 2000-292120 A

  However, the angle detection devices disclosed in Patent Literature 1 and Patent Literature 2 have a problem that the number of parts is large, and it is difficult to reduce the manufacturing cost and improve the reliability of the angle detection device. In addition, in the angle detection devices disclosed in Patent Document 1 and Patent Document 2, protrusions are present on the inner diameter side of the stator, for example, by cutting and raising the yoke of the stator, thereby improving the magnetic efficiency between the stators. It was difficult to improve the detection accuracy.

  Furthermore, in the angle detection devices disclosed in Patent Document 1 and Patent Document 2, generally, a relative angle can be detected, and in order to perform highly accurate absolute angle detection, it is used in combination with other absolute angle detection means. There was a need to do. For this reason, in the angle detection device described above, fine adjustment for determining the position of the zero point is necessary, or the angle detection accuracy is lowered.

  The present invention has been made in view of the technical problems as described above, and one of its purposes is to reduce the number of parts to reduce cost and improve reliability, and to further improve detection accuracy. An object of the present invention is to provide an angle detection device that can be improved and a method for manufacturing the same.

  In order to solve the above-described problems, the present invention provides a first salient pole group formed on the inner peripheral side of an annular flat plate, which is a magnetic material, and caused by bending, and the bending formed on the outer peripheral side of the flat plate. A second salient pole part group raised by the first and second salient pole part groups, with each salient pole part constituting the first and second salient pole part groups as a winding core, and a winding member for excitation and a detection The gap permeance changes between the stator provided with the winding member and the inner peripheral surface of each salient pole part which is made of a magnetic material and which forms the first salient pole part group by rotation around the rotation axis. A first rotor rotatably provided to the stator and a magnetic material, on the outer peripheral side of each salient pole part constituting the second salient pole part group by rotation around the rotation axis Rotating relative to the stator so that the gap permeance with the surface changes A magnetic circuit formed by the first salient pole portion group and the first rotor, the second salient pole portion group, and the second rotor. The present invention relates to an angle detection device including magnetic interference reduction means for reducing the magnetic interference between the rotor and the magnetic circuit formed by the rotor.

  In the present invention, the first and second salient pole part groups are raised by bending a stator having first and second salient pole part groups formed on the inner and outer peripheral sides of the annular flat plate. . Then, the rotation around the rotation axis allows rotation relative to the stator so that the gap permeance between the inner peripheral surface of the first salient pole group and the outer peripheral surface of the first rotor changes. In addition to providing the first rotor, the gap permeance between the outer peripheral surface of the second salient pole group and the inner peripheral surface of the second rotor is changed by rotation around the rotation axis. A second rotor is provided so as to be rotatable. As a result, it is possible to provide an angle detection device that can greatly improve the detection accuracy, significantly reduce the number of components, and reduce costs and improve reliability.

  In the angle detection device according to the present invention, the magnetic interference degree reducing means may be a nonmagnetic material formed so as to separate the inner peripheral side and the outer peripheral side of the flat plate.

  According to the present invention, between the magnetic circuit formed by the first salient pole part group and the first rotor, and the magnetic circuit formed by the second salient pole part group and the second rotor. The degree of magnetic interference can be reduced to an almost negligible level, and the angle detection accuracy can be further improved.

  Further, in the angle detection device according to the present invention, the magnetic interference reduction means has a plurality of lobe-shaped hollows formed in the circumferential direction of the flat plate so as to separate the inner peripheral side and the outer peripheral side of the flat plate. Part.

  According to the present invention, since the magnetic interference reduction means can be realized by, for example, press working, the cost of the angle detection device can be further reduced without significantly reducing the detection accuracy.

  In the angle detection device according to the present invention, one of the first and second rotors may be a rotor having an axial multiplication angle of “1”.

  According to the present invention, since an absolute angle can be detected, an angle detection device with further improved detection accuracy can be provided.

  In the angle detection device according to the present invention, the tip shape of each salient pole part constituting at least one salient pole part group of the first and second salient pole part groups has a T-shape, The excitation winding member and the detection winding member may be provided around a support portion that supports the tip of the salient pole portion.

  According to the present invention, by making the tip shape of the salient pole portion provided with the winding member a T-shaped shape, it is possible to reduce the variation in magnetic efficiency with respect to the thrust direction deviation of the rotor. Thereby, the influence of the magnetic flux change in the vicinity of the winding member can be reduced, and the detection accuracy of the rotation angle of the rotor relative to the stator can be improved. In addition, by adopting a T-shaped shape as the tip shape of the salient pole part, even when the number of salient pole parts is increased, it is possible to suppress a decrease in magnetic flux passing through the winding core, resulting in a decrease in detection accuracy. Can be suppressed.

  In the angle detection device according to the present invention, the material of the stator may be SPCC which is ordinary steel or S10C which is carbon steel for machine structure.

  According to the present invention, by using SPCC and S10C, which are easy to maintain processing accuracy and reliability by bending, as a stator material, a stator is prepared with an inexpensive material, and a low-cost and highly reliable angle detection device is provided. Can be provided.

  In the angle detection device according to the present invention, a zero point detection unit that detects a zero point based on a detection signal from the winding member according to one rotation angle of the first and second rotors with respect to the stator; And a relative angle detector that detects a relative angle based on a detection signal from the winding member corresponding to the other rotation angle of the first and second rotors with respect to the stator.

  According to the present invention, it is possible to provide an angle detection device capable of reducing the cost and improving the reliability, further improving the detection accuracy, and performing highly accurate control according to the rotation angle of the rotor.

  The present invention also includes a first salient pole part group formed on the inner peripheral side of a stator made of an annular flat plate made of a magnetic material and a second salient pole part group formed on the outer peripheral side of the flat plate. A bending step of bending the plate so as to occur with respect to the flat plate surface, and each salient pole part constituting the first and second salient pole part groups as winding cores, and exciting windings on each salient pole part Winding member attaching step for winding the member and the detecting winding member, and an inner peripheral surface of each salient pole portion that is made of a magnetic material and constitutes the first salient pole portion group by rotation around the rotation axis A first rotor that is rotatable relative to the stator so that a gap permeance between the first and second stators changes, and each salient pole part that is made of a magnetic material and constitutes the second salient pole part group by rotation around a rotation axis Rotate relative to the stator so that the gap permeance with the outer peripheral surface of the stator changes. A rotor attachment step of attaching a second rotor that is possible, the magnetic circuit formed by the first salient pole part group and the first rotor, and the second salient pole part The present invention relates to a method of manufacturing an angle detection device including a magnetic interference degree reducing unit that reduces a magnetic interference degree between a group and a magnetic circuit formed by the second rotor.

  Moreover, in the manufacturing method of the angle detection apparatus according to the present invention, the magnetic interference degree reducing means may be a nonmagnetic material formed so as to separate the inner peripheral side and the outer peripheral side of the flat plate.

  In the angle detection device manufacturing method according to the present invention, the magnetic interference reduction means includes a plurality of lobes formed in the circumferential direction of the flat plate so as to separate the inner peripheral side and the outer peripheral side of the flat plate. The hollow part of a shape may be sufficient.

  Moreover, in the manufacturing method of the angle detection apparatus according to the present invention, one of the first and second rotors may be a rotor having an axial multiplication angle of “1”.

  Moreover, in the manufacturing method of the angle detection device according to the present invention, the tip shape of each salient pole part constituting at least one salient pole part group of the first and second salient pole part groups has a T-shape. The excitation winding member and the detection winding member may be provided around a support portion that supports the tip of each salient pole portion.

  Moreover, in the manufacturing method of the angle detection apparatus which concerns on this invention, the material of the said stator may be SP10 which is ordinary steel, or S10C which is carbon steel for machine structures.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. Also, not all of the configurations described below are essential constituent requirements of the present invention.

  Hereinafter, a resolver will be described as an example of the angle detection device according to the present invention, but the present invention is not limited to the resolver.

[Embodiment 1]
FIG. 1 is a perspective view of a configuration example of a resolver according to the first embodiment of the present invention. In FIG. 1, illustration of wiring is omitted. In FIG. 1, an example is provided with a one-phase excitation two-phase output type resolver having 24 salient poles on the outside and a one-phase excitation two-phase output type resolver having ten salient poles on the inside. However, the present invention is not limited to this.

  In the resolver 100 according to the first embodiment, a so-called outer stator type / inner rotor type angle detection device provided inside and a so-called inner stator type / outer rotor type angle detection device provided outside are integrated. It has the structure which was made. Here, the edge (circumferential portion) constituting the inner diameter of the annular body (rotor or stator) in plan view is the inner peripheral side (the inner diameter side, the side closer to the annular central portion), and the outer diameter of the annular body is configured. If the edge portion (circumferential portion) to be operated is the outer peripheral side (the outer diameter side, the side far from the annular central portion), in the outer stator type / inner rotor type angle detection device, the annular stator on the outer peripheral side of the annular rotor A magnetic path is formed with the salient pole portion of the stator, and the inner peripheral surface (inner peripheral surface) of the salient pole portion of the stator faces the outer peripheral surface (outer peripheral surface) of the rotor. The signal from the detection winding provided in the stator changes according to the angle. In the angle detection device of the inner stator type / outer rotor type, a magnetic path is formed between the salient pole portion of the annular stator on the inner circumference side of the annular rotor and the outer circumference side of the salient pole portion of the stator. The surface faces the inner peripheral surface of the rotor, and the signal from the detection winding provided on the stator changes according to the rotation angle of the rotor. In addition, the outer stator type / inner rotor type angle detection device and the inner stator type / outer rotor type angle detection device are in a state where they are completely magnetically shielded from each other, or in a state in which magnetic influences can be ignored. It has become.

The resolver 100 according to the first embodiment includes a stator (stator) 200 and first and second rotors (rotors) 300 and 400. The stator 200 is provided so as to protrude on the inner peripheral side (the side closer to the center of the annular flat plate) of the ring-shaped flat plate, which is a magnetic material, and then has ten protrusions raised with respect to the flat plate surface. It was raised with respect to the flat plate surface after being provided projecting to the pole portions 210 _{1 to} 210 ₁₀ (first salient pole portion group) and the outer peripheral side of the flat plate (the side far from the center of the annular flat plate) 24 salient pole parts 240 ₁ to 240 ₂₄ (second salient pole part group). The salient pole portions 210 _{1 to} 210 ₁₀ are formed on the inner edge (inner diameter side) of the annular flat plate, and the inner peripheral surface of each salient pole portion facing the rotor 300 is not a flat surface but the center of the annular flat plate. A part of an arc centering on the part is formed. The salient pole portions 240 ₁ to 240 ₂₄ are formed on the outer edge (outer diameter side) of the annular flat plate, and the outer peripheral surface of each salient pole portion facing the rotor 400 is not a flat surface but the center of the annular flat plate. A part of an arc centering on the part is formed.

Each salient pole portion is provided with a winding member for excitation and a winding member for detection as winding cores. That is, the salient pole portions 210 _1, as the winding magnetic core, the winding member 220 ₁ for excitation and detection are mounted on the salient pole portion 210 _2, which works as the winding magnetic core, for excitation and detection of the winding member 220 ₂ are mounted on the salient pole portion 210 _3, which works as the winding magnetic core, excitation and winding member 220 ₃ for detection mounted on the salient pole portion 210 _4, Makisen磁as the core excitation and winding member 220 ₄ for detection are mounted on the salient pole portion 210 _5, which works as the winding magnetic core, the winding member 220 ₅ for excitation and detection are provided. Similarly, on the salient pole portion 210 _6, as the winding magnetic core, the winding member 220 ₆ for excitation and detection are mounted on the salient pole portion 210 _7, which works as the winding magnetic core, excitation and detection winding member 220 ₇ is provided for use on the salient pole portion 210 _8, as the winding magnetic core, the winding member 220 ₈ for excitation and detection are mounted on the salient pole portion 210 _9, winding as the magnetic core, the winding member 220 ₉ for excitation and detection are mounted on the salient pole portion _{210 10,} as the winding magnetic core, the winding member _{220 10} for excitation and detection are provided.

Similarly, each of the salient pole portions ₂₄₀ 1 to 240 _24, which works as the winding magnetic core, each winding member ₂₅₀ 1-250 ₂₄ for excitation and detection are provided.

Salient pole portions ₂₁₀ 1 _{to 210 10,} 240 1 to 240 ₂₄ with the stator 200, after being pre-formed over a flat plate, bent by pressing (broadly bending), so as to be substantially perpendicular to the flat plane Has been awakened.

In addition, a nonmagnetic material is formed on the stator 200 in the circumferential direction of the flat plate as the magnetic interference reduction means 500 for reducing the magnetic interference between the inner peripheral side and the outer peripheral side of the flat plate. As this nonmagnetic material, for example, aluminum can be employed. By providing the magnetic interference degree reducing means 500, a magnetic circuit formed by using the salient pole portions 210 _{1 to} 210 ₁₀ as constituent elements by the rotation of the rotor 300, and the salient pole portion by the rotation of the rotor 400. and it is capable of almost eliminating the magnetic influence between the magnetic circuit formed of the salient pole portions 240 ₁ to 240 ₂₄ as a component.

The rotor 300 is made of a magnetic material and is provided so as to be rotatable with respect to the stator 200. More specifically, in the rotor 300, the gap permeance between the salient pole portions 210 _{1 to} 210 ₁₀ of the stator 200 and the inner peripheral surface changes due to the rotation of the rotor 300 about the rotation axis. Thus, it is provided to be rotatable with respect to the stator 200. In the first embodiment, it is assumed that the axial multiplication angle of the rotor 300 is “6”. That is, in the top view, the diameter of the outer contour line on the outer peripheral side of the rotor 300 changes in six cycles.

The rotor 400 is made of a magnetic material and is provided so as to be rotatable with respect to the stator 200. More specifically, the rotor 400 is to change the gap permeance between the outer side surface of each salient pole portion of the salient pole portions 240 ₁ to 240 ₂₄ of the stator 200 by the rotation of the rotary axis of the rotor 400 Are provided so as to be rotatable with respect to the stator 200. In the first embodiment, it is assumed that the shaft multiple angle of the rotor 400 is “1”. In the first embodiment, it is assumed that the rotor 400 is an eccentric rotor. By using an eccentric rotor, a signal with less harmonic components can be taken out, so that the angle detection accuracy can be improved.

  Here, the exciting and detecting winding members for extracting the detection signals output from the detection windings by the rotation of the rotors 300 and 400 will be described.

  FIG. 2 is an explanatory diagram of a winding member for excitation provided at the salient pole portion of the stator 200. 2 is a plan view of the stator 200 viewed in the direction of the rotation axis of the rotor 300 or the rotor 400 of FIG. 1, and the same parts as those in FIG. In FIG. 2, the rotors 300 and 400 are not shown. In FIG. 2, the winding direction of the excitation winding as the winding member for excitation is schematically shown.

As shown in FIG. 2, the salient pole portions 210 _{1 to} 210 ₁₀ are provided with exciting winding members such that the winding directions of the winding members provided on the adjacent salient pole portions are opposite to each other. It is done. An excitation signal is given between the windings R _1i and R _2i constituting the exciting winding member. Furthermore, the salient pole portions 240 ₁ to 240 _24, the winding member for excitation is provided as the winding direction of the winding member provided adjacent salient pole portions become opposite to each other. An excitation signal is given between the windings R _1o and R _2o constituting the winding member for excitation. The winding member for excitation provided in each salient pole part can be a coil winding, for example.

FIG. 3 is an explanatory diagram of a winding member for detection provided in the salient pole portions 210 _{1 to} 210 ₁₀ of the stator 200. 3 is a plan view of the stator 200 viewed in the direction of the rotation axis of the rotor 300 or the rotor 400 of FIG. 1, and the same parts as those in FIG. In FIG. 3, the rotors 300 and 400 are not shown. FIG. 3 schematically shows the winding direction of the excitation winding as the detection winding member.

In order to obtain a two-phase detection signal by the rotation of each rotor, the detection winding members are each composed of two sets of winding members. Therefore, as shown in FIG. 3, the winding member for detection for obtaining the detection signal of the first phase (for example, SIN phase) of the two-phase detection signals provided in the salient pole portions 210 _{1 to} 210 ₁₀ is, for example, from the salient pole portion 210 ₁ to the salient pole portion 210 ₉ counterclockwise, wound around each salient pole portion every other one. On the other hand, the winding member for detection for obtaining a detection signal of the second phase of the two-phase detection signals (e.g., COS phase), for example, from the salient pole portion 210 ₁₀ to the salient pole portion 210 ₈ counterclockwise, 1 Every other winding is wound around each salient pole. The detection signal of the first phase is detected as a signal between the windings S _1i and S _3i , and the detection signal of the second phase is detected as a signal between the windings S _2i and S _4i . The winding member for detection provided in each salient pole portion can be, for example, a coil winding.

Figure 4 represents an illustration of the winding member for detection which is mounted on salient pole portions ₂₄₀ 1 to 240 ₂₄ of the stator 200. FIG. 4 is a plan view of the stator 200 viewed in the direction of the rotation axis of the rotor 300 or the rotor 400 of FIG. 1, and the same parts as those in FIG. In FIG. 4, the illustration of the rotors 300 and 400 is omitted. FIG. 4 schematically shows the winding direction of the excitation winding as the detection winding member.

As shown in FIG. 4, in order to obtain a two-phase detection signals provided salient pole portions 240 ₁ to 240 _24, the winding member for detection is composed of two pairs of windings member. Winding member for detection for obtaining a detection signal of the first phase of the two-phase detection signals (e.g., SIN phase), for example, from the salient pole portion 240 ₁ to the salient pole portion 240 ₂₃ counterclockwise, every Is wound around each salient pole part. On the other hand, the detection winding member for obtaining the detection signal of the second phase (for example, the COS phase) of the two-phase detection signals is, for example, from the salient pole part 240 ₂₄ to the salient pole part 240 ₂₂ counterclockwise. Every other winding is wound around each salient pole. The first phase detection signal is detected as a signal between the windings S _1o and S _3o , and the second phase detection signal is detected as a signal between the windings S _2o and S _4o . The winding member for detection provided in each salient pole portion can be, for example, a coil winding.

  In the first embodiment, the winding direction of the exciting winding member is not limited to the direction shown in FIG. In the first embodiment, the winding direction of the winding member for detection is not limited to the directions shown in FIGS.

  In the resolver 100 having the above configuration, the following magnetic circuit is formed by the rotation of the rotors 300 and 400 with respect to the stator 200.

  FIG. 5 is an explanatory diagram of a magnetic circuit formed in the resolver 100 of FIG. FIG. 5 is a plan view of the resolver 100 viewed in the direction of the rotation axis of the rotor 300 or the rotor 400 of FIG. 1. The same parts as those in FIG.

  FIG. 5 schematically shows the direction of the magnetic flux at a certain time when the rotors 300 and 400 are rotating with respect to the stator 200. In FIG. 5, the direction of the magnetic flux passing through each salient pole as the winding core is schematically shown, and the direction of the magnetic flux between the salient poles is schematically shown.

Each salient pole part of the stator 200 is provided with a winding member, and when the rotor 300 rotates, a magnetic circuit is formed between the salient pole parts adjacent to each other via the rotor 300 in the salient pole parts 210 _{1 to} 210 ₁₀ . Is done. Similarly, when the rotor 400 is rotated, the salient pole portions ₂₄₀ 1 to 240 _24, a magnetic circuit is formed between the salient pole portion adjacent via rotor 400. In the first embodiment, as shown in FIG. 5, the winding member is provided in each salient pole portion so that the direction of the magnetic flux passing through the adjacent salient pole portions is opposite. As a result, due to the rotation of the rotors 300 and 400, the current generated in the winding member wound around each salient pole portion also changes according to the change in gap permeance between each salient pole portion. The current waveform generated in the wire member can be made sinusoidal.

  FIG. 6 illustrates an example of a waveform of a detection signal extracted from the winding member for detection of the resolver 100 according to the first embodiment. In FIG. 6, the horizontal axis represents angle, and the vertical axis represents amplitude.

6, the detection signal Eso is a signal between the windings S _1o and S _3o in FIG. 5, the detection signal Eco is a signal between the windings S _2o and S _{4o in} FIG. 5, and the detection signal Esi is the winding S in FIG. _1i, signal between _{S 3i,} detection signal Eci is a signal between the windings _{S 2i, S 4i} in Fig. For example, when the amplitude of the detection signal Eso is Y1 and the amplitude of the detection signal Eco is Y2, the absolute angle AA1 can be specified. Furthermore, when the amplitude of the detection signal Esi is y1 and the amplitude of the detection signal Eci is y2, the angle AA2 near the absolute angle AA1 can be specified with higher accuracy.

  In the resolver 100 having the above-described configuration, the material of the stator 200 made of a magnetic material is SPCC (one steel plate) that is ordinary steel or S10C (one piece of carbon steel for mechanical structure) rather than a laminated electromagnetic steel plate. Steel plate). SPCC (Steel Plate Cold Commercial) is a cold-rolled steel sheet and steel strip specified in JIS G3141. S10C is a carbon steel material for machine structure defined in JIS G 4051 and contains about 0.10% carbon.

  FIG. 7 is an explanatory diagram of the magnetization characteristics of the stator material. In FIG. 7, the horizontal axis represents the magnetic field strength (unit: H [A / m]), and the vertical axis represents the magnetic flux density (unit: B [T]).

  In the case of laminated electromagnetic steel sheets, steel sheets such as SPCC and S10C, when the magnetic field becomes stronger, the magnetic flux density is saturated above a certain magnetic field. However, while high magnetic flux density can be obtained with laminated electrical steel sheets (T1), SPCC and S10C are saturated with lower magnetic flux density (T2). That is, when the laminated electromagnetic steel sheet is adopted as the material of the stator 200, a higher magnetic flux density can be obtained. As a result, the detection level of the detection signal can be increased. Therefore, when SPCC or S10C is used as the material of the stator 200, the detection level of the detection signal is low because the magnetic flux density is low.

  However, the laminated electrical steel sheet is not only expensive as a material cost, but also has a property that it is difficult to bend by bending press processing, and it is difficult to maintain processing accuracy and reliability by bending. On the other hand, SPCC and S10C have the property of being inexpensive as a material cost, resistant to bending by bending press processing, and easily maintaining processing accuracy and reliability by bending. Therefore, by adopting SPCC or S10C as the material of the stator 200 and forming the salient pole as shown in FIG. 1 by bending, the stator 200 can be prepared with an inexpensive material. . Moreover, even if the detection level is low, the detection accuracy does not decrease. By amplifying the detection level of the detection signal, the cost of the resolver can be reduced without reducing the detection accuracy. .

  In the first embodiment, the tip shape of each salient pole portion has a T-shape, and an excitation winding member and a detection winding are provided around a support portion that supports the tip portion of each salient pole portion. Desirably, a member is provided.

FIG. 8 is an explanatory view schematically showing the shape of the salient pole part in the first embodiment. 8, the salient pole portions 210 ₁ provided in a flat surface of the annular shows a plan view of the tip portion, the salient pole portion ₂₁₀ 1-210 other of ₁₀ salient poles and the salient pole portions ₂₄₀ 1 to 240 ₂₄ The shape of the other salient poles is the same as in FIG.

The salient pole portion 210 ₁ has a tip end portion 212 ₁ and a support portion 214 _1, and the tip end shape of the salient pole portion 210 ₁ is formed in a T shape. Such tip 212 ₁ and the support portion 214 ₁ is raised surface of the flat sheet by bending. When raised surface of the flat sheet, (the rotational direction of the width of the rotor 300) rotor 300 facing the distal end portion 212 ₁ of the surface of the width W1, the rotor 300 facing the support part 214 ₁ of the face width (rotor 300 (rotational direction width) larger than W2. Winding member for detection shown in the wound member and 3 for excitation shown in FIG. 2 is provided as wound on the outside of the support portion 214 _1.

Similarly, for example, the salient pole portion 240 ₁ has a tip portion 242 ₁ and a support portion 244 ₁ (not shown), and the tip shape of the salient pole portion 240 ₁ is formed in a T-shape. ing. Such tip 242 ₁ and the support portion 244 ₁ is raised surface of the flat sheet by bending. When raised surface of the flat sheet, (the rotational direction of the width of the rotor 400) rotor 400 facing the distal end 242 ₁ of the surface of the width W3, the rotor 400 facing the support part 244 ₁ of the face width (rotor 400 (the width in the rotational direction) is greater than W4. Winding member for detection shown in the wound member and 4 for excitation shown in FIG. 2 is provided as wound on the outside of the support portion 244 _1.

  Thus, by making the tip shape of the salient pole portion provided with the winding member a T-shaped shape, it is possible to reduce the variation in magnetic efficiency with respect to the thrust direction deviation of the rotors 300 and 400. Thereby, the influence of the magnetic flux change in the vicinity of the winding member can be reduced, and the detection accuracy of the rotation angle of the rotors 300 and 400 with respect to the stator 200 can be improved. In addition, by adopting a T-shaped shape as the tip shape of the salient pole part, even when the number of salient pole parts is increased, it is possible to suppress a decrease in magnetic flux passing through the winding core, resulting in a decrease in detection accuracy. Can be suppressed.

  As described above, since the resolver 100 according to the first embodiment includes the stator 200, the rotors 300 and 400, and the winding member, the resolver has a complicated configuration with a large number of parts as in Patent Document 1 or Patent Document 2. As compared with the case of manufacturing, the number of parts can be greatly reduced, and the cost can be reduced and the reliability can be improved.

  Moreover, although it is a thin and flat type resolver, the absolute angle can be detected by making the rotor 400 an eccentric rotor, and the position of the zero point can be determined and the angle can be detected with high accuracy.

  Furthermore, as the material of the stator 200, an inexpensive magnetic material with high processing accuracy and reliability is adopted for the bending process, so that the cost of the resolver 100 can be reduced.

  FIG. 9 illustrates a top view of the stator 200 according to the first embodiment. 9, parts that are the same as the parts shown in FIG. 1 are given the same reference numerals, and explanation thereof will be omitted as appropriate.

  As shown in FIG. 9, the stator 200 in the first embodiment raises the salient pole portion with respect to the flat plate surface by bending press processing, so that the protrusion P <b> 1 does not exist on the inner diameter side of the stator 200. That is, the minimum inner diameter of the stator 200 after bending is the inner diameter d1 at each salient pole portion. More specifically, among the inner diameters of the stator 200, the inner diameter d <b> 1 at each salient pole part is smaller than the inner diameter d <b> 2 between two adjacent salient pole parts among the inner diameters of the stator 200. Thus, by forming the salient pole portion so that the projection on the inner diameter side of the stator 200 is not formed, the magnetic efficiency is improved by the magnetic circuit via the salient pole portion provided inside, and the transformation ratio of the resolver 100 is increased. Can be increased.

  Further, as shown in FIG. 9, the stator 200 according to the first embodiment raises the salient pole portion with respect to the flat plate surface by bending press processing, so that the protrusion P <b> 2 does not exist on the outer diameter side of the stator 200. That is, the maximum outer diameter of the stator 200 after bending is the outer diameter d10 at each salient pole portion. More specifically, out of the outer diameter of the stator 200, the outer diameter d <b> 10 at each salient pole portion is larger than the outer diameter d <b> 11 between two adjacent salient pole portions of the outer diameter of the stator 200. Thus, by forming the salient pole portion so that the outer diameter side projection of the stator 200 is not formed, the magnetic efficiency is improved by the magnetic circuit via the salient pole portion provided on the outer diameter side. The transformation ratio can be increased.

  As described above, according to the first embodiment, the cost can be reduced and the reliability can be improved and the transformation ratio can be increased without reducing the detection accuracy.

  FIG. 10 is a cross-sectional view taken along the line AB of FIG.

  The stator 200 made of a flat plate made of a magnetic material has a magnetic interference reduction means 500 that prevents the magnetic circuit formed on the inner diameter side and the magnetic circuit formed on the outer diameter side from affecting each other. For example, aluminum is formed. Thereby, magnetic shielding of both magnetic circuits is aimed at. As a result, the rotation angle can be detected independently from each other on the inner diameter side and the outer diameter side of one flat plate, and a thin and flat double-speed resolver can be provided.

  Next, a method for manufacturing the resolver 100 according to the first embodiment that has the above-described configuration and can achieve the above-described effects will be described.

FIG. 11 is a flowchart illustrating an example of a method for manufacturing the resolver 100 according to the first embodiment. For example, the resolver 100 manufacturing apparatus executes the process of each process according to the flow shown in FIG.
FIG. 12 is a perspective view of the stator 200 in the first embodiment before bending press processing. In FIG. 12, the same parts as those in FIG.
FIG. 13 is a perspective view of the stator 200 in the first embodiment after bending press processing. In FIG. 13, the same parts as those in FIG.
FIG. 14 is a perspective view of the stator 200 in the first embodiment after the winding member attaching step. In FIG. 14, the same parts as those in FIG. 1 or FIG.
FIG. 15 is an explanatory diagram of a rotor attachment process in the first embodiment.

The resolver 100 according to the first embodiment first processes the shape of the stator 200 in the stator shape processing step (step S10), and then bends the salient pole portions of the plate-shaped stator 200 in the bending press processing step (bending step). A plurality of salient pole portions are raised with respect to the flat plate surface (step S12). Then, winding a winding member mounting step, each salient pole portion of the awakened salient pole portions ₂₁₀ 1 _{to 210 10,} 240 1 to 240 ₂₄ in step S12 as a winding magnetic core, the outside of each salient pole portion A member is provided (step S14).

That is, in the stator shape processing step of step S10, in order to perform the bending press processing of step S12, as shown in FIG. 12, by using press processing, SPCC that is ordinary steel or S10C that is carbon steel for mechanical structure is used as a material. edge salient pole portions ₂₁₀ 1 to 210 ₁₀ in the inner diameter side of the flat plate made of a magnetic material ring and the salient pole portions ₂₄₀ 1 to 240 ₂₄ to the edges of the outer diameter side is provided, the shape of the stator 200 formed to Is done. The flat plate is formed with magnetic interference reduction means 500 made of a nonmagnetic material in the circumferential direction so as to separate the inner diameter side region and the outer diameter side region. Here, as described with reference to FIG. 8, the distal end shape of each salient pole portion of the salient pole portions ₂₁₀ 1 _{to 210 10,} 240 1 to 240 ₂₄ to have a T shape, the stator 200 is formed.

In step S12, as shown in FIG. 13, the stator 200 is processed by bending press processing so as to raise the plurality of salient pole portions formed in step S10. As a result, the salient pole portions 210 _{1 to} 210 ₁₀ and 240 ₁ to 240 ₂₄ are raised so as to be substantially perpendicular to the flat plate surface of the stator 200. As a result, the minimum inner diameter of the stator 200 after bending is the inner diameter of each salient pole part 210 _{1 to} 210 ₁₀ , and the maximum inner diameter of the stator 200 after bending is the salient pole part 240 ₁ to 240 ₂₄ . Stator 200 is formed to have an outer diameter at each salient pole portion. In FIG. 13, the direction in which the salient pole portions ₂₁₀ 1 to 210 ₁₀ is raised relative to the flat surface is the same as the direction of filed against the salient pole portions ₂₄₀ 1 to 240 ₂₄ flat plate surface, these directions May be in opposite directions.

  In step S14, as shown in FIG. 14, each of the salient poles raised in step S12 is provided with an exciting winding member and a detection winding around the support part that supports the tip of each salient pole part. A wire member is provided. The exciting winding member is attached to each salient pole portion so as to be in the winding direction shown in FIG. 2, and the detecting winding member is arranged in each winding direction as shown in FIGS. It is attached to the salient pole part.

  Next, in a separate process, the rotors 300 and 400 shown in FIG. 15 are formed by press working. In the first embodiment, the rotor 300 is an annular flat plate, but the outer contour line on the outer diameter side in the plan view has six cycles with respect to the circumference of the given radius with respect to the circumference of the given radius. It has a shape that changes. In the first embodiment, the rotor 400 is an eccentric rotor.

Then, as the rotor mounting step, the rotor 300 having a shape as shown in FIG. 15, so that rotatable relative to the stator 200, each of the salient pole portions ₂₁₀ 1 to 210 ₁₀ filed against flat surface The surface on the inner peripheral side of the salient pole portion and the surface on the outer peripheral side (outer diameter side) of the rotor 300 are provided to face each other, and the rotor 400 is formed on a flat plate surface so as to be rotatable with respect to the stator 200. the surface of the inner peripheral side of the outer peripheral side surface and the rotor 400 of each salient pole portion of the salient pole portions ₂₄₀ 1 to 240 ₂₄ raised against (inner diameter side) is provided so as to face (step S16). More specifically, in the rotor mounting step, the rotor 300 is rotated between the outside of the rotor 300 and the inside of the salient pole portions 210 _{1 to} 210 ₁₀ of the stator 200 by rotation around the rotation axis of the rotor 300. It is provided rotatably with respect to the stator 200 so that the gap permeance with the surface changes. Further, in the rotor mounting step, the rotor 400, between the outer side surface of each salient pole portion of the salient pole portions ₂₄₀ 1 to 240 ₂₄ of the inner stator 200 of the rotor 400 by the rotation of the rotary axis of the rotor 400 It is provided to be rotatable with respect to the stator 200 so that the gap permeance changes. As described above, the resolver 100 according to Embodiment 1 as shown in FIG. 1 is manufactured.

As described above, according to the first embodiment, the resolver 100 with a small number of parts can be manufactured at a low cost by a simple method without reducing the detection accuracy. Further, it is possible to detect the absolute angle by a magnetic circuit formed by the salient pole portions ₂₄₀ 1 to 240 ₂₄ of the rotor 400 and the stator 200, the magnetic circuit formed by the salient pole portions ₂₁₀ 1 to 210 ₁₀ of the rotor 300 and stator 200 The angle can be detected with high accuracy. Therefore, fine adjustment after attaching the resolver 100 (fine adjustment for determining the zero point position) becomes unnecessary, and the resolver 100 can be attached at low cost. In addition, since the absolute angle can be detected by using many salient pole portions located on the outer side than the inner side, the detection accuracy can be improved as compared with the case of detecting the absolute angle on the inner side.

  In the first embodiment, output data corresponding to the rotation angle can be output based on the two sets of two-phase detection signals from the resolver 100 in the first embodiment.

  FIG. 16 is a functional block diagram illustrating a configuration example of the angle detection system according to the first embodiment.

  The angle detection system 700 according to the first embodiment includes the resolver 100 and the resolver processing unit 600 described above. The resolver processing unit 600 includes an excitation signal generation unit 610, a zero point detection unit 620, a relative angle detection unit 630, and an angle processing unit 640.

The excitation signal generator 610 generates an excitation signal between windings R _1i and R _2i (see FIG. 2) of the inner resolver constituted by the rotor 300 of the resolver 100 and is constituted by the rotor 400 of the resolver 100. An excitation signal is generated between the windings R _1o and R _{2o of the} outer resolver. The excitation signal between the windings R _1i and R _2i and the excitation signal between the windings R _1o and R _2o may be asynchronous signals.

The zero point detection unit 620 detects an absolute angle based on detection signals from windings S _1o , S _2o , S _3o , S _4o (see FIG. 4) of the resolver outside the resolver 100, and the absolute angle is detected as the zero position. Determine as. As shown in FIG. 6, the zero point detection unit 620 detects the absolute angle based on the detection signal Eso between the windings S _1o and S _3o and the detection signal Eco between the windings S _2o and S _4o .

The relative angle detector 630 detects the relative angle based on detection signals from the resolver windings S _1i , S _2i , S _3i , S _4i (see FIG. 3) inside the resolver 100. As shown in FIG. 6, the relative angle detection unit 630 detects the relative angle based on the detection signal Esi between the windings S _1i and S _3i and the detection signal Eci between the windings S _2i and S _4i .

  The angle processing unit 640 calculates a detection angle based on the zero point position detected by the zero point detection unit 620 and the relative angle detected by the relative angle detection unit 630, and performs a given process based on the detection angle. It can be performed. Thereby, the resolver processing unit 600 can perform a given control process based on the angle detected with high accuracy based on the detection signal that changes due to the rotation of the rotor of the resolver 100. By executing processing corresponding to output data after processing by such an angle detection system 700, processing according to the rotation angle of the rotor with respect to the stator can be realized.

  In FIG. 16, the resolver processing unit 600 is provided independently of the resolver 100, but the resolver 100 may incorporate some or all of the blocks of the resolver processing unit 600.

[Embodiment 2]
In the resolver 100 according to the first embodiment, the tip shape of the salient pole portion provided in the stator 200 has been described as having a T-shape, but the present invention is not limited to this. The salient pole part of the stator may have a so-called I-shape.

  FIG. 17 is a perspective view of a configuration example of a stator according to the second embodiment of the present invention. In FIG. 17, the same parts as those in FIG.

The stator 800 in the second embodiment, the annular ten that were filed against flat plate surface after which protrudes from the inner circumferential side of the flat plate salient pole portions 810 _{1 to 810} 10 _(first is a magnetic material Salient pole part group) and ₂₄ salient pole parts 840 _{1 to} 840 ₂₄ (second salient pole part group) that are raised from the outer peripheral side of the flat plate and then raised with respect to the flat plate surface. Have. The salient pole portions 810 _{1 to} 810 ₁₀ are formed at the inner edge of the annular flat plate, and the inner peripheral surface of each salient pole portion facing the rotor 300 is not a flat surface but centered on the central portion of the annular flat plate. Forming part of an arc. The salient pole portions 840 _{1 to} 840 ₂₄ are formed on the outer edge of the annular flat plate, and the outer peripheral surface of each salient pole portion facing the rotor 400 is centered on the central portion of the annular flat plate, not the plane. It forms part of an arc. And each salient pole part of salient pole parts 810 ₁ -810 ₁₀ , 840 ₁ -840 ₂₄ has a so-called I-shaped shape, the width of the tip part of salient pole part, and the support part of the salient pole part The width is almost equal.

Also in FIG. 17, no protrusion is formed between the salient pole portions on the inner diameter side of the stator 800, and the minimum inner diameter of the stator 800 after the bending process is the salient poles of the salient pole portions 810 _{1 to} 810 ₁₀ . It is formed so that it may become the internal diameter in a part. Further, no protrusion is formed between the salient pole portions on the outer diameter side of the stator 800, and the maximum outer diameter of the stator 800 after the bending process is outside the salient pole portions of the salient pole portions 840 _{1 to} 840 _24. It is formed to have a diameter.

  FIG. 18 is a perspective view of a configuration example of a resolver according to the second embodiment. In FIG. 18, illustration of wiring is omitted. In FIG. 18, the same parts as those in FIG. 1 or FIG.

In the resolver 900 according to the second embodiment, a so-called outer stator type / inner rotor type angle detection device provided inside and a so-called inner stator type / outer rotor type angle detection device provided outside are integrated. It has the structure which was made. In the outer stator type / inner rotor type angle detection device, a magnetic path is formed between the salient pole portions 810 _{1 to} 810 ₁₀ of the annular stator 800 on the outer peripheral side of the annular rotor 300, and the salient poles of the stator 800 are also provided. The inner circumferential surface (inner circumferential surface) of each of the portions 810 _{1 to} 810 ₁₀ faces the outer circumferential surface (outer circumferential surface) of the rotor 300, and the detection winding provided on the stator 800 according to the rotation angle of the rotor. The signal from the line changes. Further, in the inner stator type / outer rotor type angle detection device, a magnetic path is formed between the salient pole portions 840 _{1 to} 840 ₂₄ of the annular stator 800 on the inner peripheral side of the annular rotor 400, and the stator 800. The outer peripheral surfaces of the salient pole portions 840 _{1 to} 840 ₂₄ face the inner peripheral surface of the rotor 400, and the signal from the detection winding provided on the stator 800 changes according to the rotation angle of the rotor 400. To do. In addition, the outer stator type / inner rotor type angle detection device and the inner stator type / outer rotor type angle detection device are in a state where they are completely magnetically shielded from each other, or in a state in which magnetic influences can be ignored. It has become.

  The resolver 900 in the second embodiment is different from the resolver 100 in the first embodiment in that the tip shape of the salient pole portion of the stator has an I-shape. In the manufacturing process of the resolver 900 in the second embodiment, the procedure is the same as that in FIG. 11 except that the tip shape of the salient pole portion of the stator 800 is an I-shape.

  According to the second embodiment as described above, the machining process can be simplified as compared with the case of processing the stator of the first embodiment, and as in the first embodiment, the number of parts can be reduced and the cost can be reduced and the reliability can be improved. It becomes possible to plan. Further, according to the second embodiment, since the magnetic flux passing through the winding core can be increased, the detection accuracy can be further improved when the number of salient pole portions is small.

In the angle detection system 700 shown in FIG. 16, the resolver 900 in the second embodiment can be applied in place of the resolver 100. In the second embodiment, the salient pole portions 810 _{1 to} 810 ₁₀ and the salient pole portions 840 _{1 to} 840 ₂₄ have been described as having an I-shaped tip, but the salient pole portions 810 _{1 to} 810 ₁₀ and the salient pole portions. The tip shape of each salient pole part constituting one salient pole part group of 840 _{1 to} 840 ₂₄ may be a T-shape.

[Embodiment 3]
In the resolver 100 according to the first embodiment, the salient pole portion provided on the stator 200 is used as a winding magnetic core, and the coil winding as the winding member is provided. However, the present invention is not limited to this. Absent. At least one of the winding member provided at the salient pole portion inside the stator and the winding member provided at the salient pole portion outside the stator may be realized by, for example, a multilayer substrate in which a coil portion is formed in each layer. .

  FIG. 19 is an explanatory diagram of a resolver according to the third embodiment. 19, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. FIG. 19 shows an example in which the winding members provided on the salient pole portions on the inner side and the outer side of the stator are realized by a multilayer substrate in which a coil portion is formed on each layer.

In the resolver 1000 according to the third embodiment, as illustrated in FIG. 19, in the winding member attaching process in step S <b> 14 in FIG. 11, the outer side of the support portion of each salient pole portion 210 _{1 to} 210 ₁₀ of the stator 1100. A multilayer substrate 1110 is attached as a wound winding member. The multilayer substrate 1110 is an insulating substrate in which a spiral conductive layer functioning as an exciting coil portion and a detecting coil portion of the salient pole portions 210 _{1 to} 210 ₁₀ of the stator 1100 is provided on each layer. Are laminated. And the coil part of each layer is electrically connected through the through hole provided in the insulating substrate of each layer. Such a multilayer substrate 1110 is provided with through holes through which the salient pole portions 210 _{1 to} 210 ₁₀ provided in the stator 1100 pass. By passing each salient pole part through the through-hole, as shown in FIG. 19, an exciting coil part and a detecting coil part are wound around the outside of each salient pole part.

Further, as shown in FIG. 19, the winding in winding member mounting step in step S14 of FIG. 11, wound around the outside of the support portion of each salient pole portion of the salient pole portions ₂₄₀ 1 to 240 ₂₄ of the stator 1100 A multilayer substrate 1120 is attached as a member. Multilayer substrate 1120, the respective layers, the insulating substrate spiral conductive layer is provided which serves as a coil portion of the coil portion and the detection for excitation of each salient pole portion of the salient pole portions 240 ₁ to 240 ₂₄ of the stator 1100 Are laminated. And the coil part of each layer is electrically connected through the through hole provided in the insulating substrate of each layer. Such multi-layer substrate 1120, a through hole is provided through the salient pole portion ₂₄₀ 1-240 ₂₄ provided in the stator 1100, respectively. By passing each salient pole part through the through-hole, as shown in FIG. 19, an exciting coil part and a detecting coil part are wound around the outside of each salient pole part.

  Thereafter, in step S16 of FIG. 7, the resolver 1000 in the third embodiment can be manufactured by attaching the rotors 300 and 400 shown in FIG. 19 to the stator 1100 of FIG.

  That is, the resolver 1000 in the third embodiment is different from the resolver 100 in the first embodiment in that the winding member wound around the support portion of each salient pole portion of the stator salient pole portion is not a coil winding but a multilayer. It is a point that is a substrate.

  According to the third embodiment, in addition to the effects of the first embodiment, the exciting winding member and the detecting winding member can be accurately formed according to the standard, and the exciting winding member and the detecting winding member can be formed. The variation in conductance of the winding members can be made extremely small, and the detection accuracy can be increased. Further, the number of exciting windings and the number of detecting windings can be adjusted by the number of substrates to be stacked, and the winding ratio can be easily adjusted.

  In the angle detection system 700 shown in FIG. 16, the resolver 1000 in the third embodiment can be applied in place of the resolver 100.

[Embodiment 4]
In the resolver 100 according to the first embodiment, the nonmagnetic material is provided in the circumferential direction of the flat plate as the magnetic interference reduction means 500 that separates the inner diameter side and the outer diameter side of the stator 200. However, the present invention is limited to this. Is not to be done. In the resolver according to the fourth embodiment of the present invention, a plurality of lobe-shaped loops formed in the circumferential direction of the flat plate so as to separate the inner peripheral side and the outer peripheral side of the annular flat plate as magnetic interference reduction means. The hollow part is adopted.

  FIG. 20 is a perspective view of a configuration example of the resolver 1200 according to the fourth embodiment of the present invention. In FIG. 20, illustration of wiring is omitted. In FIG. 20, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  In the resolver 1200 according to the fourth embodiment, a so-called outer stator type / inner rotor type angle detection device provided inside is integrated with a so-called inner stator type / outer rotor type angle detection device provided outside. It has the structure which was made. Here, in the outer stator type / inner rotor type angle detection device, a magnetic path is formed between the salient pole portion of the annular stator on the outer circumference side of the annular rotor, and the inner circumference side of the salient pole portion of the stator. This surface (inner peripheral surface) faces the outer peripheral surface (outer peripheral surface) of the rotor, and the signal from the detection winding provided in the stator changes according to the rotation angle of the rotor. In the angle detection device of the inner stator type / outer rotor type, a magnetic path is formed between the salient pole portion of the annular stator on the inner circumference side of the annular rotor and the outer circumference side of the salient pole portion of the stator. The surface faces the inner peripheral surface of the rotor, and the signal from the detection winding provided on the stator changes according to the rotation angle of the rotor.

  The angle detection device of the outer stator type / inner rotor type and the angle detection device of the inner stator type / outer rotor type are in a state where the magnetic influence can be ignored.

A resolver 1200 according to the fourth embodiment includes a stator 1300 and first and second rotors 300 and 400. The stator 1300 is provided so as to protrude toward the inner peripheral side of an annular flat plate made of a magnetic material, and then is raised on the outer peripheral side of the flat plate with _ten salient pole portions 210 _{1 to} 210 10 raised relative to the flat plate surface. and a 24 salient poles ₂₄₀ 1-240 ₂₄ filed against flat plate surface after which protrudes. The salient pole portions 210 _{1 to} 210 ₁₀ are formed on the inner edge of the annular flat plate, and the inner peripheral surface of each salient pole portion facing the rotor 300 is not a flat surface but centered on the central portion of the annular flat plate. Forming part of an arc. The salient pole portions 240 ₁ to 240 ₂₄ are formed on the outer edge of the annular flat plate, and the outer peripheral surface of each salient pole portion facing the rotor 400 is centered on the central portion of the annular flat plate, not the plane. It forms part of an arc.

Each salient pole portion _{210 1-210 10,} 240 1 to 240 _24, which works as the winding magnetic core, each winding member _{220 220} 1 _{-220 10,} 250 1 to 250 ₂₄ for excitation and detection are provided .

Salient pole portions ₂₁₀ 1 _{to 210 10,} 240 1 to 240 ₂₄ stator 1300 has, after being pre-formed over a flat plate, the bending press working, is caused to be substantially perpendicular to the flat surface. In the fourth embodiment, the function of the magnetic interference degree reducing means 500 of the first embodiment is a plurality of lobe-shaped hollows formed in the circumferential direction of the flat plate so as to separate the inner peripheral side and the outer peripheral side of the flat plate. Is realized by the department. Thereby, in addition to the effects of the first embodiment, the magnetic interference reduction means can be realized by a simple press work, and the cost can be further reduced.

  The resolver 1200 in the fourth embodiment can be manufactured by the procedure shown in FIG. 11 as in the first embodiment.

FIG. 21 is a perspective view of the stator 1300 in the fourth embodiment before bending press processing. In FIG. 21, the same parts as those in FIG. 20 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
FIG. 22 is a perspective view of the stator 1300 in the fourth embodiment after bending press processing. 22, the same parts as those in FIG. 21 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
FIG. 23 shows a perspective view of the stator 1300 in the fourth embodiment after the winding member attaching step. In FIG. 23, the same parts as those in FIG. 20 or FIG.
FIG. 24 is an explanatory diagram of a rotor attachment process in the fourth embodiment.

The resolver 1200 according to the fourth embodiment first processes the shape of the stator 1300 in the stator shape processing step (step S10), and then in the bending press processing step (bending step), the salient pole portions 210 ₁ to 210 ₁ of the plate-shaped stator 1300. 210 ₁₀ and 240 ₁ to 240 ₂₄ are bent, and a plurality of salient pole portions are raised with respect to the flat plate surface (step S12). In step S10, lobe-shaped hollow portions 1310 _{1 to} 1310 ₁₀ are already formed in the circumferential direction so as to separate the inner peripheral side and the outer peripheral side of the flat plate. Then, winding a winding member mounting step, each salient pole portion of the awakened salient pole portions ₂₁₀ 1 _{to 210 10,} 240 1 to 240 ₂₄ in step S12 as a winding magnetic core, the outside of each salient pole portion A member is provided (step S14).

That is, in the stator shape processing step of step S10, in order to perform the bending press processing of step S12, as shown in FIG. 21, by pressing, SPCC that is ordinary steel or S10C that is carbon steel for mechanical structure is used as a material. salient pole portions ₂₁₀ 1 _{to 210} 10 to the edge of the inner diameter side and outer diameter side of the flat plate made of an annular magnetic _material 240 1-240 ₂₄ and the hollow portion 1310 _{1-1310 10} is formed, the shape of the stator 1300 Is formed. At this time, as described in FIG. 8, the distal end shape of each salient pole portion of the salient pole portions ₂₁₀ 1 _{to 210 10,} 240 1 to 240 ₂₄ to have a T shape, the stator 1300 are formed.

And in step S12, as shown in FIG. 22, it processes so that the several salient pole part formed in step S10 may be raised by bending press processing. As a result, the salient pole portions 210 _{1 to} 210 ₁₀ and 240 ₁ to 240 ₂₄ are raised so as to be substantially perpendicular to the flat plate surface of the stator 1300. As a result, the minimum inner diameter of the stator 1300 after bending is the outer diameter of each of the salient pole portions 210 _{1 to} 210 ₁₀ , and the maximum outer diameter of the stator 1300 after bending is the salient pole portions 240 ₁ to 240 _24. The stator 1300 is formed to have an inner diameter at each salient pole part.

  In step S14, as shown in FIG. 23, on each of the salient pole portions raised in step S12, a winding member for excitation and a winding for detection are provided around the support portion supporting the tip of each salient pole portion. A wire member is provided. The exciting winding member is attached to each salient pole portion so as to be in the winding direction shown in FIG. 2, and the detecting winding member is arranged in each winding direction as shown in FIGS. It is attached to the salient pole part.

Next, in a separate process, the rotors 300 and 400 shown in FIG. 24 are formed by press working. In the fourth embodiment, the rotor 300 is an annular flat plate, but the outer contour line on the outer diameter side in the plan view has six cycles with respect to the circumference of the given radius with respect to the circumference of the given radius. It has a shape that changes. The rotor 400 is an eccentric rotor. Then, as the rotor mounting step, the rotor 300 having a shape as shown in FIG. 24, so that rotatable relative to the stator 1300, the salient pole portions ₂₁₀ 1 to 210 ₁₀ filed against flat surface It is provided so that the inner peripheral surface of the salient pole part and the outer peripheral surface of the rotor 300 face each other (step S16). More specifically, in the rotor mounting step, the rotor 300 is rotated between the outside of the rotor 300 and the inside of the salient pole portions 210 _{1 to} 210 ₁₀ of the stator 1300 by rotation around the rotation axis of the rotor 300. It is provided rotatably with respect to the stator 1300 so that the gap permeance with the surface changes.

Further, as the rotor mounting step, the rotor 400 having a shape as shown in FIG. 24, so that rotatable relative to the stator 1300, the salient pole portions ₂₄₀ 1 to 240 ₂₄ filed against flat surface The surface on the outer peripheral side of the salient pole portion and the surface on the inner peripheral side of the rotor 400 are provided so as to face each other (step S16). More specifically, in the rotor mounting step, the rotor 400, the surface of the outer peripheral side of each salient pole portion of the salient pole portions ₂₄₀ 1 to 240 ₂₄ inside the stator 1300 of the rotor 400 by the rotation of the rotary axis of the rotor 400 Is provided so as to be rotatable with respect to the stator 1300 so that the gap permeance between the stator 1300 and the stator 1300 changes.

  As described above, the resolver 1200 according to the fourth embodiment as shown in FIG. 20 is manufactured.

  As described above, according to the fourth embodiment, it is possible to manufacture the resolver 1200 with a small number of components at a low cost by using a simpler method without lowering the detection accuracy. In the fourth embodiment, similarly to the first embodiment, output data corresponding to the angle can be output with high accuracy based on the two sets of two-phase detection signals from the resolver 1200. The angle detection system to which the resolver 1200 according to the fourth embodiment is applied is the same as that shown in FIG.

[Embodiment 5]
In the stator constituting the resolver in the fourth embodiment, a plurality of lobe-shaped hollow portions in a row are formed in the circumferential direction so as to separate the inner peripheral side and the outer peripheral side of the flat plate. It is not limited to. In the stator constituting the resolver according to the fifth embodiment of the present invention, a plurality of lobe shapes in two rows (a plurality of rows in a broad sense) in the circumferential direction of the flat plate so as to separate the inner peripheral side and the outer peripheral side of the flat plate The hollow part is formed.

  FIG. 25 is a perspective view of the stator 1400 in the fifth embodiment before bending press processing. In FIG. 25, the same parts as those in FIG.

In the stator shape processing step of step S10, in order to perform the bending press processing of step S12, as shown in FIG. 25, an annular made of SPCC, which is ordinary steel, or S10C, which is carbon steel for mechanical structure, is formed by press processing. Salient pole portions 210 _{1 to} 210 ₁₀ , 240 ₁ to 240 ₂₄ and hollow portions 1410 _{1 to} 1410 ₁₀ , 1420 _{1 to} 1420 ₁₀ are formed on the inner diameter side and outer diameter side edges of the flat plate made of the above magnetic material, The shape of the stator 1400 is formed. That is, a plurality of hollow portions are formed in two rows in the circumferential direction of the annular flat plate.

Here, so as to pass the straight line connecting the inner circumferential side and the outer peripheral side in a flat plate stator 1400 at the shortest distance, at least one hollow portion 1410 _{1-1410 10,} 1420 _{1-1420 10,} hollow portion 1410 _{1 to} 1410 ₁₀ and 1420 _{1 to} 1420 ₁₀ are desirably provided. By doing so, the degree of magnetic interference between the inner peripheral side and the outer peripheral side can be more reliably reduced.

  By using such a stator 1400, a resolver can be manufactured as in the fourth embodiment. According to the stator 1400 in the fifth embodiment, compared with the fourth embodiment, the influence of the magnetic circuit formed on the outer peripheral side of the flat plate and the magnetic circuit formed on the inner play side of the flat plate can be further reduced. Will be able to. As a result, the angle can be detected more accurately than in the fourth embodiment.

[Embodiment 6]
In the fourth embodiment, the axial multiplier of the outer rotor 400 is “1” and the axial multiplier of the inner rotor 300 is “6”, but the present invention is not limited to this. In Embodiment 6 according to the present invention, the outer rotor has an axial multiplication angle of “6”, and the inner rotor has an axial multiplication angle of “1”.

  FIG. 26 is a perspective view of a configuration example of the resolver 1500 according to the sixth embodiment of the present invention. In FIG. 26, illustration of wiring is omitted. In FIG. 26, the same parts as those in FIG. 20 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  In the resolver 1500 according to the sixth embodiment, a so-called outer stator type / inner rotor type angle detection device provided on the inside and a so-called inner stator type / outer rotor type angle detection device provided on the outside are integrated. It has the structure which was made. In the angle detection device of the outer stator type / inner rotor type, a magnetic path is formed between the salient pole portion of the annular stator on the outer circumference side of the annular rotor, and the inner circumferential surface of the salient pole portion of the stator ( The inner peripheral surface) faces the outer peripheral surface (outer peripheral surface) of the rotor, and the signal from the detection winding provided on the stator changes according to the rotation angle of the rotor. In the angle detection device of the inner stator type / outer rotor type, a magnetic path is formed between the salient pole portion of the annular stator on the inner circumference side of the annular rotor and the outer circumference side of the salient pole portion of the stator. The surface faces the inner peripheral surface of the rotor, and the signal from the detection winding provided on the stator changes according to the rotation angle of the rotor.

  The angle detection device of the outer stator type / inner rotor type and the angle detection device of the inner stator type / outer rotor type are in a state where the magnetic influence can be ignored.

The resolver 1500 in the sixth embodiment includes a stator 1300 and first and second rotors 1600 and 1700. The stator 1300 is provided so as to protrude toward the inner peripheral side of an annular flat plate made of a magnetic material, and then is raised on the outer peripheral side of the flat plate with _ten salient pole portions 210 _{1 to} 210 10 raised relative to the flat plate surface. with 24 salient poles ₂₄₀ 1-240 ₂₄ filed against flat plate surface after which it protrudes. The salient pole portions 210 _{1 to} 210 ₁₀ are formed at the inner edge of the annular flat plate, and the inner peripheral surface of each salient pole portion facing the rotor 1600 is centered on the central portion of the annular flat plate, not the plane. Forming part of an arc. The salient pole portions 240 ₁ to 240 ₂₄ are formed at the outer edge of the annular flat plate, and the outer peripheral surface of each salient pole portion facing the rotor 1700 is centered on the central portion of the annular flat plate, not the plane. It forms part of an arc.

Each salient pole portion _{210 1-210 10,} 240 1 to 240 _24, which works as the winding magnetic core, each winding member _{220 220} 1 _{-220 10,} 250 1 to 250 ₂₄ for excitation and detection are provided .

Salient pole portions ₂₁₀ 1 _{to 210 10,} 240 1 to 240 ₂₄ stator 1300 has, after being pre-formed over a flat plate, the bending press working, is caused to be substantially perpendicular to the flat surface.

The rotor 1600 is made of a magnetic material and is provided so as to be rotatable with respect to the stator 1300. More specifically, in the rotor 1600, the gap permeance between the salient pole portions 210 _{1 to} 210 ₁₀ of the stator 1300 and the inner peripheral surface changes due to the rotation of the rotor 1600 around the rotation axis. As described above, the stator 1300 is rotatably provided. In the sixth embodiment, it is assumed that the shaft angle multiplier of the rotor 1600 is “1”. That is, the rotor 1600 is an eccentric rotor.

The rotor 1700 is made of a magnetic material and is provided so as to be rotatable with respect to the stator 1300. More specifically, rotor 1700, to change the gap permeance between the outer side surface of each salient pole portion of the salient pole portions ₂₄₀ 1 to 240 ₂₄ of the stator 1300 by the rotation of the rotary axis of the rotor 1700 The stator 1300 is rotatable. In the sixth embodiment, it is assumed that the shaft angle multiplier of the rotor 1700 is “6”. That is, in the top view, the diameter of the outer contour line on the inner peripheral side of the rotor 1700 changes in six cycles.

  Such a resolver 1500 in the sixth embodiment can be manufactured by the procedure shown in FIG. 11 as in the fourth embodiment.

  In the sixth embodiment, output data corresponding to the rotation angle can be output based on two sets of two-phase detection signals from the resolver 1500.

  FIG. 27 is a functional block diagram illustrating a configuration example of the angle detection system according to the sixth embodiment.

The angle detection system 1800 in the sixth embodiment is different from the angle detection system 700 in the first embodiment shown in FIG. 16 in that the zero point detection unit 620 detects the detection signal between the windings S _1i and S _3i , the windings S _2i , S _The relative angle detection unit 630 detects the relative angle based on the detection signal between the windings S _1o and S _3o and the detection signal between the windings S _2o and S _4o. It is a point to do.

  By executing the processing corresponding to the output data from the angle detection system 1800 as described above, processing according to the rotation angle of the rotor with respect to the stator can be realized.

  In FIG. 27, the resolver processing unit 600 is provided independently of the resolver 1500, but the resolver 1500 may incorporate a part or all of the blocks of the resolver processing unit 600.

[Embodiment 7]
In the resolver 1500 according to the sixth embodiment, the tip shape of the salient pole portion provided in the stator 1300 is described as having a T-shape, but the present invention is not limited to this. The salient pole part of the stator may have a so-called I-shape.

  FIG. 28 is a perspective view of a configuration example of a resolver in the seventh embodiment. In FIG. 28, illustration of wiring is omitted. In FIG. 28, the same parts as those in FIG. 18 or FIG.

In the resolver 1900 according to the seventh embodiment, a so-called outer stator type / inner rotor type angle detection device provided on the inside and a so-called inner stator type / outer rotor type angle detection device provided on the outside are integrated. It has the structure which was made. In the outer stator type / inner rotor type angle detection device, a magnetic path is formed between the salient pole portions 810 _{1 to} 810 ₁₀ of the annular stator 2000 on the outer peripheral side of the annular rotor 1600, and the salient poles of the stator 2000. The inner circumferential surface (inner circumferential surface) of each of the portions 810 _{1 to} 810 ₁₀ faces the outer circumferential surface (outer circumferential surface) of the rotor 1600, and the detection winding provided on the stator 2000 according to the rotation angle of the rotor. The signal from the line changes. Further, in the inner stator type / outer rotor type angle detection device, a magnetic path is formed between the salient pole portions 840 _{1 to} 840 ₂₄ of the annular stator 2000 on the inner peripheral side of the annular rotor 1700, and the stator 2000. The outer peripheral surfaces of the salient pole portions 840 _{1 to} 840 ₂₄ face the inner peripheral surface of the rotor 1700, and the signal from the detection winding provided on the stator 2000 changes according to the rotation angle of the rotor. To do. The outer stator type / inner rotor type angle detection device and the inner stator type / outer rotor type angle detection device are magnetically completely disconnected from each other by a plurality of hollow portions, or are mutually magnetic. The effect is negligible.

  The resolver 1900 in the seventh embodiment is different from the resolver 1500 in the sixth embodiment in that the tip shape of the salient pole part of the stator has an I-shape. In the manufacturing process of the resolver 1900 in the seventh embodiment, the procedure is the same as that in FIG. 11 except that the tip shape of the salient pole portion of the stator 2000 is an I-shape.

  According to the seventh embodiment, the machining process can be simplified as compared with the case of processing the stator of the sixth embodiment, and as in the sixth embodiment, the number of parts is reduced and the cost is reduced and the reliability is improved. Can be planned. Further, according to the seventh embodiment, since the magnetic flux passing through the winding core can be increased, the detection accuracy can be further improved when the number of salient pole portions is small.

In the angle detection system 1800 shown in FIG. 27, the resolver 1900 according to the seventh embodiment can be applied instead of the resolver 1500. In the seventh embodiment, the salient pole portions 810 _{1 to} 810 ₁₀ and the salient pole portions 840 _{1 to} 840 ₂₄ are described as having an I-shaped tip, but the salient pole portions 810 _{1 to} 810 ₁₀ and the salient pole portions are provided. The tip shape of each salient pole part constituting one salient pole part group of 840 _{1 to} 840 ₂₄ may be a T-shape.

  As mentioned above, although the angle detection device concerning the present invention was explained based on the above-mentioned embodiment, the present invention is not limited to this, and can be implemented in the range which does not deviate from the gist, for example, The following modifications are possible.

  (1) In each of the above embodiments, the resolver as the angle detection device has been described as one-phase excitation two-phase output type, but the present invention is not limited to this. The resolver in each of the above embodiments may be a signal having an excitation signal having a phase other than one phase, or a detection signal having a phase other than two phases.

  (2) In each of the above embodiments, the stator material made of a magnetic material has been described as being a normal steel or a carbon steel material for mechanical structure, but the present invention is not limited to this. The stator which concerns on this invention should just be formed with the material which has the reliability with respect to bending press work.

  (3) In each of the above embodiments, the rotor having the shaft angle multiplier “1” is realized by the eccentric rotor, but the present invention is not limited to this. For example, without making the rotation axis of the rotor eccentric, the shape of the rotor, which is an annular flat plate, can be set to the inner diameter side or the outer side in a plan view with respect to the circumference of a given radius. The outer contour line on the radial side may have a shape that changes in one cycle.

  (4) The aspect which employ | adopts a multilayer substrate as a winding member demonstrated in said Embodiment 3 is not limited to Embodiment 3, You may apply to the winding member of said other embodiment. .

  (5) A mode in which the function of the magnetic interference reduction means is realized by one or a plurality of rows of hollow portions described in the fourth embodiment or the fifth embodiment is limited to the fourth embodiment or the fifth embodiment. Instead, it may be applied to the other embodiments described above.

  (6) In each of the embodiments described above, the number of outer salient pole parts is “24” and the number of inner salient pole parts is “10”, but the present invention is not limited to these salient pole part numbers.

  (7) In each of the above embodiments, a double-speed resolver using a rotor with a shaft angle multiplier of “1” and a rotor with a shaft angle multiplier of “6” has been described as an example. It may be “2”, “3”, “4”, “5”, “7”, “8”, “10”, “12” other than “6”. Further, it may be a double speed resolver in which two types of rotors having a shaft angle multiplier other than “1” are combined.

The perspective view of the structural example of the resolver in Embodiment 1 which concerns on this invention. Explanatory drawing of the winding member for excitation provided in the salient pole part of the stator of FIG. Explanatory drawing of the winding member for a detection provided in the salient pole part of the stator of FIG. Explanatory drawing of the winding member for a detection provided in the salient pole part of the stator of FIG. FIG. 2 is an explanatory diagram of a magnetic circuit formed in the resolver of FIG. 1. FIG. 3 is a diagram illustrating an example of a waveform of a detection signal extracted from a winding member for detecting a resolver according to the first embodiment. Explanatory drawing of the magnetization characteristic of the material of a stator. FIG. 3 is an explanatory diagram schematically illustrating the shape of salient pole portions in the first embodiment. FIG. 3 is a top view of the stator in the first embodiment. FIG. 10 is a cross-sectional view taken along line AB in FIG. 9. FIG. 3 is a flowchart of an example of a resolver manufacturing method according to the first embodiment. The perspective view of the stator in Embodiment 1 before bending press processing. The perspective view of the stator in Embodiment 1 after bending press processing. The perspective view of the stator in Embodiment 1 after a winding member attachment process. Explanatory drawing of the rotor attachment process in Embodiment 1. FIG. 1 is a functional block diagram of a configuration example of an angle detection system in Embodiment 1. FIG. FIG. 6 is a perspective view of a configuration example of a stator in Embodiment 2. FIG. 6 is a perspective view of a configuration example of a resolver in the second embodiment. Explanatory drawing of the resolver in Embodiment 3. FIG. The perspective view of the structural example of the resolver in Embodiment 4 which concerns on this invention. The perspective view of the stator in Embodiment 4 before bending press processing. The perspective view of the stator in Embodiment 4 after bending press processing. The perspective view of the stator in Embodiment 4 after a winding member attachment process. Explanatory drawing of the rotor attachment process in Embodiment 4. FIG. The perspective view of the stator in Embodiment 5 before bending press processing. The perspective view of the structural example of the resolver in Embodiment 6 which concerns on this invention. FIG. 10 is a functional block diagram of a configuration example of an angle detection system in a sixth embodiment. The perspective view of the structural example of the resolver in Embodiment 7 which concerns on this invention. FIG. 29A shows a structure of a conventional resolver. FIG.29 (b) is explanatory drawing of the coil | winding structure in each slot of the conventional resolver.

Explanation of symbols

100, 900, 1000, 1200, 1500, 1900 ... resolver,
200, 800, 1100, 1300, 1400 ... stator,
300, 400, 1600, 1700 ... rotor,
210 _{1 to} 210 ₁₀ , 240 ₁ to 240 ₂₄ , 810 _{1 to} 810 ₁₀ , 840 _{1 to} 840 ₂₄ ... salient pole part,
212 ₁ ... tip portion, 214 ₁ ... support portion,
220 _{1 to} 220 ₁₀ , 250 ₁ to 250 ₂₄ ... winding members,
500 ... Magnetic interference reduction means 600 ... Resolver processing unit,
610 ... excitation signal generation unit, 620 ... zero point detection unit, 630 ... relative angle detection unit,
640 ... Angle processing unit, 700, 1800 ... Angle detection system,
1110, 1120 ... multilayer substrate,
1310 _{1 to} 1310 ₁₀ , 1410 _{1 to} 1410 ₁₀ , 1420 _{1 to} 1420 ₁₀ ... Hollow portion

Claims (13)

A first salient pole group formed on the inner peripheral side of an annular flat plate made of magnetic material and raised by bending, and a second salient pole group formed on the outer peripheral side of the flat plate and raised by bending A stator provided with a winding member for excitation and a winding member for detection, with each salient pole part constituting the first and second salient pole part groups as a winding core;
It is made of a magnetic material, and can rotate with respect to the stator so that the gap permeance between the salient pole portions constituting the first salient pole portion group and the inner peripheral surface changes by rotation around the rotation axis. A first rotor provided in
It is made of a magnetic material and is rotatable with respect to the stator so that the gap permeance between the salient pole portions constituting the second salient pole portion group and the outer peripheral surface changes by rotation around the rotation axis. A second rotor provided,
The stator is
Magnetic between a magnetic circuit formed by the first salient pole group and the first rotor, and a magnetic circuit formed by the second salient pole group and the second rotor An angle detection apparatus comprising a magnetic interference degree reducing means for reducing the interference degree. In claim 1,
The magnetic interference reduction means is
An angle detection device comprising a nonmagnetic material formed so as to separate an inner peripheral side and an outer peripheral side of the flat plate. In claim 1,
The magnetic interference reduction means is
An angle detection device comprising a plurality of lobe-shaped hollow portions formed in a circumferential direction of the flat plate so as to separate an inner peripheral side and an outer peripheral side of the flat plate. In any one of Claims 1 thru | or 3,
One of the first and second rotors is
An angle detection device characterized in that the rotor has a shaft angle multiplier of “1”. In any one of Claims 1 thru | or 4,
The tip shape of each salient pole part constituting at least one salient pole part group of the first and second salient pole part groups has a T-shape, and support for supporting the tip part of each salient pole part An angle detection device comprising the winding member for excitation and the winding member for detection provided around a portion. In any one of Claims 1 thru | or 5,
The stator is made of SPCC, which is ordinary steel, or S10C, which is carbon steel for mechanical structure. In any one of Claims 1 thru | or 6.
A zero point detection unit for detecting a zero point based on a detection signal from the winding member in accordance with one rotation angle of the first and second rotors with respect to the stator;
An angle detection device comprising: a relative angle detection unit configured to detect a relative angle based on a detection signal from the winding member corresponding to the other rotation angle of the first and second rotors with respect to the stator; . A first salient pole part group formed on the inner peripheral side of a stator made of an annular flat plate, which is a magnetic material, and a second salient pole part group formed on the outer peripheral side of the flat plate, with respect to the flat plate surface A bending process of bending to wake up,
A winding member in which each salient pole part constituting the first and second salient pole part groups is used as a winding magnetic core, and a winding member for excitation and a winding member for detection are wound around each salient pole part. Installation process;
It is made of a magnetic material and is rotatable with respect to the stator so that a gap permeance between each of the salient pole portions constituting the first salient pole portion group and a surface on the inner peripheral side is changed by rotation around the rotation axis. In the stator, the gap permeance between the first rotor and the outer surface of each salient pole part constituting the second salient pole part group is changed by rotation around the rotation axis made of a magnetic material. A rotor mounting step for mounting a second rotor rotatable relative to the rotor;
The stator is
Magnetic between a magnetic circuit formed by the first salient pole group and the first rotor, and a magnetic circuit formed by the second salient pole group and the second rotor A method of manufacturing an angle detection apparatus, comprising: a magnetic interference degree reducing means for reducing the interference degree. In claim 8,
The magnetic interference reduction means is
A method of manufacturing an angle detection device, wherein the angle detection device is a nonmagnetic material formed so as to separate an inner peripheral side and an outer peripheral side of the flat plate. In claim 8,
The magnetic interference reduction means is
A method of manufacturing an angle detection device, comprising: a plurality of lobe-shaped hollow portions formed in a circumferential direction of the flat plate so as to separate an inner peripheral side and an outer peripheral side of the flat plate. In any one of Claims 8 thru | or 10.
One of the first and second rotors is
A method for manufacturing an angle detecting device, wherein the rotor has a shaft angle multiplier of “1”. In any of claims 8 to 11,
The tip shape of each salient pole part constituting at least one salient pole part group of the first and second salient pole part groups has a T-shape, and support for supporting the tip part of each salient pole part A method for manufacturing an angle detection device, wherein the winding member for excitation and the winding member for detection are provided around a portion. In any one of Claims 8 thru | or 12.
The method of manufacturing an angle detection device according to claim 1, wherein the stator is made of SPCC, which is plain steel, or S10C, which is carbon steel for mechanical structure.

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