JP2009270914A - Resolver and angle detection device - Google Patents

Abstract

A resolver capable of reducing the cost and improving the detection accuracy regardless of the shaft angle multiplier and an angle detection device including the resolver are provided.
A resolver includes a stator having first and second stator core pairs each having a winding member, and a diameter of an outer contour line of the stator is N (N is N). And a rotor 160 that changes in a natural number) cycle. The first and second stator core pairs are the other stator cores constituting each stator core pair when the degree of electromagnetic coupling between the one stator core constituting each of the first and second stator core pairs and the rotor 160 is maximum. And the rotor 160 are arranged such that the output voltage of the second stator core pair becomes zero when the degree of electromagnetic coupling between the rotor and the rotor 160 is minimum and the absolute value of the output voltage of the first stator core pair is maximum.
[Selection] Figure 1

Description

  The present invention relates to a resolver and an angle detection device including the resolver.

  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. 18 is a diagram for explaining a conventional resolver. FIG. 18A is a diagram showing the structure of a conventional resolver, and FIG. 18B is a diagram showing the output voltage from the conventional resolver.

  In the conventional resolver 800, as shown in FIG. 18A, a one-phase excitation winding 804 and a two-phase output winding (SIN output winding 806 and COS output winding 807) are wound around a salient pole 803. This is a variable reluctance resolver including the stator 801 and a rotor 805 that is rotatably provided to the stator 801. The rotor 805 is an eccentric rotor having only an iron core and no windings, and the gap permeance between the rotor 805 and the stator 801 changes in a sinusoidal shape with respect to the rotation angle θ. Therefore, according to the conventional resolver 800, as shown in FIG. 18B, the rotation angle can be detected with high accuracy by measuring the gap permeance described above.

  FIG. 19 is a diagram for explaining another conventional resolver. FIG. 19A is a diagram showing the structure of another conventional resolver, and FIG. 19B is a diagram for explaining the winding structure in each slot of another conventional resolver.

  As shown in FIG. 19A, another conventional resolver 900 includes a one-phase excitation winding 904 and a two-phase output winding (SIN output winding 906 and COS output winding 907 (FIG. 19A). )) Is a variable reluctance resolver including a stator 901 wound around a salient pole 903 and a rotor 905 provided to be rotatable with respect to the stator 901. The rotor 905 is an eccentric rotor that has only an iron core and does not have windings. As in the case of the conventional resolver 800, the gap permeance between the rotor 905 and the stator 901 changes sinusoidally with respect to the rotation angle θ. . For this reason, according to the conventional resolver 900, as shown in FIG. 19B, the rotation angle can be detected with high accuracy by measuring the gap permeance described above.

  Further, in the conventional resolver 900, two-phase output windings (SIN output winding 906 and COS output winding 907) are wound sequentially in each slot 902 by one slot pitch (without slot skipping). (Not shown in FIG. 19A). Further, as shown in FIG. 19B, the distributed winding is performed so that the induced voltage distribution is a sinusoidal distribution. (The number of turns (amount) of the windings is also a sinusoidal distribution).

  For this reason, according to the conventional resolver 900, 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.

JP-A-8-178611

  By the way, also in this kind of resolver, cost reduction and improvement in detection accuracy are desired. However, in the conventional resolver, since the voltage change of the output signal is realized by the turn ratio of the output winding, there is a problem that the manufacturing process becomes complicated and it is difficult to reduce the cost. Moreover, since the exciting winding and the output winding are realized by winding a metal wire around the winding magnetic core, it is difficult to make the winding state uniform, and the detection accuracy of the resolver can be improved. There was a problem that it was difficult.

  On the other hand, in order to increase the detection accuracy of the resolver, there is a method of increasing the shaft multiple angle of the resolver rotor. However, in the conventional resolver, when the shaft angle multiplier of the rotor is increased, mounting of the excitation winding and the output winding becomes difficult, and the manufacturing process becomes complicated. Therefore, there is a limit to increasing the detection accuracy of the resolver by increasing the shaft multiplication angle, and there is a problem that it is difficult to further improve the detection accuracy of the resolver.

  The present invention has been made in view of the technical problems as described above. The object of the present invention is to include a resolver capable of reducing the cost and improving the detection accuracy regardless of the shaft angle multiplier, and the resolver. An object of the present invention is to provide an angle detection device.

  In order to solve the above-described problems, the present invention provides a stator having first and second stator core pairs each formed of a stator core having a winding member, and is provided rotatably with respect to the stator. And the first and second stator core pairs include one stator core constituting each of the first and second stator core pairs, and a rotor having a wire diameter that changes in a cycle of N (N is a natural number). When the degree of electromagnetic coupling with the rotor is maximum, the degree of electromagnetic coupling between the other stator core and the rotor constituting each stator core pair is minimum, and the absolute value of the output voltage of the first stator core pair is maximum A stator core that is arranged so that an output voltage of the second stator core pair becomes zero, and that constitutes the stator by rotation around the rotation axis of the rotor Relating to resolver degree of electromagnetic coupling between the rotor is changed.

  According to the present invention, when the degree of electromagnetic coupling between the rotor whose outer contour line diameter changes in N cycles and one stator core of the first and second stator core pairs is maximum, The output voltage of the second stator core pair is zero when the degree of electromagnetic coupling between the other stator core and the rotor constituting the stator core pair is minimum and the absolute value of the output voltage of the first stator core pair is maximum. Since the resolver is configured so that the stator core and the rotor change the electromagnetic coupling degree by the rotation around the rotation axis of the rotor, the stator winding is output from the output winding according to the position of the stator core regardless of the shaft angle multiplier The signal can be extracted. As a result, the cost of the resolver can be reduced, and the stator core can be arranged even when the shaft angle multiplier is increased, so that the detection accuracy can be further improved.

  In the resolver according to the present invention, N may be 2 or more.

  According to the present invention, it is possible to reduce the cost and further improve the detection accuracy of a resolver having a rotor having a shaft angle multiplier of “2” or more.

  In the resolver according to the present invention, the two stator cores constituting each pair of stator cores are (360 k / 2N) (k is an odd number smaller than 2N) in the first rotational direction along the circumference around the rotation axis. May be spaced apart.

  According to the present invention, when the degree of electromagnetic coupling between one stator core pair constituting each stator core pair of the first and second stator core pairs is maximum, the other stator core constituting each stator core pair is electromagnetically coupled to the rotor. Since the stator core can be arranged such that the output voltage of the second stator core pair becomes zero when the degree of output voltage is the minimum and the absolute value of the output voltage of the first stator core pair is the maximum, The detection accuracy can be further improved.

  In the resolver according to the present invention, the one stator core that constitutes the first stator core pair and the one stator core that constitutes the second stator core pair include the first stator core along the circumference around the rotation axis. 1 (360 k / 4N + (360 m / N)) (k is an odd number smaller than 2N, m is an integer of 0 or more).

  According to the present invention, when the degree of electromagnetic coupling between one stator core pair constituting each stator core pair of the first and second stator core pairs is maximum, the other stator core constituting each stator core pair is electromagnetically coupled to the rotor. When the absolute value of the output voltage of the first stator core pair is minimum and the output voltage of the second stator core pair is zero when the absolute value of the output voltage of the first stator core pair is maximum, the arrangement of the stator core can be realized more easily. Even if it becomes larger, the detection accuracy can be further improved at low cost.

  In the resolver according to the present invention, the winding members of the stator core pairs may have the same number of windings.

  According to the present invention, since the stator core can be arranged while keeping the number of windings of the winding cores of the stator core all the same, a complicated winding operation is unnecessary, the manufacturing process can be simplified, Cost can be reduced.

  In the resolver according to the present invention, when N is 3 or more, the stator core angle of each stator core constituting each stator core pair is (180 / N) degrees around the rotation axis, and each stator core pair is constituted. The two stator cores may be arranged apart from each other by an angle smaller than 180 degrees in the first rotation direction along a circumference around the rotation axis.

  According to the present invention, since the stator core is arranged in a part of the periphery of the rotor, there is no restriction on the manufacturing process when the rotor is assembled in the manufacturing process, and the rotor can be inserted from the lateral direction, for example. become. Thereby, the freedom degree of a manufacturing process becomes high and it becomes possible to aim at the cost reduction of a manufacturing process.

  Further, in the resolver according to the present invention, the stator core has a shape in which a circular arc portion having a given radius is cut from the rotation shaft from a sector shape having a stator core angle around the rotation shaft as a central angle in a top view. be able to.

  According to the present invention, it is possible to arrange two adjacent stator cores as close as possible to each other along a circumference around the rotation axis of the rotor.

  Further, in the resolver according to the present invention, each stator core constituting each pair of stator cores connects an upper stator plate, a lower stator plate, the upper stator plate and the lower stator plate, and is excited on the outside thereof. A winding magnetic core on which the winding member consisting of a winding and an output winding is wound, and the upper stator plate and the lower stator plate leave a magnetic gap and You may be provided so that a part may be inserted | pinched from both sides.

  In the present invention, since the rotor is inserted into the gap between the upper stator plate and the lower stator plate of the stator core, the overlapping area of the rotor and the stator core in the top view changes due to the rotation of the rotor and is formed in the stator. The magnetic flux passing through the magnetic path changes and the output signal changes. Therefore, according to the present invention, in addition to the effects of any of the above-described inventions, the resolver can have a flat structure, so that the degree of freedom in mounting the resolver can be increased.

  According to another aspect of the present invention, there is provided an angle detection device comprising: the resolver according to any one of the above, and a converter that outputs a digital signal corresponding to an output signal from a winding member of the resolver according to a rotation angle of the rotor with respect to the stator. Related to the device.

  According to the present invention, it is possible to provide an angle detection device capable of reducing the cost and improving the detection accuracy irrespective of the shaft angle multiplier.

  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.

FIG. 1 is a perspective view of a configuration example of a resolver in an embodiment according to the present invention. In FIG. 1, it is assumed that the axial multiplication angle of the resolver rotor in the present embodiment is “4”.
FIG. 2 is a top view of the resolver in the present embodiment. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The resolver 10 in the present embodiment includes a stator 100 and a rotor 160 that is rotatably arranged with respect to the stator 100. The stator 100 has a plurality of stator cores arranged on a support substrate made of a nonmagnetic material at a given interval (a given angular interval) and each having a winding member. In the present embodiment, the resolver 10 includes two stator core pairs (first and second stator core pairs) in which each stator core pair includes two stator cores. As shown in FIG. 1 or FIG. 2, the support substrate has a substantially C-shaped shape in which a part of the angular range of the ring-shaped substrate is cut out when viewed from above, but may be a ring-shaped substrate.

  The stator core constituting the stator 100 is made of a magnetic material. In FIG. 1, in order to output a two-phase output signal, the stator 100 has four stator cores 162a, 162b, 162c, and 162d. The first phase output signal is output using the stator cores 162a and 162c, and the second phase output signal is output using the stator cores 162b and 162d.

  The rotor 160 is made of a magnetic material, has a shape in which the diameter of its outer contour line changes periodically in a top view, and rotates around a rotation axis (not shown). In FIG. 1, since the shaft angle multiplier is “4”, the shape of the outer contour line of the rotor 160 has a shape in which the change in diameter is four periods when viewed from above.

  The stator 100 has a ring-shaped or substantially C-shaped support body 200 as shown in FIG. 1, and stator cores 162 a, 162 b, 162 c, and 162 d are fixed to the support body 200. The winding member of the stator core in the present embodiment is a sheet-like coil portion wound around the winding magnetic core constituting the stator core, and the coil portions 172a, 172b, 172c of the stator cores 162a, 162b, 162c, 162d. , 172d are formed on the support substrate 180.

  In the resolver 10, the support 200 supports the support substrate 180. The support substrate 180 is a multilayer substrate in which a plurality of substrates each having a coil portion formed so that a spiral conductive layer is wound around a winding magnetic core of each stator core. And the coil part of each layer is electrically connected through a through hole. The winding member includes a coil portion for exciting winding and a coil portion for output winding. By doing so, the number of excitation windings and the number of output windings can be adjusted by the number of substrates to be stacked, and the winding ratio can be easily adjusted.

  As shown in FIG. 1 or FIG. 2, the support substrate 180 preferably has a substantially C-shape with a given angle range cut out when viewed from above. By doing so, when incorporating the rotor 160 in the manufacturing process of the resolver 10, there is no restriction in the manufacturing process, and for example, the rotor 160 can be inserted from the lateral direction. Thereby, the freedom degree of a manufacturing process becomes high and it becomes possible to aim at the cost reduction of a manufacturing process.

  The resolver 10 is fixed to a fixing plate (not shown) through the mounting hole 220 and is configured to be attachable to a device on which the resolver 10 is mounted. Here, the attachment hole 220 is provided so as to be longer in the circumferential direction than in the radial direction around the rotation axis of the rotor 160. Thereby, when fixing to the fixed plate through the mounting hole 220, the resolver 10 can be rotated in the circumferential direction of the rotor 160, and the fixing position of the resolver 10 to the fixed plate can be finely adjusted in the circumferential direction. It has become. By doing so, the installation angle of the resolver 10 can be adjusted after the resolver 10 is attached to the fixed plate, so that the installation process of the resolver 10 can be simplified.

  As described above, the resolver 10 includes the stator 100 and the rotor 160 provided to be rotatable with respect to the stator 100, and the rotation of the rotor 160 with respect to the stator 100 in a state excited by the one-phase excitation signals R <b> 1 and R <b> 2. Two-phase output signals S1 to S4 corresponding to the angle are output. The output signals S1 to S4 from the resolver 10 are output to an R / D converter (converter in a broad sense) (not shown), and the R / D converter outputs digital signals corresponding to the two-phase output signals S1 to S4. Generated and output as serial data or parallel data.

  In FIG. 1 or 2, the rotor 160 has been described as having a shaft angle multiplier of “4”, but the present invention is not limited to this.

  3A and 3B show examples of top views of the rotor 160 in the present embodiment. FIG. 3A shows a top view when the axial multiplication angle of the rotor 160 is “4”, and FIG. 3B shows a top view when the axial multiplication angle of the rotor 160 is “5”.

  As described above, in the present embodiment, the diameter of the outer contour line of the rotor 160 periodically changes in a top view. More specifically, when the shaft angle multiplier is “N” (N is a natural number), the diameter of the outer contour line of the rotor 160 changes in N cycles in a top view. For example, when the shaft angle multiplier is “4”, as shown in FIG. 3A, the diameter of the outer contour line of the rotor 160 changes in four cycles in the top view, and the rotor 160 has a reference line 160a having a constant diameter. There are four chevron portions (protruding portions) that protrude relative to. Further, for example, when the shaft angle multiplier is “5”, as shown in FIG. 3B, the diameter of the outer contour line of the rotor 160 ′ changes in five cycles in the top view, and the rotor 160 ′ has a constant diameter. There are five chevron portions (protruding portions) projecting with respect to the reference line 160a ′.

  Note that the shaft angle multiplier N is preferably “2” or more. Further, it is desirable that the outer contour of the rotor 160 changes so that the shape of the chevron on the outer periphery of the rotor 160 is substantially the same.

  Such a rotor 160 (160 ′) is electromagnetically coupled with each stator core, and an electromagnetic coupling area (in a broad sense, an electromagnetic coupling degree) with each stator core by rotation of the rotor 160 (160 ′) around a rotation axis (not shown). ) Is changing.

FIG. 4 is a perspective view of the stator core in the present embodiment. However, in FIG. 4, only one layer of the multilayer substrates constituting the support substrate 180 is shown.
FIG. 5 shows another perspective view of the stator core of FIG. 4 and 5 show a configuration example of the stator core 162a, the stator cores 162b, 162c, and 162d can be similarly configured.

  The stator core 162a has a shape in which a circular arc portion having a given radius from the rotation axis is cut out from a sector shape having a stator core angle around the rotation axis of the rotor 160 as a central angle in a top view. In this way, if the adjacent stator cores are electromagnetically cut off, the two stator cores can be placed as close as possible and arranged along the circumference centered on the rotation axis of the rotor 160. Become.

  Here, the stator core 162a includes an upper stator plate 196a, a lower stator plate 190a, and a winding magnetic core 194a. In FIG. 4, the illustration of the upper stator plate 196a is omitted. The winding magnetic core 194a connects the upper stator plate 196a and the lower stator plate 190a, and a winding member composed of an excitation winding and an output winding is wound on the outside thereof. In FIG. 4, the winding member is a coil portion 172 a formed on the support substrate 180. And as shown in FIG. 5, the protrusion parts 198a and 192a are integrally formed in the inner surface which the front-end | tip part of the upper stator plate 196a and the lower stator plate 190a mutually opposes, respectively.

  FIG. 6 schematically shows a cross-sectional view taken along line AA of FIG. In FIG. 6, the same parts as those in FIG. 2, FIG. 4, or FIG.

  As shown in FIG. 6, the support 200 supports the support substrate 180, and the support substrate 180 includes a coil portion formed so that a spiral conductive layer is wound around the winding core of each stator core. It is a multilayer substrate in which a plurality of substrates are stacked. And the rotor 160 is inserted in the space | gap which protrusion part 198a, 192a opposes. That is, the upper stator plate 196a and the lower stator plate 190a are provided so as to sandwich a part of the outer peripheral region of the rotor 160 from both sides, leaving a magnetic gap.

FIG. 7 is an explanatory diagram of the excitation winding of the resolver 10 in the present embodiment.
FIG. 8 is an explanatory diagram of the output winding of the resolver 10 in the present embodiment.

  In the resolver 10 in the present embodiment, a plurality of substrates provided with a coil portion made of a spiral conductive layer oriented in the direction shown in FIGS. A coil portion as an excitation winding and a coil portion as an output winding are provided on any of the multilayer substrates constituting the support substrate 180. 7 and 8 schematically show one substrate constituting the multilayer substrate.

  According to this embodiment having the above-described configuration, the diameter of the outer contour line of the rotor has a shape that periodically changes, and is inserted into the gap between the upper stator plate and the lower stator plate of the stator core. For this reason, when the rotor rotates, the overlapping area (degree of electromagnetic coupling) of the rotor and the stator core in the top view changes, the magnetic flux passing through the magnetic path formed in the stator 100 changes, and the output signal changes. Therefore, a configuration for changing the number of windings of the winding members of each stator core is not required, and the number of windings of the winding members of each stator core can be made constant. Furthermore, the winding ratio of the excitation winding and the output winding can be adjusted by the number of stacked substrates constituting the support substrate 180.

  Moreover, according to this embodiment, since the rotation angle detection device can be a flat structure, the degree of freedom in mounting the rotation angle detection device can be increased.

  Further, in such a configuration, by rotating the rotor 160, the magnetic flux passing through the magnetic path formed in the stator 100 can be easily concentrated on the protrusions 198a and 192a, and the leakage of the magnetic flux can be reduced. it can. Therefore, the detection accuracy of the rotation angle can be further improved.

  In the resolver having the above-described configuration, in this embodiment, the stator cores 162a, 162b, 162c, and 162d of the stator 100 are arranged at positions corresponding to the shaft angle multiplier with respect to the rotor 160 that is rotatably provided. In this way, even if the shaft multiplication angle is increased, the stator core can be arranged so as to be easily mounted without reducing the detection accuracy.

  More specifically, the first and second stator core pairs included in the stator 100 are the degree of electromagnetic coupling (electromagnetic coupling area) between one stator core and the rotor 160 constituting each of the first and second stator core pairs. ) Is the maximum, the degree of electromagnetic coupling (electromagnetic coupling area) between the other stator core constituting each stator core pair and the rotor 160 is minimum, and the second is output when the absolute value of the output voltage of the first stator core pair is maximum. The stator core pair is arranged in the stator 100 so that the output voltage of the stator core pair becomes zero. Then, the electromagnetic coupling area between the stator core constituting the stator 100 and the rotor 160 is changed by the rotation of the rotor 160 about the rotation axis.

  For example, when the first stator core pair is the stator cores 162a and 162c in FIG. 1 and the second stator core pair is the stator cores 162b and 162d in FIG. 1, the first and second stator core pairs constitute the first stator core pair. When the electromagnetic coupling area between one stator core (for example, the stator core 162a) and the rotor 160 is maximum, the electromagnetic coupling area between the other stator core (for example, the stator core 162c) constituting the first stator core pair and the rotor 160 is minimized, When the electromagnetic coupling area between one stator core (for example, the stator core 162b) constituting the second stator core pair and the rotor 160 is maximum, the other stator core (for example, the stator core 162d) constituting the second stator core pair and the rotor 160 The electromagnetic coupling area is minimized and the The absolute value of the stator core pair of output voltage are arranged in the stator 100 so that the output voltage of the second stator core pairs at the maximum becomes zero.

  In accordance with the rotation of the rotor 160, the degree of electromagnetic coupling between the rotor 160 and each stator core changes, and for example, the output voltage of each stator core pair changes in a sine wave shape. By doing so, the output signal can be taken out from the stator core arranged according to the shaft angle multiplier, so that the cost of the resolver 10 can be reduced. In addition, since the output signal can be extracted from the output winding according to the position of the stator core while keeping the number of windings of the winding cores of the stator core all the same, the cost of the resolver 10 can be further reduced. .

  Furthermore, since the winding of each winding magnetic core can be realized at low cost with a sheet-like coil with a uniform winding state, it is possible to easily realize low cost of the resolver and high precision detection accuracy. Become. Furthermore, even if the shaft multiplication angle is increased, the resolver structure can be a flat structure, and it is possible to provide a resolver capable of reducing the cost and improving the detection accuracy regardless of the shaft multiplication angle.

FIG. 9 shows an arrangement example of the stator cores according to the shaft angle multiplier in the present embodiment. FIG. 9 shows the arrangement of the rotor and two pairs of stator cores in a top view. FIG. 9 shows an example of the arrangement of the stator cores when the shaft angle multiplier is “2” to “10” and the parameter k is “1”, “3”, “5”. It is not limited to what is shown.
FIG. 10 is an explanatory diagram of the rotor period, the stator arrangement angle, and the stator core angle in the arrangement example of FIG. FIG. 10 shows an example in which the shaft angle multiplier is “4” and the parameter k is “3”.

  9, the shaft angle multiplier corresponds to the change cycle of the diameter of the outer contour of the rotor 160. When the shaft angle multiplier is “N”, the rotor cycle in FIG. 9 is 360 / N. For example, as shown in FIG. 9, when the shaft angle multiplier is “2”, the rotor cycle is 180 (= 360/2) degrees, and when the shaft angle multiplier is “4”, the rotor cycle is 90 (= 360/4) degrees. When the shaft angle multiplier is “8”, the rotor cycle is 45 (= 360/8) degrees. Thus, the rotor chevron is formed around the rotation axis 280 of the rotor in the rotor cycle.

  The stator arrangement angle represents angles α1 and α2 at which the two stator cores constituting the stator core pair are arranged around the rotation axis 280 of the rotor 160. In FIG. 10, the value of α1 is equal to the value of α2. The angles α1 and α2 can be said to be angles formed by radii that bisect the stator core that passes through the rotation shaft 280, respectively.

  Here, the stator core arrangement angle is (360 k / 2N) (k is an odd number smaller than 2N). That is, the two stator cores constituting each pair of stator cores are spaced apart (360 k / 2N) degrees in the first rotational direction along the circumference centered on the rotation shaft 280 of the rotor 160. It is desirable that the stator core arrangement angle does not exceed 180 degrees.

  For example, as shown in FIG. 9, when the shaft angle multiplier is “4” and the parameter k is “3”, the two stator cores (for example, the stator cores 162a and 162c) constituting each stator core pair are 135 (= 360 × 3 / (2 × 4)) apart. That is, the stator core arrangement angle is 135 degrees, each of the stator cores 162a and 162c is arranged, and each of the stator cores 162b and 162d is arranged.

  Similarly, for example, as shown in FIG. 9, when the shaft angle multiplier is “7” and the parameter k is “5”, the two stator cores (for example, the stator cores 162a and 162c) constituting each stator core pair are 128.57 ( ≈360 × 5 / (2 × 7)) degrees apart. That is, the stator core arrangement angle is 128.57 degrees, the stator cores 162a and 162c are arranged, and the stator cores 162b and 162d are arranged.

  Furthermore, in FIG. 9, the stator core angle indicates the center angle β of each stator core. In the present embodiment, the stator core has a shape obtained by cutting an arc shape having a given radius on the rotating shaft 280 side from an arc shape having a central angle β around the rotating shaft 280 of the rotor 160 in a top view.

  As described above, by arranging the starter core according to the shaft angle multiplier of the rotor 160, when the electromagnetic coupling area between one stator core (for example, the stator core 162a) constituting the first stator core pair and the rotor 160 is the maximum, the first The electromagnetic coupling area between the other stator core (for example, the stator core 162c) constituting one stator core pair and the rotor 160 is minimized, and the electromagnetic coupling between the one stator core (for example, the stator core 162b) constituting the second stator core pair and the rotor 160 is minimized. The arrangement of the stator cores can be easily realized so that the electromagnetic coupling area between the other stator core (for example, the stator core 162d) constituting the second stator core pair and the rotor 160 is minimized when the area is the maximum.

  Furthermore, by arranging the stator cores as shown in FIG. 9, the stator cores are arranged so that the output voltage of the second stator core pair becomes zero when the absolute value of the output voltage of the first stator core pair is maximum. The

  FIG. 11 is an explanatory diagram of the output voltage of each stator core pair. In FIG. 11, the horizontal axis is a so-called electrical angle, and the vertical axis is amplitude (voltage).

  When the first stator core pair is configured by, for example, stator cores 162a and 162c, and the second stator core pair is configured by, for example, stator cores 162b and 162d, the first phase output signal of the two-phase output signals is the stator core 162a. , 162c, and the second phase output signal is output as a voltage between the output windings of the stator cores 162b, 162d. The output signal of the first phase changes like a waveform SIG1 in FIG. 11 according to the electrical angle, and the output signal of the second phase changes like the waveform SIG2 of FIG. 11 according to the electrical angle. That is, the output signal of the first phase and the output signal of the second phase are signals that are out of phase by 90 degrees, and the rotor 160 with respect to the stator 100 according to the difference in amplitude between the output signals of the first phase and the second phase. The rotation angle θ can be detected. Therefore, the greater the difference between the first phase output signal and the second phase output signal, the more accurately the rotation angle θ can be specified.

  Therefore, by arranging the stator core as shown in FIG. 9, as shown in FIG. 11, the difference between the output signal of the first phase and the output signal of the second phase becomes the maximum value MX. The output signal can be taken out. As a result, the detection accuracy of the rotation angle of the resolver 10 can be maximized.

  More specifically, each pair of stator cores 162a, 162b, 162c, which constitute the first and second stator core pairs, so that output signals of electrical angles of 0 degrees, 90 degrees, 180 degrees, and 270 degrees are obtained. 162d is arranged. In other words, in the present embodiment, each pair of stator cores 162a, 162b, 162c, and 162d constituting the first and second stator core pairs is located at a position corresponding to a mechanical angle at which an output signal having a desired electrical angle is obtained by the shaft multiplication angle. Is placed. In other words, the stator cores constituting each stator core pair are arranged at the above-described stator core arrangement angle, and one stator core constituting the first stator core pair and one stator core constituting the second stator core pair are a rotor. 160 (160 k / 4N + (360 m / N)) (k is an odd number smaller than 2N, m is an integer greater than or equal to 0) in the first rotational direction along a circumference centered on 160 rotation axes 280 Is done. In addition, (360k / 4N + (360m / N)) is an angle not exceeding 360 degrees.

  For example, when the shaft angle multiplier is “4” and the parameter k is “3”, one stator core (for example, the stator core 162a) constituting the first stator core pair (for example, the stator cores 162a and 162c) and the second stator core pair (for example, for example) One stator core (for example, the stator core 162b) constituting the stator cores 162b and 162d) is 67 in the first rotation direction (clockwise or counterclockwise) along the circumference around the rotation shaft 280 of the rotor 160. .5 (= 360 × 3 / (4 × 4) + 360 × 0/4) degrees (m = 0).

  Further, for example, when the shaft angle multiplier is “8” and the parameter k is “1”, one stator core (for example, the stator core 162a) constituting the first stator core pair (for example, the stator cores 162a and 162c) and the second stator core pair (for example, For example, one stator core (for example, the stator core 162b) constituting the stator cores 162b and 162d) is 11.25 (= 360 × 1) in the first rotation direction along the circumference around the rotation axis 280 of the rotor 160. / (4 × 8) + 360 × 0/8) degrees (m = 0).

  12 (a), 12 (b), and 12 (c) are explanatory diagrams of the parameter k in FIG. FIG. 12A shows an example of a two-phase output signal with the vertical axis representing amplitude and the horizontal axis representing mechanical angle. FIG. 12B is an explanatory diagram of the stator arrangement angle when the vertical axis indicates the amplitude, the horizontal axis indicates the mechanical angle, and the parameter k is “1”. FIG. 12C illustrates the stator arrangement angle when the vertical axis indicates the amplitude, the horizontal axis indicates the mechanical angle, and the parameter k is “3”. FIGS. 12A to 12C show an example in which the shaft double angle is “4”, but the same applies to other shaft double angles.

  In order to extract a two-phase output signal as shown in FIG. 12A, the arrangement positions of the stator cores 162a, 162b, 162c, and 162d may be determined based on the mechanical angle of “0” degrees. For example, when the parameter k is “1”, the absolute value of the amplitude of one output signal is maximum and the other output signal is zero at a mechanical angle of 45 degrees. Therefore, the stator core pair for taking out the output signal of the first phase is arranged so that the mechanical angle becomes 45 degrees, and the second is set so that the mechanical angle becomes 45 degrees with reference to 22.5 degrees which is a half thereof. A stator core pair for taking out two-phase output signals is arranged.

  For example, when the parameter k is “3”, the absolute value of the amplitude of one output signal is maximum and the other output signal is zero at a mechanical angle of 135 degrees. Therefore, a stator core pair for taking out the output signal of the first phase is arranged so that the mechanical angle becomes 135 degrees, and the first half of the stator core pair is 67.5 degrees, so that the mechanical angle becomes 135 degrees. A stator core pair for taking out two-phase output signals is arranged.

  Here, if the parameter k is an even number, the outputs of the respective phases coincide with each other, and the output signal cannot be accurately detected according to the rotation angle θ as described above. Therefore, it is desirable that the parameter k is an odd number. Thus, the parameter k is an element that determines the arrangement position of the stator core from which an output signal with similar detection accuracy can be obtained.

  In FIG. 12, the parameter k when the shaft angle multiplier is “4” has been described. However, even with other shaft angle multipliers, the parameter k can be a value that specifies the arrangement position of the stator core as in FIG. .

  Further, in the present embodiment, when N, which is a shaft multiple, is equal to or greater than “3”, the stator core angle of each stator core constituting each of the first and second stator core pairs is based on the rotation axis of the rotor ( 180 / N) degrees, and the two stator cores constituting each stator core pair are spaced apart by an angle smaller than 180 degrees in the first rotation direction along the circumference around the rotation axis of the rotor. It is desirable. By doing so, as shown in FIG. 9, the stator core is arranged to be biased to a part of the periphery of the rotor. Therefore, when incorporating the rotor in the manufacturing process, there are no restrictions on the manufacturing process. It can be inserted. Thereby, the freedom degree of a manufacturing process becomes high and it becomes possible to aim at the cost reduction of a manufacturing process.

  FIG. 13 schematically shows a part of the manufacturing process of the resolver in the present embodiment. FIG. 13 shows an example in which a rotor having a shaft angle multiplier of “4” and a parameter k of “3” is inserted from the lateral direction of the resolver. In FIG. 13, the same parts as those in FIG. 1 or FIG.

  As shown in FIG. 13, the stator core angle of each stator core (162a, 162b, 162c, 162d) constituting each stator core pair of the first and second stator core pairs is 45 (= 180/180) based on the rotation axis of the rotor. 4) Degree. Accordingly, since the stator core is arranged to be biased to a part of the periphery of the rotor, it is possible to employ a manufacturing process in which the rotor is inserted from the lateral direction.

  FIG. 14 schematically shows a part of a process for manufacturing another resolver in the present embodiment. FIG. 14 shows an example in which a rotor having a shaft angle multiplier of “8” and a parameter k of “5” is inserted from the lateral direction of the resolver.

  As shown in FIG. 14, when the shaft angle multiplier is “8” and the parameter k is “5”, the resolver is fixed to the support 310 and the stator cores 320a, 320b, 320c, and 320d that constitute the first and second stator core pairs. And a rotor 300. The rotor 300 has a shape in which the diameter of the outer diameter contour line changes in eight cycles in a top view, and has eight chevron portions (projections) that project with respect to a reference line (not shown) having a constant diameter. The stator core angle of each stator core constituting each stator core pair of the first and second stator core pairs is 22.5 (= 180/8) degrees with respect to the rotation axis of the rotor 300. For example, the stator core angle is set by the stator cores 320a and 320c. One stator core pair is formed, and the stator cores 320b and 320d form a second stator core pair.

  Outside the stator core 320a, a coil portion 322a is provided as a sheet-like coil portion wound around the outside of the winding core. On the outside of the stator core 320b, a coil portion 322b is provided as a sheet-like coil portion wound around the outside of the winding core. On the outside of the stator core 320c, a coil portion 322c is provided as a sheet-like coil portion wound around the outside of the winding core. On the outside of the stator core 320d, a coil portion 322d is provided as a sheet-like coil portion wound around the outside of the winding core.

  In the first and second stator core pairs constituted by the stator cores 320a, 320c, 320d, and 320d, the respective stator cores are arranged apart from each other by a stator core arrangement angle shown in FIG. 9, for example, the stator cores 320a and 320b are The stator cores are arranged at a distance of half of the arrangement angle of the stator cores.

  Therefore, as shown in FIG. 14, the stator core angle of each stator core (320a, 320b, 320c, 320d) constituting each stator core pair of the first and second stator core pairs is 22.5 based on the rotation axis of the rotor. (= 180/8) degrees. Accordingly, since the stator core is arranged to be biased to a part of the periphery of the rotor, it is possible to employ a manufacturing process in which the rotor is inserted from the lateral direction.

  As described above, as shown in FIGS. 13 and 14, when the shaft angle multiplier is “N”, the stator core angle is (180 / N), and the two stator cores constituting each stator core pair are rotated with the rotor. The stator core is disposed within a predetermined angular range of the circumference around the rotation axis of the rotor because the first rotation direction is spaced apart by an angle smaller than 180 degrees along the circumference around the axis. Disappear. Accordingly, the rotor can be easily inserted from the lateral direction without disturbing the stator core in the manufacturing process. As a result, the degree of freedom in the manufacturing process is increased, and the cost of the manufacturing process can be reduced.

  As described above, according to the resolver in the present embodiment, the number of windings of the winding members of each stator core can be easily adjusted, and the number of windings of the winding members of each stator core can be made constant. The cost of the resolver can be reduced. Furthermore, even if the shaft multiplication angle is increased, the excitation winding and the output winding can be easily mounted, and the resolver detection accuracy can be increased.

  The angle detection device having a resolver in the present embodiment can output digital data corresponding to the rotation angle based on a two-phase output signal from the resolver.

  FIG. 15 is a functional block diagram illustrating a configuration example of the angle detection device according to the present embodiment.

  An angle detection device 600 in the present embodiment includes the resolver 10 and an R / D converter (converter or conversion device in a broad sense) 500. The resolver 10 includes a stator and a rotor provided to be rotatable with respect to the stator, and in a state excited by one-phase excitation signals R1 and R2, a two-phase output corresponding to the rotation angle of the rotor with respect to the stator. Signals S1-S4 are output. The R / D converter 500 generates excitation signals R1 and R2 for the resolver 10, and also generates digital signals corresponding to the two-phase output signals S1 to S4 from the resolver 10, and outputs them as serial data or parallel data. .

  FIG. 16 shows a functional block diagram of the R / D converter 500 of FIG.

  The R / D converter 500 includes a differential amplifier DIF1, DIF2, multipliers MUL1 to MUL3, an adder ADD1, a loop filter 502, a bipolar VCO (Voltage Controlled Oscillator) 504, an up / down counter 506, a read only memory (Read Only Memory). 508, digital-analog converters DAC1 and DAC2, output processing circuit 510, and signal generation circuit 512.

The signal generation circuit 512 generates excitation signals R1 and R2 and outputs excitation signals E _{R1 to R2} for the resolver 10. In the following equation, V _E is an amplitude voltage, ω ₀ is a frequency, and t is time.

In the state exemplified by such an excitation signal, the resolver 10 outputs a two-phase output signal corresponding to the rotation angle θ (t). Of the two-phase output signals, the difference E _S1 -S3 between the output signals S1 and S3 is expressed by the following equation. Further, of the two-phase output signals, the difference E _S2 -S4 between the output signals S2 and S4 is expressed by the following equation. In the following equation, L is a transformation ratio.

The differential amplifier DIF1 amplifies the difference between the first-phase output signals S1 and S3 from the resolver 10 and outputs the amplified signal ES1 _-S3 . The differential amplifier DIF2 amplifies the difference between the second-phase output signals S2 and S4 from the resolver 10 and outputs the amplified signal ES2 _-S4 .

The ROM 508 stores the digital values of the sin signal and the cos signal corresponding to an arbitrary angle φ (t), and the digital-analog converter DAC1 outputs the analog value of the sin signal corresponding to the angle φ (t). The digital-analog converter DAC2 outputs an analog value of the cos signal corresponding to the angle φ (t). Accordingly, the multipliers MUL1 and MUL2 output signals V1 and V2 as shown in the following equations, respectively.

Then, the adder ADD1 generates a signal V3 (= V1-V2) using the signals V1, V2 generated by the multipliers MUL1, MUL2. As a result, the adder ADD1 outputs a signal V3 as shown in the following equation. In the following formula, it is converted to "sinω ₀ t" to _{"-cos (ω 0 t + π /} 2) ".

Next, the signal V3 is subjected to synchronous detection using the multiplier MUL3. The synchronous detection generates a signal V4 obtained by multiplying the signal V3 by cos (ω ₀ t + π / 2) generated by the signal generation circuit 512. The signal V4 is expressed as follows:

The loop filter 502 outputs a signal V5 obtained by cutting the high frequency component of the signal V4. As a result, the signal V5 is expressed by the following equation as a result of the cos term being cut as a high frequency component in the above equation.

  Bipolar VCO 504 outputs a pulse signal having a frequency proportional to the absolute value of signal V5, which is an output signal of loop filter 502, and a polarity signal corresponding to the polarity of signal V5. The up / down counter 506 performs an up-count during the active period of the pulse signal when the polarity signal from the bipolar VCO 504 indicates a positive polarity, and the active period of the pulse signal when the polarity signal from the bipolar VCO 504 indicates a negative polarity. Count down. The count value of the up / down counter 506 is a digital value of the angle φ (t).

  As described above, the ROM 508 outputs the digital value of the sin signal and the digital value of the cos signal according to the angle φ (t). By utilizing the fact that the angle φ (t) changes in accordance with θ (t) in this way, the output processing circuit 510 uses a serial value in which the digital value (digital signal) of the angle φ (t) is synchronized with the serial clock SCK. Output as data or output as parallel data.

  As described above, the serial data or parallel data, which is the output value of the R / D converter 500, is output to the subsequent processing circuit, which performs processing corresponding to the serial data or parallel data from the resolver 10. By executing, it becomes possible to realize processing according to the rotation angle of the rotor with respect to the stator.

  Note that the present invention is not limited to the configuration and processing contents of the R / D converter 500. The R / D converter according to the present invention only needs to convert a signal from the resolver 10 into a digital signal (digital value).

  In the above-described embodiment, an example in which two stator cores are brought close to each other is described assuming that m is “0”, but the present invention is not limited to this.

  FIG. 17 shows an example of the arrangement of the stator cores according to the shaft angle multiplier in the modification of the present embodiment. FIG. 17 shows the arrangement of the rotor and the two pairs of stator cores in a top view as in FIG. FIG. 17 shows an example of the arrangement of the stator core when the shaft angle multiplier is “2” to “10” and the parameter k is “1”, “3”, “5”. It is not limited to what is shown.

  The arrangement example in the present modification example shown in FIG. 17 differs from the arrangement example in the present embodiment example shown in FIG. 9 in that the first and second parameters k are “1” and the shaft angle multiplier N is “3” to “10”. It is arrangement | positioning of a 2nd stator core pair. That is, in the present modification, for example, the second stator core pair of the first and second stator core pairs is shifted by 360 / N degrees in the first rotation direction around the rotation axis of the rotor.

  For example, when the parameter k is “1” and the shaft angle multiplier N is “3”, the second stator core pair of the first and second stator core pairs is moved in the first rotation direction around the rotation axis of the rotor. They are shifted by 120 degrees (= 360/3) degrees. As a result, one stator core constituting the first stator core pair and one stator core constituting the second stator core pair are arranged in the first rotational direction along the circumference around the rotation axis 280 of the rotor 160. They are arranged so as to be 150 (= 360 × 1 / (4 × 3) + (360 × 1/3)) degrees (m = 1) apart.

  Further, for example, when the parameter k is “1” and the shaft angle multiplier N is “4”, the second stator core pair of the first and second stator core pairs is set to the first rotation direction around the rotation axis of the rotor. Are shifted by 90 degrees (= 360/4) degrees. As a result, one stator core constituting the first stator core pair and one stator core constituting the second stator core pair are arranged in the first rotational direction along the circumference around the rotation axis 280 of the rotor 160. 112.5 (= 360 × 1 / (4 × 4) + (360 × 1/4)) degrees (m = 1) apart from each other.

  Further, for example, when the parameter k is “1” and the shaft angle multiplier N is “8”, the second stator core pair of the first and second stator core pairs is changed to the first rotation direction around the rotation axis of the rotor. Are shifted by 45 degrees (= 360/8) degrees. As a result, one stator core constituting the first stator core pair and one stator core constituting the second stator core pair are arranged in the first rotational direction along the circumference around the rotation axis 280 of the rotor 160. 56.25 (= 360 × 1 / (4 × 8) + (360 × 1/8)) degrees (m = 1).

  That is, one stator core constituting the first stator core pair and one stator core constituting the second stator core pair are arranged in the first rotational direction along the circumference around the rotation axis 280 of the rotor 160 ( 360 k / 4N + (360 × 1 / N)) degrees (m = 1).

  As a result, the second stator core pair arranged in a shifted manner is electromagnetically coupled with the same electromagnetic coupling area in the chevron adjacent to the chevron before shifting of the rotor. Therefore, when the electromagnetic coupling area between one stator core (for example, the stator core 162a) constituting the first stator core pair and the rotor 160 is maximum, the other stator core (for example, the stator core 162c) and the rotor 160 constituting the first stator core pair. And the other stator core that constitutes the second stator core pair when the electromagnetic coupling area between one stator core (for example, the stator core 162b) constituting the second stator core pair and the rotor 160 is maximized. For example, the arrangement of each stator core is realized so that the electromagnetic coupling area between the stator core 162d) and the rotor 160 is minimized.

  In FIG. 9, it may be difficult to form the windings of the respective stator cores due to the proximity of the two stator cores. In this modification, in addition to the effects of the present embodiment, the windings of the respective stator cores. It becomes possible to obtain the effect that the formation of can be facilitated.

  In the present modification, an example in which m is “1” has been described, but the same applies even if m is “2” or more. The value of m may be appropriately selected according to the degree of freedom of the resolver manufacturing process, the ease of attaching the winding member of the stator core, the arrangement status of the stator cores constituting the first and second stator core pairs, and the like. .

  As described above, the resolver and the angle detection device according to the present invention have been described based on the above embodiment, but the present invention is not limited to this, and can be implemented without departing from the scope of the present invention. For example, the following modifications are possible.

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

  (2) The resolver in the above embodiment or the modification thereof sandwiches both surfaces of the rotor with the stator core so that the area where the stator core and the rotor overlap in the top view changes due to the rotation of the rotor. Although the output signal has been described as changing, the present invention is not limited to this. For example, the present invention can be applied to a resolver in which a gap between the rotor surface and the stator surface is changed by rotation of the rotor, and an output signal is changed in accordance with the change in the gap.

The perspective view of the structural example of the resolver in embodiment which concerns on this invention. The top view of the resolver in this embodiment. FIG. 3A and FIG. 3B are diagrams showing examples of top views of the rotor in the present embodiment. The perspective view of the stator core in this embodiment. FIG. 5 is another perspective view of the stator core of FIG. 4. The figure which shows the AA line cross section of FIG. 5 typically. Explanatory drawing of the exciting winding of the resolver in this embodiment. Explanatory drawing of the output winding of the resolver in this embodiment Explanatory drawing showing the example of arrangement | positioning of the stator core according to a shaft angle multiplier in this embodiment. Explanatory drawing of the rotor period, stator arrangement | positioning angle, and stator core angle in the example of arrangement | positioning of FIG. Explanatory drawing of the output voltage of each stator core pair. 12 (a), 12 (b), and 12 (c) are explanatory diagrams of the parameter k in FIG. The figure which shows typically a part of manufacturing process of the resolver in this embodiment. The figure which shows typically a part of manufacturing process of the other resolver in this embodiment. The functional block diagram of the structural example of the angle detection apparatus in this embodiment. The functional block diagram of the R / D converter of FIG. Explanatory drawing showing the example of arrangement | positioning of the stator core according to the shaft multiplication angle in the modification of this embodiment. FIG. 18A shows a structure of a conventional resolver. FIG. 18B is a diagram showing an output voltage from a conventional resolver. FIG. 19A shows a structure of a conventional resolver. FIG. 19B is a view for explaining the winding structure in each slot of the conventional resolver.

Explanation of symbols

10 ... Resolver, 100 ... Stator, 160, 160 ', 300 ... Rotor,
162a, 162b, 162c, 162d, 320a, 320b, 320c, 320d ... stator core,
172a, 172b, 172c, 172d, 322a, 322b, 322c, 322d ... coil part,
180 ... support substrate, 190a ... lower stator plate, 192a, 198a ... projection,
194a ... winding magnetic core, 196a ... upper stator plate, 200, 310 ... support,
220 ... mounting hole, 500 ... R / D converter, 502 ... loop filter,
504 ... Bipolar VCO, 506 ... Up / down counter, 508 ... ROM,
510 ... Output processing circuit, 512 ... Signal generation circuit, 600 ... Angle detection device,
ADD1 ... adder, DAC1, DAC2 ... digital / analog converter,
DIF1, DIF2 ... differential amplifier, MUL1, MUL2, MUL3 ... multiplier

Claims (9)

A stator having first and second stator core pairs each composed of a stator core with a winding member;
A rotor provided rotatably with respect to the stator and having a diameter of an outer contour line that changes in a cycle of N (N is a natural number),
The first and second stator core pairs are:
When the degree of electromagnetic coupling between one stator core constituting each stator core pair of the first and second stator core pairs and the rotor is maximum, the degree of electromagnetic coupling between the other stator core constituting each stator core pair and the rotor is Arranged so that the output voltage of the second stator core pair becomes zero when the absolute value of the output voltage of the first stator core pair is the minimum and the maximum
A resolver, wherein a degree of electromagnetic coupling between a stator core constituting the stator and the rotor is changed by rotation around a rotation axis of the rotor. In claim 1,
A resolver, wherein N is 2 or more. In claim 1 or 2,
The two stator cores constituting each pair of stator cores are spaced apart by (360 k / 2N) (k is an odd number smaller than 2N) in the first rotational direction along the circumference centered on the rotation axis. A resolver characterized by. In any one of Claims 1 thru | or 3,
One stator core constituting the first stator core pair and one stator core constituting the second stator core pair are arranged in the first rotational direction along the circumference centering on the rotational axis (360 k / 4N + (360 m / N)) (k is an odd number smaller than 2N, m is an integer equal to or greater than 0), and the resolvers are spaced apart. In any one of Claims 1 thru | or 4,
A resolver characterized in that the number of windings of the winding members of each of the stator core pairs is the same. In any one of Claims 1 thru | or 5,
When N is 3 or more, the stator core angle of each stator core constituting each stator core pair is (180 / N) degrees around the rotation axis, and the two stator cores constituting each stator core pair include the rotation axis A resolver, wherein the resolver is spaced apart by an angle smaller than 180 degrees in the first rotational direction along a circumference centered on the center. In any one of Claims 1 thru | or 6.
The stator core is
A resolver, wherein the resolver has a shape in which a circular arc portion having a given radius is cut away from the rotational axis from a sector shape having a stator core angle around the rotational axis as a central angle in a top view. In any one of Claims 1 thru | or 7,
Each stator core that constitutes each stator core pair,
An upper stator plate;
A lower stator plate,
The upper stator plate and the lower stator plate are connected, and a winding core around which the winding member consisting of an excitation winding and an output winding is wound is included.
The upper stator plate and the lower stator plate are
A resolver, characterized in that a part of the outer peripheral area of the rotor is sandwiched from both sides while leaving a magnetic gap. A resolver according to any one of claims 1 to 8;
An angle detection device comprising: a converter that outputs a digital signal corresponding to an output signal from a winding member of the resolver according to a rotation angle of the rotor with respect to the stator.

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