JP5244777B2 - Variable reluctance resolver - Google Patents

Description

The present invention relates to a variable reluctance resolver used for measurement or control of a rotation angle or a rotation position.

Conventionally, a variable reluctance (VR) type resolver used in this type of rotation angle detection device has a rotation angle formed by a stator having an exciting winding and an output winding wound around a magnetic pole, and a rotor having an arbitrary salient pole shape. In response to this, a two-phase signal of a SIN signal voltage and a COS signal voltage is output. An example of such a variable reluctance resolver is shown in FIG. In FIG. 10, the stator winding 101 is successively formed on each magnetic pole provided on the stator yoke 102 through a claw portion 103. The end portions of the stator winding 101 are connected to the connector portion 104 together. The salient pole of the rotor 105 is configured in a non-circular shape so that the gap permeance with the stator yoke 102 changes sinusoidally with respect to the rotation angle θ of the rotor 105. The shaft multiple angle in FIG. 10 is 7X. As described above, the variable reluctance type resolver shown in FIG. 10 is formed so that the salient poles of the stator yoke 102 protrude integrally inward, so that the exciting winding and the output winding are connected to the stator yoke 102 by an automatic winding machine. The workability in the process of winding around each salient pole is poor and the work efficiency is reduced. For this reason, a plurality of annular winding bobbin plates are provided at predetermined intervals via the winding plate-shaped thick portion with respect to the core of the ring-shaped yoke plate, and are arranged on the outer periphery of the winding plate-shaped thick portion. There has been proposed a rotation angle detection device that facilitates winding by winding the winding (see, for example, Patent Document 1).

  11 is an exploded explanatory view showing the rotation angle detection device disclosed in Patent Document 1, FIG. 12 is an exploded view of FIG. 11, and FIG. 13 is a winding configuration diagram of the bobbin of FIG.

As shown in FIG. 11, six annular bobbin plates having the same diameter as the annular yoke plate 220 with respect to a plurality of cores 214 (eight in FIG. 11) of the annular yoke plate 220 of the stator 201. A bobbin 210A composed of 210, 210a, 210b, 210c, 210d, and 210e is laminated in the axial direction or manufactured integrally, and the core 214 passes through each guide hole 230 of each of the bobbin plates 210 to 210e for ring winding. Yes. One surface of each ring-shaped winding bobbin plate 210-210e has a plate-like rectangular shape or an elliptical shape protruding along the axial direction (other non-true circles such as other rectangular shapes are also possible). Thick portions 231 are formed so as to protrude, and this winding plate-like thick portion 231 sets the intervals between the respective ring-shaped winding bobbin plates 210 to 210e to predetermined intervals. Windings are wound around the outer peripheral surface 232 of each plate-like thick portion 231 for winding, and since this outer peripheral surface 232 is located outside the guide hole 230, that is, the core 214, large winding can be achieved. It is configured. Excitation windings 204 and 204 ′ are wound around the annular winding bobbin plates 210 and 210a, and output windings 206, 206 ′, 207, and the annular winding bobbin plates 210b, 210c, 210d, and 210e, respectively. 207 ′ is wound, and the windings 204, 206, and 207 are wound through the outer side and the inner side of each core 214. With such a configuration, a plurality of annular winding bobbin plates are stacked on the annular yoke plate via the winding plate thick portion, and the winding is wound around the outer peripheral surface of the winding plate thick portion. Since the windings are very easy to wind, the winding time can be greatly reduced, automatic winding can be achieved, productivity can be greatly improved compared to conventional methods, and the rotor Since the pole plate faces the core, a variable reluctance resolver can be easily obtained.

JP 2004-69359 A

  However, the variable reluctance type resolver type rotation angle detection device of Patent Document 1 is provided with a plurality of cores 214 on the ring-shaped yoke plate 220, and the cores 214 are provided so that the magnetic pole plates 203 cooperate with each other. Therefore, the number of parts is increased, the number of assembling steps is increased, and the manufacturing cost of the rotation angle detecting device is increased.

The present invention has been made to solve the above-described problems, and has achieved a much simpler structure and easier assembly work than conventional variable reluctance resolvers, thereby reducing manufacturing costs. An object is to provide a variable reluctance resolver.

  In order to achieve the above object, the present invention includes a rotor and a stator including a plurality of excitation windings and a detection winding, and a gap permeance between the detection winding and the outer peripheral portion of the rotor is the rotor. In the variable reluctance resolver having an axial multiplication angle of nX (n is an arbitrary integer equal to or greater than 1) in which the outer peripheral shape of the rotor is formed so as to change sinusoidally with respect to the rotation angle of the plurality of excitation windings, The detection winding is formed in an annular shape around the rotation axis of the rotor, and the stator has a phase difference of 180 ° in terms of electrical angle between the input signals of the plurality of excitation windings. An excitation winding group consisting of a pair of annular windings having a salient pole part that forms a gap with the peripheral surface of the rotor, and partially covers the detection winding and the excitation winding group The rotor and the gear And a plurality of plate-like cores constituting a magnetic circuit together with the magnetic poles, and the salient pole portions are provided at different positions each with a mechanical angle of (90 ° / n) (n is an integer corresponding to the shaft multiple angle). Thus, the variable reluctance resolver is constituted by a plurality of divided stator portions arranged so as to overlap in the axial direction, and is arranged outside or inside the rotor.

According to a second aspect of the present invention, in the first aspect of the present invention, the salient pole portions in the plurality of divided stator portions are mechanical angles (180 ° / n) (n Are integers according to the shaft angle multiplier), and are formed so that a part of the detection winding and a part of each annular winding of the pair of excitation windings are alternately covered. It is a variable reluctance type resolver characterized by the above.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the rotor is a plate-like plate made of a magnetic material at a mechanical angle (360 ° / n) (n is a shaft angle multiplier). It is a variable reluctance type resolver characterized by being embedded at different positions.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein in each of the plurality of divided stator portions, the detection winding and the excitation winding group are bobbins. It is a variable reluctance type resolver that is wound around

  Moreover, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the detection winding is arranged with respect to the rotation shaft of the rotor in each of the plurality of divided stator portions. The variable reluctance resolver is characterized in that the exciting winding group is arranged on the inner side and the exciting winding group on the inner side.

  The invention according to claim 6 is the invention according to any one of claims 1 to 4, wherein, in each of the plurality of divided stator portions, the detection winding with respect to the rotation shaft of the rotor. The variable reluctance type resolver is characterized in that the exciting winding group is arranged on the outside and the excitation winding group is arranged on the outside.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the number of the detection windings in each of the plurality of divided stator portions is the same as the number of the excitation winding groups. It is a variable reluctance type resolver characterized by comprising the divided detection winding part.

  The invention according to claim 8 is the invention according to claim 7, wherein one excitation winding of the excitation winding group and the split detection winding portion arranged on the same plane in the radial direction are: It is a variable reluctance resolver that is wound around the same bobbin.

  The invention according to claim 9 is the invention according to claim 7 or 8, wherein the plurality of plate-like cores are one excitation winding of the excitation winding group arranged on the same plane in the radial direction. The variable reluctance resolver is formed so as to cover the split detection winding portion.

  The invention according to claim 10 is characterized in that, in the invention according to claim 7, the exciting winding group and the divided winding portion are arranged in an axial direction with respect to a rotating shaft of the rotor. It is a variable reluctance type resolver.

  It is possible to provide a variable reluctance resolver with a reduced manufacturing cost by achieving a much simpler structure and facilitating assembly work than a conventional variable reluctance resolver.

1 is a perspective view of a variable reluctance resolver according to an embodiment of the present invention. 1 is an exploded perspective view of a variable reluctance resolver according to an embodiment of the present invention. 1 is a cross-sectional perspective view of a variable reluctance resolver according to an embodiment of the present invention. It is a disassembled perspective view of the division | segmentation stator part by embodiment of this invention. It is explanatory drawing which shows the structure of the stator of the variable reluctance type resolver by embodiment of this invention, (a) is sectional drawing of a stator, (b) is a top view of a 1st division | segmentation stator part, (c) is 2nd It is a top view of the divided stator part. (A) It is a top view when two plate-shaped plates of the rotor by embodiment of this invention are embed | buried under the pole. (B) It is a top view when one plate-shaped plate of the rotor by embodiment of this invention is embed | buried with respect to the pole. (C) It is a top view when the plate-shaped plate of the rotor by 3rd Embodiment of this invention is embed | buried 3 with respect to the pole. (A) It is a top view of the 1st division | segmentation stator part explaining the principle of operation of the variable reluctance resolver by embodiment of this invention. (B) It is EE sectional drawing of Fig.7 (a). (C) It is an enlarged view of the broken-line part of FIG.7 (b). (A) It is a top view of the 1st division | segmentation stator part explaining the operation | movement principle of the variable reluctance type resolver by embodiment of this invention, FIG.7 (a) differs in the position of a rotor by 60 degrees with a mechanical angle. Yes. (B) It is FF sectional drawing of Fig.8 (a). (C) It is an enlarged view of the broken-line part of FIG.8 (b). (A) It is a schematic diagram of the 1st division | segmentation stator part and rotor of a variable reluctance type resolver by embodiment of this invention, (a) is a figure which shows 1st embodiment, (b)-(g) is others It is a figure which shows this embodiment. It is a block diagram which shows the conventional variable reluctance type resolver. It is a decomposition explanatory view showing a variable reluctance type resolver shown in patent documents 1. FIG. 12 is an exploded view of FIG. 11. FIG. 13 is a winding configuration diagram of the bobbin of FIG. 12.

Hereinafter, a variable reluctance resolver according to an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
1, 2, and 3 show a VR resolver having a 3 × axial multiplication angle, which is a variable reluctance (VR) resolver (hereinafter referred to as a VR resolver) according to an embodiment of the present invention. FIG. 2 is an exploded perspective view, and FIG. 3 is a sectional perspective view.

  As shown in FIGS. 1 and 2, the VR resolver 1 according to the present embodiment includes a stator 4 including a first split stator portion 2 and a second split stator portion 3, and a rotor 5. . The VR resolver 1 according to this embodiment is an inner rotor type in which the rotor 5 is disposed inside the stator 4.

Here, the structure and assembly method of the stator 4 will be described with reference to FIGS. 4 and 5.
FIG. 4 shows an exploded perspective view of the first split stator portion 2 and the second split stator portion 3.
In addition, since the 1st division | segmentation stator part 2 and the 2nd division | segmentation stator part 3 have the same component shape, both are shown using the same figure, The main of the 2nd division | segmentation stator part 3 is shown. The parts are quoted in parentheses.

(Construction)
The first split stator section 2 includes a first excitation winding assembly 14, a second excitation winding assembly 18, and a sin phase assembly 19 each having an excitation winding. The sin phase assembly 19 is obtained by winding a sin phase winding 19b around a first detection winding bobbin 19a in an annular shape. The first excitation winding assembly 14 and the second excitation winding assembly 18 form an excitation winding group.

The first excitation winding assembly 14 includes a first excitation core 12b in an annular shape on a first excitation core bobbin 12a and a first excitation core bobbin 12a. The second exciting winding assembly 18 includes a third plate-like core 15, a fourth plate-like core 17, and a second exciting-winding assembly 18. The exciting coil bobbin 16a is constituted by a second exciting coil part 16 in which a second exciting coil 16b is wound in an annular shape. The first excitation winding 12b and the second excitation winding 16b have opposite winding directions. For example, when the first excitation winding 12b is wound clockwise, The exciting winding 16b is wound counterclockwise. Each of the four plate-like cores (first plate-like core 11, second plate-like core 13, third plate-like core 15, and fourth plate-like core 17) is made of one sheet metal. ing.

The second split stator unit 3 includes a third excitation winding assembly 24, a fourth excitation winding assembly 28, and a cos phase assembly 29 each having an excitation winding. The cos phase assembly 29 is obtained by winding a cos phase winding 29b around a second detection winding bobbin 29a in an annular shape. The third excitation winding assembly 24 and the fourth excitation winding assembly 28 form an excitation winding group.

The third exciting winding assembly 24 includes a fifth exciting core 21, a sixth exciting core 23, and a third exciting winding bobbin 22 a and a third exciting winding 22 b in an annular shape. The fourth exciting winding assembly 28 includes a seventh exciting core assembly 25, an eighth exciting core 27, an eighth exciting core 27, and a fourth exciting winding assembly 28. The excitation coil bobbin 26a is constituted by a fourth excitation winding section 26 in which a fourth excitation winding 26b is wound in an annular shape. The third excitation winding 22b and the fourth excitation winding 26b have opposite winding directions. For example, when the third excitation winding 22b is wound clockwise, The excitation winding 16b is wound counterclockwise. Each of the four plate cores (fifth plate core 21, sixth plate core 23, seventh plate core 25, and eighth plate core 27) is made of one sheet metal. ing.

In addition, the 1st plate-shaped core 11 which the 1st division | segmentation stator part 2 has, the 3rd plate-shaped core 15, the 5th plate-shaped core 21 which the 2nd division | segmentation stator part 3 has, and the 7th plate shape The core 25 has the same part shape. Moreover, the 2nd plate-shaped core 13 which the 1st division | segmentation stator part 2 has, the 4th plate-shaped core 17, the 6th plate-shaped core 23 which the 2nd division | segmentation stator part 3 has, and 8th plate shape The core 27 also has the same part shape.

(Assembly method)
A method for assembling the first split stator portion 2 will be described.
The first excitation winding assembly 14 first fits the first excitation winding portion 12 into a substantially annular second plate-like core 13 having three salient pole portions 13a, 13b, 13c, and then The substantially plate-shaped first plate-like core 11 having three salient pole portions 11a, 11b, and 11c connected by the bridge portions 11d, 11e, and 11f, and the salient pole portions 11a, 11b, and 11c being the second ones. Assembling is performed by sandwiching and fixing the first exciting winding 12 so that the salient poles of the plate-like core 13 are shifted from each other by 60 ° in the circumferential direction.

Similarly, in the second exciting winding assembly 18, first, the second exciting winding portion 16 is fitted into a substantially ring-shaped fourth plate-shaped core 17 having three salient pole portions 17a, 17b, 17c. Next, the substantially annular third plate-like core 15 having the three salient pole portions 15a, 15b, and 15c connected by the bridge portions 15d, 15e, and 15f, and the salient pole portions 15a, 15b, and 15c, respectively. Assembling is performed by sandwiching and fixing the second exciting winding portion 16 so as to be shifted from the salient pole portion of the fourth plate-shaped core 17 by 60 ° in the circumferential direction.

Next, by sandwiching the sin phase assembly 19 from both the upper and lower sides by the first exciting winding assembly 14 and the second exciting winding assembly 18 and fixing them, the first split stator portion 2 is Complete. Here, the salient pole part of the first plate-like core 11 and the salient pole part of the fourth plate-like core 17 are in the same position in the axial direction as viewed from the direction of the arrow B (in other words, the same position in the circumferential direction). Fix to be.

Next, a method for assembling the second split stator portion 3 will be described.
The third exciting winding assembly 24 first fits the third exciting winding portion 22 into a substantially ring-shaped sixth plate-like core 23 having three salient pole portions 23a, 23b, 23c, and then The substantially annular fifth plate-like core 21 having three salient pole portions 21a, 21b, and 21c connected by the bridge portions 21d, 21e, and 21f, and the salient pole portions 21a, 21b, and 21c being the sixth Assembling is performed by sandwiching and fixing the third exciting winding portion 22 so that the salient pole portions of the plate-like core 23 are shifted from each other by 60 ° in the circumferential direction.

Similarly, in the fourth exciting winding assembly 28, first, the fourth exciting winding portion 26 is fitted into a substantially ring-shaped eighth plate core 27 having three salient pole portions 27a, 27b, 27c. Next, a seventh plate-shaped core 25 having a substantially ring shape having three salient pole portions 25a, 25b, and 25c connected by bridge portions 25d, 25e, and 25f, and salient pole portions 25a, 25b, and 25c, respectively. Assembling is performed by sandwiching and fixing the fourth exciting winding portion 26 so that the salient pole portions of the eighth plate-shaped core 27 are shifted from each other by 60 ° in the circumferential direction.

Next, the cosine phase assembly 29 is sandwiched from both the upper and lower sides by the third excitation winding assembly 24 and the fourth excitation winding assembly 28 and fixed to each other, whereby the second divided stator portion 3 is formed. Complete. Here, the salient pole part of the fifth plate-like core 21 and the salient pole part of the eighth plate-like core 27 are in the same position in the axial direction as viewed from the direction of the arrow B (in other words, the same position in the circumferential direction). Fix to be.

Next, a method for assembling the stator 4 will be described with reference to FIG.
5A is a cross-sectional view of the stator 4 viewed from the direction of arrow A in FIG. 3, FIG. 5B is a top view of the first split stator portion 2, and FIG. 5C is a second split stator. FIG. 6 is a top view of part 3.
When the first divided stator portion 2 and the second divided stator portion 3 are fixed in a stacked manner, they are fixed in a stacked manner at a position shifted by 30 ° (90 ° in electrical angle) in the circumferential direction. Specifically, as shown in FIGS. 5B and 5C, the salient pole portion 11b of the first split stator portion 2 and the salient pole portion 21b of the second split stator portion 3 are arranged in the circumferential direction. They are stacked at a position shifted by 30 °.

Next, the rotor 5 will be described.
As shown in FIG. 2, the rotor 5 has a structure in which a shaft (not shown) passes through the center of a columnar rotor yoke 6 made of a nonmagnetic material. The rotor yoke 6 is provided with an embedding hole in which a plate-like plate 7 made of a magnetic material can be embedded along the outer peripheral edge thereof. Specifically, a plurality of embedded holes extend in the axial direction of the rotor 5 along the outer peripheral edge of the rotor yoke 6. In the case of a shaft angle multiplier of 3X, there are three rotor poles, and the poles are (360 ° / (N = 3)) = 120 ° are provided at different positions, and the plate-like plates 7 are respectively inserted. In FIG. 2 and FIG. 6A, two plate-like plates 7 are embedded in each pole. The mounting angle of the two plate-like plates corresponding to the poles is such that a buried hole is provided at a point C where the vertical direction of the flat portion of the plate-like plate 7 is shifted outward from the center of the rotor. Insert. Further, as another embodiment, as shown in FIG. 6B, one plate-like plate 7 may be embedded in each pole. In this case, the mounting angle of the plate-like plate 7 is a plate-like shape. A buried hole is provided at a position where the vertical direction of the planar portion of the plate 7 is at the center of the rotor. Further, as shown in FIG. 6 (c), three plate-like plates 7 may be embedded in each pole. In this case, the mounting angle of the plate-like plate 7 located at the center is the plate-like plate. The embedding hole is provided at a position where the vertical direction of the plane portion 7 is at the center of the rotor. An embedding hole is provided so as to be at the position of the point D shifted from the outside. The outer shape of the plate-like plate needs to be the same length as the height of the rotor yoke 6, but the thickness and width of the plate-like plate, the mounting angle and position, and the number of plate-like plates attached to each pole are as follows. A plate-like plate is designed and arranged on the rotor yoke so as to be optimal as appropriate in accordance with the outer size of the VR resolver.

(Operating principle)
The operation principle of the VR resolver 1 having a shaft multiplication angle of 3 × according to the present embodiment will be described with reference to FIGS. 7 and 8. FIG. 7A is a top view of the first split stator portion 2, and one plate-like plate corresponding to each pole is inserted in the rotor. FIG. 7B is an EE cross-sectional view of FIG. 7A, and FIG. 7C is an enlarged view of a broken line portion of FIG. 7B. FIG. 8A is also a top view of the first split stator portion as in FIG. 7A, but is different from FIG. 7A in that the rotor position is shifted by 60 ° in the circumferential direction in terms of mechanical angle. Yes. 8B is a cross-sectional view taken along line FF in FIG. 8A, and FIG. 8C is an enlarged view of a broken line portion in FIG. 8B.

When the first excitation winding 12b and the second excitation winding 16b are energized, the voltage induced by the reactance change generated when the plate plate 7 of the rotor passes through the salient pole portion of the stator portion is the sin phase. Output from the winding 19b.

The magnetic flux detected by the sin phase winding 19b is obtained by combining the salient pole part of the first plate core and the salient pole part of the fourth plate core, and the salient pole part of the second plate core. When the plate plate 7 of the rotor passes through the surface where the salient pole portions of the third plate core are combined, a magnetic path is formed and generated. Specifically, as shown in FIG. 7C, a current flows in the first excitation winding 12b in a direction (cross) from the reader toward the paper surface, and in the second excitation winding 16b. When the plate-like plate 7 approaches in a state where a current flows in the direction (dot) from the back side of the page to the top of the page, the salient pole portion 11a of the first plate-like core 11 as indicated by an arrow in the figure. → rotor plate plate 7 → salient pole portion 17a of fourth plate core 17 → bridge portion 13d of second plate core 13 → flow through salient pole portion 11a of first plate core 11 A magnetic path is formed, and an electric current is generated in the sin phase winding 19b in a direction (dot) from the back side of the paper to the top of the paper. On the other hand, in FIG. 8C in which the rotor angle is shifted by 60 ° in the mechanical direction, the direction of the current flowing through the respective excitation windings 12b and 16b does not change, but the plate-like plate 7 approaches. Sometimes, as indicated by the arrow in the figure, the salient pole portion 15c of the third plate core 15 → the plate plate 7 of the rotor → the salient pole portion 13c of the second plate core 13 → the bridge of the fourth plate core 17. Since the magnetic path is formed by flowing along the path of the salient pole portion 15c of the third plate core 15 from the portion 17d, the current flows in the direction (dot) from the back side of the paper to the top of the paper surface in the sin phase winding 19b. Will occur. Thus, when the rotor rotates 60 °, the detection signal output from the sin phase winding 19b is inverted, and the detection signal with 120 ° as one cycle is output from the sin phase winding 19b.

In the cos phase winding (not shown), the same output as that of the sin phase winding can be obtained. However, the cos phase winding is fixed by being shifted from the sin phase winding by 30 ° in the circumferential direction. Different output voltages. Thereby, a two-phase signal of a sin phase and a cos phase can be output according to the rotation angle.

In the present embodiment, a VR resolver having a shaft angle multiplier of 3 × has been described. However, the present invention is not limited to this, and can be applied to a VR resolver having an arbitrary shaft angle multiplier. In this case, when the shaft angle multiplier is n times, the number of rotor poles is n, and an nX VR type resolver can be obtained by bonding the stator portions with a mechanical angle shifted by 90 ° / n. it can.

As described above, the VR type resolver according to the present embodiment has a structure in which both the excitation winding and the detection winding are wound around the annular bobbin, thereby facilitating the formation of the winding. Tact time can be shortened. Further, the conventional stator is formed by laminating (stacking) thin magnetic materials, but the VR type resolver according to the present embodiment is formed of simple sheet metal parts, so that assembly is easy. In addition, component costs and manufacturing costs can be reduced. In addition, the conventional rotor is formed by laminating (stacking) thin magnetic materials and providing convex poles. However, the VR resolver according to the present embodiment processes a nonmagnetic material into a cylindrical shape. Since a buried hole is provided and a magnetic material plate is inserted into the buried hole, assembly is easy, and material costs and manufacturing costs can be reduced.

(Other embodiments)
With reference to FIG. 9, another embodiment of the present invention will be described.
FIG. 9 is a diagram schematically showing a cross section of the first divided stator portion. FIG. 9A is a diagram in which the shaft multiplication angle according to the first embodiment is 3 × for comparison with other embodiments. FIG. 3 is a schematic diagram illustrating only a first divided stator portion and a rotor of the VR resolver 1. FIGS. 9B to 9E are schematic diagrams for explaining other embodiments, but only the first divided stator portion and the rotor are described as in FIG. 9A.

In FIG. 9A, the stator core 31 includes a salient pole portion 11 a of the first plate core 11, a salient pole portion 17 a of the fourth plate core 17, and a bridge portion 13 d of the second plate core 13. The stator core 32 has a salient pole portion 15c of the third plate core 15, a salient pole portion 13c of the second plate core 13, and a fourth plate core. An assembly of plate-like cores with a configuration including 17 bridge portions 17d. Further, the broken line portion of the rotor 36 is located at the apex of a substantially triangular plate when the shaft angle multiplier is 3X. Therefore, when the plate plate is on the left side of the drawing, the right side is hidden. The broken line part of a figure represents the position when a plate-shaped plate has rotated to the right side.
By energizing the first excitation winding 34 and the second excitation winding 35, a magnetic path is formed by the stator core 31, the stator core 32 and the plate plate 37 of the rotor, and is output to the sin phase winding 33. The
Hereinafter, although other embodiment is described, the stator core of each embodiment points out the aggregate | assembly of a plate-shaped core similarly to Fig.9 (a).

FIG. 9B shows a structure in which the sin phase winding 43 is arranged inside the excitation winding (the first excitation winding 44 and the second excitation winding 45). The stator core 41 covers the sin phase winding 43 and the first excitation winding 44, and forms a magnetic path with the plate plate 47 of the rotor. The stator core 42 covers the sin winding 43 and the second excitation winding 45 and forms a magnetic path with the plate plate 47 of the rotor. Even in this configuration, the same effect as the VR resolver 1 according to the first embodiment can be obtained.

In FIG. 9C, the sin phase winding is divided into two winding portions to form sin phase windings 53a and 53b (divided detection winding portions). The structure is shown outside the second excitation winding 55). The stator core 51 covers the sin phase windings 53a and 53b and the first excitation winding 54, and forms a magnetic path with the plate plate 57 of the rotor. The stator core 52 covers the sin-phase windings 53a and 53b and the second excitation winding 55, and forms a magnetic path with the plate plate 57 of the rotor. According to this configuration, the same effect as the VR resolver 1 according to the first embodiment can be obtained, and the lead wire from the excitation windings 54 and 55 can be connected to the sin phase by dividing the sin phase winding. Since it can be taken out between the windings 53a and 53b, the wiring can be easily routed.

FIG. 9D shows that the sin phase windings 63a and 63b (divided detection winding portions) divided into two are arranged outside the excitation winding (first excitation winding 64 and second excitation winding 65). The structure arranged in is shown. One side of the exciting winding and the sin phase winding arranged on the same plane is covered with the stator cores 61 and 62, and the stator cores 61 and 62 and the plate plate 67 of the rotor form a magnetic path. That is, the stator core 61 covers the sin phase winding 63a and the first excitation winding 64, and forms a magnetic path with the plate plate 67 of the rotor. The stator core 62 covers the sin phase winding 63b and the second excitation winding 65, and forms a magnetic path with the plate plate 67 of the rotor. According to this configuration, the same effect as the VR resolver 1 according to the first embodiment can be obtained. In the first embodiment, four plate-like cores are used in the first split stator portion 2. However, in this structure, between the sin-phase windings 63 a and 63 b and the excitation windings 64 and 65. Since the plate-like cores sandwiched between the two can be shared, the number of plate-like cores can be reduced to three. In the first embodiment, the sin phase winding is wound around the bobbin for the sin phase winding. However, after the excitation winding is wound, the sin phase winding is wound directly on the outer periphery of the excitation winding. Alternatively, the sin-phase winding bobbin and the excitation winding bobbin can be shared, and the wiring of the excitation winding and the sin-phase winding can be easily routed.

FIG. 9E shows that the sin phase windings 73a and 73b (divided detection winding portions) divided into two are arranged inside the excitation winding (first excitation winding 74 and second excitation winding 75). The excitation winding and the detection winding arranged on the same plane are covered with the stator cores 71 and 72, and a magnetic path is formed by the stator cores 71 and 72 and the plate plate 77 of the rotor. Yes. That is, the stator core 71 covers the sin phase winding 73a and the first exciting winding 74, and forms a magnetic path with the plate plate 77 of the rotor. The stator core 72 covers the sin phase winding 73b and the second exciting winding 75, and forms a magnetic path with the plate plate 77 of the rotor. Even in this configuration, the same effect as the configuration of FIG. 9D can be obtained.

FIG. 9 (f) shows the sin phase windings 83a and 83b (divided detection winding portion) and the excitation winding (first excitation winding 84 and second excitation winding 85) divided into two axes. It is a structure arranged in the direction. Specifically, in the axial direction, an excitation winding 84 is disposed on one side of the sin phase winding 83a, a sin phase winding 83b is disposed on the other side of the sin phase winding 83a, and the sin phase winding 83b An exciting winding 85 is arranged on the opposite side to the sin phase winding 83a. The stator core 81 covers the sin phase winding 83a and the first excitation winding 84, and forms a magnetic path with the plate plate 87 of the rotor. The stator core 82 covers the sin phase winding 83b and the second excitation winding 85, and forms a magnetic path with the plate plate 87 of the rotor. Even in this configuration, the same effect as the VR resolver 1 according to the first embodiment can be obtained, and the outer shape of the VR resolver can be reduced by arranging the excitation winding and the detection winding in the axial direction. Can do. Further, the number of plate-like cores can be reduced as in the configuration of FIG. In the first embodiment, the sin-phase winding is wound around the sin-phase winding bobbin. However, the sin-phase winding and the excitation winding may be wound around the same bobbin. And the sin-phase winding bobbin can be made common, and the excitation winding and the detection winding can be easily routed. The arrangement configuration of the excitation winding and the detection winding is not limited to the arrangement shown in FIG. 9F, and may be a configuration in which a sin phase winding is arranged outside the excitation winding.

FIG. 9G shows an outer rotor in which the sin phase winding 93 is arranged outside the excitation winding (first excitation winding 94, second excitation winding 95) and the rotor 96 is arranged outside the stator core. The type structure is shown. The stator core 91 covers the sin phase winding 93 and the first exciting winding 94 and forms a magnetic path with the plate plate 97 of the rotor. The stator core 92 covers the sin phase winding 93 and the second excitation winding 95, and forms a magnetic path with the plate plate 97 of the rotor. Even in this configuration, the same effect as the VR resolver 1 according to the first embodiment can be obtained.

As mentioned above, although this invention was demonstrated by preferable embodiment, this invention is not limited to embodiment mentioned above, A various deformation | transformation and application are possible within the range of the technical idea of this invention.
For example, the rotor configured in the above embodiment is formed of sheet metal, but is not limited thereto, and may be a rotor formed by stacking (stacking) conventional cores. Absent.

Further, the shape of the plate-shaped core is not limited to the present embodiment, and may be other shapes. For example, even if the salient pole portions 11a, 11b, and 11c are arranged independently, the portions that do not participate in the magnetic path such as the bridge portions 11d, 11e, and 11f in the first plate core are omitted. Good.

In the above embodiment, each winding is wound around a bobbin. However, the bobbin can be omitted by making each winding an air-core structure.

In the first embodiment, the excitation winding group is configured such that each winding is wound in the opposite direction. However, if the polarity of each signal is matched and input at the input portion of these signals, each winding is wound. There is no particular need to define the winding direction of the wire.

1: variable reluctance type resolver, 2: first divided stator portion, 3: second divided stator portion, 4: stator, 5: rotor, 6: rotor yoke, 7: plate plate, 11: first plate shape Core, 11a, 11b, 11c: salient pole part of first plate core, 11d, 11e, 11f: bridge part of first plate core, 12: first excitation winding part, 12a: first Bobbin for exciting winding, 12b: first exciting winding, 13: second plate core, 13a, 13b, 13c: salient pole part of second plate core, 13d, 13e, 13f: second Bridge portion of plate core, 14: first excitation winding assembly, 15: third plate core, 15a, 15b, 15c: salient pole portion of third plate core, 15d, 15e, 15f: Bridge portion of third plate core, 16: second excitation winding portion, 16a: second excitation Winding bobbin, 16b: second exciting winding, 17: fourth plate core, 17a, 17b, 17c: salient pole part of fourth plate core, 17d, 17e, 17f: fourth plate 18: second excitation winding assembly, 19: sin phase winding assembly, 19a: first bobbin for detection winding, 19b: sin phase winding, 21: fifth plate 21a, 21b, 21c: salient pole part of the fifth plate-like core, 21d, 21e, 21f: bridge part of the fifth plate-like core, 22: third excitation winding part, 22a: third Bobbin for excitation winding, 22b: third excitation winding, 23: sixth plate core, 23a, 23b, 23c: salient pole part of sixth plate core, 23d, 23e, 23f: sixth 24: third excitation winding assembly, 25: seventh plate core, 25a, 25b, 25c : Salient pole portion of seventh plate core, 25d, 25e, 25f: bridge portion of seventh plate core, 26: fourth excitation winding portion, 26a: fourth bobbin for excitation winding, 26b : Fourth excitation winding, 27: eighth plate core, 27a, 27b, 27c: salient pole portion of eighth plate core, 27d, 27e, 27f: bridge portion of eighth plate core, 28: Fourth excitation winding assembly, 29: Cos phase winding assembly, 29a: Second bobbin for detection winding, 29b: Cos phase winding, 31, 32, 41, 42, 51, 52, 61, 62, 71, 72, 81, 82, 91, 92: stator core, 33, 43, 93: detection winding, 53a, 53b, 63a, 63b, 73a, 73b, 83a, 83b: detection winding (divided winding) Line portion), 34, 44, 54, 64, 74, 84, 94: first excitation winding, 35, 5, 55, 65, 75, 85, 95: Second excitation winding, 36, 46, 56, 66, 76, 86, 96: Rotor, 37, 47, 57, 67, 77, 87, 97: Plate Plate

Claims (10)

A rotor and a stator including a plurality of excitation windings and detection windings, and a gap permeance between the detection windings and the outer periphery of the rotor is changed in a sinusoidal shape with respect to a rotation angle of the rotor. In the variable reluctance resolver having an axial multiplication angle nX (n is an arbitrary integer of 1 or more) at which the outer peripheral shape of the rotor is formed,
The plurality of excitation windings and the detection winding are formed in an annular shape around the rotation axis of the rotor,
The stator includes an excitation winding group consisting of a pair of annular windings having a phase difference of 180 ° in electrical angle among the plurality of excitation windings, a circumferential surface of the rotor, and a gap And a plurality of plate-shaped cores that partially cover the detection winding and the excitation winding group to form a magnetic circuit together with the rotor and the gap. It is composed of a plurality of divided stator portions arranged in an axial direction so that the salient pole portions are provided at different positions (90 ° / n) (n is an integer corresponding to a shaft angle multiplier) at each angle, A variable reluctance resolver, which is disposed outside or inside a rotor. The salient pole portions in the plurality of divided stator portions are formed at different positions by mechanical angles (180 ° / n) (n is an integer corresponding to a shaft angle multiplier) by a plurality of plate-shaped cores, 2. The variable reluctance resolver according to claim 1, wherein a part and a part of each of the annular windings of the pair of excitation windings are alternately covered.   3. The rotor according to claim 1, wherein the rotor is formed by embedding plate-like plates made of a magnetic material at different positions by a mechanical angle of (360 ° / n) (n is an integer corresponding to a shaft angle multiplier). Variable reluctance type resolver.   4. The variable reluctance type according to claim 1, wherein in each of the plurality of divided stator portions, the detection winding and the excitation winding group are wound around a bobbin. 5. Resolver.   5. In each of the plurality of divided stator portions, the detection winding is arranged outside and the excitation winding group is arranged inside the rotation axis of the rotor. The variable reluctance resolver according to one item.   In each of the plurality of divided stator portions, the detection winding is arranged on the inner side and the excitation winding group is arranged on the outer side with respect to the rotation shaft of the rotor. The variable reluctance resolver according to one item.   7. The detection winding according to claim 1, wherein each of the plurality of split stator portions includes the same number of split detection winding portions as the excitation winding group. Variable reluctance type resolver.   8. The variable reluctance according to claim 7, wherein one excitation winding of the excitation winding group and the split detection winding portion arranged on the same plane in the radial direction are wound around the same bobbin. Type resolver.   The plurality of plate-shaped cores are formed so as to cover one excitation winding of the excitation winding group and the split detection winding portion arranged on the same plane in a radial direction. 9. The variable reluctance type resolver according to 7 or 8.   The variable reluctance resolver according to claim 7, wherein the exciting winding group and the divided winding portion are arranged in an axial direction with respect to a rotating shaft of the rotor.