JPH08313297A - Sheet coil-type resolver - Google Patents

Abstract

PURPOSE: To reduce consuming power and stabilize a detection voltage by uniforming a diametrical direction of magnetic fluxes formed by an excitation phase coil, increasing magnetic fluxes interlinking with a detection phase coil, and uniforming a diametrical direction of an induced voltage. CONSTITUTION: In an excitation phase coil 1, a one-phase coil pattern CPE consisting of an insulating sheet 12 and winding coils Ce, Ce' is attached to a surface of a ring-like regularly polygonal yoke 11. The insulating sheet 12 has aprons 13 set at each outer side of a regular polygon smaller than the surface of the yoke 11 and triangular aprons 14 at each inner side. The winding coils Ce, Ce' formed at a front and a rear faces of the sheet 12 have through holes 15 and connection terminals 16, 16' in the aprons 13. Coil ends 17, 18 of the pattern CPE are obtained by bending the pattern an inner and outer sides of the yoke 11 sideways. In a detection phase coil 2, a coil pattern CPD is attached to a surface of a yoke 21 which has an inner diametrical angle twice the yoke 11 of the excitation phase coil. The coil pattern CPD is constituted of an insulating sheet 22 having rectangular aprons 23 smaller than the coil and aprons 24 at each inner side, and winding coils Cd, Cd'.

Description

Detailed Description of the Invention

[0101]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet coil type resolver.

[0092]

BACKGROUND OF THE INVENTION The present applicant has previously filed Japanese Patent Application No. 6-24200.
In No. 7, an exciting phase coil formed of a sheet coil so that an electric angle of each pole of the axis multiplication angle X becomes 180 degrees, and an exciting angle coil opposed to the exciting phase coil with a gap therebetween. In a sheet coil type resolver provided with a detection phase coil formed by a sheet coil consisting of two phases having a phase difference of 90 degrees, the detection phase coil forms X pairs of spirals forming only the α phase coil on the surface of the insulating sheet. A sheet coil type resolver has been proposed which is composed of a coil pattern made of a conductor and a coil pattern made of X pairs of spiral conductors forming only a β-phase coil on the back surface.

[0093]

However, one of the excitation phases is
The distribution of the magnetic flux created by each spiral conductor is in the shape of a quadrangular pyramid with the center of the spiral as the apex, and the interlinkage magnetic flux with the spiral conductor in the detection phase becomes smaller as the distance from the center of the spiral increases. That is, the induced voltage at the coil end portions on the inner and outer diameter sides is small and the contribution to the detection voltage is small. In order to increase the detection voltage, it is necessary to increase the outer diameter of the coil pattern or increase the exciting current. If the outer diameter of the coil pattern is made large, the coil pattern becomes large, and if the exciting current is made large, power consumption becomes large. Therefore, the present invention, without increasing the outer diameter of the coil pattern or increasing the exciting current,
An object of the present invention is to provide a sheet coil type resolver capable of increasing the induced voltage of the detection phase coil.

[004]

In order to solve the above-mentioned problems, an exciting phase coil formed of a sheet coil so that an electric angle of each pole of the axis multiplication angle X is 180 degrees, and an exciting phase coil In a sheet coil type resolver comprising a detection phase coil formed of two-phase sheet coils having a phase difference of 90 degrees in electrical angle, which face each other with an air gap, the excitation phase coil is provided with an inner diameter side. Ring-shaped regular polygonal yoke 11 having a regular polygonal hole in the
An insulating sheet 12 having a rectangular apron 13 on each outer side of a regular polygon and a triangular apron 14 on each inner side of the surface of the yoke 11, and the apron 1.
Spiral coils Ce and C formed on the front and back surfaces of the insulating sheet 12 in which the through holes 15 and the connection terminals 16 and 16 ′ are provided in FIG.
Attach a one-phase coil pattern CPE consisting of e ',
The coil ends 17 and 18 of the coil pattern CPE are formed by bending the inner and outer sides of the yoke 11 toward the side surface. The detection phase coil is formed on the surface of a regular polygonal yoke 21 having a double angle of the yoke 11 of the ring-shaped excitation phase coil having a regular polygonal hole on the inner diameter side, and is a size smaller than the surface of the yoke 21. An insulating sheet 22 in which a rectangular apron 23 is provided on each outer side of the polygon and a triangular apron 24 is provided on each inner side, and a through hole 25 and connecting terminals 26, 2 are provided in the apron 23.
Two-phase coil pattern CP including spiral coils Cd and Cd ′ formed on the front and back surfaces of the insulating sheet 22 provided with 6 ′.
C is attached, and the coil end 2 of the coil pattern CPD is attached.
7, 28 are formed by bending the inner and outer sides of the yoke 21 toward the side surface. The excitation coil and the detection coil are opposed to each other with a gap therebetween to form a sheet coil type resolver.

[0095]

By the above means, the excitation phase coil 1 and the detection phase coil 2 face only the straight portions of the spirally arranged conductors of the spiral coil, and the magnetic flux generated by the excitation phase coil 1 is substantially uniform in the radial direction. Therefore, the magnetic flux interlinking the detection phase coil 2 increases. Also, the through holes 15 and 25 and the connection terminal 1
6, 16 ', 26, 26' are arranged on the outer diameter side surfaces of the yokes 11, 21.

[0086]

Embodiments of the present invention will be described below with reference to FIGS. 1 (a) and 1 (b), using a resolver having a shaft angle multiplier of 3 as an example. FIG. 1A is a plan view of an excitation phase coil, and FIG. 1B is a plan view of a detection phase coil. The excitation phase coil 1 is a yoke 1 made of a magnetic material having a hexagonal hole on the outside and a hexagonal hole on the inside.
The coil pattern CPE formed on the front and back of the insulating sheet 12 is attached to the surface of the first sheet 1. The basic part of the insulating sheet 12 is a regular hexagon smaller than the surface of the yoke 11, and a rectangular apron 13 is provided on each outer side, and a triangular apron 14 is provided on each inner side so as not to interfere when bent. It is provided as follows. On the surface of the insulating sheet 12, conductors are radially arranged on the line connecting the points between the inner and outer sides of the regular hexagon facing each other, which are divided by a predetermined pitch, and the yoke 11 is formed at the outer apron 13 part. With a plurality of U-shaped crossovers provided in parallel to the outer side of the
With a plurality of rectangular crossovers, conductors arranged radially are sequentially connected to each other, and six spiral coils Ce having a mechanical angle of 60 ° are formed. If the conductors are radially arranged with a sine pitch, the distribution of the exciting magnetic flux in the circumferential direction becomes a sine wave, and the detection accuracy is improved. The apron 13 has a through hole 15 on the center side of the spiral and a connection terminal 16 on the outside. Apron 13 and Apron 14
The upper connecting wire becomes the outer coil end 17 and the inner coil end 18. The above forms the coil pattern on the surface. The back surface of the insulating sheet 12 also has a spiral coil Ce on the front surface.
The same spiral coil Ce ′ as the surface is formed by reversing the spiral direction, and the apron 13 is provided with a through hole 15 on the spiral center side and a connecting terminal 16 ′ on the outer side. The above forms the coil pattern on the back surface. The surface of the coil pattern on the back side is covered with an insulating sheet. The coil pattern on the front side and the coil pattern on the back side are connected by the through holes 15 to form a coil pattern CPE.
As shown in FIG. 2A, after the coil pattern CPE is pasted on the surface of the yoke 11, the apron 13 and 14 are attached.
The portion is bent along the outer and inner sides of the yoke 11, and the terminal 16 'of the coil pattern on the back side and the terminal 16 of the coil pattern on the front surface are sequentially connected by a crossover J, and the two adjacent connecting terminals 16 are opened for external connection. Use as a terminal. After that, it is attached to the side surface of the yoke 11. As a result, the coil pattern C
PE serves as a one-phase excitation phase coil 1 in which spiral coils Ce and Ce ′ are connected in series. The detection phase coil 2 is configured by attaching the coil pattern CPD formed on the front and back sides of the insulating sheet 22 to the surface of the yoke 21 made of a magnetic material having a regular dodecagon on the outside and a dodecagon on the inside. The basic part of the insulating sheet 22 is a regular dodecagon, which is slightly smaller than the surface of the yoke 21, and has a rectangular apron 23 on each outer side.
A triangular apron 24 is provided on each inner side so as not to interfere when bent. On the surface of the insulating sheet 22, conductors are radially arranged on a straight line connecting points of the regular regular dodecagonal opposing inner and outer sides, which are divided at equal pitches on each side, and a yoke is formed on the apron 23 on the outer side. 21 With a plurality of U-shaped crossovers provided in parallel to the outer side, a plurality of triangular crossovers at the inner part of the apron 24 are used to sequentially connect the conductors arranged radially to each other. Then, 12 spiral coils Cd are formed. If the conductors are radially arranged with a sine pitch, the distribution of the induced current in the conductor in the circumferential direction becomes a sine wave, and the detection accuracy is improved. Apron 23
A through hole 25 on the center side of the spiral and a connection terminal 26
Is provided. The connecting wire on the apron 23 and the apron 24 has an outer coil end 27 and an inner coil end 2
It will be 8. The above forms the coil pattern on the surface. On the back surface of the insulating sheet 22, the same coil Cd 'as that on the front surface is formed by superposing the coil Cd on the front surface with the spiral direction reversed, and a through hole 25 is formed at the end of the coil Cd' on the spiral center side. A connection terminal 26 'is provided on the outside. The above forms the coil pattern on the back surface. The surface of the coil pattern on the back side is covered with an insulating sheet. The coil pattern CPD is configured by connecting the coil pattern on the front surface and the coil pattern on the back side through the through holes 25. As shown in FIG. 2B, the coil pattern CP is formed on the surface of the yoke 21.
After attaching D, attach the apron 23 and 24 to the yoke 2
1. Bend along the outer and inner sides of 1 and sequentially connect every other terminal 26 ′ of the coil pattern on the back side and the terminal 26 of the coil pattern on the front side with crossovers Jα and Jβ, and connect two adjacent connection terminals 26, 26. 2'are opened and used as an external connection terminal.
The spiral coils Cd and Cd 'are connected in series, and the mechanical angle is 3
A detection phase coil 2 having two phases of α phase and β phase having a phase of 0 ° is formed. As a result, the through holes 15 and 25 and the connection terminals 16, 16 ', 26 and 26' are connected to the yokes 11 and 2.
1 is arranged on the outer diameter side. For the sake of explanation, the yoke 11 is a regular hexagon and the yoke 21 is a regular dodecagon. However, the yoke 11 is a regular polygon having a shaft multiplication angle X * 2 * integral multiple, and the yoke 21 is twice as large as the yoke 11. It may be a regular polygon having corners. When the excitation phase coil 1 and the detection phase coil 2 are opposed to each other with a gap in the axial direction and a sinusoidal current is supplied to the excitation phase coil 1, the detection phase coil 2 has a phase difference of 90 ° in electrical angle with respect to α phase and β phase. The voltage of the phase is induced and it operates as a resolver. At this time, the opposing coils of the excitation phase coil 1 and the detection phase coil 2 are only the linear portions radially arranged,
The magnetic flux generated by the excitation phase coil 1 is substantially uniform in the radial direction.
As a result, the voltage induced in the detection phase coil 2 becomes uniform in the radial direction.

FIG. 3 shows a second embodiment. The yoke 11 of the embodiment is replaced with a disc-shaped yoke 31 having a circular hole on the inner diameter side, and a non-magnetic outer bobbin 32 having a regular hexagonal inner side inscribed on the outer diameter of the yoke 31 on its side surface. The yoke 31
A non-magnetic inner bobbin 33 having a regular hexagonal outer side circumscribing the circular hole is provided. The same coil pattern CPE as that of the embodiment is attached to the surface of the yoke 31, the outer bobbin 32, and the inner bobbin 33, and the inner bobbin 3 is attached to the outer side of the outer bobbin 32.
The coil ends 17 and 18 are bent along the inner side of 3. After that, the excitation phase coil 1 is constructed in the same manner as in the embodiment. On the other hand, the detection phase coil includes the yoke 21 of the embodiment,
In place of the disk-shaped yoke 41 having a circular hole on the inner diameter side, a non-magnetic outer bobbin 43 having a regular dodecagonal inner side inscribed on the outer diameter of the yoke 41 is provided on the side surface of the yoke 41. A non-magnetic inner bobbin 43 having a regular dodecagonal outer periphery is provided. Yoke 41, outer bobbin 42 and inner bobbin 4
The same coil pattern CPD as in the embodiment
And the coil ends 27 and 28 are bent along the outer and inner sides of the outer bobbin 42 and the inner bobbin 43. After that, the detection phase coil 2 is configured similarly to the embodiment. In addition, the outer bobbin 32 and the inner bobbin 33 are formed into a regular hexagon,
The inner bobbin 43 and the inner bobbin 43 may be connected by a side plate made of a regular dodecagonal non-magnetic material. With the configuration as described above, it becomes easy to deal with various types of polygons.

[0085]

The above-mentioned structure has the following effects. (1) The magnetic flux generated by the excitation phase coil 1 becomes substantially uniform in the radial direction, and the magnetic flux interlinking the detection phase coil 2 increases,
Since the induced voltage is substantially uniform in the radial direction, power consumption can be reduced and the detection voltage becomes stable. (2) Since the through hole and the connection terminal are arranged on the outer diameter side, the gap can be reduced, power consumption can be reduced, and connection work can be facilitated.

[Brief description of drawings]

FIG. 1A is a plan view of an excitation phase coil, and FIG. 1B is a plan view of a detection phase coil according to an embodiment of the present invention.

FIG. 2A is a perspective view of an excitation phase coil and FIG. 2B is a perspective view of a detection phase coil showing an assembled state of the present invention.

3A is a plan view of an excitation phase coil, and FIG. 3B is a plan view of a detection phase coil according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Excitation phase coil 11, 21, 31, 41 Yoke 12, 22 Insulation sheet 13, 14, 23, 24 Apron 15, 26 Through hole 16, 16 ', 26, 26' Terminal 17, 18, 27, 28 Coil end 2 Detection phase coil 32, 42 Outer bobbin 33, 43 Inner bobbin Ce, Ce ', Cd, Cd' Swirl coil CPE, CPD Coil pattern J, Jα, Jβ Crossover wire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriaki Iwabuchi 2-1, Kurosaki Shiroishi, Hachimansai-ku, Kitakyushu, Fukuoka Prefecture Yasukawa Electric Co., Ltd.

Claims (2)

[Claims] 1. An excitation phase coil formed of a sheet coil so that an electrical angle for each pole of the axis multiplication angle X is 180 degrees, and an excitation phase coil opposed to the excitation phase coil with a gap therebetween. A sheet coil type resolver comprising a detection phase coil formed by a sheet coil consisting of two phases having a phase difference of 90 degrees at an angle, wherein the exciting phase coil has a ring-shaped regular polygonal shape having a regular polygonal hole on an inner diameter side. A rectangular apron on each outer side and a triangular apron on each inner side, a one-phase coil pattern consisting of spiral coils formed on the front and back surfaces of this insulating sheet, and this coil pattern on the surface A ring-shaped regular polygonal yoke having a regular polygonal hole on the inner diameter side, the detection phase coil having a double angle of the yoke of the excitation phase coil having a regular polygonal hole on the inner diameter side. A two-phase coil pattern consisting of an insulating sheet having a rectangular apron on each outer side of a ring-shaped regular polygon and a triangular apron on each inner side, and a spiral coil formed on the front and back surfaces of this insulating sheet. And a ring-shaped regular polygonal yoke having a double angle of the yoke of the excitation phase coil having a regular polygonal hole on the inner diameter side and having the coil pattern attached to the surface thereof. A sheet coil type resolver, characterized in that each apron is bent laterally at the inner and outer sides of each yoke. 2. The yoke of the excitation phase coil and the yoke of the detection phase coil are discs having circular holes, and a regular polygonal bobbin inscribed in the outer diameter of these yokes and a regular polygonal bobbin inscribed in the inner diameter thereof. The sheet coil type resolver according to claim 1, further comprising: