JP3458916B2 - Rotary transformer type resolver - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary transformer type resolver used for servo control of FA and OA equipment.

[0002]

2. Description of the Related Art A conventional rotary transformer resolver is provided with a hollow cylindrical primary side transformer core C1 inside a cylindrical frame as shown in FIG. 1 of the rotary transformer part A that connects to the power supply
A secondary winding A1 is provided. Further, a hollow cylindrical secondary resolver core D2 is provided adjacent to the primary transformer core C1 and a two-phase detection winding B2a, B2b of the signal generator B is provided in the secondary resolver core D2. I have it. Inside the primary-side transformer core C1 and inside the secondary-side resolver core D2, the primary side of the secondary-side transformer core C2 and the signal generating section B of the cylindrical rotary transformer section A are opposed to each other with a gap therebetween. The side resolver core D1 is arranged, and the secondary side transformer core C2 and the primary side resolver core D1 are fixed to a common shaft E. The secondary transformer core C2 is provided with the secondary winding A2 of the rotary transformer section A, the primary resolver core D1 is provided with the excitation winding B1 of the signal generating section B, and the secondary transformer winding of the rotary transformer section A is wound. The wire A2 and the excitation winding B1 are connected by a crossover F to excite the signal generator B.

[0003]

However, in the prior art, the secondary winding of the rotary transformer and the exciting winding of the signal generator are separate cores, namely the secondary transformer core and the primary winding.
Since it is provided on the secondary resolver core, after mounting the secondary transformer core and primary resolver core on the shaft, 2
The secondary winding and the excitation winding are connected by a crossover wire.
Therefore, there is a problem that the processing process becomes complicated, the number of steps for connecting the crossovers increases, and the cost of the resolver itself increases. Therefore, an object of the present invention is to provide a resolver of high accuracy at a low cost by reducing the processing man-hours by connecting the crossover wires in advance by printed wiring.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is directed to a rotary plate formed at the center of a stationary core.
Primary side winding of lance and signal generation formed around it
Fixed side sheet coil consisting of the detection winding of the
A is formed in the center of the
On the secondary winding of the rotating transformer and the surrounding area
The signal that is formed and faces the detection winding through an air gap.
Equipped with a rotating side sheet coil consisting of the excitation winding of the signal generator
In the rotary transformer type resolver, the fixed core
And a recess in the portion corresponding to each connecting portion of the rotating core.
Is provided, and the fixed-side sheet coil and the rotating-side sheet coil are provided.
The special feature is that the coil is pressed against the recess to deform it.
It is a sign.

[0005]

By the above means, the secondary winding of the rotary transformer and the exciting winding of the signal generator are provided in one rotating sheet coil and are connected in series in advance by printed wiring or the like. A crossover wire between the secondary winding and the excitation winding is not required, and two sheet coils can be placed on both the fixed and rotating core surfaces, and both cores can be made to face each other with a predetermined gap. Since the resolver can be configured, it is possible to significantly reduce the manufacturing cost and provide a low-cost resolver. Well
Also, narrow the gap between the stator side and the rotor side sheet coil.
Therefore, a resolver having a high S / N ratio can be provided.

[0006]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view showing a first embodiment of the present invention before forming a recess, which is an example of a three-pole-pair axial gap type resolver in which a sheet coil is formed in a disk shape. In FIG. 1, 1
Is a fixed-side core provided with a magnetic plate 10 made of a material having good high-frequency iron loss characteristics such as disc-shaped ferrite, and 2 is a fixed-side sheet coil fixed to the void surface of the fixed-side core 1 by adhesion or the like. The primary winding 21 of the rotary transformer portion A and the detection winding 22 of the signal generating portion B are formed of a flat conductor by printed wiring by etching, printing or press working, and an insulating substrate made of a disc-shaped polyimide. It is formed by adhering to the front and back surfaces of No. 23, and the surface of the conductor is subjected to insulation treatment with polyimide resin or the like. Reference numeral 3 denotes a disk-shaped rotating core provided so as to face the fixed core 1 with a gap, and includes a magnetic plate 30 like the fixed core 1.
The rotating core 3 has its center fixed to the shaft 31 and is supported by the brackets 11 and 11 ′ fixed to the fixed core 1 via the bearing 12. Reference numeral 4 denotes a rotating-side sheet coil fixed to the air gap surface of the rotating-side core 3 by adhesion or the like, and the secondary winding 41 of the rotary transformer A and the exciting winding 42 of the signal generator B are similarly printed wiring. It is formed by adhering it to the front and back surfaces of an insulating substrate 43 made of a disc-shaped polyimide, and the surface of the conductor is further insulated with a polyimide resin or the like. FIG. 2 shows an embodiment of the present invention after formation of recesses.
It is a block diagram of. In the figure, the primary winding of the rotary transformer section A
21, the secondary winding 41, the excitation winding 42 of the signal generator,
Of each connecting terminal of the outgoing winding 41 and the connecting portion of the through hole
The cross section is exaggerated. That is, the fixed core 1
Corresponding to each through hole etc. of the rotating side core 3
By providing the recesses 13 and 32 in the portion to be
2 and the sheet coil 4 on the rotating side are pushed into the recesses 13 and 32.
It has been attached and transformed. With this configuration, each terminal and
Fixed when soldering through holes and through holes
From the surface of the side sheet coil and the rotating side sheet coil.
It does not stick out and therefore the gap length can be set small.
You can In addition, when fixing the fixed side core 1 and the fixed side sheet coil 2 and fixing the rotating side core 3 and the rotating side sheet coil 4 by adhesion, the thickness of the adhesive is 25
Since it becomes about μm, the magnetic gap increases, which leads to an increase in power consumption. Therefore, when soft magnetic powder such as soft ferrite is mixed in the adhesive, the relative permeability of the adhesive is improved, the magnetic gap is reduced, and the power consumption can be reduced.

The fixed-side sheet coil 1 is shown in FIG.
As shown in (b), the detection winding 22 of the signal generator B and the primary winding 21 of the rotary transformer A are provided. The detection winding 22 of the signal generator B has an insulating substrate 23 shown in FIG.
The A-phase winding 22a is arranged on the outer periphery on the front side of the above, and the B-phase winding 22b is arranged on the outer periphery on the back side shown in (b) so as to be electrically deviated from the A-phase winding 22a by 90 degrees. This example is 3
Since it has the number of pole pairs, the A-phase winding 22a and the B-phase winding 22
b are arranged in a circular shape so that the fan-shaped concentrated winding conductors 24 form three pole pairs on the outer peripheral portion of the insulating substrate 23. The concentrated winding conductor 24 includes a plurality of interlinking conductors 24a extending in the radial direction.
(A conductor that links the magnetic flux) and a plurality of arc-shaped coil end portions 24b that extend in the circumferential direction and that connect the link conductors 24a. On both surfaces of the insulating substrate 23 on the inner peripheral side of the A-phase winding 22a and the B-phase winding 22b, primary side windings 21 composed of spiral primary winding patterns 21a and 21b of the rotary transformer section A are provided, respectively. The A-phase winding pattern 22a and the primary winding pattern 21a form one winding pattern, and the B-phase winding pattern 22b and the primary winding pattern 21b form one winding pattern. The rotation side sheet coil 4 is
As shown in the front and back surfaces of FIGS. 5A and 5B, the excitation winding 42 of the signal generator B and the secondary winding 41 of the rotary transformer A are provided. Excitation winding 42 of signal generator B
Is a fan-shaped concentrated winding conductor 4 on the outer peripheral portions of both surfaces of the insulating substrate 43.
Exciting winding patterns 42a and 42b of three pole pairs of 4 are arranged and connected so as to form the exciting winding 42 of one circuit. The concentrated winding conductor 44 includes a plurality of interlinking conductors 44a extending in the radial direction and a plurality of arcuate coil end portions 44b extending in the circumferential direction connecting the interlinking conductors 44a.
Secondary windings 41 composed of spiral secondary winding patterns 41a, 41b of the rotary transformer A are provided on both surfaces of the insulating substrate 43 on the inner peripheral side. The secondary winding pattern 41a and the exciting winding pattern 42a, and the secondary winding pattern 41b and the exciting winding pattern 42b are respectively formed by one winding pattern formed on the same surface of the insulating substrate 43, and the winding pattern is formed. Excitation winding patterns 42a and 4
A connection portion T3 that connects 1b in series is provided.

As shown in FIGS. 3 and 4 , the circuit of the primary winding 21 of the rotary transformer A in the fixed-side sheet coil 1 has a primary winding from a terminal connected to an AC power supply AC or a pulse generator. It is connected to the outer peripheral conductor of the pattern 21a, is spirally wound inside, is passed from the inner conductor through the through hole T, is connected to the primary winding pattern 21b on the back side, and is spirally wound outside from the inner conductor. It is opened and connected to the terminal. The A-phase winding pattern 22a of the detection winding 22 of the signal generator B passes through the through hole T5 from the terminal provided on the back side and the A-phase winding pattern 22a provided on the front side.
Connected to the through hole T5 in the center of the
4 to the outer conductor of the adjacent concentrated winding conductor 24 having a phase difference of 180 ° in electrical angle from the outer conductor. Further, it is spirally wound inside and passes through the through hole T in the central portion of the concentrated winding conductor 24, is connected to the crossover conductor 25 on the back side, and passes through the through hole T in the central portion of the adjacent concentrated winding conductor 24.
It is spirally wound on the outside, passes through the outside conductor, and leads to the adjacent concentrated winding conductor 24. This is repeated, and finally it passes through the through hole T6 on the back side and is connected to the terminal. Similarly, the B-phase winding pattern 22b of the detection winding 22 of the signal generating portion B is connected to the through hole T7 in the central portion of the concentrated winding conductor 24 from the terminal provided on the front side, and the adjacent concentrated winding conductors are sequentially arranged. 24, and is connected to the terminal through the through hole T8.

Secondary winding 41 in the rotating sheet coil 4
As shown in FIGS. 3 and 5 , the coil is wound in a spiral shape so as to correspond to the primary winding 21 of the fixed-side sheet coil, and one end of each of the secondary winding patterns 41a and 41b is a through hole. Connected by T. The exciting windings 42 are connected by a through hole T in the center of the concentrated winding conductor 24 on the front and back surfaces. The other end portion of the secondary winding pattern 41a on the front surface and the excitation winding pattern 42a are connection portions 45a provided on the same pattern, and the other end portion of the secondary winding pattern 41b on the back surface and the excitation winding pattern on the front surface. Four
2a is connected by a through hole T3, and each winding pattern is connected in series. Fixing the rotating transformer A
When an AC voltage is applied to the primary winding 21 of the 10-side sheet coil 2, an AC voltage is induced in the secondary winding 41 of the rotating-side sheet coil 4, and the excitation winding connected to the secondary winding 41. 42 is excited, and an induced voltage is generated in the detection winding 22 due to the mutual inductance between the excitation winding 22 and the detection winding 22. The magnitude of the induced voltage in the detection winding 22 changes sinusoidally depending on the rotation angle of the rotor.
The rotation angle of the rotor can be detected by detecting the induced voltage of 2.

In the above embodiment, the primary winding and the secondary winding of the rotary transformer are provided inside the detection winding and the excitation winding which are arranged in a ring shape forming the signal generator. As described above, the primary winding and the secondary winding of the rotary transformer may be formed outside the detection winding and the excitation winding of the signal generator.

Further, in the above embodiment, the fixed core 1 having a disk shape is used.
An axial gap type resolver in which a disk-shaped fixed-side sheet coil 2 is provided in the disk-shaped rotary coil, the fixed-side sheet coil 2 is opposed to the fixed-side sheet coil 2 with an axial gap, and a disk-shaped rotary-side core 3 is provided with a rotary-side sheet coil 4. The fixed-side core is formed in a hollow cylindrical shape, the fixed-side sheet coil formed in the hollow cylindrical shape is provided inside the fixed-side core, and the fixed-side sheet coil is opposed to the fixed-side sheet coil through a radial gap to form a cylindrical shape. A radial gap type resolver may be formed by providing a cylindrical rotating side sheet coil on the outside of the rotating side core.

[0012]

As described above, according to the present invention, the rotor winding of the signal generator and the detection winding of the rotary transformer are:
Since it is integrally formed with a continuous conductor pattern on the same sheet coil, the connection of crossovers is not necessary, and it is only necessary to fix two sheet coils to the core surface and to face each other with a required gap. Therefore, it is possible to significantly reduce the number of steps as compared with the conventional example. In addition, copper loss is reduced, power consumption is reduced, and the signal generator is also formed by a sheet coil, so the magnetomotive force distribution can be easily made into an ideal shape, which is more accurate than before. It is effective in providing a resolver. Furthermore, between the sheet coil on the stator side and the rotor side
The resolver with a high S / N ratio can be
There is an effect that you can serve.

[Brief description of drawings]

FIG. 1 is a side sectional view before forming a recess according to an embodiment of the present invention.

FIG. 2 is a side cross-sectional view after forming a recess showing an embodiment of the present invention.

FIG. 3 is a connection diagram showing a connection state of each part of the embodiment of the present invention.

FIG. 4 is a plan view of (a) a front side and (b) a back side of the fixed-side sheet coil of the embodiment of the present invention viewed from the same direction.

FIG. 5 is a plan view of (a) a front side and (b) a back side of the rotating-side sheet coil of the embodiment of the present invention viewed from the same direction.

FIG. 6 is a side sectional view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 fixed side core, 10, 30 magnetic material plate, 11, 11 'bracket, 12 bearing, 13, 32 recessed part, 2 fixed side sheet coil, 21 primary side winding, 21a, 21b primary winding pattern, 22 detection winding , 23 insulating substrate, 24 concentrated winding conductor, 24a interlinking conductor, 24b coil end portion, 2
5 crossover conductor, 3 rotation side core, 31 shaft, 4 rotation side sheet coil, 41 secondary winding, 41a, 41b secondary winding pattern, 42 exciting winding, 43 insulating substrate, 44
Concentrated winding conductor, 44a interlaced conductor, 44b coil end part, 45a connecting part, A rotating transformer part, B signal generating part, T, T3, T5, T6, T7, T8 through hole

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiko Maemura No. 2 Kurosaki Shiroishi, Yawatanishi-ku, Kitakyushu, Fukuoka Yasukawa Electric Co., Ltd. No. Yasukawa Electric Co., Ltd. (56) Reference JP 63-65302 (JP, A) JP 55-13882 (JP, A) JP 4-222447 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01B 7/00 G01D 5/245

Claims (3)

(57) [Claims] 1. A rotary tiger formed at the center of a stationary core.
Primary winding and the signal generator formed around it
Fixed side sheet coil consisting of the detection winding of the primary side and the primary side through a gap formed in the center of the rotating side core.
The secondary winding of the rotary transformer facing the side winding, and
Is formed around and faces the detection winding through an air gap.
A rotating-side sheet coil consisting of the excitation winding of the signal generator
Corresponding to each connecting portion of the fixed side core and the rotating side core in a rotary transformer type resolver equipped with
A concave portion is provided in the portion to be
And the rotating-side sheet coil are pressed against the recess to deform
A rotating transformer-type resolver that is characterized by 2. A rotary tiger formed at the center of a stationary core.
Primary winding and the signal generator formed around it
Fixed side sheet coil consisting of the detection winding of the primary side and the primary side through a gap formed in the center of the rotating side core.
A secondary winding of the rotary transformer facing the winding, and
It is formed in the periphery and faces the detection winding via a gap.
Rotating-side sheet coil composed of the excitation winding of the signal generator
In the rotary transformer type resolver including the above, the outer peripheral portion of the fixed side core and the fixed side sheet coil is circled.
The outer core of the rotating core and the rotating sheet coil is made cylindrical.
The fixed core and the outer circumference of the fixed sheet coil
Characterized by a cylindrical shape that faces each other through a gap
Revolving transformer type resolver. 3. The fixed core and the fixed sheet carp
And the rotating side core and the rotating side sheet coil
Was fixed with an adhesive containing soft magnetic powder
Rotation according to claim 1 or 2, characterized in that
Transformer-type resolver.