JP3536375B2 - Sheet coil type resolver - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resolver in which a conductor is formed by a sheet coil. 2. Description of the Related Art Conventionally, as a sheet coil used in a motor or the like, a flat spiral conductor made of metal is opposed to both sides of a thin-film insulating sheet layer with a thin-film insulating sheet layer therebetween. An electric connection is disclosed (for example, Japanese Patent Publication No. 61-56700).
issue). For example, as shown in FIG. 3, an excitation voltage Eθ is applied to a one-phase excitation phase coil provided on the rotor, as shown in FIG.
Is applied to the two-phase detection phase coils α and β provided on the stator.
Output the detection voltages Eα and Eβ. When applied to a 6-pole, 1-phase excitation, 2-phase detection type resolver, the excitation phase coil is connected as shown in FIG.
In addition, it is conceivable that the detection coil is configured as shown in FIG. In FIG. 5, reference numeral 1 denotes an exciting phase coil, and coil patterns 1a, 1b each having six spiral conductors 11a, 11b spirally extending from the center of a six-pole spiral.
b, and the coil patterns 1a and 1b are affixed to the front and back with the disc-shaped insulating sheet 2 made of a polyimide sheet or the like interposed therebetween. When viewed from the same direction, the coil pattern 1a indicated by a solid line and the coil pattern 1b indicated by a dotted line are wound in opposite directions. A through hole 12 is provided at the center of the spiral of each pole, and the spiral conductor 11
a and 11b are connected to each other and spiral conductors 11a and 11b
Are connected to the outer ends of the adjacent spiral conductors 11a and 11b, respectively, and the outer ends + θ and −θ of two adjacent spiral conductors 11b are connected to an excitation power supply. In a six-pole resolver, the pole pitch has a mechanical angle of 60 degrees, and the angle occupied by one spiral conductor of the exciting phase coil 1 is a mechanical angle of 60 degrees. Therefore, 6 × 2 = 12 spiral conductors are arranged on both sides.
In FIG. 4, reference numeral 3 denotes a detection phase coil, which is provided with a coil pattern 31 having two spiral conductors 31a and 31b for one pole and spiral conductors 32a and 32b in order to form a two-phase detection phase coil. Coil pattern 32
It is attached so as to face the front and back with the disk-shaped insulating sheet 4 interposed therebetween. That is, one spiral conductor 31a connected to the + α terminal shown in FIG. 4 is provided on the front side of the insulating sheet 4, and the inner end of the conductor wound from the outer end of the spiral conductor 31a has a through hole 33a at the center of the spiral. Is connected to the inner end of the spiral conductor 32a on the back side, the outer end of the spiral conductor 32a is connected to the outer end of the spiral conductor 32a of the adjacent pole, and the through hole 33a at the center of the spiral of the spiral conductor 32a on the back side is connected. Are connected to the spiral conductor 31a on the front side, and are sequentially connected over six poles. The outer end of the last spiral conductor 31a is connected to the -α terminal to complete the detection phase coil 3α. Since one spiral conductor 31b of the detection phase coil 3β connected to the + β terminal has a phase difference of 90 degrees in electrical angle with respect to the detection phase coil 3α, it has a phase difference of 30 degrees in mechanical angle. It is provided on the front side of the insulating sheet 4 adjacent to the spiral conductor 31a of the detection phase coil 3α. The conductor wound from the outer end of the spiral conductor 31b has an inner end at the center of the spiral of the spiral through the through-hole 33b and the spiral conductor 32b on the back side.
The outer end of the spiral conductor 32b is connected to the outer end of the spiral conductor 32b of the adjacent pole, and the spiral conductor 32b on the back side is connected from the through hole 33b at the center of the spiral to the front spiral conductor 31b. Are sequentially connected over six poles, and the outer end of the last spiral conductor 31b is connected to the -β terminal to complete the detection phase coil 3β. The spiral conductors 31a and 31b provided on the front side of the insulating sheet 4 and the spiral conductors 32a and 32 provided on the back side of the insulating sheet 4
Since two poles b are provided for each pole, there are 12 poles for 6 poles, and the angle occupied by one spiral conductor is 30 degrees in mechanical angle. In the prior art, however, the angle occupied by one spiral conductor of the exciting phase coil is 60 degrees in mechanical angle, whereas the angle of one spiral of the detecting phase coil is one. The angle occupied by the conductor is 30 degrees in mechanical angle. The total number of turns of the α-phase and β-phases of the detection phase coil included in one pole is almost the same as the number of turns of the excitation phase coil included in one pole. The area per pole occupied by the phase is approximately half that of the exciting phase coil. By the way, in general, the flux linkage Φ of the detection phase coil is expressed by the following (1)
It is represented by an equation. _{Φ = n · H I · μ} 0 · (S / g) ... (1) where, n represents the detected phase coil turns, H _I is the magnetomotive force generated by the excitation phase coil, mu ₀ is the permeability, S is The area where the magnetic flux of the exciting phase coil is linked to the detection phase coil, g is a gap value. Therefore, since the area per pole occupied by the α-phase and β-phase of the detection phase coil is almost half of the excitation phase coil, the detection phase coil sufficiently links the magnetic flux generated by the excitation phase coil. As a result, the induced voltage of the detection phase coil cannot be sufficiently increased, which leads to an increase in power consumption. An object of the present invention is to provide a resolver that can increase induced voltage and reduce power consumption by increasing the interlinkage magnetic flux area of a detection phase coil. In order to solve the above-mentioned problem, the present invention is directed to the present invention, in which the angle of each pole of the pole pair X is 1 electrical angle.
It is composed of one phase formed by a flat sheet coil so as to form an angle of 80 °.
The spiral center provided on the coil pattern on one side
Vortex in the through hole of the other side and the coil pattern on the other side
Form one circuit by connecting through-hole at center of winding
Open a part of the circuit and connect both ends to the excitation power supply end.
And excitation phase coil connected to the child, composed of two phases of α-phase coil and β-phase coils having a phase difference of 90 ° in electrical angle from each other which is formed by a planar sheet coil opposed via a gap in the excitation phase coil As well as the insulation sheet
It is provided on one side and a pair of adjacent spiral conductors are
Α-phase coil pattern consisting of X pairs of spiral conductors connected in a row
And an adjacent pair provided on the other surface of the insulating sheet.
X pairs of spiral conductors connected in series with each other
Β-phase coil pattern and the spiral of the spiral conductor
A detection coil having a first through hole provided in a core portion , wherein the detection phase coil has the same diameter as the center of the spiral at the position having the same diameter.
A second through hole provided between the spiral conductors;
Two first through hoes provided between the spiral conductors
Two α-phase outlets respectively connected to the
The spiral conductor excluding a first through hole connected to an outgoing line;
Connected to the first through hole provided between
An α-phase connecting wire connecting a pair of adjacent α-phase coils;
Two second through holes provided between spiral conductors
And two β-phase outlets respectively connected to the
The spiral conductor except for the second through hole connected to the wire
Connected to the second through hole provided between
And a β-phase connecting wire connecting a pair of β-phase coils in contact with each other. According to the above-mentioned means, the detection phase coil has a coil pattern composed of X pairs of spiral conductors forming only an α phase coil on one surface of the insulating sheet and only a β phase coil on the other surface. Since the coil pattern composed of the X pairs of spiral conductors to be formed is provided, the area occupied by one spiral conductor of the detection phase coil is substantially the same as the area occupied by one spiral conductor of the excitation phase coil. In comparison, the linkage flux is greatly increased. As a result, the induced voltage of the detection phase coil increases, and the power consumption decreases. In addition, since the same coil pattern as the detection phase coil is attached to both sides of the insulating sheet to form the excitation phase coil, the coil pattern for the detection coil and the excitation coil can be shared. Can be reduced. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a detection phase coil according to a first embodiment of the present invention. The exciting phase coil 1 has the same configuration as that described in the conventional example with reference to FIG. In the figure,
Reference numeral 5 denotes a detection phase coil, in which an α-phase coil 5A is formed on one surface (front surface) of a disc-shaped insulating sheet 6 and the other surface (back surface).
Is formed with a β-phase coil 5B. As shown by the solid line in FIG. 1, the coil pattern 5a of the α-phase coil 5A is composed of six (three pairs) spiral conductors 51a, each of which is spirally wound from the center of the six-pole spiral and spreads one by one. Are arranged on the surface of the insulating sheet 6 so that the angle occupied by the electrical sheet becomes approximately 180 degrees in electrical angle. In addition, two adjacent (1
The outer conductor of the spiral conductor 51a of the (pair) is connected, and a through hole 53Aa is provided at the center of the spiral of each spiral conductor 51a. A through-hole 53Ab is provided between the pair of spiral conductors 51a connected to each other and at the same diameter as the through-hole 53Aa at the center of the spiral. A β-phase lead wire 52a extending toward the outer peripheral direction is provided between one pair of the spiral conductors 51a of the three pairs and connected to the through hole 53Ab. , Β-phase coil 5B provided on the back side
Is provided with a .beta.-phase interconnecting line 54a connecting the center of the spiral between a pair of adjacent spiral conductors 51b. β phase coil 5
As shown by the dotted line in FIG. 1, the coil pattern 5b of B
It has the same coil pattern as the α-phase coil 5A, and is arranged on the back surface of the insulating sheet 6 so as to have a phase difference of 90 ° in electrical angle with respect to the α-phase coil 5A. That is, the outer conductors of two adjacent (one pair) spiral conductors 51b are connected, and a through hole 5 is formed at the center of the spiral of each spiral conductor 51b.
3Ba is provided. Between the pair of spiral conductors 51b connected to each other, a through hole 53B is formed at the same diameter as the through hole 53Ba at the center of the spiral.
b is provided. Α-phase lead wire 52 extending toward the outer peripheral direction between a pair of spiral conductors 51b of the three pairs
b is connected to the through hole 53Bb, and between the other pair of spiral conductors 51b, the spiral center of a pair of adjacent spiral conductors 51a of the α-phase coil 5A provided on the surface is connected. A phase transfer line 54b is provided. The α-phase coil 5A is connected to an α-phase lead wire 52b and a through hole 5
Via 3Bb, it is connected to the through hole 53Aa of the coil pattern 5a provided on the front side, and the spiral conductor 51a is connected to the outer conductor of the adjacent spiral conductor 51 which extends outward from the through hole 53Aa. Adjacent spiral conductor 51a
Is wound from the outer conductor toward the center of the spiral, and then through the through hole 53Aa at the center of the spiral, the through hole 53Bb provided on the back surface, and the through hole 53Aa at the center of the adjacent spiral conductor 51a via the α-phase transition wire 54b. Connected to. This pattern is repeated, and the circuit is turned around and connected to the -α terminal provided on the outer peripheral side via the through-hole 53Bb and the α-phase lead wire 52b to form a six-pole α-phase coil 5Aa. The β-phase coil 5B has a β-phase lead wire 52 provided on a surface extending from the + β terminal provided on the outer peripheral side toward the center.
a, the spiral conductor 51b is connected to the through-hole 53Ba of the coil pattern 5b provided on the back surface through the through-hole 53Ab, and the spiral conductor 51b spreads outward and is adjacent to the spiral conductor 51b.
Is connected to the outer conductor. The adjacent spiral conductor 51b is wound from the outer conductor toward the center, and then through the through hole 53Ba at the center of the spiral, the through hole 53Ab provided on the surface, and the adjacent spiral conductor 5 via the β-phase transition line 52a.
1b is connected to the through hole 53Ba at the center of the spiral. This pattern was repeated, and the circuit was turned around and provided on the outer peripheral side through the through-hole 53Ab and the β-phase outlet 52a.
It is connected to the β terminal to form a 6-pole β-phase coil.
In the six-pole resolver, the angle occupied by one spiral conductor of the detection phase coil in both the α phase and the β phase is approximately 60 degrees of the mechanical angle obtained by subtracting the width of the crossover. The α phase and β phase are out of phase with each other by 30 degrees in mechanical angle and 90 degrees in electrical angle. Here, a comparison between the detection phase coils of the conventional example and the above-mentioned embodiment will be described.
The number of turns obtained by adding the number of turns of each of the phase and the β phase is substantially the same. The area per pole occupied by each of the α-phase and the β-phase is approximately half that of the conventional detection phase coil compared to the excitation phase coil. However, in the above embodiment, it has the same area as the exciting phase coil. That is, the area per pole occupied by each of the α phase and the β phase of the detection phase coil of the above embodiment is almost twice as large as that of the related art. In the actual detection phase coil, since it is necessary to provide the wiring between the spiral conductors, the area could not be completely doubled in the embodiment in comparison with the case of the conventional detection phase coil. Interchange magnetic flux was about 1.5 times that of the conventional example. Further, when the induced voltage of the detection phase coil is a constant, the excitation current of the excitation phase coil is proportional to the interlinkage magnetic flux.
It is 3. Therefore, the copper loss of the exciting phase coil is reduced to about 4/9. In addition, since the pattern of the coil pattern of the detection phase coil according to the present invention is substantially the same as that of the excitation phase coil, the number of turns of the detection phase coil can be maximized, and the space factor of the coil is improved. FIGS. 2 (a) and 2 (b) are plan views of the exciting phase coil 7 according to the second embodiment viewed from the same direction. FIG. 2 (a) is provided on the front side of a disc-shaped insulating sheet 8. Coil pattern 7
(a) and (b) are coil patterns 7b provided on the back side of the insulating sheet 8, and have the same shape on both sides as the coil pattern of the detection phase coil of the first embodiment. The coil patterns 7a and 7b are arranged so that the front and back coil patterns of the insulating sheet 8 have no phase difference, and the front and back coil patterns 7a and 7b are provided at the center of the spiral of the spiral conductors 71a and 71b. , 73b and 1
A circuit is formed, a part of the outer conductor of the spiral conductor 71b is opened, and its end is pulled out to the outer peripheral side of the insulating sheet 8 and connected to the excitation power supply terminals + θ, -θ. Therefore, the angle occupied by each of the spiral conductors 71a and 71b is 180 electrical degrees.
° to form a one-phase six-pole excitation phase coil. Note that the radial wiring 72 used as the detection phase coil was used.
Also, the outer transition wire 74 is not used, but does not affect the exciting phase coil. As described above, since both the excitation phase coil and the detection phase coil can be composed of one type of coil pattern having a spiral conductor, the production cost can be greatly reduced as compared with the case where two types of conventional coil patterns are required. As described above, according to the present invention, although the number of turns per pole of the detection phase coil is the same as that of the prior art, the flux linkage is greatly increased. The exciting current of the exciting phase coil is reduced, and the power consumption can be greatly reduced.
Further, since the coil patterns of the excitation phase coil and the detection phase coil can be made identical, there is an effect that the manufacturing cost can be greatly reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan sectional view showing a detection phase coil according to a first embodiment of the present invention. FIG. 2 is a plan sectional view showing an exciting phase coil according to a second embodiment of the present invention. FIG. 3 is a connection diagram of a resolver. FIG. 4 is a plan sectional view showing a conventional detection phase coil. FIG. 5 is a plan sectional view showing a conventional excitation phase coil. [Description of Signs] 1, 7 Excitation phase coils, 1a, 1b, 5a, 5b, 7
a, 7b coil pattern, 11a. 11b, 31, 3
2, 51a, 51b, 71a, 71b spiral conductor, 1
2, 33a, 33b, 53Aa, 53Ab, 53Ba,
53Bb, 73a, 73b Through hole, 2, 4,
6,8 Insulation sheet, 3,5 Detection phase coil, 5A α
Phase coil, 5B β phase coil, 52a β phase lead wire, 5
2b α-phase exit line, 54a β-phase transition line, 54b α-phase transition line

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-222447 (JP, A) JP-A-63-65302 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 3/26 G01B 7/00 G01B 7/30 101 G01D 5/245 101 H02K 24/00

Claims (1)

(57) [Claims 1] The angle of each pole of the number X of pole pairs is 18 in electrical angle.
It is composed of one phase formed by a planar sheet coil so as to be 0 °, and both of the insulating sheet (8)
Provided on one side, and provided on the coil pattern (7a) on one side.
The through hole (73a) at the center of the spiral and the
Through hole at the center of the spiral provided in the oil pattern (7b)
(73b) to form one circuit, and
Open a part of the path and connect both ends to the excitation power supply terminals (+ θ,-
and excitation phase coils connected to θ) (7), α-phase coils having a phase difference of 90 ° in electrical angle from each other which is formed by a planar sheet coil opposed via a gap in the excitation phase coil (7) (5A ) And β-phase coil (5
B) and the insulating sheet (6)
A pair of adjacent spiral conductors (51a) provided on one surface
Α-phase core consisting of X pairs of spiral conductors connected in series
The other side of the insulating pattern (6)
And a pair of adjacent spiral conductors (51b)
Β-phase coil consisting of X pairs of spiral conductors connected in series
A pattern (5b) and a spiral of the spiral conductor (51a)
The first through holes (53Aa, 53B
b) a detection coil having a detection phase coil (5) , wherein the detection phase coil (5) has the same diameter as the center of the spiral.
At a position between the spiral conductors (51a).
Of the spiral conductor (51b) and two first holes provided between the spiral conductors ( 51B) .
Through holes (53Aa, 53Bb)
Two α-phase outlets (52b) to be connected to each other and a first through hole connected to the α-phase outlet (52b).
(53Aa, 53Bb) except for the spiral conductor (51
b) First through holes (53A) provided between
a, 53Bb) connected to the pair of adjacent α-phase coils.
Α connecting wire (54b) connecting the two spiral conductors (51a) and two second
Through holes (53Ab, 53Ba)
Two β-phase outlets (52a) and a second through-hole connected to the β-phase outlet (52a).
(53Ab, 53Ba) except for the spiral conductor (51
a) A second through hole (53A) provided between
b, 53Ba) connected to the pair of adjacent β-phase coils.
And a β- phase transition wire (54a) for connecting the coil to the sheet coil type resolver.