JP2001194183A - Substrate type resolver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve detection sensitivity and realize the low consumption of excitation power by canceling a magnet flux generated in each winding pattern on a stator substrate by a magnet flux of a winding pattern separately installed. SOLUTION: A second stator sine winding pattern 5 is installed against a first stator sine winding pattern 4 installed on the stator substrate so that their magnet fluxes are canceled mutually. A second stator cosine winding pattern 7 is installed against a first cosine winding pattern 6 so that their magnet fluxes are canceled mutually. As a result, this substrate type resolver can realize lower consumption of excitation power 10a than a conventional one.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate-type resolver, and more particularly, to a stator-type resolver that cancels magnetic flux generated in a stator winding pattern formed on a stator substrate so that even small excitation power can be detected. The present invention relates to a novel improvement for reducing excitation power to a winding.

[0002]

2. Description of the Related Art Heretofore, as a substrate-type resolver of this type, a flat type structure in which windings are formed in a printed pattern is employed.

[0003]

In a conventional substrate-type resolver, a magnetic flux generated by a stator excitation winding is traversed by a rotor winding on the rotor substrate, so that a magnetic flux that changes according to the rotation angle of the rotor is generated on the stator substrate. Sin, cos
The changed magnetic flux was detected by the winding. Therefore, since the sin and cos windings on the stator substrate are formed in a printed pattern, there is no large inductance, and there is a magnetic flux generated there.Therefore, it is not sufficient to increase the excitation power for exciting the stator excitation windings Can not be detected
It has been difficult to meet the needs for low power consumption, that is, low power consumption.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, the present invention can detect even small excitation power by canceling magnetic flux generated in a stator winding pattern formed on a stator substrate. Accordingly, an object of the present invention is to provide a substrate type resolver in which the excitation power to the stator excitation winding is reduced.

[0005]

The substrate type resolver according to the present invention comprises a first stator sin winding pattern and a first stator c.
a stator substrate having an os winding pattern, a stator excitation winding provided at an outer peripheral position of the stator substrate, and a rotor substrate having a rotor winding pattern rotatably provided facing the stator substrate, In the resolver, a change in magnetic flux due to rotation of the rotor substrate is obtained as a rotation detection signal from the first stator sin winding pattern and the first stator cos winding pattern.
A first analog operational amplifier connected to the stator sin winding pattern, a second stator sin winding pattern connected to the output side of the first analog operational amplifier, and a second analog connected to the first stator cos winding pattern An analog operational amplifier; and a second stator cos winding pattern connected to an output side of the second analog operational amplifier, wherein the first stator sin winding pattern is formed by the second stator sin winding pattern and the second stator cos winding pattern. The magnetic flux generated in the line pattern and the second stator cos winding pattern is canceled to reduce the excitation power supplied to the stator excitation winding, and the rotor formed on the rotor substrate The winding pattern may be a first short-circuit pattern having both ends short-circuited or a second short-circuit pattern short-circuited via a capacitor. The first stator sin winding pattern and the first stator cos winding pattern formed on the stator substrate are formed so as to have a plurality of protrusions along the circumferential direction. And the stator substrate has a multilayer structure.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a substrate type resolver according to the present invention will be described below with reference to the drawings. FIG. 1 is an exploded view of a substrate-type resolver according to the present invention. In FIG. 1, reference numeral 1 denotes a rotor substrate formed of a printed circuit board. A line pattern 2 is formed. This rotor winding pattern 2 is, as shown in FIG.
In the case of the first short-circuit pattern in which both ends are directly short-circuited,
Alternatively, the second short-circuit pattern is short-circuited via the capacitor c.

A stator substrate 3 is provided to face the rotor substrate 1, and the stator substrate 3 is formed of a multi-layer plate (may be a single layer), and a plurality of protrusions 4a are formed in a circumferential direction. A first stator sin winding pattern 4, a second stator sin winding pattern 5, and a first stator cos winding pattern 6 and a second stator cos winding pattern 7 in which a plurality of protrusions 6a are formed in a circumferential direction are sequentially formed. Is formed. At an outer peripheral position of the stator substrate 3, a stator excitation winding 8 formed in a ring shape and performing excitation is disposed.

The above-described rotor substrate 1, stator substrate 3, and stator excitation winding 8 are provided with a stator substrate 3 opposed to the rotor substrate 1 in principle, as shown in FIG. 8 is provided at the outer peripheral position.

The substrate type resolver shown in FIGS. 1 and 2 is shown in FIG. 3 as an electrical equivalent circuit. That is, the excitation power 10 of the excitation power supply 10 is applied to the stator excitation winding 8.
a, and the first stator sin winding pattern 4
Is connected to a first analog operational amplifier 20 to output a sin analog output 21. A part of the sin analog output 21 is supplied to the second stator sin winding pattern 5 via a resistor R1.
Has been applied.

The second stator sin winding pattern 5 is configured to generate a magnetic flux in a direction to cancel the magnetic flux generated in the first stator sin winding pattern 4. The first stator cos winding pattern 6 includes:
A second analog operational amplifier 22 is connected, and a cos analog output 2 is output from the second analog operational amplifier 22. A part of the cos analog output 21A is applied to the second stator cos winding pattern 7 via the resistor R2.
The first stator cos winding pattern 6 is configured to generate a magnetic flux in a direction to cancel the magnetic flux generated.

Therefore, in the equivalent circuit configuration shown in FIG. 3, by supplying the exciting power 10a to the stator exciting winding 8, the magnetic flux generated in the stator exciting winding 8 is supplied to the rotor substrate 1
Of the rotor winding pattern 2 traverses, the magnetic flux changed by the rotation angle of the rotor substrate 1 is changed by the first stator sin winding pattern 4 and the first stator cos winding pattern 6 on the stator substrate 3. Is detected.

In the case described above, the magnetic flux generated by the first stator sin winding pattern 4 and the first stator cos winding pattern 6 by the magnetic flux generated by the second stator sin winding pattern 5 and the second stator cos winding pattern 7. Is canceled, the detection sensitivity of the change of the magnetic flux from the stator excitation winding 8 detected by each of the winding patterns 4 and 6 is improved as compared with the related art, so that the excitation power 10a is made smaller than the related art. Thus, sufficient rotation angle detection can be performed. Therefore, with the configuration described above, power consumption can be reduced as compared with the related art.

[0013]

Since the substrate type resolver according to the present invention is configured as described above, the following effects can be obtained. That is, since the magnetic flux generated by each winding pattern on the output side provided on the stator substrate is canceled, the sensitivity at the time of detection can be improved as compared with the conventional case,
It is possible to obtain a substrate-type resolver that has reduced excitation power and reduced power consumption.

[Brief description of the drawings]

FIG. 1 is an exploded view showing a substrate type resolver according to the present invention.

FIG. 2 is a schematic configuration diagram showing the entire configuration of FIG. 1;

FIG. 3 is an equivalent circuit diagram of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotor board 2 rotor winding pattern 3 stator board 4 first stator sin winding pattern 4a, 6a protrusion 5 second stator sin winding pattern 6 first stator cos winding pattern 7 second stator cos winding pattern 8 stator Excitation winding 10a Excitation power 20 First analog operational amplifier 22 Second analog operational amplifier c Capacitor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F063 AA35 CA15 CC04 EA03 GA07 GA22 GA28 GA33 GA38 GA67 2F077 AA36 FF03 FF16 FF34 FF39 NN02 NN16 PP26 QQ05 UU07

Claims (4)

[Claims] The first stator sin winding pattern (4) and the first stator sin winding pattern (4)
Stator substrate having stator cos winding pattern (6)
(3), a stator excitation winding (8) provided at an outer peripheral position of the stator substrate (3), and a rotor winding pattern (2) rotatably provided facing the stator substrate (3). A rotation detection signal (21) from the first stator sin winding pattern (4) and the first stator cos winding pattern (6) by detecting a change in magnetic flux due to rotation of the rotor substrate (1). ,twenty one
In the resolver obtained as A), a first analog operational amplifier (20) connected to the first stator sin winding pattern (4) and a second analog operational amplifier (20) connected to the output side of the first analog operational amplifier (20). 2 stator sin winding pattern (5),
The second stator connected to the first stator cos winding pattern (6)
An analog operational amplifier (22), and a second stator cos winding pattern (7) connected to an output side of the second analog operational amplifier (22), wherein the second stator sin winding pattern
(5) and the second stator cos winding pattern (7) cancel the magnetic fluxes generated in the first stator sin winding pattern (4) and the second stator cos winding pattern (6), so that the stator excitation winding Excitation power (10
A substrate-type resolver characterized by reducing a). 2. The rotor winding pattern (2) formed on the rotor substrate (1) is either a first short-circuit pattern whose both ends are short-circuited or a second short-circuit which is short-circuited via a capacitor (c). 2. The substrate type resolver according to claim 1, wherein the substrate type resolver comprises a mold pattern. 3. The first stator sin winding pattern (4) formed on the stator substrate (3) and the first stator cos
The winding pattern (6) has a plurality of protrusions (4a, 6
The substrate-type resolver according to claim 1, wherein the substrate-type resolver is formed to have a). 4. The substrate type resolver according to claim 1, wherein said stator substrate has a multilayer structure.