JPH10309066A - Brushless resolver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the machining accuracy of a stator transformer, to stabilize the magnetic coupling of the transformer, and to reduce the magnetic loss of the transformer, by constituting part of the transformer of a laminated section formed by laminating a plurality of stamped plates upon another. SOLUTION: A part of a stator transformer 3 is constituted of a laminated section 3a formed by laminating a plurality of ring-like stamped plates (obtained by press blanking magnetic metal plates) upon another, and the other part of the transformer 3 is constituted of a ring-like body 3b having an L-shaped cross section formed by machining a bar body. Since the part of the transformer 3 is constituted of the laminated section 3a formed by laminating stamped plates upon another, the accuracy of the section 3a is more remarkably improved than the case where the section 3a is formed by machining a round bar. In addition, the magnetic coupling between the transformer 3 and a rotor transformer 8 is stabilized and the leakage flux between the transformers 3 and 8 is reduced. Therefore, magnetic influences on a stator 5 for detector and a rotor 10 for detector are reduced and the detecting accuracy and efficiency of a brushless resolver are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless resolver, and more particularly, to improving a processing accuracy and stabilizing a magnetic coupling of a transformer by forming a part of a stator transformer into a laminated portion in which a plurality of press plates are laminated. The present invention relates to a novel improvement for obtaining an improvement in detection accuracy by obtaining the above.

[0002]

2. Description of the Related Art As a brushless resolver of this type which has been conventionally used, the structure shown in FIG. 3 is generally employed. That is, what is indicated by reference numeral 1 in FIG. 3 is a cylindrical case having a cylindrical overall shape, and a stator transformer 3 having a stator transformer winding 2 held by a bobbin 2a is provided on the inner surface of the cylindrical case 1. And a detector stator 5 having a detector stator winding 4. A hollow rotary shaft 6 is provided at a center position of the cylindrical case 1, and a rotor rotor 8 having a rotor transformer winding 7 and a detector rotor having a rotor winding 9 for a detector are provided on the outer surface of the rotary shaft 6. 10 are provided. Therefore, the transformer 11 is constituted by the stator transformer 3 and the rotor transformer 8 and the stator 5 for the detector is formed.
Detector (resolver) 12 by means of the detector rotor 10
And the input and output of signals to and from the detector 12 are performed through the transformer 11 in a known manner.

[0003]

Since the conventional brushless resolver is configured as described above, there are the following problems. That is, the stator transformer is
Since the round bar of Muku was turned into a cylindrical shape and then turned to form a U-shaped cross section, the processing cost increased, it was difficult to maintain high processing accuracy, and the rotor transformer when configuring a transformer However, the electrical characteristics of signal input / output were not sufficient due to poor magnetic coupling and large magnetic loss.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In particular, by forming a part of a stator transformer as a laminated portion in which a plurality of press plates are laminated, it is possible to improve processing accuracy. An object of the present invention is to provide a brushless resolver in which detection accuracy is improved by obtaining stable magnetic coupling of a transformer and reducing magnetic loss.

[0005]

SUMMARY OF THE INVENTION A brushless resolver according to the present invention comprises a stator transformer and a detector stator provided on the inner surface of a cylindrical case, and a rotor transformer provided rotatably at the center of the cylindrical case. And a rotary shaft having a rotor for a detector, wherein a part of the stator transformer is formed of a laminated portion in which a plurality of press plates are laminated.

More specifically, the stator transformer has a structure in which the laminated portion has a single annular plate shape, and the other portion has an L-shaped annular shape with an L-shaped cross section and is turned. It is.

More specifically, in the stator transformer, the laminated portion has a shape of two annular plates, and the other portion has a cylindrical shape and a turned cylindrical shape. This is a configuration sandwiched by the laminated portions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a brushless resolver according to the present invention will be described below with reference to the drawings. Note that the same or equivalent parts as those in the conventional example will be described using the same reference numerals. In FIG. 1, reference numeral 1 designates a cylindrical case having a cylindrical shape as a whole. On the inner surface of the cylindrical case 1, a stator transformer 3 having a stator transformer winding 2 held by a bobbin 2a and a detection device A detector stator 5 having a dexterous stator winding 4 is provided. A hollow rotary shaft 6 is provided at a center position of the cylindrical case 1, and a rotor rotor 8 having a rotor transformer winding 7 and a detector rotor having a rotor winding 9 for a detector are provided on the outer surface of the rotary shaft 6. 10 are provided.
Therefore, the transformer 11 is constituted by the stator transformer 3 and the rotor transformer 8, and the detector (resolver) 1 is constituted by the detector stator 5 and the detector rotor 10.
2 and the input and output of signals to and from the detector 12 are performed through the transformer 11 as is well known.

The stator transformer 3 is configured as shown in FIG. 1 or 2 unlike the conventional configuration shown in FIG. That is, in the case of the configuration of FIG.
Has a laminated portion 3a formed by laminating a plurality of annular press plates (a configuration in which a magnetic plate material is punched into a circular plate shape by pressing), and the other portion has an L-shaped cross section and a rod. L-shaped annular body 3b formed by turning from the body. Therefore, the only part to be turned from the rod body is the L-shaped annular body 3b in section, and the stator transformer 3 is formed by joining the laminated portion 3a to the L-shaped annular body 3b with conductive adhesive or brazing. doing.

In the case of the structure shown in FIG.
The stator transformer 3 is constituted by a cylindrical body 3c which is turned into a cylindrical shape between the laminated portions 3a, 3a.
The stator transformer winding 2 is held on a bobbin 2a.

[0011]

As described above, the brushless resolver according to the present invention has the following advantages. In other words, since a part of the stator transformer is composed of a laminated portion of press plates that have been pressed, the accuracy is greatly improved compared to the conventional turning processing from a round bar, and the magnetic coupling between the stator transformer and the rotor transformer is stabilized. ,
Since the leakage magnetic flux between the transformers is reduced, the magnetic influence on the detector stator and the detector rotor is reduced, the eddy current inside the transformer can be reduced, and the magnetic loss is reduced. Detection accuracy and efficiency are improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a brushless resolver according to the present invention.

FIG. 2 is a sectional view showing another example of FIG.

FIG. 3 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical case 3 Stator transformer 3a Lamination part 3b L-shaped annular body 3c cylindrical body 5 Detector stator 6 Rotating shaft 8 Rotor transformer

Claims (3)

[Claims] A stator transformer (3) and a detector stator (5) provided on the inner surface of a cylindrical case (1), and a rotor provided rotatably at the center of the cylindrical case (1). Rotary shaft having transformer (8) and detector rotor (10)
(6) The brushless resolver according to (1), wherein a part of the stator transformer (3) comprises a laminated portion (3a) in which a plurality of press plates are laminated. 2. The stator transformer (3), wherein the laminated portion (3a) has a single annular plate shape, and the other portion has an L-shaped cross section and is L-shaped in cross section and is turned. (3b)
The brushless resolver according to claim 1, wherein 3. The stator transformer (3), wherein the laminated portion (3a) has a shape of two annular plates, and the other portion has a cylindrical shape and a turned cylindrical body (3c), The cylinder (3c)
2. A brushless resolver according to claim 1, wherein said brushless resolver is sandwiched between said laminated portions.