JP2507694Y2 - Resolver - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a resolver, and in particular,
The present invention relates to a new improvement in which a magnetic wire is used as a magnetic shield between a detector and a rotary transformer.

[0002]

2. Description of the Related Art There are various resolvers of this type which have been used in the past, and one of them is JP-A-63-
The configuration of the 318725 publication can be schematically shown in FIG. That is, what is denoted by reference numeral 1 in FIG. 2 is a casing whose overall shape is a tubular shape, and a detector stator 2 and a stator transformer 3 are provided on an inner wall 1a of the casing 1 in a state of being separated from each other in the axial direction. Has been. The detector stator 2 is a detector stator winding 2
In addition to having a, the stator transformer 3 has a stator transformer winding 3a. Further, a rotary shaft 4 is rotatably provided in the casing 1, and a detector rotor 5 and a rotor transformer 6 are provided on the outer periphery of the rotary shaft 4 in a state of being axially separated from each other. . The detector rotor 5 has a detector rotor winding 5a, and the rotor transformer 6 has a rotor transformer winding 6a. Therefore, the input / output of the signal to / from the detector rotor winding 5a is performed via the rotary transformer 7 including the transformer stator 3 and the rotor transformer 6.

[0003]

Since the conventional resolver is configured as described above, the following problems exist. That is, since no magnetic shield is provided between the detector side and the rotary transformer side, they may interfere with each other, and it is extremely difficult to improve the accuracy of the rotation detection signal.

The present invention has been made to solve the above problems, and in particular, it is an object of the present invention to provide a resolver in which a magnetic wire is used as a magnetic shield between a detector and a rotary transformer. And

[0005]

A resolver according to the present invention comprises a detector stator and a stator transformer provided on an inner wall of a casing, and a rotary shaft having a detector rotor and a rotor transformer provided in the casing. In the resolver, a holding ring 10 provided on the detector stator 2 and having a length in the axial direction, a first magnet wire 11 held by the holding ring 10 and wound a large number around one surface 3b of the stator transformer 3, A plurality of windings are provided on one surface 6b of the rotor transformer 6, and
A second magnet wire 12 having an outer diameter smaller than that of the magnet wire 11; and a magnetic shield is provided between the detector stator and the stator transformer and between the detector rotor and the rotor transformer by the magnet wires. is there.

[0006]

In the resolver according to the present invention, the magnet wire is arranged between the detector stator and the stator transformer and between the detector rotor and the rotor transformer.
The leakage magnetic flux from the rotary transformer can be reduced, and the detection accuracy of the detector can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the resolver according to the present invention will be described in detail below with reference to the drawings. It should be noted that the same or equivalent parts as those of the conventional example will be described using the same reference numerals.

In FIG. 1, reference numeral 1 denotes a casing whose overall shape is a tubular shape. The casing 1 has an inner wall 1a in which a detector stator 2 and a stator transformer 3 are axially separated from each other. It is provided.

The detector stator 2 has a detector stator winding 2a and the stator transformer 3 has a stator transformer winding 3a. The detector stator 2 has an axial length. A retaining ring 10 having is provided.

On one surface 3b of the stator transformer 3,
A large number of the first magnet wires 11 are wound in a short-circuited state, and the first magnet wires 11 are held by the holding ring 10 as well as the rotor transformer 6 described later.
A second magnet wire 12 having a structure similar to that of the first magnet wire 11 and having a diameter smaller than the outer diameter of the first magnet wire 11 is disposed on one surface 6b.

Further, a rotary shaft 4 is rotatably provided in the casing 1, and a detector rotor 5 and a rotor transformer 6 are provided on the outer periphery of the rotary shaft 4 in a state of being axially separated from each other. Has been.

The detector rotor 5 has a detector rotor winding 5a, and the rotor transformer 6 has a rotor transformer winding 6a.

Therefore, one surface 3 of the stator transformer 3
b and the one surface 6b of the rotor transformer 6, the first and second magnet wires 11 and 12 are located as described above.
Performs a magnetic shield between the detector stator 2 and the stator transformer 3 and a magnetic shield between the detector rotor 5 and the rotor transformer 6.

Therefore, it is possible to prevent mutual interference due to the leakage magnetic flux between the detector 13 including the detector stator 2 and the detector rotor 5 and the rotary transformer 7 including the stator transformer 3 and the rotor transformer 6.

[0015]

Since the resolver according to the present invention is configured as described above, the magnetic flux shield between the detector and the rotary transformer is completely performed by the magnet wire, and a highly accurate rotation detection signal can be obtained. .

[Brief description of drawings]

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

FIG. 2 is a half sectional view showing a conventional resolver.

[Explanation of symbols]

 1 casing 1a inner wall 2 detector stator 3 stator transformer 4 rotary shaft 5 detector rotor 6 rotor transformer 11 first magnet wire 12 second magnet wire

Claims (1)

(57) [Scope of utility model registration request] 1. A detector stator (2) and a stator transformer (3) provided on an inner wall (1a) of a casing (1), and a detector rotor (5) and a rotor transformer provided in the casing (1). In a resolver having a rotating shaft (4) having (6), a holding ring (10) provided in the detector stator (2) and having an axial length, and held by the holding ring (10). A plurality of first magnet wires (11) wound around one surface (3b) of the stator transformer (3);
(6) a second magnet wire (12) wound around the one surface (6b) in a large number of turns and having an outer diameter smaller than that of the first magnet wire (11), and the detector stator (2) ) And the stator transformer (3) and between the detector rotor (5) and the rotor transformer (6) are magnetically shielded by the magnet wires (11, 12).