JP2012220443A - Segment resolver - Google Patents

Abstract

An object of the present invention is to complete a flow of magnetic flux for each slot by providing a slot between a pair of magnetic poles arranged along the axial direction of a rotor core.
A segment resolver according to the present invention includes a SIN output stator core (1M) and a COS output stator core (1N) of a segment stator core (1) approaching an outer peripheral surface (2a) of a rotor core (2) in an axial direction. (C), and by forming slots (1A, 1C) between the magnetic poles (3), the magnetic flux flow (A) is completed for each slot (1A, 1C), and each stator core (1M , 1N) is connected by the connecting body (10).
[Selection] Figure 1

Description

  The present invention relates to a segment resolver, and in particular, by providing a slot between a pair of magnetic poles arranged along the axial direction of a rotor core, the flow of magnetic flux is completed for each slot, thereby stabilizing the flow of magnetic flux. For new improvements.

Conventionally, as a resolver that has been used, for example, there is a configuration disclosed in Patent Document 1, but a part of the ring-shaped stator of this resolver is cut, leaving only a predetermined angle range corresponding to the outer peripheral surface of the rotor. A configuration using the segmented stator core is disclosed as Patent Document 2 as shown in FIG.
That is, what is indicated by reference numeral 1 in FIG. 4 is a segment stator core having a shape only in a predetermined angle range corresponding to the variable reluctance rotor core 2, and the inner surface 1a of the segment stator core 1 is directed inward. A plurality of magnetic poles 3 projecting in this manner are provided at predetermined angular intervals.

Each magnetic pole 3 is provided with a stator winding 4 via an insulating cover (not shown), and the axial center position of the rotor core 2 is set so as to be shifted from the axial center position of the segment stator core 1. It is arranged with heart.
The stator winding 4 is constituted by a combination of an excitation winding and an output winding (not shown) as is well known.

  Therefore, in the above-described conventional configuration, when the rotor core 2 rotates, the gap permeance in the gap between the outer periphery 2a of the rotor core 2 and each magnetic pole 3 changes, and the change in the magnetic flux of each magnetic pole 3 due to the change in the gap permeance. The rotation angle of the rotor core 2 was detected by detecting the change in the output voltage due to

Japanese Patent Laid-Open No. 2002-168652

Since the conventional segment resolver is configured as described above, the following problems exist.
That is, since the segment stator core 1 only corresponds to a predetermined angle range, the magnetic flux flow A flowing between the magnetic poles 3 and the rotor core 2 is different from the magnetic flux flow A in the slots 1A other than both ends of the segment stator core 1. Although it completes and becomes a normal flow, in the slots 1B at both ends of the segment stator core 1, as indicated by the magnetic flux flow B, the balance of the flow of magnetic flux becomes poor, and the flow of magnetic flux as in the magnetic flux flow A It was not completed, and the adverse effect on the accuracy of rotation angle detection was great.

  A segment resolver according to the present invention includes a stator core disposed in a state of approaching an outer peripheral surface of a rotor core, and a stator winding provided on the stator core, and the stator core is an angle of a part of the outer peripheral surface of the rotor core. In a segment resolver comprising a segment stator core disposed only corresponding to the range, the segment stator core has a SIN output having a first slot formed between a pair of magnetic poles provided along the axial direction of the outer peripheral surface. The COS output stator core having a second slot formed between a pair of magnetic poles provided along the axial direction of the outer peripheral surface, the SIN output stator core, and the COS output stator core are connected to each other. And a magnetic flux flow is completed in each slot. In addition, the SIN output stator core and the COS output stator core are configured so that the overall shape is a U-shape, and the rotor core has irregularities whose shape changes along the circumferential direction on the outer peripheral surface. It is the structure which consists of a variable reluctance type rotor which has a surface.

Since the segment resolver according to the present invention is configured as described above, the following effects can be obtained.
That is, a stator core disposed in a state of being close to the outer peripheral surface of the rotor core, and a stator winding provided on the stator core, and the stator core corresponds to only a part of the angular range of the outer peripheral surface of the rotor core. In the segment resolver comprising the segment stator core disposed in the above-described manner, the segment stator core includes a SIN output stator core having a first slot formed between a pair of magnetic poles provided along the axial direction of the outer peripheral surface; A COS output stator core having a second slot formed between a pair of magnetic poles provided along the axial direction of the outer peripheral surface, and a connecting body for connecting the SIN output stator core and the COS output stator core. When the flow of magnetic flux is completed for each slot, the magnetic field of each slot is The amount of non-uniformity can be eliminated, and the space required to install the stator core in the circumferential direction can be greatly reduced. Can greatly contribute to improving the maintainability of the segment resolver.
In addition, since the SIN output stator core and the COS output stator core are made of a U-shape, the shape of the segment stator core can be minimized, and the overall shape of the segment resolver can be greatly reduced. Can be
Further, the rotor core is made of a variable reluctance type rotor having an irregular surface whose shape changes along the circumferential direction on the outer peripheral surface, thereby obtaining a configuration with a small number of windings and a simple structure. Can do.

It is a perspective view which shows the whole structure of the segment resolver by this invention. It is sectional drawing of the principal part of FIG. FIG. 2 is an enlarged plan view of FIG. 1. It is a top view of the principal part which shows the conventional segment resolver.

  The present invention provides a segment resolver that stabilizes the flow of magnetic flux by having a slot between a pair of magnetic poles arranged along the axial direction of the rotor core to complete the flow of magnetic flux for each slot. The purpose is to provide.

Hereinafter, preferred embodiments of a segment resolver according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
In FIG. 1, what is indicated by reference numeral 2 is a known variable reluctance (VR) type rotor core, and the outer circumferential surface 2a of the rotor core 2 is detected in the circumferential direction for detection at a required shaft angle multiplier (nX). An uneven surface 2A whose shape changes along 2B is formed.

A segment stator core 1 having a SIN output stator core 1M and a COS output stator core 1N is disposed at a position close to the outer peripheral surface 2a of the rotor core 2.
The stator cores 1M and 1N are configured in exactly the same shape, and as shown in FIGS. 1 and 2, the overall shape is formed in a U-shape, and a pair of magnetic poles 3 are integrally formed at both ends thereof.

As is well known, each magnetic pole 3 is wound with a stator winding 4 composed of an excitation winding 4 a and an output winding 4 b, and the tip surface 3 a of each magnetic pole 3 approaches the outer peripheral surface 2 a of the rotor core 2. Arranged.
As shown in FIGS. 1 and 2, each of the stator cores 1M, 1N is formed with one first or second slot 1A or 1C between each pair of magnetic poles 3, and the length of each stator core 1M, 1N. The direction L is provided along the axial direction C of the rotor core 2.

  As shown in FIG. 3, the stator cores 1M and 1N are connected to each other in a state of being separated from each other along the circumferential direction 2B of the rotor core 2 by a connecting body 10 having a longitudinal shape. When the segment resolver 11 is viewed in plan as shown in FIG. 3, the connecting body 10 has an overall U-shape, and the segment stator core 1 is a partial angular range of the outer peripheral surface 2 a of the rotor core 2. It is arranged corresponding to only θ.

In the above-described configuration, when the segment resolver 11 of the present invention is operated, the magnetic flux flow A generated by applying an excitation signal to the excitation winding 4a of the stator winding 4 is as shown in FIG. It is completed by drawing a loop in each of the slots 1A and 1C of 1M and 1N, and the strength change of the magnetic flux flow A that changes as the rotor core 2 rotates is detected by the output winding 4b as a two-phase output voltage. As is well known, the rotation angle of the rotor core 2 can be detected.
In addition, by arranging a plurality of segment stator cores 1 having the above-described two-phase configuration along the circumferential direction of the outer peripheral surface 2a of the rotor core 2, a multiple redundant segment resolver 11 can be configured. . Moreover, it contributes to high precision as a merit of using a plurality.

  The segment resolver according to the present invention can easily configure a segment resolver from 1X to nX and a redundant segment resolver.

1 segment stator core 1a inner surface 1A, 1C first and second slots 1M SIN output stator core 1N COS output stator core L length direction C axial direction A magnetic flux flow 2 rotor core 2a outer peripheral surface 2B circumferential direction 3 magnetic pole 3a front end surface 4 stator Winding 4a Excitation winding 4b Output winding 10 Connection 11 Segment resolver θ Angular range

Claims (3)

A stator core disposed close to the outer peripheral surface (2a) of the rotor core (2), and a stator winding (4) provided on the stator core, the stator core being an outer peripheral surface of the rotor core (2) In the segment resolver consisting of the segment stator core (1) arranged corresponding to only a part of the angular range (θ) of (2a),
The segment stator core (1) is a SIN output stator core having a first slot (1A) formed between a pair of magnetic poles (3) provided along the axial direction (C) of the outer peripheral surface (2a). 1M), a COS output stator core (1N) having a second slot (1C) formed between a pair of magnetic poles (3) provided along the axial direction (C) of the outer peripheral surface (2a), A connection body (10) for connecting the SIN output stator core (1M) and the COS output stator core (1N), and a magnetic flux flow (A) is provided for each slot (1A, 1C). A segment resolver characterized by completeness.   The segment resolver according to claim 1, wherein the SIN output stator core (1M) and the COS output stator core (1N) have a U-shape as a whole.   The said rotor core (2) consists of a variable reluctance type rotor which has the uneven | corrugated surface (2A) from which a shape changes to the said outer peripheral surface (2a) along the circumferential direction (2B). The segment resolver described.

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