JP2016035416A - Resolver stator structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate fitting of a resolver, and to improve detection accuracy, by widening partially a gap between a projection magnetic pole of a ring-shaped stator and a rotor.SOLUTION: A resolver stator structure has a constitution in which at least one first projection length (L) between each projection magnetic pole (2, 2A) is shortened furthermore than the other, or a recess (12C) and a salient (12B) are formed on the apical surface (12a) of a magnetic pole flange part (12) of at least one projection magnetic pole (2), to thereby enlarge a gap (G) between a rotor (6) and a ring-shaped stator (1), partially more than the other parts.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a resolver stator structure, and in particular, the protruding length of at least one protruding magnetic pole of each protruding magnetic pole of a ring-shaped stator is shorter than the other protruding magnetic poles, or the tip of at least one protruding magnetic pole The present invention relates to a novel improvement for forming a concave portion and a convex portion on the surface and partially increasing a gap to secure a winding space and improve detection accuracy at the time of mounting (for example, stator eccentricity).

As this type of resolver stator structure conventionally used, for example, the configuration shown in Patent Document 1 can be shown in FIGS.
That is, what is denoted by reference numeral 1 in FIG. 10 is a ring-shaped stator having an outer diameter formed with a predetermined diameter, and the inner peripheral surface 1a of the ring-shaped stator 1 is directed inward at a predetermined angular interval. A plurality of projecting magnetic poles 2 projecting are provided via slots 8, and a stator winding 4 is wound around the outer periphery of each projecting magnetic pole 2 via a ring-shaped insulating cover 3.

Inside each projecting magnetic pole 2 of the ring-shaped stator 1, a ring-shaped rotor 6 having a multiple angle of nX continuously having a plurality of chevron portions 5a is rotatably provided via a rotating shaft 7.
The main part of the resolver stator structure 10 shown in FIG. 10 is enlarged and shown in FIG. 11, and the first protruding lengths L1 of the protruding magnetic poles 2 provided on the annular stator ₁ are all the same. The first circular locus 1c indicating the outer diameter 1b of the annular stator 1 and the second circular locus 1e connecting the tip end surfaces 2A of the magnetic pole flanges 2a of the protruding magnetic poles 2 indicating the inner diameter 1d of the annular stator 1 are mutually connected. It is formed concentrically.

  Therefore, the gap G between the second circular locus 1e indicating the inner diameter 1d of the annular stator 1 and the outer diameter 6a of the rotor 6 is configured to be the same over the entire circumference.

Japanese Patent No. 4418475

Since this type of resolver stator structure used heretofore has been configured as described above, the following problems existed.
That is, generally, the wider the gap G between the inner diameter 1d of the annular stator 1 and the outer diameter 6a of the rotor 6, the detection of the resolver caused by the attachment error when the annular stator 1 is attached to a device or a motor housing. Although it is known that accuracy degradation can be suppressed, when the gap is widened, the output voltage is lowered, the winding amount is abnormally increased, and the mass productivity is deteriorated. For example, as shown in FIG. 10, when the rotor 6 has a large inner diameter, a large-diameter rotating shaft 7 is fitted, and the outer diameter 1b of the annular stator 1 is relatively small, the outer circumference of each protruding magnetic pole 2 Since there was only a method for reducing the space for the stator winding 4 to be wound around the stator winding, it was difficult to neatly arrange the stator windings neatly, and as a result, the detection accuracy as a resolver had to be lowered. .

  The present invention has been made to solve the above-described problems, and in particular, is the projection length of at least one of the projecting magnetic poles of the annular stator shorter than the other projecting magnetic poles? Or, at least one projecting magnetic pole is formed with a concave portion and a convex portion on the tip surface, and a gap is partially enlarged to secure a winding space or prevent an abnormal increase in the amount of winding, and detection accuracy at the time of stator eccentricity It is an object of the present invention to provide a resolver stator structure that can improve the above.

  A resolver stator structure according to the present invention includes a circular ring-shaped stator having a plurality of protruding magnetic poles protruding inward at predetermined angular intervals and having a predetermined diameter, and formed at the tip of each of the protruding magnetic poles. And a stator winding wound around each projecting magnetic pole and positioned inside the magnetic pole flange, and a resolver in which a rotor is rotatably disposed inside the annular stator. In the stator structure, a first protruding length of at least one of the protruding magnetic poles is shorter than a second protruding length of the other protruding magnetic poles, or the at least one of the protruding magnetic poles. By forming a concave portion and a convex portion on the tip surface of the magnetic pole flange at the tip of the magnetic pole, the gap between the rotor and the ring-shaped stator is partially larger than the other portions, and The concave portion and the convex portion on the front end surface of the magnetic pole flange are configured to be divided with the central position in the circumferential direction of the front end surface as a boundary, and the concave portions and the protruding magnetic poles adjacent to each other, and The position of the convex portion is a configuration in which the concave portions and the convex portions are directly adjacent to each other, and the concave portion and the convex portion formed on the tip surface of the magnetic pole flange portion of each protruding magnetic pole are respectively The thick wall portion and the thin wall portion are continuously formed by inclining the front end surface of the magnetic pole flange portion of the protruding magnetic pole from one end to the other end along the circumferential direction. It is formed to be inclined, the thick part forms the convex part, the thin part forms the concave part, and the positions of the concave part and the convex part in the protruding magnetic poles adjacent to each other are as follows: The convex part and the concave part are directly adjacent, or The convex portions are directly adjacent to each other, and the concave portions are directly adjacent to each other, and the front end surface of the magnetic pole flange portion of the protruding magnetic pole has an outer diameter of the annular stator having a predetermined diameter. An arc-shaped recess that forms a crescent-shaped space is formed with respect to the second circular locus that is concentric with the first circular locus and has a small diameter, and one end of the tip-shaped surface along the circumferential direction of the annular stator, and the like A pair of protrusions are formed in contact with the second circular locus, and the arc-shaped recesses form the recesses. A step portion is formed at a position orthogonal to the circumferential direction and along the axial direction of the ring-shaped stator, and the convex portion and the concave portion that are separated by the step portion and extend along the circumferential direction are formed. It is the composition which is.

Since the resolver stator structure according to the present invention is configured as described above, the following effects can be obtained.
That is, a circular annular stator having a plurality of projecting magnetic poles projecting inward at predetermined angular intervals and having a predetermined diameter, and a magnetic pole formed at the tip of each projecting magnetic pole and extending in the circumferential direction of the annular stator And a resolver stator structure in which a rotor is rotatably disposed inside the annular stator, and a stator winding wound around each protruding magnetic pole and positioned inside the magnetic pole collar. The first protruding length of at least one of the protruding magnetic poles is shorter than the second protruding length of the other protruding magnetic poles, or the magnetic pole at the tip of the at least one protruding magnetic pole Stator windings that are wound around the projecting magnetic poles by forming a recess and a projection on the front end surface of the flange portion, thereby making the gap between the rotor and the annular stator partially larger than other portions. Amount (i.e., space for the winding) is securable more than the conventional, it is possible to obtain an ideal detection accuracy.
In addition, it is possible to suppress deterioration in accuracy due to the attachment effect when the resolver is attached to the other party.
In addition, since the concave portion and the convex portion of the tip surface of the magnetic pole flange portion are divided and formed with the central position in the circumferential direction of the tip surface as a boundary, irregularities are formed on the tip surface. The same effects as described above can be obtained.
In addition, since the concave portions and the convex portions in the projecting magnetic poles adjacent to each other are configured so that the concave portions and the convex portions are directly adjacent to each other, unevenness is formed on the tip surface. The same effect can be obtained.
Further, since the concave portion and the convex portion formed on the front end surface of the magnetic pole flange portion of each protruding magnetic pole have a plurality of configurations, the concave and convex portions can be easily formed on the front end surface. The effect of can be easily obtained.
Further, by inclining the front end surface of the magnetic pole flange portion of the projecting magnetic pole from one end to the other end along the circumferential direction, a thick portion and a thin portion are continuously inclined, and the thickness is increased. By having the structure in which the meat part forms the convex part and the thin part forms the concave part, it is possible to easily obtain the concavo-convex part continuous to the front end surface, and to obtain the same effect as described above. .
Further, the positions of the concave portions and the convex portions in the respective protruding magnetic poles adjacent to each other are such that the convex portions and the concave portions are directly adjacent to each other, or the convex portions are directly adjacent to each other, and the concave portions are directly adjacent to each other. Due to the configuration, the same effects as described above can be obtained.
Further, the tip surface of the magnetic pole flange portion of the protruding magnetic pole has a crescent shape with respect to a second circular locus having a predetermined diameter and concentric with a first circular locus indicating the outer diameter of the annular stator. An arc-shaped recess that forms a space is formed, and one end and the other end of the ring-shaped stator of the tip surface along the circumferential direction are in contact with the second circular locus, and a pair of the protrusions are formed, and the arc-shaped recess is the By forming the concave portion, the concave and convex portion can be easily formed on the tip surface, and the same effect as described above can be obtained.
Further, a stepped portion is formed at a position perpendicular to the circumferential direction and along the axial direction of the annular stator on the tip surface of the magnetic pole flange portion of the projecting magnetic pole, and is divided by the stepped portion and By forming the convex portion and the concave portion extending along the direction, the concave and convex portion can be easily formed on the tip surface, and the same effect as described above can be obtained.

It is a top view of the principal part which shows the resolver stator structure by this invention. It is a top view which shows the other form of FIG. It is a top view which shows the other form of FIG. It is a top view which shows the other form of FIG. It is a top view which shows the other form of FIG. It is a top view which shows the other form of FIG. It is a top view which shows the other form of FIG. It is a top view which shows the other form of FIG. It is AA sectional drawing of FIG. It is a top view of a conventional structure. It is an enlarged plan view of the principal part of FIG.

  In the resolver stator structure according to the present invention, the projecting length of at least one projecting magnetic pole of each projecting magnetic pole of the ring-shaped stator is shorter than the other projecting magnetic poles, or at the front end surface of at least one projecting magnetic pole. A recess and a protrusion are formed, and a gap is partially enlarged to secure a winding space and improve detection accuracy.

Hereinafter, preferred embodiments of a resolver stator structure according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is demonstrated to the part which is the same as that of a prior art example, or an equivalent part.
In FIG. 1, what is indicated by reference numeral 1 is a ring-shaped stator having an outer diameter of a predetermined diameter and formed in a perfect circular ring shape. A plurality of projecting magnetic poles 2 and other projecting magnetic poles 2A projecting in the direction are provided.

A magnetic pole flange 12 extending along the circumferential direction 11 of the annular stator 1 is formed at the tips of the protruding magnetic poles 2 and 2A.
Wherein the first protrusion length L ₁ of the projecting magnetic poles 2 of at least one of the projecting magnetic poles 2 are formed shorter than the second protrusion length L ₂ of the other protruding pole 2A.
That is, between the tip end surface 12a of each magnetic pole flange 12 of the other protruding magnetic pole 2A and between the inner diameter line 13 indicating the inner diameter of the annular stator 1 and the tip surface 12a of the magnetic pole flange 12 of the protruding magnetic pole 2A. pole gap G ₁ is formed in.

That is, since the rotor 6 shown in FIGS. 10 and 11 is rotatably provided inside the inner diameter line 13, the tip end surfaces 12 a of all the projecting magnetic poles 2 and 2 A in FIG. , if it is identical to the position of the inner diameter wire 13, as in the conventional, since the outer diameter 6a of the distal end surface 12a and the rotor 6 is small gaps G ₁ over the entire circumference, laden conventional problems Although the structure of the left, is formed shorter than the second protrusion length L ₂ of at least one first protrusion length L ₁ of the projecting magnetic pole 2 (s it may) other salient-pole 2A Thus, a magnetic pole gap G1 different from the conventional _one is formed.

Therefore, the tip surface 12a of the protruding magnetic pole 2 with respect to the outer diameter 6a of the rotor 6 has a larger gap G (FIG. 11) than the tip surface 12a of the other protruding magnetic pole 2A. When the annular stator 1 is attached to a device or the like, even if a positional deviation or the like occurs in the annular stator 1, the gap G is partially widened and sufficient stator winding 4 is provided for the other protruding magnetic pole 2A. Since the winding is wound, unlike the conventional case, the detection accuracy is hardly adversely affected, and good accuracy can be maintained while minimizing an increase in the amount of winding.
In the embodiment of FIG. 1, the case where the first protruding length L _{1 of} at least one protruding magnetic pole 2 is shorter than the other is described. If the projecting length L ₁ is set to, i.e., one in which a sufficient effect can be obtained when partially adopted for the whole of the annular stator 1.

FIG. 2 is a configuration showing another form of FIG. 1. The same parts as those in FIG. 1 are denoted by the same reference numerals, description thereof is omitted, and only different parts will be described. The protruding lengths L of the protruding magnetic poles 2 are all the same, but a convex portion 12B and a concave portion 12C are formed on the tip surface 12a of the magnetic pole flange 12 of each protruding magnetic pole 2.
That is, the concave portion 12C and the convex portion 12B of the distal end surface 12a of the magnetic pole flange 12 are classified with the central position 20 in the circumferential direction 11 of the distal end surface 12a as a boundary 20A (formed in a step shape). It is formed by.

  In FIG. 2 described above, the positions of the concave portions 12C and the convex portions 12B in the protruding magnetic poles 2 adjacent to each other are configured such that the concave portions 12C and the convex portions 12B are directly adjacent to each other. The length of each recess 12C in the circumferential direction is the same as that of the above-described form of FIG. 1, and the same effect as the configuration of FIG. Each protruding magnetic pole 2 has a convex portion 12B and a concave portion 12C. However, when viewed as a whole of the annular stator 1, the concave portion 12C for forming the gap G is partially formed.

FIG. 3 is a configuration showing another form of the form of FIG. 2, the same parts as those in FIG. 2 are denoted by the same reference numerals, description thereof will be omitted, and only different parts will be described.
That is, in FIG. 3, each of the projecting magnetic poles 2 has a plurality of convex portions 12B and concave portions 12C formed on the tip surface 12a of the magnetic pole flange portion 12, and in the configuration of FIG. 12B is located at both ends in the circumferential direction 11.
In the form of FIG. 4, the recesses 12 </ b> C are located at both ends of the magnetic pole flange 12 in the circumferential direction 11.

FIG. 5 is a configuration showing another form of the form of FIG. 2, the same parts as those of FIG. 2 are denoted by the same reference numerals, description thereof will be omitted, and only different parts will be described.
That is, in FIG. 5, the thin wall portion 12m and the thick wall portion formed on the tip surface 12a of the magnetic pole flange portion 12 of each protruding magnetic pole 2 are inclined along the circumferential direction 11 from one end 12M toward the other end 12N. 12n is formed continuously, and the thick portion 12n forms a convex portion 12B.
FIG. 6 shows a case where the magnetic pole flange 12 is formed with the positions of the thick portion 12n and the thin portion 12m in each protruding magnetic pole 2 being opposite positions.

  5 and 6, the positions of the concave portions 12C and the convex portions 12B in the respective protruding magnetic poles 2 adjacent to each other are such that the convex portions 12B and the concave portions 12C are directly adjacent to each other, or the convex portions 12B are directly adjacent to each other. In addition, the recesses 12C are directly adjacent to each other.

FIG. 7 shows another embodiment shown in FIGS. 5 and 6. The tip end surface 12a of the magnetic pole flange 12 of each protruding magnetic pole 2 has an outer diameter of the annular stator 1 having a predetermined diameter. The first circular locus 1c indicating 1b is formed with a concave portion 12C composed of an arc-shaped concave portion 26 for forming a crescent-shaped space 25 with respect to the second circular locus 1e that is concentric with the second circular locus 1e. One end 12M and the other end 12N of the front end surface 12a along the circumferential direction 11 of the annular stator 1 are in contact with the second circular locus 1e indicating the inner diameter 1d to form a pair of convex portions 13B, and the arc-shaped concave portion 26 is formed. A recess 12C is formed.
Therefore, the same effect as each above-mentioned form can be acquired by the said convex part 12B and the recessed part 12C.

8 and 9 show another form of the form of FIG.
That is, on the tip surface 12 a of the magnetic pole flange portion 12 of each protruding magnetic pole 2, the stepped portion 40 is at an arbitrary position P ₁ such as the center perpendicular to the circumferential direction 11 and along the axial direction P of the annular stator 1. And the convex portion 12C and the concave portion 12B which are divided by the stepped portion 40 and extend along the circumferential direction 11 are formed. The same effect as the form can be obtained.

  In the resolver stator structure according to the present invention, the projecting length of at least one projecting magnetic pole of each projecting magnetic pole of the ring-shaped stator is shorter than the other projecting magnetic poles, or at the front end surface of at least one projecting magnetic pole. Resolver mounting can be facilitated by forming recesses and projections and partially increasing the gap to secure winding space and improve detection accuracy.

DESCRIPTION OF SYMBOLS 1 Ring-shaped stator 1a Inner peripheral surface 1c 1st circular locus (outer diameter 1b)
1e Second circular locus (inner diameter 1d)
2 Protruding magnetic pole 2A Other protruding magnetic poles 2B Tip surface 4 Stator winding 8 Slot 10 Resolver stator structure 11 Circumferential direction 12 Magnetic pole flange 12a Tip surface 12m Thin wall portion (recess 12C)
12n thick part (convex part 12B)
12B Convex part 12C Concave part 12M One end 12N The other end 13 Inner diameter line 25 Space 26 Arc-shaped concave part (concave part 12C)
30 Step portion L Projection length L ₁ First projection length L ₂ Second projection length G Gap G ₁ Magnetic pole gap P ₁ position

Claims (8)

A circular annular stator (1) having a plurality of protruding magnetic poles (2, 2A) protruding inward at predetermined angular intervals and having a predetermined diameter, and formed at the tip of each protruding magnetic pole (2, 2A) And a magnetic pole hook part (12) along the circumferential direction (11) of the ring-shaped stator (1) and a stator wound around each of the projecting magnetic poles (2, 2A) and positioned inside the magnetic pole hook part (12). In the resolver stator structure in which the rotor (6) is rotatably disposed inside the winding (4) and the annular stator (1),
The first protrusion length (L ₁ ) of at least one of the protrusion magnetic poles (2, 2A) is the second protrusion length (L ₂ ) of the other protrusion magnetic pole ( ₂ ). Or a concave portion (12C) and a convex portion (12B) are formed on the tip surface (12a) of the magnetic pole flange (12) at the tip of the at least one protruding magnetic pole (2). Accordingly, the resolver stator structure is characterized in that the gap (G) between the rotor (6) and the annular stator (1) is partially made larger than the other parts.   The concave portion (12C) and the convex portion (12B) of the tip surface (12a) of the magnetic pole flange portion (12) are bounded by a central position (20) in the circumferential direction (11) of the tip surface (12a) (20A The resolver stator structure according to claim 1, wherein the resolver stator structure is formed as a section.   The positions of the concave portions (12C) and the convex portions (12B) in the protruding magnetic poles (2) adjacent to each other are such that the concave portions (12C) and the convex portions (12B) are directly adjacent to each other. The resolver stator structure according to claim 2.   The concave portion (12C) and the convex portion (12B) formed on the tip surface (12a) of the magnetic pole flange (12) of each protruding magnetic pole (2) are configured to have a plurality of each. The resolver stator structure according to claim 1.   The tip surface (12a) of the magnetic pole flange (12) of the projecting magnetic pole (2) is inclined along the circumferential direction (11) from one end (12M) to the other end (12N). The part (12n) and the thin part (12m) are formed to be continuously inclined, the thick part (12n) forms the convex part (12B), and the thin part (12m) is the concave part (12C). The resolver stator structure according to claim 1, wherein the resolver stator structure is formed.   The positions of the concave portion (12C) and the convex portion (12B) in the protruding magnetic poles (2) adjacent to each other are such that the convex portion (12B) and the concave portion (12C) are directly adjacent to each other, or the convex portion (12B The resolver stator structure according to claim 5, wherein the first and second recesses are directly adjacent to each other, and the recesses are directly adjacent to each other.   The tip end surface (12a) of the magnetic pole flange (12) of the protruding magnetic pole (2) is the same as the first circular locus (1c) indicating the outer diameter (1b) of the annular stator (1) having a predetermined diameter. An arc-shaped recess (26) forming a crescent-shaped space (25) is formed with respect to the second circular locus (1e) having a core and a small diameter, and the ring-shaped stator (1) of the tip surface (12a) One end (12M) and the other end (12N) along the circumferential direction (11) are in contact with the second circular locus (1e) to form a pair of convex portions (12B), and the arc-shaped concave portion (26) is the concave portion. (12C) is formed, The resolver stator structure of Claim 1 characterized by the above-mentioned. The tip surface (12a) of the magnetic pole flange (12) of the projecting magnetic pole (2) is perpendicular to the circumferential direction (11) and along the axial direction (P) of the annular stator (1) ( P ₁ ) forms a step (30), and the protrusion (12B) and the recess (12C) separated by the step (30) and extending along the circumferential direction (11) are formed. The resolver stator structure according to claim 1, wherein the resolver stator structure is provided.

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