JP6946209B2 - Resolver stator structure and resolver - Google Patents

Description

The present invention relates to a stator structure of a resolver and a resolver.

Conventionally, resolvers that detect the rotation angle of rotating electric machines such as motors and generators have been known. Such a resolver includes, for example, a stator core having a plurality of teeth extending from the inner peripheral side of the main body formed in an annular shape toward the center, and a rotor arranged inside the stator core so as to face the plurality of teeth. Be prepared. Further, on the outer peripheral side of the stator core, a mounting ear portion which is provided so as to project outward and has a through hole for inserting a fixing bolt is formed by a resin mold.

Japanese Unexamined Patent Publication No. 2004-7903

However, in the conventional technique, when the position of the through hole is changed according to the device to be fixed, it is necessary to prepare a large number of molds having different positions of the mounting ears, which increases the manufacturing cost of the resolver. There is a fear.

The present invention has been made in view of the above, and an object of the present invention is to provide a stator structure and a resolver of a resolver capable of reducing manufacturing costs.

In order to solve the above-mentioned problems and achieve the object, the stator structure of the resolver according to one aspect of the present invention includes a stator core, an insulator, a coil, and a flange. The stator core has an annular main body and a plurality of teeth extending radially from the inner circumference of the main body and arranged along the circumferential direction of the main body. The insulator covers the plurality of teeth. The coil is wound around the teeth via the insulator. The flange surrounds the outer edge of the stator core in an annular shape, and a plurality of through holes are formed side by side along the circumferential direction of the stator core. The plurality of through holes are each provided with a tubular bush made of a metal material. It is formed of an insulating resin provided. The stator core has an exposed portion where the main body portion is exposed between the insulator and the flange. The insulator includes a terminal block portion extending outward in the radial direction, and the terminal block portion is provided with a plurality of terminals to which the ends of the coils are connected.

According to one aspect of the present invention, the stator structure of the resolver and the manufacturing cost of the resolver can be reduced.

FIG. 1 is a top view showing the configuration of the stator structure of the resolver according to the embodiment. FIG. 2 is a cross-sectional view showing a state in which the resolver according to the embodiment is attached to the rotary electric machine.

Hereinafter, the stator structure and the resolver of the resolver according to the embodiment will be described with reference to the drawings. It should be noted that the embodiments described below do not limit the stator structure of the resolver and the use of the resolver. In addition, it should be noted that the drawings are schematic, and the dimensional relationship of each element, the ratio of each element, and the like may differ from the reality. Further, even between the drawings, there may be parts having different dimensional relationships and ratios from each other.

The structure of the stator structure 1 and the resolver 3 of the resolver 3 according to the embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a top view showing the configuration of the stator structure 1 of the resolver 3 according to the embodiment.

By providing the rotor 2 inside the stator structure 1 of the resolver 3 shown in FIG. 1, the resolver 3 according to the embodiment can be obtained. The resolver 3 according to the embodiment is a VR (Variable Reluctance) type resolver. For example, as shown in FIG. 1, the resolver 3 is an inner rotor type resolver, and the rotor 2 is arranged inside the stator structure 1 of the resolver 3.

FIG. 2 is a cross-sectional view showing a state in which the resolver 3 according to the embodiment is attached to the rotary electric machine 100. The rotor 2 is fixed to the output shaft 101 of the rotary electric machine 100, and rotates with the rotation of the output shaft 101. The rotary electric machine 100 is, for example, an AC motor, an AC generator, an AC motor generator, or the like, and includes an output shaft 101, a rotor 102 fixed to the output shaft 101, and a stator structure 104 having a winding 103. ..

For example, when the rotary electric machine 100 is an AC motor, the winding 103 of the stator structure 104 of the rotary electric machine 100 is an exciting winding, and the exciting current flows through the exciting winding to cause the rotor 102 of the rotary electric machine 100 to move. It rotates, and the output shaft 101 rotates with the rotation of the rotor 102.

Further, the stator structure 1 of the resolver 3 is fixed to the housing 105 of the rotary electric machine 100 by bolts 110. The bolt 110 is made of, for example, an iron material.

Returning to the description of FIG. The outer peripheral surface of the rotor 2 is formed in a non-circular shape uneven in the radial direction. The rotor 2 shown in FIG. 1 has three convex portions 2a on the outer peripheral surface, and shows a case where the axial double angle of the rotor 2 is 3X. The axial double angle of the rotor 2 may be 1X or 2X, or may be 4X or more.

The rotor 2 has a plurality of cores, and the plurality of cores are laminated in the axial direction. The core is manufactured by pressing a plate made of a soft magnetic material such as an electromagnetic steel plate.

The stator structure 1 of the resolver 3 includes a stator core 10, an insulator 20, a winding 30, a flange 40, a terminal block 50, and a lead wire holding portion 60.

The stator core 10 has a laminated structure in which a plurality of steel plates such as electromagnetic steel plates are laminated. The stator core 10 has a main body 11 and a plurality of teeth 12. The main body 11 is annular, and in the embodiment, it is annular. The plurality of teeth 12 extend from the inner peripheral side of the main body portion 11 toward the center of the main body portion 11 (that is, in the radial direction).

In the following, as shown in FIGS. 1 and 2, the radial direction, the axial direction, and the circumferential direction of the stator core 10 will be defined and described. Here, the "radial direction" is a direction orthogonal to the rotation axis of the rotor 2 that rotates inside the stator core 10, and the "axial direction" is a direction that coincides with the axial direction of the rotation axis of the rotor 2. , The "circumferential direction" is a direction that coincides with the rotation direction of the rotor 2.

The insulator 20 is an insulating member, and is formed by, for example, injection molding of an insulating resin. The insulator 20 is formed by, for example, insert molding so that the stator core 10 is embedded therein, and covers the stator core 10 from both sides in the axial direction.

The winding 30 has a conductor and an insulating coating that surrounds the conductor. Such a conducting wire is, for example, a metal wire such as a copper wire, an aluminum wire, or a brass wire. The winding 30 is wound around each of the plurality of teeth 12 via the insulator 20 to form a plurality of coils 31.

The coil 31 is composed of an exciting winding and an output winding. Further, the output winding of the coil 31 is composed of a sin phase output winding that outputs a sin phase output signal and a cos phase output winding that outputs a cos phase output signal.

The flange 40 is an insulating member, and is formed, for example, by injection molding of an insulating resin. The flange 40 is formed by, for example, insert molding so that the edge portion 10a, which is the outer edge of the stator core 10, is embedded therein, and is provided so as to surround the entire edge portion 10a of the stator core 10. That is, the inner edge 40a of the flange 40 is arranged inside the edge 10a of the stator core 10.

The flange 40 is an annular shape having a substantially uniform width in the radial direction. Then, a plurality of through holes 41 formed side by side along the circumferential direction are formed in the flange 40. The through hole 41 has, for example, a plurality of arcuate elongated holes 41a and a plurality of circular holes 41b. Then, the plurality of elongated holes 41a and the plurality of circular holes 41b are arranged alternately side by side along the circumferential direction.

Further, the plurality of through holes 41 are provided with hollow cylindrical bushes 42 having a shape corresponding to the through holes 41. The bush 42 is made of, for example, a metal material. The metal material is preferably a non-magnetic metal, but may be a magnetic metal.

As described above, the annular flange 40 is provided along the edge portion 10a of the stator core 10, and a plurality of through holes 41 are formed in the flange 40, so that the bolt 110 is inserted to be fixed to the housing 105. Such a through hole 41 can be used as an insertion hole. Since the bolt 110 is inserted into the bush 42 made of a metal material and fixed to the housing 105, the rigidity of the mounting portion can be improved. Further, when the bolt 110 is tightened, the stress at the time of tightening the bolt 110 is not directly applied to the stator core 10, so that it is possible to prevent the magnetic characteristics of the stator core 10 from deteriorating. As a result, it is possible to prevent a decrease in the angular accuracy of the resolver 3.

Since a plurality of through holes 41 are formed side by side in the circumferential direction of the flange 40 according to the embodiment, the stator structure 1 of the resolver 3 is attached to various devices with the flange 40 having one shape. be able to. Therefore, according to the embodiment, it is not necessary to prepare a large number of molds for forming the flange 40 according to various devices, so that the manufacturing cost of the stator structure 1 of the resolver 3 can be reduced.

In the embodiment, it is preferable that a plurality of through holes 41 are formed in the flange 40 over the entire area in the circumferential direction. As a result, the resolver 3 can be attached to various devices with the flange 40 having one shape.

Therefore, according to the embodiment, the flange 40 is made of an insulating resin, the edge portion 10a of the stator core 10 is arranged inside the bush 42, and the two are separated from each other by a predetermined distance. Since it is possible to suppress the leakage flux from entering the inner peripheral side of the stator core 10 from the outer peripheral side of the stator core 10 through the bolt 110, it is possible to prevent the leakage flux from entering as a noise component in the coil 31 and to prevent the angle detection accuracy of the resolver 3 from deteriorating. be able to.

Further, in the embodiment, the outer edge 20a of the insulator 20 and the inner edge 40a of the flange 40 are arranged apart from each other, and the main body 11 of the stator core 10 is annularly arranged between the outer edge 20a of the insulator 20 and the inner edge 40a of the flange 40. It should be exposed. In other words, the main body 11 of the stator core 10 may have an annular exposed portion 11a between the outer edge 20a of the insulator 20 and the inner edge 40a of the flange 40.

Thereby, when the insulator 20 and the flange 40 are injection-molded in the mold, the support pin of the mold can be brought into contact with the exposed portion 11a. Therefore, according to the embodiment, when the insulator 20 and the flange 40 are injection-molded, the stator core 10 can be suppressed from moving in the mold, so that the insulator 20 and the flange 40 can be satisfactorily injection-molded. can.

Further, by providing the annular exposed portion 11a in the stator structure 1 of the resolver 3, the heat generated from all the coils 31 arranged side by side in the vicinity of the exposed portion 11a can be efficiently dissipated to the outside. .. Therefore, according to the embodiment, the resolver 3 can be operated stably.

In the embodiment, the insulator 20 and the flange 40 may be formed separately or may be formed integrally. Since the insulator 20 and the flange 40 are formed as separate bodies, the insulator 20 and the flange 40 can be formed into desired shapes, respectively, so that a resolver 3 with higher performance can be realized.

When the insulator 20 and the flange 40 are formed separately, the insulator 20 may be molded first, and then the flange 40 may be molded.

Further, since the insulator 20 and the flange 40 are integrally formed, the injection molding process can be performed at one time, so that the manufacturing cost of the stator structure 1 of the resolver 3 can be reduced.

The description of other parts of the stator structure 1 of the resolver 3 will be continued. The terminal block portion 50 is formed on the insulator 20 and extends radially outward from the insulator 20. A plurality of (six in the embodiment) terminals 51 are supported on the terminal block 50.

The terminal 51 is a conductive member such as metal, and has a entwined portion 51a on one end side that projects axially from the terminal block portion 50 and stands upright. Then, the end of the winding 30 forming the corresponding coil 31 is entwined with the entwined portion 51a.

For example, the winding end of the exciting winding, the winding end of the exciting winding, the winding start of the sin phase output winding, and the winding end of the sin phase output winding are formed on the entwined portion 51a of the six terminals 51. , The winding start of the cos phase output winding and the winding end of the cos phase output winding are entwined, respectively.

Then, the winding 30 and the entwined portion 51a can be electrically connected by, for example, TIG (Tungsten Inert Gas) welding to the entwined portion 51a in which the ends of the windings 30 are entwined. ..

The other end of the terminal 51 is housed in a lead wire holding portion 60 extending radially outward from the terminal block portion 50. As shown in FIG. 1, a plurality of groove-shaped insertion portions 61 are formed in the lead wire holding portion 60, and a lead wire (not shown) extending from an external device (not shown) is inserted into the insertion portion 61. Be held.

Since the other end of the terminal 51 is exposed in the insertion portion 61, the lead wire and the terminal 51 can be electrically connected by inserting the lead wire into the insertion portion 61. can. For example, the lead wire and the terminal 51 can be electrically connected by performing resistance welding on the portion where the lead wire and the terminal 51 come into contact with each other.

As shown in FIG. 1, the winding 30 is guided by the guide portion 52 and extends from the coil 31 toward the entwined portion 51a by a predetermined path. The guide portion 52 is, for example, a pin-shaped guide pin that is erected at a predetermined position on the terminal block portion 50. Further, the guide portion 52 is individually provided for each of the plurality of windings 30 entwined with the plurality of entwined portions 51a.

A slack is formed in the winding 30 between the coil 31 and the entwined portion 51a in order to reduce the influence of thermal expansion due to a temperature change. A slack pin (not shown) is inserted into a plurality of insertion holes 53 formed in the terminal block portion 50, and the winding 30 is hooked on the slack pin and entangled in the entwined portion 51a, and then the insertion hole is formed. It is formed by pulling out a slack pin from 53.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the embodiment, a plurality of elongated holes 41a and a plurality of circular holes 41b are alternately arranged side by side along the circumferential direction as a plurality of through holes 41, but the plurality of through holes 41 are covered. Not limited to cases.

For example, the plurality of through holes 41 may be composed of only a plurality of elongated holes 41a, or may be composed of only a plurality of circular holes 41b. Further, the through hole 41 is not limited to an arc-shaped elongated hole or a circular hole, and may be a square shape or the like.

Further, in the embodiment, the example in which the insulator 20 is integrally formed is shown, but the insulator may be formed by being divided into two in the axial direction, and the stator core 10 may be sandwiched between the two insulators.

Further, in the embodiment, the case where the present invention is applied to the inner rotor type resolver 3 is shown, but the present invention may be applied to the outer rotor type resolver.

As described above, the stator structure 1 of the resolver 3 according to the embodiment includes a stator core 10, an insulator 20, and a flange 40. The stator core 10 has an annular main body portion 11 and a plurality of teeth 12 extending in the radial direction of the main body portion 11 and arranged along the circumferential direction of the main body portion 11. The insulator 20 covers a plurality of teeth 12. The flange 40 surrounds the edge portion 10a of the stator core 10 in an annular shape, and a plurality of through holes 41 are formed side by side along the circumferential direction of the stator core 10, and each of the plurality of through holes 41 is provided with a cylindrical bush 42. .. Since the annular stator core 10 and the flange 40 can be configured as separate members, the stator core 10 can be rotationally laminated regardless of the shape of the flange 40, and the stator core 10 can also be used as a standard shape. .. Thereby, the manufacturing cost of the stator structure 1 can be reduced.

Further, in the stator structure 1 of the resolver 3 according to the embodiment, the bush 42 is made of a metal material. Thereby, the rigidity of the mounting portion can be improved.

Further, in the stator structure 1 of the resolver 3 according to the embodiment, the stator core 10 has an exposed portion 11a that is annularly exposed between the insulator 20 and the flange 40. As a result, the insulator 20 and the flange 40 can be satisfactorily injection-molded.

Further, in the stator structure 1 of the resolver 3 according to the embodiment, the insulator 20 and the flange 40 are separately formed. As a result, the insulator 20 and the flange 40 can be formed into desired shapes, respectively, so that a resolver 3 with higher performance can be realized.

Further, in the stator structure 1 of the resolver 3 according to the embodiment, the insulator 20 and the flange 40 are integrally formed. As a result, the manufacturing cost of the stator structure 1 of the resolver 3 can be reduced.

Further, the resolver 3 according to the embodiment includes a rotor 2 and a stator structure 1 of the resolver 3 described above. As a result, it is possible to realize the resolver 3 in which the manufacturing cost is reduced.

Moreover, the present invention is not limited by the above-described embodiment. The present invention also includes a configuration in which the above-mentioned constituent elements are appropriately combined. Further, further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.

1 stator structure, 2 rotors, 3 resolvers, 10 stator cores, 10a edges, 11 main bodies, 11a exposed parts, 12 teeth, 20 insulators, 30 windings, 31 coils, 40 flanges, 40a inner edges, 41 through holes, 42 bushes. , 50 terminal block, 60 lead wire holder, 100 resolver

Claims (5)

A stator core having an annular main body and a plurality of teeth extending radially from the inner circumference of the main body and arranged along the circumferential direction of the main body.
An insulator that covers the plurality of teeth,
A coil wound around the tooth via the insulator,
Insulation that surrounds the outer edge of the stator core in an annular shape, a plurality of through holes are formed side by side along the circumferential direction of the stator core, and each of the plurality of through holes is provided with a tubular bush made of a metal material. With a flange made of resin,
The stator core has an exposed portion where the main body portion is exposed between the insulator and the flange.
The insulator includes a terminal block portion extending outward in the radial direction, and the terminal block portion is provided with a plurality of terminals to which the ends of the coils are connected.
Resolver stator structure. The stator structure of the resolver according to claim 1, wherein the inner edge of the flange is arranged radially inside the outer edge of the stator core. The stator structure of the resolver according to claim 1 or 2 , wherein the insulator and the flange are separately formed. The stator structure of the resolver according to claim 1 or 2 , wherein the insulator and the flange are integrally formed. With the rotor
The resolver stator structure according to any one of claims 1 to 4.
With a resolver.

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