CN109672275B - Stator structure and rotary transformer - Google Patents
Stator structure and rotary transformer Download PDFInfo
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- CN109672275B CN109672275B CN201811207918.8A CN201811207918A CN109672275B CN 109672275 B CN109672275 B CN 109672275B CN 201811207918 A CN201811207918 A CN 201811207918A CN 109672275 B CN109672275 B CN 109672275B
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- coil
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- coil cover
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- teeth
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K24/00—Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention provides a stator structure and a rotary transformer, which can improve the operation efficiency of injection treatment of a potting agent. The stator structure of the embodiment comprises: a stator core having an annular main body portion and a plurality of teeth extending radially from the main body portion; an insulator covering the plurality of teeth from both sides of the stator core in the axial direction; a plurality of coils wound around each of the plurality of teeth via an insulator; a terminal block portion formed on the insulator and provided with a terminal having a winding portion around which an end of a winding constituting the coil is wound; a first coil cover which covers the coil from one axial side and is provided with a terminal block cover part which covers the terminal block part from one axial side; and a second coil cover covering the coils from the other side in the axial direction, the first coil cover being provided with a first injection port through which a potting agent filled around each of the plurality of coils is injected from one side, and a second injection port through which a potting agent filled around the winding portion is injected from one side.
Description
Technical Field
The invention relates to a stator structure and a resolver.
Background
Conventionally, a resolver that detects a rotation angle of a rotating electrical machine such as a motor or a generator is known. The resolver includes, for example: the stator includes a stator core having a plurality of teeth extending from an inner peripheral side of a main body portion formed in an annular shape toward a center, and a rotor disposed inside the stator core so as to face the plurality of teeth. Further, a plurality of coils are wound around each of the plurality of teeth via an insulator, and a pair of coil covers covering the plurality of coils from both sides in the axial direction are provided to protect the plurality of coils.
Further, a technique of applying a potting agent of resin to the coil and performing a potting treatment to bond the pair of coil covers has been proposed (for example, see patent document 1). In order to protect a terminal around which an end of a winding constituting a coil is wound, a technique of pouring varnish into a container portion housing the terminal and sealing the same has been proposed (for example, see patent document 2).
Patent document 1: japanese patent laid-open publication No. 2003-209946
Patent document 2: japanese patent laid-open publication No. 2013-51749
However, in the conventional technology, when a pair of coil covers are bonded with a potting agent and a terminal is to be sealed with the same potting agent, the direction in which the potting agent is injected around the coil and the direction in which the potting agent is injected around the terminal are different, and therefore, all injection processes cannot be performed in the same step. Therefore, there is a problem that the work efficiency of the potting agent injection treatment is low.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a stator structure and a resolver that can improve the work efficiency of the potting agent injection process.
In order to solve the above problems and achieve the object, a stator structure according to an embodiment of the present invention includes: the stator includes a stator core, an insulator, a plurality of coils, a terminal block, a first coil cover, and a second coil cover. The stator core includes an annular main body portion and a plurality of teeth extending radially from the main body portion. The insulator covers the plurality of teeth from both sides of the stator core in the axial direction. The plurality of coils are wound around each of the plurality of teeth via the insulator. The terminal block portion is formed on the insulator, and is provided with a terminal having a winding portion around which an end of a winding of the coil is wound. The first coil cover covers the coil from one side in the axial direction, and a terminal block cover portion is provided to cover the terminal block portion from the one side in the axial direction. The second coil cover covers the coil from the other side in the axial direction. The first coil cover is provided with a first injection port through which a potting agent filled around each of the plurality of coils is injected from the one side, and a second injection port through which the potting agent filled around the winding portion is injected from the one side.
According to an embodiment of the present invention, the work efficiency of the potting agent injection treatment can be improved.
Drawings
Fig. 1 is a perspective view showing a structure of a stator structure according to an embodiment.
Fig. 2 is a plan view showing the structure of the stator structure of the embodiment.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is a perspective view showing a state before the first coil cover and the second coil cover are assembled in the stator structure of the embodiment.
Description of reference numerals
1 … stator structure, 10 … stator core, 11 … body portion, 12 … teeth, 20 … insulator, 30 … coil, 40 … terminal table portion, 41 … terminal, 41a … winding portion, 50 … first coil cover, 51 … terminal table cover portion, 60 … second coil cover, 70 … container portion, 70a … first inlet port, 80 … container portion, 80a … second inlet port, 90 … potting compound.
Detailed Description
Hereinafter, a stator structure and a resolver according to an embodiment will be described with reference to the drawings. The embodiments described below do not limit the stator structure and the application of the resolver. Note that the drawings are schematic diagrams, and the relationship between the sizes of the elements, the ratio of the elements, and the like may be different from those in reality. Further, the drawings may include portions having different dimensional relationships and ratios from each other.
(details of stator construction)
First, details of the stator structure 1 of the embodiment will be described with reference to fig. 1 to 3. Fig. 1 is a perspective view showing a structure of a stator structure 1 of the embodiment, fig. 2 is a plan view showing the structure of the stator structure 1 of the embodiment, and fig. 3 is a sectional view taken along line a-a of fig. 2.
A resolver according to the embodiment is obtained by providing a rotor, not shown, inside the stator structure 1 shown in fig. 1. The resolver according to the embodiment is a VR (Variable Reluctance) type resolver, and a rotor is fixed to an output shaft of a rotating electrical machine and rotates with rotation of the output shaft. This enables detection of the rotation angle of the output shaft of the rotating electric machine.
As shown in fig. 1, the stator structure 1 includes: stator core 10, insulator 20, a plurality of coils 30, terminal block 40, first coil cover 50, and second coil cover 60.
The stator core 10 has a laminated structure in which a plurality of steel sheets such as electromagnetic steel sheets are laminated. The stator core 10 includes: a body portion 11, and a plurality of teeth 12. The body 11 is annular, and in the embodiment, is annular. The plurality of teeth 12 extend from the inner peripheral side of the main body portion 11 toward the center (i.e., radial direction) of the main body portion 11.
As shown in fig. 1, the radial direction, the axial direction, and the circumferential direction of the stator core 10 will be defined and described later. Here, "radial direction" is a direction orthogonal to the rotation axis of the rotor rotating inside the stator core 10, "axial direction" is a direction matching the axial direction of the rotation axis of the rotor, and "circumferential direction" is a direction matching the rotation direction of the rotor.
The insulator 20 is an insulating member, and is formed by injection molding of an insulating resin, for example. The insulator 20 is formed by, for example, insert molding in which the stator core 10 is embedded, and covers the stator core 10 from both sides in the axial direction.
The plurality of coils 30 are wound around each of the plurality of teeth 12 via the insulator 20. The coil 30 is composed of an excitation winding and an output winding. The output winding of the coil 30 is composed of a sin-phase output winding for outputting a sin-phase output signal and a cos-phase output winding for outputting a cos-phase output signal.
The terminal block 40 is formed on the insulator 20 and extends radially outward from the insulator 20. A plurality of (6 in the embodiment) terminals 41 are supported by the terminal block 40. The terminal 41 is a conductive member such as a metal. The terminal 41 has a winding portion 41a protruding in the axial direction from the terminal block 40 at one end and standing up, and the end of the winding constituting the corresponding coil 30 is wound around the winding portion 41 a.
For example, a winding start end of the field winding, a winding start end of the sin-phase output winding, a winding start end of the cos-phase output winding, and a winding end of the cos-phase output winding are wound around the winding portion 41a of the 6 terminals 41.
The winding portion 41a around which the end of the winding is wound can be electrically connected to the winding portion 41a by, for example, tig (tungsten Inert gas) welding.
The other end of the terminal 41 is accommodated in a lead wire holding portion 42 extending radially outward from the terminal block portion 40. As shown in fig. 4, a plurality of groove-shaped insertion portions are formed in the wire holding portion 42, and a wire 100 extending from an external device (not shown) is inserted into the insertion portions and held therein.
Since the other end of the terminal 41 is exposed at the insertion portion, the lead wire 100 can be electrically connected to the terminal 41 by inserting the lead wire 100 into the insertion portion. For example, the lead wire 100 and the terminal 41 can be electrically connected by resistance welding a portion where the lead wire 100 and the terminal 41 are in contact with each other.
The first coil cover 50 is a cover that covers the coil 30 wound around the teeth 12 from one side (upper side in fig. 1) in the axial direction to protect the coil 30. The first coil cover 50 is formed by injection molding of an insulating resin.
In the first coil cover 50, a terminal block cover portion 51 is formed at a position corresponding to the terminal block portion 40 and the lead wire holding portion 42. A cylindrical wall 51a is formed in the terminal block cover 51 at a position surrounding the plurality of terminals 41.
The second coil cover 60 is a cover that covers the coil 30 wound around the teeth 12 from the other side (lower side in fig. 1) in the axial direction and protects the coil 30. The second coil cover 60 is formed by injection molding of an insulating resin.
Here, in the embodiment, the stator core 10, the insulator 20, the first coil cover 50, and the second coil cover 60 form a plurality of container portions 70 filled with a potting agent 90 (see fig. 3) around each of the plurality of coils 30.
The first coil cover 50 and the second coil cover 60 can be bonded to each other by performing a predetermined heat treatment after filling the potting agent 90 into the container portion 70. Further, by filling the potting agent 90 into the container portion 70 and covering the coil 30 with the potting agent 90, the coil 30 can be protected from oil or the like entering from the outside.
In the embodiment, as shown in fig. 3, a container portion 80 filled with a potting agent 90 is formed around the winding portion 41a of the plurality of terminals 41 by the terminal block portion 40 and the wall portion 51a of the terminal block cover portion 51.
Further, the potting agent 90 is filled in the container portion 80, and the winding portion 41a is covered with the potting agent 90, whereby the winding portion 41a can be protected from oil or the like entering from the outside.
In the embodiment, all of the plurality of first injection ports 70a for injecting the potting agent 90 into the container portion 70 and the second injection ports 80a for injecting the potting agent 90 into the container portion 80 are formed to face one side (upper side in the drawing) in the axial direction.
This enables all the injection processes to be performed from one axial side for all the container portions 70 and 80. That is, in the embodiment, the injection processing can be performed for all of the container portions 70 and 80 in the same operation step by inserting the plurality of nozzles into the first injection port 70a and the second injection port 80a from one side in the axial direction at a time.
Therefore, according to the embodiment, the work efficiency of the injection treatment of the potting agent 90 can be improved. The potting agent 90 is a resin having a predetermined viscosity, and is preferably a flexible material such as polypropylene.
In the embodiment, by forming all the first and second injection ports 70a and 80a to face the axial direction, when the injection treatment is performed from the first and second injection ports 70a and 80a, the stator structure 1 can be set on the work table as it is, and the injection treatment can be performed from the upper side without being fixed to a special work table and performed from a direction in which the operation is difficult.
Therefore, according to the embodiment, the first injection port 70a and the second injection port 80a are all formed to face the axial direction, so that the workability at the time of the injection treatment of the potting agent 90 into the stator structure 1 can be improved.
In the embodiment, as shown in fig. 2, the first inlet 70a may be formed in all of the container portions 70 formed around each of the plurality of teeth 12.
Here, it is assumed that the first inlet 70a is not formed in all of the container portions 70, and the plurality of container portions 70 share one first inlet 70a, and the corresponding container portions 70 are connected to each other inside. In this case, when the injection processing is performed from the common first injection port 70a to the plurality of container portions 70 connected inside, the injection state of the potting agent 90 is not substantially uniform in each container portion 70, and therefore, there is a possibility that the reliability and the like of the coil 30 are adversely affected.
On the other hand, in the embodiment, since the first injection ports 70a are formed in all the container portions 70, the injection state of the potting agent 90 can be substantially equalized in each container portion 70. Therefore, according to the embodiment, the reliability of the stator structure 1 can be improved.
(assembling Process of stator Structure)
Next, an assembly process of the stator structure 1 according to the embodiment will be described with reference to fig. 4. Fig. 4 is a perspective view showing a state before the first coil cover 50 and the second coil cover 60 are assembled in the stator structure 1 according to the embodiment.
As shown in fig. 3, the coil 30 is wound around each of the plurality of teeth 12 via the insulator 20 formed by insert molding in which the stator core 10 is embedded. Further, a gap 13 is formed between adjacent teeth 12.
Then, the first coil cover 50 and the second coil cover 60 are assembled to the structure from both sides in the axial direction.
The first coil cover 50 has: an annular outer annular portion 50a, and an annular inner annular portion 50b provided inside the outer annular portion 50 a. Further, in the first coil cover 50, a plurality of first injection ports 70a are formed at equal intervals in the circumferential direction between the outer annular portion 50a and the inner annular portion 50b, and a plurality of support portions 50c extending downward are provided at equal intervals in the circumferential direction at portions where the first injection ports 70a are not formed between the outer annular portion 50a and the inner annular portion 50 b.
A projection 50cb that fits into a tip 60ba of a post 60b described later is formed at a tip 50ca of the post 50 c.
The second coil cover 60 has an annular main body portion 60 a. Further, a plurality of pillar portions 60b extending upward from the inside of the main body portion 60a are provided at equal intervals in the circumferential direction on the second coil cover 60. A recess 60bb into which a protrusion 50cb formed at the distal end 50ca of the pillar portion 50c is fitted is formed at the distal end 60ba of the pillar portion 60 b.
In the assembly step of the stator structure 1, the structure is sandwiched between the first coil cover 50 and the second coil cover 60 from above and below. At this time, the leg portions 50c of the first coil cover 50 are inserted into the gaps 13 formed in the stator core 10, and the leg portions 60b of the second coil cover 60 are similarly inserted into the gaps 13.
Here, the convex portion 50cb of the tip 50ca of the pillar portion 50c is fitted into the concave portion 60bb of the tip 60ba of the pillar portion 60b to close the tip portions of the adjacent teeth 12, and the first coil cover 50 and the second coil cover 60 surround the coil 30, thereby forming the container portion 70 described above around the coil 30. The variation in the lamination dimension of the stator core 10 having the laminated structure can be adjusted by fitting the convex portion 50cb into the concave portion 60 bb. It is to be noted that the convex portion 50cb and the concave portion 60bb may be of opposite configurations.
The container portion 70 is formed of the stator core 10 and the insulator 20 in addition to the first coil cover 50 and the second coil cover 60, and is formed so that a gap through which the potting agent 90 leaks is not formed except for the first injection port 70 a.
This can prevent the potting agent 90 from leaking from the container portion 70 when the potting agent 90 is injected into the container portion 70.
While 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 thereof. For example, in the embodiment, the insulator 20 is integrally formed, but the insulator 20 may be formed by being divided into two in the axial direction, and the stator core 10 may be sandwiched by the two insulators.
In the embodiments, the present invention is applied to an inner rotor type resolver, but the present invention may be applied to an outer rotor type resolver.
As described above, the stator structure 1 of the embodiment includes: stator core 10, insulator 20, a plurality of coils 30, terminal block 40, first coil cover 50, and second coil cover 60. The stator core 10 includes an annular main body 11 and a plurality of teeth 12 extending radially from the main body 11. The insulator 20 covers the plurality of teeth 12 from both sides in the axial direction of the stator core 10. The plurality of coils 30 are wound around each of the plurality of teeth 12 via the insulator 20. The terminal block 40 is formed on the insulator 20, and is provided with a terminal 41 having a winding portion 41a around which the end of the winding constituting the coil 30 is wound. The first coil cover 50 covers the coil 30 from one axial side, and is provided with a terminal block cover portion 51 that covers the terminal block portion 40 from one axial side. The second coil cover 60 covers the coil 30 from the other side in the axial direction. The first coil cover 50 is provided with a first injection port 70a through which the potting agent 90 filled around each of the plurality of coils 30 is injected from one side, and a second injection port 80a through which the potting agent 90 filled around the winding portion 41a is injected from one side. This can improve the work efficiency of the injection treatment of the potting agent 90.
In the stator structure 1 according to the embodiment, each of the first coil cover 50 and the second coil cover 60 has the plurality of leg portions 50c and 60b that are arranged in the gap 13 formed between the adjacent teeth 12 and that close the space between the distal end portions of the adjacent teeth 12, and the distal end 50ca of each leg portion 50c of the first coil cover 50 is fitted to the distal end 60ba of each leg portion 60b of the second coil cover 60. This can prevent the potting agent 90 from leaking from the container portion 70 when the potting agent 90 is injected into the container portion 70.
In the stator structure 1 of the embodiment, the first injection port 70a is formed around all the coils 30. This can improve the reliability of the stator structure 1.
The resolver according to the embodiment includes a rotor and the stator structure 1. This can realize a resolver that improves the work efficiency of the injection treatment of the potting agent 90.
The present invention is not limited to the above embodiments. The present invention also includes an invention in which the above-described constitutional elements are appropriately combined. Further effects and modifications can be easily derived by those skilled in the art. Therefore, the embodiment of the present invention in its broader aspects is not limited to the above-described embodiment, and various modifications can be made.
Claims (4)
1. A stator structure is provided with:
a stator core having an annular main body portion and a plurality of teeth extending radially from the main body portion;
an insulator covering the plurality of teeth from both sides in an axial direction of the stator core;
a plurality of coils wound around the plurality of teeth via the insulator;
a terminal block portion formed on the insulator and provided with a terminal having a winding portion around which an end of a winding of the coil is wound;
a first coil cover that covers the coil from one side in the axial direction and has a terminal block cover portion that covers the terminal block portion from the one side in the axial direction; and
a second coil cover covering the coil from the other side in the axial direction,
the first coil cover is provided with a first injection port through which a potting agent filled around each of the plurality of coils is injected from the one side, and the terminal block cover is provided with a second injection port through which the potting agent filled around the winding portion is injected from the one side.
2. The stator construction of claim 1 wherein,
the first coil cover and the second coil cover each have a plurality of pillar portions arranged in a gap formed between the adjacent teeth and blocking a gap between tip portions of the adjacent teeth,
the front end of each of the leg portions of the first coil cover is fitted to the front end of each of the leg portions of the second coil cover.
3. The stator configuration according to claim 1 or 2,
the first injection port is formed around all of the coils.
4. A rotary transformer is provided with:
a rotor;
a stator construction according to any one of claims 1 to 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017200866A JP6847805B2 (en) | 2017-10-17 | 2017-10-17 | Stator structure and resolver |
| JP2017-200866 | 2017-10-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109672275A CN109672275A (en) | 2019-04-23 |
| CN109672275B true CN109672275B (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811207918.8A Active CN109672275B (en) | 2017-10-17 | 2018-10-17 | Stator structure and rotary transformer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6847805B2 (en) |
| CN (1) | CN109672275B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112786297A (en) * | 2021-03-15 | 2021-05-11 | 株洲维通利电气有限公司 | Rotary transformer suitable for oil-cooled motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282066A (en) * | 2007-04-05 | 2008-10-08 | 三菱电机株式会社 | Dynamoelectric coil portion insulating construction |
| CN203423542U (en) * | 2013-07-30 | 2014-02-05 | 中山大洋电机制造有限公司 | Plastic packaging stator structure and plastic packaging motor applying same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5910538Y2 (en) * | 1978-05-31 | 1984-04-03 | 三菱重工業株式会社 | Rotary injector in thermal separator |
| JPS5692454U (en) * | 1979-12-17 | 1981-07-23 | ||
| JPH0522908A (en) * | 1991-07-08 | 1993-01-29 | Kokusan Denki Co Ltd | Stator for rotary electric machine, and its manufacture |
| JP3556530B2 (en) * | 1999-07-05 | 2004-08-18 | 本田技研工業株式会社 | Hybrid vehicle drive |
| JP3406289B2 (en) * | 2000-09-28 | 2003-05-12 | 多摩川精機株式会社 | Rotation detector structure |
| US20120262015A1 (en) * | 2009-10-14 | 2012-10-18 | Daesung Electric Co., Ltd. | Resolver of electric driving motor for vehicle |
| JP5942585B2 (en) * | 2012-05-16 | 2016-06-29 | コベルコ建機株式会社 | Electric motor and manufacturing method thereof |
| JP5943881B2 (en) * | 2013-07-04 | 2016-07-05 | 日本航空電子工業株式会社 | Resolver cable connection structure, manufacturing method thereof, and resolver |
| JP6208717B2 (en) * | 2015-06-24 | 2017-10-04 | ミネベアミツミ株式会社 | Resolver |
| JP6526733B2 (en) * | 2016-04-05 | 2019-06-05 | ミネベアミツミ株式会社 | Stator structure and resolver |
-
2017
- 2017-10-17 JP JP2017200866A patent/JP6847805B2/en active Active
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2018
- 2018-10-17 CN CN201811207918.8A patent/CN109672275B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282066A (en) * | 2007-04-05 | 2008-10-08 | 三菱电机株式会社 | Dynamoelectric coil portion insulating construction |
| CN203423542U (en) * | 2013-07-30 | 2014-02-05 | 中山大洋电机制造有限公司 | Plastic packaging stator structure and plastic packaging motor applying same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6847805B2 (en) | 2021-03-24 |
| CN109672275A (en) | 2019-04-23 |
| JP2019075902A (en) | 2019-05-16 |
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