CN110875642A - Stator structure of motor and motor - Google Patents
Stator structure of motor and motor Download PDFInfo
- Publication number
- CN110875642A CN110875642A CN201910833606.6A CN201910833606A CN110875642A CN 110875642 A CN110875642 A CN 110875642A CN 201910833606 A CN201910833606 A CN 201910833606A CN 110875642 A CN110875642 A CN 110875642A
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- stator
- stator core
- electric machine
- stator structure
- holding body
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- 238000003466 welding Methods 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 abstract description 20
- 239000000463 material Substances 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 238000010030 laminating Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- 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
- H02K1/16—Stator cores with slots for windings
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a stator structure of a motor and the motor, wherein the stator structure can be easily assembled even if the stator is laminated with sheets, and a winding space is ensured. The stator structure of the motor includes: a stator core (2) having a plurality of sheets stacked in an axial direction; a holder (3) for holding the stator core (2); a cover body (4) covering the holding body (3), wherein the stator core (2) comprises an annular part (21) and a plurality of protruding parts (22) extending towards the inner side of the annular part (21), the holding body (3) is provided with 2 walls opposite to the outer surfaces of the protruding parts (22) in the circumferential direction and a bottom part (33a) contacting with the stator core (2) in the axial direction, the cover body (4) is provided with a protruding part (42) overlapping with the protruding parts (22) of the stator core (2) and an annular part (41) overlapping with the annular part (21) of the stator core (2) in the axial direction, and the 2 walls and the protruding parts are arranged side by side in the circumferential direction.
Description
Technical Field
The invention relates to a stator structure of a motor and the motor.
Background
Soft magnetic materials such as silicon steel plates, which are easily changed in magnetization, are used as stator materials of motors. Since this material exhibits conductivity and may generate an eddy current, the material is generally used by laminating sheets (sheets) having a thickness of about 0.5 to 0.1mm to suppress the eddy current. However, in a high-speed motor or the like driven in a high frequency range, even if the motor or the like is used in a stacked manner as described above, efficiency reduction due to eddy current is not negligible. In recent years, there has been a growing demand for higher efficiency of motors, and stator materials with low loss have been demanded.
As a solution, a stator formed by laminating sheets of, for example, an ultra-thin belt having a thickness of about 25 μm is proposed. By reducing the thickness of each 1 sheet, the eddy current becomes small, and suppression of loss is expected. However, since this sheet is thin and lacks rigidity, and the laminate cannot be bonded by pressure bonding or the like, it is relatively difficult to maintain the sheet as a laminate. In the case of bonding using an adhesive, since the number of laminated sheets is large, the amount of the adhesive entering between the layers is also large, and the space factor of the soft magnetic material is lowered.
It is considered to use a pair of upper and lower separators (insulators), and after laminating sheets in one of the separators, the other separator is engaged and the side surfaces are welded to maintain the laminated state. When the structure in which the pair of upper and lower separators are engaged with each other is adopted as described above, the engaged and welded portions occupy a space due to the overlapping of the separators, and the winding space is reduced. This may cause problems such as difficulty in grooving, inability to increase the number of windings, and unsmooth winding operation.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2009-240135
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in view of the above circumstances, and an object thereof is to provide a stator structure of a motor, which can easily perform an assembly operation and can secure a winding space even in a stator formed by laminating sheets, for example, and a motor using the stator structure.
Means for solving the problems
The above problems are solved by the following invention. That is, the stator structure of the motor of the present invention includes: the stator core includes a ring-shaped portion and a plurality of protruding portions extending to the inside of the ring-shaped portion, the holding body includes 2 walls facing the outer surfaces of the protruding portions in the circumferential direction and a bottom portion contacting the stator core in the axial direction, the cover body includes a protruding portion overlapping the protruding portions of the stator core in the axial direction and a ring-shaped portion overlapping the ring-shaped portion of the stator core in the axial direction, and the 2 walls and the protruding portion are arranged side by side in the circumferential direction.
In the present invention, the holding body preferably has an outer wall portion surrounding an outer peripheral portion of the annular portion of the stator core.
In this case, the outer peripheral portion of the annular portion of the lid body and the entire or a part of the outer wall portion are preferably fixed by adhesion or welding.
In the present invention, the holding body preferably has a wall facing an end of the protruding portion in a radial direction.
In this case, it is preferable that an end of the protruding portion and all or a part of a wall of the holding body facing the end of the protruding portion are fixed by adhesion or welding in the radial direction.
The thickness of each of the plurality of sheets is preferably smaller than the thickness of the cover, and is preferably 25 μm or less. Further, each of the plurality of sheets is preferably a flat plate.
The fixing region where the lid body and the holding body are fixed by adhesion or welding is preferably an end portion of the protruding portion in the radial direction and an inner surface of the wall of the holding body opposed to the end portion of the protruding portion.
In this case, the non-fixing portion where the lid body and the holding body are not fixed by adhesion or welding is preferably an outer edge of the protruding portion in the circumferential direction and an inner surface of the 2 walls facing the outer edge of the protruding portion.
On the other hand, the motor of the present invention includes the stator structure of the motor of the present invention, a shaft, a rotor fixed to the shaft, a coil wound around the stator core, and a housing.
Drawings
Fig. 1 is an exploded perspective view of a stator according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a stator according to an embodiment of the present invention, the cross-sectional view being cut along a plane including an axis.
Fig. 3 is a plan view of a sheet used in a stator according to an embodiment of the present invention.
Fig. 4 is a perspective view of a housing used for a stator according to an embodiment of the present invention.
Fig. 5 is a perspective view of a cover used for a stator according to an embodiment of the present invention.
Fig. 6 is a perspective view of a motor using a stator according to an embodiment of the present invention.
Fig. 7 is a cross-sectional view of the motor of fig. 6, taken in a plane containing the shaft.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Fig. 1 is an exploded perspective view of a stator 1 according to an embodiment of the present invention, and fig. 2 is a cross-sectional view of the stator 1 cut along a plane including a central axis X.
The stator 1 includes a stator core 2, a housing (holding body) 3 for holding the stator core 2, and a cover 4 for covering the housing (holding body) 3. As shown in fig. 1 and 2, the members each have an annular portion and are positioned coaxially (on the central axis X). The storage body 3 and the lid 4 are combined to form a so-called "spacer".
In the following description, for convenience, the upper side (the lid 4 side) and the lower side (the container 3 side) in fig. 1 and 2 are referred to as the upper side or the upper side and the lower side, respectively, and these do not naturally represent the vertical relationship in the gravity direction.
The stator core 2 is configured by stacking a plurality of (400 in the present embodiment) ultra-thin (25 μm thick) sheets 5.
Fig. 3 shows a plan view of the sheet 5. As shown in fig. 3, the sheet 5 includes a circular portion (hereinafter referred to as "sheet circular portion") 51 and 6 protruding pieces 52 extending from the sheet circular portion 51 toward the center axis X. The protruding pieces 52 are arranged at equally spaced positions in circular symmetry (1/6-th order of symmetry). The stator core 2 having an overall thickness of 1cm is formed by stacking 400 sheets 5 on the housing 3 and housing them, and pressing them with the lid 4 to form a lid. That is, the stator core 2 is formed by laminating the sheets 5, the sheet circular ring portion 51 is the annular portion 21 of the stator core 2, and the protruding pieces 52 are the teeth 22 which are the protruding portions forming the magnetic pole portions of the stator core 2.
6 notches 6 are formed at equal intervals on the outer periphery of the stator 1. The notches 6 are provided in the same number as the teeth 22 so that the inner peripheral side thereof corresponds to the position of the end of the teeth 22 via the annular portion 21. This cut-out 6 is used when assembling the motor. Corresponding to the notches 6, notches are also formed at the same positions in the stator core 2, the housing 3, the cover 4, and the sheet 5, respectively, and descriptions thereof will be omitted in the following description unless otherwise particularly required.
As a material of the sheet 5, a magnetic material generally used as a component of a stator can be used as it is, and an electromagnetic steel plate such as a silicon steel plate excellent in electromagnetic characteristics, an amorphous alloy, a nanocrystalline alloy, or the like is preferably used.
The thickness of the sheet 5 is preferably such a thickness that eddy current is not substantially generated, and is preferably smaller than the thickness of the cover 4, specifically preferably 100 μm or less, more preferably 25 μm or less. Considering both the workability and the electromagnetic properties, the thickness is most preferably 25 μm in the present embodiment.
The plurality of sheets 5 are flat plates, and the surfaces of the plurality of sheets 5 facing each other in the stacking direction of the plurality of sheets 5 are flat surfaces.
The housing 3 and the lid 4 may be used without any problem as long as they are members having insulating properties, and it is preferable to use a known resin material (including any of block, plate, and film) which is generally used as a separator as it is.
Fig. 4 is a perspective view of the housing 3 as viewed from above, and fig. 5 is a perspective view of the cover 4 as viewed from below.
The housing 3 includes: a ring-shaped bottom portion 33 having a planar shape substantially the same as that of the sheet 5; an outer wall portion 34 that substantially surrounds the outer peripheral portion of the annular portion 21 of the stator core 2, and an inner wall portion 35 that surrounds the inner peripheral portion (an annular inner wall portion 35b described later) of the annular portion 21 and the teeth 22 forming the inner surface of the stator core 2 along the outer surface thereof. The groove formed on 3 surfaces of the protruding bottom portion 33b of the bottom portion 33 contacting the tooth 22 and the 2 walls 35c of the inner wall portion 35 facing each other so as to surround the tooth 22 of the stator core 2 is hereinafter referred to as a "groove portion 32".
Of the bottom portion 33, the outer wall portion 34, and the inner wall portion 35, the annular groove other than the groove portion 32 surrounded by the annular inner wall portion 35b is referred to as an "annular groove portion 31", and the portion of the bottom portion 33 is particularly referred to as an "annular bottom portion 33 a". Further, of the inner wall portion 35, a wall located at the tip end (end) of the groove portion 32 and facing the tip end (end corresponding to the end 52a of the protruding piece 52) of the tooth 22 is referred to as a "tip end wall 35 a". Further, the front end wall 35a is opposed to the end 52a of the tab 52 in the radial direction. The end 52a of the tab 52 forms the leading end (end) of the tooth 22 of the stator core 2.
The annular groove portion 31 (annular bottom portion 33a) has a smaller inner diameter and a larger outer diameter than the sheet annular portion 51 of the sheet 5, and the groove portion 32 has a larger width (in the circumferential direction) and a longer length (in the radial direction) than the protruding piece 52 of the sheet 5. That is, the size of the portion of the housing 5 formed by the annular groove 31 and the groove 32 of the housing 3 is one turn larger than the sheet 5. The gap between the housing 3 and the sheet 5 depends on the overall size, but is preferably designed to be 200 μm or less.
On the other hand, the lid 4 is formed of 1 plate-like member, and includes an annular ring portion 41 and a plurality of projecting portions 42 located inside the inner wall portion 35 of the housing 3. The number of the extension portions 42 is 6, and extends from the annular portion 41 toward the center axis X. The protruding portion 42 is arranged side by side with the 2 walls 35c of the housing 3 in the circumferential direction. The annular portion 41 is laminated on the annular portion 21 of the stator core 2. The annular plate portion 41 has a larger inner diameter and a smaller outer diameter than the annular groove portion 31 of the housing 3, and the protruding portion 42 has a smaller width and a shorter length than (the opening of) the groove portion 32 of the housing 3. That is, the opening (hereinafter referred to as "upper opening") formed by the annular groove portion 31 and the groove portion 32 of the housing 3 is larger than the lid 4 by one turn.
The outer peripheral portion of the annular plate portion 41 of the lid 4 and the entire or a part of the outer wall portion 34 of the housing 3 are fixed by bonding or welding. Specifically, the end portion (the distal end portion 42a) of the extension portion 42 and the entire or a part of the distal end wall 35a of the inner wall portion 35 are fixed by adhesion or welding in the radial direction. As described later, a gap is preferably provided between the upper opening of the housing 3 and the lid 4 so as to enable bonding or welding, and therefore the gap between the two is preferably set to 200 μm or less.
Next, the procedure for manufacturing the stator 1 will be described.
A predetermined number of sheets 5 are stacked in order such that the sheet circular portions 51 of the sheets 5 are located in the annular groove portions 31 and the protruding pieces 52 are located in the groove portions 32, and are arranged in the housing 3. In this case, a protrusion of a jig, not shown, is inserted into the notch 6 provided in the outer peripheral portion of the housing 3 to perform positioning, so that the sheet can be easily arranged in the housing 3. Further, the area of the housing 3 for housing the sheet 5 is larger than the outer shape of the sheet 5, i.e., so-called clearance fit, and therefore the sheet 5 is less likely to be damaged.
After all the sheets 5 are stored in the storage body 3, the storage body 3 is covered with the lid 4 while being pressed against the stacked body of the sheets 5 so that the annular portion 41 of the lid 4 is positioned at the opening of the annular groove portion 31 and the protruding portion 42 is positioned at the opening of the groove portion 32. In this case, the cover 4 can be easily positioned in the housing 2 by inserting a protrusion of a jig, not shown, into a notch provided in the outer periphery of the cover 4.
The opening of the upper portion (one end side in the stacking direction of the sheets 5) of the housing 3 is larger than the outer shape of the lid 4, that is, so-called clearance fit. A predetermined load is applied to the lid 4, and a predetermined portion is bonded and fixed by an adhesive. The cover 4 is not limited to the clearance fit, and may be fixed by press-fitting the housing 3.
The site to be bonded is preferably at the following 3 points: (1) the front end wall 35a of the housing 3 and the front end portion 42a of the extension portion 42 of the lid 4, (2) the outer wall portion 34 of the housing 3 and the outer periphery 41a (of the annular portion 41) of the lid 4, (3) the inner surface forming the annular inner wall portion 35b of the annular groove portion 31 of the housing 3 and the inner periphery portion 41b forming the annular portion 41 of the lid 4. If these 3 points are fixed, the strength is sufficient. The contact surface with the motor case (described later using fig. 7), the groove 32 and the protruding portion 42 which become the winding area may be the non-fixed area. This is because: when these portions are used as bonding regions, there is a possibility that dimensional accuracy is affected by the bonding operation or winding space is reduced.
Thus, the fixing region where the sheet 5 and the housing 3 are fixed by adhesion or welding may be the end 42a of the protruding portion 42 and the front end wall 35a of the holding body 3 facing the end 42a of the protruding portion 42 in the radial direction, and the non-fixing region where the sheet 5 and the housing 3 are not fixed by adhesion or welding may be the outer edge 42c of the protruding portion 42 and the 2 walls 35c facing the outer edge 42c of the protruding portion 42 in the circumferential direction.
The adhesive to be used is not particularly limited, and any adhesive suitable for bonding the materials of the housing 3 and the lid 4 may be used. The fixation of both is not limited to the method using an adhesive, and for example, a welding method in which resin materials of both are melted and integrated by heat and then cooled and fixed may be used.
The bonded region is planar and terminates at the surface, and is therefore suitably bonded by UV irradiation using an Ultraviolet (UV) curable adhesive. Therefore, according to the stator structure of the motor of the present embodiment, improvement in productivity can be expected. In addition, when fixation is performed by another bonding method or welding method, since the surface is flat and ends at the surface, work such as an adhesive application operation or a heating operation of a target portion is easily performed, and workability is excellent.
The stator 1 of the present embodiment is manufactured as described above.
In the stator 1 of the present embodiment, the width of the protruding portion 42 located at the opening of the groove portion 32 is narrower than the opening of the groove portion 32, and therefore, the groove portion 32 and the protruding portion 42 are in a spaced state or a line contact state. When the two are not perfectly parallel to each other (including dimensional tolerance, misalignment, and inclination), a point contact state may be achieved.
The contact portion between the groove portion 32 and the extension portion 42 is elongated, and naturally, even if it has a width corresponding to the thickness of these members, it is included in the category of "line contact state". Similarly, if the width of the contact portion between the two members has a minute area and the maximum length thereof is about the thickness of these members, the range of the "point contact state" is naturally included.
As described above, in the housing 3 and the lid 4 constituting the so-called spacer, the groove portion 32 and the protruding portion 42 are spaced apart from each other or are in line contact or point contact, and therefore, unlike the case where both are overlapped and a fixing mechanism such as pressure bonding is provided, the outer shape of the square cylindrical portion constituted by the groove portion 32 and the protruding portion 42 surrounding the tooth 22 can be kept small.
The square tubular portion composed of the groove portion 32 and the protruding portion 42 is a portion where the winding is wound to form a coil, and the periphery of the square tubular portion becomes a winding space. That is, according to the present embodiment, the winding space does not protrude excessively, and a wide winding space can be secured. Therefore, it is possible to realize a multi-grooved structure, increase the number of winding operations, and facilitate the winding operation.
Further, according to the present embodiment, since the housing 3 has the outer wall portion 34 surrounding the outer periphery of the annular portion 21 of the stator core 2, the stator 1 can be pinched from the outer peripheral surface during the winding operation or the subsequent assembly operation to the motor, and the operation efficiency of these operations can be improved. Further, since the stator core 2 is covered with the outer wall portion 34, the outer peripheral surface of the stator core 2 can be protected from damage, dirt, and the like.
Next, a configuration example in which the stator 1 of the present embodiment is assembled to a motor will be described.
The stator 1 may be incorporated into a brushless DC motor or a stepping motor for use.
Fig. 6 is a perspective view of the motor 10 incorporating the stator 1, and fig. 7 is a cross-sectional view taken along a plane including the shaft (shaft 81) thereof. The motor 10 is a brushless DC motor.
The motor 10 is fixed in the housing 7 in a state where the outer periphery of the stator 1 contacts the inner wall of the housing 7, and the rotor 8 is disposed in the stator 1 in a coaxially penetrating state. The rotor 8 is composed of a shaft 81 and permanent magnets 82 disposed and fixed around the shaft, and is attached to the vertically opposed wall surfaces of the housing 7 via bearings 9. Thus, the rotor 8 is rotatably fixed to the housing 7.
The permanent magnet 82 provided in the rotor 8 faces the 6 teeth 22 via the front end wall 35a of the housing 3 of the stator 1.
In fig. 7, the winding is wound in the winding region (the groove portion 32 and the protruding portion 42) of the stator 1 to form the coil 11, and wiring (not shown) is led out to the outside of the case 7.
By applying a controlled signal voltage to each coil by a control device not shown, repulsion and attraction between the permanent magnet 82 and the electromagnet of the coil are appropriately generated, and the rotor 8 generates a rotational driving force. As described above, the shaft 81 rotates, and the rotational force thereof is appropriately transmitted to the outside.
The stator structure of the motor of the present invention and the motor using the same (hereinafter, simply referred to as "the stator structure and the motor of the present invention") have been described above with reference to preferred embodiments, but the stator structure and the motor of the present invention are not limited to the configurations of the above embodiments. For example, in the above embodiment, the number of teeth 22 of the stator core 2 is 6, but the number of teeth 22 is not limited to this. And the number of the cells can be less than 6, and can also be more than 6. However, the stator structure according to the present invention is suitable for a plurality of slots because the winding space is easily secured. Therefore, the present invention is excellent in that the number of teeth can be made larger.
In the above embodiment, the case where the housing 3 that accommodates the stator core 2 properly is used is described, but in the present invention, the holding body corresponding to a part of the spacer may have at least a groove portion and an annular bottom portion, may be fixed to the lid body, and may hold the stator core, and any or all of the front end wall 35a, the outer wall portion 34, and the annular inner wall portion 35b may be omitted. When all of them are omitted, the holding body and the lid body may be fixed by bonding or welding the groove portion 32 and the protruding portion 42.
Of course, as described above, the groove portion 32 and the protruding portion 42 are preferably not bonded or welded, and therefore, it is preferable to have any one of the front end wall 35a, the outer wall 34, and the annular inner wall portion 35 b. By having any of these members, the sheet can be firmly held. In particular, by providing the outer wall 34 as described above, the winding operation can be facilitated, and the outer periphery of the stator 2 can be protected.
Further, by providing the front end wall 35a, the front end portion of the tooth 22 can be protected during the winding operation or the motor assembling operation to the rear thereof.
In addition, in the present embodiment, a stator core in which sheets of ultra-thin strips having a thickness of about 25 μm are laminated is exemplified, but the present invention can also be applied to a stator core in which sheets having a normal thickness of about 0.5 to 0.1mm or other thicknesses are laminated. In this case, the assembly work is also easy, and the winding space can be secured.
In addition, the rotating apparatus of the present invention can be appropriately modified by those skilled in the art based on the past knowledge. It is needless to say that the present invention includes the above-described modifications, and the present invention is included in the scope thereof.
Description of the reference numerals
1, a stator; 11 a coil; 2a stator core; 21 an annular portion; 22 teeth; 3a container (holding body); 31 an annular groove portion; 32 groove parts; 33a bottom part; 33a an annular bottom; 33b protruding from the bottom; 34 outer wall; 35 an inner wall portion; 35a front end wall; 35b an annular inner wall portion; 35c2 wall; 4, a cover body; 41a circular ring part; 41a periphery; 41b inner peripheral portion; 42 an extension portion; 42a front end portion (end portion); 42c outer edge; 5, sheets; 51 circular ring part of sheet material; 52a tab; 52a end portion; 6, cutting; 7, a shell; 8, a rotor; an 81-axis; 82 a permanent magnet; 9 bearing; 10 motor.
Claims (11)
1. A stator structure of an electric machine, comprising:
a stator core having a plurality of sheets stacked in an axial direction;
a holding body for holding the stator core;
a cover body which covers the holding body,
the stator core includes an annular portion and a plurality of protruding portions extending to an inner side of the annular portion,
the holding body includes 2 walls opposed to the outer surface of the protrusion in the circumferential direction, and includes a bottom portion in contact with the stator core in the axial direction,
the cover includes a protruding portion overlapping the protruding portion of the stator core in the axial direction, an annular portion overlapping the annular portion of the stator core,
the 2 walls are arranged side by side with the protrusion in the circumferential direction.
2. The stator structure of an electric machine according to claim 1, wherein the holder has an outer wall portion that surrounds an outer peripheral portion of the annular portion of the stator core.
3. The stator structure of an electric motor according to claim 2, wherein the outer peripheral portion of the annular portion of the cover and all or a part of the outer wall portion are fixed by bonding or welding.
4. The stator structure of an electric machine according to any one of claims 1 to 3, wherein the holding body has a wall opposed to an end of the protruding portion in a radial direction.
5. The stator structure of an electric machine according to claim 4, wherein all or a part of an end portion of the protruding portion, a wall of the holding body opposed to the end portion of the protruding portion, and the like are fixed by bonding or welding in a radial direction.
6. The stator structure of an electric machine according to any one of claims 1 to 5, wherein each of the plurality of sheets has a thickness smaller than a thickness of the cover.
7. The stator structure of an electric machine according to any one of claims 1 to 6, wherein each of the plurality of sheets has a thickness of 25 μm or less.
8. The stator structure of an electric machine according to any one of claims 1 to 7, wherein the plurality of sheets are each a flat plate.
9. The stator structure of an electric machine according to any one of claims 1 to 8, wherein a region where the cover body and the holding body are fixed by adhesion or welding is an end portion of the protruding portion and an inner surface of a wall of the holding body opposed to the end portion of the protruding portion in a radial direction.
10. The stator structure of an electric machine according to claim 9, wherein a non-fixed portion where the cover body and the holding body are not fixed by adhesion or welding is an outer edge of the protruding portion and an inner surface of the 2 walls opposite to the outer edge of the protruding portion in a circumferential direction.
11. An electric machine, comprising:
a stator structure of an electric machine according to any one of claims 1 to 10;
a shaft;
a rotor fixed to the shaft;
a coil wound around the stator core;
a housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018165425A JP2020039218A (en) | 2018-09-04 | 2018-09-04 | Stator structure for motor and the motor |
| JP2018-165425 | 2018-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110875642A true CN110875642A (en) | 2020-03-10 |
Family
ID=69717811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910833606.6A Pending CN110875642A (en) | 2018-09-04 | 2019-09-04 | Stator structure of motor and motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020039218A (en) |
| CN (1) | CN110875642A (en) |
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| JP2002354737A (en) * | 2001-05-30 | 2002-12-06 | Mitsubishi Electric Corp | Electric rotating machine and hermetic sealed compressor using the same |
| CN203205994U (en) * | 2013-02-02 | 2013-09-18 | 宋社民 | Novel stator capable of reducing switch reluctance motor noise |
| KR101462786B1 (en) * | 2013-06-11 | 2014-11-21 | 뉴모텍(주) | Insulation structure for motor |
| CN104283391A (en) * | 2013-07-02 | 2015-01-14 | 日本电产株式会社 | Motor |
| JP2017079553A (en) * | 2015-10-21 | 2017-04-27 | トヨタ自動車株式会社 | Stator for electric motor |
| CN206341045U (en) * | 2016-12-21 | 2017-07-18 | 中山市富加电器制品有限公司 | A kind of modularity motor stator and motor |
| JP2017229111A (en) * | 2016-06-20 | 2017-12-28 | マブチモーター株式会社 | Stator and motor |
-
2018
- 2018-09-04 JP JP2018165425A patent/JP2020039218A/en active Pending
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2019
- 2019-09-04 CN CN201910833606.6A patent/CN110875642A/en active Pending
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| JPS55173260U (en) * | 1979-05-28 | 1980-12-12 | ||
| JPH0533653U (en) * | 1991-10-02 | 1993-04-30 | 松下電器産業株式会社 | Brushless motor |
| JP2002354737A (en) * | 2001-05-30 | 2002-12-06 | Mitsubishi Electric Corp | Electric rotating machine and hermetic sealed compressor using the same |
| CN203205994U (en) * | 2013-02-02 | 2013-09-18 | 宋社民 | Novel stator capable of reducing switch reluctance motor noise |
| KR101462786B1 (en) * | 2013-06-11 | 2014-11-21 | 뉴모텍(주) | Insulation structure for motor |
| CN104283391A (en) * | 2013-07-02 | 2015-01-14 | 日本电产株式会社 | Motor |
| JP2017079553A (en) * | 2015-10-21 | 2017-04-27 | トヨタ自動車株式会社 | Stator for electric motor |
| JP2017229111A (en) * | 2016-06-20 | 2017-12-28 | マブチモーター株式会社 | Stator and motor |
| CN206341045U (en) * | 2016-12-21 | 2017-07-18 | 中山市富加电器制品有限公司 | A kind of modularity motor stator and motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020039218A (en) | 2020-03-12 |
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