WO2013121753A1 - モーターのステーター・コア及び製造方法 - Google Patents
モーターのステーター・コア及び製造方法 Download PDFInfo
- Publication number
- WO2013121753A1 WO2013121753A1 PCT/JP2013/000677 JP2013000677W WO2013121753A1 WO 2013121753 A1 WO2013121753 A1 WO 2013121753A1 JP 2013000677 W JP2013000677 W JP 2013000677W WO 2013121753 A1 WO2013121753 A1 WO 2013121753A1
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- WIPO (PCT)
- Prior art keywords
- stator core
- yoke
- displacement
- motor
- annular member
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000006073 displacement reaction Methods 0.000 claims abstract description 87
- 230000002093 peripheral effect Effects 0.000 claims abstract description 58
- 238000003825 pressing Methods 0.000 claims abstract description 27
- 230000004907 flux Effects 0.000 claims abstract description 24
- 238000003754 machining Methods 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 5
- 230000011218 segmentation Effects 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 241000255777 Lepidoptera Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- 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
-
- 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
-
- 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
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- the present invention relates to a stator core for a motor and a manufacturing method thereof.
- FIG. 19 is a front view of the main part showing a state in which the stator core is baked into the core case
- FIG. 20 is a front view of the main part of the stator core
- FIG. FIG. 22 is a cross-sectional view showing a state in which the stator core is baked into the core case.
- stator case cores 101A, 101B, and 101C of the motor core cores 103A, 103B, and 103C are joined in an annular shape, and the core case 105A, which is an annular member, is formed by shrinkage. It is stored and fixed in 105B and 105C.
- stator core 101A shown in FIGS. 19 and 20 is provided with a slit 101Aa so as not to generate compressive stress, and the stator cores 103B and 103C shown in FIGS. 21 and 22 have holes 103Ba that reduce the compressive stress. , 103Ca are formed.
- the slits 101Aa and the holes 103Ba and 103Ca cause an increase in magnetic resistance at the portions, and thus there is a problem of deteriorating magnetic characteristics.
- FIG. 23 is a front view of a principal part showing a state of stress generation in a state where the stator core is baked into the core case
- FIG. 24 is a state of magnetic flux formation in the state where the stator core is baked into the core case. It is a principal part front view shown.
- the radial thickness a of the yoke portion 101Da included in the stator core 101D is formed to be smaller than the radial thickness b of the core case 105D.
- the problem to be solved is that the reduction of the compressive stress due to the slits and holes causes an increase in the magnetic resistance and the magnetic characteristics are lowered, and the setting of the thickness of the annular member and the yoke part has a difficulty in reducing the magnetic resistance. It is.
- the present invention comprises an annular yoke portion and a tooth portion projecting radially inwardly on the inner periphery of the yoke portion, and the outer peripheral edge of the yoke portion is attached to the inner peripheral surface of the annular member in order to further improve the magnetic characteristics.
- a stator core of a motor wherein the yoke portion is displaced by receiving a pressing force radially inward from the annular member, and is deformed according to the displacement of the displacement portion to generate a tensile stress.
- the displacement portion is the yoke portion Before the attachment to the annular member, the displacement is performed by attaching the yoke portion to the annular member so as to protrude radially outward from the inner diameter of the inner peripheral surface of the annular member after the attachment. That And butterflies.
- a stator core manufacturing method for manufacturing a stator core of the motor comprising: a divided body processing step for processing a plurality of stator core divided bodies including the displacement portion and the deformation portion; and the plurality of stator cores
- the divided body is annularly arranged by facing each divided edge in the circumferential direction, and attached to the inner circumferential surface of the annular member with a fastening margin radially inward, and the deformed portion is deformed by the displacement of the displaced portion.
- the stator core manufacturing method is characterized by comprising an assembling step.
- a stator core manufacturing method for manufacturing a stator core of the motor, the core processing step including the displacement portion and the deformation portion to form a ring-shaped stator core before being attached to the annular member A stator core manufacturing method comprising: mounting the stator core on an inner periphery of the annular member with a radially inward tightening allowance, and causing the deformation portion to be deformed by displacement of the displacement portion.
- the deformable portion can be deformed in accordance with the displacement of the displaceable portion that has been displaced by receiving the pressing force from the annular member inward in the radial direction, and tensile stress can be generated.
- this tensile stress it is possible to form a tensile stress region in which the magnetic flux passes between the teeth portion and the yoke portion, or to cancel the compressive stress of the yoke portion generated by the pressing force from the annular member.
- the magnetic resistance of the yoke portion can be reduced or the compressive stress of the yoke portion can be reduced or reduced to zero by the tensile stress region of the yoke portion of the stator core.
- stator core manufacturing method of the present invention has the above-described configuration, a plurality of stator core divided bodies are manufactured, and the plurality of stator core divided bodies are annularly arranged in the circumferential direction so as to have a diameter on the inner periphery of the annular member.
- stator core manufacturing method of the present invention has the above-described configuration, a stator core semi-finished product is manufactured, and the stator core semi-finished product is attached to the inner periphery of the annular member with a tightening margin radially inward.
- a tensile stress region can be formed, or the compressive stress can be reduced or zero.
- Example 1 It is a principal part front view which shows the state which shrink-fitted the stator core to the motor case.
- Example 1 It is a surrounding side view of a stator core.
- Example 1 It is sectional drawing which shows lamination
- Example 1 It is a principal part front view which shows the stator core division body processed by a division body manufacturing process.
- Example 1 It is a principal part front view which shows the alignment state of the stator core division
- Example 1 It is a principal part front view which shows the state which shrink-fitted the stator core to the motor case.
- Example 2 It is a principal part front view which shows the alignment state of the stator core division
- Example 2 It is a principal part front view which shows the state which shrink-fitted the stator core to the motor case.
- Example 3 It is a principal part front view which shows the matching state of the stator core division body before shrinking.
- Example 3 It is a principal part front view which shows the state which shrink-fitted the stator core to the motor case.
- Example 4 It is a principal part front view which shows the matching state of the stator core division body before shrinking.
- Example 4 It is a principal part front view which shows the state which shrink-fitted the stator core to the motor case.
- Example 5 It is process drawing which shows a stator core manufacturing method.
- Example 5 It is a principal part front view which shows the state of the stator core before shrinking.
- Example 5 It is a principal part front view which shows the stator core before shrinkage shrinkage with the motor case before shrinkage shrinkage.
- Example 5 It is a principal part front view which shows the stator core before shrinkage shrinkage with the motor case before shrinkage shrinkage.
- Example 6) It is a principal part front view which shows the state which shrink-fitted the stator core to the motor case.
- Example 6) It is a principal part front view which shows the state which shrink-fitted the stator core to the core case.
- (Conventional example) It is a principal part front view of a stator core.
- (Conventional example) It is a principal part front view which shows the state which shrink-fitted the stator core to the core case.
- (Conventional example) It is sectional drawing which shows the state which shrink-fitted the stator core to the core case.
- (Conventional example) It is a principal part front view which shows the stress generation
- (Conventional example) It is a principal part front view which shows the magnetic flux formation state in the state where the stator core was shrunk into the core case.
- annular yoke portion 3 and a tooth portion 5 projecting radially inwardly on the inner periphery of the yoke portion 3 are provided.
- the stator core 1 of the motor attached to the peripheral surface 7a, wherein the yoke portion 3 is displaced in response to a pressing force from the annular member 7 inward in the radial direction, and is deformed according to the displacement of the displacement portion D.
- a tensile stress region ⁇ 1 is generated to form a tensile stress region A through which magnetic flux passes between the teeth portion 5 or a compressive stress ⁇ 2 generated by the pressing force from the annular member 7 is offset.
- the displacement part D protrudes radially outward from the inner diameter of the inner peripheral surface 7a of the annular member 7 after being attached before the yoke part 3 is attached to the annular member 7, and the annular member 7 of the yoke part 3 is projected. It changes depending on the installation with tightening allowance. It was realized by the stator core 1 of the motor that performed the position.
- FIG. 1 is a front view of a main part showing a state in which the stator core is baked into a motor case
- FIG. 2 is a peripheral side view of the stator core
- FIG. 3 is a partially omitted cross-section showing lamination of the stator core.
- the stator core 1 is formed of, for example, a magnetic electromagnetic steel plate, and has an annular yoke portion 3 and a plurality of teeth portions projecting radially inwardly on the inner periphery of the yoke portion 3. It consists of five.
- the outer peripheral edge 3a of the yoke part 3 is formed in a substantially circular shape, and the inner peripheral edges 3b and 3c are linearly formed symmetrically in the circumferential direction between the tooth parts 5 and intersect at an angle.
- stator cores 1 are laminated, and the outer peripheral edge of each laminated yoke part 3 is attached to the inner peripheral surface 7a of the motor case 7 which is an annular member with a tightening margin. This attachment is performed, for example, by shrinking.
- the yoke portion 3 is attached with an allowance to the inner side in the radial direction of the motor case 7, and the outer peripheral edge 3a and the inner peripheral surface 7a are joined without a gap and have substantially the same curvature.
- the yoke part 3 has a displacement part D and a deformation part T.
- the displacement portion D is displaced by receiving a pressing force from the motor case 7 inward in the radial direction.
- the deformation portion T is deformed according to the displacement of the displacement portion D and generates a tensile stress ⁇ 1 in the yoke portion 3.
- a tensile stress area A through which magnetic flux passes between each tooth portion 5 is formed by the tensile stress ⁇ 1.
- the compressive stress ⁇ 2 generated by the pressing force from the motor case 7 can be offset by the generated tensile stress ⁇ 1, and the compressive stress can be reduced or made zero.
- the stator core 1 is composed of a plurality of stator core divided bodies 9.
- Each stator core divided body 9 is obtained by dividing the yoke portion 3 into a plurality of circumferential directions by dividing lines 11 extending from the inner periphery to the outer periphery.
- Each stator core divided body 9 is configured for each tooth portion 5 provided with a yoke portion constituting portion 9a.
- Each stator core divided body 9 is annularly arranged at each dividing line 11 with each dividing edge 11a, 11b facing each other in the circumferential direction.
- the yoke portion 3 has an outer portion 13 and an inner portion 15 that are radially inner and outer divided by the dividing line 11.
- Each outer portion 13 is disposed so as to protrude along one circumferential direction side of the yoke portion constituting portion 9a, and the inner portion 15 is located on the inner diameter side of the outer portion 13 along the other circumferential side of the yoke portion constituting portion 9a. It is arranged to protrude.
- each outer portion 13 extends in the circumferential direction on the outer peripheral side of each yoke portion constituting portion 9a, and one side 13a of the outer portion 13 on one side in the circumferential direction of each tooth portion 5 is the other side 13b.
- the length is set longer than.
- a convex portion 17 in the circumferential direction is provided on one side 13a of each outer portion 13 on the radially inner edge side.
- each convex part 17 is fitted into each concave part 19 without a gap.
- the fitting of the concavo-convex portions 19 and 17 between the outer portions 13 constitutes an engaging portion provided between the stator / core divided bodies 9, and the deformed portion T of one stator / core divided body 9 is formed. The other stator / core divided body 9 is engaged to cause deformation.
- each outer portion 13 and the radially outer edge 15a of each inner portion 15 face each other without a gap, and the leading edge 15b of each inner portion 15 faces each tooth portion 5 without a gap in the circumferential direction.
- the dividing line 11 is formed to reach the inner and outer peripheries of the yoke portion 3. That is, the dividing line 11 is between the adjacent one side 13a and the other side 13b of each outer part 13 between the adjacent parts of each stator / core divided body 9, between each convex part 17 and each concave part 19, and the diameter of each outer part 13. It extends between the inner edge 13 c in the direction and the radially outer edge 15 a of each inner part 15, and between the tip edge 15 b of each inner part 15 and each tooth part 5.
- FIG. 4 is a process diagram showing a stator core manufacturing method
- FIG. 5 is a front view of a main part showing a stator core divided body processed in the divided body machining step
- FIG. 6 is a stator core divided before shrinking. It is a principal part front view which shows the alignment state of a body with the motor case before shrink shrinkage.
- the stator core manufacturing method of the present embodiment includes a divided body processing step S1 and an assembly step S2 for manufacturing the stator core 1 of the motor.
- the divided body machining step S1 forms a plurality of circumferentially divided stator cores 9 as shown in FIG. 5 divided by the dividing line 11 shown in FIG.
- Each stator core divided body 9 is formed with an outer portion 13 having a yoke portion constituting portion 9a, an outer portion 15, a convex portion 17, and a concave portion 19, and includes a displacement portion D and a deformation portion T.
- each outer portion 13 is formed in an arc shape having a larger curvature than the inner diameter of the inner peripheral surface 7a that has been shrink-fitted after attachment before attachment to the motor case 7.
- a straight edge portion 13ca on the convex portion 17 side and a straight edge portion 13cb on the one side of each tooth portion 5 are formed and intersected with each other.
- a linear edge 15aa on the concave portion 19 side and a linear edge 15ab on the tip edge 15b side of each inner portion 15 are formed on the radially outer edge 15a of each inner portion 15 and set to intersect each other.
- the inner peripheries 3b and 3c of the yoke part 3 are formed on the radially inner edge 15c of each inner part 15.
- stator / core divided bodies 9 are annularly arranged with the divided edges 11a and 11b facing in the circumferential direction.
- each outer portion 13 of each stator / core divided body 9 aligned as a ring is used as a displacement portion D in FIG.
- a gap is also formed between the one side 13a tip 13aa of each outer part 13 and the other side 13b tip 13ba of each outer part 13 adjacent thereto.
- the straight edge 13cb of the radially inner edge 13c of each outer part 13 is between the straight edge 15ab of the radially outer edge 15a of each inner part 15 before shrinkage of the motor case 7 to which the yoke part 3 is fixed.
- a gap is formed in
- each inner portion 15 has a gap with respect to one side of each tooth portion 5 before shrinkage shrinkage of the motor case 7, and also has a gap between the convex portion 17 and the concave portion 19. Yes.
- Each stator core divided body 9 arranged annularly in the circumferential direction is attached to the inner circumference of the motor case 7 with a shrinkage inward in the radial direction by shrinkage, and the state shown in FIG. 1 is obtained.
- each outer portion 13 receives a pressing force radially inward from the motor case 7 and is displaced radially inward, and the outer portion 13 is indicated by an arrow through the engagement of the concave and convex portions 19 and 17.
- the deformed portion T is deformed, and the radially outer edge 13d is in a state along the inner peripheral surface 7a after shrinkage shrinkage.
- each stator core divided body 9 is annularly arranged before shrinking into the motor case 7, between the tip edge 15b of each inner portion 15 and each tooth portion 5, between the convex portion 17 and the concave portion 19,
- the assembling can also be performed by performing the facing without a gap in the circumferential direction.
- the yoke portion 3 is a displacement portion D that is displaced by receiving a pressing force radially inward from the motor case 7 and is deformed according to the displacement of the displacement portion D.
- a deformation portion T that generates a tensile stress ⁇ 1 and forms a tensile stress region A through which a magnetic flux passes between the teeth portion 5 or cancels a compressive stress ⁇ 2 generated by a pressing force from the motor case 7;
- the displacement portion D protrudes radially outward from the inner diameter dimension of the inner peripheral surface 7a of the motor case 7 after being attached before the yoke portion 3 is attached to the motor case 7. Fastening to case 7 Displacement was performed by mounting with a margin.
- the yoke portion 3 is deformed according to the displacement of the displacement portion D of the deformation portion T, and the tensile stress ⁇ 1 is generated on the inner diameter side as shown in FIG. A tensile stress region A through which magnetic flux passes can be formed.
- the compressive stress ⁇ 2 generated by the pressing force from the motor case 7 can be offset by the generated tensile stress ⁇ 1, and the compressive stress can be reduced or made zero.
- a stator core divided body 9 having a tooth portion 5 and a yoke portion constituting portion 9a divided into a plurality of circumferential directions by division at a dividing line 11 over the inner and outer circumferences of the yoke portion 3 is provided.
- the body 9 is annularly arranged with the divided edges 11a and 11b of each division facing each other in the circumferential direction, and the deformed portion T of one stator / core divided body 9 is interposed between the stator / core divided bodies 9 in the other stator.
- -Engagement parts 17 and 19 which are engaged with the core divided body 9 and cause deformation are provided.
- the stator core 1 can be constituted by each stator core divided body 9, and in each stator core divided body 9 arranged annularly in the divided circumferential direction, the displacement portion D caused by each uneven portion 17, 19 is formed.
- the displacement can be surely performed, and it can be securely fixed to the motor case 7, and the above-mentioned effect can be obtained.
- the yoke part 3 has an outer part 13 and an inner part 15 that are radially outer and formed in the circumferential direction in each division, and the outer part 13 protrudes along one circumferential direction side of the yoke part constituting part 9a.
- the inner portion 15 is arranged so as to protrude along the other circumferential side of the yoke portion constituting portion 9a on the inner diameter side with respect to the outer portion 13, and the radially outer edge 13d side of the outer portion 13 is a displacement portion.
- D is made to project radially outward before attaching the yoke part 3 to the motor case 7, and the radially inner edge 13 c side of the outer part 13 is the deformed part T to the motor case 7 of the yoke part 3. Before the attachment, there is a gap between the inner edge 15 and the outer edge 15a in the radial direction. Deform It was.
- the displacement portion D of the outer portion 13 is displaced by receiving a pressing force radially inward, and the deformation portion T is deformed.
- a tensile stress ⁇ 1 is generated on the radial inner edge 13c side, and a magnetic flux is generated between each tooth portion 5 with this tensile stress ⁇ 1.
- a tensile stress region A can be formed.
- the compressive stress ⁇ 2 generated on the radial outer edge 13d side of each outer portion 13 generated by the pressing force from the motor case 7 is canceled by the generated tensile stress ⁇ 1, and the compressive stress is reduced or made zero. it can.
- Each inner portion 15 has a circumferential clearance with respect to each tooth portion 5 before being attached to the motor case, and is opposed to the clearance without any gap by being attached to the motor case, or the outer portion 13 When compressive stress is generated on the outer diameter side, the compressive stress is smaller (including zero) than that on the outer diameter side.
- each outer portion 13 When each outer portion 13 is assembled from the curved protruding state of FIG. 6 to the state of FIG. 1, the radially outer edge 13 d of each outer portion 13 is frictionally engaged with the inner peripheral surface 7 a of the motor case 7 and securely fixed. Is done. By fixing by this frictional engagement, it is possible to reduce the tightening margin due to shrinkage to the motor case 7 and to reduce the compressive stress ⁇ 2 acting on the outer portion 13.
- FIGS. 7 and 8 relate to a second embodiment of the present invention
- FIG. 7 is a front view of a main part showing a state in which the stator core is baked into the motor case
- FIG. It is a principal part front view which shows the alignment state of a division body with the motor case before shrinkage shrinkage.
- the basic configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, the corresponding components are denoted by A, and redundant description is omitted.
- the stator core 1A of the present embodiment also includes outer portions 13A and inner portions 15A.
- the outer portion 13 ⁇ / b> A is integrally disposed so as to protrude to one side in the circumferential direction of the yoke portion constituting portion 9 ⁇ / b> Aa on the outer diameter side of each tooth portion 5.
- the inner portion 15A is integrally disposed so as to protrude to the other circumferential side of the yoke portion constituting portion 9Aa.
- the inclined surfaces 13Aaa and 13Aba constitute the engaging portion.
- the inclined surface 13Aaa is formed at the distal end of the outer portion 13A, and the inclined surface 13Aba is formed at the proximal end of the outer portion 13A.
- the dividing line 11A is formed so as to reach the inner periphery of the yoke portion 3A. That is, the dividing line 11A includes the inclined surfaces 13Aaa and 13Aba between the outer portions 13A, the radial inner edges 13Ac of the outer portions 13A and the radial outer edges 15Aa of the inner portions 15A, and the leading edges 15Ab of the inner portions 15A. It has the division
- each outer portion 13A continues in a circular shape along the inner peripheral surface 7a of the motor case 7 and has substantially the same curvature as the inner peripheral surface 7a.
- stator core divided body 9A provided with the displacement portion D and the deformed portion T is formed in the divided body processing step S1, and in the assembly step S2, each stator core divided body 9A is formed as shown in FIG.
- the respective divided edges 11Aa and 11Ab are arranged in an annular shape so as to face each other in the circumferential direction.
- the inner diameter dimension of the inner peripheral surface 7a of the motor case 7 in other words, that is, the outer dimension of the outer peripheral edge 3Aa of the yoke portion 3A protrudes radially outward. With this protrusion, a gap is formed between the radial outer edge 13Ad and the inner peripheral surface 7aa before shrinkage shrinkage of the motor case as shown in FIG.
- each outer portion 13A forms a gap with the radially outer edge 15Aa of each inner portion 15A before shrinkage shrinkage of the motor case 7 of the yoke portion 3A as a part of the deformed portion T. .
- This gap is set, for example, by making the curvature of the radially inner edge 13Ac slightly larger than the curvature of the radially outer edge 15Aa.
- each inner portion 15A has a gap with respect to one side of each tooth portion 5 before being attached to the motor case 7 by shrinkage.
- Each stator core divided body 9 ⁇ / b> A arranged annularly in the circumferential direction is attached to the inner circumferential surface 7 a of the motor case 7 with shrinkage to the inside in the radial direction by shrinkage, resulting in the state of FIG. 7.
- each outer portion 13 ⁇ / b> A receives a pressing force radially inward from the motor case 7 and is displaced radially inward, and the engagement of the inclined surfaces 13 ⁇ / b> Aaa and 13 ⁇ / b> Aba while deforming the deformation portion T by a relative displacement due to the thrust P a along the focus and tilt the radial outer edge 13Ad a state along the inner peripheral surface 7a.
- each stator core division body 9A is annularly arranged before shrinking into the motor case 7, the front edge 15Ab of each inner portion 15A and each tooth portion 5 are opposed to each other with no gap in the circumferential direction. It is also possible to perform the assembly.
- each stator core division body 9A can be assembled
- a tensile stress ⁇ 1 is generated on the radially inner edge 13Ac side by the deformation according to the displacement of the displacement portion D of the deformable portion T, and a tensile force that passes the magnetic flux between each tooth portion 5 by this tensile stress ⁇ 1.
- a stress region A can be formed.
- the compressive stress ⁇ 2 generated on the radial outer edge 13Ad side of each outer portion 13A generated by the pressing force from the motor case 7 is offset by the generated tensile stress ⁇ 1, and the compressive stress is reduced or made zero. it can.
- a slight gap may be formed between the radially inner edge 13Ac of each outer portion 13A and the radially outer edge 15Aa of each inner portion 15A after assembly. This gap is along the direction in which the magnetic flux passes and has no effect.
- FIGS. 9 and 10 relate to a third embodiment of the present invention
- FIG. 9 is a front view of a main part showing a state in which the stator core is baked into the motor case
- FIG. 10 is a view of the stator core before staking. It is a principal part front view which shows the alignment state of a division body. Note that the basic configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, the corresponding components are denoted by the same reference numerals B, and redundant description is omitted.
- the stator core 1B of the present embodiment is also composed of a plurality of stator core divided bodies 9B provided with a displacement portion D and a deformation portion T.
- Each stator core divided body 9B is formed by dividing the yoke portion 3B into a plurality of circumferential directions by dividing lines 11B extending over the inner and outer circumferences.
- the outer peripheral edge 3Ba of the yoke portion 3B has the same curvature as the inner peripheral surface 7a of the motor case 7, and each stator Inner peripheral edges 3Bb and 3Bc are formed on both sides in the circumferential direction of the core divided body 9B.
- Each stator core divided body 9B is configured for each tooth portion 5 including a yoke portion constituting portion 9Ba.
- Each stator / core divided body 9B is annularly arranged at each dividing line 11B so that the divided edges 11Ba and 11Bb face each other in the circumferential direction without any gap.
- Each stator core divided body 9B includes a pair of slits 21a and 21b without gaps in each yoke part constituting part 9Ba, and rotating parts 23a and 23b between the slits 21a and 21b and adjacent to each yoke part constituting part 9Ba. It has.
- Each slit 21a, 21b is formed from the radial outer edge 13Bd to the intermediate portion in the radial direction. Holes 21aa and 21ba are formed in the inner ends of the slits 21a and 21b. Semi-circular portions 25a, 25b corresponding to the holes 21aa, 21ba in the radial direction are formed in the inner peripheral edges 3Bb, 3Bc on both sides in the circumferential direction of each stator core divided body 9B. Between the holes 21aa and 21ba and the semicircular portions 25a and 25b, a deformed portion T is formed.
- the concavo-convex portions 17B and 19B provided on the divided edges 11Ba and 11Bb between the circumferential portions of the rotating portions 23a and 23b constitute the engaging portions.
- stator core divided body 9B having the displacement portion D and the deformed portion T is formed in the divided body processing step S1, and in the assembly step S2, each stator core divided body 9B is formed as shown in FIG. However, each division
- the yoke portion constituting portions 9Ba of the stator core divided bodies 9B that are annularly arranged are formed between the slits 21a and 21b that are a part of the radial outer edge 13Bd.
- 9 is the inner diameter of the inner peripheral surface 7a contracted by shrinkage in FIG. 9 after assembly, in other words, from the outer dimension of the outer peripheral edge 3Ba of the yoke 3B after mounting by shrinkage. Is also protruded radially outward.
- the slits 21a and 21b open in the circumferential direction, and the rotating portions 23a and 23b form gaps corresponding to the slits 21a and 21b between the adjacent rotating portions 23b and 23a by the open state of the slits 21a and 21b. It is in the state before rotation.
- the attachment to the motor case 7 of FIG. 9 by shrinking shrinkage exerts a pressing force radially inward from the motor case 7 to cause the displacement portion D to be displaced via the slits 21a and 21b.
- the rotating portions 23b and 23a are rotated so as to close the gap 21b and the gap, and the deformation portion T is deformed.
- each yoke portion constituting portion 9Ba is frictionally engaged with the inner peripheral surface 7a of the motor case 7 as shown in FIG.
- the divided body 9B can be stably assembled in an annular shape.
- the tensile stress ⁇ 1 is generated by deformation according to the displacement of the displacement portion D of the deformation portion T, and the tensile stress region A through which the magnetic flux passes between each tooth portion 5 can be formed by the tensile stress ⁇ 1.
- the compressive stress ⁇ 2 generated by the pressing force from the motor case 7 can be offset by the generated tensile stress ⁇ 1, and the compressive stress can be reduced or made zero.
- FIGS. 11 and 12 relate to a fourth embodiment of the present invention
- FIG. 11 is a front view of a main part showing a state in which the stator core is baked into the motor case
- FIG. 12 is a view of the stator core before staking. It is a principal part front view which shows the alignment state of a division body.
- the basic configuration is the same as that of the third embodiment.
- the same components are denoted by the same reference numerals, and the corresponding components are denoted by the same reference characters B instead of C, and redundant description is omitted. .
- a single slit 21C was formed in the center of each yoke portion constituting portion 9Ca of each stator core divided body 9C.
- the semicircular portions 25Ca and 25Cb constituting the deformed portion T between the holes 21Ca are provided at the corner portions between the yoke portion constituting portions 9Ca and the tooth portions 5.
- both sides of the slit 21C are configured as rotating portions 23Ca and 23Cb, and the slit 21C side of the rotating portions 23Ca and 23Cb is configured as a displacement portion D.
- the yoke portion constituting portions 9Ca of the stator / core divided bodies 9C arranged in a ring form the displacement portions D on the slits 21C side of the rotating portions 23Ca and 23Cb. 11, the inner diameter of the inner peripheral surface 7a contracted by shrinkage in FIG. 11, in other words, protrudes radially outward from the outer dimension of the outer peripheral edge 3Ca of the yoke portion 3C after being attached by shrinkage. .
- the slit 21C opens in the circumferential direction, and the rotating part 23Ca, 23Cb opens before the rotation so as to form a gap corresponding to the slit 21C between the adjacent rotating part 23Cb, 23Ca by the open state of the slit 21C. It is in a state.
- the attachment by shrinkage to the motor case 7 in FIG. 11 causes a pressing force radially inward from the motor case 7 to act, causing the displacement portion D to be displaced via the slit 21C, and the slit 21C and the gap to be formed.
- the rotating portions 23Cb and 23Ca are rotated so as to be closed, and the deformation portion T is deformed.
- each yoke portion constituting portion 9Ca is frictionally engaged with the inner peripheral surface 7a of the motor case 7 as shown in FIG.
- the divided body 9C can be stably assembled in an annular shape.
- the tensile stress ⁇ 1 is generated by deformation according to the displacement of the displacement portion D of the deformation portion T, and the tensile stress region A through which the magnetic flux passes between each tooth portion 5 can be formed by the tensile stress ⁇ 1.
- the compressive stress ⁇ 2 generated by the pressing force from the motor case 7 can be offset by the generated tensile stress ⁇ 1, and the compressive stress can be reduced or made zero.
- FIGS. 13 to 16 relate to a fifth embodiment of the present invention
- FIG. 13 is a front view of the main part of the stator core
- FIG. 14 is a process diagram showing a method for manufacturing the stator core
- FIG. FIG. 16 is a front view of an essential part showing the stator core before shrinkage and the motor case before shrinkage shrinkage.
- the basic configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, the corresponding components are denoted by the same reference numerals, and redundant description is omitted.
- the yoke portion 3D has a ring shape continuous in the circumferential direction.
- the present embodiment does not include the uneven portions 19 and 17 that are the engaging portions of the first embodiment, and the inner portion 15D is formed in a ring shape continuous in the circumferential direction.
- the stator core manufacturing method of the present embodiment includes a core machining step S10 and an assembly step S11 for manufacturing the stator core 1D of the motor.
- the stator core 1D shown in FIG. 15 is formed.
- the stator core 1D includes an outer portion 13D, an inner portion 15D, a yoke portion 3D, and a teeth portion 5D, and the radially outer edge 13Dd side of each outer portion 13D protrudes radially outward.
- each outer portion 13D of the stator core 1D is the inner diameter dimension of the inner peripheral surface 7a contracted by shrinkage in FIG. 13 after assembly, in other words, attached by shrinkage.
- the outer dimension of the outer peripheral edge 3Da of the rear yoke portion 3D is projected outward in the radial direction.
- the stator core 1Da shown in FIG. 15 is stacked in the plate thickness direction and arranged on the inner periphery of the motor case 7 as shown in FIG. At this time, the inner portion 15D and the teeth portion 5D are integrated, and no gap is formed between them, but the gaps of the other portions are the same as in the first embodiment.
- the stator core 1D disposed on the inner periphery of the motor case 7 is attached with a tightening inward in the radial direction by shrinkage, and the state shown in FIG. 13 is obtained.
- the deforming portion T When the deforming portion T is deformed in accordance with the displacement of the displacement portion D of the outer portion 13D, the outer portion 13D is pressed against the inner peripheral surface 7a of the motor case 7 and frictionally engaged, and the stator core 1D is securely fixed. Can be done.
- a tensile stress ⁇ 1 is generated on the radial inner edge 13Dc side by deformation corresponding to the displacement of the displacement portion D of the deformation portion T, and the tensile stress ⁇ 1 allows the magnetic flux to pass between each tooth portion 5.
- a stress region A can be formed.
- the compressive stress ⁇ 2 generated on the radial outer edge 13Dd side of each outer portion 13D generated by the pressing force from the motor case 7 is offset by the generated tensile stress ⁇ 1, and the compressive stress is reduced or made zero. it can.
- this embodiment can achieve the same effects as those of the first embodiment.
- stator core 1Da is not divided, it is easy to handle, has a small number of parts, and can be easily assembled and managed.
- a slight gap may be formed between the radially inner edge 13Dc of each outer portion 13D and the radially outer edge 15Da of each inner portion 15D. This gap is along the direction in which the magnetic flux passes and has no effect.
- FIGS. 17 and 18 relate to a sixth embodiment of the present invention.
- FIG. 17 is a front view of a main part showing the stator core before shrinkage together with the motor case before shrinkage shrinkage.
- FIG. 18 is the stator core. It is a principal part front view which shows the state which baked and was stuffed into the motor case. Note that the basic configuration is the same as that of the fifth embodiment, and the reference numeral D is substituted for E, and redundant description is omitted.
- the yoke portion 3E has a ring shape continuous in the circumferential direction as in the fifth embodiment.
- the circumferential length of the outer part 13E was formed longer than that of Example 5.
- each outer portion 13E strongly abuts the adjacent other circumferential portion 13Eb tip 13Eba of each adjacent outer portion 13E, and at the same time a thrust is generated on the contact surface, simultaneously, each outer portion 13E is circled. Circumferential compressive stress is generated.
- Compressive stress is generated in the circumferential direction of the outer portion 13E according to this compressive stress. Due to the compressive stress, a force is generated to cause each outer portion 13E itself to extend in the circumferential direction. By this force, the inner portion 15E is also stretched in the circumferential direction, and a tensile stress is generated as a whole. By increasing the magnetic permeability of the yoke portion 3E by this tensile stress and reducing the iron loss, the output / efficiency of the motor can be increased.
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Abstract
Description
[ステーター・コア製造方法]
図4は、ステーター・コア製造方法を示す工程図、図5は、分割体加工工程で加工されるステーター・コア分割体を示す要部正面図、図6は、焼きバメ前におけるステーター・コア分割体の合わせ状態を焼きバメ収縮前のモーター・ケースと共に示す要部正面図である。
本発明の実施例1では、環状のヨーク部3及びこのヨーク部3の内周に径方向内側へ突出するティース部5からなりヨーク部3の外周縁3aがモーター・ケース7の内周面7aに取り付けられるモーターのステーター・コア1であって、ヨーク部3は、モーター・ケース7から径方向内側へ押圧力を受けて変位した変位部Dと、この変位部Dの変位に応じ変形して引張応力σ1を発生させティース部5との間で磁束を通す引張応力域Aを形成した、又はモーター・ケース7からの押圧力で発生する圧縮応力σ2を相殺した変形部Tとを有し、変位部Dは、ヨーク部3のモーター・ケース7への取り付け前に、取り付けられた後のモーター・ケース7の内周面7aの内径寸法よりも径方向外側へ突出し、ヨーク部3のモーター・ケース7への締め代を持った取り付けにより変位を行った。
ー・コア分割体9Bの周方向両側で内周縁3Bb、3Bcが形成されている。
1Da コア半製品
3、3A、3B、3C、3D ヨーク部
5 ティース部
7 モーター・ケース(環状部材)
7a 内周面
9、9A、9B、9C ステーター・コア分割体
11a、11b 分割縁
13、13A、13D アウター部
13Aaa、13Aba 傾斜面(係合部)
15、15A、15D インナー部
17、17B、17C 凹部(係合部)
19、19B、19C 突部(係合部)
21a、21b、21C スリット
23a、23b 回転部
D 変位部
T 変形部
S1 分割体加工工程
S2、S11 組付け工程
S10 コア半製品加工工程
Claims (14)
- 環状のヨーク部及びこのヨーク部の内周に径方向内側へ突出するティース部からなりヨーク部の外周縁が環状部材の内周面に取り付けられたモーターのステーター・コアであって、
前記ヨーク部は、前記環状部材から径方向内側へ押圧力を受けて変位した変位部と、この変位部の変位に応じ変形して引張応力を発生させ前記ティース部との間で磁束を通す引張応力域を形成し、又は前記環状部材からの押圧力で発生する圧縮応力を相殺した変形部とを有し、
前記変位部は、前記ヨーク部の前記環状部材への取り付け前に前記取り付けられた後の環状部材の内周面の内径寸法よりも径方向外側へ突出し、前記ヨーク部の前記環状部材への締め代を持った取り付けにより前記変位を行った、
ことを特徴とするモーターのステーター・コア。 - 請求項1記載のモーターのステーター・コアであって、
前記ヨーク部での内外周に渡る分割により周方向複数に分割され前記変位部及び変形部を備えたヨーク部構成部を前記ティース部外径側に有するステーター・コア分割体を有し、
前記取り付け前に前記各ステーター・コア分割体を前記各分割による分割縁相互を周方向に対向させて環状に配置して前記締め代を持った取り付けを行った、
ことを特徴とするモーターのステーター・コア。 - 請求項2記載のモーターのステーター・コアであって、
前記各ステーター・コア分割体は、前記各分割で周方向へ形成した径方向外内のアウター部及びインナー部を有し、
前記アウター部を、前記ヨーク部構成部の周方向一側に沿って突出するように配置し、
前記インナー部を、前記アウター部よりも内径側で前記ヨーク部構成部の周方向他側に沿って突出するように配置し、
前記アウター部の径方向外縁側は、前記変位部として前記ヨーク部の前記環状部材への取り付け前に前記径方向外側への突出を行わせ、
前記アウター部の径方向内縁側は、前記変形部として前記ヨーク部の前記環状部材への取り付け前に前記インナー部の径方向外縁との間に隙間を有し、
前記ヨーク部の前記環状部材への締め代を持った取り付けにより前記変位部の変位及び前記変形部の変形を行わせた、
ことを特徴とするモーターのステーター・コア。 - 請求項1~3の何れかに記載のモーターのステーター・コアであって、
前記環状に配置した各ステーター・コア分割体間に、一方のステーター・コア分割体の変形部を他方のステーター・コア分割体に係合させて前記変形の起因とする係合部を設けた、
ことを特徴とするモーターのステーター・コア。 - 請求項4記載のモーターのステーター・コアであって、
前記係合部は、前記各アウター部間に設けられた凹凸部、又は前記各アウター部間に設けられ前記各アウター部の先端を前記各アウター部の基部側に当接させつつ径方向外側へのずれを許容する傾斜面である、
ことを特徴とするモーターのステーター・コア。 - 請求項3記載のモーターのステーター・コアであって、
前記取り付け前に環状に配置したヨーク部構成部の各インナー部は、前記各ティース部との間に周方向の隙間を有し前記環状部材への取り付けにより隙間なく対向して圧縮応力零の状態又は前記アウター部の外径側に圧縮応力が発生したときは外径側よりも圧縮応力が小さい状態となる、
ことを特徴とするモーターのステーター・コア。 - 請求項2記載のモーターのステーター・コアであって、
前記各ヨーク部構成部は、径方向外縁から径方向の中間部まで形成されたスリットとこのスリット及びヨーク部構成部の隣接間に回転部とを備え、
前記環状部材への取り付け前に前記スリットの周方向への開き状態により前記各ヨーク部構成部の径方向外縁の一部は、前記変位部として前記突出を行ない、
前記環状部材への取り付け前に前記スリットの周方向への開き状態により前記回転部は、周方向に隣接する回転部との間で前記スリットに対応した隙間を形成する回転前の状態となり、
前記環状部材への取り付けにより前記スリットによる前記変位部の変位を行わせ、前記スリット及び隙間を閉じるように前記回転部を回転させて前記変形部の変形を行わせた、
ことを特徴とするモーターのステーター・コア。 - 請求項7記載のモーターのステーター・コアであって、
前記環状に配置した各ステーター・コア分割体間に、前記一方の回転部を他方の回転部に係合させて前記回転の起因とする係合部を設けた、
ことを特徴とするモーターのステーター・コア。 - 請求項1記載のモーターのステーター・コアであって、
前記ヨーク部は、周方向に連続したリング状である、
ことを特徴とするモーターのステーター・コア。 - 請求項9記載のモーターのステーター・コアであって、
前記ヨーク部は、径方向外内のアウター部及びインナー部を有し、
前記アウター部は、前記ヨーク部構成部の周方向一側に沿って突出するように配置し、
前記インナー部は、周方向に連続したリング状であり、
前記アウター部の径方向外縁側は、前記変位部として前記ヨーク部の前記環状部材への取り付け前に前記径方向外側への突出を行わせ、
前記アウター部の径方向内縁側は、前記変形部として前記ヨーク部の前記環状部材への取り付け前に前記インナー部との間に隙間を有し
前記ヨーク部の前記環状部材への締め代を持った取り付けにより前記変位部の前記変位及び前記変形部の変形を行わせた、
ことを特徴とするモーターのステーター・コア。 - 請求項10記載のモーターのステーター・コアであって、
前記各アウター部の周方向一側先端が隣接する各アウター部の周方向他側先端に強く当接するように形成し、
前記インナー部に、引張応力を発生させた、
ことを特徴とするモーターのステーター・コア。 - 請求項2~8の何れか1項記載のモーターのステーター・コアを製造するためのステーター・コア製造方法であって、
前記変位部及び変形部を備える複数のステーター・コア分割体を加工する分割体加工工程と、
前記複数のステーター・コア分割体を前記各分割縁の周方向での対向により環状に配置し前記環状部材の内周面に径方向内側への締め代を持って取り付け前記変位部の変位による前記変形部の変形を行わせる組付け工程と、
を備えたことを特徴とするステーター・コア製造方法。 - 請求項9~11記載のモーターのステーター・コアを製造するためのステーター・コア製造方法であって、
前記変位部及び変形部を備え前記環状部材への取り付け前のリング状のステーター・コアを形成するコア加工工程と、
前記ステーター・コアを前記環状部材の内周に径方向内側への締め代を持って取り付け前記変位部の変位による前記変形部の変形を行わせる組付け工程と、
を備えたことを特徴とするステーター・コア製造方法。 - 請求項12又は13記載のステーター・コア製造方法であって、
前記環状部材への取り付けは、焼きバメである、
ことを特徴とするステーター・コア製造方法。
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US14/378,397 US20150042199A1 (en) | 2012-02-14 | 2013-02-07 | Stator core for motor and manufacturing method therefor |
EP13748841.7A EP2816708B1 (en) | 2012-02-14 | 2013-02-07 | Stator core for motor and manufacturing method therefor |
CN201380009144.7A CN104137390A (zh) | 2012-02-14 | 2013-02-07 | 马达的定子铁芯及制造方法 |
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KR101655161B1 (ko) * | 2014-11-24 | 2016-09-07 | 현대자동차 주식회사 | 계자권선형 구동모터의 회전자 |
EP3454455A1 (en) * | 2017-09-11 | 2019-03-13 | KONE Corporation | Method for manufacturing a magnetic core of an electric machine, an electric machine utilizing the magnetic core thereof, and a magnetic core |
CN111224473A (zh) | 2018-11-23 | 2020-06-02 | 福特全球技术公司 | 一种电机的定子铁芯 |
JP7167849B2 (ja) * | 2019-05-21 | 2022-11-09 | 株式会社デンソー | ステータアセンブリ、及び、モータ |
ES2914811T3 (es) * | 2019-05-27 | 2022-06-16 | Magnax Bv | Estator para una máquina de flujo axial |
KR102030455B1 (ko) * | 2019-06-17 | 2019-11-08 | 엘지이노텍 주식회사 | 모터 |
EP3920374A4 (en) | 2019-07-02 | 2022-03-16 | Samsung Electronics Co., Ltd. | ENGINE AND COMPRESSOR WITH SUCH ENGINE |
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2013
- 2013-02-07 KR KR1020147024019A patent/KR20140128369A/ko active IP Right Grant
- 2013-02-07 EP EP13748841.7A patent/EP2816708B1/en not_active Not-in-force
- 2013-02-07 US US14/378,397 patent/US20150042199A1/en not_active Abandoned
- 2013-02-07 WO PCT/JP2013/000677 patent/WO2013121753A1/ja active Application Filing
- 2013-02-07 CN CN201380009144.7A patent/CN104137390A/zh active Pending
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Also Published As
Publication number | Publication date |
---|---|
EP2816708B1 (en) | 2016-09-21 |
KR20140128369A (ko) | 2014-11-05 |
JP2013169042A (ja) | 2013-08-29 |
CN104137390A (zh) | 2014-11-05 |
US20150042199A1 (en) | 2015-02-12 |
EP2816708A1 (en) | 2014-12-24 |
EP2816708A4 (en) | 2015-11-11 |
JP5993580B2 (ja) | 2016-09-14 |
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