CN113555985A - Rotor of rotating electric machine and method for manufacturing same - Google Patents
Rotor of rotating electric machine and method for manufacturing same Download PDFInfo
- Publication number
- CN113555985A CN113555985A CN202110395642.6A CN202110395642A CN113555985A CN 113555985 A CN113555985 A CN 113555985A CN 202110395642 A CN202110395642 A CN 202110395642A CN 113555985 A CN113555985 A CN 113555985A
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- Prior art keywords
- diameter side
- columnar member
- magnetic flux
- hole
- flux shielding
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title description 3
- 238000003780 insertion Methods 0.000 claims abstract description 133
- 230000037431 insertion Effects 0.000 claims abstract description 133
- 230000004907 flux Effects 0.000 claims abstract description 105
- 239000000853 adhesive Substances 0.000 claims abstract description 73
- 230000001070 adhesive effect Effects 0.000 claims abstract description 73
- 239000000463 material Substances 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000003475 lamination Methods 0.000 claims description 9
- 238000010030 laminating Methods 0.000 claims description 7
- 238000005304 joining Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 description 7
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
A rotor of a rotating electrical machine and a method of manufacturing the same, which can reduce the material consumption of an adhesive by reducing the amount of the adhesive used to fill the gap between a rotor core and a permanent magnet for fixing the permanent magnet. The rotor core includes: a magnet insertion hole to which the inserted permanent magnet is fixed by an adhesive (7); an inner diameter side magnetic flux shielding hole provided at an end portion on an inner diameter side of the magnet insertion hole; an outer diameter side magnetic flux shielding hole provided at an outer diameter side end of the magnet insertion hole (5); and an inner diameter side columnar member and an outer diameter side columnar member which are arranged between the permanent magnet and the inner diameter side magnetic flux shielding hole and the outer diameter side magnetic flux shielding hole.
Description
Technical Field
The present application relates to a rotor of a rotating electric machine and a manufacturing method thereof.
Background
A rotating electric machine that is mounted on a vehicle such as a hybrid vehicle or an electric vehicle and used as a motor or a generator includes a rotor including a rotor core formed by laminating electromagnetic steel plates and a permanent magnet fixed to the rotor core. Magnet insertion holes for inserting permanent magnets are provided in the rotor core, and the rotor is manufactured by inserting the permanent magnets into the magnet insertion holes. Since there is a risk that the permanent magnets are broken and fly out of the rotor core due to vibration during operation of the rotating electric machine, a structure is disclosed in which an adhesive is filled in a gap between the rotor core and the permanent magnets to fix the permanent magnets (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2006-109683
The rotor of the rotating electrical machine disclosed in patent document 1 has flux shielding holes (japanese: フラックスバリア holes) for preventing short-circuiting of magnetic fluxes generated by the permanent magnets at both ends of the magnet insertion holes for inserting the permanent magnets, and when an adhesive is filled in the gap between the rotor core and the permanent magnets, the flux shielding holes are also filled with the adhesive, so that there is a problem that more adhesive is used than is necessary for fixing the permanent magnets, and the material consumption of the adhesive increases. Further, since the amount of the adhesive used increases, there is a problem that curing of the adhesive takes time and productivity deteriorates.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotor of a rotating electric machine, which can reduce material consumption of an adhesive by reducing the amount of the adhesive used to fill a gap between a rotor core and a permanent magnet for fixing the permanent magnet.
The utility model discloses rotating electrical machines's rotor is a rotating electrical machines's rotor, rotating electrical machines's rotor is assembled the permanent magnet to rotor core and is formed, and wherein, rotor core includes: a magnet insertion hole to which the inserted permanent magnet is fixed by an adhesive; an inner diameter side magnetic flux shielding hole provided at an inner diameter side end of the magnet insertion hole; an outer diameter side magnetic flux shielding hole provided at an outer diameter side end portion of the magnet insertion hole; and a columnar member disposed between the permanent magnet and at least one of the inner diameter side magnetic flux shielding hole and the outer diameter side magnetic flux shielding hole.
According to the rotor of the rotating electrical machine disclosed in the present application, since the adhesive can be prevented from being filled in the flux shielding holes by the columnar members disposed between the flux shielding holes and the permanent magnets, the amount of the adhesive used to fill the gap between the rotor core and the permanent magnets for fixing the permanent magnets can be reduced, and the material consumption of the adhesive can be reduced.
Drawings
Fig. 1 is a plan view showing a rotor of a rotating electric machine according to embodiment 1.
Fig. 2 is a partial plan view showing a part of the rotor according to embodiment 1.
Fig. 3 is a plan view showing a rotor of a rotating electric machine according to embodiment 2.
Fig. 4 is a partial plan view showing a part of a rotor according to embodiment 2.
Fig. 5 is a partial plan view showing a part of a rotor according to embodiment 3.
Fig. 6 is a partial plan view showing a part of a rotor according to embodiment 4.
Fig. 7 is a plan view showing a rotor of a rotating electric machine according to embodiment 5.
Fig. 8 is a diagram showing an example of a flowchart in the method of manufacturing a rotor according to the embodiment.
Fig. 9 is a diagram showing a flowchart in another manufacturing method of a rotor according to the embodiment.
(symbol description)
1, a rotor;
2, a rotor iron core;
3, a permanent magnet;
4a inner diameter side columnar member;
4b an outer diameter side cylindrical member;
5 inserting the magnet into the hole;
6a inner diameter side magnetic flux shielding hole;
6b outer diameter side magnetic flux shielding holes;
7, a bonding agent;
8a inner diameter side outer peripheral columnar member insertion groove;
8b outer diameter side outer peripheral cylindrical member insertion grooves;
8c inner diameter side inner peripheral cylindrical member insertion groove;
8d outer diameter side inner peripheral cylindrical member insertion groove.
Detailed Description
Hereinafter, a rotor of a rotating electric machine according to an embodiment will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals.
Fig. 1 is a plan view showing a rotor of a rotating electric machine according to embodiment 1. Fig. 2 is a partial plan view showing a part of the rotor according to embodiment 1.
The rotor 1 includes: a rotor core 2 formed by stacking rotor core pieces; a permanent magnet 3 assembled to the rotor core 2; and an inner diameter side columnar member 4a and an outer diameter side columnar member 4b as columnar members.
At least one pair of magnet insertion holes 5 constituting one pole of the rotor 1 are provided in the rotor core 2 in a V-shaped arrangement, and the magnet insertion holes 5 have a depth in the axial direction of the rotor 1 into which the permanent magnets 3 can be inserted.
The pair of magnet insertion holes 5 are formed in a V shape so that the intervals therebetween become wider on the outer peripheral side than on the inner peripheral side, an inner-diameter-side magnetic flux shielding hole 6a is provided at an end portion of the magnet insertion hole 5 on the inner diameter side in the rotor core, and an outer-diameter-side magnetic flux shielding hole 6b is provided at an end portion of the magnet insertion hole 5 on the outer diameter side in the rotor core. The permanent magnet 3 is inserted into the magnet insertion hole 5, and the thermosetting adhesive 7 is filled in the gap between the permanent magnet 3 and the magnet insertion hole 5.
The columnar members are constituted by an inner diameter side columnar member 4a and an outer diameter side columnar member 4b, the inner diameter side columnar member 4a is disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3, and the outer diameter side columnar member 4b is disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3, thereby preventing the adhesive 7 from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6 b.
According to the above configuration, the inner diameter side columnar member 4a disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3 suppresses the adhesive 7 from being filled in the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side columnar member 4b disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3 suppresses the adhesive 7 from being filled in the outer diameter side magnetic flux shielding hole 6b, so that the amount of the adhesive to be filled in the gap between the rotor core 2 and the permanent magnet 3 for fixing the permanent magnet 3 can be reduced, the material consumption of the adhesive can be reduced, the time for curing the adhesive can be shortened, and the productivity can be improved.
In the above embodiment, the columnar member is configured to be provided with both the inner diameter side columnar member 4a and the outer diameter side columnar member 4b, but the columnar member may be configured to be provided with either the inner diameter side columnar member 4a or the outer diameter side columnar member 4b, and the same effect can be obtained.
Fig. 8 is a flowchart for explaining a method of manufacturing the rotor in embodiment 1.
First, in the electromagnetic steel sheet processing step S10, the rotor core pieces constituting the rotor core 2 are punched out of the electromagnetic steel sheet as the base material, and the magnet insertion holes 5, the inner diameter side magnetic flux shielding holes 6a, and the outer diameter side magnetic flux shielding holes 6b are formed.
In the electromagnetic steel sheet laminating step S11, rotor core pieces formed of electromagnetic steel sheets are laminated to form the rotor core 2. The stacked electromagnetic steel sheets are integrated by caulking, bonding, welding, or the like.
After the rotor core pieces are integrated, in the columnar member insertion step S12, the inner diameter side columnar member 4a and the outer diameter side columnar member 4b are inserted into the magnet insertion holes 5 from the lamination direction of the rotor cores.
In the adhesive filling step S13, the magnet insertion holes 5 are filled with the adhesive 7. At this time, since the inner diameter side columnar member 4a and the outer diameter side columnar member 4b are inserted, the adhesive can be suppressed from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6 b.
In the permanent magnet inserting step S14, the permanent magnets 3 are inserted into the magnet insertion holes 5 from the lamination direction of the rotor core 2. By inserting the permanent magnet 3 into the magnet insertion hole 5, the liquid level of the adhesive filled in the magnet insertion hole 5 rises. The amount of adhesive filling is set such that the liquid level of the adhesive filling the gap between the permanent magnet 3 and the magnet insertion hole 5 is lower than the axial height of the inner diameter side columnar member 4a and the outer diameter side columnar member 4 b.
According to the above manufacturing method, the leakage of the adhesive from the magnet insertion hole 5 to the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b can be suppressed.
The above-described manufacturing method is an example of a case where both the inner diameter side columnar member 4a and the outer diameter side columnar member 4b are provided, but the same effect can be obtained by applying the manufacturing method to a rotor configured to provide either the inner diameter side columnar member 4a or the outer diameter side columnar member 4b as a columnar member.
Fig. 3 is a plan view showing a rotor of a rotating electric machine according to embodiment 2. Fig. 4 is a partial plan view showing a part of a rotor according to embodiment 2.
The rotor 1 includes: a rotor core 2 formed by stacking rotor core pieces; a permanent magnet 3 assembled to the rotor core; and an inner diameter side columnar member 4c and an outer diameter side columnar member 4d as columnar members.
At least one pair of magnet insertion holes 5 constituting one pole of the rotor 1 are arranged in the rotor core 2 in a V-shape, and the magnet insertion holes 5 have a depth in the axial direction of the rotor 1 into which the permanent magnets 3 can be inserted.
The pair of magnet insertion holes 5 are formed in a V shape so that the intervals therebetween become wider on the outer peripheral side than on the inner peripheral side, and an inner-diameter-side magnetic flux shielding hole 6a is provided at the inner-diameter-side end of the magnet insertion hole 5, and an outer-diameter-side magnetic flux shielding hole 6b is provided at the outer-diameter-side end of the magnet insertion hole 5.
An inner diameter side outer circumferential columnar member insertion groove 8a and an outer diameter side outer circumferential columnar member insertion groove 8b are provided on the outer circumferential side of the magnet insertion hole 5. The inner diameter side outer cylindrical member insertion groove 8a is disposed on the outer peripheral side between the magnet insertion hole 5 and the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side outer cylindrical member insertion groove 8b is disposed on the outer peripheral side between the magnet insertion hole 5 and the outer diameter side magnetic flux shielding hole 6 b. The permanent magnet 3 is inserted into the magnet insertion hole 5, and the thermosetting adhesive 7 is filled in the gap between the permanent magnet 3 and the magnet insertion hole 5.
The columnar members are constituted by an inner diameter side columnar member 4c and an outer diameter side columnar member 4 d. The inner diameter side columnar member 4c is inserted into the inner diameter side outer circumferential columnar member insertion groove 8a and disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3, and the outer diameter side columnar member 4d is inserted into the outer diameter side outer circumferential columnar member insertion groove 8b and disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3, thereby preventing the adhesive 7 from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6 b.
According to the above configuration, the inner diameter side columnar member 4c disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3 suppresses the adhesive 7 from being filled in the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side columnar member 4d disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3 suppresses the adhesive 7 from being filled in the outer diameter side magnetic flux shielding hole 6b, so that the amount of the adhesive used to fill the gap between the rotor core 2 and the permanent magnet 3 for fixing the permanent magnet 3 can be reduced, the material consumption of the adhesive can be reduced, the time for curing the adhesive can be shortened, and the productivity can be improved.
In the above embodiment, the columnar member is configured to be provided with both the inner diameter side columnar member 4c and the outer diameter side columnar member 4d, but the columnar member may be configured to be provided with either the inner diameter side columnar member 4c or the outer diameter side columnar member 4d, and the same effect can be obtained.
Fig. 9 is a flowchart for explaining a method of manufacturing the rotor in embodiment 2.
First, in the electromagnetic steel sheet processing step S20, the rotor core pieces constituting the rotor core 2 are punched out of the electromagnetic steel sheet as the base material, and the magnet insertion hole 5, the inner diameter side magnetic flux shielding hole 6a, the outer diameter side magnetic flux shielding hole 6b, the inner diameter side outer circumferential columnar member insertion groove 8a, and the outer diameter side outer circumferential columnar member insertion groove 8b are formed.
In the electromagnetic steel sheet laminating step S21, rotor core pieces formed of electromagnetic steel sheets are laminated to form the rotor core 2. The stacked electromagnetic steel sheets are integrated by caulking, bonding, welding, or the like.
In the permanent magnet and columnar member joining step S22, the inner diameter side columnar member 4c and the outer diameter side columnar member 4d are fixed to the permanent magnet 3 by a fixing method such as fitting, bonding, welding, or the like, thereby forming a joined body.
In the combined body inserting step S23, the combined body of the permanent magnet 3 and the inner diameter side columnar member 4c and the outer diameter side columnar member 4d are inserted into the magnet insertion hole 5 from the lamination direction of the rotor core 2.
The inner diameter side columnar member 4c is inserted from the lamination direction of the rotor core 2 and fitted into the inner diameter side outer peripheral columnar member insertion groove 8a, thereby being positioned on a plane perpendicular to the lamination direction. The outer diameter side columnar member 4d is positioned by being inserted from the lamination direction of the rotor core 2 and fitted into the outer diameter side outer peripheral columnar member insertion groove 8 b.
In the adhesive filling step S24, the magnet insertion holes 5 are filled with the adhesive 7. At this time, since the inner diameter side columnar member 4c and the outer diameter side columnar member 4d are inserted into the magnet insertion hole 5, the inner diameter side outer circumferential columnar member insertion groove 8a, and the outer diameter side outer circumferential columnar member insertion groove 8b, the flow of the adhesive into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b can be suppressed.
The amount of adhesive filled is such that the liquid level of the adhesive filled in the gap between the permanent magnet 3 and the magnet insertion hole 5 is lower than the axial height of the inner diameter side columnar member 4c and the outer diameter side columnar member 4 d.
According to the above manufacturing method, the leakage of the adhesive from the magnet insertion hole 5 to the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6b can be suppressed.
The above-described manufacturing method is an example of a case where both the inner diameter side columnar member 4c and the outer diameter side columnar member 4d are provided, but the same effect can be obtained by applying the manufacturing method to a rotor configured to provide either the inner diameter side columnar member 4c or the outer diameter side columnar member 4d as a columnar member.
Fig. 5 is a partial plan view showing a part of a rotor of a rotating electric machine according to embodiment 3.
At least one pair of magnet insertion holes 5 constituting one pole of the rotor 1 are provided in the rotor core 2 in a V-shaped arrangement, and the magnet insertion holes 5 have a depth in the axial direction of the rotor 1 into which the permanent magnets 3 can be inserted.
The pair of magnet insertion holes 5 are formed in a V shape so that the intervals therebetween become wider on the outer peripheral side than on the inner peripheral side, and an inner-diameter-side magnetic flux shielding hole 6a is provided at the inner-diameter-side end of the magnet insertion hole 5, and an outer-diameter-side magnetic flux shielding hole 6b is provided at the outer-diameter-side end of the magnet insertion hole 5.
An inner diameter side inner peripheral cylindrical member insertion groove 8c and an outer diameter side inner peripheral cylindrical member insertion groove 8d are provided on the inner peripheral side of the magnet insertion hole 5. The inner diameter side inner cylindrical member insertion groove 8c is disposed on the inner peripheral side between the magnet insertion hole 5 and the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side inner cylindrical member insertion groove 8d is disposed on the inner peripheral side between the magnet insertion hole 5 and the outer diameter side magnetic flux shielding hole 6 b. The permanent magnet 3 is inserted into the magnet insertion hole 5, and the thermosetting adhesive 7 is filled in the gap between the permanent magnet 3 and the magnet insertion hole 5.
The columnar members are constituted by an inner diameter side columnar member 4e and an outer diameter side columnar member 4 f. The inner diameter side columnar member 4e is inserted into the inner diameter side inner peripheral columnar member insertion groove 8c and disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3, and the outer diameter side columnar member 4f is inserted into the outer diameter side inner peripheral columnar member insertion groove 8d and disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3, thereby preventing the adhesive 7 from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6 b.
According to the above configuration, since the inner diameter side column-shaped member 4e disposed between the inner diameter side flux shielding hole 6a and the permanent magnet 3 suppresses the filling of the inner diameter side flux shielding hole 6a with the adhesive, and the outer diameter side column-shaped member 4f disposed between the outer diameter side flux shielding hole 6b and the permanent magnet 3 suppresses the filling of the outer diameter side flux shielding hole 6b with the adhesive, the amount of the adhesive used to fill the gap between the rotor core 2 and the permanent magnet 3 for fixing the permanent magnet 3 can be reduced, the material consumption of the adhesive can be reduced, the time for curing the adhesive can be shortened, and the productivity can be improved.
In the above embodiment, the columnar member is configured to be provided with both the inner diameter side columnar member 4e and the outer diameter side columnar member 4f, but the columnar member may be configured to be provided with either the inner diameter side columnar member 4e or the outer diameter side columnar member 4f, and the same effect can be obtained.
As in embodiment 2, in embodiment 3, the rotor can be manufactured by the manufacturing method shown in the flowchart of fig. 9.
Embodiment 4
Fig. 6 is a partial plan view showing a part of a rotor of a rotating electric machine according to embodiment 4.
The rotor core 2 is provided such that at least a pair of magnet insertion holes 5 constituting one pole of the rotor 1 are arranged in a V shape, and the magnet insertion holes 5 have a depth in the axial direction of the rotor 1 into which the permanent magnets 3 can be inserted.
The pair of magnet insertion holes 5 are formed in a V shape so that the intervals therebetween become wider on the outer peripheral side than on the inner peripheral side, and an inner-diameter-side magnetic flux shielding hole 6a is provided at the inner-diameter-side end of the magnet insertion hole 5, and an outer-diameter-side magnetic flux shielding hole 6b is provided at the outer-diameter-side end of the magnet insertion hole 5.
An inner diameter side outer cylindrical member insertion groove 8a and an outer diameter side outer cylindrical member insertion groove 8b are provided on the outer peripheral side of the magnet insertion hole 5, and an inner diameter side inner cylindrical member insertion groove 8c and an outer diameter side inner cylindrical member insertion groove 8d are provided on the inner peripheral side of the magnet insertion hole 5. The inner diameter side outer cylindrical member insertion groove 8a is disposed on the outer peripheral side between the magnet insertion hole 5 and the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side outer cylindrical member insertion groove 8b is disposed on the outer peripheral side between the magnet insertion hole 5 and the outer diameter side magnetic flux shielding hole 6 b. Further, the inner diameter side inner peripheral cylindrical member insertion groove 8c is disposed on the inner peripheral side between the magnet insertion hole 5 and the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side inner peripheral cylindrical member insertion groove 8d is disposed on the inner peripheral side between the magnet insertion hole 5 and the outer diameter side magnetic flux shielding hole 6 b. The permanent magnet 3 is inserted into the magnet insertion hole 5, and the thermosetting adhesive 7 is filled in the gap between the permanent magnet 3 and the magnet insertion hole 5.
The columnar members are constituted by an inner diameter side columnar member 4g and an outer diameter side columnar member 4 h. The inner diameter side columnar member 4g is inserted into the inner diameter side outer circumferential columnar member insertion groove 8a and the inner diameter side inner circumferential columnar member insertion groove 8c and is disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3, and the outer diameter side columnar member 4h is inserted into the outer diameter side outer circumferential columnar member insertion groove 8d and the outer diameter side inner circumferential columnar member insertion groove 8d and is disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3, whereby the adhesive 7 is prevented from flowing into the inner diameter side magnetic flux shielding hole 6a and the outer diameter side magnetic flux shielding hole 6 b.
According to the above configuration, the inner diameter side columnar member 4g disposed between the inner diameter side magnetic flux shielding hole 6a and the permanent magnet 3 suppresses the adhesive from being filled in the inner diameter side magnetic flux shielding hole 6a, and the outer diameter side columnar member 4h disposed between the outer diameter side magnetic flux shielding hole 6b and the permanent magnet 3 suppresses the adhesive from being filled in the outer diameter side magnetic flux shielding hole 6b, so that the amount of the adhesive to be filled in the gap between the rotor core 2 and the permanent magnet 3 for fixing the permanent magnet 3 can be reduced, the material consumption of the adhesive can be reduced, the time for curing the adhesive can be shortened, and the productivity can be improved.
In the above embodiment, the columnar member is configured to be provided with both the inner diameter side columnar member 4g and the outer diameter side columnar member 4h, but the columnar member may be configured to be provided with either the inner diameter side columnar member 4g or the outer diameter side columnar member 4h, and the same effect can be obtained.
In embodiment 4, as in embodiments 2 and 3, the rotor can be manufactured by the manufacturing method shown in the flowchart of fig. 9.
Fig. 7 is a plan view showing a rotor of a rotating electric machine according to embodiment 5.
In each of the above embodiments, the columnar member is configured to be a prismatic columnar member, and functions as a spacer for dividing the space between the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b and the region of the magnet insertion hole 5, but as illustrated in fig. 7, the inner diameter side columnar member 4i and the outer diameter side columnar member 4j, which are columnar members having a longitudinal direction in the axial direction, may be arranged substantially in the region of the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b and provided in the region with the magnet insertion hole 5.
In the case of such a configuration, although the columnar inner diameter side columnar member 4i and the columnar outer diameter side member 4j do not function as spacers for completely dividing the space between the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b and the region of the permanent magnet 3, when the adhesive 7 is filled into the magnet insertion hole 5 in, for example, the adhesive filling step S24 in fig. 9, the columnar inner diameter side columnar member 4i and the columnar outer diameter side member 4j are arranged, and the adhesive is suppressed from being filled into the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b to a certain extent. Therefore, although the specific illustration of the region where the adhesive 7 is disposed is omitted, the adhesive is suppressed from being filled in the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b, and as a result, a state is obtained in which the amount of the adhesive (or the filling rate per unit volume) filled in the inner diameter side magnetic flux shielding hole 6a or the outer diameter side magnetic flux shielding hole 6b is smaller than the amount of the adhesive 7 (or the filling rate per unit volume) filled in the magnet insertion hole 5.
That is, in the case where both sides of the inner diameter side columnar member 4i and the outer diameter side columnar member 4j are compared, a state is obtained in which the amount of the adhesive (or the filling rate per unit volume) is smaller in the region on the side away from the permanent magnet 3 than in the region on the side closer to the permanent magnet 3, or a state is obtained in which the adhesive is not filled in the region on the side away from the permanent magnet 3.
In the above embodiment, the columnar member is configured to be provided with both the inner diameter side columnar member 4i and the outer diameter side columnar member 4j, but the columnar member may be configured to be provided with either the inner diameter side columnar member 4i or the outer diameter side columnar member 4j, and the same effect can be obtained.
In embodiment 5, similarly to the above embodiments, the rotor can be manufactured by appropriately selecting the manufacturing method shown in the flowchart of fig. 9.
While various exemplary embodiments and examples have been described in the present application, various features, modes, and functions described in one or more embodiments are not limited to the application to specific embodiments, and can be applied to the embodiments alone or in various combinations.
Therefore, numerous modifications not illustrated are contemplated within the technical scope disclosed in the present specification. For example, the case where at least one component is modified, added, or omitted is included, and the case where at least one component is extracted and combined with the components of the other embodiments is also included.
Claims (8)
1. A rotor of a rotating electrical machine, which is formed by assembling permanent magnets to a rotor core,
the rotor core includes:
a magnet insertion hole into which the permanent magnet is inserted and to which the permanent magnet is fixed by an adhesive;
an inner diameter side magnetic flux shielding hole provided at an end of the magnet insertion hole on an inner diameter side of the rotor core;
an outer diameter side magnetic flux shielding hole provided at an end of the magnet insertion hole on an outer diameter side of the rotor core; and
a columnar member disposed between the permanent magnet and at least one of the inner diameter side magnetic flux shielding hole and the outer diameter side magnetic flux shielding hole.
2. The rotor of a rotating electric machine according to claim 1,
a columnar member insertion groove is provided on an outer peripheral side of the magnet insertion hole, the columnar member insertion groove being disposed on an outer peripheral side between the magnet insertion hole and the inner diameter side magnetic flux shielding hole, and the columnar member being inserted, the columnar member being disposed between the inner diameter side magnetic flux shielding hole and the permanent magnet.
3. The rotor of a rotating electric machine according to claim 1,
a columnar member insertion groove is provided on an inner peripheral side of the magnet insertion hole, the columnar member insertion groove being disposed on an inner peripheral side between the magnet insertion hole and the inner diameter side magnetic flux shielding hole, and the columnar member being inserted, the columnar member being disposed between the inner diameter side magnetic flux shielding hole and the permanent magnet.
4. The rotor of a rotating electric machine according to claim 1,
a columnar member insertion groove is provided on an outer peripheral side of the magnet insertion hole, the columnar member insertion groove being disposed on an outer peripheral side between the magnet insertion hole and the outer diameter side magnetic flux shielding hole, and the columnar member being inserted, the columnar member being disposed between the outer diameter side magnetic flux shielding hole and the permanent magnet.
5. The rotor of a rotating electric machine according to claim 1,
a columnar member insertion groove is provided on an inner peripheral side of the magnet insertion hole, the columnar member insertion groove being disposed on an inner peripheral side between the magnet insertion hole and the outer diameter side magnetic flux shielding hole, and the columnar member being inserted, the columnar member being disposed between the outer diameter side magnetic flux shielding hole and the permanent magnet.
6. The rotor of a rotating electric machine according to claim 1,
the inner diameter side magnetic flux shielding hole or the outer diameter side magnetic flux shielding hole in which the columnar member is disposed is filled with a smaller amount of adhesive than the amount of adhesive filled in the magnet insertion hole.
7. A method of manufacturing a rotor of a rotating electrical machine, comprising:
an electromagnetic steel sheet processing step of punching a rotor core piece constituting a rotor core from an electromagnetic steel sheet as a base material, and forming a magnet insertion hole, an inner diameter side magnetic flux shielding hole, and an outer diameter side magnetic flux shielding hole;
an electromagnetic steel sheet laminating step of laminating rotor core pieces formed of electromagnetic steel sheets to form a rotor core;
a columnar member insertion step of inserting an inner diameter side columnar member and an outer diameter side columnar member into the magnet insertion hole from a lamination direction of the rotor core after integrating the rotor core pieces;
an adhesive filling step of filling the magnet insertion hole with an adhesive; and
and a permanent magnet insertion step of inserting a permanent magnet into the magnet insertion hole from a lamination direction of the rotor core.
8. A method of manufacturing a rotor of a rotating electrical machine, comprising:
an electromagnetic steel plate processing step of punching a rotor core piece constituting a rotor core from an electromagnetic steel plate as a base material, and forming a magnet insertion hole, an inner diameter side magnetic flux shielding hole, an outer diameter side magnetic flux shielding hole, an inner diameter side outer cylindrical member insertion groove, and an outer diameter side outer cylindrical member insertion groove;
an electromagnetic steel sheet laminating step of laminating rotor core pieces formed of electromagnetic steel sheets to form a rotor core;
a permanent magnet and columnar member joining step of fixing the inner diameter side columnar member and the outer diameter side columnar member to the permanent magnet to form a joined body;
a combined body inserting step of inserting a combined body of the inner diameter side columnar member, the outer diameter side columnar member, and the permanent magnet into the magnet insertion hole from a lamination direction of the rotor core; and
and an adhesive filling step of filling the magnet insertion holes with an adhesive.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-076475 | 2020-04-23 | ||
| JP2020076475A JP6983274B2 (en) | 2020-04-23 | 2020-04-23 | Rotor of rotary electric machine and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113555985A true CN113555985A (en) | 2021-10-26 |
| CN113555985B CN113555985B (en) | 2024-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110395642.6A Active CN113555985B (en) | 2020-04-23 | 2021-04-13 | Rotor of rotary electric machine and method for manufacturing same |
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| JP (1) | JP6983274B2 (en) |
| CN (1) | CN113555985B (en) |
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| JP2009296696A (en) * | 2008-06-02 | 2009-12-17 | Toyota Motor Corp | Rotor |
| JP2012147673A (en) * | 2011-10-13 | 2012-08-02 | Mitsui High Tec Inc | Resin seal apparatus of permanent magnets |
| US20130113328A1 (en) * | 2010-07-23 | 2013-05-09 | Tomonari Kogure | Rotor and ipm motor |
| JP2014197970A (en) * | 2013-03-29 | 2014-10-16 | 株式会社小松製作所 | Motor |
| JP2014212589A (en) * | 2013-04-17 | 2014-11-13 | 株式会社豊田自動織機 | Dynamo-electric machine |
| CN105305679A (en) * | 2014-06-20 | 2016-02-03 | 日本电产株式会社 | Motor |
| CN108886278A (en) * | 2016-03-31 | 2018-11-23 | 爱信艾达株式会社 | Rotor for dynamo-electric machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5556400B2 (en) * | 2010-06-09 | 2014-07-23 | 富士電機株式会社 | Rotor core member and permanent magnet fixing method |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009296696A (en) * | 2008-06-02 | 2009-12-17 | Toyota Motor Corp | Rotor |
| US20130113328A1 (en) * | 2010-07-23 | 2013-05-09 | Tomonari Kogure | Rotor and ipm motor |
| JP2012147673A (en) * | 2011-10-13 | 2012-08-02 | Mitsui High Tec Inc | Resin seal apparatus of permanent magnets |
| JP2014197970A (en) * | 2013-03-29 | 2014-10-16 | 株式会社小松製作所 | Motor |
| JP2014212589A (en) * | 2013-04-17 | 2014-11-13 | 株式会社豊田自動織機 | Dynamo-electric machine |
| CN105305679A (en) * | 2014-06-20 | 2016-02-03 | 日本电产株式会社 | Motor |
| CN108886278A (en) * | 2016-03-31 | 2018-11-23 | 爱信艾达株式会社 | Rotor for dynamo-electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021175249A (en) | 2021-11-01 |
| JP6983274B2 (en) | 2021-12-17 |
| CN113555985B (en) | 2024-03-05 |
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