WO2022029842A1 - 回転電機およびその製造方法 - Google Patents
回転電機およびその製造方法 Download PDFInfo
- Publication number
- WO2022029842A1 WO2022029842A1 PCT/JP2020/029678 JP2020029678W WO2022029842A1 WO 2022029842 A1 WO2022029842 A1 WO 2022029842A1 JP 2020029678 W JP2020029678 W JP 2020029678W WO 2022029842 A1 WO2022029842 A1 WO 2022029842A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- rotor
- press
- holder
- electric machine
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 210000000078 claw Anatomy 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 9
- 229910000576 Laminated steel Inorganic materials 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010030 laminating Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—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
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
Definitions
- This application relates to a rotary electric machine and a method for manufacturing the same.
- Patent Document 1 discloses that a magnet holder is preliminarily insert-molded into a rotor made of a laminated steel plate, and a magnet is press-fitted and fixed between the magnet holders from the direction of the rotation axis.
- Patent Document 2 discloses a magnet holder molded from a resin and fixed to a rotor, and a magnet is press-fitted and fixed to a magnet accommodating portion formed on the outer peripheral surface of the magnet holder and the rotor from the direction of the rotation axis. Has been done.
- Patent Document 1 in which the magnet holder is pre-molded into the rotor requires a complicated and expensive mold for insert molding, which increases capital investment and inevitably increases the product cost.
- Patent Document 2 in which the integrated magnet holder is fixed to the rotor and the magnet is press-fitted and fixed to the magnet accommodating portion formed by the magnet holder and the outer peripheral surface of the rotor has a rotor mounting error and a magnet holder. Since the molding error and the assembly error such as the deformation of the magnet holder due to the assembly are added, there is a problem that the variation in the arrangement accuracy of the magnet becomes large.
- the present application has been made to solve the above-mentioned problems, and an object thereof is to provide a rotary electric machine which does not require a mold for insert molding, has good assembly accuracy, and has low torque ripple and cogging torque. And.
- the rotary electric machine disclosed in the present application includes a rotor fixed to a rotating shaft, a plurality of magnets arranged on the outer periphery of the rotor, and a holder for fixing a magnet arranged between the plurality of magnets.
- the rotor is formed with a positioning portion for positioning the magnet and a groove portion for press-fitting and fixing the holder, and the holder is formed with a press-fitting portion for press-fitting into the groove portion and a pressing portion for fixing the magnet. Since the press-fitting portion is press-fitted into the groove portion, the pressing portion presses and fixes the end portion of the magnet positioned by the positioning portion.
- FIG. 5 is a perspective view of a state in which a rotor, a magnet, and a magnet holder of the rotary electric machine according to the first embodiment are assembled. It is a side view of the state which the rotor of the rotary electric machine which concerns on Embodiment 1 and a magnet and a magnet holder are assembled. It is a perspective view of the rotor of the rotary electric machine which concerns on Embodiment 1.
- FIG. It is a perspective view of the magnet of the rotary electric machine which concerns on Embodiment 1.
- FIG. 2 is a sectional view taken along the line AA of FIG. 2 according to the first embodiment. It is a partially enlarged view of the BB cross section of FIG. 3 which concerns on Embodiment 1. FIG. It is a partially enlarged view of the CC cross section of FIG. 3 which concerns on Embodiment 1. FIG. It is a perspective view of the rotor unit which concerns on Embodiment 1.
- FIG. FIG. 5 is a perspective view of a state in which a rotor, a magnet, and a magnet holder of the rotary electric machine according to the second embodiment are assembled.
- FIG. 12 is a cross-sectional view taken along the line DD of FIG. 12 according to the second embodiment. It is a perspective view before press-fitting of the magnet holder of the rotary electric machine which concerns on Embodiment 2.
- FIG. 12 is a perspective view after press-fitting of the magnet holder of the rotary electric machine which concerns on Embodiment 2.
- FIG. 3 It is an assembly perspective view of the rotor and the rotor shaft which concerns on Embodiment 3.
- FIG. It is a perspective view of the magnet holder which concerns on Embodiment 3.
- FIG. It is a top view of the magnet holder which concerns on Embodiment 3.
- FIG. It is a top view of the rotor which concerns on Embodiment 3.
- FIG. It is a perspective view before press-fitting of the magnet holder which concerns on Embodiment 3.
- FIG. It is a perspective view of the rotor unit which concerns on Embodiment 3.
- the present application is not limited to the following description, and can be appropriately changed as long as it does not deviate from the gist of the present application.
- the scale of each member may differ from the actual scale for the sake of easy understanding, and the illustration of the configuration not related to the features of the present application is omitted.
- FIGS. 1 to 11 The rotary electric machine according to the first embodiment of the present application will be described with reference to FIGS. 1 to 11.
- FIGS. 1 to 11 an example in which the rotary electric machine is applied to the electric power steering mounted on the vehicle is shown.
- a control device is required in addition to the rotary electric machine main body, but control is required.
- the illustration of the device is omitted.
- FIG. 1 is a cross-sectional view for explaining the configuration of a rotary electric machine.
- the frame 2 which is the housing of the rotary electric machine 1 has a substantially cylindrical shape having an opening on the rear side (upper side of the drawing), and is made of an inexpensive and lightweight aluminum alloy.
- the stator 3 is formed by laminating electromagnetic steel sheets and is fixed to the frame 2.
- a stator winding 5 is wound around the stator 3 via an insulator 4, which is an insulator, and a current from a control device (not shown) provided on the rear side is supplied to the stator winding 5.
- Terminal 6 is installed.
- a bearing 9 is fixed to the frame 2 via a bearing 7 on the front side and a bearing holder 8 from the rear side.
- a rotor 11 formed by laminating electromagnetic steel sheets is fixed to the rotor shaft 10, and a plurality of magnets 12 are fixed to the outer periphery of the rotor 11 by a magnet holder 13, and a non-magnetic protective tube 14 is used. It is covered and constitutes the rotor unit 15.
- the rotor shaft 10 is rotatably supported by bearings 7 and 9, and the rotor unit 15 is arranged so as to be spaced apart from the stator 3.
- a joint 16 for assembling with the vehicle side is installed at the end of the rotor shaft 10 on the front side (lower side of the drawing), and the rotating state of the rotor 11 is provided at the omitted portion on the rear side of the rotor shaft 10.
- a rotation angle detection sensor is installed to detect.
- the heat sink 17 on which the control device (not shown) is installed is fixed to the rear opening end of the frame 2.
- the control device includes a power conversion circuit and a control circuit having a power semiconductor that converts a direct current from the outside, and a required current is supplied to the stator winding 5 via the terminal 6. As a result, a rotational force is generated in the rotor 11, and the rotor unit 15 and the joint 16 are rotated.
- FIGS. 2 and 3 show a perspective view and a side view of a state in which the rotor 11, the magnet 12, and the magnet holder 13 are assembled.
- a plurality of magnets 12 are arranged on the outer periphery of the rotor 11 at uniform intervals, and the same number of magnet holders 13 for fixing and holding the magnets 12 are arranged between the magnets 12.
- FIG. 4 shows a perspective view of the rotor 11.
- the rotor 11 is made of a laminated steel plate in which a plurality of electromagnetic steel plates are laminated in the vertical direction, and in the present embodiment, the outer shape has a substantially regular octagonal prism shape, has eight outer peripheral surfaces 11a, and has a rotor shaft 10 in the center.
- a through hole 11b for inserting is provided.
- positioning bosses 11c and 11d that define the position of the magnet 12 in the circumferential direction and positioning bosses 11e and 11f that define the position of the magnet 12 in the axial direction are formed.
- a groove portion 11g extending in the axial direction is formed between the magnets 12.
- FIG. 5 shows a perspective view of the magnet 12.
- the magnet 12 is, for example, an Nd-Fe-B-based sintered magnet, the surface of which is coated for rust prevention, one cylindrical surface 12a and a flat surface 12b facing the surface, and two side surfaces 12c, 12d and an upper surface 12e.
- the magnet holder 13 is a highly rigid and elastic epoxy-based, PPS (polyphenylene sulfide) -based, or PBT (polybutylene terephthalate) -based resin molded product.
- the cross section has a substantially T-shape, and has a press-fitting portion 13a, and a first contact portion 13b and a second contact portion 13c that press the cylindrical surface 12a of the magnet 12 in the radial direction.
- the magnet 12 has a third contact portion 13d that presses the side surface 12c of the magnet 12 in the circumferential direction and a non-contact portion 13e that does not contact the side surface 12d of the magnet 12, and further has a fourth contact that presses the upper surface 12e of the magnet 12 in the axial direction. It has a shape having a portion 13f.
- FIG. 7 shows a perspective view before fixing with the magnet holder 13.
- Eight magnets 12 are arranged with respect to the rotor 11, the eight magnet holders 13 are simultaneously moved in the radial direction (arrow direction), and the press-fitting portion 13a is press-fitted into the groove portion 11g of the rotor 11. As a result, it is assembled in the state shown in FIGS. 2 and 3.
- FIG. 8 partially enlarged views of the BB cross section and the CC cross section of FIG. 3 are shown in FIGS. 9 and 10.
- the upper surface 12e of the magnet 12 is pressed by the fourth contact portion 13f of the magnet holder 13, and the lower surface 12f and the positioning bosses 11e and 11f of the rotor 11 abut and are positioned and fixed.
- the cylindrical surface 12a of the magnet 12 is pressed by the first contact portion 13b and the second contact portion 13c of the magnet holder 13, and the flat surface 12b and the outer peripheral surface 11a of the rotor 11 come into contact with each other for positioning and fixing. Will be done.
- One side surface 12c of the magnet 12 is pressed by the third contact portion 13d of the magnet holder 13, and the other side surface 12d and the positioning bosses 11c and 11d of the rotor 11 abut and are positioned and fixed.
- the non-contact portion 13e of the magnet holder 13 is separated from the side surface 12d of the magnet 12 and is not pressed.
- the magnet holder 13 is designed based on the press-fitting allowance, press-fitting length, material, etc. so that the magnet holder 13 does not come off from the rotor 11 after press-fitting, and the necessary holding force is secured. Further, in the present embodiment, the magnet holder 13 is a resin molded product, but it may be a cast product of a non-magnetic metal such as aluminum or stainless steel, a machined product, a pressed product, or the like.
- the magnet holder 13 Since it is configured as described above, the magnet holder 13 does not require a complicated and expensive mold, and can be provided in a small size and at low cost. Further, since the individual magnet holder 13 is press-fitted and fixed to the rotor 11 from the radial direction of the rotor shaft 10, simple assembly is possible without press-fitting the magnet 12 against the rotor 11 and the magnet holder 13. ..
- the magnet 12 does not need to move in the axial direction and the circumferential direction at the time of assembly, it can be assembled even more easily. Further, this does not cause the coating of the magnet 12 to peel off to generate rust, or the magnet holder 13 to be scraped to prevent deterioration of the magnet placement accuracy and holding power.
- the magnet 12 is not affected by the component accuracy of the magnet holder 13 and the assembly accuracy of the magnet holder 13 and the rotor 11, and is fixed with high accuracy only by the component accuracy of the rotor 11, so that torque ripple and cogging torque are not affected. It is possible to provide a rotary electric machine with good characteristics by suppressing the occurrence of.
- the magnet 12 is surely pressed by the first contact portion 13b and the second contact portion 13c of the magnet holder 13, the flat surface 12b is surely pressed against the outer peripheral surface 11a of the rotor 11 without play.
- the rotor 11 has a substantially regular octagonal prism shape.
- the shape may be used, and the rotor 11 may have another shape such as a cylindrical shape.
- FIG. 11 shows a perspective view of the rotor unit 15.
- a protective tube 14 made of a non-magnetic material such as stainless steel or aluminum formed by deep drawing is exteriorized on the outside of the magnet holder 13 fixed as described above.
- the outer circumference of the magnet holder 13 is slightly larger than the outer circumference of the magnet 12, and the protective tube 14 is fixed to the magnet holder 13 with a slight press-fitting, and then the end face is bent to bend the magnet holder 13 or the rotor. It is contact-fixed to the upper and lower surfaces of 11.
- the rotor unit 15 can be configured without the protective tube 14, but it is attached to prevent the rotor unit 15 from locking when the magnet 12 breaks or comes off. Further, the magnet holder 13 and the magnet 12 are more firmly fixed and held by the protective tube 14. Finally, the rotor unit 15 is completed by press-fitting the rotor shaft 10 into the through hole 11b of the rotor 11.
- the rotor shaft 10 is press-fitted and fixed after fixing the magnet to the rotor 11, but after the rotor 11 is press-fitted and fixed to the rotor shaft 10, the magnet 12 is fixed by the above-mentioned procedure. Needless to say, it's good.
- the rotary electric machine of the first embodiment since it can be configured with a small holder, it does not require a complicated and expensive mold for insert molding, and can be configured with an inexpensive holder. Further, the position of the magnet is not affected by the accuracy of the holder and the assembly accuracy of the holder and the rotor, and is determined with high accuracy only by the accuracy of the rotor, so that good characteristics with small torque ripple and cogging torque can be obtained. Further, since the individual holders are fixed to the rotor from the radial direction of the rotating shaft, the magnets do not need to be press-fitted and can be easily assembled. In addition, since the magnet is not scraped during assembly, there is an effect that a highly reliable rotary electric machine can be obtained without rusting and deterioration of accuracy.
- Embodiment 2 Next, the configuration of the rotor unit 15 of the second embodiment will be described in detail with reference to FIGS. 12 to 16.
- a perspective view and a side view of the state in which the rotor 11, the magnet 12, and the magnet holder 13 of the second embodiment are assembled are shown in FIGS. 12 and 13, respectively. Further, a perspective view of the rotor 11 is shown in FIG. 14, and a perspective view of the magnet holder 13 is shown in FIG.
- the magnet 12 is the same as that of the first embodiment. The same configuration and operation as in the first embodiment will be omitted.
- the magnet holder 13 has an upper and lower surface and four claw portions 13g between them.
- the press-fitting portion 13a is divided into three places, and the third contact part 13d and the non-contact part 13e are also divided into three places.
- the root of the claw portion 13g is connected to the main body by a thin bending portion 13h, and a convex portion 13i higher than the surrounding back surface is formed near the center of the bending portion 13h. ing.
- a recess of a hole 13j and a long hole 13k is formed in the back surface portion.
- FIG. 16 is a cross section taken along the line DD of FIG. 12, and the left side from the center shows only the rotor 11 to which the magnet holder 13 is not attached so that the structure of the engaging portion 11h can be easily understood. Since the rotor 11 is formed by laminating electromagnetic steel sheets vertically, it is possible to form such a complicated shape without difficulty.
- the positioning, fixing configuration, method, and operation of the magnet 12 are the same as those in the first embodiment, and the BB cross section and CC cross section of FIG. 13 are also the same as those of FIGS. 9 and 10. be.
- the claw portion 13g of the magnet holder 13 is caught by the engaging portion 11h of the rotor 11, so that the centrifugal force generated in the radial direction during rotation is resisted.
- the holding power is even higher.
- the axial position of the magnet 12 is defined by the positioning bosses 11e and 11f of the rotor 11, but in the present embodiment, the axial position of the magnet 12 is defined as the engaging portion 11h of the axial end portion of the magnet 12. Since positioning is also performed by engaging the claw portion 13g at the axial end, the lower surface of the rotor 11 and the lower surface 12f of the magnet are assembled so as to be equal to each other. As in the first embodiment, the axial positioning may be performed by the positioning bosses 11e and 11f.
- FIG. 17 shows the state before the press-fitting of the magnet holder 13, and FIG. 18 shows the state after the press-fitting.
- a rotor 11 and eight magnets 12 are installed on a fixing jig 100, magnet holders 13 are placed on eight movable jigs 101, and holes 13j and elongated holes 13k on the back surface (FIG. 17). It is installed based on (shown on 15B).
- the movable jigs 101 at eight locations move in the radial direction at the same time, and the press-fitting portion 13a of the magnet holder 13 is press-fitted into the groove portion 11g of the rotor 11.
- the claw portion 13g of the magnet holder 13 comes into contact with the rotor 11 and moves while warping upward or downward.
- the base of the claw portion 13g of the magnet holder 13 has a thin flexible portion 13h and a convex portion 13i higher than the surrounding back surface, the claw portion 13g flexes in the radial direction and smoothly engages with the rotor 11. It gets caught in 11h.
- the magnet holder 13 is released from the movable jig 101, the deflection of the claw portion 13g is released, and the magnet holder 13 is fixed to the engaging portion 11h of the rotor 11 without play.
- the magnet holder 13 can be configured to prevent it from coming off in the radial direction by a simple operation of inserting the magnet holder 13 from the radial direction, without providing a separate part or a separate process. , Allows for stronger radial retention.
- the retaining mechanism is provided by the claw portion 13g, but it goes without saying that the retaining mechanism may be provided by another process such as adhesion, caulking, screw fixing, and pin fixing.
- the configuration and assembly method of the rotor unit 15 are the same as those in the first embodiment.
- Embodiment 3 the magnet mounting structure of the second embodiment applied to the step skew type rotor unit 15 will be described.
- the two rotors 11 are displaced by a predetermined angle (several degrees) in the circumferential direction, and the two rotors are stacked in two stages in the axial direction and press-fitted and fixed to the rotor shaft 10.
- 12 is fixed by the magnet holder 13.
- FIG. 20 A perspective view of the magnet holder is shown in FIG. 20 (FIG. 20A is a front view and FIG. 20B is a rear view). Similar to the rotor 11, the two magnet holders of the second embodiment are displaced by a predetermined angle in the circumferential direction to form an overlapping shape in the axial direction, and are integrally molded.
- a top view of the magnet holder 13 and a top view (partially enlarged view) of the rotor 11 are shown in FIGS. 21 and 22, respectively.
- the press-fitting portion 13a and the claw portion 13g of the magnet holder 13 are configured to be parallel to each other on the upper side and the lower side of the shape overlapped in the axial direction, and the groove portion 11g of the rotor 11 and the groove of the engaging portion 11h are also axially overlapped. It is configured to be parallel on the upper side and the lower side of the overlap.
- the magnet holder 13 can be smoothly press-fitted into the rotor 11 from the radial direction.
- the assembly method is the same as in the first and second embodiments, as shown in FIG. 23, the magnet holder 13 is simultaneously moved in the radial direction with all the magnets 12 set with respect to the rotor and press-fitted. It is completed by.
- the protective tube 14 is slightly press-fitted into the magnet holder 13 as in the first embodiment, and then the end face is bent and contact-fixed to the upper and lower surfaces of the magnet holder 13 or the rotor 11. ,
- the rotor unit 15 is completed. Further, in the present embodiment, the two rotors 11 are displaced by a predetermined angle (several degrees) in the circumferential direction, and the one stacked in the axial direction is press-fitted and fixed to the rotor shaft 10, but the rotor 11 is driven in the circumferential direction.
- those displaced by a predetermined angle may be integrally manufactured, and the magnet 12 may be fixed and fixed to the rotor shaft 10 in the same manner as in the first and second embodiments. Since the rotor 11 is formed by laminating electromagnetic steel sheets vertically, it is possible to form such a complicated shape without difficulty.
- the magnet holder 13 is assembled by one press-fitting operation from the radial direction without increasing the number of the rotor 11 and the magnet holder 13. It is possible to provide a rotary electric machine that is inexpensive, easy to assemble, and has high accuracy. Further, the effects described in the first and second embodiments can be achieved.
- Rotor machine 1: Rotor machine, 2: Frame, 3: Stator, 4: Insulator, 5: Stator winding, 6: Terminal, 7: Bearing, 8: Bearing holder, 9: Bearing, 10: Rotor shaft, 11: Rotor, 11a: outer peripheral surface, 11b: through hole, 11c, 11d: positioning boss, 11e, 11f: positioning boss, 11g: groove, 11h: engaging part, 12: magnet, 13: magnet holder, 13a: press-fitting part , 13b: 1st contact part, 13c: 2nd contact part, 13d: 3rd contact part, 13e: non-contact part, 13f: 4th contact part, 13g: claw part, 13h: deflection part, 13i: convex part, 13j: hole, 13k: slotted hole, 14: protective tube, 15: rotor unit, 16: joint, 17: heat sink, 100: fixing jig, 101: movable jig
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
以下、本願に係る回転電機の好適な実施の形態について、図面を参照して説明する。なお、同一内容および相当部については同一符号を配し、その詳しい説明は省略する。以降の実施の形態も同様に、同一符号を付した構成について重複した説明は省略する。
本実施の形態では、回転電機を車両に搭載する電動パワーステアリングに適用した例を示しており、車両のステアリングの操舵力をアシストするには回転電機本体以外に制御装置も必要になるが、制御装置についての図示を省略している。図1は回転電機の構成を説明するための断面図である。
図2と図3に回転子11と磁石12と磁石ホルダ13が組み立てられた状態の斜視図と側面図を示す。回転子11の外周に均一な間隔で複数の磁石12が配置され、磁石12の間には磁石12を固定および保持する磁石ホルダ13が磁石12と同数配置されている。
上記のようにして固定された磁石ホルダ13の外側には深絞りによって形成されたステンレスまたはアルミニウム等の非磁性材料からなる保護管14が外装されている。本実施の形態では磁石ホルダ13の外周は磁石12の外周より若干大き目に構成されており、保護管14は磁石ホルダ13に圧入気味に固定された後、端面を折り曲げ、磁石ホルダ13または回転子11の上下面に接触固定される。
次に本実施の形態2の回転子ユニット15の構成について図12から図16を用いて、詳細に説明する。
実施の形態2の回転子11と磁石12と磁石ホルダ13が組み立てられた状態の斜視図、側面図をそれぞれ図12、図13に示す。また、回転子11の斜視図を図14に示し、磁石ホルダ13の斜視図を図15に示す。磁石12は実施の形態1と同じである。なお、実施の形態1と同様の構成、作用については、説明を省略する。
まず、図17に示すように固定治具100に回転子11と8個の磁石12を設置し、8か所の可動治具101に磁石ホルダ13を、背面の穴13jと長穴13k(図15Bに図示)を基準に設置する。
実施の形態3では、実施の形態2の磁石取り付け構造をステップスキュー型の回転子ユニット15に適用したものについて説明する。
図19に示すように本実施の形態では2つの回転子11を周方向に所定の角度(数度)ずらし、軸方向に2段重ねて回転子軸10に圧入固定したものに対して、磁石12を磁石ホルダ13で固定する。
従って、例示されていない無数の変形例が、本願明細書に開示される技術の範囲内において想定される。例えば、少なくとも1つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも1つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。
Claims (10)
- 回転軸に固定された回転子、前記回転子の外周に配置された複数個の磁石、前記複数個の磁石の間に配置されている前記磁石を固定するホルダを備え、
前記回転子に、前記磁石を位置決めする位置決め部と、前記ホルダを圧入固定するための溝部が形成され、
前記ホルダには、前記溝部に圧入する圧入部と、前記磁石を固定するための押圧部が形成されており、
前記圧入部が前記溝部に圧入されていることにより、前記位置決め部で位置決めされた磁石の端部を前記押圧部が、押圧して固定していることを特徴とする回転電機。 - 前記位置決め部は、前記磁石の周方向側の一方の端部と係合しており、前記押圧部は前記圧入部の周方向側に形成され、前記圧入部が前記溝部に圧入されていることにより、前記磁石の前記位置決め部と係合していない周方向側他方の端部を前記押圧部が周方向および径方向に押圧していることを特徴とする請求項1に記載の回転電機。
- 前記磁石の前記位置決め部と係合している端部を前記押圧部が径方向に押圧していることを特徴とする請求項2に記載の回転電機。
- 前記位置決め部は、軸方向の一方の端部に形成されて前記磁石と係合しており、前記押圧部は前記ホルダの軸方向側に形成され、前記圧入部が前記溝部に圧入されていることにより、前記磁石の前記位置決め部と係合していない軸方向の他方の端部を前記押圧部が軸方向に押圧していることを特徴とする請求項1に記載の回転電機。
- 前記ホルダは、径方向の抜け止め手段を備えていることを特徴とする請求項1から4のいずれか一項に記載の回転電機。
- 前記抜け止め手段は、前記ホルダと一体形成された前記径方向に弾性変位する可撓部から延びた爪部からなることを特徴とする請求項5に記載の回転電機。
- 前記ホルダの前記圧入部と前記爪部は、前記回転軸方向から見て、平行に延在していることを特徴とする請求項6に記載の回転電機。
- 前記磁石は回転軸方向に複数段重ねられ、各段ごとに周方向にずれて配設されていることを特徴とする請求項1から7のいずれか一項に記載の回転電機。
- 前記ホルダは、軸方向に重ねられた前記磁石を一体として固定することを特徴とする請求項8に記載の回転電機。
- 複数の前記ホルダは前記回転子に同時に組付けられることを特徴とする請求項1から9のいずれか一項に記載の回転電機の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022541340A JP7403666B2 (ja) | 2020-08-03 | 2020-08-03 | 回転電機およびその製造方法 |
PCT/JP2020/029678 WO2022029842A1 (ja) | 2020-08-03 | 2020-08-03 | 回転電機およびその製造方法 |
CN202080104890.4A CN116134701A (zh) | 2020-08-03 | 2020-08-03 | 旋转电机以及旋转电机的制造方法 |
EP20948697.6A EP4191834A4 (en) | 2020-08-03 | 2020-08-03 | ELECTRIC LATHE AND METHOD FOR PRODUCING THEREOF |
US18/003,361 US20230246497A1 (en) | 2020-08-03 | 2020-08-03 | Rotating electrical machine and method for manufacturing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2020/029678 WO2022029842A1 (ja) | 2020-08-03 | 2020-08-03 | 回転電機およびその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022029842A1 true WO2022029842A1 (ja) | 2022-02-10 |
Family
ID=80117146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2020/029678 WO2022029842A1 (ja) | 2020-08-03 | 2020-08-03 | 回転電機およびその製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230246497A1 (ja) |
EP (1) | EP4191834A4 (ja) |
JP (1) | JP7403666B2 (ja) |
CN (1) | CN116134701A (ja) |
WO (1) | WO2022029842A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5044217B2 (ja) | 2004-07-16 | 2012-10-10 | 株式会社ミツバ | 回転電機のマグネット固定構造 |
JP2013162692A (ja) * | 2012-02-07 | 2013-08-19 | Nsk Ltd | ブラシレスモータ及び電動パワーステアリング装置 |
JP5842365B2 (ja) | 2011-04-02 | 2016-01-13 | 日本電産株式会社 | ロータユニット、回転電機、およびロータユニットの製造方法 |
JP2017221024A (ja) * | 2016-06-07 | 2017-12-14 | 株式会社ジェイテクト | 回転子および回転電機 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010133496A1 (en) * | 2009-05-22 | 2010-11-25 | Arcelik Anonim Sirketi | An electric motor having a permanent magnet rotor |
JP5966399B2 (ja) | 2012-02-07 | 2016-08-10 | 日本精工株式会社 | ブラシレスモータ及び電動パワーステアリング装置 |
JP6557180B2 (ja) * | 2016-06-17 | 2019-08-07 | ファナック株式会社 | 回転子部材、回転子、及び電動機 |
WO2019189729A1 (ja) * | 2018-03-30 | 2019-10-03 | 日本電産株式会社 | ロータ、モータおよび電動パワーステアリング装置 |
JP2020054211A (ja) * | 2018-09-28 | 2020-04-02 | 日本電産株式会社 | モータ |
-
2020
- 2020-08-03 JP JP2022541340A patent/JP7403666B2/ja active Active
- 2020-08-03 EP EP20948697.6A patent/EP4191834A4/en active Pending
- 2020-08-03 US US18/003,361 patent/US20230246497A1/en active Pending
- 2020-08-03 WO PCT/JP2020/029678 patent/WO2022029842A1/ja active Application Filing
- 2020-08-03 CN CN202080104890.4A patent/CN116134701A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5044217B2 (ja) | 2004-07-16 | 2012-10-10 | 株式会社ミツバ | 回転電機のマグネット固定構造 |
JP5842365B2 (ja) | 2011-04-02 | 2016-01-13 | 日本電産株式会社 | ロータユニット、回転電機、およびロータユニットの製造方法 |
JP2013162692A (ja) * | 2012-02-07 | 2013-08-19 | Nsk Ltd | ブラシレスモータ及び電動パワーステアリング装置 |
JP2017221024A (ja) * | 2016-06-07 | 2017-12-14 | 株式会社ジェイテクト | 回転子および回転電機 |
Non-Patent Citations (1)
Title |
---|
See also references of EP4191834A4 |
Also Published As
Publication number | Publication date |
---|---|
EP4191834A4 (en) | 2023-09-06 |
EP4191834A1 (en) | 2023-06-07 |
JP7403666B2 (ja) | 2023-12-22 |
JPWO2022029842A1 (ja) | 2022-02-10 |
US20230246497A1 (en) | 2023-08-03 |
CN116134701A (zh) | 2023-05-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8823239B2 (en) | Electrical machine | |
US7868504B2 (en) | Resolver | |
JP5044217B2 (ja) | 回転電機のマグネット固定構造 | |
JP5030794B2 (ja) | 回転電機 | |
JP5371149B2 (ja) | 回転検出器付きモータの構造 | |
JP2000069699A (ja) | 電動機のロータ | |
JP7149783B2 (ja) | 電動モータおよび電動モータの製造方法 | |
CN103580355A (zh) | 电动马达 | |
JP2019115121A (ja) | ロータ及びモータ | |
JP2010141993A (ja) | 回転電機用マグネットホルダ | |
US20220006342A1 (en) | Rotor, motor, and method for manufacturing rotor | |
JPH0715934A (ja) | モータ | |
WO2020054095A1 (ja) | 電動モータおよび電動モータの製造方法 | |
WO2018179736A1 (ja) | ロータ及びロータを備えたモータ | |
WO2022029842A1 (ja) | 回転電機およびその製造方法 | |
US10897177B2 (en) | Motor | |
EP3719966B1 (en) | Motor | |
US11799352B2 (en) | Motor device with ground bus bar | |
CN214799081U (zh) | 转子和马达 | |
JP5507921B2 (ja) | 回転検出器付きモータの構造 | |
CN112583212B (zh) | 马达 | |
JP7330011B2 (ja) | ロータ、モータ及びブラシレスワイパーモータ | |
CN113169629B (zh) | 电机 | |
US11757318B2 (en) | Rotor and motor having same | |
JP5953143B2 (ja) | 直流電動機の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20948697 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022541340 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2020948697 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2020948697 Country of ref document: EP Effective date: 20230303 |