WO2010087066A1 - アキシャルギャップ型モータ - Google Patents
アキシャルギャップ型モータ Download PDFInfo
- Publication number
- WO2010087066A1 WO2010087066A1 PCT/JP2009/069748 JP2009069748W WO2010087066A1 WO 2010087066 A1 WO2010087066 A1 WO 2010087066A1 JP 2009069748 W JP2009069748 W JP 2009069748W WO 2010087066 A1 WO2010087066 A1 WO 2010087066A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- axial gap
- type motor
- rotation axis
- gap type
- motor according
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
-
- 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
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2796—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
Definitions
- the present invention relates to an axial gap type motor.
- a pair of stators arranged opposite to each other so as to sandwich a rotor from both sides in the rotation axis direction is provided, and a magnetic flux loop via a pair of stators is formed with respect to a field magnetic flux generated by a permanent magnet of the rotor.
- An axial gap type rotating electrical machine is known (for example, see Patent Document 1).
- the axial gap motor 100 described in Patent Document 1 is disposed so as to face a rotor 101 that can rotate around a rotation axis, with the rotor 101 sandwiched from both sides in the rotation axis direction.
- the rotor 101 includes a pair of stators 102, 102, and the rotor 101 is disposed between magnet pole portions 103,..., 103 disposed at predetermined intervals in the circumferential direction and magnet pole portions 103, 103 adjacent in the circumferential direction. ., 104 and the magnetic material poles 104,..., 104 are housed in a rotor frame 105.
- each magnet pole portion 103 is composed of one magnet piece magnetized in the direction of the rotation axis, the arrow in FIG. As shown in Fig. 1, a closed loop of magnetic flux is formed. For this reason, the magnetic flux which goes to each stator 102 from the magnet pole part 103 short-circuits, and there exists a possibility that the generated torque of a motor may reduce or efficiency may fall. In order to avoid this, it is necessary to increase the thickness of the spoke 106 of the rotor frame 105. However, if the thickness of the spoke 106 is increased, the magnet pole portion 103 and the magnetic material pole portion 104 must be reduced. The torque could not be improved.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an axial gap type motor that can suppress a short circuit of magnetic flux and suppress a decrease in torque generated by the motor and a decrease in efficiency. is there.
- a rotor rotatable around a rotation axis An axial gap type motor comprising a pair of stators arranged opposite to each other with the rotor sandwiched from both sides in the rotation axis direction,
- the rotor is Magnet pole portions arranged at predetermined intervals in the circumferential direction;
- a magnetic material pole portion disposed between the magnet pole portions adjacent in the circumferential direction,
- the magnet pole portion is A main magnet piece magnetized in the direction of the rotation axis, and arranged on one side of the rotation axis direction and on both sides in the circumferential direction of the main magnet piece, and magnetized in a direction perpendicular to the rotation axis direction and the radial direction, respectively.
- each of the sub magnet pieces has a tapered portion whose thickness gradually decreases toward a substantially central portion of the main magnet piece. A central portion is exposed to the pair of stators.
- the main magnet piece, the pair of sub magnet pieces arranged on one side in the rotation axis direction, and the other side in the rotation axis direction are arranged.
- the pair of sub-magnet pieces are integrated by an adhesive or by sintering.
- the magnetic material electrode portion is formed of a magnetic member made of a laminate of silicon steel plates or a soft magnetic material, and is magnetic in the rotation axis direction. It has a saliency.
- the magnetic member has a through-hole penetrating in the rotation axis direction.
- the rotor includes a plurality of spokes arranged between the magnet pole portion and the magnetic material pole portion and extending in the radial direction,
- a non-magnetic rotor frame having a shaft portion and a rim portion respectively provided on an inner diameter side and an outer diameter side of a plurality of spokes is provided.
- the rotor frame includes a plurality of spokes arranged between the magnet pole portion and the magnetic material pole portion and extending in a radial direction, and an inner diameter side of the plurality of spokes And a first frame and a second frame each having a shaft portion and a rim portion respectively provided on the outer diameter side, and the first and second frames are assembled in the axial direction. To do.
- a holding portion that holds the magnetic material pole portion on the outer side in the rotation axis direction of the shaft portion and the rim portion of the first and second frames is provided.
- the magnetic material pole portion is provided with a clearance groove extending in a circumferential direction to be engaged with the holding portion.
- a claw portion for fixing the magnet pole portion is provided on the outer side in the rotation axis direction of the spoke of the first and second frames. It is characterized by that.
- the magnet pole portion is provided with a radially extending escape groove that engages with the claw portion of the spoke.
- the plate thickness of the spoke is larger than a gap formed between the rotor and the stator.
- an insulating layer is provided on the surface of the spoke.
- the spoke is extended along the inner diameter side extending portion extending along the shaft portion and the rim portion.
- the inner diameter side extending portion and the outer diameter side extending portion are joined to the shaft portion and the rim portion, respectively, by welding.
- an outer peripheral ring is fitted to the rim portions of the first and second rotor frames.
- the spoke is formed by press molding together with the claw portion.
- the shaft portion and the rim portion are each formed by press molding together with the holding portion.
- each stator is linked.
- the effective magnetic flux to be increased relatively increases, and magnetic fluxes other than the magnetic flux toward each stator converge inside the magnet pole portion. Therefore, it is possible to suppress a short circuit of the magnetic flux between the magnetic material pole portions adjacent to each other in the circumferential direction, and thereby it is possible to suppress a decrease in torque generated by the motor and a decrease in efficiency.
- the magnet pole portion is composed of an integrated magnet having a substantially Halbach arrangement in which a pair of sub magnet pieces are arranged on one side and the other side of the main magnet piece in advance, the attachment to the rotor frame is improved and the manufacturing process is improved. Can be simplified.
- the polar arc angle can be easily adjusted by adjusting the inclination of the tapered portion. Can be adjusted.
- magnetic saliency can be easily imparted to the magnetic member by forming the through hole.
- the assemblability can be improved by dividing the rotor frame in the axial direction.
- the magnetic material pole can be reliably held in the rotor frame.
- the clearance between the rotor and the stator can be set to a minimum by using the engaging portion that engages with the holding portion as a relief groove.
- the magnet pole portion can be securely held in the rotor frame.
- the gap between the rotor and the stator can be set to a minimum by using the engaging portion that engages with the claw portion as a relief groove.
- board thickness of a spoke is made thicker than the space
- the rotor frame is cut out from one member (solid material having a columnar shape or a cylindrical shape) by press-molding a flat plate material of the spoke and welding it to the shaft portion and the rim portion. Compared with the case of processing, the manufacturing time can be shortened.
- the rigidity of the rotor frame can be increased by fitting the outer ring to the rim portion, and the rim portion can be thinned and can be easily manufactured by press molding. .
- the strength can be increased by work hardening by press molding.
- FIG. 1 is an overall perspective view of an embodiment of an axial gap motor according to the present invention. It is a disassembled perspective view of the axial gap type motor shown in FIG. It is a disassembled perspective view of the axial gap type motor shown in FIG. (A) is a front view of the rotor, (b) is a sectional view taken along line IVB-IVB in (a), and (c) is a sectional view taken along line IVC-IVC. It is a whole perspective view of the integrated magnet which comprises a magnet pole part. It is a whole perspective view of the magnetic member which comprises a magnetic material pole part. It is a fragmentary perspective view of the 1st frame which constitutes a rotor frame.
- FIG. 1 is a perspective view of an axial gap type motor described in Patent Document 1.
- FIG. It is the figure which looked at the axial gap type motor of FIG. 15 from the circumferential direction.
- the axial gap type motor 10 includes a substantially annular rotor 11 that is rotatably provided around the rotation axis O of the axial gap type motor 10, and a rotation axis O direction.
- a pair of stators 12 and 12 each having a plurality of phase stator windings that generate a rotating magnetic field that rotates the rotor 11 are arranged so as to sandwich the rotor 11 from both sides.
- the axial gap type motor 10 is mounted as a drive source in a vehicle such as a hybrid vehicle or an electric vehicle, for example, and an output shaft is connected to an input shaft of a transmission (not shown), whereby the driving force of the axial gap type motor 10 is obtained. Is transmitted to drive wheels (not shown) of the vehicle via a transmission.
- the axial gap type motor 10 when the driving force is transmitted from the driving wheel side to the axial gap type motor 10 during deceleration of the vehicle, the axial gap type motor 10 functions as a generator to generate a so-called regenerative braking force, and the kinetic energy of the vehicle body is electrically converted. Recover as energy (regenerative energy). Further, for example, in a hybrid vehicle, when the rotating shaft of the axial gap type motor 10 is connected to the crankshaft of an internal combustion engine (not shown), the axial gap type motor 10 is also axially transmitted. The gap type motor 10 functions as a generator and generates power generation energy.
- Each stator 12 faces the rotor 11 along the direction of the rotation axis O from a substantially annular plate-shaped yoke portion 21 and a position at a predetermined interval in the circumferential direction on the facing surface of the yoke portion 21 facing the rotor 11.
- a plurality of teeth 22,..., 22 that protrude and extend in the radial direction, and stator windings (not shown) mounted between the appropriate teeth 22, 22 are configured.
- Each stator 12 is, for example, a 6N type having six main poles (for example, U +, V +, W +, U ⁇ , V ⁇ , W ⁇ ), and each U +, V +, W + pole of one stator 12.
- the U-, V-, and W-poles of the other stator 12 are set to face each other in the direction of the rotation axis O.
- the rotor 11 includes a plurality of magnet pole portions 31,..., A plurality of magnetic material pole portions 32,... 32, a rotor frame 33 made of a non-magnetic material, as shown in FIGS.
- the magnet pole portions 31 and the magnetic material pole portions 32 are accommodated in the rotor frame 33 to which the outer ring 50 is mounted in a state of being alternately arranged in the circumferential direction. Yes.
- the magnet pole portion 31 includes a substantially fan-shaped main permanent magnet piece 41 and a pair of ones arranged on one side of the rotation axis O direction and on both sides in the circumferential direction of the main permanent magnet piece 41.
- the first secondary permanent magnet pieces 42, 42 and a pair of second secondary permanent magnet pieces 43, 43 disposed on the other side in the rotation axis O direction and on both sides in the circumferential direction of the main permanent magnet piece 41, for example, It is comprised from the integrated magnet 44 integrally formed by the adhesive material or sintering.
- the main permanent magnet piece 41 is magnetized in the direction of the rotation axis O, and the magnetization directions of the main permanent magnet pieces 41 and 41 of the magnet pole portions 31 and 31 adjacent in the circumferential direction with the magnetic material pole portion 32 interposed therebetween are different from each other. It is set to become.
- the secondary permanent magnet pieces 42 (43) each have a substantially fan-shaped plate shape with a circumferential length of half or less of that of the main permanent magnet piece 41.
- a tapered surface 421 (431) whose thickness gradually decreases toward the central portion 410 of the main permanent magnet piece 41 is formed on the opposing side surface of the pair of sub permanent magnet pieces 42, 42 (43, 43).
- An escape groove 422 (432) having a substantially L-shaped cross section extending in the radial direction is formed at a corner portion that does not contact the main permanent magnet piece 41 on the surface opposite to the surface 421 (431).
- the pair of sub permanent magnet pieces 42, 42 (43, 43) are provided symmetrically with respect to the magnet center line P of the main permanent magnet piece 41.
- the distance from the center line P to the tapered surface 421 (431) is d and the angle of the tapered surface is ⁇ , d> 0 and 0 ⁇ ⁇ 90 ° are set.
- the distance d may be set so as to gradually increase from the inner diameter side to the outer diameter side as shown in FIG. 5, or may be constant.
- the area of the central portion 410 of the main permanent magnet piece 41 increases as the volume of the teeth 22 of the stator 12 increases, so that the magnetic flux can be made uniform. Magnetic flux can be exchanged efficiently.
- the magnet amount of the sub permanent magnet pieces 42 and 42 (43, 43) can be reduced.
- the first sub permanent magnet pieces 42 and 42 are magnetized in a direction (substantially circumferential direction) orthogonal to the rotation axis direction and the radial direction, respectively, and the first sub permanent magnet pieces 42 and 42 are the main permanent magnet pieces 41.
- the second sub permanent magnet pieces 43 and 43 are magnetized in a direction (substantially circumferential direction) perpendicular to the rotation axis direction and the radial direction, respectively, so that the same magnetic pole as the magnetic pole on one side of the rotation axis direction faces each other.
- the second sub permanent magnet pieces 43, 43 are arranged so that the magnetic poles of the same polarity as the magnetic poles on the other side in the rotation axis direction of the main permanent magnet pieces 41 face each other.
- Reference numeral 42 denotes a pair of second sub-permanent magnet pieces 43 and 43 which are arranged so that their N poles face each other in the circumferential direction and are arranged on the other side in the rotation axis O direction. It arrange
- the magnetic flux of the main permanent magnet piece 41 and the sub permanent magnet pieces 42, 42, 43, 43 is converged at the central portion 410 of the main permanent magnet piece 41 due to the magnetic flux lens effect by the so-called Halbach arrangement of so-called permanent magnets,
- the effective magnetic flux linked to the stators 12 and 12 is relatively increased.
- each of the sub permanent magnet pieces 42, 42, 43, 43 is different from the main permanent magnet piece 41 so as to be different from the magnetic pole of the main permanent magnet piece 41 on the circumferential end side of the main permanent magnet piece 41. It faces in the direction of the rotation axis O. That is, for example, with respect to the main permanent magnet piece 41 in which one side in the rotation axis O direction is an N pole and the other side is an S pole, each first sub permanent magnet piece 42, 42 arranged on one side in the rotation axis O direction.
- the magnetic fluxes of the main permanent magnet piece 41 and the sub permanent magnet pieces 42, 42, 43, 43 converge within the integrated magnet 44.
- the magnetic material pole portion 32 is composed of a magnetic member 45 having a plurality of slits 450,..., 450 penetrating in a direction parallel to the rotation axis O direction. And a plurality of silicon steel plates are laminated, or a soft magnetic material such as iron powder is formed and sintered.
- the slit 450 has a cross-sectional shape with respect to the rotation axis O direction as a long hole whose longitudinal direction is the radial direction, and a plurality (four in this case) are arranged at predetermined intervals in the circumferential direction.
- clearance grooves 451 and 452 having an L-shaped cross section extending in the circumferential direction are formed at the inner peripheral corner and the outer peripheral corner of the magnetic member 45.
- the rotor frame 33 includes a plurality of spokes 35,..., 35 disposed between the magnet pole portion 31 and the magnetic material pole portion 32 adjacent in the circumferential direction and extending in the radial direction.
- 35,..., 35 are connected to the inner peripheral side annular shaft portion 36, the outer peripheral side annular rim portion 37, and an external drive shaft (for example, a vehicle transmission) formed on the inner peripheral portion of the shaft portion 36.
- an external drive shaft for example, a vehicle transmission
- a connecting portion connected to an input shaft or the like.
- the rotor frame 33 includes a pair of spokes extending in the radial direction and disposed between the shaft portion 36a (36b) and the rim portion 37a (37b), and between the shaft portion 36a (36b) and the rim portion 37a (37b).
- First and second frames 33A and 33B having a plurality of spoke forming members 38a,..., 38a (38b,..., 38b) (see FIG. 7) having 35a, 35a (35b, 35b) are opposed in the axial direction.
- the shaft portion 36a of the first frame 33A and the shaft portion 36b of the second frame 33B constitute the shaft portion 36 of the rotor frame 33, and the rim portion 37a of the first frame 33A and the second frame 33B.
- the rim portion 37 of the rotor frame 33 is configured by the shaft portion 37b of the first frame 33A. 35a and the spokes 35 of the rotor frame 33 by spokes 35b of the second frame 33B, ..., 35 are configured.
- the shaft portion 36a (36b), the rim portion 37a (37b), and the plurality of spoke forming members 38a,..., 38a (38b,..., 38b) are each formed from a thin plate material by press molding.
- the integrated magnet 44 and the magnetic member 45 are arranged so as to be adjacent to each other in the circumferential direction via the spoke 35, and are sandwiched between the shaft portion 36 and the rim portion 37 from both sides in the radial direction.
- a magnetic material is provided at both ends of the shaft portion 36 in the rotation axis O direction, that is, at one end portion in the rotation axis O direction of the shaft portion 36a and the other end portion in the rotation axis O direction of the shaft portion 36b.
- Holding portions 361 and 361 extending outward in the radial direction are provided at positions where the magnetic member 45 of the pole portion 32 is accommodated, and engage with escape grooves 451 and 451 formed in the magnetic member 45.
- the magnetic member of the magnetic material pole portion 32 is provided at both ends of the rim portion 37 in the rotation axis O direction, that is, at one end portion of the rim portion 37a in the rotation axis O direction and at the other end portion of the rim portion 37b in the rotation axis O direction.
- Holding portions 371 and 371 extending inward in the radial direction are provided at positions for accommodating 45, and engage with escape grooves 452 and 452 formed in the magnetic member 45.
- the magnetic member 45 is positioned in the direction of the rotation axis O in the rotor frame 33 by the holding portions 361 and 371 and is securely held in the rotor frame 33.
- the magnetic member 45 and the holding portions 361 and 371 are configured to be flush with each other in a cross-sectional view in the direction perpendicular to the axis (see FIGS. 12 to 14).
- the holding portions 361 and 371 are formed by press molding together with the shaft portion 36a (36b) and the rim portion 37a (37b), respectively.
- the spoke forming member 38a (38b) has a substantially fan-shaped shape in a cross-sectional view perpendicular to the axis so as to surround the integrated magnet 44 from the circumferential direction and the radial direction, and has a substantially central shape on the outer diameter side.
- An opening 381 is formed in the part. That is, the spoke forming member 38a (38b) includes a pair of spokes 35a, 35a (35b, 35b) provided on both sides in the circumferential direction, and a shaft portion 36a (36b) from the inner diameter side of the spokes 35a, 35a (35b, 35b).
- An inner diameter side extending portion 382 that extends along the rim and connects the pair of spokes 35a, 35a (35b, 35b) to each other, and along the rim portion 37a from the outer diameter side of the pair of spokes 35a, 35a (35b, 35b).
- the outer diameter side extending portions 383 and 383 are provided so as to face each other across the opening 381.
- the shaft portion 36a (36b) and the inner diameter side extending portion 382 are joined by welding at both ends of the inner diameter side extending portion 382, and the rim portion 37a (37b) and the outer diameter side extending portions 383 and 383 are welded. Are joined together.
- the spokes 35a, 35a of the spoke forming member 38a have one end on the one side in the rotational axis O direction and the spoke 35b, 35b of the spoke forming member 38b on the other end on the other side in the rotational axis O, that is, in the circumferential direction.
- Claw portions 351 and 351 that are bent toward the magnetized magnet 44 are provided, and are engaged with escape grooves 422, 422, 432, and 432 formed in the sub permanent permanent magnet pieces 42, 42, 43, and 43 of the integrated magnet 44. Match.
- the integrated magnet 44 is positioned in the direction of the rotation axis O in the rotor frame 33 by the claw portions 351 and 351 and is securely held in the rotor frame 33.
- the sub permanent magnet pieces 42, 42, 43, 43 and the claw portions 351, 351, 351, 351 are configured to be flush with each other in a cross-sectional view in the direction perpendicular to the axis.
- claw part 351 is formed by press molding with the spoke 35a (35b).
- the plate thickness (circumferential length) of the spoke 35a is thicker than the gap between the rotor 11 and the stator 12, and an insulating layer may be provided on the surface of the spoke 35a (35b).
- the outer peripheral ring 50 is made of, for example, a nonmagnetic material such as a stainless steel plate, and is attached to the outer peripheral surface of the rim portion 37 of the rotor frame 33 so as to generate a compressive stress in the rotor frame 33.
- the attachment method should just be attached so that a compressive stress may generate
- a method for assembling the rotor 11 of the axial gap type motor 10 of this embodiment will be described.
- a plurality of spoke forming members 38a,..., 38a are arranged at predetermined intervals on the outer peripheral side of the shaft portion 36a, and welded at both ends of each inner diameter side extending portion 382 to the outer peripheral surface of the shaft portion 36a.
- the shaft portion 36a and the spoke forming members 38a, ..., 38a are joined.
- the holding portion 361 formed on the shaft portion 36a and the claw portion 351 formed on the spoke 35 are joined so as to be on the same side in the rotation axis O direction.
- FIG. 10 a plurality of spoke forming members 38a,..., 38a are arranged at predetermined intervals on the outer peripheral side of the shaft portion 36a, and welded at both ends of each inner diameter side extending portion 382 to the outer peripheral surface of the shaft portion 36a.
- the shaft portion 36a and the spoke forming members 38a, ..., 38a are joined.
- the first frame 33A is manufactured by arranging the rim portion 37a so as to be on the same side and welding the outer diameter side extending portions 383 and 383 to join the rim portion 37a to the spoke forming members 38a,.
- the first grooves 422 and 422 formed in the auxiliary permanent magnet piece 42 of the integrated magnet 44 are engaged with the claws 351 and 351 formed in the spoke 35a.
- the integrated magnets 44, ..., 44 are mounted in the spoke forming members 38a, ..., 38a of the frame 33A, respectively.
- the clearance grooves 451 and 452 formed on the magnetic member 45 are engaged with the holding portion 361 formed on the shaft portion 36 and the holding portion 371 formed on the rim portion 37a.
- the magnetic members 45,..., 45 are respectively mounted between the spoke forming members 38a, 38a adjacent in the circumferential direction.
- the second frame 33B manufactured in the same manner as the first frame 33A is attached to the first frame 33A from the opposite side to the rotation axis O direction, and as shown in FIG. 14, the rim portion 37a.
- the outer peripheral ring 50 is press-fitted into the outer peripheral surface of 37b.
- a pair of sub permanent magnet pieces 42, 42, 43, 43 are arranged on one side and the other side of the main permanent magnet piece 41, respectively.
- the pole portion 31 is constituted by the integrated magnet 44 having a substantially Halbach arrangement, the effective magnetic flux linked to the stators 12 and 12 is relatively increased, and magnetic fluxes other than the magnetic fluxes directed to the stators 12 and 12 are magnet poles. It converges inside the integrated magnet 44 constituting the part 31. Therefore, a short circuit of the magnetic flux with the magnetic member 45 of the magnetic material pole portion 32 adjacent in the circumferential direction can be suppressed, and thereby a reduction in torque generated by the motor and a reduction in efficiency can be suppressed.
- the magnet pole portion 31 is configured by the integrated magnet 44 having a substantially Halbach arrangement in which a pair of sub permanent magnet pieces 42, 42, 43, 43 are arranged on one side and the other side of the main permanent magnet piece 41 in advance, The attachment property to the rotor frame 33 is improved, and the manufacturing process can be simplified.
- the sub permanent magnet pieces 42 and 42 are tapered surfaces 421 whose thickness gradually decreases toward the substantially central portion 410 of the main permanent magnet piece 41. Since (431) is included, the polar arc angle can be easily adjusted by adjusting the inclination of the tapered surface 421 (431).
- the main permanent magnet piece 41 and the sub permanent magnet pieces 42, 42, 43, 43 are integrated by an adhesive or by sintering, so that they can be easily integrated.
- the magnetized magnet 44 can be manufactured.
- the magnetic member 45 constituting the magnetic material electrode portion 32 can be manufactured easily by laminating silicon steel plates, or by forming and sintering with a soft magnetic material. By forming 450, magnetic saliency can be easily imparted to the magnetic member 45.
- the assemblability can be improved by dividing the rotor frame 33 for transmitting the rotational torque in the axial direction.
- the holding portion 361 that holds the magnetic member 45 of the magnetic material pole portion 32 on the outer side in the rotation axis O direction of the shaft portion 36a (36b) and the rim portion 37a (37b).
- 371 and clearance grooves 451 and 452 that engage with the holding portions 361 and 371 are provided in the magnetic member 45, so that the magnetic member 45 can be reliably held in the rotor frame 33.
- the clearance between the rotor 11 and the stator 12 can be set to a minimum by making the engaging portions engaging with the holding portions 361 and 371 into the escape grooves 451 and 452.
- the shaft portion 36a (36b) and the rim portion 37a (37b) are formed by press molding together with the holding portions 361 and 371, respectively, the strength can be increased by work hardening by press molding.
- the claw part 351 which fixes the integrated magnet 44 of the magnet pole part 31 is provided in the rotating shaft O direction outer side of the spoke 35a (35b), and an integrated magnet Since the clearance grooves 422 and 432 that engage with the claw portions 351 and 351 are provided in the shaft 44, the integrated magnet 44 can be reliably held in the rotor frame 33. Moreover, the clearance between the rotor 11 and the stator 12 can be set to a minimum by making the engaging portions that engage with the claw portions 351 into the escape grooves 451 and 452. Furthermore, since the spoke 35a (35b) is formed by press molding together with the claw portion 351, the strength can be increased by work hardening by press molding.
- board thickness of the spoke 35a (35b) is set thicker than the space
- the spokes 35a (35b) are provided along the inner diameter side extending portion 382 and the rim portion 37a (37b) extending along the shaft portion 36a (36b).
- the inner diameter side extending portion 382 and the outer diameter side extending portion 383, 383 are joined to the shaft portion 36a (36b) and the rim portion 37a (37b) by welding, respectively. Therefore, the spoke 35a (35b), the shaft portion 36a (36b), and the rim portion 37a (37b) can be manufactured by press working, and the rotor frame 33 can be formed from one member (solid material having a columnar shape or a cylindrical shape). Manufacturing time can be shortened compared with the case of cutting and processing.
- spokes 35a and 35a (35b and 35b) adjacent in the circumferential direction are integrated by the inner diameter side extending portion 382 and / or the outer diameter side extending portions 383 and 383, and the spoke forming member 38a (38b) is formed from one flat plate. ), The number of parts can be reduced, and the assembly process can be simplified.
- the rigidity of the rotor frame 33 can be increased by fitting the outer ring 50 to the rim portion 37 of the rotor frame 33, and the rim portion 37 is made thin. Can be easily manufactured by press molding.
- the tapered surface 421 (431) is formed on the sub permanent magnet pieces 42 and 42 (43, 43), the tapered surface 421 (431) is not necessarily formed.
- the spokes 35a, 35a (35b, 35b) adjacent in the circumferential direction are connected to each other by the inner diameter side extending portion 382 of the spoke forming member 38a (38b), but are connected by the outer diameter side extending portion 383.
- the inner diameter side extending portion 382 and the outer diameter side extending portion 383 may be connected to each other, and the spokes 35a and 35b may be provided independently.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
(1)回転軸周りに回転可能なロータと、
回転軸方向の両側から前記ロータを挟んで対向配置される一対のステータと、を備えるアキシャルギャップ型モータであって、
前記ロータは、
周方向に所定の間隔で配置される磁石極部と、
周方向で隣り合う前記磁石極部間に配置される磁性材極部と、を備え、
前記磁石極部は、
回転軸方向に磁化された主磁石片と、回転軸方向一方側であって前記主磁石片の周方向両側に配置され、それぞれ回転軸方向および径方向に直交する方向に磁化され前記主磁石片の回転軸方向一方側の磁極と同極の磁極が対向する一対の副磁石片と、回転軸方向他方側であって前記主磁石片の周方向両側に配置され、それぞれ回転軸方向および径方向に直交する方向に磁化され前記主磁石片の回転軸方向他方側の磁極と同極の磁極が対向する一対の副磁石片と、が一体となった一体化磁石から構成され、前記主磁石片の一部が前記一対のステータに露出する、ことを特徴とする。
また、各ステータに向かう磁束以外の磁束が磁石極部内部で収束するため、ロータフレームのスポーク部の厚さを薄くすることができ、磁石極部及び磁性材極部の占有率を向上させてモータの発生トルクを増大させることができる。
さらに、磁石極部を予め主磁石片の一方側と他方側にそれぞれ一対の副磁石片を配置した略ハルバッハ配置の一体化磁石で構成したので、ロータフレームへの取付け性が向上し、製造工程を簡略化することができる。
また、各ステータ12、12に向かう磁束以外の磁束が一体化磁石44内部で収束するため、ロータフレーム33のスポーク35の厚さを薄くすることができ、磁石極部31及び磁性材極部32の占有率を向上させてモータの発生トルクを増大させることができる。
さらに、磁石極部31を予め主永久磁石片41の一方側と他方側にそれぞれ一対の副永久磁石片42、42、43、43を配置した略ハルバッハ配置の一体化磁石44で構成したので、ロータフレーム33への取付け性が向上し、製造工程を簡略化することができる。
さらに、周方向で隣り合うスポーク35a、35a(35b、35b)を内径側延設部382及び/又は外径側延設部383、383で一体化し、一枚の平板からスポーク形成部材38a(38b)として形成することにより部品点数を削減することができ、組付け工程を簡易化することができる。
また、周方向で隣り合うスポーク35a、35a(35b、35b)は、スポーク形成部材38a(38b)の内径側延設部382によって互いに接続されているが、外径側延設部383によって接続されても、内径側延設部382と外径側延設部383の両方によって接続されていてもよく、また、各スポーク35a、35bはそれぞれ独立に設けられていてもよい。
11 ロータ
12 ステータ
31 磁石極部
32 磁性材極部
33 ロータフレーム
33A 第1フレーム
33B 第2フレーム
35、35a、35b スポーク
351 爪部
36、36a、36b シャフト部
361 保持部
37、37a、37b リム部
371 保持部
38a、38b スポーク形成部材
382 内径側延設部
383 外径側延設部
41 主永久磁石片(主磁石片)
410 中央部
42 副永久磁石片(副磁石片)
421 テーパ面(テーパ部)
422 逃げ溝
43 副永久磁石片(副磁石片)
431 テーパ面(テーパ部)
432 逃げ溝
44 一体化磁石
45 磁性部材
450 スリット(貫通孔)
451 逃げ溝
452 逃げ溝
50 外周リング
O 回転軸
Claims (18)
- 回転軸周りに回転可能なロータと、
回転軸方向の両側から前記ロータを挟んで対向配置される一対のステータと、を備える
アキシャルギャップ型モータであって、
前記ロータは、
周方向に所定の間隔で配置される磁石極部と、
周方向で隣り合う前記磁石極部間に配置される磁性材極部と、を備え、
前記磁石極部は、
回転軸方向に磁化された主磁石片と、回転軸方向一方側であって前記主磁石片の周方向両側に配置され、それぞれ回転軸方向および径方向に直交する方向に磁化され前記主磁石片の回転軸方向一方側の磁極と同極の磁極が対向する一対の副磁石片と、回転軸方向他方側であって前記主磁石片の周方向両側に配置され、それぞれ回転軸方向および径方向に直交する方向に磁化され前記主磁石片の回転軸方向他方側の磁極と同極の磁極が対向する一対の副磁石片と、が一体となった一体化磁石から構成され、前記主磁石片の一部が前記一対のステータに露出する、
ことを特徴とするアキシャルギャップ型モータ。 - 前記副磁石片は、それぞれ前記主磁石片の略中央部に向かって次第に厚さが漸減するテーパ部を有し、
前記主磁石片の略中央部が前記一対のステータに露出する、
ことを特徴とする請求項1に記載のアキシャルギャップ型モータ。 - 前記主磁石片と、回転軸方向一方側に配置された前記一対の副磁石片と、回転軸方向他方側に配置された前記一対の副磁石片とは、接着材により、又は焼結により一体化される、
ことを特徴とする請求項1に記載のアキシャルギャップ型モータ。 - 前記磁性材極部は、珪素鋼板を積層した、又は軟磁性体の磁性部材で構成され、回転軸方向に磁気突極性を有する、
ことを特徴とする請求項1に記載のアキシャルギャップ型モータ。 - 前記磁性部材は、回転軸方向に貫通する貫通孔を有する、
ことを特徴とする請求項4に記載のアキシャルギャップ型モータ。 - 前記ロータは、前記磁石極部と前記磁性材極部間に配置されて径方向に延びる複数のスポークと、前記複数のスポークの内径側及び外径側にそれぞれ設けられるシャフト部及びリム部と、を有する非磁性のロータフレームを備える、
ことを特徴とする請求項1に記載のアキシャルギャップ型モータ。 - 前記ロータフレームは、前記磁石極部と前記磁性材極部間に配置されて径方向に延びる複数のスポークと、前記複数のスポークの内径側及び外径側にそれぞれ設けられるシャフト部及びリム部と、をそれぞれ有する第1及び第2フレームから構成され、前記第1及び第2フレームを軸方向に組付けて構成される
ことを特徴とする請求項6に記載のアキシャルギャップ型モータ。 - 前記第1及び第2フレームの前記シャフト部及び前記リム部の回転軸方向外側に前記磁性材極部を保持する保持部を有する、
ことを特徴とする請求項7に記載のアキシャルギャップ型モータ。 - 前記磁性材極部には、前記保持部と係合する周方向に伸びる逃げ溝が設けられる、
ことを特徴とする請求項8に記載のアキシャルギャップ型モータ。 - 前記第1及び第2フレームの前記スポークの回転軸方向外側には前記磁石極部を固定する爪部が設けられる、
ことを特徴とする請求項7に記載のアキシャルギャップ型モータ。 - 前記磁石極部には、前記スポークの爪部と係合する径方向に伸びる逃げ溝が設けられる、ことを特徴とする請求項10に記載のアキシャルギャップ型モータ。
- 前記スポークの板厚は、前記ロータと前記ステータ間に形成される空隙よりも厚い、
ことを特徴とする請求項1に記載のアキシャルギャップ型モータ。 - 前記スポークの表面に絶縁層を設けた、
ことを特徴とする請求項6に記載のアキシャルギャップ型モータ。 - 前記スポークは、前記シャフト部に沿って延設された内径側延設部と前記リム部に沿って延設された外径側延設部と一体に構成され、
前記内径側延設部と前記外径側延設部は、それぞれ前記シャフト部及び前記リム部に溶接により接合される、
ことを特徴とする請求項6に記載のアキシャルギャップ型モータ。 - 前記第1及び第2ロータフレームのリム部には、外周リングが嵌合される、
ことを特徴とする請求項6に記載のアキシャルギャップ型モータ。 - 前記スポークは前記爪部とともにプレス成形により形成される、
ことを特徴とする請求項10に記載のアキシャルギャップ型モータ。 - 前記シャフト部及び前記リム部はそれぞれ前記保持部とともにプレス成形により形成される、
ことを特徴とする請求項8に記載のアキシャルギャップ型モータ。 - 車両に用いられることを特徴とする請求項1に記載のアキシャルギャップ型モータ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0924160A BRPI0924160A2 (pt) | 2009-01-28 | 2009-11-20 | motor com entreferro axial |
RU2011135822/07A RU2011135822A (ru) | 2009-01-28 | 2009-11-20 | Двигатель с осевым зазором |
CN200980155539.1A CN102301565B (zh) | 2009-01-28 | 2009-11-20 | 轴向间隙型电机 |
US13/145,779 US8304949B2 (en) | 2009-01-28 | 2009-11-20 | Axial gap motor |
DE112009004300T DE112009004300T5 (de) | 2009-01-28 | 2009-11-20 | Axialspaltmotor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-017042 | 2009-01-28 | ||
JP2009017042A JP5046051B2 (ja) | 2009-01-28 | 2009-01-28 | アキシャルギャップ型モータ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010087066A1 true WO2010087066A1 (ja) | 2010-08-05 |
Family
ID=42395333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/069748 WO2010087066A1 (ja) | 2009-01-28 | 2009-11-20 | アキシャルギャップ型モータ |
Country Status (7)
Country | Link |
---|---|
US (1) | US8304949B2 (ja) |
JP (1) | JP5046051B2 (ja) |
CN (1) | CN102301565B (ja) |
BR (1) | BRPI0924160A2 (ja) |
DE (1) | DE112009004300T5 (ja) |
RU (1) | RU2011135822A (ja) |
WO (1) | WO2010087066A1 (ja) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5438749B2 (ja) * | 2008-03-19 | 2014-03-12 | ホガナス アクチボラグ (パブル) | 磁束集中型極片を持つ永久磁石回転子 |
WO2010064510A1 (ja) * | 2008-12-03 | 2010-06-10 | 本田技研工業株式会社 | アキシャルギャップ型モータ及びそのロータ製造方法 |
JP5027169B2 (ja) * | 2009-01-30 | 2012-09-19 | 本田技研工業株式会社 | アキシャルギャップ型モータ及びそのロータ製造方法 |
WO2011046108A1 (ja) * | 2009-10-16 | 2011-04-21 | 国立大学法人北海道大学 | アキシャルギャップモータ |
MX367739B (es) * | 2011-07-14 | 2019-09-04 | Tidnab Innovations Inc | Montaje de rueda que define un motor/generador. |
JP5596646B2 (ja) * | 2011-09-20 | 2014-09-24 | 和明 小林 | 回転電機 |
TWI483514B (zh) * | 2012-11-09 | 2015-05-01 | Ind Tech Res Inst | 軸向磁通集磁轉子結構 |
JP2015061394A (ja) * | 2013-09-18 | 2015-03-30 | 富士重工業株式会社 | 回転電機 |
JP6255231B2 (ja) * | 2013-12-11 | 2017-12-27 | 株式会社ダイナックス | アキシャルギャップモータ |
GB2525582B (en) * | 2014-02-26 | 2018-06-27 | Yasa Ltd | Asymmetric machines |
DE102015207915A1 (de) * | 2015-04-29 | 2016-11-03 | Robert Bosch Gmbh | Ringmagnet mit Schlitzen zur Aufnahme von Fremdpartikeln, sowie eine elektrische Maschine beinhaltend einen solchen, sowie Verfahren zur Herstellung eines solchen |
US10141822B2 (en) | 2015-05-04 | 2018-11-27 | Launchpoint Technologies, Inc. | Axial flux brushless permanent magnet electrical machine rotor |
GB2538515B (en) * | 2015-05-19 | 2021-09-29 | Time To Act Ltd | Improved rotor for permanent magnet generator |
US10075030B2 (en) * | 2015-08-11 | 2018-09-11 | Genesis Robotics & Motion Technologies Canada, Ulc | Electric machine |
DE102017104076A1 (de) | 2016-02-26 | 2017-08-31 | Kongsberg Automotive Inc. | Gebläseeinheit für einen Fahrzeugsitz |
KR101904872B1 (ko) | 2017-01-31 | 2018-10-08 | 엘지전자 주식회사 | 축방향 공극형 모터 |
US10374477B2 (en) * | 2017-03-17 | 2019-08-06 | General Electric Company | Electric machine with separable magnet carrier |
US10804762B2 (en) * | 2018-02-06 | 2020-10-13 | General Electric Company | Electric machine |
CN109462318A (zh) * | 2018-11-06 | 2019-03-12 | 东南大学 | 一种永磁体结构轴向定子无铁芯电机 |
CN113131644A (zh) * | 2019-12-31 | 2021-07-16 | 日本电产株式会社 | 转子铁芯以及具有该转子铁芯的马达 |
US11428160B2 (en) | 2020-12-31 | 2022-08-30 | General Electric Company | Gas turbine engine with interdigitated turbine and gear assembly |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001136721A (ja) * | 1999-08-26 | 2001-05-18 | Toyota Motor Corp | 軸方向間隙型永久磁石同期機 |
JP2006217771A (ja) * | 2005-02-07 | 2006-08-17 | Oita Univ | 永久磁石可動電機 |
JP2006345627A (ja) * | 2005-06-08 | 2006-12-21 | Nissan Motor Co Ltd | 回転電機のロータ構造 |
JP2009011023A (ja) * | 2007-06-26 | 2009-01-15 | Honda Motor Co Ltd | アキシャルギャップ型モータ |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7737594B2 (en) * | 2006-12-01 | 2010-06-15 | Honda Motor Co., Ltd. | Axial gap type motor |
JP4394115B2 (ja) * | 2006-12-26 | 2010-01-06 | 本田技研工業株式会社 | アキシャルギャップ型モータ |
JP2008271640A (ja) * | 2007-04-17 | 2008-11-06 | Honda Motor Co Ltd | アキシャルギャップ型モータ |
JP4961302B2 (ja) * | 2007-08-29 | 2012-06-27 | 本田技研工業株式会社 | アキシャルギャップ型モータ |
US7977843B2 (en) * | 2007-10-04 | 2011-07-12 | Honda Motor Co., Ltd. | Axial gap type motor |
JP4729551B2 (ja) * | 2007-10-04 | 2011-07-20 | 本田技研工業株式会社 | アキシャルギャップ型モータ |
US8049389B2 (en) * | 2008-06-02 | 2011-11-01 | Honda Motor Co., Ltd. | Axial gap motor |
US7906883B2 (en) * | 2008-06-02 | 2011-03-15 | Honda Motor Co., Ltd. | Axial gap motor |
JP4678549B2 (ja) * | 2008-10-09 | 2011-04-27 | 本田技研工業株式会社 | アキシャルギャップ型モータ |
WO2010064510A1 (ja) * | 2008-12-03 | 2010-06-10 | 本田技研工業株式会社 | アキシャルギャップ型モータ及びそのロータ製造方法 |
JP5027169B2 (ja) * | 2009-01-30 | 2012-09-19 | 本田技研工業株式会社 | アキシャルギャップ型モータ及びそのロータ製造方法 |
-
2009
- 2009-01-28 JP JP2009017042A patent/JP5046051B2/ja not_active Expired - Fee Related
- 2009-11-20 DE DE112009004300T patent/DE112009004300T5/de not_active Withdrawn
- 2009-11-20 RU RU2011135822/07A patent/RU2011135822A/ru not_active Application Discontinuation
- 2009-11-20 BR BRPI0924160A patent/BRPI0924160A2/pt not_active Application Discontinuation
- 2009-11-20 WO PCT/JP2009/069748 patent/WO2010087066A1/ja active Application Filing
- 2009-11-20 CN CN200980155539.1A patent/CN102301565B/zh not_active Expired - Fee Related
- 2009-11-20 US US13/145,779 patent/US8304949B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001136721A (ja) * | 1999-08-26 | 2001-05-18 | Toyota Motor Corp | 軸方向間隙型永久磁石同期機 |
JP2006217771A (ja) * | 2005-02-07 | 2006-08-17 | Oita Univ | 永久磁石可動電機 |
JP2006345627A (ja) * | 2005-06-08 | 2006-12-21 | Nissan Motor Co Ltd | 回転電機のロータ構造 |
JP2009011023A (ja) * | 2007-06-26 | 2009-01-15 | Honda Motor Co Ltd | アキシャルギャップ型モータ |
Also Published As
Publication number | Publication date |
---|---|
BRPI0924160A2 (pt) | 2016-02-10 |
RU2011135822A (ru) | 2013-03-10 |
US20110273034A1 (en) | 2011-11-10 |
DE112009004300T5 (de) | 2012-10-04 |
CN102301565A (zh) | 2011-12-28 |
CN102301565B (zh) | 2014-01-15 |
JP2010178472A (ja) | 2010-08-12 |
JP5046051B2 (ja) | 2012-10-10 |
US8304949B2 (en) | 2012-11-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5046051B2 (ja) | アキシャルギャップ型モータ | |
JP4961302B2 (ja) | アキシャルギャップ型モータ | |
JP4394115B2 (ja) | アキシャルギャップ型モータ | |
JP4729551B2 (ja) | アキシャルギャップ型モータ | |
JP4678549B2 (ja) | アキシャルギャップ型モータ | |
JP4707696B2 (ja) | アキシャルギャップ型モータ | |
JP2008271640A (ja) | アキシャルギャップ型モータ | |
JP5083826B2 (ja) | アキシャルギャップ型モータ | |
JP4500843B2 (ja) | アキシャルギャップ型モータ | |
JP4605480B2 (ja) | アキシャルギャップ型モータ | |
JP5292953B2 (ja) | アキシャルギャップ型モータ | |
JP2009095089A (ja) | アキシャルギャップ型モータ | |
JP4671250B1 (ja) | アキシャルギャップ型モータのロータ及びその製造方法 | |
JP5317621B2 (ja) | アキシャルギャップ型モータ | |
JP5280788B2 (ja) | アキシャルギャップ型モータ | |
JP4896690B2 (ja) | アキシャルギャップ型モータ | |
JP5017045B2 (ja) | アキシャルギャップ型モータ | |
JP4911637B2 (ja) | アキシャルギャップ型モータ | |
JP2008271642A (ja) | アキシャルギャップ型モータ | |
JP2010028993A (ja) | アキシャルギャップ型モータ | |
JP2010110163A (ja) | アキシャルギャップ型モータ及びそのロータ製造方法 | |
JP5126584B2 (ja) | アキシャルギャップ型モータ | |
JP2010017009A (ja) | アキシャルギャップ型モータ | |
JP4453051B2 (ja) | アキシャルギャップ型モータ | |
JP2009131113A (ja) | アキシャルギャップ型モータ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980155539.1 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09839255 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13145779 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 5473/CHENP/2011 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112009004300 Country of ref document: DE Ref document number: 1120090043003 Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011135822 Country of ref document: RU |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09839255 Country of ref document: EP Kind code of ref document: A1 |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: PI0924160 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: PI0924160 Country of ref document: BR Kind code of ref document: A2 Effective date: 20110727 |