WO2004017498A1 - アキシャルギャップ型回転電機 - Google Patents
アキシャルギャップ型回転電機 Download PDFInfo
- Publication number
- WO2004017498A1 WO2004017498A1 PCT/JP2003/010389 JP0310389W WO2004017498A1 WO 2004017498 A1 WO2004017498 A1 WO 2004017498A1 JP 0310389 W JP0310389 W JP 0310389W WO 2004017498 A1 WO2004017498 A1 WO 2004017498A1
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- WO
- WIPO (PCT)
- Prior art keywords
- teeth
- magnet
- stator
- rotor
- tooth
- Prior art date
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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
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
- H02K11/05—Rectifiers associated with casings, enclosures or brackets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/12—Bikes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/10—Electrical machine types
- B60L2220/12—Induction machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
- B60L2270/142—Emission reduction of noise acoustic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
- B60L2270/145—Structure borne vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- 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
-
- 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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to an axial gap type rotating electric machine. Background art
- an axial-gap-type electric motor as the axial-gap-type rotating electric machine includes a rotor yoke (rotor-side yoke) having a rotating shaft supported by its bearing and a stator yoke (rotor-side yoke). And the opposing surfaces are orthogonal to the rotation axis.
- a field magnet is disposed in a circular shape (or an annular shape), and on the opposing surface of the stator, a radial direction (radius) with respect to the rotation axis is provided. ),
- the magnets and the teeth face each other at right angles to the axis of rotation, and the gap between the opposing faces is perpendicular to the axis of rotation. It is formed in a flat shape.
- a magnetic circuit is formed between the rotor and the stator, and excitation for each tooth is performed through a coil wound around each tooth of the stator, and the N pole of the rotor magnet
- the rotor is rotated by utilizing the attraction and repulsion of the rotor-side magnet with respect to the excitation of each tooth.
- the magnet and the tooth have a structure in which the mutually facing surfaces are orthogonal to the rotation axis, so that the radial gap type rotating electric machine, that is, the magnet
- the length along the direction of the rotating shaft can be made shorter than that of a rotating electrical machine in which the opposing surfaces of the teeth and the teeth are parallel to the rotating shaft, contributing to the thinning of the rotating electrical machine. be able to.
- some of the radially arranged teeth in the axial-gap type rotating electric machine have some of the teeth arranged adjacent to each other (for three-phase AC).
- a motor drive controller / driver driver
- Space for installing the magnetic poles (N pole, S pole) of the magnet on the side of the rotor, and space for the position detection sensor (Hall element, etc.) it is possible to reduce the size of devices and systems equipped with an axial-gap type rotating electric machine by utilizing them for coil connection and space for forming inverter terminals.
- the rotor Due to the unbalance state of the suction force and the internal clearance between the rotating shaft of the rotor and the bearing, the rotor has a wide gap with respect to the missing teeth in the stator, and the rotor has a wide gap. It is inclined so that the gap with respect to the opposing portion with respect to the rotating shaft is narrowed.
- This inclination of the rotor increases the noise Z vibration generated due to the rotating operation of the rotating electric machine, and further increases the loss at the rotating shaft of the rotor and the gear connected to the bearings. As a result, there is a fear that the practicality of the axial gap type rotating electric machine (for example, mounting on an electric vehicle Z electric motorcycle, etc.) may be hindered.
- the present invention has been made in view of the above-mentioned circumstances, and has a structure in which a part of a tooth of a stator is missing.
- An object of the present invention is to suppress the inclination of a rotor caused by a tooth defect in a short-gap type electric motor.
- a first aspect of the present invention for achieving the above object is an axial gap type rotating electric machine that rotates a rotor having a rotating shaft and a field magnet supported by a bearing, wherein the rotating machine comprises: A stator-side yoke disposed opposite to the stator; and a substantially notched circle having a predetermined point on a center axis of the bearing as a center point on a surface of the stator-side yoke facing the magnet. And a plurality of teeth facing the magnet with a predetermined gap therebetween, and first and second teeth on both sides of the cutout portion in the plurality of teeth.
- a second aspect of the present invention for achieving the above object is an axial gap type rotating electric machine that rotates a rotor having a rotating shaft and a field magnet.
- a stator-side yoke disposed opposite to the stator-side yoke and a substantially notched circle having a center point at a predetermined point on a center axis of the rotating shaft on a surface of the stator-side yoke facing the magnet; And a plurality of teeth opposed to the magnet with a predetermined gap therebetween, and a circumferential pitch between the plurality of teeth is changed by an attractive force of the magnet to the notched portion.
- a third aspect of the present invention for achieving the above object is an axial gap type rotating electric machine that rotates a rotor having a rotating shaft and a field magnet, A stator-side yoke opposed to the rotor, and a substantially notched circular shape centered on the center axis of the rotation shaft on a surface of the stator-side yoke facing the magnet.
- a plurality of teeth facing the magnet with a predetermined gap therebetween, and an area of a surface of the plurality of teeth facing the magnet is determined by the area of the magnet facing the notch portion.
- the suction force is uneven so as to increase.
- a fourth aspect of the present invention for achieving the above object is an axial gap type rotating electric machine that rotates a rotor having a rotating shaft and a field magnet.
- a plurality of teeth opposed to the magnet with a predetermined gap therebetween, and the center of the rotation axis of the rotation shaft is notched with respect to the center point of the notch circle. It is eccentric away from the part.
- a fifth aspect of the present invention for achieving the above object is an axial gap type rotating electric machine that rotates a rotor having a rotating shaft and a field magnet, and is opposed to the rotor.
- a notched annular stator-side yoke and a substantially notched circular shape centered on the center axis of the bearing are disposed on a surface of the stator-side yoke facing the magnet.
- the first and second teeth on both sides of the cutout portion in the plurality of teeth are provided.
- the magnet facing surfaces of the first and second teeth are inclined in a direction approaching the magnet.
- the gap for the magnet on the side of the notch portion can be made narrower than the gap for the magnet on the side opposite to the side of the notch portion via the center axis. Attraction force of the magnet to the notch side and the notch It is possible to reduce the imbalance (unbalance) between the magnetized portion and the attraction force of the magnet with respect to the opposite side via the central axis.
- the circumferential pitch between the plurality of teeth is increased so that the attractive force of the magnet to the notched portion is increased.
- the uneven force between the attractive force of the magnet to the notch portion and the attraction force of the magnet to the opposite side of the notch portion through the center axis. (Unbalance) can be reduced.
- the area of the surface facing the magnets of the plurality of teeth is reduced by the attractive force of the magnet to the notched portion. Because of the non-uniformity of increase, the force of attraction of the magnet to the notch portion side and the force of the magnet to the side opposite to the notch portion side and the center axis through the central axis line. Unbalance (unbalance) can be reduced. As a result, it is possible to suppress the inclination of the rotor to the side opposite to the notch portion side via the central axis, which is caused by the imbalance of the suction force. Loss can be reduced.
- the center of the rotating shaft of the rotor is notched with respect to the center of the notched circle of the plurality of teeth. It is eccentric away from the notch.
- the notch of the stator-side yoke is provided. Are connected by the connecting yoke, the two teeth near the notch can be maintained as a magnetic circuit.
- FIG. 1 is a side view of an electric motorcycle which is an example of a device equipped with an axial gear type rotating electric machine according to the first embodiment of the present invention.
- FIG. 2 is a cross-sectional view (partial side view) taken along the line II-II in FIG. 1 for explaining the inside of the rear end of the rear arm shown in FIG.
- Fig. 3 is a view from the rear wheel side of the stator in use, which is attached to the rear end of the rear arm as part of the electric motor of the motorcycle shown in Figs. 1 and 2.
- FIG. 3 is a view from the rear wheel side of the stator in use, which is attached to the rear end of the rear arm as part of the electric motor of the motorcycle shown in Figs. 1 and 2.
- FIG. 4 is a perspective view showing a schematic configuration of a main part of the stator shown in FIG.
- FIG. 5 shows a plane including first and second points on the magnet-facing surface of the first and second teeth and a third point on the magnet-facing surface of the third tooth.
- FIG. 4 shows a simplified view of a state in which the bearing is inclined from a direction perpendicular to the center axis of the bearing.
- Figure 6 shows the first and second points on the magnet facing surface of the first and second teeth and the first and second points on the magnet facing surface of the third tooth.
- FIG. 7 is a diagram comparing lost losses with.
- FIG. 7 is a perspective view showing a schematic configuration of a stator of an electric motor according to a second embodiment of the present invention.
- FIG. 8 is a plan view showing a schematic configuration when the stator of the electric motor according to the third embodiment of the present invention is viewed from the rear wheel side.
- FIG. 9 is a plan view showing a schematic configuration when the stator of the electric motor according to the fourth embodiment of the present invention is viewed from the rear wheel side.
- FIG. 10 is a plan view showing a schematic configuration when an electric motor according to a fifth embodiment of the present invention is viewed from the rear wheel side in the evening stator.
- FIG. 11 is a diagram schematically showing the relationship between the magnets of the electric motor shown in FIG. 10 and the teeth of the stator.
- FIG. 12 is a plan view showing a schematic configuration when the stator of the electric motor according to the sixth embodiment of the present invention is viewed from the rear wheel side.
- FIG. 13 is a diagram schematically showing the relationship between the magnets of the electric motor shown in FIG. 12 and the teeth of the stator.
- FIG. 14 is a plan view showing a schematic configuration of an electric motor according to a seventh embodiment of the present invention when the evening stator is viewed from the rear wheel side.
- FIG. 14 is a plan view showing a schematic configuration of an electric motor according to a seventh embodiment of the present invention when the evening stator is viewed from the rear wheel side.
- FIG. 15 is a diagram schematically showing the relationship between the magnets of the electric motor shown in FIG. 14 and the teeth of the stator.
- FIG. 16 is a perspective view showing a schematic configuration of a stator according to a modification of the present invention. .
- FIG. 1 is a side view of an electric motorcycle 1 which is an example of a device equipped with an axial gap type rotating electric machine according to a first embodiment of the present invention.
- the electric motorcycle 1 is provided with a head pipe 2 at an upper front portion of the vehicle body, and a steering shaft (not shown) for changing the vehicle body direction is provided in the head pipe. It is freely rotatable.
- a handle support 3 to which the handle 3a is fixed is attached to the upper end of the steering shaft, and a grip is provided at both ends of the handle 3a.
- Step 4 is installed.
- the grip 6 on the right side (rear side in FIG. 1), not shown, constitutes a rotatable throttle grip.
- a pair of left and right front forks 5 are attached downward from the lower end of the head pipe 2.
- the front wheel 6 has a front axle.
- the front wheel 6 is rotatably supported by a front axle 7 while being suspended by a front fork 5.
- a handle 8 is arranged in front of the handle 3 a of the handle support 3, and a head lamp 9 is fixed below the handle 8 of the handle support 3.
- a flash lamp 10 (only one is shown in FIG. 1) is provided on each side of the head lamp 9.
- a pair of left and right body frames 11 each forming an approximately L shape in side view extend from the head pipe 2 toward the rear of the body.
- the body frame 11 has a round pipe shape, extends diagonally downward from the head pipe 2 toward the rear of the vehicle body, and then extends horizontally toward the rear to be substantially L-shaped in side view. Is established.
- a pair of left and right seat rails 12 extend diagonally upward from the rear end toward the rear from the rear end of the pair of vehicle body frames 11.
- the rear end 12 a of the seat rail 12 is bent rearward along the shape of the seat 13.
- a battery 14 is detachably disposed between the pair of left and right seat rails 12.
- the battery 14 stores a plurality of rechargeable batteries. It is composed of
- a U-shaped seat stay 15 is welded to the front of the vehicle, inclined and upwardly inclined, and the above-mentioned seat is surrounded by the seat stay 15 and the left and right seat rails 12.
- the seat 13 is openable and closable, that is, is arranged to be rotatable up and down via the front end of the seat 13.
- the rear end of the seat rail 12 is provided with a rear hanger 16, and the rear end of the rear hender 16 is provided with a till lamp 17. ing.
- a flash lamp (only one is shown in FIG. 1) 18 is attached to the left and right of the tile lamp 17.
- a rear arm bracket 19 (only one is shown in FIG. 1) is welded to a lower horizontal portion of the sheet 13 of the pair of left and right body frames 11.
- the front end of the rear arm 20 is swingably supported on the lower arm bracket 19 via a pivot shaft 21.
- a rear wheel 22 which is a drive wheel is rotatably supported at the rear end portion 20a of the rear arm 20.
- the rear wheel 20 and the rear wheel 20 are rotatably supported. 22 is buffered by a suspension 23.
- a pair of left and right footsteps 24 (only one is shown in FIG. 1) are provided below the horizontal portion of the pair of left and right body frames 11, respectively.
- a side stand 25 is rotatably supported by a left rear arm 20 via a shaft 26. The stand 25 is urged to the closing side by the return spring 27.
- An axial gap type electric motor 28 (hereinafter simply referred to as an electric motor) connected to the rear wheel 22 and for rotating the wheel 22 thereafter is provided in a rear end portion 20 a of the rear arm 20.
- FIG. 2 is a cross-sectional view (partial side view) taken along the line II-II in FIG. 1 for explaining the inside of the rear end portion 20a of the rear arm 20.
- the rear wheel 22 is not shown.
- a gear cover 35 is attached to the right side surface of the rear end portion 20a of the rear arm 20, and a drive unit is provided in a space formed therein.
- An electric motor 28, a planetary gear reducer 36, a controller 37, and the like that constitute 29 are integrally incorporated.
- the axial gap type electric motor 28 is connected to the rear end 20 a of the rear arm 20 via the bearings 38 a and 38 b via the bearing 38 a.
- a, 38b, a rotor (rotor) 40 supported rotatably about the center axis BO, and an inner surface of the rear end portion 20a of the rear arm facing the rotor 40. It has a substantially annular (doughnut) -shaped stator (steering station) 4 1 and 4.
- the rotor 40 has a rotor-side yoke 42, and the rotor-side yoke 42 has a rear arm 20. It has a generally piece-like shape that protrudes toward the rear end portion 20a. That is, the rotor-side yoke 42 includes an annular annular portion 42 a facing the stator 41, and a rear end of the rear arm 20 from an inner peripheral edge of the annular portion 42 a. A tapered portion 42b extending in a substantially tapered shape (substantially frustoconical shape) toward 20a, and a rear end portion of the rear arm of the tapered portion 42b from a peripheral edge of the 20a side.
- a first cylindrical portion 42c extending convexly along the center axis B0 toward the end portion 20a, and a rear end portion 20a side peripheral portion of the rear arm of the cylindrical portion 42c. And an annular portion 42 d extending radially inward from the inner periphery of the annular portion 42 d toward the rear end 20 a along the central axis B ⁇ . And a second cylindrical portion 42 e extending convexly.
- the second cylindrical portion 42 e is rotatably supported about a central axis BO via force bearings 38a and 38b, and constitutes a rotating shaft of the rotor 40. are doing. Therefore, the center of the rotating shaft of the rotating shaft 42 e of the rotor 40 corresponds to the center axis B O of the bearings 38 a and 38 b.
- the rotor 40 is fixed to the stator-side facing surface of the annular portion 42a of the rotor-side yoke 42, and has an annular shape coaxial with the center axis BO.
- Field magnets (magnets) 45 are provided.
- the magnet 45 has N poles and S poles alternately arranged along the circumferential direction.
- a rotating shaft 46 is connected coaxially with the rotor 40 (rotating shaft 42 e) at the rear wheel end of the rotating shaft 42 e of the rotor 40.
- the shaft 46 is rotatable together with the rotor 40.
- the planetary gear reducer 36 is connected to the rotating shaft 46 and is incorporated in the tapered portion 42 b of the rotor side yoke 42.
- the planetary gear reducer 36 and the electric motor 28 partially overlap in the vehicle width direction.
- the planetary gear reducer 36 is connected to a rear axle 47 arranged coaxially with the rotating shaft 46, and reduces the rotation of the electric motor 28 (rotation of the rotating shaft 46). It has the function of transmitting to the rear axle 47.
- a nut 50 is detachably screwed to a tip portion 47a of the rear axle 47 protruding from the gear canopy 35, and the rear wheel 22 is fitted to the rear axle 47. In this state, nuts 50 are attached by screwing.
- FIG. 3 shows a state of use in which the rear end 20a of the rearm 20 is mounted as a part of the electric motor 28 of the motorcycle 1 shown in Figs. 1 and 2.
- FIG. 4 is a diagram showing a state of the stator 41 viewed from the rear wheel side.
- the stator 41 is fixed to the rear end 20a of the rear arm 20 and extends along the center axis B ⁇ of the bearings 38a and 38b.
- a substantially notched circular (annular) (substantially C-shaped) steel plate at the center is laminated along the center axis direction.
- the plurality of teeth 61 are arranged such that a point (center point) BC on the center axis B0 of the bearings 38a, 38b is provided on the surface of the stator yoke 60 facing the magnet 45. It is arranged in a notched circular shape (substantially C-shaped) at the center.
- the “notched circle (circle)” in the present embodiment means a substantially true circle or a substantially elliptical shape with a part cut out.
- the plurality of teeth 61 arranged in a substantially notched circle (substantially C-shape) in the present embodiment are arranged at a fixed interval (circumferential pitch) along the circumferential direction on the stator side.
- three teeth (U-phase, V-phase, .W-phase) correspond to the case where a plurality of teeth 61 are arranged in a perfect circle. Three teeth are missing.
- the plurality of teeth 61 each have a substantially rectangular upper surface when viewed from the rear wheel side. On the other hand, it is inserted and fixed to the stator-side yoke 60 so that its upper surface has the same height.
- the circumferential pitch is defined as the center of the center of the bearings 38a and 38b on the center of the bearings 38a and 38b from the center of the adjacent tooth 61 and the center of the respective magnet facing surface.
- Point BC Represents the angle between the line segments connecting.
- the stator 41 also controls the coil 62 wound around each tooth 61 (see FIG. 2), the yoke 60, each tooth 61 and the coil 62.
- a molded part 63 which is integrally molded together, and a plurality of molded parts formed on the outer peripheral surface of the molded part 63, including the teeth 61 and the coils 62.
- a flange 64 for attaching the rear arm 20 to the rear end 20 a of the rear arm 20.
- the flange 64 is connected to the rear end 20 a of the rear arm 20 by a port.
- the screw is provided by gut 65.
- the notch portion (the tooth missing portion) TW of the stator-side yokes 60 and the teeth 61 has a controller.
- the first and second teeth 61 a1 and 61 on both sides of the cutout portion TW in the plurality of teeth 61 are provided. 1st and 2nd points P 1 and P 2 on the magnet facing surface of 1 a 2 And the middle point CP between the first and second teeth 61 a1 and 61 a2 (between the first and second points P 1 and P 2), and A third tooth 61a3 which is located on the opposite side of the center axis BO of the bearings 38a and 38b and is closest to the plane H including the center point CP and the center axis BO.
- the plane containing the third point P 3 and the third point P 3 on the magnet-facing surface of the first and second points, respectively, is the first and second points from the vertical direction X with respect to the center axis B of the bearings 38 a and 38 b.
- P1 and P2 are inclined so that they are, for example, approximately 0.2 mm higher than the third point P3.
- the stator side tip 60 is replaced by the first and second teeth 61 a1 and 61 a2 by the third tooth.
- the first and second points P 1 and P 2 and the third point P 3 are respectively tilted so as to be closer to the stator facing surface F side of the magnet 45 than to 6 1 a 3.
- the included plane is inclined with respect to the vertical direction X.
- the two flanges 6 located on the upper side 4a1 and 64a2 are arranged so as to be substantially symmetrical with respect to a line L passing through the uppermost point M1 and the lowermost point M2 in a state where the stator 41 is mounted.
- stator side The notched portions of the shaft 60 are connected to each other at the opposite inner peripheral portions of both ends 60a1 and 60a2 on the TW side by connecting yokes 75.
- a magnetic circuit is formed between the rotor 40 and the stator 41, and the magnetic flux emitted from the N pole of the magnet 45 of the rotor 40 is formed. Flows from the tooth 61 to the stator side yoke 60, and then flows to the S pole of the magnet 45 through the other teeth 61.
- the first and second teeth 61 on both sides of the notched portion TW are arranged.
- the first and second points P 1 and P 2 on the magnet-facing surface F of the teeth 6 1 a 1 and 6 1 a 2 and the first and second teeth 6 1 a 1 and 6 It is on the opposite side of the center point CP of the bearings 38a and 38b with respect to the midpoint CP between 1a2, and is closest to the plane H including the midpoint CP and the center axis BO.
- the above first and second steps are not performed.
- the first and second points P 1 and P 2 of the second teeth 61 a 1 and 61 a 2 and the third point P 3 of the third tooth 61 a 3 are substantially shorter than the third point P 3 from the vertical direction X with respect to the center axis B of the bearings 38 a and 38 b, respectively.
- the gap between the notch TW side and the central axis BO is aligned with the stator 45 facing the stator 45 of the magnet 45 on the notch TW side because it is inclined to be 0.2 mm higher.
- the gap between the magnet 45 on the side opposite to the stator and the gap with respect to the stator facing surface F can be narrowed.
- the excited teeth 61 are sequentially moved.
- the rotor 40 can be rotated together with the magnet 45.
- the rotor 40 is moved to the teeth 61 a3 side of the rotor 40, that is, to the side opposed to the notch portion TW via the central axis B ⁇ . Since the inclination is suppressed, the vibration Z noise based on the rotating operation of the rotor 40 can be reduced.
- the rotor 40 rotates to the motor shaft portion 42 e of the rotor 40. It is possible to reduce the loss in the gear section (the planetary gear reducer 36 etc.) connected via the shaft 46.
- the stator-side yoke 60 is formed in a substantially annular shape in order to secure bearing space for the bearings 38a and 38b of the rotor 40, and furthermore, to further improve the circularity.
- a part of the ring is cut off to form a notch circle (ring), and the controller 37 and the like are arranged in the notch TW to reduce the size.
- the notched portions of the stator-side yoke 60 are connected to each other at the opposite inner peripheral portions of the TW-side end portions 60a1 and 60a2 by the connection yoke 75. ing.
- the connection yoke 75 since the magnetic circuit between the teeth 61a1 and 61a2 near both sides of the cutout portion TW is cut off, the teeth 6 The magnetic flux passing through 1a1 and 61a2 may be reduced, causing a decrease in torque.
- the notched portions of the stator-side yoke 60 and the opposite inner peripheral portions of the TW-side end portions 60a1 and 60a2 are connected to the connecting yoke 75.
- the magnetic circuit between the teeth 61a1 and 61a2 near both sides of the cutout portion TW can be maintained.
- the magnetic field passing between the teeth 61 a1 and 61 a2 near both sides of the cutout portion TW is secured while securing the arrangement space for the controller 37 and the like.
- the bundle can be prevented from lowering and the torque can be prevented from decreasing.
- Fig. 6 shows the first and second points P1 and P2 on the magnet facing surfaces of the first and second teeth 61a1 and 61a2 and the third tooth. 6 Configuration in which the third point P 3 on the magnet-facing surface of 1 a 3 is on the same plane (no inclination) Loss LO1 obtained when an electric motor having the following characteristics is used, and the configuration according to the first embodiment of the present invention (first and second teeth 61a1 and 61a2).
- a plane including the first and second points P 1 and P 2 on the magnet facing surface of the third tooth and the third point P 3 on the magnet facing surface of the third tooth 61 a3 respectively is defined by the Loss L obtained by using an electric motor 28 having a configuration in which the first and second points P 1 and P 2 are inclined to be approximately 0.2 mm higher than the third point P 3).
- Figure 2 shows a comparison of 2 with (the vertical axis represents the loss (% :)).
- the loss L 0 2 when the electric motor 28 according to the first embodiment of the present invention is used is the loss when the electric motor without a tilt is used. This is about 10% lower than that of L 01, and the effect of the configuration of the present embodiment (inclined configuration) was proved.
- the two flanges 64 al and 64 a 2 located on the upper side are fixed. It is disposed so as to be substantially symmetrical with respect to a line L passing through the uppermost point M1 and the lowermost point M2 in the mounting state of the child 41.
- the two flanges 64a1 and 64a2 are separated from the uppermost point Ml and the uppermost point M1 and the lowermost point M2 are separated from each other.
- the shock load can be distributed to the two flanges 64al and 64a2 because they are arranged so as to be substantially symmetrical with respect to the passing line L.
- FIG. 7 is a perspective view showing a schematic configuration of a stator 41A of an electric motor according to a second embodiment of the present invention.
- the description of the other components will be omitted or simplified.
- the first and second teeth 61a1a1 are provided without inclining the stator side yoke 60.
- the first and second points P 1 and P 2 on the magnet-facing surface of 61 a 2 and the third point P 3 on the magnet-facing surface of the third tooth 61 a 3 In order to incline the plane S 1 containing each of them so that the first and second points P 1 and P 2 are higher than the third point P 3, a plurality of teeth 61 are used.
- the first and second teeth 61a1 and 61a2 are formed so as to be stepped from the tooth 61a3 toward the first and second teeth 61a1 and 61a2.
- a plurality of teeth 6 la 3, 61 akl, 61 ak 2 from the third tooth 6 la 3 to the first tooth 61 a 1 are provided.
- the height of each of 6 1 ak 6> 6 1 a 1 is the lowest of the third tooth 61 a 3, and hereinafter, the height of the first tooth 61 a 1
- the height of the first tooth 61 a1 becomes the highest (the height of the third tooth 6 la3 is 6 1 akl). Height ⁇ ⁇ ⁇ ⁇ height of tooth 6 1 ak 6 ⁇ height of first tooth 61 a 1).
- a plurality of teeth 61 a3, 61 aml, and 61 a from the third tooth 61 a3 to the second tooth 61 a1.
- the height of each of 1 am 2, 6 1 am 6 61 a 1 is the lowest of the third tooth 61 a 3, and the following is the second tooth 6 la
- the height of the second tooth 6 la 2 becomes the highest (the height of the third tooth 6 1 a 3 ⁇ the height of the tooth 6 1).
- the height of ami ⁇ 1 ⁇ The height of the first tooth 61 a 2, which is the height of the tooth 61 1 am 6).
- the first and second points P 1 and P 2 on the magnet facing surfaces of the first and second teeth 61 a 1 and 61 a 2 and the third point Teeth 6 The plane H including the third point P3 on the magnet-facing surface of 1a3 is inclined such that the first and second points P1 and P2 are higher than the third point P3. Therefore, the imbalance (unbalance) of the attraction force of the rotor magnet 45 to the stator 41 as in the first embodiment can be reduced.
- the height of each of the plurality of teeth 61 is changed from the third tooth 61 a3 to the first and second teeth 61 a1 and 6. Since it is formed so as to be stepped upward toward 1a2, it is possible to finely adjust the difference in height between adjacent teeth. As a result, it is possible to further contribute to reducing the imbalance (unbalance) of the attraction force to the teeth 61 by the magnet 45.
- FIG. 8 is a plan view showing a schematic configuration when the stator 41 B of the electric motor according to the third embodiment of the present invention is viewed from the rear wheel side.
- the description of the other components will be omitted or simplified.
- the stator 41 B of the present embodiment a method different from the first and second embodiments, that is, by making the circumferential pitch between the plurality of teeth 61 non-uniform.
- the imbalance (unbalance) of the attractive force to the teeth 61 by the magnets 45 is reduced.
- a plurality of teeth 61a3, 61aml from the third tooth 61a3 to the second tooth 61a2 are provided.
- '*' A line connecting the center of each magnet facing surface of 61 am 6 and 61 a 2 and the center axis B 0 of the bearings 38 a and 38 b from the center along the facing surface , V8, V2, ..., V8, each circumferential pitch between a plurality of teeth 61 defined by the angle between adjacent line segments in these line segments VI to V8.
- 0 t in the figure denotes a plurality of teeth 61 a3, 61 ami,-3, from the third tooth 61 a3 to the second tooth 61 a2.
- 61 am 6, and 61 a2 represent the uniform circumferential pitch when the circumferential pitch is arranged.
- a plurality of teeth 6 1 a 3, 6 1 ak 1, 6 1 ak 6, 6 lal from the third tooth 61 a 3 to the first tooth 6 lal The same applies to the case of a plurality of teeth 61a3 to 61a2 for each circumferential pitch, and a difference between the third teeth 61a3 and 61akl.
- the pitch in the circumferential direction is the narrowest, and thereafter, it gradually increases as it goes to the first tooth 61 a1, and the tooth 61 ak 6 and the first tooth 6 lal
- the circumferential pitch between the two is the widest.
- a plurality of teeth 61 are arranged more than a case where a plurality of teeth 61 are arranged at an equal circumferential pitch ⁇ t. , It can be closer to the notch position TW.
- the remaining teeth 6 1 a 1, 6 1 akl to 6 1 ak 6, 6 1 a 2, 6 1 aml to 6 1 am 2, other than the third tooth 6 3 a 3 By expanding the circumferential pitch, it is possible to deviate in the direction of the notch TW.
- the distribution of the plurality of teeth 61 as a whole that is, the distribution of the steel plate (iron) on the stator side yoke 60 is increased toward the notch portion TW, and the opposite of the teeth 6 is increased. It can be reduced to 1a3 side.
- the attraction force of the magnet 45 toward the notch TW can be increased by the amount of the steel plate (iron) on the stator-side yoke 60, and conversely. Since the attractive force of the magnet 45 to the side of the teeth 61a3 can be reduced, the side facing the cutout portion TW via the central axis B0 (the teeth 61) a 3 etc.), the imbalance (unbalance) of the attractive force of the magnet 45 against the magnet 45 can be reduced, the inclination of the rotor 40 caused by the imbalance of the attractive force is suppressed, and the noise And loss can be reduced.
- the circumferential pitch between the plurality of teeth 61 is changed from the third tooth 6 la 3 to the first and second teeth 61 a.
- the present invention is not limited to this configuration, and the entirety of the plurality of teeth 61 is distributed to the notch portion TW side. Any non-uniform pitch as long as it can increase the attraction force of the magnet 45 to the notch TW side It may be.
- FIG. 9 is a plan view showing a schematic configuration when the stator 41C of the electric motor according to the fourth embodiment of the present invention is viewed from the rear wheel side.
- the description of the other components will be omitted or simplified.
- stator 41 C of the present embodiment as a method of changing the distribution of the steel plate (iron) on the stator side yoke 60, the area of the magnet facing surface of the plurality of teeth 61 is determined. By making it uneven, the unbalance (unbalance) of the attraction force to the tooth 61 by the magnet 45 is reduced.
- the plurality of teeth 61 a3, 61 a from the third tooth 61 a3 force to the second tooth 61 a2 are provided.
- am 1 The area SI, S 2,..., S 8 of the magnet-facing surfaces of 6 la and 6 la 2 is calculated from the third tooth 6 1 a 3 to the first And gradually increase toward the second tooth 61 a1.
- a plurality of areas from a third tooth 61 a3 to a second tooth 61 a2 are provided.
- each magnet facing surface S 1, S 2, S, S 8 width of the facing surface W l, W 2,, W 8 indicates that the third tooth 61 a3 is the smallest (shorter), and then gradually widens (longer) toward the second tooth 61 a2.
- the area S 8 (the width W 8 of the facing surface) of the magnet facing surface of lath 6 la 2 becomes the widest (longest) ⁇
- the magnet facing surface area S 1 (the width W 1 of the magnet facing surface) ⁇
- Magnet-facing surface area S 2 (magnet-facing surface width W 2) Small magnet facing surface area S 7 (magnet-facing surface width W 7) ⁇ magnet facing surface area S 8 (magnet-facing surface width W 8 ) ⁇ .
- the area of each magnet-facing surface of lal (the width of the magnet-facing surface) is the same as in the case of the multiple teeth 61a3 to 61a2.
- the area of the magnet-facing surface (width of the magnet-facing surface) of a3 is the smallest (shorter), and then becomes wider (longer) as it moves toward the first tooth 61a1.
- the area of the magnet facing surface of the first tooth 6 la 1 (the width of the magnet facing surface) is the widest ( Long)
- the areas of the magnet facing surfaces 1a1 and 61a2 are the largest.
- the distribution of the plurality of teeth 61 as a whole that is, the distribution of the steel plate (iron) on the stator side yoke 60 is increased toward the notch portion TW side, and the opposite tee is performed. 6a 3a can be reduced.
- the attraction force of the magnets 4.5 to the notch portion TW side is increased by the increased amount of the steel plate (iron) on the stator side yoke 60. It is possible to decrease the attractive force of the magnet 45 to the teeth 61a3 side, and conversely, through the notch portion TW side and the center axis BO. Of the attractive force of the magnet 45 against the opposite side (teeth 61 a 3, etc.) The imbalance (unbalance) can be reduced, the inclination of the rotor 40 caused by the imbalance of the suction force can be suppressed, and the vibration Z noise and loss can be reduced.
- the magnet-facing surfaces of the plurality of teeth from the third tooth 61 a3 to the first and second teeth 61 a1 and 6 la2 are respectively set.
- a specific method for increasing the area a plurality of teeth from the third tooth 61 3 to the first and second teeth 61 a 1 and 61 a 2 are used.
- the width in the short direction of each magnet facing surface was sequentially increased, the present invention is not limited to this, and the first and second tees from the third tooth 6 la 3 are shown.
- the width of the magnet facing surface in the longitudinal direction or the deformation of the magnet facing surface may be used.
- the area of the magnet facing surface of each of the plurality of teeth 61 is increased from the third tooth 61 a3 toward the first and second teeth 61 a1.
- the present invention is not limited to this configuration, and the entire distribution of the plurality of teeth 61 is increased to the notch portion TW side.
- any unevenness in the area can be reduced as long as it can be reduced to the opposite side of the tooth 61a3 to increase the attractive force of the magnet 45 to the notch TW side. included.
- FIG. 10 is a plan view showing a schematic configuration of an electric motor according to a fifth embodiment of the present invention, when the evening stator 41 D is viewed from the rear wheel side. Note that, in the present embodiment, only the configuration of the stator 41 in the first embodiment is different, and the description of the other components will be omitted or simplified.
- reference numeral OA 1 denotes the center of a plurality of teeth 61 arranged in a notched circle (the center of a circle connecting the centers OT of the respective magnet-facing surfaces of the plurality of teeth 61).
- the symbol OA 2 represents the center of the rotating shaft of the rotating shaft 42 e of the rotor 40 (the center axis B ⁇ of the bearings 38 a and 38 b). Corresponds to the center.
- a first radial direction between the inner surface 61 c of each of the teeth 61 and the center OA 1 of the notch circle is provided.
- the distance L 1 and the length R 1 of the inner diameter of the toroidal magnet 45 substantially match, and the radius between the outer peripheral surface 61 d of each tooth 61 and the center OA 1 of the notch circle
- the second distance L 2 along the direction and the length R 2 of the outer diameter of the annular magnet 45 substantially match.
- the center OA 1 of the plurality of teeth 61 arranged in a notched circle is connected to the rotation axis of the rotor 40.
- the center of the rotation axis of 4 2 e (the center of the annular magnet 45) 0 A 2 and the notch position TW are, for example, the center of the rotation axis of the rotation axis of the rotor 40 2 e A 2 It is eccentric in the radial direction so as to be away from it.
- the notch TW side teeth (teeth 6) are cut from the rotation axis center O A2 (center axis B O) of the rotor 40.
- the distance LX 1 from the center axis BO passing through the rotation axis center OA 2 of the rotor 40 to the teeth on the side of the notch portion TW is set as the notch portion TW. Since the distance LX2 to the teeth on the opposite side across the center axis B ⁇ can be longer than LX2, the lack of magnetic force due to the missing teeth on the notch TW side can be reduced. This can be offset by an increase in the distance of the notch site TW to the tooth as described above.
- the cutout from the rotation axis center OA2 (central axis line BO) of the rotor 40 is performed based on the attraction force of the magnet 45A to the plurality of teeth on the TW side. It is possible to balance the moment based on a plurality of teeth facing the notch portion TW with the central axis line BO interposed therebetween. As a result, it is possible to suppress the inclination of the rotor 40 to the side opposite to the notch portion TW across the central axis B O, and reduce vibration / noise and loss.
- FIG. 12 is a plan view showing a schematic configuration of an electric motor according to a sixth embodiment of the present invention when the evening stator 41 E is viewed from the rear wheel side.
- the structure of the rotor described in the fifth embodiment is different.
- the inner peripheral surface 61 c of each tooth 61 and the center ⁇ A 1 of the notched circle The length R 1 of the inner diameter of the toroidal magnet 45 A is made shorter than the first distance L 1 along the radial direction between them, and the length R 2 of the outer diameter of the toroidal magnet 45 is set to each tee. 6 1 d and the center of the notched circle OA 1 Is longer than a second distance L 2 along the radial direction between the two.
- the center OA 1 of the plurality of teeth 61 arranged in a notched circle and the rotor 40 are also provided.
- the center of rotation of the rotary shaft 42 e of the rotary shaft (the center of the annular magnet 45 A) OA 2 is the center of the rotary shaft of the rotary shaft 42 e of the rotor 40. It is eccentric along the radial direction away from A2.
- a tooth (not shown) at the notch TW side from a center line (center axis B 0) passing through the center axis OA 2 of the rotor 40 is shown.
- the distance LX 1 to a predetermined position (for example, center 0 T) of each of the teeth 61 a 1, 61 a 2, etc. is determined by setting the distance between the notch portion TW and the tooth on the side opposite to the center axis BO. For example, the length can be increased with respect to the distance LX2 of the tooth 61a3 with respect to the corresponding predetermined position (center OT).
- the distance LX 1 from the center axis B ⁇ passing through the rotation axis center OA 2 of the rotor 40 to the teeth on the notch portion TW side is determined.
- the length of the notch portion TW and the distance LX 2 to the tooth on the side opposite to the center axis line BO can be increased, so that the notch portion TW was caused by the tooth lack on the side. Insufficient magnetic force is detected by the notch TW This can be offset by increasing the distance to the ground.
- the inner diameter R 1 of the annular magnet 45 A is larger than the first distance L 1 between the inner surface 61 c of each tooth and the center OA 1 of the notch circle.
- the outer diameter R 2 of the annular magnet 45 A is longer than the second distance L 2 between the outer peripheral surface 61 d of each tooth and the center OA 1 of the notch circle.
- the magnet facing surfaces of all the teeth 61 are completely opposed to the magnet 45A as shown in Fig. 12 (all the tees are within the annular area of the magnet 45A).
- the position of the rotor 61 can be positioned, and the inclination of the rotor 40 can be suppressed without reducing the amount of magnetic flux (reducing the torque).
- FIG. 14 is a plan view showing a schematic configuration of the electric motor according to the seventh embodiment of the present invention when the evening stator 41 F is to be viewed from the rear wheel side.
- the first The structure of the rotor described in the fifth embodiment or the sixth embodiment is different.
- the inner diameter length R 1 of the annular magnet 45 B is notched with the inner surface 61 c of each tooth 61. Approximately coincides with the first distance L 1 along the radial direction between the center OA 1 of the circle and the outer diameter R 2 of the annular magnet 45 B and the outer circumference of each tooth 61. It is longer than the second distance L 2 along the radial direction between the side surface 61 d and the center ⁇ A 1 of the notch circle.
- the center OA 1 of the plurality of teeth 61 arranged in a notched circle and the rotor 40 are also provided.
- the center of the rotating shaft of the rotary shaft 4 2 e (the center of the toroidal magnet 45 B) 0 A 2, for example, the notch TW is the center of the rotating shaft of the rotor 40 2 e. It is eccentric along the radial direction away from 0 A2.
- the center line (center axis line B ⁇ ) passing through the center of the rotation axis ⁇ ⁇ A 2 of the rotor 40 ⁇ A2 The distance LX 1 to a predetermined position (for example, the center ⁇ T) of the (the teeth 61 a 1, 61 a 2, etc.) is determined by setting the tee on the side facing the notch portion TW and the center axis line BO therebetween.
- the distance (for example, the teeth 61 a 3) to the corresponding predetermined position (the center ⁇ T) can be longer than the distance LX 2.
- the tooth on the notch portion TW side from the center axis B 0 passing through the center axis A A 2 of the rotation axis of the rotor 40 is provided.
- the distance LX1 to the notch TW can be made longer than the distance LX2 to the tooth opposite to the notch TW and the center axis B ⁇ . Insufficient magnetic force due to the gap can be canceled out by increasing the distance of the notch portion TW to the tooth as described above.
- the distance LX 1 is made longer than the distance LX 2, and at the same time, the teeth (for example, T 6 lal, 61 a 2, etc.) are almost completely opposed to the magnet 45 B, and are further opposed to the notch TW with the center axis B ⁇ in between. Opposition to magnet 45B at a tooth (eg, tooth 61a3, etc.) The area can be reduced.
- the magnet attraction force can be reduced by reducing the magnet facing area on the side facing the notch portion TW across the central axis B 0, and the notch portion TW side and its It is possible to balance the imbalance of the magnet attraction force with the side opposite to the notch portion TW across the central axis BO.
- the distance between the inner surface 61 c and the outer surface 61 d of each tooth 61 and the center 0 A 1 of the notch circle is set.
- the relationship between the first and second distances L 1 and L 2 along the radial direction and the inner diameter R 1 and the outer diameter R 2 of the annular magnet 45 (45 A, 45 B) is shown. It is merely an example.
- the center OA1 of the plurality of teeth 61 and the center OA2 of the rotating shaft 42e of the rotor 40 are decentered, and the moment on the notch portion TW side and the notch are formed.
- the inner diameter of the magnet 45 (45A, 45B) can be balanced if it is possible to balance the moment on the side opposite the center axis B0 with respect to the part TW.
- the magnitude relationship between the two can be determined as appropriate. Note that the substantially notched circular shapes according to the first to seventh embodiments Fig.
- stator 83 shows a stator 83 with a plurality of teeth 81 arranged in a notched circle on the surface of the stator-side yoke 80 formed opposite to the magnet 45.
- the teeth 81a1 and 81a2 near both sides of the cutout portion TW by the connecting yoke 85 are used.
- the magnetic circuit between them can be maintained.
- the teeth 81a near both sides of the notch portion TW are also provided. It is possible to prevent a decrease in magnetic flux passing between 1 and 81a2, thereby preventing a decrease in torque.
- the electric motor which is the axial gap type rotating electric machine according to the present invention
- the present invention is not limited to this. Instead, it can be mounted on other devices / equipment, and the effects described above can be obtained.
- an axial gap type electric motor (electric motor) has been described as the axial gap type rotating electric machine according to the present invention, but the present invention is not limited to this. Instead, the present invention can be used also as a so-called generator that generates an electromotive force in a coil by rotating the rotor from the outside.
- the present invention is not limited to the above-described first to seventh embodiments, but can be implemented in other modes by making appropriate changes within the scope based on the gist of the invention. It is.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03788132A EP1542343B1 (en) | 2002-08-16 | 2003-08-15 | Axial gap type motor generator |
AT03788132T ATE528843T1 (de) | 2002-08-16 | 2003-08-15 | Motorgenerator mit axialem luftspalt |
AU2003254944A AU2003254944A1 (en) | 2002-08-16 | 2003-08-15 | Axial gap type motor generator |
JP2004528891A JP3994105B2 (ja) | 2002-08-16 | 2003-08-15 | アキシャルギャップ型回転電機 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-237334 | 2002-08-16 | ||
JP2002237334 | 2002-08-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004017498A1 true WO2004017498A1 (ja) | 2004-02-26 |
Family
ID=31884435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/010389 WO2004017498A1 (ja) | 2002-08-16 | 2003-08-15 | アキシャルギャップ型回転電機 |
Country Status (8)
Country | Link |
---|---|
EP (4) | EP2043227B1 (ja) |
JP (1) | JP3994105B2 (ja) |
CN (5) | CN101299550B (ja) |
AT (1) | ATE528843T1 (ja) |
AU (1) | AU2003254944A1 (ja) |
ES (1) | ES2371636T3 (ja) |
TW (1) | TWI308414B (ja) |
WO (1) | WO2004017498A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009037957A1 (ja) * | 2007-09-19 | 2009-03-26 | Sumida Corporation | モータ |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008131683A (ja) * | 2006-11-16 | 2008-06-05 | Fujitsu General Ltd | アキシャルエアギャップ型電動機 |
DE102010060482B4 (de) | 2010-11-10 | 2017-07-13 | Binova Gmbh | Elektrischer Scheibenläufermotor und Elektrofahrrad oder Pedelec mit einem Scheibenläufermotor |
DE102012207758A1 (de) * | 2012-05-09 | 2013-11-14 | Aktiebolaget Skf | Vorrichtung mit wenigstens einem Scheibenläufermotorrotor und Montageverfahren |
CN110350749A (zh) * | 2019-08-16 | 2019-10-18 | 眭华兴 | 一种轴向磁场轮毂电机 |
CN110581632B (zh) * | 2019-09-20 | 2020-10-23 | 哈尔滨工业大学(深圳) | 非均匀齿拓扑结构永磁游标电机及其磁场调制方法 |
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DE1613558B1 (de) * | 1967-01-20 | 1970-07-02 | Bauknecht Gmbh G | Elektrische Zwischenlaeufermaschine |
JPS5996846A (ja) * | 1982-11-25 | 1984-06-04 | Hitachi Seiko Ltd | 低振動電動機 |
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2003
- 2003-08-15 ES ES03788132T patent/ES2371636T3/es not_active Expired - Lifetime
- 2003-08-15 CN CN2008100854425A patent/CN101299550B/zh not_active Expired - Fee Related
- 2003-08-15 EP EP09000606A patent/EP2043227B1/en not_active Expired - Lifetime
- 2003-08-15 EP EP09000608.1A patent/EP2043229A3/en not_active Withdrawn
- 2003-08-15 TW TW092122512A patent/TWI308414B/zh not_active IP Right Cessation
- 2003-08-15 AU AU2003254944A patent/AU2003254944A1/en not_active Abandoned
- 2003-08-15 CN CN200810085443XA patent/CN101242127B/zh not_active Expired - Fee Related
- 2003-08-15 AT AT03788132T patent/ATE528843T1/de not_active IP Right Cessation
- 2003-08-15 EP EP09000607.3A patent/EP2043228A3/en not_active Withdrawn
- 2003-08-15 EP EP03788132A patent/EP1542343B1/en not_active Expired - Lifetime
- 2003-08-15 WO PCT/JP2003/010389 patent/WO2004017498A1/ja active Application Filing
- 2003-08-15 CN CN2008100854410A patent/CN101299563B/zh not_active Expired - Fee Related
- 2003-08-15 CN CNB038052156A patent/CN100420129C/zh not_active Expired - Fee Related
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JPS58153579U (ja) * | 1982-04-05 | 1983-10-14 | 株式会社シコー技研 | デイスク型ブラシレスモ−タ |
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WO2009037957A1 (ja) * | 2007-09-19 | 2009-03-26 | Sumida Corporation | モータ |
JP2009077500A (ja) * | 2007-09-19 | 2009-04-09 | Sumida Corporation | モータ |
Also Published As
Publication number | Publication date |
---|---|
ES2371636T3 (es) | 2012-01-05 |
TWI308414B (en) | 2009-04-01 |
EP2043228A2 (en) | 2009-04-01 |
TW200405640A (en) | 2004-04-01 |
CN101299562A (zh) | 2008-11-05 |
CN101299563A (zh) | 2008-11-05 |
EP2043227A3 (en) | 2011-03-23 |
CN101242127A (zh) | 2008-08-13 |
EP1542343A1 (en) | 2005-06-15 |
EP2043229A2 (en) | 2009-04-01 |
AU2003254944A1 (en) | 2004-03-03 |
JPWO2004017498A1 (ja) | 2005-12-08 |
JP3994105B2 (ja) | 2007-10-17 |
EP2043227A2 (en) | 2009-04-01 |
CN101299562B (zh) | 2010-12-29 |
CN100420129C (zh) | 2008-09-17 |
ATE528843T1 (de) | 2011-10-15 |
CN1639950A (zh) | 2005-07-13 |
EP1542343B1 (en) | 2011-10-12 |
EP2043227B1 (en) | 2012-07-11 |
EP1542343A4 (en) | 2006-08-09 |
CN101242127B (zh) | 2010-10-20 |
CN101299550A (zh) | 2008-11-05 |
CN101299550B (zh) | 2011-05-11 |
EP2043229A3 (en) | 2014-03-26 |
CN101299563B (zh) | 2012-04-18 |
EP2043228A3 (en) | 2014-03-19 |
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