JP4906606B2 - Axial gap type motor - Google Patents

Description

  The present invention relates to an axial gap type motor.

2. Description of the Related Art Conventionally, for example, 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 for a field magnetic flux generated by a permanent magnet of the rotor. A shaft gap type permanent magnet synchronous machine is known (see, for example, Patent Document 1 and Patent Document 2).
JP-A-10-271784 JP 2001-136721 A

By the way, in the permanent magnet synchronous machine according to the above prior art, in a permanent magnet synchronous machine including a rotor in which permanent magnets and magnetic bodies magnetized only in the same direction of the rotation axis direction are alternately arranged in the circumferential direction, for example, As compared with a permanent magnet synchronous machine having a rotor in which permanent magnets whose magnetization directions are reversed are alternately arranged in the circumferential direction, there arises a problem that the magnet torque is halved and the reluctance torque cannot be used effectively. .
In a permanent magnet synchronous machine including a rotor in which permanent magnets whose magnetization directions are reversed are alternately arranged in the circumferential direction and a magnetic body is arranged between the permanent magnets adjacent in the circumferential direction, the phase of the magnet torque Since the phase of the reluctance torque is different, there arises a problem that the magnet torque and the reluctance torque cannot be used effectively.
Further, in such a permanent magnet generator, the stator windings of the stator are linked together while reducing the eddy current loss due to the armature magnetic flux generated when the stator is energized to improve the operation efficiency of the permanent magnet generator. It is desired to increase the torque potential by further increasing the amount of flux linkage.

  The present invention has been made in view of the above circumstances, and while effectively reducing the eddy current loss generated during energization and improving the operation efficiency, the permanent magnet and the magnetic body provided in the rotor are effectively used to efficiently output. An object is to provide an axial gap type motor that can be increased.

In order to solve the above problems and achieve the object, an axial gap motor according to the first aspect of the present invention includes a rotor (for example, a permanent magnet piece 41 in the embodiment) (for example, a permanent magnet piece 41 in the embodiment). , And a pair of stators (for example, the stators 12 and 12 in the embodiment) disposed so as to face each other so as to sandwich the rotor from both sides in the rotation axis direction. The rotor includes a magnetic material pole portion (for example, the magnetic material pole portion 32 in the embodiment) alternately arranged with the permanent magnet pieces in the circumferential direction, and the permanent magnet pieces are The magnetization direction is parallel to the rotation axis direction, and only the north pole faces the stator on one side in the rotation axis direction, and only the south pole faces the stator on the other side in the rotation axis direction, Magnetism The pole part of the material is a pole part penetrating part penetrating in a direction parallel to the rotation axis direction (for example, the pole part penetrating hole 45, outer peripheral side slit 45a, inner peripheral side slit 45b, pole part through hole in the embodiment) 47), and arranged at the circumferential end of the permanent magnet piece and magnetized in a direction orthogonal to the rotational axis direction and the radial direction (for example, circumferentially arranged subpermanent in the embodiment) A second sub-permanent magnet that is magnetized in the radial direction (for example, the inner circumference side and the outer circumference side diameter arrangement in the embodiment). auxiliary permanent magnets 52a, 52 b) Ru with a.

  Furthermore, the axial gap type motor according to the second aspect of the present invention is the surface of one of the one side and the other side in the direction of the rotation axis of the permanent magnet piece, or the rotation of the permanent magnet piece. A magnetic material member (for example, the magnetic material member 42 in the embodiment) is provided on each surface on the one side and the other side in the axial direction.

  Furthermore, in the axial gap type motor according to the third aspect of the present invention, the magnetic material member includes a through portion that penetrates in a direction parallel to the rotation axis direction (for example, the through hole 42a in the embodiment, the outer peripheral side). A slit 42b and an inner peripheral slit 42c) are provided in the vicinity of the circumferential end.

Furthermore, the axial gap type motor according to the fourth aspect of the present invention is a partition member (for example, an implementation) made of a non-magnetic material disposed between the permanent magnet piece adjacent in the circumferential direction and the pole portion of the magnetic material. Radial ribs 34) in the form of

Furthermore, the axial gap type motor according to the fifth aspect of the present invention is provided between the magnetic material member adjacent in the circumferential direction and the pole portion of the magnetic material at both ends in the rotational axis direction of the partition member. A spacer member (for example, the spacer member 61 in the embodiment) made of a nonmagnetic material is provided.

Furthermore, in the axial gap type motor according to the sixth aspect of the present invention, the spacer member has a hollow shape.

Furthermore, in the axial gap type motor according to the seventh aspect of the present invention, the spacer member is formed of a laminated body in which the insulating nonmagnetic material and the noninsulating nonmagnetic material are laminated.

Furthermore, in the axial gap type motor according to the eighth aspect of the present invention, the partition member has a hollow shape.

Furthermore, in the axial gap type motor according to the ninth aspect of the present invention, the partition member is formed of the insulating nonmagnetic material (for example, the electrically insulating nonmagnetic material 34b in the embodiment) and the noninsulating material. A non-magnetic material (for example, the non-electrically insulating non-magnetic material 34a in the embodiment) is a laminated body.

Furthermore, the axial gap type motor according to the tenth aspect of the present invention includes an inner ring on the inner circumference side of the rotor (for example, the inner circumference cylindrical portion 35 in the embodiment), and the rotor. The outer peripheral side ring (for example, the outer peripheral side cylindrical portion 36 in the embodiment) disposed on the outer peripheral side of the inner peripheral side ring, and the inner peripheral side ring and the outer peripheral side ring in a state where they are disposed coaxially with each other Are connected by the partition members forming ribs.

According to the axial gap type motor of the first aspect of the present invention, the permanent magnet pieces arranged alternately with the pole portions of the magnetic material in the circumferential direction of the rotor are made to face only one of the pair of stators with only the N pole. In addition, since only the S pole is opposed to the other, the optimum energization phase with respect to the magnet torque and the optimum energization phase with respect to the reluctance torque coincide with each other in energization of the stator winding of the stator. The output can be efficiently increased by effectively using the torque.
In addition, the pole part of the magnetic material is provided between the pair of stators by providing the pole part of the magnetic material with a pole part penetration part made of, for example, a through hole or a slit penetrating in a direction parallel to the rotation axis direction. A magnetic path can be formed. As a result, a desired magnetic direction can be imparted to the current magnetic flux generated by the stator windings of each stator, the outputable torque can be increased, and the magnetic resistance between the pair of stators can be increased rapidly. The current flux waveform shaping by the stator winding of a pair of stators can be performed in such a way as to suppress the change, and the generation of harmonics of the torque ripple and current flux waveform can be suppressed, thereby reducing iron loss. Can do.
Furthermore, by providing a secondary permanent magnet magnetized in a direction perpendicular to the magnetization direction of the permanent magnet piece at the circumferential end of the permanent magnet piece, the magnetic flux lens effect due to the so-called permanent magnet piece and the Halbach arrangement of the secondary permanent magnet The magnetic fluxes of the permanent magnet piece and the sub permanent magnet can be converged, and the amount of magnetic flux linked to the stator winding of the stator can be increased.
Furthermore, by providing a second sub permanent magnet magnetized in a direction perpendicular to the magnetization direction of the permanent magnet piece at the circumferential end of the permanent magnet piece, a so-called permanent magnet piece and a Halbach of the second sub permanent magnet are provided. The magnetic flux effect of the arrangement allows the magnetic fluxes of the permanent magnet piece and the second secondary permanent magnet to converge, and the amount of magnetic flux linked to the stator winding of the stator can be increased.

  Furthermore, according to the axial gap type motor according to the second aspect of the present invention, by providing a member made of a magnetic material on the surface of the permanent magnet piece, it is possible to prevent a decrease in permeance of the permanent magnet piece and to reduce the permanent magnet piece. Magnetism can be suppressed and reluctance torque can be increased.

  Furthermore, according to the axial gap type motor according to the third aspect of the present invention, a through portion made of, for example, a through hole or a slit penetrating in a direction parallel to the rotation axis direction in the vicinity of the circumferential end of the magnetic material member. The magnetic path which penetrates the member of a magnetic material can be formed between a pair of stators. As a result, a desired magnetic direction can be imparted to the current magnetic flux generated by the stator windings of each stator, the outputable torque can be increased, and the magnetic resistance between the pair of stators can be increased rapidly. The current flux waveform shaping by the stator winding of a pair of stators can be performed in such a way as to suppress the change, and the generation of harmonics of the torque ripple and current flux waveform can be suppressed, thereby reducing iron loss. Can do.

Furthermore, according to the axial gap type motor according to the fourth aspect of the present invention, the structure is obtained by disposing the partition member made of the nonmagnetic material between the permanent magnet piece adjacent in the circumferential direction and the pole portion of the magnetic material. The operating efficiency of the axial gap type motor can be improved by effectively utilizing the magnetic flux of each permanent magnet piece while ensuring the desired rigidity of the body.

Furthermore, according to the axial gap type motor according to the fifth aspect of the present invention, at both ends of the partition member in the rotation axis direction, the magnetic member adjacent to the circumferential direction and the pole portion of the magnetic material are nonmagnetic. By disposing the spacer member made of a material, it is possible to improve the operation efficiency of the axial gap motor by effectively using the magnetic flux of each permanent magnet piece while improving the rigidity as the structure.

Furthermore, according to the axial gap type motor according to the sixth aspect of the present invention, by making the spacer member into a hollow shape, the magnetic insulation can be improved, and the magnetic flux of each permanent magnet piece is effectively utilized. Can reduce eddy current loss due to armature magnetic flux generated during energization, increase torque potential, prevent excessive temperature rise due to Joule heat, axial gap type The driving efficiency of the motor can be improved.

Furthermore, according to the axial gap type motor according to the seventh aspect of the present invention, the spacer member is made of a laminate in which an electrically insulating nonmagnetic material and a nonelectrically insulating nonmagnetic material are stacked. Can reduce eddy current loss due to armature magnetic flux that sometimes occurs, increase torque potential, prevent excessive temperature rise due to Joule heat, and improve the operating efficiency of axial gap motors be able to.

Furthermore, according to the axial gap type motor according to the eighth aspect of the present invention, by making the partition member into a hollow shape, the magnetic insulation can be improved, and the magnetic flux of each permanent magnet piece is effectively used. Can reduce eddy current loss due to armature magnetic flux generated during energization, increase torque potential, prevent excessive temperature rise due to Joule heat, axial gap type The driving efficiency of the motor can be improved.

Furthermore, according to the axial gap type motor of the ninth aspect of the present invention, the partition member is a laminate in which an electrically insulating nonmagnetic material and a nonelectrically insulating nonmagnetic material are stacked, Can reduce eddy current loss due to armature magnetic flux that sometimes occurs, increase torque potential, prevent excessive temperature rise due to Joule heat, and improve the operating efficiency of axial gap motors be able to.

Furthermore, according to the axial gap type motor according to the tenth aspect of the present invention, the inner ring and the outer ring that sandwich the pole portions of the permanent magnet piece and the magnetic material from both sides in the radial direction are coupled by the partition member. Thus, desired rigidity as the structure can be easily ensured.

Hereinafter, an embodiment of an axial gap type motor of the present invention will be described with reference to the accompanying drawings.
An axial gap type motor 10 according to the present embodiment includes, for example, a substantially annular rotor 11 provided to be rotatable around a rotation axis O of the axial gap type motor 10, as shown in FIGS. A pair of stators 12 and 12 having a plurality of stator windings that are arranged opposite to each other so as to sandwich the rotor 11 from both sides in the direction of the axis O and generate a rotating magnetic field that rotates the rotor 11. Yes.

  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.

  Further, 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 motor 10 is also axially transmitted when the output of the internal combustion engine is transmitted to the axial gap type motor 10. The gap type motor 10 functions as a generator and generates power generation energy.

  For example, as shown in FIG. 1, each stator 12 has a substantially annular plate-shaped yoke portion 21 and a rotational axis O from a position spaced apart on the opposing surface of the yoke portion 21 facing the rotor 11 in the circumferential direction. .., 22 that protrudes toward the rotor 11 along the direction and extends in the radial direction, and a stator winding (not shown) that is mounted between the appropriate teeth 22, 22. ing.

Each stator 12 is a 6N type having, for example, six main poles (for example, U ⁺ , V ⁺ , W ⁺ , U ⁻ , V ⁻ , W ⁻ ), and each stator 12 has a U ⁺ , The U ⁻ , V ⁻ , and W ⁻ poles of the other stator 12 are set to face the V ⁺ and W ⁺ poles in the direction of the rotation axis O.
For example, with respect to a pair of stators 12 and 12 facing in the direction of the rotation axis O, three stators 12 corresponding to one of U ⁺ , V ⁺ , W ⁺ poles and one of U ⁻ , V ⁻ , W ⁻ poles The teeth 22, 22, 22 and the three teeth 22, 22, 22 of the other stator 12 corresponding to the other of the U ⁺ , V ⁺ , W ⁺ pole and the other of the U ⁻ , V ⁻ , W ⁻ poles rotate. It is set so as to face each other in the direction of the axis O, and is set so that the energized state with respect to the teeth 22 of one stator 12 and the teeth 22 of the other stator 12 facing each other in the direction of the rotation axis O is reversed in electrical angle. ing.

  As shown in FIG. 2, for example, the rotor 11 includes a plurality of magnet pole portions 31,..., A plurality of magnetic material pole portions 32,..., And a rotor frame 33 made of a non-magnetic material. The magnet pole portions 31 and the magnetic material pole portions 32 are accommodated in the rotor frame 33 in a state of being alternately arranged in the circumferential direction.

The rotor frame 33 includes an inner peripheral cylindrical portion 35 and an outer peripheral cylindrical portion 36 connected by a plurality of columnar radial ribs 34,. A connecting portion 37 that is formed in an annular plate shape that protrudes inward from the inner peripheral surface of the side cylindrical portion 35 and that is connected to an external drive shaft (for example, an input shaft of a vehicle transmission). Configured.
And the magnet pole part 31 and the magnetic material pole part 32 accommodated in the rotor frame 33 are sandwiched by the inner peripheral side cylindrical part 35 and the outer peripheral side cylindrical part 36 from both sides in the radial direction, and the radial ribs. 34 to be adjacent to each other in the circumferential direction.

The magnet pole portion 31 includes a substantially sector plate-shaped permanent magnet piece 41 magnetized in the thickness direction (that is, the direction of the rotation axis O) and a pair of substantially sector shapes that sandwich the permanent magnet piece 41 from both sides in the thickness direction. The permanent magnet pieces 41,..., 41 of the plurality of magnet pole portions 31,..., 31 are set so that their magnetization directions are the same as each other. ing.
That is, only one of the N pole and S pole of each permanent magnet piece 41 is opposed to one stator 12 and the other stator 12 is opposed to the pair of stators 12 and 12 opposed in the direction of the rotation axis O. Only the other of the N pole and the S pole of each permanent magnet piece 41 faces each other.

The pair of magnetic material members 42 and 42 covering the one surface in the thickness direction of the permanent magnet piece 41 and the other surface are substantially fan-shaped in cross section in the thickness direction. Yes.
Further, the permanent magnet piece 41 of each magnet pole portion 31 accommodated in the rotor frame 33 is sandwiched from both sides in the circumferential direction by a pair of radial ribs 34 and 34 adjacent in the circumferential direction.

  The magnetic material pole portion 32 includes a plurality of pole portion through holes 45,..., 45 penetrating in a direction parallel to the rotation axis O direction. The plurality of pole through holes 45,..., 45 are arranged at predetermined intervals in the circumferential direction.

As described above, according to the axial gap type motor 10 according to the present embodiment, the permanent magnet pieces 41 of the magnet pole portions 31 that are alternately arranged with the magnetic material pole portions 32 in the circumferential direction of the rotor 11 are a pair. Since only the N pole is opposed to one of the stators 12 and 12 and only the S pole is opposed to the other, the energization of the stator windings of the pair of stators 12 and 12 is performed against the magnet torque by the magnet pole portion 31. The optimum energization phase and the optimum energization phase for the reluctance torque by the magnetic material electrode portion 32 coincide with each other, and the output can be efficiently increased by effectively using the magnet torque and the reluctance torque.
In addition, by providing the magnetic material members 42 and 42 that sandwich the magnetic poles of the permanent magnet piece 41, it is possible to prevent a decrease in permeance of the permanent magnet piece 41, suppress demagnetization of the permanent magnet piece 41, and reluctance. Torque can be further increased.

  Furthermore, by providing the magnetic material pole portion 32 with the pole portion through-hole 45, a magnetic path penetrating the magnetic material pole portion 32 can be formed between the pair of stators 12 and 12. As a result, a desired magnetic directionality can be imparted to the current magnetic flux generated by the stator winding of each stator 12, the outputable torque can be increased, and the magnetism between the pair of stators 12, 12 can be increased. The current flux waveform shaping by the stator windings of the pair of stators 12 and 12 can be performed so as to suppress a sudden change in resistance, and the generation of torque ripple and harmonics of the current flux waveform can be suppressed. Iron loss can be reduced.

  In the above-described embodiment, the magnetic material pole portion 32 is provided with the pole through-hole 45. However, the present invention is not limited to this. For example, as in the first modification shown in FIG. A plurality of through holes 42 a,. Each through-hole 42a is, for example, a long hole whose cross-sectional shape with respect to the rotation axis O direction has a radial direction as a longitudinal direction, and the plurality of through-holes 42a,..., 42a are arranged at predetermined intervals in the circumferential direction. .

  According to the first modification, the magnetic material member 42 is provided with a through hole 42a in the vicinity of the circumferential end thereof, thereby forming a magnetic path that penetrates the magnetic material member 42 between the pair of stators 12 and 12. Can do. Thereby, desired magnetic directionality can be given to the current magnetic flux by the stator windings of the respective stators 12 and 12, the torque that can be output can be increased, and between the pair of stators 12 and 12. The current magnetic flux waveform shaping by the stator windings of the pair of stators 12 and 12 can be performed so as to suppress a sudden change in the magnetic resistance of the motor, and torque ripples and harmonics of the current magnetic flux waveform can be generated. It can suppress and iron loss can be reduced.

In the above-described embodiment, the magnetic material pole portion 32 is provided with the pole through-hole 45. However, the present invention is not limited to this. For example, as in the second modification shown in FIG. The magnetic material pole portion 32 includes a plurality of outer peripheral side slits 45a or a plurality of inner peripheral side slits penetrating in a direction parallel to the rotation axis O direction, instead of the plurality of pole portion through holes 45 in the embodiment described above. 45b may be provided.
Each outer side slit 45a is, for example, a groove provided on the outer peripheral surface of the magnetic material pole portion 32 (for example, a groove formed so as to be cut radially inward from the outer peripheral surface of the magnetic material pole portion 32) ), The depth direction of each concave groove is the radially inner side of the magnetic material pole portion 32, and each concave groove extends in a direction parallel to the direction of the rotation axis O.
Each inner circumferential slit 45b is formed, for example, as a concave groove provided on the inner circumferential surface of the magnetic material pole portion 32 (for example, shaving radially outward from the inner circumferential surface of the magnetic material pole portion 32). Etc.), the depth direction of each concave groove is radially outward of the magnetic material pole portion 32, and each concave groove extends in a direction parallel to the rotation axis O direction.

In the first modification described above, the magnetic material member 42 is provided with the through hole 42a. However, the present invention is not limited to this. For example, as in the third modification shown in FIG. The material member 42 includes a plurality of outer peripheral slits 42b or a plurality of inner peripheral slits 42c penetrating in a direction parallel to the rotation axis O direction, instead of the plurality of through holes 42a in the first modification described above. Also good.
Each outer peripheral slit 42b is formed by, for example, a concave groove provided on the outer peripheral surface of the magnetic member 42 (for example, a concave groove formed so as to be cut radially inward from the outer peripheral surface of the magnetic member 42). The depth direction of each groove is formed inward in the radial direction of the magnetic member 42, and each groove extends in a direction parallel to the rotation axis O direction.
In addition, each inner circumferential slit 42c is formed, for example, by cutting away from a concave groove (for example, an inner circumferential surface of the magnetic material member 42 radially outward from the inner circumferential surface of the magnetic material member 42). The depth direction of each concave groove is outward in the radial direction of the magnetic member 42, and each concave groove extends in a direction parallel to the rotation axis O direction.

In the above-described embodiment, the magnetic material pole portion 32 includes the pole portion through-hole 45 whose cross-sectional shape with respect to the rotation axis O direction is a long hole shape whose longitudinal direction is the radial direction. Without being limited thereto, for example, as in the fourth modification shown in FIGS. 6 and 7, the substantially pole-shaped magnetic material pole portion 32 has a rotating shaft instead of the pole through hole 45 in the above-described embodiment. A plurality of pole portion through holes 47,..., 47 that penetrate in a direction parallel to the O direction may be provided. In the fourth modified example, each of the pole through holes 47 has, for example, a circular shape in cross section with respect to the rotation axis O direction, and the plurality of pole through holes 47,. Has been placed.
In the first modification of the above-described embodiment, the magnetic member 42 of the magnet pole portion 31 penetrates in a direction parallel to the direction of the rotation axis O instead of the through hole 42a, and at a predetermined interval in the radial direction. A plurality of through-holes (not shown) may be provided.

In the above-described embodiment, the magnet pole portion 31 includes the permanent magnet piece 41 and the pair of magnetic material members 42 and 42 that sandwich the permanent magnet piece 41 from both sides in the thickness direction. However, the present invention is not limited to this. For example, as in the fifth modification shown in FIGS. 8 and 9, the pair of magnetic members 42, 42 may be omitted, or the pair of magnetic members 42, 42 may be omitted. Only one of 42 may be omitted.
In the fifth modified example, the rotor frame 33 includes, for example, an inner peripheral side connection portion 37 and an outer peripheral side cylinder connected by a plurality of radial ribs 34,. And an inner peripheral side connection portion 37 formed in an annular plate shape is connected to an external drive shaft (for example, an input shaft of a vehicle transmission). Yes. That is, in the third modification, the inner peripheral cylindrical portion 35 in the above-described embodiment is omitted, and the magnet pole portion 31 and the magnetic material pole portion 32 housed in the rotor frame 33 are in the radial direction. It is sandwiched between the connecting portion 37 and the outer cylindrical portion 36 from both sides.

In the above-described embodiment, for example, as in the sixth modified example shown in FIGS. 10 and 11, it is disposed at the circumferential end of the permanent magnet piece 41 of the magnet pole portion 31 and also in the direction of the rotation axis O. A plurality of circumferentially arranged sub-permanent magnets 51,... 51 magnetized in a direction orthogonal to the radial direction may be provided.
The plurality of circumferentially arranged sub-permanent magnets 51,..., 51 are disposed between the magnet pole portion 31 and the magnetic material pole portion 32 on one side and the other side in the direction of the rotation axis O. In other words, in the sixth modification, the magnet pole portion 31 includes each pair of magnetic material members 42 sandwiched from both sides in the circumferential direction in addition to the permanent magnet piece 41 and the pair of magnetic material members 42 and 42. Of the circumferentially arranged secondary permanent magnets 51, 51, and the circumferentially arranged secondary permanent magnet 51 arranged on one side in the direction parallel to the rotation axis O direction and the circumferentially arranged secondary permanent magnet 51 arranged on the other side, The radial ribs 34 of the rotor frame 33 are set so as to be sandwiched from both sides in a direction parallel to the rotation axis O direction.

In the magnet pole portion 31, a pair of circumferentially arranged auxiliary permanent magnets 51, 51 facing each other in the circumferential direction via the magnetic material member 42, and parallel to the rotation axis O direction via the radial rib 34 of the rotor frame 33. A pair of circumferentially arranged sub-permanent magnets 51, 51 that face each other in different directions are set so that their magnetization directions are different from each other.
The pair of circumferentially arranged auxiliary permanent magnets 51, 51 arranged on one side in the direction parallel to the rotation axis O direction is one side of the permanent magnet piece 41 magnetized in the direction parallel to the rotation axis O direction. A pair of circumferentially arranged sub-permanent magnets 51, 51 arranged on the other side of the direction parallel to the rotation axis O direction are parallel to the rotation axis O direction. The permanent magnet piece 41 magnetized in a certain direction is arranged so that the same magnetic pole as that of the other side of the permanent magnet piece 41 is opposed to the other side.

  That is, for example, with respect to the permanent magnet piece 41 in which one side in the direction parallel to the rotation axis O direction is the N pole and the other side is the S pole, the magnetic material member 42 is surrounded on one side in the direction parallel to the rotation axis O direction. A pair of circumferentially arranged sub-permanent magnets 51, 51 sandwiched from both sides in the direction are arranged so that their N poles face each other in the circumferential direction, and the magnetic material member 42 is disposed on the other side in the direction parallel to the rotation axis O direction. The pair of circumferentially arranged sub permanent magnets 51 and 51 sandwiched from both sides in the circumferential direction are arranged so that their S poles face each other in the circumferential direction.

  According to the axial gap type motor 10 according to the sixth modification, the magnetic fluxes of the permanent magnet piece 41 and the circumferentially arranged sub-permanent magnets 51 and 51 are converged by the magnetic flux lens effect by the so-called permanent magnet Halbach arrangement. , 12 is increased relative to the effective magnetic flux.

  In the sixth modification, for example, as shown in FIGS. 12 and 13, in the magnet pole portion 31, a pair of circumferentially arranged auxiliary permanent magnets arranged on one side in the direction parallel to the rotation axis O direction. 51, 51, the circumferentially arranged secondary permanent magnet 51 on either one side in the circumferential direction is omitted, and a pair of circumferentially arranged secondary permanent magnets 51 arranged on the other side in the direction parallel to the rotation axis O direction. Of 51, the circumferentially arranged secondary permanent magnet 51 on the other side in the circumferential direction may be omitted.

In the embodiment described above, a plurality of magnets arranged in the radial direction of the permanent magnet piece 41 of the magnet pole portion 31 and magnetized in the radial direction, for example, as in the seventh modification shown in FIG. The inner peripheral side and outer peripheral side diameter arrangement sub permanent magnets 52a and 52b may be provided.
The plurality of inner peripheral side and outer peripheral side diameter-arranged sub permanent magnets 52a and 52b sandwich the magnetic material members 42 of the magnet pole portion 31 from both sides in the radial direction on one side and the other side in the rotation axis O direction. Has been placed.
That is, in the seventh modification, the magnet pole portion 31 includes a pair of permanent magnet pieces 41 and a pair of magnetic material members 42, 42, and each pair of magnetic material members 42 sandwiched from both sides in the radial direction. The inner peripheral side and outer peripheral side diameter arrangement sub permanent magnets 52a and 52b are provided.

  Further, in the seventh modification, the rotor frame 33 includes, for example, a plurality of radial ribs 34,..., 34 arranged at predetermined intervals in the circumferential direction, as shown in FIG. In addition to the portion 35, the outer peripheral cylindrical portion 36, and the connecting portion 37, the inner peripheral side circumferential ridge 35a, the inner peripheral side axial ridge 35b, the outer peripheral side circumferential ridge 36a, and the outer peripheral side An axial ridge 36b is provided.

  That is, on the outer peripheral surface of the inner peripheral side tubular portion 35, an inner peripheral side circumferential ridge 35a that protrudes radially outward at the center of the rotation axis O direction and extends in the circumferential direction, and in the circumferential direction. A plurality of inner circumferential axial ridges 35b,..., 35b projecting radially outward at predetermined intervals and extending parallel to the direction of the rotation axis O are provided.

  Further, on the inner peripheral surface of the outer peripheral side tubular portion 36, it protrudes radially inward at the center of the rotation axis O direction so as to face the inner peripheral side circumferential protrusion 35a and in the circumferential direction. An outer circumferential side circumferential ridge 36a that extends, and a rotating shaft that projects radially inward at a predetermined interval in the circumferential direction so as to face each inner circumferential side axial ridge 35b,. A plurality of outer peripheral side axial ridges 36b, ..., 36b extending in parallel with the O direction are provided.

And the protrusion height in the radial direction of each protrusion 35a, 35b and the protrusion height in the radial direction of each protrusion 36a, 36b are made equal.
And the radial rib 34 is arrange | positioned so that the intersection of each protrusion 35a, 35b and the intersection of each protrusion 36a, 36b may be connected.

And, on one side and the other side in the direction parallel to the rotation axis O direction, the inner peripheral side diameter arrangement of the pair of inner peripheral side and outer peripheral side diameter arrangement sub-permanent magnets 52a and 52b that make a pair in the radial direction. The secondary permanent magnet 52a is sandwiched from both sides in the circumferential direction by the inner circumferential side axial protrusions 35b, 35b adjacent in the circumferential direction, and the outer circumferential side diameter arranged secondary permanent magnet 52b is projected in the circumferential direction adjacent to the outer circumferential side axial direction. It is sandwiched from both sides in the circumferential direction by the strips 36b and 36b.
Further, the inner circumferential side radially arranged sub permanent magnets 52a, 52a facing each other in a direction parallel to the rotation axis O direction sandwich the inner circumferential side circumferential protrusion 35a from both sides of this direction, and are parallel to the rotation axis O direction. The outer peripheral side diameter-arranged sub permanent magnets 52b and 52b that are opposed to each other sandwich the outer peripheral side circumferential ridge 36a from both sides in this direction.

In the magnet pole portion 31, a pair of inner peripheral side and outer peripheral side radially arranged sub permanent magnets 52 a and 52 b that are opposed to each other in the radial direction via the magnetic material member 42, and the inner peripheral side circumferential protrusion of the rotor frame 33. The inner peripheral side diameter-arranged sub permanent magnets 52a, 52a facing each other in a direction parallel to the rotation axis O direction via 35a and the outer circumference side circumferential protrusion 36a of the rotor frame 33 are parallel to the rotation axis O direction. The outer peripheral side diameter-arranged sub permanent magnets 52b, 52b that face each other in different directions are set so that their magnetization directions are different from each other.
And a pair of inner peripheral side and outer peripheral side diameter arrangement sub permanent magnets 52a and 52b arranged on one side in a direction parallel to the rotation axis O direction are permanently magnetized in a direction parallel to the rotation axis O direction. A pair of inner-periphery and outer-diameter-side sub-permanent magnets arranged so that the same magnetic pole as the magnetic pole on one side of the magnet piece 41 is opposed to the other side in the direction parallel to the rotation axis O direction 52a and 52b are arrange | positioned so that the magnetic pole of the same polarity as the magnetic pole of the other side of the permanent magnet piece 41 magnetized in the direction parallel to the rotating shaft O direction may be opposed.

  That is, for example, with respect to the permanent magnet piece 41 in which one side in the direction parallel to the rotation axis O direction is the N pole and the other side is the S pole, the magnetic material member 42 is formed on one side in the direction parallel to the rotation axis O direction. The pair of inner peripheral side and outer peripheral side radially arranged sub permanent magnets 52a and 52b sandwiched from both sides in the direction are arranged so that their N poles face each other in the radial direction, and the other side in the direction parallel to the rotation axis O direction The pair of inner and outer diameter side-arranged sub permanent magnets 52a and 52b that sandwich the magnetic material member 42 from both sides in the radial direction are arranged so that their S poles face each other in the radial direction.

According to the axial gap type motor 10 according to the seventh modification, the magnetic fluxes of the permanent magnet piece 41 and the inner and outer diameter side arranged secondary permanent magnets 52a and 52b are caused by the magnetic lens effect by the so-called permanent magnet Halbach arrangement. The effective magnetic flux that converges and interlinks with the stators 12 and 12 is relatively increased.
In the seventh modification, in the magnet pole portion 31, the radial direction among the inner peripheral side and outer peripheral side diameter-arranged sub permanent magnets 52a and 52b disposed on one side in the direction parallel to the rotation axis O direction. Is omitted, and one of the radially outer sub-permanent magnets 52a and 52b arranged on the other side in the direction parallel to the rotation axis O direction is omitted. May be.

  In the above-described embodiment and the first to fourth modifications shown in FIGS. 1 to 7, for example, the radial ribs 34 of the rotor frame 33 made of a non-magnetic material are columnar. For example, as in the eighth modification shown in FIG. 15, the radial rib 34 may have a hollow shape and may be formed in a cylindrical shape extending in the radial direction by a nonmagnetic material.

For example, according to the axial gap type motor 10 according to the eighth modification of the embodiment shown in FIG. 16 shown in FIG. 16, the radial gap between the permanent magnet piece 41 and the magnetic material electrode portion 32 adjacent in the circumferential direction is provided. An extending cylindrical radial rib 34 is arranged.
According to the axial gap type motor 10 according to the eighth modification, the magnetic insulation can be improved while ensuring the desired rigidity as the structure. As a result, the magnetic flux of the permanent magnet piece 41 can be used effectively, the eddy current loss due to the armature magnetic flux generated during energization can be reduced, the torque potential can be increased, and excessive due to Joule heat. Temperature increase can be prevented, and the operating efficiency of the axial gap motor 10 can be improved.

Furthermore, in the eighth modification, the radial ribs 34 are simply formed in a hollow shape with a nonmagnetic material, but the present invention is not limited to this, for example, as in the ninth modification shown in FIG. Furthermore, the radial ribs 34 may be formed from a laminate in which an electrically insulating nonmagnetic material and a nonelectrically insulating nonmagnetic material are stacked. For example, in the ninth modification shown in FIG. 17, the cylindrical radial rib 34 is made of, for example, a metal-based annular nonmagnetic material (for example, copper) 34 a that is non-electrically insulating and an electrically insulating annular nonmagnetic material. The magnetic material 34b is alternately stacked in the radial direction.
According to the ninth modification, the radial rib 34 is a laminate in which a non-electrically insulating nonmagnetic material 34a and an electrically insulating nonmagnetic material 34b are stacked, so that an armature that is generated when energized is generated. Eddy current loss due to magnetic flux can be further reduced, and excessive temperature rise due to Joule heat can be prevented.

In the ninth modification, the radial rib 34 is hollow. However, the present invention is not limited to this, and the radial rib 34 is made of an electrically insulating nonmagnetic material and a nonelectrically insulating nonmagnetic material. In the case of forming from a stacked laminate, the radial ribs 34 may be formed in columnar shapes extending in the radial direction, for example, as in the tenth modification shown in FIG. In the tenth modification, the columnar radial ribs 34 are made of, for example, a metal-based plate-like nonmagnetic material (for example, copper) 34a that is non-electrically insulating and an electrically insulating plate-like nonmagnetic material 34b. Are alternately stacked in the radial direction.
According to the tenth modification, by forming the columnar radial ribs 34 from the laminate in which the non-electrically insulating nonmagnetic material 34a and the electrically insulating nonmagnetic material 34b are laminated, The rigidity of the structure can be improved while suppressing the generation of eddy current loss due to the armature magnetic flux.

  For example, in the eighth to tenth modifications shown in FIGS. 15 to 18, the radial width of the radial rib 34 and the radial width of the permanent magnet piece 41 are the same. For example, the radial width of the radial rib 34 may be formed larger than the radial width of the permanent magnet piece 41 as in the eleventh modification shown in FIG. 19.

For example, according to the axial gap type motor 10 according to the eleventh modification of the eighth modification shown in FIG. 19, the radial width of the radial rib 34 is such that the permanent magnet piece 41 and the permanent magnet piece 41 are The radial width of the pair of magnetic material members 42 and 42 sandwiched from both sides in the thickness direction is the same.
According to the axial gap type motor 10 according to the eleventh modification, the magnetic material member 42 and the magnetic material pole portion adjacent to each other between the permanent magnet piece 41 and the magnetic material pole portion 32 adjacent in the circumferential direction and the circumferential direction. 32 is a radial rib formed of at least one of a laminated body in which a cylindrical or non-electrically insulating nonmagnetic material 34a and an electrically insulating nonmagnetic material 34b are radially extended between 34 is arrange | positioned and the rigidity as a structure can be improved further.

In the above-described embodiment and the first to fourth modifications shown in FIGS. 1 to 7, for example, and in the eighth to tenth modifications shown in FIGS. 15 to 18, for example, Although the radial rib 34 is provided between the permanent magnet piece 41 and the magnetic material electrode portion 32, the radial rib 34 is not limited to this, and is further adjacent in the circumferential direction at both ends of the radial rib 34 in the rotation axis O direction. You may provide the spacer member 61 which consists of a nonmagnetic material arrange | positioned between the magnetic material member 42 and the magnetic material pole part 32 which fit.
For example, in the twelfth modification shown in FIG. 20, the spacer member 61 has a hollow shape and is formed in a cylindrical shape extending in the radial direction by a nonmagnetic material.
The spacer member 61 is not limited to a hollow shape formed simply by a nonmagnetic material, and for example, an electrically insulating nonmagnetic material and a nonelectrically insulating nonmagnetic material are laminated in the radial direction. You may form from a laminated body. In the case where the spacer member 61 is formed from a laminate in which an electrically insulating nonmagnetic material and a nonelectrically insulating nonmagnetic material are stacked, the spacer member 61 may be formed in a columnar shape extending in the radial direction. Good.

Further, for example, in the sixth modification and the seventh modification shown in FIGS. 10 to 14, the permanent magnet piece 41 and the magnetic material pole portion 32 are sandwiched from both sides in the circumferential direction and a pair of circumferentially arranged sub Although the radial ribs 34 of the rotor frame 33 made of a non-magnetic material sandwiched between the permanent magnets 51 and 51 from both sides in the direction of the rotation axis O are columnar, the present invention is not limited to this. As described above, the radial rib 34 may have a hollow shape, and may be formed in a cylindrical shape extending in the radial direction by a nonmagnetic material.
The radial ribs 34 are not limited to a hollow shape simply formed of a nonmagnetic material. For example, an electrically insulating nonmagnetic material 34b and a nonelectrically insulating nonmagnetic material 34a are radially arranged. You may form from the laminated body laminated | stacked. When the radial rib 34 is formed from a laminate in which an electrically insulating nonmagnetic material and a nonelectrically insulating nonmagnetic material are stacked, the radial rib 34 is formed in a column shape extending in the radial direction. May be.

It is a perspective view of an axial gap type motor concerning one embodiment of the present invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on one Embodiment of this invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on the 1st modification of one Embodiment of this invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on the 2nd modification of one Embodiment of this invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on the 3rd modification of one Embodiment of this invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on the 4th modification of one Embodiment of this invention. It is a top view of the rotor of the axial gap type motor which concerns on the 4th modification of one Embodiment of this invention. It is a perspective view of the axial gap type motor which concerns on the 5th modification of one Embodiment of this invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on the 5th modification of one Embodiment of this invention. It is a perspective view of the axial gap type motor which concerns on the 6th modification of one Embodiment of this invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on the 6th modification of one Embodiment of this invention. It is a perspective view of the axial gap type motor which concerns on the 6th modification of one Embodiment of this invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on the 6th modification of one Embodiment of this invention. It is a disassembled perspective view of the rotor of the axial gap type motor which concerns on the 7th modification of one Embodiment of this invention. It is a perspective view of the radial direction rib of the axial gap type motor which concerns on the 8th modification of one Embodiment of this invention. It is principal part sectional drawing with respect to the radial direction of the axial gap type motor which concerns on the 8th modification of one Embodiment of this invention. It is a perspective view of the radial direction rib of the axial gap type motor which concerns on the 9th modification of one Embodiment of this invention. It is a perspective view of the radial direction rib of the axial gap type motor concerning the 10th modification of one embodiment of the present invention. It is principal part sectional drawing with respect to the radial direction of the axial gap type motor which concerns on the 11th modification of one Embodiment of this invention. It is principal part sectional drawing with respect to the radial direction of the axial gap type motor which concerns on the 12th modification of one Embodiment of this invention. It is principal part sectional drawing with respect to the radial direction of the axial gap type motor which concerns on the 13th modification of one Embodiment of this invention.

Explanation of symbols

10 Axial gap type motor 11 Rotor 32 Magnetic material pole (magnetic material pole)
34 Radial rib (partition member)
34a Non-electrically insulating non-magnetic material 34b Non-electrically insulating non-magnetic material 35 Inner peripheral side cylindrical portion (inner peripheral side ring)
36 Outer peripheral side cylindrical part (outer peripheral side ring)
41 Permanent magnet piece 42 Magnetic material member (member of magnetic material)
42a Through hole (through part)
42b Peripheral slit (penetrating part)
42c Inner circumference side slit (penetration part)
45 Pole through hole (Pole through part)
45a Peripheral slit (pole penetration)
45b Inner circumference side slit (pole penetration)
47 Pole through hole (Pole through part)
51 Circumferentially arranged secondary permanent magnet (secondary permanent magnet)
52a Inner diameter side arrangement secondary permanent magnet (second secondary permanent magnet)
52b Peripheral magnet arranged on the outer diameter side (second sub-permanent magnet)

Claims (10)

An axial gap type motor comprising a rotor having a permanent magnet piece and a pair of stators arranged to face each other so as to sandwich the rotor from both sides in the rotation axis direction,
The rotor includes magnetic material poles alternately arranged with the permanent magnet pieces in the circumferential direction,
The permanent magnet piece has a magnetization direction parallel to the rotation axis direction, and faces only the north pole to the stator on one side in the rotation axis direction, and the south pole on the stator on the other side in the rotation axis direction. Only facing,
The pole part of the magnetic material includes a pole part penetrating part penetrating in a direction parallel to the rotation axis direction ,
The secondary permanent magnet is arranged at a circumferential end of the permanent magnet piece and magnetized in a direction perpendicular to the rotation axis direction and the radial direction,
Wherein while being arranged in the radial direction end portion of the permanent magnet pieces, the axial gap motor according to claim Rukoto comprises a second sub permanent magnet magnetized in the radial direction. On the surface of either the one side or the other side of the rotation axis direction of the permanent magnet piece, or on the surface of the one side or the other side of the rotation axis direction of the permanent magnet piece, The axial gap type motor according to claim 1, further comprising a magnetic material member. The axial gap type motor according to claim 2, wherein the magnetic material member includes a penetrating portion penetrating in a direction parallel to the rotation axis direction in the vicinity of an end portion in the circumferential direction. The partition member which consists of a nonmagnetic material arrange | positioned between the said permanent magnet piece adjacent to the circumferential direction and the pole part of the said magnetic material is provided in any one of Claims 1-3 characterized by the above-mentioned. The described axial gap type motor. A spacer member made of a non-magnetic material is provided at both ends of the partition member in the rotation axis direction between the magnetic material member adjacent in the circumferential direction and the pole portion of the magnetic material. The axial gap type motor according to claim 4 . The axial gap motor according to claim 5 , wherein the spacer member has a hollow shape. The axial gap motor according to claim 5 or 6 , wherein the spacer member is a laminated body in which the insulating nonmagnetic material and the noninsulating nonmagnetic material are stacked. The axial gap motor according to any one of claims 4 to 7 , wherein the partition member has a hollow shape. The axial member according to any one of claims 4 to 8 , wherein the partition member is formed of a laminated body in which the insulating non-magnetic material and the non-insulating non-magnetic material are stacked. Gap type motor. An inner ring arranged on the inner circumference side of the rotor, and an outer ring arranged on the outer circumference side of the rotor,
The inner and peripheral side ring and the outer circumferential side ring in a state of being disposed coaxially with each other, any one of claims 9 claim 4, characterized in that it is coupled by the partition member forming the ribs An axial gap type motor described in 1.

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