JP4706351B2 - Inductor type motor - Google Patents

Description

The present invention relates to induction Shirubeko motor, and more particularly to a axial gap type motor having a ing derivative Shirubeko a magnetic body carrying the magnetic flux of the field side to the required position.

  Conventionally, Japanese Patent Laid-Open No. 54-116610 (Patent Document 1) and Japanese Patent Laid-Open No. 6-86517 (Patent Document 2) disclose a generator using an inductor. In the generator, as shown in FIG. 7, a field winding is provided on the outer periphery of a yoke 4 that passes through a bracket 2 serving as an outer cylinder through a bearing 3 and is fitted and fixed to the driving shaft 1. 5 and claw-shaped magnetic poles 6 and 7 (inductors) protruding alternately from the left and right of the field winding 5 are provided to form a rotor as a whole. On the other hand, the stator 2 is provided on the bracket 2 so as to face the claw-shaped magnetic poles 6 and 7. In addition, the power supply to the field winding 5 is configured to supply power slidably through the slip ring 9.

According to the above configuration, when a direct current is supplied to the field winding 5 through the slip ring 9, an N pole is generated on the right side of the field winding 5 in the figure and an S pole is generated on the left side of the figure. , The N pole is guided to the claw-shaped magnetic pole 6 protruding from the right side, and the S pole is guided to the claw-shaped magnetic pole 7 protruding from the left side. That is, by providing only one field winding 5 wound around the drive shaft 1, a plurality of N poles and S poles can be alternately generated in the circumferential direction on the outer peripheral side of the rotor. .
Some motors use inductors.

When the claw-shaped magnetic pole (inductor) is formed by bending a metal plate into a required shape as in Patent Document 1 and Patent Document 2, the inductor can be easily formed.
However, for example, when an inductor is used in an axial gap type motor, the inductor may be massive. In many cases, such a bulky inductor is formed by cutting a bulky magnetic material to form an inductor having a desired shape. However, this method has a problem that it takes a lot of labor and cost to produce the inductor. .

JP 54-116610 A JP-A-6-86517

  The present invention has been made in view of the above problems, and facilitates the production of an inductor suitably used for an axial gap type motor, and reduces the eddy current generated when an AC magnetic field acts on the inductor. The challenge is to do.

In order to solve the above problems, the present invention provides a rotor having a center hole fixed to a drive shaft and an inductor attached thereto, an armature side stator disposed on both sides in the axial direction of the rotor, and a field An axial gap type inductor motor with a side stator,
An armature coil is disposed in the armature side stator with an interval in the circumferential direction, and a ring-shaped field body is disposed in the field side stator,
Inductors attached to the rotor are attached to the rotor body at intervals in the circumferential direction and penetrating in the axial direction. One end face of these inductors is opposed to the armature coil and the other end face is The outer circumferential side and the inner circumferential side of the field body are alternately opposed to each other in the circumferential direction, and magnetic poles having opposite polarities alternately in the circumferential direction are formed.
Each inductor, a powder of magnetic material element is formed by integrating them with compressed in a mold, and the direction through which the magnetic flux toward the other end surface from the one end face of its length, the electric one end face While the opposite surface to the child coil is the opposite surface to the field body, the cross-sectional area in the vertical direction with respect to the magnetic flux direction is the same, and the vertical cross-sectional shape is the same as that of the one end surface and the other An inductor type motor characterized by being different from the end face is provided.

According to the above configuration, since the inductor is formed by compressing and integrating the powder magnetic body in the mold, the inductor having a complicated shape can be formed by manufacturing the mold in a required shape. Also, it can be easily formed in a shape in which the cross-sectional shapes are different between the one end surface and the other end surface. In addition, it can be formed with higher accuracy than when it is cut from a lump of metal, and can be mass-produced efficiently with a mold.

One end surface of the inductor is preferably either circular or arcuate and the other end surface is preferably the other.
According to the above configuration, since the end face of the inductor is circular or arcuate and the inductor is opposed to the magnetic flux generation region of the armature coil or field body, the inductor is efficiently magnetized, and the inductor is The used motor or the like can rotate the rotor with high efficiency.

As the magnetic powder, a powder containing any of silicon steel, permender, iron, and permalloy is preferably used.
In addition, it is preferable that the inductor formed from the magnetic powder is held in shape by molding the outer peripheral surface of the inductor except for both end faces facing the armature coil and the field body with resin.
In this way, by maintaining the shape, deformation of the inductor can be suppressed during storage or when it is attached to an inductor fitting hole of a rotor of an inductor type motor described later.

  In the axial gap type inductor type motor, the inductor needs to have a complicated shape with the same cross-sectional area but different shapes of both end faces. Therefore, the inductor having a complicated shape can be easily formed.

In other words, the inductor has a circular shape at one end surface facing the armature coil, while the other end surface facing the field body has an arc shape facing the outer circumferential side or the inner circumferential side of the field body. Yes.
According to the above configuration, since both end faces of the inductor are opposed to the armature coil and the magnetic flux generation region of the field body as described above, the inductor is efficiently magnetized, and the rotor of the inductor type motor is raised. It can be rotated with efficiency.

It is preferable that the field body and / or the armature coil is formed of a superconducting material.
When the field body and / or the armature coil is formed of a superconducting material, a large current can be supplied, the generated magnetic flux can be greatly strengthened, and high output can be achieved. Moreover, since a large current density can be obtained by achieving superconductivity, the field body and the armature coil can be reduced, and the inductor motor can be reduced in size and weight. As the superconducting material, it is preferable to use a high temperature superconducting material such as bismuth or yttrium.

  As described above, according to the present invention, the magnetic powder is compressed and integrated in the mold, so that the inductor having a complicated shape with different cross-sectional shapes at the one end face and the other end face is formed. But it can be formed easily. In addition, the accuracy can be increased compared to the case of cutting from a lump of metal, and mass production can be performed with a mold.

  An axial gap type comprising the rotor having the inductor and a center hole fixed to the drive shaft, and an armature side stator and a field side stator disposed on both sides in the axial direction of the rotor. The inductor type motor has a circular end surface opposite to the outer peripheral side or inner peripheral side of the field body while one end surface facing the armature coil of the inductor is circular and the other end surface facing the field body is circular. With the shape, the inductor is efficiently magnetized, and the rotor can be rotated with high efficiency.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an inductor type motor 10 of the embodiment.
The inductor type motor 10 is an axial gap type, and penetrates through the drive shaft 34 in the order of the field side stator 11, the rotor 12, the armature side stator 13, the rotor 14, and the field side stator 15, The field-side stators 11 and 15 and the armature-side stator 13 are fixed to the installation surface G and have a gap with the drive shaft 34, and the rotors 12 and 14 are externally fixed to the drive shaft 34.

The field side stator 11 and the field side stator 15 are bilaterally symmetric, and FIGS. 4A and 4B show one field side stator 15 as a representative.
The field side stators 11 and 15 include yokes 16 and 29 made of a magnetic material fixed to the installation surface G, heat insulating refrigerant containers 17 and 30 having a vacuum heat insulating structure embedded in the yokes 16 and 29, and a heat insulating refrigerant container. 17 and 30 and field coils 18 and 31 which are windings made of a superconducting material.
The yokes 16 and 29 have loose fitting holes 16b and 29b drilled in the center larger than the outer diameter of the drive shaft 34, and groove portions 16a and 29a recessed in an annular shape around the loose fitting holes 16b and 29b. I have. The heat insulating refrigerant containers 17 and 30 contain the field coils 18 and 31 in a state where liquid nitrogen is circulated, and the heat insulating refrigerant containers 17 and 30 are embedded in the grooves 16a and 29a.
The yokes 16 and 29 are made of a magnetic material such as permender, silicon steel plate, iron, and permalloy. Further, as a superconducting material for forming the field coils 18 and 31, a superconducting material such as bismuth or yttrium is used.

The rotors 12 and 14 are bilaterally symmetric, and one of the rotors 14 is representatively described in FIGS.
The rotors 12 and 14 are disk-shaped and made of a nonmagnetic material and have rotor main bodies 19 and 26 having center holes 19a and 26a, and a pair of S pole inductions embedded in point-symmetric positions around the center holes 19a and 26a. And a pair of N-pole inductors 20 and 28 embedded at positions rotated by 90 ° from the S-pole inductors 21 and 27.

The south pole inductors 21 and 27 and the north pole inductors 20 and 28 are formed in a shape shown in FIG. 3 by compressing and integrating the powder magnetic body 40 in a mold. FIG. 3A shows an N-pole inductor 20 having one end face 20a28a circular and the other end faces 20b, 28b arcuate.
The powder magnetic body 40 is made of powder of silicon steel, permender, iron, permalloy or the like.
Since the S-pole and N-pole inductors 21, 27, 20, and 28 are inserted into the holes of the non-magnetic rotors 12 and 14, it is not necessary to surround the outer periphery with the non-magnetic body, but FIG. As shown in FIG.
When the resin 41 is molded in this way, the shape of the inductor formed from the powder magnetic body 40 can be reliably maintained, and magnetic flux leakage in the direction perpendicular to the magnetic flux direction generated in the inductor can be prevented.

As shown in FIG. 2A, the S-pole inductors 21 and 27 and the N-pole inductors 20 and 28 are concentric with the circular end faces 20a, 21a, 27a, and 28a facing the armature-side stator 13, respectively. They are arranged at equal intervals on the top.
The other end faces 21b and 27b of the S pole inductors 21 and 27 are arranged so as to face the S pole generation position of the field coils 18 and 31, for example, the other end face 27b of the S pole inductor 27 is shown in FIG. ) And FIG. 5 (B), it is in the shape of a circular arc disposed opposite to the outer peripheral side of the field coil 31.
The other end faces 20b and 28b of the N pole inductors 20 and 28 are arranged so as to face the N pole generation position of the field coils 18 and 31, for example, the other end face 28b of the N pole inductor 28 is shown in FIG. ) And FIG. 5 (C), it is in the shape of a circular arc disposed opposite to the inner peripheral side of the field coil 31.

In other words, the S-pole inductors 21 and 27 and the N-pole inductors 20 and 28 have one end faces 20a, 21a, 20a, 21a, In 27a and 28a, it is set as the solid shape used as a circle. Further, the cross-sectional area in the direction perpendicular to the magnetic flux direction of the south pole inductors 21 and 27 and the north pole inductors 20 and 28 is constant from the other end faces 20b, 21b, 27b, 28b to the one end faces 20a, 21a, 27a, 28a. Yes. The other end surfaces 20b, 28b of the south pole inductors 20, 28 have the same area as the other end surfaces 21b, 27b of the north pole inductors 21, 27.
The rotor bodies 19 and 26 are made of a nonmagnetic material such as FRP or stainless steel.

As shown in FIGS. 1A, 1 </ b> B, and 6, the armature side stator 13 includes a support portion 22 made of a nonmagnetic material fixed to the installation surface G, and a vacuum embedded in the support portion 22. A heat insulating refrigerant container 23 having a heat insulating structure and an armature coil 24 that is a winding made of a superconducting material housed in the heat insulating refrigerant container 23 are provided.
The support portion 22 includes a loose fitting hole 22b drilled at the center larger than the outer diameter of the drive shaft 34, and four mounting holes 22a drilled at equal intervals in the circumferential direction around the loose fitting hole 22b. ing. The adiabatic refrigerant container 23 accommodates the armature coil 24 in a state where liquid nitrogen is circulated, and a flux collector 25 made of a magnetic material is disposed in a hollow portion of the armature coil 24. Four heat-insulating refrigerant containers 23 accommodating the armature coils 24 are embedded in the respective coil mounting holes 22a.
The flux collector 25 is made of a magnetic material such as a permender, a silicon steel plate, iron, or permalloy. Further, as the superconducting material forming the armature coil 24, a bismuth-based or yttrium-based superconducting material is used. Moreover, the support part 22 is formed with nonmagnetic materials, such as FRP and stainless steel.

A power feeding device 32 is connected to the field coils 18 and 31 and the armature coil 24 via wiring, and a direct current is supplied to the field coils 18 and 31 and a three-phase alternating current is supplied to the armature coil 24. ing.
A liquid nitrogen tank 33 is connected to the heat-insulating refrigerant containers 17, 23, and 30 through heat-insulating piping, and circulates liquid nitrogen as a refrigerant.

Next, the operating principle of the inductor type motor 10 will be described.
When a direct current is fed to the field coil 31 on the right side in FIG. 1, an S pole is generated on the outer peripheral side and an N pole is generated on the inner peripheral side. Then, as shown in FIGS. 5A and 5B, the magnetic flux on the south pole side is introduced into the south pole inductor 27 from the other end face 27b, and the south pole magnetic flux appears on the one end face 27a. Further, as shown in FIGS. 5A and 5C, the magnetic flux on the N pole side is introduced into the N pole inductor 28 from the other end face 28b, and the N pole magnetic flux appears on the one end face 28a. Here, since the other end surfaces 27 b and 28 b are arranged on concentric circles along the inner and outer peripheries of the field coil 31, the S pole is always provided on the one end surface 27 a of the S pole inductor 27 even when the rotor 14 rotates. Appears, and the N pole always appears on the one end face 28a of the N pole inductor 28.
When a direct current is supplied to the left field coil 18 in FIG. 1 according to the same principle, an N pole always appears on one end face 20 a of the N pole inductor 20 of the rotor 12, and one end face 21 a of the S pole inductor 21. Always has an S pole.

  When three-phase alternating current is fed to the armature coil 24 from this state, a rotating magnetic field is generated around the axis of the armature-side stator 13 due to a feeding phase shift between the three phases, and the rotors 12 and 14 are affected by this rotating magnetic field. A rotational force around the axis is generated in the N-pole inductors 20 and 28 and the S-pole inductors 21 and 27, the rotors 12 and 14 are rotated, and the drive shaft 34 is rotationally driven.

  According to the above configuration, since the powder magnetic body 40 is formed by compressing and integrating in the mold, a magnetic body having a complicated shape can be formed, and the one end face 20a, 21a, 27a, 28a and the other end face are formed. Inductors 20, 21, 27, and 28 having different cross-sectional shapes from 20b, 21b, 27b, and 28b can also be easily formed. Further, since the cross-sectional area of the N-pole inductors 20 and 28 and the cross-sectional area of the S-pole inductors 21 and 27 are the same, the attractive force / repulsive force generated between the armature coil 24 is constant, and the rotation The rotational balance of the children 12 and 14 is stabilized.

  Note that either one of the field coils 18 and 31 or the armature coil 24 may be formed of a normal conductive material such as a copper wire, and in that case, a cooling structure for the normal conductive wire can be omitted. . Moreover, although it is set as the motor in this embodiment, you may utilize as a generator with the same structure.

Induction Shirubeko motor of the present invention is used as a drive source such as an automobile or a ship.

(A) is sectional drawing of the inductor type motor of embodiment of this invention, (B) is sectional drawing in the position rotated 90 degrees. (A) is a front view of the rotor, (B) is a cross-sectional view taken along line II of (A), (C) is a rear view, and (D) is a cross-sectional view taken along the line II-II of (A). (A) (B) is a perspective view which shows an inductor. (A) is a front view of a field side stator, (B) is the II sectional view taken on the line of (A). (A) is a front view of a state where a rotor and a field side stator are penetrated by a drive shaft, (B) is a cross-sectional view taken along line II of (A), and (C) is a line II-II of (A). It is sectional drawing. It is a front view of an armature side stator. It is drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Inductor type motors 11, 15 Field side stators 12, 14 Rotor 13 Armature side stators 17, 23, 30 Vacuum insulation container 18, 31 Field coils 20, 28 N pole inductors 21, 27 S pole Inductor 24 Armature coil 34 Drive shaft 40 Magnetic powder 41 Mold resin

Claims (6)

An axial gap type induction comprising a rotor having a center hole fixed to the drive shaft and an inductor attached thereto, and an armature side stator and a field side stator disposed on both sides in the axial direction of the rotor. A child motor,
An armature coil is disposed in the armature side stator with an interval in the circumferential direction, and a ring-shaped field body is disposed in the field side stator,
Inductors attached to the rotor are attached to the rotor body at intervals in the circumferential direction and penetrating in the axial direction. One end face of these inductors is opposed to the armature coil and the other end face is The outer circumferential side and the inner circumferential side of the field body are alternately opposed to each other in the circumferential direction, and magnetic poles having opposite polarities alternately in the circumferential direction are formed.
Each inductor, a powder of magnetic material element is formed by integrating them with compressed in a mold, and the direction through which the magnetic flux toward the other end surface from the one end face of its length, the electric one end face While the opposite surface to the child coil is the opposite surface to the field body, the cross-sectional area in the vertical direction with respect to the magnetic flux direction is the same, and the vertical cross-sectional shape is the same as that of the one end surface and the other An inductor type motor characterized in that it is different from the end face . The inductor type motor according to claim 1, wherein one end surface of the inductor is either circular or arcuate and the other end surface is either one. The powder of magnetic material elements of the inductor, silicon steel, Pame down loaders, iron, inductor-type motor according to claim 1 or claim 2 comprising a powder containing either Permalloy. The inductor, the armature coil and inductor-type motor according to the outer peripheral surface except for both end surfaces to be opposed to the field magnet body in any one of claims 1 to 3 are molded with resin. One end surface of the inductor facing the armature coil has a circular shape, and the other end surface facing the field body has a circular arc shape facing the outer peripheral side or inner peripheral side of the field body. The inductor type motor according to claim 2 . The field magnetized member or / and inductor-type motor according to the armature coils to any one of claims 1 to請 Motomeko 5 are formed by a superconducting material.

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