JP4529500B2 - Axial gap rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine such as a motor and a generator, and more particularly to an axial gap rotating electrical machine in which a disk-shaped rotor and a stator are opposed in the axial direction.

  A so-called axial gap motor in which a stator is disposed opposite to a disk-type rotor with a gap interposed between end faces in the axial direction of the rotor is conventionally known. This motor obtains a rotational driving force by a magnetic force acting between the surfaces of a rotor and a stator opposed in the axial direction. The axial gap motor has an advantage that the axial thickness can be reduced as compared with a so-called radial type motor composed of a conventional cylindrical rotor and an annular stator surrounding the peripheral surface thereof.

The types of axial gap motors known in the art include a reluctance type in which salient poles are formed by magnetic members on the end face of the rotor facing the stator, and the rotor in the axial direction corresponding to the rotational drive magnetic pole of the stator. There is a permanent magnet type in which permanent magnets are arranged with the magnetic poles facing. Patent Document 1 discloses an example in which a thin double rotor type motor symmetrical in the axial direction is configured with one stator and a pair of rotors sandwiching the stator based on such a permanent magnet type. The rotor in this technique has a structure in which a permanent magnet is attached to the surface of the rotor core.
Japanese Patent Laid-Open No. 10-80113

  By the way, the applicant has created a rotating electrical machine composed of a combination of a reluctance type and a permanent magnet type different from the previously known type. The rotating electrical machine according to the present invention has a configuration in which iron cores and permanent magnets are alternately arranged on one surface of a rotor in the circumferential direction, and the permanent magnets are arranged with their magnetic poles oriented in the circumferential direction of the rotor. . According to this, as a motor, reluctance torque and permanent magnet torque can be generated on one surface of the rotor. Therefore, according to this configuration, it is possible to increase the torque that can be generated on one rotor surface, and it is possible to increase the torque compared to the conventional axial gap motor.

  However, this structure is not a single-piece structure in which the iron core of each pole of the rotor is connected by the back yoke as in the conventional structure, but has a divided structure for each pole, so the rotor core and the permanent magnet are bundled together. A supporting member is required. In addition, in this structure, since the magnetic poles of the permanent magnets are directed in the circumferential direction, the compactness without the back yoke is an advantage. Therefore, how to make the rotor core and the permanent magnet support members compact is a problem. If the support member is of the same size as the back yoke, the precious advantages will be lost.

  In addition, there is a method of attaching an iron core and a permanent magnet to a support member as an ordinary recalling method. In this method, both the iron core and the permanent magnet are attracted by the attraction force acting on the iron core due to a decrease in the adhesive force due to heat. The problem of durability against the centrifugal force acting on the surface is expected. Under these circumstances, a support structure that is compact and has excellent suction resistance and centrifugal resistance is required.

  The present invention provides an axial gap rotating electrical machine according to the applicant's idea, which utilizes a compact characteristic that does not require a back yoke that is unique to the rotating electrical machine, and also has an attractive force and centrifugal force acting on an independent rotor core and permanent magnet. The main purpose is to realize a compact and high-strength rotor structure that can withstand force.

In order to achieve the above-described object, the present invention provides a rotor (1) having a permanent magnet (11) and an iron core (12) disposed thereon, and an end face with an axial gap (G) interposed between the end faces of the rotor. In an axial gap rotating electrical machine having a stator (2) opposed to each other, the rotor has a support member (13) that fits and supports a plurality of the iron cores separated from each other and is connected to the rotating shaft (10). The permanent magnet is attached to a support member between the iron cores in the rotor circumferential direction with the magnetic poles oriented in the rotor circumferential direction, and the support member has an outer periphery to prevent scattering due to centrifugal force applied to the iron core. And a spoke portion (13c) that connects the annular portion with a hub portion (13a) fitted to the rotating shaft, and the permanent magnet is disposed along the spoke portion. The iron core has a hub part and a spoke part. And main feature that it is spaced apart from each other in a space surrounded by the annular portion.
In the above configuration, the iron core is supported on the back side of the surface where the support member faces the stator in order to prevent the stator from acting in the direction of decreasing the gap due to the suction force of the stator acting on the iron core. It is desirable to have a configuration including an engaging portion (12a) that comes into contact.
Alternatively, it is desirable that the permanent magnet has a configuration in which the spoke portion is attached to a surface facing the stator.
The permanent magnet is attached to the spoke part on the back side of the surface where the spoke part faces the stator, and the iron core is in a direction to reduce the gap due to the attractive force of the stator acting on the iron core. It is also effective to include an engaging portion (12b) that comes into contact with the back side of the surface of the permanent magnet attached to the spoke portion so as to prevent the permanent magnet from coming off.
In any one of the above-described configurations, it is preferable that the engaging portion of the iron core is formed by a protrusion protruding from the iron core in the circumferential direction of the rotor or in the radial direction.
Further, the permanent magnet is configured such that the thickness in the axial direction decreases toward the radially inner side of the rotor, and the spoke portion of the support member has a thickness in the axial direction toward the radially inner side of the rotor. It is effective to use a configuration that increases

According to the axial gap rotating electrical machine of the present invention, it is possible to obtain a compact rotor structure in which a rotor core and permanent magnets divided into the number of poles are bundled together with a support member without a back yoke and connected to a rotating shaft. In addition, the shape of connecting the annular part of the outer periphery of the support member to the hub part by the spoke part eliminates the need for a back yoke-like component that adds additional thickness to the thickness of the iron core in the axial direction. As described above, the rotor core and the permanent magnet can be prevented from being scattered by centrifugal force without increasing the thickness of the rotor.
Further, in the configuration in which the engaging portion is provided in the iron core, the rotor iron core is prevented from being adsorbed in the direction of filling the gap by the suction force of the stator, and the structure does not depend on the means for attaching the iron core to the support member. Therefore, it is possible to reliably hold the gap.

  In the rotor support member of the present invention, the hub portion of the rotor support member is in contact with the rotating shaft within the range of the axial length of the rotor core in order to reduce surface blurring of the rotor end surface facing the gap with respect to the stator end surface. It is desirable to lengthen the length of the fitting portion as long as possible. In addition, it is effective to arrange the spoke portion so as to be connected to the hub portion and the annular portion through a space formed between the iron core and the permanent magnet. The reason for adopting such a spoke arrangement is as follows.

  In an axial gap rotating electrical machine, the rotor core must have an axial thickness that does not cause magnetic saturation, and in the rotor structure that is the premise of the present invention in which the magnets are arranged with the magnetic poles oriented in the circumferential direction. The thickness of the iron core tends to be thicker than the thickness of the permanent magnet in the rotor axial direction. Therefore, when the thickness of the iron core is determined so as not to cause magnetic saturation, the iron core is thicker than the permanent magnet as the axial thickness. For this reason, if only the magnetic characteristics are taken into consideration, a space is generated in a portion surrounded by the iron core and the magnet adjacent in the rotor axial direction. The main feature of the present invention is that a spoke portion that supports the annular portion of the rotor is disposed in the space resulting from the magnetic characteristics, and that the extra magnetically specific space is used for a structure that strongly supports the rotor. To do.

  By adopting the above configuration, the rotor support member has a shape that fits within the axial thickness of the rotor core, so that it has excellent suction resistance and centrifugal resistance without impairing the compactness of the magnet embedding. High strength can be a rotating electrical machine configuration.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment. FIG. 1 shows a schematic cross section of a rotating electrical machine. FIG. 2 is an exploded perspective view of the rotor structure. Further, FIG. 3 shows a rotor cross-sectional structure by developing a partial cross-section of the rotor on a plane. As shown in FIG. 1, the rotating electrical machine in this embodiment is configured as a double rotor type, and a pair of rotors 1 in which a permanent magnet 11 and an iron core 12 are arranged, and axial directions on opposite end faces of these rotors. And a stator 2 that faces opposite end faces across the gap.

  Both the rotors 1 have support members 13 that are fitted and supported by a plurality of cores 12 separated from each other and connected to the rotary shaft 10. The permanent magnet 11 is attached to the support member 13 between the iron cores 12 in the rotor circumferential direction with the magnetic poles oriented in the rotor circumferential direction (direction perpendicular to the paper surface in FIG. 1). The support member 13 has an annular portion 13b that supports the outer periphery in order to prevent scattering due to the centrifugal force applied to each iron core 12.

  The support member 13 has a spoke portion 13c that connects a hub portion 13a and an annular portion 13b that are fitted to the rotary shaft 10, and the spoke portion is located between adjacent iron cores 12 and the iron cores as shown in FIG. A space in the radial direction of the rotor surrounded by the arranged permanent magnets 11 extends in the radial direction, and the adjacent iron cores 12 are not in contact with each other.

  In other words, the support member 13 has a spoke portion 13c that connects the hub portion 13a and the annular portion 13b that are fitted into the rotary shaft 10, the permanent magnet 11 is disposed along the spoke portion 13c, and the iron core 12 is In the space surrounded by the hub portion 13a, the spoke portion 13c, and the annular portion 13b, they are spaced apart from each other.

  In this embodiment, the iron core 12 is supported on the back side of the surface where the support member 13 faces the stator 2 in order to prevent the stator 2 acting on the iron core from coming out in the direction of decreasing the gap G due to the suction force. The engaging part 12a which contacts the member 13 is provided. The permanent magnet 11 is attached to the surface side where the spoke portion 13 c faces the stator 2.

  Further, the detailed configuration will be described for each part. Referring to FIG. 1, a case 3 that accommodates a rotor 1 and a stator 2 is configured to rotatably support both ends of a rotary shaft 10 into which a support member 13 of the rotor 1 is fitted via a bearing 6. ing.

  The stator 2 has an annular shape as a whole by arranging a coil 22 wound around a generally iron-shaped iron core 21 in the axial direction in the circumferential direction by the desired number of poles. It is set as the structure attached and supported to the case 3 via. In FIG. 1, the iron core 21 of the stator 2 is formed by laminating thin electromagnetic steel plates in the circumferential direction or the radial direction, or is formed of a soft magnetic composite material.

  As shown in FIG. 2, each of the pair of rotors 1 includes a permanent magnet 11 corresponding to the number of poles, the same number of iron cores 12, and a support member 13 that supports them. The shape of the permanent magnet 11 is not particularly limited. In this example, the permanent magnet 11 is a rod having a rectangular cross section, and the spokes of the rotor support member 13 are oriented in the radial direction (rotor radial direction). The front surface of the portion 13c, that is, the spoke portion 13c is disposed on the surface facing the stator. When the permanent magnet is arranged in this way, the spoke portion 13c can be arranged at a position away from the gap between the stator and the rotor in the axial direction by the thickness of the permanent magnet. As the position where the member is arranged is closer to the air gap, eddy currents are more likely to be generated in the member, causing a reduction in motor efficiency. By dividing the permanent magnet, the eddy current generated inside can be kept low, but the spoke portion 13c cannot be divided because it connects the hub portion 13a and the annular portion 13b. Therefore, in the above configuration, the eddy current generated in the spoke portion 13c can be reduced by moving the spoke portion 13c away from the gap, and there is an effect that the efficiency of the motor can be prevented from being lowered.

  The iron core 12 is configured by laminating electromagnetic steel plates or using a soft magnetic powder material. The shape is generally fan-shaped when viewed in the axial direction, and the thickness in the axial direction is greater than the total thickness of the permanent magnet 11 and the spoke portion 13c of the support member 13. Yes. An engaging portion 12 a that contacts the support member 13 is provided on the end surface side opposite to the surface (back side) of the iron core 12 facing the iron core 21 of the stator 2. The engaging portion 12 a is formed by a protrusion that protrudes from each iron core 12. Since the configuration is schematically shown in FIG. 1, unlike the other drawings, this protrusion is depicted as extending in the radial direction. However, this protrusion actually protrudes in the rotor radial direction and the support member is annular. It may be in contact with the end surfaces of the portion 13b and the hub portion 13a, or may be projected in the circumferential direction of the rotor and engaged with the spoke portion 13c of the support member 13 as shown in FIGS. Further, the protrusions may be continuous as shown in FIG. 2, or may be local or intermittent. In particular, in order to reduce the magnetic flux short circuit from the engaging portion, as shown in the schematic cross-sectional view 1, the rotor extends in the radial direction of the rotor so as to abut the support member in the axial direction on the inner diameter side and the outer diameter side. It is effective to provide a protruding engagement portion.

  The support member 13 is made of a nonmagnetic metal material, and includes a hub portion 13a that constitutes a portion that fits into the rotary shaft 10, an annular portion 13b that contacts the outer peripheral side of the permanent magnet 11 and the iron core 12, and a spoke portion 13c that connects them. Are integrally provided. The hub portion 13a extends a predetermined length from the connecting portion with the spoke portion 13c to one side in the axial direction in order to prevent the surface of the rotor facing the gap of the rotor from rotating. It is fixed to the shaft 10 by a detent means such as spline engagement. The annular portion 13b has a longer width in the axial direction than the spoke portion, which is the thinnest portion of the support member, and the radial thickness is a thickness necessary for maintaining strength.

  The spoke portion 13c extends radially from the outer periphery of the hub portion 13a, thereby forming a fan-shaped core insertion space between the outer periphery of the hub portion, the inner periphery of the annular portion, and the circumferential surface of the adjacent spoke portion. is doing. The position of the spoke portion 13c in the axial direction is brought closer to the side farther than the surface facing the stator with respect to the axial width of the annular portion 13b. This positional shift is for securing a permanent magnet arrangement space on the side of the spoke portion 13c facing the stator 2.

  The permanent magnet 11, the iron core 12, and the support member 13 having such a structure are inserted until the iron core 11 is fitted into the fan-shaped space and the iron core engaging portion 12 a comes into contact with the back surface of the spoke portion, and between the adjacent iron cores 12 and the spoke portion. The integrated rotor 1 is configured by fitting the permanent magnet 11 in the space formed on the front surface of 13c and adhesively fixing it to the iron core 11 and / or the spoke portion 13c.

  As described above, the rotor core 12 is a molded product of a laminated steel plate or a soft magnetic composite material. The soft magnetic composite material in this case is effective in that the eddy current can be reduced although the strength is inferior. Conversely, laminated steel sheets have high strength, but in axial gap motors, if they are laminated in the axial direction as in radial gap motors, there is no effect of reducing eddy currents, so the laminating direction should be circumferential or radial. There is a need to. Various methods can be adopted as the lamination method.

  FIG. 4 shown next schematically shows a specific structural example in the case where the rotor core 12 has a laminated structure. In the case of this structure, even if a flat electromagnetic steel sheet S is laminated in the circumferential direction of the rotor as shown in FIG. 4A, the electromagnetic steel sheet curved concentrically as shown in FIG. 4B. Even if S is laminated in the rotor radial direction, or a flat electromagnetic steel sheet is curved in the rotor circumferential direction after being laminated, flat electromagnetic waves having different lengths as shown in FIG. The steel plates S may be stacked and may be generally fan-shaped so that the rotor radial direction is the stacking direction.

  FIG. 5 shown next is a cross-sectional view showing a specific example in which the configuration of the first embodiment is further specified. In this example, the case 3 is composed of two case portions, and one case portion 3A has an attachment portion 31 that protrudes from the peripheral wall in the inner diameter direction and has an attachment reference surface for fixing the stator 2. A bearing housing portion is provided on the radially inner side of the end wall. The other case portion 3B covers the open end side of the case portion 3A, and has a cylindrical bearing housing portion that projects into the case on the radially inner side of the end wall.

  The stator 2 is configured to be mounted and supported on a plate-like support member 23. The support member 23 has a plurality of bolt holes on its outer peripheral side, and is attached to the attachment portion 31 of one case 3A with a shim 4 that adjusts the axial position of the pair of rotors 1 by bolting. It is fixed.

  The pair of rotors 1 integrated as in the first embodiment are fitted into the rotary shaft 10 with the hub portions extending in the axial direction facing each other. The axial length of the two hub portions 13a together is such that a predetermined gap is generated between the opposing end surface of the embedded rotor core 12 and the opposite end surface of the stator core 21. Therefore, in this example, the hub portion 13 a constitutes a gap holding means for the pair of rotors 1.

  The rotating shaft 10 that supports the pair of rotors 1 is a shaft in which the peripheral surface portion into which the hub portion 13a of the support member 13 fits is slightly larger in diameter than the bearing support portion to the case 3, and is provided at one end of the large diameter shaft portion. A collar 10a is provided. The collar 10a is used for positioning the inner race of the bearing 6 on one end face thereof and the support member 13 of the rotor 1 on the other end face thereof. The axial length of the large-diameter shaft portion is set slightly shorter than the total length of the two hub portions 13a in the axial direction. Although not shown, the outer peripheral surface of the large-diameter shaft portion is provided with a detent means such as a spline, and the anti-rotation means such as a spline formed on the inner peripheral surface of the hub portion 13a. By the engagement, the pair of rotors 1 and the rotation shaft 10 can transmit torque without rotating relative to each other.

  The rotating shaft 10 is supported by the case 3 via a pair of angular ball bearings 6. As described above, the rotary shaft 10 is positioned with respect to the case portion 3A by bringing the collar 10a into contact with the inner race of one of the bearings.

  The rotary shaft 10 further includes a screw portion 10b for tightening the nut outside the bearing fitting portion. Further, a screw hole for fastening the bolt is formed in the end wall of the one case portion 3A, and a presser fitting 8 for fixing the outer race of the one bearing 6 to the case 3A is fixed to the screw hole with the bolt. It is said that.

  As a feature of this example, the permanent magnet 11 decreases in thickness in the axial direction toward the radially inner side of the rotor 1, and the spoke portion 13 c of the support member 13 faces toward the radially inner side of the rotor 1. Therefore, the thickness in the axial direction is increased.

  According to this configuration, since the section modulus of the spoke portion can be increased toward the radially inner side, the rigidity strength of the entire spoke portion can be increased, and surface blurring of the rotor against the air gap can be further reduced. Benefits that can be obtained.

  In addition, with this configuration, the magnet amount (volume) can be reduced on the inner diameter side than on the outer diameter side. There are two reasons why the amount of magnet can be reduced on the inner diameter side. One is that the smaller the radius from the rotating shaft, the less the effect that the force generated between the permanent magnet and the stator contributes to the motor torque. It is because the torque output with respect to the magnet amount of the whole motor can be increased by reducing the amount. Another reason is that the amount of magnetic flux at which the iron core reaches magnetic saturation is smaller toward the inner diameter side, so reducing the amount of magnet on the inner diameter side than the outer diameter side (that is, reducing the magnetic flux generated by the magnet) This is because it is possible to generate as much magnetic flux as possible and less than the allowable amount of magnetic flux leading to magnetic saturation. Here, the reason why magnetic saturation tends to occur on the inner diameter side is as follows. The iron core of the rotor and the stator has a fan shape when viewed from the axial direction, and the length of the arc of the fan becomes smaller toward the inner diameter side. Magnetic flux from the permanent magnet passes from the rotor core to the stator core in the axial direction across the gap. That is, the entire fan-shaped surface becomes a magnetic path, but the smaller the length of the fan-shaped arc toward the inner diameter side, the smaller the magnetic path cross-sectional area per radial unit length. This is because if the magnetic path cross-sectional area is small, the amount of magnetic flux leading to magnetic saturation is also small.

  In the first embodiment described above in detail, a compact rotor structure can be obtained in which the rotor core 12 and the permanent magnet 11 divided into the number of poles are bundled together by the support member 13 without the back yoke and connected to the rotary shaft 10. it can. Further, the shape of connecting the annular portion 13b on the outer periphery of the support member to the hub portion 13a by the spoke portion 13c eliminates the need for a back yoke-like component that adds further thickness to the thickness of the iron core 12 in the axial direction. The support member 13 for the rotor core 12 and the permanent magnet 11 is formed by the annular portion 13b pressing the rotor outer periphery of the rotor core 12 and the permanent magnet 11 without making the rotor 1 thicker than the thickness of the core 12. It is possible to prevent scattering due to centrifugal force without depending on the adhesive force to. Further, since the iron core 12 is provided with the engaging portion 12a, the iron core 12 of the rotor 1 is adsorbed in the direction of filling the gap by the suction force of the stator 2, and similarly, without depending on the adhesive force. It can prevent and can hold | maintain a space | gap reliably.

  Next, in Example 2 shown with reference to FIGS. 6 to 8, contrary to Example 1, the permanent magnet 11 is attached to the spoke part 13 c on the back side of the surface where the spoke part 13 c faces the stator 2. The iron core 12 is in contact with the back side of the surface of the permanent magnet 11 that is in contact with the spoke portion 13c in order to prevent the stator 2 acting on the iron core from coming out in the direction of decreasing the gap due to the attractive force. It is an example provided with the joint part 12b. Also in this example, since each component constituting the rotating electrical machine is the same as that of the first embodiment except for the detailed configuration of the support member 13, the description of each component is given the same reference numeral to the corresponding component. Instead of the description, only the difference in the detailed configuration of the support member 13 and the difference in the arrangement relationship will be described below.

  In the support member 13 in this example, the axial position of the spoke portion 13c is opposed to the stator 2 with respect to the axial width of the annular portion 13b, as opposed to that of the first embodiment with reference to FIG. It is brought closer to the surface. This arrangement is an arrangement for securing a permanent magnet arrangement space behind the surface facing the stator 2 of the spoke portion 13c and preventing the permanent magnet 11 from popping out due to centrifugal force in the rotor radial direction.

  In the case of this example, the permanent magnet 11, the iron core 12, and the support member 13 attach or attach the permanent magnet 11 to the spoke portion 13 c, and the engaging portion 12 b abuts the permanent magnet 11 in the aforementioned fan-shaped space. The integrated rotor 1 is configured by being fitted to the support member 13 by appropriate means such as bonding and bonding.

  At this time, the engaging portion 12b of the iron core 12 is formed in a protruding shape protruding in the circumferential direction of the rotor. Since the engaging portion 12b has a protruding shape extending in the circumferential direction, the protruding portion comes into contact with the permanent magnet 11 adjacent to the iron core 12 in the circumferential direction in the axial direction. Furthermore, when the structure which laminates | stacks the iron core 12 in a rotor radial direction like FIG.4 (B) or FIG.4 (C) is taken, each electromagnetic steel plate is shape | molded and laminated | stacked convexly seeing in a rotor radial direction. Thus, it is possible to manufacture an iron core having a protrusion-like engagement portion that easily extends in the circumferential direction of the rotor.

  In the second embodiment, the same effect as in the first embodiment can be achieved. In this embodiment, since the permanent magnet 11 is sandwiched between the spoke portion 13c and the engaging portion 12b of the iron core 12, the permanent magnet 11 is more firmly and securely compared to the structure of the first embodiment. The advantage that it can be fixed to the support member 13 is obtained.

  The present invention can be applied to a motor, a generator, or a motor generator for any application. However, in particular, an application in which the axial direction dimension of a rotating electrical machine is severely restricted, for example, a wheel motor built in a wheel in an electric vehicle, The present invention is particularly effective when used for a motor or a generator disposed on the same axis or parallel axis as the engine in the hybrid vehicle drive device.

1 is a schematic cross-sectional view of a double rotor type axial gap rotating electrical machine according to a first embodiment of the present invention. It is a disassembled perspective view which shows the structure of the rotor of the said rotary electric machine. It is a fragmentary sectional view which shows the structure of the rotor of the said rotary electric machine. It is a model front view which shows the various laminated structure of a rotor core. It is sectional drawing which shows the structure of the modification of the rotary electric machine of Example 1. FIG. 6 is a schematic cross-sectional view showing a configuration of a rotating electrical machine of Example 2. FIG. It is a disassembled perspective view which shows the structure of the rotor of the said rotary electric machine. It is a fragmentary sectional view which shows the structure of the rotor of the said rotary electric machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotor 2 Stator 10 Rotating shaft 11 Permanent magnet 12 Iron core 12a, 12b Engagement part 13 Support member 13a Hub part 13b Annular part 13c Spoke part G Gap

Claims (7)

Axial comprising a rotor (1) in which a permanent magnet (11) and an iron core (12) are arranged, and a stator (2) whose end faces are opposed to each other with an axial gap (G) interposed between the end faces of the rotor. In gap rotating electrical machines,
The rotor has a support member (13) for fitting and supporting a plurality of the iron cores separated from each other and connecting to the rotation shaft (10),
The permanent magnet is attached to the support member between the iron cores in the rotor circumferential direction with the magnetic poles oriented in the rotor circumferential direction,
The support member includes an annular portion (13b) that supports the outer periphery and a spoke portion (13c) that connects the annular portion with the hub portion (13a) fitted to the rotating shaft in order to prevent scattering due to centrifugal force applied to the iron core. )
The permanent magnet is disposed along the spoke part,
The axial gap rotating electrical machine according to claim 1, wherein the iron cores are spaced apart from each other in a space surrounded by a hub portion, a spoke portion, and an annular portion . Before SL core, in order to prevent the exit in the direction to reduce the gap by the suction force of said stator acting on heart iron, into contact with the support member in the back surface of the support member opposed to the stator the axial gap rotary electric machine of claim 1 Symbol mounting, characterized in that it comprises engaging portion (12a). The axial gap rotating electrical machine according to claim 2 , wherein the permanent magnet is attached to a surface side where the spoke portion faces the stator. The permanent magnet is attached to the spoke part on the back side of the surface where the spoke part faces the stator,
The iron core has an engagement portion that contacts the back side of the surface of the permanent magnet that is in contact with the spoke portion so as to prevent the stator from acting in the iron core from pulling out in the direction of decreasing the gap due to the attractive force of the stator. characterized in that it comprises the (12b), axial gap rotary electric machine of claim 1, wherein. 5. The axial gap rotating electrical machine according to claim 2 , wherein the engaging portion of the iron core is constituted by a protrusion protruding from the iron core in a circumferential direction of the rotor. The axial gap rotating electrical machine according to claim 2 or 3 , wherein the engaging portion of the iron core is constituted by a protrusion extending from the iron core in the rotor radial direction. The permanent magnet reduces the thickness in the axial direction toward the radially inner side of the rotor,
The axial gap rotation according to any one of claims 1 to 5 , wherein the spoke portion of the support member increases in thickness in the axial direction toward a radially inner side of the rotor. Electric.

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