JP2007037210A - Rotor for dynamo-electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor for a dynamo-electric machine which is possible of high-speed revolution by reducing the tensile force added to fragile material at high-speed revolution, in a rotor which is made by integrating ductile material and fragile material. <P>SOLUTION: In the rotor of the dynamo-electric machine which is made by arranging a member consisting of fragile material and a member consisting of ductile material on a rotational plane, a contact part between the member consisting of the fragile material and the member consisting of ductile material is made in such form that the shifting in the rotating shaft direction of the member consisting of ductile material can be regulated by the arrangement of the member consisting of fragile material, and the member consisting of fragile material and the member consisting of ductile material are put in contact form thereby being retained by their form. The contact parts of the member consisting of fragile material and the member consisting of ductile material are coupled with each other by low elastic-modulus adhesive which is transformable at addition of centrifugal force. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotor of a rotating electrical machine, and more particularly to a rotor of an axial gap type rotating electrical machine.

Conventionally, an axial gap type rotating electrical machine in which a rotor and a stator are arranged to face each other in the axial direction is known.
7A and 7B show a conventional axial gap type rotating electrical machine, wherein FIG. 7A is a sectional view taken along the axial direction, FIG. 7B is a plan view of the rotor, and FIG. 7C is a sectional view taken along the line A-O in FIG. FIG. 4D is a cross-sectional view taken along line B-O in FIG. As shown in FIG. 7, a rotor 1 of a conventional axial gap type rotating electrical machine is formed by a disk-shaped plate 2 formed of laminated steel plates and a plurality of magnets 3 arranged radially on the plate 2 (( a), see (b)).

  The magnet 3 has a shape matched to a plurality of through holes arranged radially on the plate 2, and after being inserted and arranged in each through hole, the contact surface with the plate 2 is bonded with an adhesive. Further, a bridge 4 made of a long plate-like soft magnetic powder material is disposed between the magnets 3 adjacent to each other in the circumferential direction (see (b) and (d)). Contact surfaces of the plate 2 and the magnet 3 and the bridge 4 are bonded with an adhesive.

  Further, on the inner peripheral side of the magnet 3 inserted and disposed in each through hole, a collar 5 that is a non-magnetic material is disposed so as to sandwich the plate 2 in order to improve the rigidity in the rotation axis direction of the plate 2. (See (a), (c), (d)). The collar 5 is fixed to the magnet 3 or the bridge 4 with an adhesive. A pair of annular members (rings) sandwiching the plate 2 from both sides so that the outer edges of the magnet 3 and the bridge 4 and the plate 2 are integrally held on the outer peripheral side of the magnet 3 in order to improve rotational strength. 6 and 6 are mounted (see (a), (c) and (d)). The plate 2, the magnet 3, the bridge 4 and each ring 6 are connected by an adhesive.

As such an axial gap type rotating electrical machine, for example, an “axial gap rotating electrical machine” (see Patent Document 1) is known.
JP-A-6-38418

  However, in the conventional axial gap type rotating electrical machine, the contact surfaces between all parts of the plate 2, the magnet 3, the bridge 4, the collar 5, and the ring 6 are integrally formed by bonding with an adhesive. When the centrifugal force and the axial force accompanying the magnetic force are received, the magnet 3 and the bridge 4 made of a brittle material and the plate 2 and the ring 6 made of a ductile material have to be similarly deformed.

  8A and 8B show the rotor of FIG. 7B, where FIG. 8A is a partial plan view, FIG. 8B is a cross-sectional view taken along line CC of FIG. 7A, and FIG. FIG. 4D is a cross-sectional view taken along line B-O in FIG. As shown in FIG. 8, the plate 2 and the ring 6 made of a ductile material are integrally formed adjacent to or sandwiched between the magnet 3 and the bridge 4 made of a brittle material (see (a) and (b)).

  That is, when the plate 2 or the ring 6 made of a ductile material is deformed in the radial direction by receiving centrifugal force, the tensile stress ((d) is applied to the magnet 3 or the bridge 4 made of a brittle material according to the amount of deformation. However, the tensile strength of the bridge 4 made of a dust material is weaker than the tensile strength of the plate 2. For this reason, the bridge 4 cannot follow the elongation of the plate 2 and breaks (see (c) and (d)).

As described above, the rotational strength as a whole is determined by the tensile strength of the bridge 4 made of the dust material. In the rotor formed by integrating the ductile material and the brittle material, the tensile force applied at the time of high rotation is applied. Since the brittle material cannot withstand the force, it was difficult to increase the rotation speed.
An object of the present invention is to provide a rotor for a rotating electrical machine that can increase the rotation speed by reducing the tensile force applied to the brittle material during high rotation in a rotor formed by integrating a ductile material and a brittle material. It is to be.

  In order to achieve the above object, a rotor of a rotating electrical machine according to the present invention is a rotor of a rotating electrical machine formed by arranging a member made of a brittle material and a member made of a ductile material on a rotating plane. A contact portion between the member made of the ductile material and the member made of the ductile material is formed in a shape capable of restricting movement of the member made of the ductile material in the rotation axis direction by the arrangement of the member made of the brittle material. And a member made of the ductile material are brought into contact with each other and held in shape.

  According to this invention, a rotor of a rotating electrical machine formed by arranging a member made of a brittle material and a member made of a ductile material on a rotation plane has a contact portion between the member made of the brittle material and the member made of the ductile material, It is formed in a shape that can restrict the movement of the member made of ductile material in the rotation axis direction by the arrangement of the member made of brittle material, and the shape is made by bringing the member made of the brittle material and the member made of the ductile material into contact with each other Retained. Thereby, in the rotor formed by integrating the ductile material and the brittle material, it is possible to increase the rotation speed by reducing the tensile force applied to the brittle material at the time of high rotation.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1A and 1B show a rotor of a rotating electrical machine according to an embodiment of the present invention, in which FIG. 1A is a partial plan view, FIG. 1B is a cross-sectional view taken along line DD in FIG. It is sectional drawing which follows the EE line | wire of (a). As shown in FIG. 1, a rotor (rotor) 10 of an axial gap type rotating electrical machine has, for example, a plate 11 formed in an external gear shape from laminated steel plates, and a plurality of magnets 12 incorporated in the plate 11. (See (a)).

  The plate 11 includes a ring-shaped portion (not shown) through which the rotating shaft passes, and a plurality of beam-shaped portions (not shown) that extend radially from the ring-shaped portion in the form of spokes of wheels and are adjacent at equal intervals in the circumferential direction. Have. The magnet 12 has a cross-sectional shape that matches the shape of the space formed between the adjacent beam-shaped portions, and is inserted between the adjacent beam-shaped portions. A bridge 13 made of a long plate-like soft magnetic powder material is attached to the beam-like portion so as to be sandwiched from both the front and back sides (see (a) and (b)).

  In addition, a collar 14 made of a non-magnetic material is attached to the plate 11 on the inner peripheral side of the magnet 12 so as to sandwich the plate 11 from both the front and back sides (( a) and (c)). In order to increase the rotational strength of the rotor 10 on the outer peripheral side of the magnet 12, a bridge member 13 that sandwiches the plate 11 and an annular member that sandwiches these from both front and back sides so as to integrally hold the outer edge portion of the magnet 12. A ring 15 is attached (see (a) and (c)).

  The contact portion between the magnet 12 and the bridge 13 is formed in a shape that allows the magnet 12 to hold down the bridge 13. For example, the bridge 13 has both contact surfaces inclined outward, that is, has a trapezoidal cross section (see (b)) with a wide width on the plate 11 side (bottom side), or has a stepped step surface. The magnet 12 has a pulley shape (see (b)) corresponding to the shape of the bridge 13, in which both contact surfaces are inclined inward, that is, the width of the central portion in the thickness direction is the narrowest. Alternatively, it is formed with a back side stepped step surface.

That is, in a rotor of a rotating electrical machine formed by arranging a member made of a brittle material and a member made of a ductile material on a rotation plane, a contact portion between the member made of the brittle material and the member made of the ductile material is made of the brittle material. It is formed in a shape that can regulate the movement of the member made of ductile material in the rotation axis direction by the arrangement of the member, and is held in shape by bringing the member made of the brittle material and the member made of the ductile material into contact. The
The beam-like portion of the plate 11 and the contact portion a (see (b)) of the bridge 13 and the contact portion b (see (b)) of the magnet 12 and the bridge 13 are bonded with a low elastic modulus such as acrylic or urethane. It is bound by the agent.

  2 shows a divided structure of the magnet of FIG. 1, (a) a sectional view similar to FIG. 1 (b), and (b) a sectional view similar to FIG. 1 (c). As shown in FIG. 2, the magnet 12 is divided into two in the direction of the rotation axis in consideration of assembly convenience (see (a)), and is assembled so as to sandwich the bridge 13 from the front and back sides (( a) See arrows). The magnet 12 divided into two parts is joined by, for example, a high-strength adhesive such as an epoxy resin or welding, and is integrated with an adhesion / weld layer 12a interposed therebetween (see (b) arrow).

  The contact portions between the magnet 12 and the collar 14 and each ring 15 are formed in a shape that allows the collar 14 and each ring 15 to press the magnet 12. For example, each magnet 12 has a stepped step surface (see (b)) on both contact surfaces, or an outward slope, that is, a trapezoid with a wide width on the adhesion / weld layer 12a side (bottom surface side). The collar 14 and each ring 15 have a step-like stepped surface (see (b)) corresponding to the shape of the magnet 12, or both side surfaces are inward. Inclined, that is, has a trapezoidal cross section with a wide width on the bonding / welding layer 12a side.

  The ring 15 has an L-shaped cross section so as to have a back-side stepped step surface, and is installed so as to sandwich the magnet 12 from both the front and back sides of the magnet 12 (see (b) arrow). The ring 15 has an L-shaped cross-section so that the contact surface with the magnet 12 is substantially parallel to and substantially orthogonal to the rotation axis, and each contact surface is made of a high-strength adhesive such as an epoxy resin system. Join by. In addition, the rings 15 sandwiching the magnet 12 are bonded by, for example, a high-strength adhesive, but may be bonded by welding or the like from the outer peripheral side, and are integrated with an adhesive / weld layer 15a interposed therebetween (FIG. 1 ( c)).

  The collar 14 is made of stainless steel such as SUS303 or SUS304, which is a non-magnetic material, and has an inclined surface in which the thickness of both surfaces increases equally toward the rotation axis. It is installed so as to be sandwiched (see arrow (b)). The contact portion c (see FIG. 1C) between the collar 14 and the magnet 12 and the bridge 13 is arranged so that the contact surface is substantially parallel to and substantially orthogonal to the rotation axis in the same manner as the contact surface with the ring 15. The contact surfaces that are formed and are substantially orthogonal to the rotation axis are bonded by, for example, an acrylic or urethane low elastic modulus adhesive. The collar 14 is fastened and fixed to the plate 11 by screwing a non-magnetic bolt into a screw hole that penetrates both the plate 11 and the collar 14.

  FIG. 3 shows another example of the magnet of FIG. 2, (a) is a plan view when the magnet is mounted, and (b) is a cross-sectional view when the magnet is mounted. As shown in FIG. 3, if the plate 11 has a shape in which the magnet 12 can be inserted and disposed between the beam-shaped portion 11a spreading in the radial direction and the beam-shaped portion 11a, the magnet 12 is moved from the outer peripheral edge. The beam-like part 11a can be slid into the ring-like part 11b as a guide (see (a) arrow) and incorporated. In this case, it is not necessary to divide the magnet 12 into two (see (b)). After the magnet 12 is assembled, the ring 15 is mounted so as to sandwich the magnet 12 from both sides (see arrow (b)).

Next, each effect | action in rotation operation | movement of the rotor 10 of the rotary electric machine which has the structure mentioned above is demonstrated.
Regarding the strength with respect to the rotation axis direction, when a force in the rotation axis direction applied by a stator (not shown) is applied to the magnet 12 and the bridge 13, first, a force in the rotation axis direction is applied to the bridge 13. At this time, since the bridge 13 is bonded and fixed to the plate 11, the displacement of the bridge 13 is restricted. However, since the adhesive that bonds the bridge 13 and the plate 11 is an elastic body, the adhesive is held only by this adhesive. Lack of power.

However, the bridge 13 is held by the magnet 12 on the side, the ring 15 on the outer periphery, and the collar 14 on the inner periphery, and the contact portion between the magnet 12, the ring 15, the collar 14 and the bridge 13 Since it has a shape that suppresses the movement in the direction of the rotation axis, the displacement of the bridge 13 in the direction of the rotation axis is restricted by the shape retention.
Regarding the displacement of the magnet 12 in the rotation axis direction, the magnet 12 is bonded to the plate 11 at the side surface, and the inner circumference and the outer circumference each have a shape that regulates the movement of the magnet 12 in the rotation axis direction. Since it is held by the ring 15, the displacement in the rotation axis direction is regulated by the shape holding.

  Regarding the effect on the centrifugal force, when the centrifugal force is applied to the rotor 10, first, the ring 15 located on the outermost periphery of the rotor 10 is deformed in the radial direction. When the ring 15 holding the shape on the outer periphery is displaced, the plate 11 positioned on the inner periphery is similarly deformed in the radial direction. At this time, since the low elastic modulus adhesive is deformed with the deformation of the plate 11, a large tensile stress is not generated in the bridge 13.

  Moreover, since the bridge 13 and the magnet 12 are fixed to the collar 14 with a low elastic modulus adhesive, when a centrifugal force is applied, the bridge 13 and the magnet 12 are displaced in the outer circumferential direction without being deformed, and the inner circumferential surface. The low elastic modulus adhesive material is deformed by the amount of displacement of the magnet 12 and the bridge 13. Thereby, the tensile stress applied to the magnet 12 and the bridge 13 made of a brittle material can be reduced.

  Further, the magnet 12 and the bridge 13 are displaced relative to the plate 11, but wear due to the relative displacement does not occur because a low elastic modulus adhesive is interposed on these sliding surfaces. It should be noted that the contact portion a and the contact portion b (see FIG. 1B), which are the sliding surfaces, are resistant to a vapor deposition of titanium, DLC (Diamond Like Carbon) treatment, or the like instead of the low elastic modulus adhesive. You may provide the surface on which the low-friction board | plates, such as the surface which gave the abrasion process, and the net | network plate which has a grinding | polishing surface, were affixed. Thereby, by sliding them, wear and friction can be reduced while allowing relative displacement of each component. Further, by replacing the low friction material with a material having insulating performance such as polyphenylene sulfide (PPS) or polyether ether ketone (PEEK) material, it is possible to reduce the loop loss generated around the magnet 12.

  Furthermore, a high-strength adhesive such as an epoxy resin is used for joining the contact portion d (see FIG. 1A) of the magnet 12 and the bridge 13 and the ring 15, but when a centrifugal force is applied, Since only compressive stress is applied to this part, it is not necessary to provide an elastic body on the contact surface. Rather, in order to increase the strength of the magnet 12 and the bridge 13 in the rotation axis direction, there is an advantage in firmly fixing with a high-strength adhesive.

  4A and 4B show another arrangement example of the magnet and the bridge. FIG. 4A is a plan view when the magnet is mounted, and FIG. 4B is a cross-sectional view when the magnet is mounted. As shown in FIG. 4, the rotor 20 of the rotating electrical machine does not include the plate 11 but directly combines the magnet 21, the bridge 22, and the collar 23. The magnets 21 and the bridges 22 are provided with mutual meshing structures that can be meshed with each other, such as notch shapes shifted in position so that they can be combined with each other, and alternately in the circumferential direction. Deploy.

  The inner peripheral portion of the magnet 21 and the bridge 22 is sandwiched and fixed from the front and back both sides by a pair of collars 23 and 23 made of a non-magnetic material, and the outer periphery is fixed from the front and back both sides by a pair of rings 15 and 15. Insert and fix. Both rings 15 and 15 are joined together by an epoxy resin adhesive or welding, and the joining surfaces of the ring 15 and the magnet 21 and the ring 15 and the bridge 22 are firmly fixed by the epoxy resin adhesive. The collars 23 may be coupled by bolting or the like in addition to an epoxy resin adhesive or welding.

  In the rotor 20, when a load in the rotation axis direction is applied to the magnet 21 or the bridge 22, the ring 15 is held on the outer peripheral side, the collar 23 is held on the inner peripheral side, and the magnet 21 and the bridge 23 are Since they are held in mesh with each other, displacement in the direction of the rotation axis can be regulated. In addition, when a centrifugal force is applied, the magnet 21 having a large volume and a heavy weight tends to be displaced in the outer circumferential direction from the light weight bridge 22, so that a relative displacement occurs between the magnet 21 and the bridge 22. However, since the magnet 21 and the bridge 22 are held in shape and are not joined by an adhesive or the like, no stress is generated.

  Further, the contact surface between the magnet 21 and the bridge 22 is similar to the effect of the rotor 10 by interposing a low elastic modulus adhesive, a low friction material, a surface treatment, an insulating material, etc., like the rotor 10 described above. The effect of can be obtained. Furthermore, since the rotor 20 does not include the electromagnetic steel plate 11 unlike the rotor 10, the loop loss generated on the outer periphery of the magnet 21 can be reduced.

  FIG. 5 is a cross-sectional view showing combinations (a) to (d) of the magnet and bridge shown in FIG. 4, and FIG. 6 shows a fixed state of the magnet or bridge shown in FIG. Is a sectional view of a magnet fixed state, and (b) is a sectional view of a bridge fixed state.

  As shown in FIG. 5, the magnet 21 and the bridge 22 are provided with a fitting shape that can restrict the movement of the bridge 22 in the direction of the rotation axis on the contact surface. For example, a combination of a bridge 22a having a cross-sectional shape of "D" and a magnet 21a having projections fitted on side recesses of the bridge 22a on both sides (see (a)), a bridge 22b having a circular cross-section A combination of magnets 21b having concave portions matched to the side surface shape of the bridge 22b on both side surfaces (see (b)), a bridge 22c having a substantially X-shaped cross section, and convex portions matching the side surface shape of the bridge 22c on both side surfaces A combination of magnets 21c (see (c)), a bridge 22d having a substantially O-shaped cross-section, and a combination of magnets 21d having concave portions matched to the side surfaces of the bridge 22d on both sides (see (d)), etc. It is.

  In the case of a combination of the bridge 22a and the magnet 21a (see (a)), even if a moment in the direction of the rotation axis (see the arrow in the figure) occurs, it can be held with high rigidity. In the case of the combination of the bridge 22b and the magnet 21b (see (b)), even if a load in the rotation axis direction is applied to the magnet 21b or the bridge 22b, the stress concentration on the contact surface between the magnet 21b and the bridge 22b is reduced. be able to. The same applies to the combination of the bridge 22c and the magnet 21c (see (c)) and the combination of the bridge 22d and the magnet 21d (see (d)). The magnet 21c (21d) and the bridge 22c ( The stress concentration on the contact surface 22d) can be reduced.

As described above, the rotor 10 (20) of the rotating electrical machine is configured so that no tensile stress is applied to the magnet 12 (21) or the bridge 13 (22). During rotation of the rotor, a force of several tens of kg · f is input to the magnets and bridges in the direction of the rotation axis, and centrifugal force accompanying rotation is added to each magnet. However, the tensile strength of magnets and bridges is lower than that of ductile materials such as rings, plates, and collars, so that tensile stress was not applied to them.
That is, the contact portion between the brittle material and the ductile material having different tensile strengths is held by a sliding structure or a flexible structure, and further, a high-strength member is attached to the outer peripheral portion to restrict radial displacement, whereby the rotor Can be rotated at a high speed.

The rotor of the rotating electrical machine according to the present invention is a rotor of a rotating electrical machine formed by arranging a member made of a brittle material and a member made of a ductile material on a rotation plane, and the rotor made of the brittle material and the ductile material. Forming a contact portion of the member formed into a shape capable of restricting movement of the member made of the ductile material in the rotation axis direction by arranging the member made of the brittle material, and the member made of the brittle material and the ductile material The member consisting of was brought into contact and held in shape.
As a result, when centrifugal force is applied to the rotor, only the compressive stress acting in the outer peripheral direction is generated in the bridge and magnet made of the compact, so that the rotational strength of the rotor is improved. Moreover, since no adhesive is used, the cost and time required for assembly can be reduced.

  Moreover, the contact part of the member consisting of the brittle material and the member consisting of the ductile material was bonded with a low elastic modulus adhesive that can be deformed when a centrifugal force is applied. Thereby, since the low elastic modulus adhesive follows the deformation amount of the ductile material generated when centrifugal force is applied to the rotor, the tensile force applied to the bridge and magnet made of the green compact can be reduced. Moreover, since the bridge | bridging which consists of a magnet and a compact is couple | bonded by the low elastic modulus adhesive agent, sliding of a coupling surface can be suppressed.

  Moreover, the contact part of the member which consists of the said brittle material, and the member located in an outer peripheral part was joined so that both might be integrated. Thereby, rotational strength improves. Since only the compressive force is applied to the contact surface of the ring and the bridge made of a magnet or a compact in the outer periphery, by using a high-strength adhesive at this part, the rotational strength and the rotational axis direction can be effectively increased. Strength can be improved.

  Further, at least one of the inner and outer peripheral surfaces of the member made of the brittle material, which is formed in a contact portion between the member made of the brittle material and the member made of the ductile material, is arranged orthogonally to the direction of the rotation axis. . Thereby, even when the ring or the plate is deformed by the centrifugal force, the displacement of the magnet in the direction of the rotation axis can be restricted in the same manner as when the magnet is not deformed.

  In addition, when the member made of the brittle material is displaced with respect to the member made of the ductile material by application of centrifugal force, at least one of the sliding surface of the member made of the brittle material and the member made of the ductile material, A treatment for reducing the friction coefficient of the sliding surface was performed. As a result, when a plate of low friction material is fixed as a treatment, wear generated on the contact surface can be reduced when a bridge made of a magnet and a compacted body causes relative displacement with respect to the plate due to centrifugal force or the like. When the surface treatment is performed, the wear between the bridge and the plate made of a magnet and a compact can be reduced without increasing the number of parts.

The process of reducing the friction coefficient is performed by attaching a low friction member made of an insulator to the sliding surface. Thereby, the loop current and eddy current generated around the magnet can be reduced, and a highly efficient rotor can be configured.
In addition, the contact portion between the magnet and the bridge is provided with a fitting shape that can be combined with the magnet to restrict the movement of the bridge in the rotation axis direction, and the magnet holds the bridge. Thereby, the displacement of the bridge made of the soft magnetic powder material in the rotation axis direction can be regulated.

  As described above, according to the present invention, a rotor of a rotating electrical machine formed by arranging a member made of a brittle material and a member made of a ductile material on a rotation plane includes a member made of a brittle material and a member made of a ductile material. The contact portion is formed in a shape that can restrict movement of the member made of the ductile material in the rotation axis direction by the arrangement of the member made of the brittle material, and the member made of the brittle material and the member made of the ductile material are brought into contact with each other. In this way, the rotor is formed by integrating the ductile material and the brittle material, so that it is possible to increase the rotation speed by reducing the tensile force applied to the brittle material at the time of high rotation.

The rotor of the rotary electric machine which concerns on one embodiment of this invention is shown, (a) is a fragmentary top view, (b) is sectional drawing which follows the DD line | wire of (a), (c) is (a). It is sectional drawing which follows the EE line. FIG. 2 shows a divided structure of the magnet of FIG. 1, (a) a sectional view similar to FIG. 1 (b), and (b) a sectional view similar to FIG. 1 (c). The other example of the magnet of FIG. 2 is shown, (a) is a top view at the time of magnet mounting, (b) is sectional drawing at the time of magnet mounting. The other example of arrangement | positioning of a magnet and a bridge | bridging is shown, (a) is a top view at the time of magnet mounting, (b) is sectional drawing at the time of magnet mounting. It is sectional drawing which shows the example (a)-(d) of the combination of the magnet and bridge | bridging of FIG. 4A and 4B show a state where the magnet or bridge of FIG. 4 is fixed by a collar and a ring, where FIG. 5A is a cross-sectional view of the magnet fixed state, and FIG. A conventional axial gap type rotating electrical machine is shown, (a) is a cross-sectional view along the axial direction, (b) is a plan view of the rotor, (c) is a cross-sectional view along line A-O in (b), (d ) Is a sectional view taken along line B-O in FIG. FIG. 7B shows the rotor, FIG. 7A is a partial plan view, FIG. 7B is a cross-sectional view taken along the line CC of FIG. 7A, and FIG. ) Is a cross-sectional view taken along line B-O in FIG.

Explanation of symbols

10, 20 Rotor 11 Plate 11a Beam-shaped portion 11b Ring-shaped portion 12, 21, 21a, 21b, 21c, 21d Magnet 12a, 15a Adhesive / welded layer 13, 22, 22a, 22b, 22c, 22d Bridge 14, 23 Color 15 Ring member a, b, c, d Contact part

Claims (9)

In a rotor of a rotating electrical machine formed by arranging a member made of a brittle material and a member made of a ductile material on a rotation plane,
A contact portion between the member made of the brittle material and the member made of the ductile material is formed in a shape that can restrict movement of the member made of the ductile material in the rotation axis direction by arranging the member made of the brittle material. A rotor of a rotating electrical machine in which a member made of the brittle material and a member made of the ductile material are held in shape in a contact state.   The rotor for a rotating electrical machine according to claim 1, wherein a contact portion between the member made of the brittle material and the member made of the ductile material is bonded by a low elastic modulus adhesive that can be deformed when a centrifugal force is applied.   The rotor of the rotary electric machine according to claim 1 or 2, wherein contact portions between the member made of the brittle material and the member located on the outer peripheral portion are joined so as to be integrated with each other.   The rotation axis direction surface of at least one of the inner and outer circumferences of the member made of the brittle material, which is formed at a contact portion between the member made of the brittle material and the member made of the ductile material, is arranged orthogonal to the rotation axis direction. The rotor of the rotary electric machine as described in any one of 1-3.   When the member made of the brittle material is displaced with respect to the member made of the ductile material by applying a centrifugal force, the sliding is made on at least one of the sliding surfaces of the member made of the brittle material and the member made of the ductile material. The rotor for a rotating electrical machine according to any one of claims 1 to 4, wherein a process for reducing a friction coefficient of a surface is performed.   The rotor of a rotating electrical machine according to claim 5, wherein the process of reducing the friction coefficient is performed by mounting a low friction member made of an insulator on the sliding surface.   The member made of the brittle material is a magnet radially arranged on the rotating plane and a bridge made of a green compact arranged between the adjacent magnets, and the member made of the ductile material is the magnet The rotor for a rotating electrical machine according to any one of claims 1 to 6, wherein the rotor is a collar disposed on the inner periphery and a ring disposed on the outer periphery.   The member made of the brittle material is a magnet radially arranged on the rotating plane and a bridge made of a green compact arranged between the adjacent magnets, and the member made of the ductile material is the magnet The rotor of the rotating electrical machine according to any one of claims 1 to 6, which is a plate on which is mounted, a collar disposed on an inner periphery of the magnet, and a ring disposed on an outer periphery.   The contact portion between the magnet and the bridge is provided with a fitting shape that can be combined with the magnet to restrict movement of the bridge in the rotation axis direction, and the bridge is held by the magnet. The rotor of the rotary electric machine as described in 2.

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