JP2008289286A - Permanent magnet type electric rotating machine, rotor, and manufacturing method for rotor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a rotor for a permanent magnet type electric rotating machine, capable of assembling a plurality of rotor blocks with high concentricity without requiring rotating shafts of various shaft lengths. <P>SOLUTION: In this rotor 500 for the permanent magnet type electric rotating machine which is formed in a disc shape having a center hole 50a, and includes a plurality of stacking rotor blocks 55 in which a plurality of permanent magnets 51 are disposed at an outer periphery portion or an inner periphery portion, the rotor blocks 55 have a recessed portion 58 or a protruding portion 57 which concentrically positions the adjacent rotor blocks 55, 55 with each other by fitting with each other on a laminated surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a permanent magnet type rotating electrical machine, a rotor thereof, and a method for manufacturing the rotor.

  Conventionally, there is a permanent magnet type rotating electrical machine in which a rotor is provided with a permanent magnet. This rotor is composed of a rotor core (field yoke) made of a magnetic material and a permanent magnet, and the permanent magnet is adjacent to the outer peripheral portion (inner peripheral portion in the case of an inner rotor) in the circumferential direction. The magnetic poles to be arranged are arranged at a predetermined circumferential pitch so that the magnetic poles are different from each other. The permanent magnet may be attached to the outer peripheral surface or inner peripheral surface of the rotor core, or may be embedded in the outer peripheral portion or inner peripheral portion of the rotor core.

  Among the above-mentioned rotors, in particular, those having a large capacity and a long axial length include one in which a plurality of permanent magnets and a rotor core are stacked and connected in the axial direction to constitute one rotor. If the rotor is configured in this manner, changing the rotor shaft length has the advantage of obtaining rotating electric machines with various capacities having the same cross-sectional shape, and reducing the eddy current loss of the permanent magnet. There is a merit that you can.

  As a prior art of the above rotor, in a rotor of a permanent magnet rotating electrical machine in which a permanent magnet is disposed on the outer peripheral surface of a cylindrical rotor core and used as a field, a step portion with which one end surface of the permanent magnet abuts is provided. A plurality of iron core blocks each having an iron core configured to regulate the position of the permanent magnet in the axial direction by the stepped portion and a permanent magnet fixed to the iron core are arranged in the axial direction and attached to the rotating shaft. There exists what was comprised (for example, refer patent document 1).

  Further, as another conventional technique, a rotor for an electric motor including a rotor shaft and a rotor iron core that is integrally fixed to the rotor shaft and serves as a field magnetic flux generation source, wherein a magnetic steel plate is axially disposed. A laminated iron core formed by laminating a plurality of layers, a structural steel having substantially the same cross-sectional shape as the laminated iron core, and a shaft disposed at a predetermined interval in the circumferential direction of the laminated iron core and the structural steel, and a shaft A rotor core split piece formed by a plurality of openings formed to open in a direction and magnets respectively inserted into the plurality of openings, and the rotor core is the rotor core There is a configuration in which a plurality of divided pieces are combined in the axial direction of the rotor shaft (see, for example, Patent Document 2).

  As another prior art, a rotor core having a magnetic part and magnetically uneven in the circumferential direction and an armature coil passing between adjacent magnetic poles of the rotor core are provided to cancel out the magnetic flux. In a method for manufacturing a rotor of a permanent magnet type rotating electrical machine configured with a permanent magnet, a rotor core piece and a magnet piece by dividing the rotor and the permanent magnet into a plurality of parts in a direction orthogonal to the axial direction The rotor core piece and the magnet piece are bonded together to form a rotor piece, and the rotor pieces are sequentially overlapped to form the entire rotor (for example, Patent Document 3). reference).

  Conventionally, there is a rotating electrical machine whose rotating shaft is a hollow shaft. Even in such a rotating electric machine, by using a hollow shaft, a hollow shaft rotor can be manufactured by the techniques disclosed in Patent Documents 1 to 3.

Japanese Patent Application Laid-Open No. 08-333182 JP-A-2005-354806 JP 2002-359955 A

  However, according to the conventional techniques disclosed in Patent Documents 1 and 2, since a plurality of iron core blocks (iron core division pieces) are fastened via a rotating shaft, a plurality of rotating electric machines having different shaft lengths are manufactured. Therefore, it is necessary to prepare a plurality of rotating shafts having different axial lengths. For this reason, there is a problem that various parts inventory must be held.

  Further, according to the conventional technique disclosed in Patent Document 3, the rotor core pieces and magnet pieces having a flat overlapping surface are overlapped in the axial direction to assemble the rotor, and therefore, a plurality of rotor core pieces and There is a problem that it is difficult to accurately assemble the concentricity between the magnet piece and the rotating shaft.

  The present invention has been made in view of the above, and does not require a plurality of rotating shafts having different axial lengths, and rotation of a permanent magnet type rotating electrical machine that can assemble concentricity of a plurality of rotor blocks with high accuracy. It aims at obtaining the manufacturing method of a child, a permanent magnet type rotating electrical machine, and a rotor.

  In order to solve the above-described problems and achieve the object, the present invention includes a plurality of rotor blocks formed in a disk shape having a center hole and having a plurality of permanent magnets arranged on the outer peripheral portion or the inner peripheral portion. In the rotor of the permanent magnet rotating electric machine, the rotor block is formed with a concave portion or a convex portion on the overlapping surface to fit each other and position adjacent rotor blocks concentrically. And

  According to the present invention, it is possible to obtain a rotor of a permanent magnet type rotating electrical machine that does not require a plurality of rotating shafts having different axial lengths and can assemble concentricities of a plurality of rotor blocks with high accuracy. .

  Hereinafter, embodiments of a rotor of a permanent magnet type rotating electrical machine, a permanent magnet type rotating electrical machine and a method of manufacturing a rotor according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a front view showing a first embodiment of a rotor block according to the present invention, FIG. 2 is a longitudinal sectional view of the rotor of the first embodiment, and FIG. It is a longitudinal cross-sectional view which shows the decomposition | disassembly state (before an assembly) of a rotor.

  The iron core block 20 is formed by forming a magnetic material such as silicon steel into a disk shape. At the center of the iron core block 20, a center hole 20a into which the rotary shaft 26 is fitted is formed. Further, a circular concave portion 28 is formed concentrically with the center hole 20a on one overlapping surface of the iron core block 20, and a circular convex portion 27 is formed concentrically with the central hole 20a on the other overlapping surface. . The inner diameter of the circular recess 28 and the outer diameter of the circular protrusion 27 are formed to be the same diameter with a dimensional tolerance of an intermediate fit of about H5 / h4.

  Further, the iron core block 20 is provided with screw holes 22 and 22 as holes parallel to the central axis Z for screwing bolts 24 as connecting members at positions symmetrical with respect to the central axis Z. Straight holes 23 and 23 that pass through the shaft of the bolt 24 and are parallel to the central axis Z, and counterbored holes 23 a and 23 a that receive the heads of the bolt 24 are formed at positions rotated by 90 ° from the position. The screw hole 22 and the straight hole 23 are provided near the inner periphery of the center hole 20a (when the rotor is an outer rotor, they are provided near the outer periphery of the iron core block 20).

  Four permanent magnets 21 having an inner peripheral surface 21c having the same curvature as the outer peripheral surface 20c are affixed at equal intervals on the outer peripheral surface 20c of the iron core block 20 at the same circumferential position as the screw hole 22 or the straight hole 23. (If the rotor is an outer rotor, it is affixed to the inner peripheral surface of the center hole 20a). The circumferential position of the screw hole 22 or the straight hole 23 is preferably the same as the circumferential position of the permanent magnet 21 in order to reduce the influence on the magnetic field, but may not be the same circumferential position.

  The axial length of the permanent magnet 21 is shorter than the axial length (thickness) of the iron core block 20, and the permanent magnet 21 is fixed to the central portion of the iron core block 20 in the axial direction (thickness direction). The permanent magnet 21 is magnetized so that magnetic poles adjacent in the circumferential direction are different from each other. The iron core block 20 to which the permanent magnet 21 is fixed will be referred to as a rotor block 25.

  Next, a method for assembling the rotor according to the first embodiment will be described with reference to FIG. First, the circular convex portion 27 of the rotor block 25 illustrated in the middle is fitted into the circular concave portion 28 of the rotor block 25 illustrated at the right end of FIG. Bolts 24 and 24 are passed through 23, screwed into the screw holes 22 and 22 of the rotor block 25 at the right end, the rotor blocks 25 and 25 are positioned in the circumferential direction, and the heads 24a and 24a of the bolts 24 and 24 are rotated in the middle. It accommodates in the counterbore holes 23a and 23a of the child block 25, and the rotor blocks 25 and 25 are fastened together. Since the head 24a of the bolt 24 is accommodated in the counterbore hole 23a, the head 24a does not get in the way when the next rotor block 25 is stacked.

  Next, the circular convex portion 27 of the rotor block 25 shown in the left end is fitted into the circular concave portion 28 of the rotor block 25 shown in the middle of FIG. 3, and the straight hole 23 of the rotor block 25 at the left end is fitted. , 23 are passed through the bolts 24, 24, screwed into the screw holes 22, 22 in the middle rotor block 25, the rotor blocks 25, 25 are circumferentially positioned, and the heads 24a, 24a of the bolts 24, 24 are positioned at the left end. The rotor blocks 25 are accommodated in the counterbore holes 23a, 23a, and the rotor blocks 25, 25, 25 are fastened together.

  Next, the rotary shaft 26 is inserted into the respective center holes 20a of the fastened rotor blocks 25, 25, 25, and the rotor 100 of Embodiment 1 as shown in FIG. 2 is manufactured. According to the rotor 100 of the first embodiment, by stacking the required number of single rotor blocks 25, it is possible to manufacture a rotor having a desired capacity with high concentric accuracy between the rotor blocks.

Embodiment 2. FIG.
4 is a front view showing a rotor block according to a second embodiment of the present invention, FIG. 5 is a longitudinal sectional view of the rotor according to the second embodiment, and FIG. It is a longitudinal cross-sectional view which shows the decomposition | disassembly state (before an assembly) of a rotor.

  The iron core block 20, permanent magnet 21, bolt 24, and rotor block 25 of the rotor 200 of the second embodiment are the same as those of the first embodiment, and the rotor 200 of the second embodiment is implemented. The difference from the rotor 100 of the embodiment 100 is that the rotating shaft 26 is not provided. Instead of the rotating shaft 26, a hollow shaft described later is attached to both overlapping surfaces (both shaft end surfaces).

  The rotor blocks 25, 25, 25 are not concentric with the plurality of rotor blocks 25, 25, 25 because the rotary recesses 28, 25, 25 are fitted to the circular concave portions 28 and the circular convex portions 27, so A highly accurate rotor of a permanent magnet type rotating electrical machine can be obtained. Further, since a solid rotating shaft is not used, a rotor having a small inertia force can be obtained. Further, by stacking a required number of single rotor blocks 25, a rotor having a desired capacity can be obtained.

Embodiment 3 FIG.
FIG. 7 is a longitudinal sectional view of the rotor according to the third embodiment. The iron core block 30 is formed by forming a magnetic material such as silicon steel into a disk shape. A center hole 30 a is formed at the center of the iron core block 30. Further, on both overlapping surfaces of the iron core block 30, circular concave portions 38, 38 are formed concentrically with the center hole 30a.

  In addition, the iron core block 30 is provided with screw holes 32 and 32 into which the bolts 34 are screwed at positions symmetrical with respect to the central axis Z, and the shaft of the bolt 34 is passed through a position rotated 90 ° from the position of the screw holes 32. Straight holes 33 are provided.

  Four permanent magnets 31 having an inner peripheral surface 31c having the same curvature as the outer peripheral surface 30c are affixed to the outer peripheral surface 30c of the iron core block 30 at the same circumferential position as the screw hole 32 and the straight hole 33 at equal intervals. . The axial length of the permanent magnet 31 is formed shorter than the axial length of the iron core block 30, and the permanent magnet 31 is fixed to the central portion of the iron core block 30 in the axial direction. The permanent magnet 31 is magnetized so that magnetic poles adjacent in the circumferential direction are different from each other. The iron core block 30 to which the permanent magnet 31 is fixed is called a rotor block 35.

  The iron core block 30x is a disk formed of a magnetic material. A center hole 30y is formed at the center of the iron core block 30x. Further, on both overlapping surfaces of the iron core block 30x, circular convex portions 37, 37 are formed concentrically with the center hole 30y.

  Further, the iron core block 30x is provided with straight holes 33x and 33x through which the shafts of the bolts 34 pass at positions symmetrical with respect to the central axis Z.

  Four permanent magnets 31 having an inner peripheral surface 31c having the same curvature as the outer peripheral surface 30z are fixed to the outer peripheral surface 30z of the iron core block 30x at equal intervals. The axial length of the permanent magnet 31 is shorter than the axial length of the iron core block 30x, and the permanent magnet 31 is fixed to the central portion of the iron core block 30x in the axial direction. The permanent magnet 31 is magnetized so that magnetic poles adjacent in the circumferential direction are different from each other. The iron core block 30x to which the permanent magnet piece 31 is fixed is referred to as a rotor block 35x.

  Next, a method for assembling the rotor 300 according to the third embodiment will be described. First, the circular convex portion 37 on the right side of the rotor block 35x shown in the middle of FIG. 3 is fitted into the circular concave portion 38 of the rotor block 35 shown on the right side of FIG.

  Next, the circular concave portion 38 of the rotor block 35 shown on the left side of FIG. 3 is fitted to the circular convex portion 37 on the left side of the rotor block 35x, and the straight holes 33, 33 of the left rotor block 35 and Bolts 34, 34 are passed through the straight holes 33x, 33x of the middle rotor block 35x and screwed into the screw holes 32, 32 of the right rotor block 35, and the rotor blocks 35, 35x, 35 are circumferentially positioned and fastened. To do.

  As shown in FIG. 7, a plurality of rotor blocks are divided into a rotor block 35 in which circular concave portions 38 and 38 are formed on both overlapping surfaces, and a rotation in which circular convex portions 37 and 37 are formed on both overlapping surfaces. Even if the child block 35x is combined, the rotor blocks 35, 35x, 35 do not require a plurality of rotation axes having different axial lengths due to the fitting of the circular concave portion 38 and the circular convex portion 37. A rotor 300 of a permanent magnet type rotating electric machine with high concentric accuracy of the rotor blocks 35, 35x, 35 is obtained. Further, since a solid rotating shaft is not used, a rotor having a small inertia force can be obtained.

Embodiment 4 FIG.
FIG. 8 is a longitudinal sectional view of the rotor according to the fourth embodiment. The iron core block 40 is a magnetic body formed in a disk shape. A center hole 40 a is formed at the center of the iron core block 40. Further, a conical concave portion 48 is formed concentrically with the center hole 40a on one overlapping surface of the iron core block 40, and a conical convex portion 47 is formed concentrically with the central hole 40a on the other overlapping surface. ing. The taper of the conical recessed part 48 and the taper of the conical convex part 47 are formed in the same taper.

  Further, the iron core block 40 is provided with screw holes 42 and 42 into which the bolts 44 are screwed at positions symmetrical with respect to the central axis Z, and the shaft of the bolt 44 is passed through a position rotated by 90 ° from the position of the screw holes 42. Straight holes 43, 43 are provided.

  Four permanent magnets 41 having an inner circumferential surface 41c having the same curvature as the outer circumferential surface 40c are affixed at equal intervals on the outer circumferential surface 40c of the iron core block 40 at the same circumferential position as the screw hole 42 and the straight hole 43. . The axial length of the permanent magnet 41 is shorter than the axial length of the iron core block 40, and the permanent magnet 41 is fixed to the central portion of the iron core block 40 in the axial direction. The permanent magnet 41 is magnetized so that magnetic poles adjacent in the circumferential direction are different from each other. The iron core block 40 to which the permanent magnet 41 is fixed is referred to as a rotor block 45.

  The difference between the rotor block 45 of the fourth embodiment and the rotor block 25 of the first embodiment is that the circular concave portion 28 and the circular convex portion 27 are a conical concave portion 48 and a conical convex portion 47. And there is no counterbore hole to accommodate the head of the bolt.

  Next, a method for assembling the rotor 400 of the fourth embodiment will be described. First, the conical convex portion 47 of the rotor block 45 shown in the middle of FIG. 8 is fitted into the conical concave portion 48 of the rotor block 45 shown on the right side of FIG.

  Next, the conical convex portion 47 of the rotor block 45 shown on the left side of FIG. 8 is fitted into the conical concave portion 48 of the middle rotor block 45, and the straight holes 43 of the left rotor block 45 are fitted. 43 and bolts 44 and 44 are passed through straight holes 43 and 43 of the rotor block 45 in the middle and screwed into the screw holes 42 and 42 of the right rotor block 45 to position the rotor blocks 45, 45 and 45 in the circumferential direction. Then conclude.

  According to the rotor 400 of the fourth embodiment, the concave portion 48 and the convex portion 47 to be fitted have a conical shape. Therefore, the machining tolerance between the concave portion 48 and the convex portion 47 is absorbed by the taper, and the rotor block 45 45, 45 can be assembled with high accuracy.

Embodiment 5. FIG.
9 is a front view showing a rotor block according to a fifth embodiment of the present invention, FIG. 10 is a longitudinal sectional view of the rotor according to the fifth embodiment, and FIG. It is a longitudinal cross-sectional view which shows the decomposition | disassembly state (before an assembly) of a rotor.

  The difference between the rotor block 55 of the fifth embodiment and the rotor block 25 of the first embodiment is that the two screw holes 22 and the two straight holes 23 are four identical as holes parallel to the central axis Z. The pin hole 52 and the absence of a counterbore hole for accommodating the head of the bolt.

  Next, a method for assembling the rotor 500 of the fifth embodiment will be described. First, the circular convex portion 57 of the rotor block 55 shown in the middle of FIG. 11 is fitted into the circular concave portion 58 of the rotor block 55 shown on the right side of FIG. Pins 54, 54 as connecting members are press-fitted into the two pin holes 52, 52, and the center rotor block 55 and the right rotor block 55 are circumferentially positioned as shown in FIG. Join.

  Next, the circular convex portion 57 of the rotor block 55 shown on the left side of FIG. 11 is fitted into the circular concave portion 58 of the middle rotor block 55, and the pin hole 52 of the left rotor block 55 is inserted. The pins 54 and 54 are press-fitted into the pin holes 52 and 52 at positions rotated by 90 ° from the position of 52, and as shown in FIG. 10, the middle rotor block 55 and the left rotor block 55 are circumferentially moved. Position and join. The length of the pin 54 is substantially the same as the axial length of the rotor block 55.

  According to the rotor 500 of the fifth embodiment, since the rotor block 55 is coupled by press-fitting the pin 54, there is no need to provide a screw hole, a straight hole, a counterbore hole or the like in the rotor block 55, and only the pin hole 52 is provided. Therefore, the processing of the rotor block is simplified.

Embodiment 6 FIG.
12 is a front view showing a sixth embodiment of the rotor block according to the present invention, FIG. 13 is a longitudinal sectional view of the rotor according to the sixth embodiment, and FIG. 14 is a part A of FIG. FIG. 15 is an enlarged view, and FIG. 15 is a diagram illustrating another example of the key according to the sixth embodiment.

  As shown in FIGS. 12 to 14, the rotor block 65 of the sixth embodiment is different from the rotor block 55 of the fifth embodiment in that it is parallel to the central axis Z instead of the four pin holes 52. Two wedge-shaped key grooves 62 as grooves are provided, and the rotor blocks 65, 65, 65 are circumferentially positioned and coupled by a wedge-shaped key 64 as a connecting member press-fitted into the wedge-shaped key groove 62. It is that. The length of the wedge-shaped key 64 is substantially the same as the axial length of the rotor block 65.

  As shown in FIG. 15, the rotor block 65 is provided with two rectangular key holes 62a instead of the wedge-shaped key grooves 62, and the rotor blocks 65, 65, 65 are press-fitted into the rectangular key holes 62a. You may couple | bond by the key 64a.

  According to the rotor 600 of the sixth embodiment, since the rotor block 65 is coupled by press-fitting the wedge key 64 or the rectangular key 64a, it is necessary to provide the rotor block 65 with a screw hole, a straight hole, a counterbore hole, or the like. However, since only the wedge-shaped key groove 62 or the rectangular key hole 52a has to be provided, the processing of the rotor block is simple.

  In the rotors of the first to sixth embodiments described above, the permanent magnet is fixed to the outer peripheral surface of the iron core block, but the permanent magnet may be embedded in the outer peripheral portion of the iron core block. When the rotor is an outer rotor, the permanent magnet is fixed to the inner peripheral surface of the center hole of the iron core block or embedded in the inner peripheral portion.

Embodiment 7 FIG.
FIG. 16: is a front view which shows the assembly method of Embodiment 7 of the rotor concerning this invention, FIG. 17: is a front view which shows the other assembly method of Embodiment 7. FIG. When the rotor blocks 25 are stacked and the circular convex portion 27 of the rotor block 25 is fitted into the circular concave portion 28 of the rotor block 25, as shown in FIG. When the magnetic thin plate 70 is wound (arranged) in the vicinity of the forming surface (or may be inserted into the magnetic pipe) and laminated, the adjacent rotor block 25, The repulsive force between the 25 permanent magnets 21 and 21 can be reduced, and fitting can be performed easily.

  In addition, as shown in FIG. 17, when the rotor blocks 25 are stacked and the circular convex portion 27 of the rotor block 25 is fitted to the circular concave portion 28 of the rotor block 25, the rotor blocks 25, 25 are In a state of being inserted into a cylindrical jig having magnetic irregularities with the same pitch as the circumferential arrangement pitch of the permanent magnets 21 (the jig is arranged in the vicinity of the permanent magnets 21), such as the stator 80 or the stator 80. When fitted, the circumferential positions of the rotor blocks 25, 25 can be aligned magnetically, and the repulsive force between the permanent magnets 21, 21 can be reduced, and the straight holes 23 and screw holes 22 can be reduced. Positioning can be performed easily.

  FIG. 18 is a longitudinal sectional view showing an embodiment of the permanent magnet type rotating electrical machine of the present invention. The hollow shafts 91 and 92 and the bearings 93 and 93 are attached to both ends of the rotor 200, 300, 400, 500 or 600 according to the second to sixth embodiments, and the rotor is inserted into the stator 90. By supporting the hollow shafts 91 and 92 by the brackets 94 and 95 at both ends of the stator 90 via the bearings 93 and 93, the permanent magnet type rotating electrical machine of the embodiment can be obtained.

  According to the permanent magnet type rotating electrical machine of the present embodiment, since the rotor blocks having high concentricity between the rotor blocks and high circumferential alignment accuracy between the permanent magnets are provided, the permanent magnet type rotating machine has small cogging torque and torque ripple. An electric machine is obtained. Further, since a hollow shaft is used, a permanent magnet type rotating electrical machine having a small inertia force can be obtained.

It is a front view which shows Embodiment 1 of the rotor block concerning this invention. FIG. 3 is a longitudinal sectional view of the rotor according to the first embodiment. FIG. 3 is a longitudinal sectional view showing an exploded state (before assembly) of the rotor according to the first embodiment. It is a front view which shows Embodiment 2 of the rotor block concerning this invention. FIG. 6 is a longitudinal sectional view of a rotor according to a second embodiment. FIG. 6 is a longitudinal sectional view showing a disassembled state (before assembly) of a rotor according to a second embodiment. FIG. 6 is a longitudinal sectional view of a rotor according to a third embodiment. FIG. 6 is a longitudinal sectional view of a rotor according to a fourth embodiment. It is a front view which shows Embodiment 5 of the rotor block concerning this invention. FIG. 10 is a longitudinal sectional view of a rotor according to a fifth embodiment. FIG. 10 is a longitudinal sectional view showing an exploded state (before assembly) of a rotor according to a fifth embodiment. It is a front view which shows Embodiment 6 of the rotor block concerning this invention. FIG. 10 is a longitudinal sectional view of a rotor according to a sixth embodiment. It is the A section enlarged view of FIG. FIG. 32 is a diagram illustrating another example of the key according to the sixth embodiment. It is a front view which shows the assembly method of Embodiment 7 of the rotor concerning this invention. FIG. 24 is a front view showing another assembling method of the seventh embodiment. 1 is a longitudinal sectional view showing an embodiment of a permanent magnet type rotating electrical machine according to the present invention.

Explanation of symbols

20, 30, 30x, 40, 50 Iron core block 20a, 30a, 30y, 40a, 50a Center hole 20c, 30c, 30z, 40c, 50c Outer peripheral surface 21, 31, 41, 51 Permanent magnet 21c, 31c, 41c, 51c Inside Peripheral surface 22, 32, 42 Screw hole 52 Pin hole 23, 33, 33x, 43 Straight hole 23a Counterbore 24, 34, 44 Bolt 24a Head 54 Pin 25, 35, 35x, 45, 55 Rotor block 26 Rotating shaft 27 , 37, 57 Circular convex portion 47 Conical convex portion 28, 38, 57 Circular concave portion 48 Conical concave portion 70 Thin plate 80 Stator 90 Stator 91, 92 Hollow shaft 100, 200, 300, 400, 500, 600 Rotor Z center Axis

Claims (13)

In a rotor of a permanent magnet rotating electrical machine formed by laminating a plurality of rotor blocks formed in a disc shape having a center hole and having a plurality of permanent magnets arranged on the outer peripheral portion or the inner peripheral portion,
The rotor block is a rotor of a permanent magnet type rotating electrical machine, wherein a concave portion or a convex portion for concentrically positioning adjacent rotor blocks is formed on the overlapping surface.   The rotation of the permanent magnet type rotating electrical machine according to claim 1, wherein the rotor block has the concave portion formed on one overlapping surface and the convex portion formed on the other overlapping surface. Child.   The plurality of rotor blocks include a rotor block in which the concave portion is formed on both overlapping surfaces and a rotor block in which the convex portion is formed on both overlapping surfaces. The rotor of the permanent magnet type rotating electrical machine according to claim 1.   The rotor of a permanent magnet type rotating electrical machine according to any one of claims 1 to 3, wherein the concave portion and the convex portion are formed in a circular shape concentric with the center hole.   The rotor of a permanent magnet type rotating electrical machine according to any one of claims 1 to 4, wherein the concave portion and the convex portion are formed in a conical shape.   The rotor block has a hole or groove parallel to the central axis, and by arranging a connecting member in the hole or groove, the stacked rotor blocks are positioned and connected in the circumferential direction. The rotor of a permanent magnet type rotating electrical machine according to any one of claims 1 to 5.   The rotor of a permanent magnet type rotating electrical machine according to claim 6, wherein the length of the connecting member is substantially equal to the axial length of the rotor block.   The rotation of the permanent magnet type rotating electric machine according to claim 6 or 7, wherein the connecting member is a bolt, and the rotor block is formed with a counterbore hole for receiving the head of the bolt. Child.   The rotor of a permanent magnet type rotating electric machine according to claim 6 or 7, wherein the connecting member is a pin.   The rotor of a permanent magnet type rotating electric machine according to claim 6 or 7, wherein the connecting member is a key.   A permanent magnet type rotating electric machine comprising the rotor of the permanent magnet type rotating electric machine according to claim 1. In the manufacturing method of the rotor of the permanent magnet type rotating electrical machine,
A method of manufacturing a rotor of a permanent magnet type rotating electrical machine, comprising the step of arranging and laminating a magnetic body in the vicinity of a magnetic pole forming surface of the rotor blocks when the rotor blocks are stacked. In the manufacturing method of the rotor of the permanent magnet type rotating electrical machine,
When laminating the rotor blocks, a step of arranging and laminating a jig having magnetic irregularities with the same pitch as the circumferential arrangement pitch of the permanent magnets in the vicinity of the permanent magnets of the rotor blocks is provided. A method of manufacturing a rotor of a permanent magnet type rotating electrical machine.

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