JP6309065B1 - Rotating electric machine rotor and rotating electric machine using the same - Google Patents

Abstract

A rotor of a rotating electrical machine capable of improving the characteristics of a rotating electrical machine by efficiently using a magnetic flux of a permanent magnet by suppressing magnetic flux leakage into a rotor core and a rotating electrical machine using the same. A core sheet provided with a plurality of permanent magnets arranged in a V shape that opens in the outer diameter direction and forming magnetic poles in pairs, and a V-shaped opening portion that accommodates the plurality of permanent magnets. The core sheet 11A is provided at the inner diameter side end of the V-shaped opening 11b and the outer diameter side end of the V-shaped opening 11b. An inner diameter side air gap 11d1 and an outer diameter side air gap 11d2 are formed, projecting into the outer diameter side air gap 11d2, abutting on the permanent magnet 12, and the circumferential end face 11eb and the outer diameter side end face 11ec not contacting the permanent magnet are on the outer diameter side. The positioning projection 11e faces the gap 11d2. [Selection] Figure 4

Description

  The present invention relates to a rotor of a rotating electric machine in which a permanent magnet is embedded in a rotor core and a rotating electric machine using the same.

Among permanent magnet motors, a permanent magnet motor in which permanent magnets for forming field poles are embedded in a rotor core is referred to as an IPM (Interior Permanent Magnet) motor. In the IPM motor, it is important to prevent the magnetic flux of the permanent magnet from leaking to the rotor core and to efficiently use the magnetic flux of the permanent magnet for the interaction with the magnetic flux of the stator.
Conventionally, a first core steel plate having a magnet positioning portion for positioning a permanent magnet is disposed at both ends in the axial direction, and a second core steel plate having no magnet positioning portion is disposed at the central portion in the axial direction. There is a rotor of a rotating electrical machine that suppresses magnetic flux leakage from a magnet positioning portion while realizing positioning of a permanent magnet (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-46949 (FIG. 5)

  However, the rotor of the rotating electrical machine of Patent Document 1 has a problem that magnetic flux leakage from the magnet positioning portions at both axial end portions still occurs.

  The present invention has been made to solve the above-described problems, and is a rotating electrical machine that can improve the characteristics of a rotating electrical machine by efficiently using the magnetic flux of a permanent magnet by suppressing magnetic flux leakage into the rotor core. A rotor and a rotating electrical machine using the rotor are obtained.

The rotor of the rotating electrical machine according to the present invention is arranged in a V-shape that opens in the outer diameter direction, and includes a plurality of permanent magnets that form magnetic poles in pairs, and a core sheet that includes openings that accommodate the plurality of permanent magnets A rotor core having a rotor core formed by laminating a plurality of rotors in the direction of the rotation axis, the inner diameter side gap and the outer diameter side gap at the inner diameter side end of the opening and the outer diameter side end of the opening There are formed respectively, in contact with the permanent magnet to protrude the outer diameter side gap comprises a core sheet having a positioning protrusion surface not in contact with the permanent magnet facing the outer side gap, the rotor core is inserted in the permanent magnet The core sheet at the rear of the direction is provided with a positioning invitation portion in which the radial width of the positioning protrusion becomes smaller .

  According to the rotor of the rotating electrical machine of the present invention, magnetic flux leakage into the rotor core via the positioning projection can be suppressed. For this reason, the magnetic flux of a permanent magnet can be utilized efficiently and the characteristic of a rotary electric machine can be improved.

1 is an overall cross-sectional view showing a rotary electric machine according to Embodiment 1 of the present invention. It is a block diagram which shows the control unit of the rotary electric machine which concerns on Embodiment 1 of this invention. It is sectional drawing perpendicular | vertical to the axial direction of the rotary electric machine which concerns on Embodiment 1 of this invention. It is an expanded sectional view of the A section in FIG. FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 4, illustrating a lamination example of core sheets according to Embodiment 1 of the present invention. It is a partial expanded sectional view perpendicular | vertical to the axial direction of the core sheet which concerns on Embodiment 2 of this invention. It is a partial expanded sectional view perpendicular | vertical to the axial direction of the core sheet which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is an overall cross-sectional view illustrating the rotating electrical machine according to Embodiment 1, and FIG. 2 is a configuration diagram illustrating a control unit of the rotating electrical machine. The IPM motor 100, i.e., the rotating electrical machine, includes the rotor 10, a motor case 81 that passes through the rotor 10 and is rotatably supported by the output shaft 61 that is rotated by the rotor 10, and the bearing 84. And a stator 51 that is fixed to the inner surface of the motor case 81, faces the outer periphery of the rotor 10 via the air gap G, and surrounds the rotor 10. The output shaft 61 protrudes from one side of the motor case 81 and outputs the torque of the IPM motor 100 to the outside. The other side of the motor case 81 is provided with a frame 83 that rotatably supports the output shaft 61 via a bearing 84 and has holes formed at both ends. The frame 83 is covered with a bracket 82 having a terminal connector 85 to which a cable 86 is connected.
A plurality of windings 52 are wound around the stator 51 at intervals. In the present embodiment, the winding 52 has six windings corresponding to each set of each phase wound in two sets of three phases, but is not limited to this. The winding ends 52a and 52b in which the corresponding pairs are different from each other are the ends of the three windings corresponding to the respective phases, and penetrate through the holes formed in the frame 83 from the annular connection ring 53. Each extends to the bracket 82 side and is connected to each terminal connector 85.

The control unit 90 receives an electric power supplied from the power source 94 and a measurement signal from the sensor unit 95 and sends it to the CPU 92, and a CPU 92 that calculates a control amount based on the signal from the input circuit unit 91. And an output circuit unit 93 that outputs an output current corresponding to a control amount calculated by the CPU 92 to a harness (not shown) connected to the control unit 90. This harness (not shown) is connected to the cable 86, and the output current from the output circuit section 93 is supplied to the winding 52 via the cable 86 and the terminal connector 85. At this time, the currents flowing through the windings having different phases have a phase difference of 120 electrical degrees, and the currents flowing through the windings having different pairs have a phase difference of 30 electrical angles, for example. The control of the IPM motor 100 by the control unit 90 is, for example, angular velocity control or torque control, and is not particularly limited. The sensor unit 95 may be configured according to the type of control amount calculated by the CPU 92, such as an angular velocity meter or an angular accelerometer.

Next, the rotor 10 and the stator 51 will be described in more detail. 3 is a cross-sectional view perpendicular to the axial direction of the IPM motor 100, and FIG. 4 is an enlarged cross-sectional view of a portion A in FIG. In FIG. 3, the motor case 81 is omitted.
In the stator 51, a stator core 51a formed by laminating a plurality of thin plates is provided with 48 slots 51b at equal intervals in the circumferential direction, and four windings 52 are provided in each slot 51b. Has been inserted. Further, a tooth 51c is provided between adjacent slots. Each of the teeth 51c is connected to the teeth 51c adjacent to each other at the tip, and is formed so that the distance from the rotation center of the rotor 10 to the inner peripheral surface of the stator 51 is constant. In addition, the range which connects the front-end | tip part of the adjacent teeth 51c may be all the teeth 51c, for example, may be limited to some teeth 51c, such as only half. Although the number of slots provided in the stator iron core 51a is 48 here, the number of slots is not limited to this.

  The rotor 10 includes a rotor core 11 configured by laminating a plurality of core sheets 11A having a thickness t in the axial direction, and a plurality of permanent magnets 12 having a rectangular cross section and embedded in the rotor core 11. Yes. The core sheet 11A has a plurality of V-shaped openings 11b arranged along the circumferential direction in which a permanent magnet 12 is inserted into a flat plate portion 11a made of a ferromagnetic material such as iron, cobalt, or nickel. The character opening 11b has a V shape that opens in the outer diameter direction. Between the V-shaped openings 11b adjacent to each other, the outer periphery of the core sheet 11A is concave in the radial direction, and a bridge portion 11f having a shorter diameter than the periphery is formed. In the present embodiment, eight V-shaped openings 11b are provided, but the present invention is not limited to this.

A rectangular magnet housing portion 11c that is the same as the permanent magnet 12 is formed at the center of the V-shaped opposite side of the V-shaped opening 11b. An inner diameter side gap 11d1 as an inner diameter side flux barrier is formed at the inner diameter side end of the V-shaped opposite side. In addition, the circumferential direction width | variety of the internal diameter side space | gap 11d1 is narrower than the circumferential direction width | variety of the magnet accommodating part 11c. An outer diameter side gap 11d2 as an outer diameter side flux barrier is formed at the outer diameter side end of the V-shaped opposite side, and the outer diameter side gap 11d2 projects so as to cover the short side of the magnet housing portion 11c. A positioning projection 11e is provided. When the permanent magnet 12 is inserted into the magnet housing part 11 c, the positioning protrusion 11 e is positioned on the permanent magnet 12 with the inner diameter side end face 11 ea coming into contact with the permanent magnet 12. Further, the circumferential end surface 11eb and the outer diameter side end surface 11ec do not contact the permanent magnet 12 but face the outer diameter side gap 11d2. The radial width of the positioning protrusion 11e is Wt. Note that the radial distance Ws between the outer diameter side end surface 11ec and the inner peripheral surface of the V-shaped opening 11b shown in FIG. 4 is set so that the following expression is established in comparison with the plate thickness t of the core sheet 11A. .
Ws ≧ t

  The permanent magnets 12 inserted into the magnet housing portion 11c are arranged so that the magnetic poles of the two faces facing each other are in the same polarity pair, and one pair constitutes one pole. As shown in FIG. 3, when the magnetic pole of the permanent magnet 12 inserted into a certain V-shaped opening 11b is an N pole, the magnetic pole inserted into the adjacent V-shaped opening 11b is an S pole. A pair of magnetic poles adjacent to each other are arranged in opposite directions. In this embodiment, a pair of permanent magnets 12 is accommodated in one V-shaped opening 11b, but two openings arranged in a V-shape that open in the outer diameter direction are formed, and this 2 The permanent magnets 12 may be accommodated one by one in one opening.

  Next, the operation will be described. When a magnetic flux flows in the teeth 51c due to the output current from the control unit 90 flowing through the winding 52, the magnetic flux and the magnetic flux of the permanent magnet 12 interact with each other so that the magnetic pole of the permanent magnet 12 and the teeth 51c are attracted or repelled. Then, the rotor 10 rotates. At this time, if the magnetic flux of the permanent magnet 12 leaks into the rotor core 11 through the positioning projection 11e, the leaked magnetic flux flows directly from the N pole to the S pole through the rotor core 11, so that the magnetic flux of the teeth 51c The interacting magnetic flux is reduced, and the rotational speed and torque of the rotor 10 are reduced. Further, since the flat plate portion 11a of the core sheet 11A constituting the rotor core 11 is a ferromagnetic body, the magnetic flux of the permanent magnet 12 tends to flow into the rotor core 11 from the contact point between the permanent magnet 12 and the flat plate portion 11a. The positioning protrusion 11e of the present embodiment positions the permanent magnet 12 by bringing the inner diameter side end face 11ea into contact with the permanent magnet 12, while the circumferential end face 11eb and the outer diameter side end face that do not contact the permanent magnet 12 11ec faces the outer diameter side gap 11d2. As a result, the contact area between the permanent magnet 12 and the positioning protrusion 11e is reduced, and magnetic flux leakage through the positioning protrusion 11e is suppressed.

Further, as described above, the radial distance Ws between the outer diameter side end surface 11ec and the inner peripheral surface of the V-shaped opening 11b is equal to or greater than the plate thickness t of the core sheet 11A, and thus the radial width Wt of the positioning projection 11e. Is kept small, and the circumferential cross-sectional area of the positioning projection 11e is small. As a result, the magnetic resistance of the positioning protrusion 11e with respect to the magnetic flux flowing in the circumferential direction is increased, and the magnetic flux flowing into the rotor core 11 via the positioning protrusion 11e is further suppressed.

  Further, between the adjacent V-shaped openings 11b, the outer peripheral portion of the core sheet 11A has a small circumferential cross-sectional area and a large magnetic resistance due to the bridge portion 11f. As a result, the flow of magnetic flux passing through the outer periphery of the core sheet 11A is suppressed between the V-shaped openings 11b adjacent to each other.

  The fixing of the permanent magnet 12 is not particularly limited, such as using an adhesive or a fixing jig. However, a fastening allowance may be provided on the positioning projection 11e and press-fitted and fixed. Due to the press-fitting and fixing of the permanent magnet 12, a stress in the surface direction is applied to the positioning projection 11e, causing magnetic deterioration of the positioning projection 11e. For this reason, the magnetic flux which flows in into the rotor core 11 via the positioning protrusion part 11e can further be suppressed.

Here, the lamination of the core sheet 11A will be described. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4 and is a diagram illustrating an example of stacking of core sheets 11A. In FIG. 5, the left side is the inner diameter side of the rotor 10, and the right side is the outer diameter side of the rotor 10.
In configuring the rotor core 11, all may be configured by the core sheet 11A. However, as illustrated in FIG. 5A, a part or all of the rotor core 11 may be divided into two sheets with respect to one core sheet 11A. It is good also as the positioning protrusion intermittent lamination | stacking part 111 which combined the core sheet | seat 11B without a positioning protrusion. By providing the positioning protrusion intermittently laminated portion 111, the positioning protrusion 11e can be greatly magnetically deteriorated when the permanent magnet 12 is press-fitted and fixed as described above. Here, two core sheets 11B without positioning protrusions are combined with one core sheet 11A, but the present invention is not limited to this, and there is no one or more positioning protrusions with respect to one core sheet 11A. What is necessary is just to combine the core sheet 11B .

  Further, as shown in FIG. 5B, a part or all of the rotor core 11 may be constituted by a positioning invitation portion 112. Here, it is assumed that the permanent magnet 12 is inserted downward from above, and in the positioning invitation 112, the core sheets 11A1 to 11A4 and the core sheet 11B without positioning protrusions are stacked from above, and the core sheets 11A1 to 11A4 are positioned to be positioning protrusions. The radial width Wt of 11e is continuously reduced. By providing the positioning invitation 112, the permanent magnet 12 can be easily assembled.

  According to the first embodiment, when the permanent magnet is inserted into the magnet housing portion, only the inner diameter side end surface of the positioning protrusion is brought into contact with the permanent magnet to position the permanent magnet, and the circumferential end surface and the outer diameter side The contact area between the permanent magnet and the positioning projection is reduced by making the end face face the outer diameter side gap without contacting the permanent magnet. For this reason, leakage of magnetic flux through the positioning protrusion is suppressed, and more permanent magnets interact with the stator magnetic flux, so that the permanent magnet magnetic flux can be used efficiently and the characteristics of the rotating electrical machine can be improved. .

  In addition, since a bridge portion having a shorter diameter than the surrounding is provided between the adjacent V-shaped openings to suppress the flow of magnetic flux between the adjacent V-shaped openings, the bridge is accommodated in a certain V-shaped opening. The flow of magnetic flux from the permanent magnet constituting the N pole to the permanent magnet constituting the S pole accommodated in the adjacent V-shaped opening was suppressed. For this reason, the magnetic flux of the permanent magnet which flows in the rotor core can be suppressed, and the magnetic flux of the permanent magnet can be utilized more efficiently.

  In addition, the radial distance between the outer diameter side end face of the positioning protrusion and the inner peripheral face of the V-shaped opening is set to be equal to or greater than the plate thickness of the core sheet, and the radial width and the circumferential sectional area of the positioning protrusion are kept small. By increasing the resistance, the magnetic flux flowing into the rotor core via the positioning projection is suppressed, so that the magnetic flux of the permanent magnet can be used more efficiently.

  Further, when the permanent magnet is press-fitted and fixed, the magnetic flux flowing into the rotor core through the positioning protrusion can be further suppressed due to the deterioration of the magnetic characteristics of the positioning protrusion due to the surface stress accompanying the press-fitting.

  Further, in the stator, teeth adjacent to each other are connected at the tip, and since the distance from the rotation center of the rotor to the inner peripheral surface of the stator is constant, variation in the radial width of the air gap is suppressed, Cogging torque is reduced.

Embodiment 2. FIG.
The second embodiment of the present invention will be described below with reference to FIG. The same or corresponding parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted. The second embodiment is different from the first embodiment in the core sheet.

  FIG. 6 is a partial cross-sectional view perpendicular to the axial direction of the core sheet according to the second embodiment. The core sheet 21A is provided with a plurality of V-shaped openings 21b along the circumferential direction in which the permanent magnets 12 are inserted into the flat plate portion 11a, and the V-shaped openings 21b open in the outer diameter direction. It has a letter shape. Between the V-shaped openings 21b adjacent to each other, the outer periphery of the core sheet 21A is concave in the radial direction, and a bridge portion 11f having a shorter diameter than the periphery is formed.

  A rectangular magnet housing portion 11c that is the same as the permanent magnet 12 is formed at the center of the V-shaped opposite side of the V-shaped opening 21b. An inner diameter side gap 11d1 as an inner diameter side flux barrier is formed at the inner diameter side end of the V-shaped opposite side. In addition, the circumferential direction width | variety of the internal diameter side space | gap 11d1 is narrower than the circumferential direction width | variety of the magnet accommodating part 11c. An outer diameter side air gap 21d2 as an outer diameter side flux barrier is formed at the outer diameter side end of the V-shaped opposite side, and the outer diameter side air gap 21d2 covers a part of the short side of the magnet housing portion 11c. A positioning projection 21e is provided so as to project. When the permanent magnet 12 is inserted into the magnet housing portion 11 c, the positioning projection 21 e is positioned on the permanent magnet 12 with the inner diameter side end face 21 ea contacting the permanent magnet 12. Further, the circumferential end surface 21eb does not contact the permanent magnet 12 and faces the outer diameter side gap 21d2. The permanent magnet 12 inserted into the V-shaped opening 21b constitutes one pole as one pair, and the pair of adjacent magnetic poles are opposite to each other as in the first embodiment.

Between the V-shaped opening 21b of the outer diameter side gap 21d2 adjacent to each other it is provided with a hole portion 21g. Hole 21g is separated from the outer diameter side gap 21d2 by position-decided Me protrusion 21e.

  Next, the operation will be described. The positioning projection 21e of the present embodiment positions the permanent magnet 12 by bringing the inner diameter side end face 21ea into contact with the permanent magnet 12, while the circumferential end face 21eb not contacting the permanent magnet 12 has an outer diameter side gap. It faces 21d2. As a result, the contact area between the permanent magnet 12 and the positioning projection 21e is reduced, and leakage of magnetic flux through the positioning projection 21e is suppressed when the magnetic flux flowing through the teeth 51c and the magnetic flux of the permanent magnet 12 interact.

  Further, depending on the hole portion 21g, similarly to the bridge portion 11f, the circumferential cross-sectional area between the V-shaped opening portions adjacent to each other is reduced and the magnetic resistance is increased, so that the V-shaped opening portions 21b adjacent to each other. In the meantime, the flow of magnetic flux passing through the outer periphery of the core sheet 21A is suppressed.

  Since the fixing of the permanent magnet 12 and the lamination of the core sheet 21A are the same as in the first embodiment, the description thereof is omitted.

  According to the second embodiment, the same effect as in the first embodiment can be obtained.

  Further, since the hole is separated from the outer diameter side gap by the positioning projection, the core sheet has high mechanical rigidity and can be applied to an IPM motor that rotates at high speed.

Embodiment 3 FIG.
The third embodiment of the present invention will be described below with reference to FIG. The same or corresponding parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted. The third embodiment is different from the first embodiment in the positioning protrusion.

  FIG. 7 is a partial cross-sectional view perpendicular to the axial direction of the core sheet according to the third embodiment. In the core sheet 31A, a plurality of V-shaped openings 31b into which the permanent magnets 12 are inserted into the flat plate portion 11a are arranged along the circumferential direction, and the V-shaped openings 31b open in the outer diameter direction. It has a letter shape. Between the mutually adjacent V-shaped openings 31b, the outer periphery of the core sheet 21A is concave in the radial direction, and a bridge portion 11f having a shorter diameter than the periphery is formed.

  A rectangular magnet housing portion 11c that is the same as the permanent magnet 12 is formed at the center of the V-shaped opposite side of the V-shaped opening 31b. An inner diameter side gap 11d1 as an inner diameter side flux barrier is formed at the inner diameter side end of the V-shaped opposite side. In addition, the circumferential direction width | variety of the internal diameter side space | gap 11d1 is narrower than the circumferential direction width | variety of the magnet accommodating part 11c. An outer diameter side gap 31d2 as an outer diameter side flux barrier is formed at the outer diameter side end of the V-shaped opposite side, and the outer diameter side gap 31d2 projects so as to cover the short side of the magnet housing portion 11c. A positioning projection 31e is provided. When the permanent magnet 12 is inserted into the magnet housing portion 11c, the positioning protrusion 11e is positioned on the permanent magnet 12 with the inner diameter side end surface 31ea abutting against the permanent magnet 12. Further, the circumferential end face 31eb and the outer diameter side end face 31ec do not contact the permanent magnet 12 but face the outer diameter side gap 31d2. The permanent magnet 12 inserted into the V-shaped opening 31b constitutes one pole as one pair, and the pair of adjacent magnetic poles are opposite to each other as in the first embodiment.

  The positioning protrusion 31e can be elastically deformed toward the outer diameter side of the core sheet 31A as shown by a broken line in FIG. When the permanent magnet 12 is accommodated in the magnet accommodating portion 11c, the permanent magnet 12 is held by the elastic force of the positioning projection 31e.

  Since the operation and the lamination of the core sheet 31A are the same as those in the first embodiment, the description thereof is omitted.

  According to the third embodiment, the same effect as in the first embodiment can be obtained.

In addition, since the positioning projection can be elastically deformed in the outer diameter direction, the permanent magnet can be held in the rotor core using the elastic force. For this reason, an adhesive or a fixing member for fixing the permanent magnet becomes unnecessary, and the permanent magnet can be fixed easily.
Further, since the fixing force applied to the permanent magnet can be reduced as compared with the press-fitting and fixing, damage to the permanent magnet and deterioration of the magnetic characteristics can be reduced.

  In the first to third embodiments, the IPM motor that converts electric energy into kinetic energy by rotation of the rotor and outputs the kinetic energy to the outside via the output shaft has been described. However, the present invention is based on kinetic energy from the outside. The present invention can also be applied to a generator that rotates a rotor and converts kinetic energy generated by the rotation into electric energy.

  Further, within the scope of the present invention, the present invention can be freely combined with each other, and each embodiment can be appropriately modified or omitted.

10 rotor, 11 rotor core, 11A, 11A1 to 11A4, 21A, 31A core sheet, 11B core sheet without positioning protrusion, 111 positioning protrusion intermittent lamination part, 112 positioning guide part, 11b, 21b, 31b V-shaped opening part, 11d1 inner diameter side Air gap, 11d2, 21d2, 31d2 Outer diameter side gap, 11e, 21e, 31e Positioning protrusion, 11ea, 21ea, 31ea Inner diameter side end face, 11eb, 21eb, 31eb, Circumferential end face, 11ec, 31ec Outer diameter side end face, 11f Bridge Part, 21g hole part, 12 permanent magnet, 51 stator, 51c teeth, 61 output shaft, 81 motor case, 100 IPM motor, G air gap

Claims (9)

A plurality of permanent magnets that are arranged in a V shape that opens in the outer diameter direction and that form a pair of magnetic poles, and a core sheet that includes an opening that accommodates the plurality of permanent magnets is laminated in the direction of the rotation axis A rotor of a rotating electric machine having a rotor core that is
An inner diameter side gap and an outer diameter side gap are formed at an inner diameter side end of the opening and an outer diameter side end of the opening, respectively, protrude into the outer diameter side gap and abut against the permanent magnet, and the permanent magnet Comprising a core sheet having a positioning projection facing the outer diameter side gap, the surface not contacting the
The rotor core includes a positioning guide portion in which a radial width of the positioning projection portion decreases toward a core sheet at the rear of the permanent magnet in the insertion direction .   The rotor for a rotating electrical machine according to claim 1, wherein an outer peripheral surface is recessed between the openings adjacent to each other.   The rotor of the rotating electrical machine according to claim 1, wherein a hole is formed between the openings adjacent to each other.   The rotor of the rotating electrical machine according to any one of claims 1 to 3, wherein the positioning protrusion is elastically deformable radially outward. In each said core sheet, the radial direction distance of the outer peripheral side end surface of the said positioning protrusion part and the internal peripheral surface of the said opening part is more than the plate | board thickness of the said core sheet, The 1st to 4 characterized by the above-mentioned. The rotor of the rotary electric machine of any one of these.   The rotor of the rotating electrical machine according to any one of claims 1 to 5, wherein the permanent magnet is press-fitted and fixed to the opening.   The said rotor core is provided with the positioning protrusion intermittent lamination | stacking part on which the core sheet | seat which does not have the said positioning projection part was laminated | stacked with respect to the one core sheet which has the said positioning projection part. The rotor of the rotary electric machine of any one of 1 to 6. A rotor of a rotating electrical machine according to any one of claims 1 to 7 ,
A rotating shaft passing through the center of the rotating electrical machine;
A case for rotatably supporting the rotating shaft via a bearing and storing a rotor of the rotating electrical machine;
A rotating electric machine comprising: a stator fixed to an inner wall of the case and surrounding the rotor of the rotating electric machine via an air gap. The rotating electrical machine according to claim 8 , wherein the stator is connected to tip portions of adjacent teeth.

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