JP2010088270A - Rotating electrical machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electrical machine which enables a permanent magnet to be held steady for a long period in a simple magnet holding structure without excessively increasing the precision of processing the permanent magnet and a yoke portion. <P>SOLUTION: First and second magnet pedestal members 30 and 35 have first and second magnet fitting slots 31 and 36 with trapezoidal sections that are open upward, thus are formed into the pedestal members that has a given thickness in the direction of the slots 31 and 36 and that are trapezoidal in their sections. Sidewalls formed of sides of the trapezoidal sections of the first and second magnet pedestal members 30 and 35 and the first and second magnet fitting slots 31 and 36 have thin grooves with rectangular sections, thus formed into irregular surfaces. First and second permanent magnets 32 and 37 are fitted into the first and second magnet fitting slots 31 and 36, and are held by the first and second magnet pedestal members 30 and 35. The first and second magnet pedestal members 30 and 35 are held by a pole core with their both sides fitted into first and second magnet pedestal fitting slots on first and second yoke portions. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine such as a vehicular AC generator, and more particularly to a Landell type rotor structure equipped with a permanent magnet.

  Due to environmental problems in recent years, the load of electrical components mounted on the vehicle has increased rapidly, and further increase in the power generation amount of the Landel rotor has been demanded. If it is going to respond to this request in the conventional design range, the generator becomes large, and the weight and arrangement space of the generator increase, which is not preferable. In addition, it is known that an increase in the size of the generator causes an increase in rotor inertia, which causes a new problem in that vibrations and slippage of the belt occur due to interaction between engine speed fluctuations and generator inertia torque. It has been. For these reasons, there is a need to increase the capacity of the generator without increasing the size of the generator body, that is, to reduce the size of the generator and increase the output.

In view of such a situation, a first conventional AC generator in which a permanent magnet is disposed between claw-shaped magnetic pole portions adjacent to each other in the circumferential direction of a Landel rotor has been proposed (see, for example, Patent Document 1). ).
Further, there is provided a second conventional AC generator in which the permanent magnet is arranged on the peripheral mounting surface located between the magnetic pole fingers of the magnetic pole piece, the strap is arranged so as to cover the permanent magnet, and is fixed to the magnetic pole piece by the nail. It has been proposed (see, for example, Patent Document 2).

US Pat. No. 4,959,577 JP 2004-153994 A

The vehicular AC generator is driven by the rotational force of the engine transmitted through a belt and a pulley, and rotates at a maximum speed of about 18,000 to 20,000 rpm. Therefore, even if a small magnet of about several grams per pole is disposed, an extremely large centrifugal force exceeding several tens Kgf is applied to the magnet.
Further, a large centrifugal force acts on the claw-shaped magnetic pole portion even when the permanent magnet is not held, and the tip portion swells to the outer peripheral side by about 50 to 100 μm. As the engine speed increases or decreases, the claw-shaped magnetic pole portion is displaced to flutter. Since the claw-shaped magnetic pole part has a cantilever support structure, the displacement increases on the tip side and decreases on the root side, and the relative distance between the claw-shaped magnetic pole parts adjacent in the circumferential direction also changes.

Therefore, in the first conventional AC generator in which the permanent magnet is disposed between the claw-shaped magnetic pole parts adjacent in the circumferential direction, the displacement of the claw-shaped magnetic pole part due to the centrifugal force is added to the magnet holding structure in addition to the centrifugal force. There exists a subject that it acts and cannot hold a permanent magnet stably for a long term.
In the second conventional AC generator, since the permanent magnet is disposed between the magnetic pole fingers of the magnetic pole piece, the displacement of the magnetic pole finger due to centrifugal force does not act on the magnet holding structure. In addition, since the permanent magnet is fixed to the pole piece with a strap, initially, the permanent magnet, whose outer shape is difficult to machine with high precision, is strongly fixed to the pole piece, whose magnet holder is difficult to machine with high precision. Can be retained. However, since the strap that holds the permanent magnet is fixed to the magnetic pole piece by the nail, the stress due to the centrifugal force acting on the magnet holding structure concentrates on the fixing point between the strap and the magnetic pole piece by the nail, and the fixing portion is damaged. It becomes easy to generate | occur | produce and there exists a subject that a permanent magnet cannot be stably hold | maintained for a long term.

  The present invention has been made to solve such a problem, and a permanent magnet is held at a portion between the claw-shaped magnetic pole portions of the yoke portion via a magnet base member made of a magnetic material, and is centrifuged. The effect of displacement of the claw-shaped magnetic pole part due to force is eliminated, and the permanent magnet is held by fitting so that the centrifugal force acting on the permanent magnet is received by the fitting surface, and the processing accuracy of the permanent magnet and the yoke part is improved. It is an object of the present invention to obtain a rotating electrical machine that can stably hold a permanent magnet for a long time with a simple magnet holding structure without excessively increasing it.

  The rotating electrical machine according to the present invention includes a boss portion, a pair of yoke portions extending radially outward from both axial end edges of the boss portion, and an axial direction alternately from each of the pair of yoke portions. A pole core that has a plurality of claw-shaped magnetic pole portions that are extended and meshed with each other and arranged in the circumferential direction, fixed to a shaft that is inserted through the axial center of the boss portion, the boss portion, and the pair of yokes And a field coil housed in a space surrounded by the plurality of claw-shaped magnetic pole portions, and an outer periphery of the rotor is disposed so as to surround a predetermined air gap. And a stator. The rotating electrical machine is formed in a portion between the claw-shaped magnetic poles adjacent to each other in the circumferential direction of the yoke portion, and the magnet base fitting groove having the groove direction as an axial direction and the magnet base fitting groove from the axial direction. Magnetic material that is fitted, has a circumferential, radial, and axial movement restricted, is held by the yoke portion, opens on the top surface, and has a magnet fitting groove that has the groove direction as the axial direction And a magnet base member, and is fitted in the magnet fitting groove from the axial direction, and the movement in the circumferential direction, the radial direction, and the axial direction is restricted, and a predetermined inner surface on the tip side of the claw-shaped magnetic pole portion A permanent magnet held on the magnet base member so as to face each other with a gap, and a fitting surface of the magnet base member with the magnet base fitting groove, and the permanent magnet fitting groove. The fitting surface with the magnet is formed in an uneven surface.

According to the present invention, since the magnet pedestal member that holds the permanent magnet is held at the portion between the claw-shaped magnetic poles adjacent to each other in the circumferential direction of the yoke portion, the displacement of the claw-shaped magnetic pole portion due to the centrifugal force is The permanent magnet can be stably held for a long time without acting on the member.
Further, since the permanent magnet is fitted in the magnet fitting groove and held by the magnet pedestal member, the centrifugal force acting on the permanent magnet is received by the mating surface of the magnet fitting groove of the magnet pedestal member with the permanent magnet. be able to. Thereby, the occurrence of damage to the permanent magnet due to the concentration of stress due to centrifugal force is suppressed, and the permanent magnet can be stably held for a long time.

  Further, since the magnet pedestal member is a separate member from the pole core, the outer shape of the magnet pedestal member and the inner shape of the magnet fitting groove can be easily processed with high accuracy. Therefore, the permanent magnet can be fitted and held in the magnet fitting groove of the magnet base member without processing the outer shape of the permanent magnet with excessively high accuracy. Further, the magnet pedestal member can be fitted and held in the magnet pedestal fitting groove of the yoke part without excessively processing the groove shape of the magnet pedestal fitting groove formed in the yoke part.

  Furthermore, since the fitting surface of the magnet pedestal member with the magnet pedestal fitting groove is formed as an uneven surface, when the magnet pedestal member is moved in the axial direction, the fitting between the magnet pedestal member and the magnet pedestal fitting groove is performed. A large frictional force is generated at the joint, and the axial movement of the magnet base member is prevented. Similarly, since the fitting surface of the magnet fitting groove with the permanent magnet is formed in an uneven surface, the fitting portion between the permanent magnet and the magnet fitting groove is large when the permanent magnet moves in the axial direction. A frictional force is generated to prevent the permanent magnet from moving in the axial direction.

Embodiment 1 FIG.
1 is a longitudinal sectional view schematically showing an automotive alternator according to Embodiment 1 of the present invention. FIG. 2 shows a rotor applied to the automotive alternator according to Embodiment 1 of the present invention. FIG. 3 is a perspective view illustrating a method for mounting a permanent magnet on a magnet holder in an automotive alternator according to Embodiment 1 of the present invention, and FIG. 4 is directed to Embodiment 1 of the present invention. FIGS. 5 and 6 are diagrams for explaining a method of mounting a permanent magnet on a pole core in an automotive alternator, and FIGS. 5 and 6 are schematic diagrams for explaining the flow of magnetic flux in the automotive alternator according to Embodiment 1 of the present invention. FIG.

  1 to 4, an AC generator 1 for a vehicle is supported by a case 4 including a substantially bracket-shaped aluminum front bracket 2 and a rear bracket 3 and a shaft 16 on the case 4 via a bearing 5. The rotor 13 rotatably disposed in the case 4, the pulley 6 fixed to the end of the shaft 16 extending to the front side of the case 4, and the axial end surfaces of the rotor 13 A fixed fan 7 and a fixed air gap 29 with respect to the rotor 13, a stator 10 that surrounds the outer periphery of the rotor 13 and is fixed to the case 4, and is fixed to the rear side of the shaft 16. A pair of slip rings 8 for supplying current to the rotor 13 and a pair of brushes 9 disposed in the case 4 so as to slide on the slip rings 8 are provided. Although not shown, a rectifier that rectifies alternating current generated in the stator 10 into direct current, a voltage regulator that adjusts the magnitude of the alternating voltage generated in the stator 10, and the like are disposed in the case 4. .

  The stator 10 is wound around a cylindrical stator core 11 and the stator core 11, and an alternating current is generated by a change in magnetic flux from a field coil 14 (to be described later) as the rotor 13 rotates. And.

The rotor 13 includes a field coil 14 that generates a magnetic flux when an excitation current is passed, a pole core 15 that is provided so as to cover the field coil 14, and a magnetic pole is formed by the magnetic flux, and an axial center position of the pole core 15. And a shaft 16 penetrating into the shaft.
The pole core 15 is divided into first and second pole core bodies 17 and 21 made of a low carbon steel such as S10C by a cold forging method.

  The first pole core body 17 has a cylindrical outer peripheral surface, a first boss portion 18 formed with a shaft insertion hole 18a penetrating the axial center position, and radially outward from one end edge of the first boss portion 18. A thick ring-shaped first yoke portion 19 that is extended, and a first claw-shaped magnetic pole portion 20 that extends from the outer peripheral portion of the first yoke portion 19 to the other end side in the axial direction are provided. . The first claw-shaped magnetic pole portion 20 has a substantially trapezoidal outermost surface shape, the circumferential width gradually decreases toward the distal end side, and the radial thickness gradually decreases toward the distal end side. It is formed in a tapered shape, and eight, for example, are arranged on the outer peripheral portion of the first yoke portion 19 at an equiangular pitch in the circumferential direction. Further, the first trough portion 25 is recessed at a portion located between the adjacent first claw-shaped magnetic pole portions 20 of the first yoke portion 19 in, for example, a U-shape that is convexly curved toward the inner diameter side. ing.

  The second pole core body 21 has a cylindrical outer peripheral surface, a second boss portion 22 formed with a shaft insertion hole 22a passing through the axial center position, and a radially outer side from the other end edge of the second boss portion 22. A thick ring-shaped second yoke portion 23 extending from the outer periphery of the second yoke portion 23 and a second claw-shaped magnetic pole portion 24 extending to one end in the axial direction. . The second claw-shaped magnetic pole portion 24 has a substantially trapezoidal outermost surface shape, its circumferential width gradually decreases toward the distal end side, and its radial thickness gradually decreases toward the distal end side. For example, eight taper shapes are arranged on the outer peripheral portion of the second yoke portion 23 at an equiangular pitch in the circumferential direction. Further, the second valley portion 26 is recessed in a U-shape that is curved convexly toward the inner diameter side, for example, at a portion located between the adjacent first claw-shaped magnetic pole portions 24 of the second yoke portion 23. ing.

  The first and second pole core bodies 17 and 21 configured as described above mesh with the first and second claw-shaped magnetic pole portions 20 and 24 alternately, and the other end surface of the first boss portion 18 is connected to the second boss. It abuts on one end surface of the portion 22 and is fixed to the shaft 16 penetrating the shaft insertion holes 18a, 22a. A field coil 14 wound around a bobbin (not shown) includes first and second boss portions 18 and 22, first and second yoke portions 19 and 23, and first and second claw-shaped magnetic poles. It is mounted in a space surrounded by the parts 20 and 24. Here, the first and second boss portions 18 and 22 and the first and second yoke portions 19 and 23 correspond to the boss portion of the pole core 15 and the pair of yoke portions, respectively.

  The first magnet pedestal member 30 is an integrated body made of a magnetic material such as pure iron, and is made into a cross-sectional trapezoid having a predetermined thickness. And the 1st magnet fitting groove | channel 31 is opened in the upper surface, and is formed in the 1st magnet base member 30 by making a groove direction into the thickness direction. Here, the upper surface of the first magnet pedestal member 30 is a surface constituted by the bottom side (long side) of the trapezoidal cross section, and the upper and lower surfaces of the first magnet pedestal member 30 and the bottom surface of the first magnet fitting groove 31 are formed. It is a parallel plane. And the groove width of the 1st magnet fitting groove | channel 31 is formed in the wedge-shaped cross-sectional trapezoid which becomes narrow gradually toward opening. Further, the both side walls of the first magnet base member 30 and the both side walls of the first magnet fitting groove 31 are formed in a concave-convex surface by forming a large number of straight grooves with a rectangular cross section by cutting. Yes. The first permanent magnet 32 is formed into an outer shape conforming to the inner shape of the first magnet fitting groove 31, that is, a trapezoidal cross section having a predetermined thickness, and its upper and lower surfaces (outer peripheral surface and inner peripheral surface) are parallel planes. It has become.

  The first permanent magnet 32 is fitted into the first magnet fitting groove 31 from the thickness direction of the first magnet base member 30 as shown in FIG. 3 and FIG. Then, an adhesive is applied, magnetically connected, and held by the first magnet base member 30.

The second magnet pedestal member 35 is made in the same shape using the same material as the first magnet pedestal member 30. The both side walls of the second magnet pedestal member 35 and the both side walls of the second magnet fitting groove 36 are formed in a concavo-convex surface by a large number of straight grooves having a rectangular cross section formed by cutting. The second permanent magnet 37 is made in the same shape using the same material as the first permanent magnet 32. Then, the second permanent magnet 37 is fitted in the second magnet fitting groove 36, and an adhesive is applied as necessary, and is magnetically connected and held by the second magnet base member 35.
In order to obtain a sufficient magnetic saturation relaxation effect with a small-capacity magnet, anisotropic sintered rare earth magnets having an energy product BHmax of 30 MGOe or more should be used for the first and second permanent magnets 32 and 37. preferable.

  The first magnet pedestal fitting groove 27 is open to each of the opposing portions on the upper side of the inner wall surface of each first valley portion 25 on the base side of each first claw-shaped magnetic pole portion 20 of the first pole core body 17. Further, the first yoke part 19 is recessed so as to penetrate from the one end side to the other end side with the groove direction as the axial direction. Similarly, the second magnet pedestal fitting groove 28 is located on the base side of each second claw-shaped magnetic pole portion 24 of the second pole core body 21, and on each of the opposing portions on the upper side of the inner wall surface of each second valley portion 26. And is recessed so as to penetrate from the one end side to the other end side of the second yoke portion 23 with the groove direction as the axial direction. Here, the first and second magnet pedestal fitting grooves 27 and 28 are formed by the first and second magnet pedestal members 30 and 35 at the same time that the first and second pole core bodies 17 and 21 are produced by a cold forging method. It is formed in a groove shape to be fitted.

As shown in FIG. 4B, the first magnet pedestal member 30 is press-fitted into the first magnet pedestal fitting groove 27 facing the first permanent magnet 32 upward, for example, from the outside in the axial direction. The adhesive is applied as necessary, and is magnetically connected to the first pole core body 17 in a state of being laid on the first valley portions 25. At this time, the upper surface of the first permanent magnet 32 faces the inner peripheral surface of the tip end side of the second claw-shaped magnetic pole portion 24 with a predetermined gap.
Similarly, the second magnet base member 35 is press-fitted into the second magnet base fitting groove 28 facing from the outside in the axial direction, for example, with the second permanent magnet 37 facing upward, and an adhesive is applied as necessary. Then, it is magnetically connected in a state of being laid on each second valley portion 26 and attached to the second pole core body 21. At this time, the upper surface of the second permanent magnet 37 is opposed to the inner peripheral surface of the tip end side of the second claw-shaped magnetic pole portion 24 with a predetermined gap.

  Further, in the first and second permanent magnets 32 and 37, the magnetization direction 40 is opposite to the direction of the magnetic field 41 formed in the plane in which the field current flowing through the field coil 14 is orthogonal to the axis of the rotor 13. It is so magnetized. That is, as shown in FIG. 1, when the field coil 14 is energized and the magnetic field 41 is generated in the direction of the arrow, the first and second permanent magnets 32 and 37 are magnetized in the opposite direction to the magnetic field 41. Is done. Here, the magnetization directions 40 of the first and second permanent magnets 32 and 37 coincide with the radial direction, and the first and second claw-shaped magnetic pole portions 20, which are opposed to the extension lines of the magnetization direction 40, 24 toward the inner peripheral surface on the tip side. In the case of a design in which the direction of the magnetic field 41 generated by the field current flowing through the field coil 14 is reversed, the first and second permanent magnets 32 and 37 are also magnetized and oriented in opposite directions.

Next, the operation of the vehicular AC generator 1 configured as described above will be described.
First, a current is supplied from a battery (not shown) to the field coil 14 of the rotor 13 via the brush 9 and the slip ring 8, and a magnetic flux is generated. By this magnetic flux, the first claw-shaped magnetic pole part 20 of the first pole core body 17 is magnetized to the N pole, and the second claw-shaped magnetic pole part 24 of the second pole core body 21 is magnetized to the S pole.
On the other hand, the rotational torque of the engine is transmitted to the shaft 16 via a belt (not shown) and the pulley 6, and the rotor 13 is rotated. Therefore, a rotating magnetic field is applied to the stator coil 12 of the stator 10, and an electromotive force is generated in the stator coil 12. This AC electromotive force is rectified into a DC current by a rectifier, and the battery is charged or supplied to an electric load.

Next, the operation of the magnetic flux will be described with reference to FIGS.
First, when the field coil 14 is energized, a magnetic flux 43 is generated. This magnetic flux 43 enters the teeth portion of the stator core 11 from the first claw-shaped magnetic pole portion 20 through the air gap 29. Then, the magnetic flux 43 moves in the circumferential direction from the tooth portion of the stator core 11 through the core back portion, and passes through the air gap 29 from the tooth portion facing the adjacent second claw-shaped magnetic pole portion 24 to the second. The claw-shaped magnetic pole part 24 is entered. Next, the magnetic flux 43 that has entered the second claw-shaped magnetic pole portion 24 passes through the second yoke portion 23, the second boss portion 22, the first boss portion 18, and the first yoke portion 19, and thus the first claw-shaped magnetic pole portion. 20 is reached. Here, in the conventional Landell type rotor, the first and second pole core bodies are designed to be limited, so that magnetic saturation occurs due to the magnetic field generated by the field coil, and the magnetic flux generated in the rotor decreases.

  In the first embodiment, the first and second permanent magnets 32 and 37 are magnetized and oriented so as to be opposite to the direction of the magnetic field 41 generated by the field coil 14. Therefore, the direction of the magnetic field generated by the first and second permanent magnets 32 and 37 is opposite to the magnetic field 41 generated by the field coil 14. In order for the magnetic flux 44 generated from the first and second permanent magnets 32 and 37 to interlink with the stator core 11, it is necessary to reciprocate through the air gap 29 having a large magnetic resistance. The first and second permanent magnets 32 and 37 are disposed on the inner diameter side of the second and first claw-shaped magnetic pole portions 24 and 20, and the first and second claw-shaped magnetic pole portions 20 and 24 It arrange | positions so that it may circulate with a shorter magnetic path length with respect to the surrounding surface side. Therefore, most of the magnetic flux 44 forms a magnetic circuit closed inside the rotor 13 without detouring to the stator core 11.

  That is, the magnetic flux 44 generated from the first permanent magnet 32 enters the first magnet base member 30. Here, below the first magnet pedestal member 30, the first valley portion 25, that is, a large gap exists. Therefore, the magnetic flux 44 that has entered the first magnet pedestal member 30 flows in the first magnet pedestal member 30 to both sides in the circumferential direction and enters the first yoke portion 19, and the first boss portion 18 and the second boss portion 22. Then, it passes through the second yoke portion 23 and the second claw-shaped magnetic pole portion 24 and returns to the first permanent magnet 32. Further, the magnetic flux 44 generated from the second permanent magnet 37 enters the first claw-shaped magnetic pole part 20 through the air gap, passes through the first yoke part 19, the first boss part 18, and the second boss part 22, Enter the second yoke 23. The magnetic flux 44 entering the second yoke portion 23 flows upward on both sides of the second valley portion 26 of the second yoke portion 23, enters the second magnet pedestal member 35 from both ends of the second magnet pedestal member 35, Return to the second permanent magnet 37.

  Therefore, the magnetic flux 44 generated by the first and second permanent magnets 32 and 37 is opposite to the magnetic flux 43 generated by the field coil 14, and the magnetic flux constituting the first and second pole core bodies 17 and 21. The density can be greatly reduced and magnetic saturation can be eliminated. Thereby, the amount of magnetic flux linked to the stator 10 can be increased, and a large amount of power generation can be obtained. In particular, the amount of power generation in the low-speed idling region where magnetic saturation is remarkable can be greatly increased.

  Here, since the 1st and 2nd pole core bodies 17 and 21 are produced by the cold forging manufacturing method, a shape cannot be produced with sufficient accuracy. On the other hand, since the first and second permanent magnets 32 and 37 are also sintered magnets, the shape cannot be produced with high accuracy. Therefore, when the first and second permanent magnets 32 and 37 are directly fitted in the fitting grooves of the first and second pole core bodies 17 and 21, the dimensional error becomes large and the fitting cannot be performed or the attachment strength is increased. The problem of becoming smaller occurs. In order to solve this problem, it is necessary to increase the shape accuracy by complicated post-processing, resulting in an increase in cost.

  According to the first embodiment, the first and second magnet base members 30 and 35 are made of a magnetic material and are separate parts from the first and second pole core bodies 17 and 21. The groove shapes of the first and second magnet fitting grooves 31 and 36 can be produced with high accuracy. Therefore, a dimensional error in the fitting portion between the first and second magnet base members 30 and 35 and the first magnet base fitting groove 27 is reduced, and the first and second magnet base members 30 and 35 are connected to the first and second magnet base members 30 and 35. The second yoke parts 19 and 23 can be firmly attached. Similarly, the dimensional error at the fitting portion between the first and second permanent magnets 32 and 37 and the first and second magnet fitting grooves 31 and 36 is reduced, and the first and second permanent magnets 32 and 37 are moved. The first and second magnet base members 30 and 35 can be firmly attached. Furthermore, it is not necessary to process the first and second magnet base fitting grooves 27 and 28 and the first and second permanent magnets 32 and 37 with high accuracy, and the cost can be reduced correspondingly.

  Further, since the first and second magnet base fitting grooves 27 and 28 are formed in the first and second valley portions 25 and 26 with the groove direction as the axial direction, the first and second magnet base members 30 and 35 are formed. Can be held in the first and second pole core bodies 17 and 21 simply by inserting them into the first and second magnet base fitting grooves 27 and 28 from the axial direction. Since the first and second magnet fitting grooves 31 and 36 are formed in the first and second magnet base members 30 and 35 with the groove direction as the axial direction, the first and second permanent magnets 32 and 37 are axially arranged. Can be held by the first and second magnet base members 30 and 35 simply by inserting them into the first and second magnet fitting grooves 31 and 36. As described above, the first and second permanent magnets 32 and 37 can be held by the first and second pole core bodies 17 and 21 with a simple holding structure.

  Further, since the side wall of the first magnet fitting groove 31 is formed in an uneven surface, the side wall constituted by the hypotenuse of the trapezoidal cross section of the first permanent magnet 32 when the first permanent magnet 32 moves in the axial direction. And a large frictional force is generated between the side wall of the first magnet fitting groove 31A formed on the uneven surface. Therefore, the holding strength against the movement of the first permanent magnet 32 in the axial direction can be improved. Similarly, since the side wall of the first magnet pedestal member 30 is formed on the concavo-convex surface, the side wall and the concavo-convex surface of the first magnet pedestal fitting groove 27 are moved when the first magnet pedestal member 30 is moved in the axial direction. A large frictional force is generated between the side wall of the formed first magnet base member 30. Therefore, the holding strength with respect to the movement of the first magnet base member 30 in the axial direction can be improved.

  Furthermore, the outer shape of the first and second magnet base members 30 and 35 and the groove shape of the first and second magnet fitting grooves 31 and 36 can be produced with high accuracy. Therefore, a gap in the fitting portion between the upper and lower surfaces of the first and second magnet pedestal members 30 and 35 and the first and second magnet pedestal fitting grooves 27 and 28, and further, the first and second magnet fitting grooves 31. , 36 and the gap between the fitting portions of the first and second permanent magnets 32, 37 can be reduced. As a result, the magnetic resistance at these fitting portions is reduced, the amount of magnetic flux of the magnet is increased, and the magnet can be used effectively.

Further, since the first and second permanent magnets 32 and 37 are held by the first and second magnet pedestal members 30 and 35 held by the first and second yoke portions 19 and 23, the first permanent magnets 32 and 37 are caused by centrifugal force. The displacement of the first and second claw-shaped magnetic pole portions 20 and 24 does not act on the magnet holding structure. Therefore, the first and second permanent magnets 32 and 37 can be stably held for a long time.
In addition, since the first and second permanent magnets 32 and 37 are fitted in the first and second magnet fitting grooves 31 and 36 formed in the first and second magnet base members 30 and 35, Centrifugal force acting on the first and second permanent magnets 32 and 37 is received by the wedge-shaped inner wall surfaces of the first and second magnet fitting grooves 31 and 36. Thereby, it is possible to prevent the first and second permanent magnets 32 and 37 from being damaged due to the concentration of stress due to the centrifugal force acting on the first and second permanent magnets 32 and 37. Also in this respect, the first and second permanent magnets 32 and 37 can be stably held for a long time.

  In addition, since the first and second permanent magnets 32 and 37 are incorporated in the first and second magnet base members 30 and 35, the first and second permanent magnets 32 and 37 remain as a single unit. The assembly of the rotor 13 is improved without being assembled to the pole core bodies 17 and 21.

  Further, since the first and second magnet pedestal members 30 and 35 are installed on the first and second trough portions 25 and 26, the first and second magnet pedestal members 30 and 35 are used as the first and second magnet pedestal members 30 and 35. It is not necessary to fill the valleys 25 and 26, and the volume of the first and second magnet base members 30 and 35 can be reduced. Further, since the first and second permanent magnets 32 and 37 are held by the first and second magnet pedestal members 30 and 35 installed on the first and second valley portions 25 and 26, the first and second The second permanent magnets 32 and 37 can be made as small as necessary. Therefore, the centrifugal force acting on the first and second magnet pedestal members 30 and 35 and the first and second permanent magnets 32 and 37 is reduced during high-speed rotation. Thus, the first and second permanent magnets 32 and 37 can be stably held on the pole core 15 with a simple holding structure.

Further, since the first and second magnet pedestal members 30 and 35 connect the inner wall surfaces on the upper side of the first and second valley portions 25 and 26 in the circumferential direction, the occurrence of deformation of the pole core 15 can be suppressed. .
In addition, the first and second permanent magnets 32 and 37 are disposed so as to face the inner peripheral surfaces on the tip side of the first and second claw-shaped magnetic pole portions 20 and 24. The permanent magnets 32 and 37 are located radially inward with respect to the outermost peripheral surface of the rotor 13. Therefore, the stator slot harmonics remain on the outermost peripheral surface portions of the first and second claw-shaped magnetic pole portions 20 and 24, and do not act to directly heat the first and second permanent magnets 32 and 37. As a result, the first and second permanent magnets 32 and 37 are prevented from being heated and demagnetized.

  In addition, the first and second permanent magnets 32 and 37 are disposed so as to face the inner peripheral surfaces on the front end side of the first and second claw-shaped magnetic pole portions 20 and 24 with a predetermined gap. And the magnetic circuit of the 2nd permanent magnets 32 and 37 turns into a magnetic circuit closed inside a rotor, and the magnetic flux component linked to the stator 10 is lose | eliminated. Therefore, generation of the induced voltage of the first and second permanent magnets 32 and 37 during no-load no-excitation is suppressed. As a result, the amount of magnets of the first and second permanent magnets 32 and 37 can be increased.

In the first embodiment, the first and second magnet pedestal fitting grooves 27 and 28 have the groove direction parallel to the axial center, and the first and second yoke portions 19 and 23 have one end side to the other end side. However, the first and second magnet pedestal fitting grooves are not necessarily required to penetrate in the axial direction, and one ends of the first and second yoke portions 19 and 23 are provided. It may be open to the side or the other end.
In the first embodiment, the first and second permanent magnets 32 and 37 are formed in a trapezoidal cross section having a predetermined thickness, but the first and second permanent magnets 32 and 37 are the first and second permanent magnets 32 and 37. The cross-sectional shape is not particularly limited as long as it is held by the second magnet base member.

Embodiment 2. FIG.
FIG. 7 is a diagram for explaining a method of mounting a permanent magnet on a pole core in a vehicle AC generator according to Embodiment 2 of the present invention.

In FIG. 7, the magnetic plate 45 is formed into a trapezoidal flat plate shape, for example, by pressing an electromagnetic steel plate, and then cutting the pressed surface into a flat end surface substantially orthogonal to the main surface. It is formed to open at the bottom. The first magnet base member 30A is manufactured by laminating and integrating a large number of magnetic plates 45 by alternately shifting in a direction perpendicular to the laminating direction. As a result, the first magnet base member 30A is formed in a trapezoidal cross section having a predetermined thickness, and the fitting groove portions 46 are connected in the stacking direction to constitute the first magnet fitting groove 31A. By alternately shifting the magnetic plates 45, both side walls of the first magnet pedestal member 30A and both side walls of the first magnet fitting groove 31A are formed on the uneven surface. Moreover, since the 2nd magnet base member is comprised similarly to 30 A of 1st magnet base members, the description is abbreviate | omitted here.
Other configurations are the same as those in the first embodiment.

  In the second embodiment, as shown in FIG. 7A, the first permanent magnet 32 is press-fitted into the first magnet fitting groove 31A from the thickness direction of the first magnet base member 30A, and the first magnet It is held by the base member 30A. Then, as shown in FIG. 7B, the first magnet base member 30A is press-fitted into the first magnet base fitting groove 27 facing from the outside in the axial direction with the first permanent magnet 32 facing upward. The adhesive is applied as necessary, and is magnetically connected to the first pole core body 17 in a state of being laid on the first valley portions 25.

  Also in the second embodiment, since the side wall of the first magnet fitting groove 31A is formed to be an uneven surface, the first permanent magnet 32 has a trapezoidal cross section when the first permanent magnet 32 moves in the axial direction. A large frictional force is generated between the side wall constituted by the oblique side and the side wall of the first magnet fitting groove 31A formed on the uneven surface. Therefore, the holding strength against the movement of the first permanent magnet 32 in the axial direction can be improved. Similarly, since the side wall of the first magnet pedestal member 30A is formed in a concavo-convex surface, the side wall and the concavo-convex surface of the first magnet pedestal fitting groove 27 when the first magnet pedestal member 30A is moved in the axial direction. A large frictional force is generated between the first magnet base member 30A and the side wall of the first magnet base member 30A. Therefore, the holding strength against the movement of the first magnet base member 30A in the axial direction can be improved.

  In the second embodiment, the first magnet base member 30A is configured by laminating magnetic plates 45. Therefore, the uneven surface is formed by simply shifting the peripheral surface of the magnetic plate 45 constituting the side wall of the first magnet base member 30A fitted to the side wall of the first magnet base fitting groove 27 in the direction orthogonal to the stacking direction. . Similarly, an uneven surface is formed only by shifting the peripheral surface of the magnetic plate 45 constituting the side wall of the first magnet fitting groove 31A fitted to the side wall of the first permanent magnet 32 in a direction orthogonal to the stacking direction. This eliminates the need for complicated groove processing for forming an uneven surface, thereby reducing the cost.

  In the second embodiment, the uneven surface is formed by alternately shifting the magnetic plates 45 made in the same shape in the direction orthogonal to the stacking direction. However, the outer shape of the magnetic plate and the magnet fitting groove It is also possible to produce two types of magnetic plates whose inner shapes are different from each other by the level difference of the concavo-convex shape, and to form the concavo-convex surface by alternately stacking two types of magnetic plates.

Embodiment 3 FIG.
FIG. 8 is a view for explaining a method of mounting the permanent magnet on the pole core in the automotive alternator according to Embodiment 3 of the present invention.

In FIG. 8, the first magnet pedestal member 30 </ b> B, like the first magnet pedestal member 30, is an integral body of a lump made of a magnetic material such as pure iron, and is formed into a cross-sectional trapezoid having a predetermined thickness. The magnet fitting groove 31B is opened on the upper surface, and is formed in the first magnet base member 30B with the groove direction as the thickness direction. The first magnet pedestal member 30B is manufactured by press molding, and the burrs 47 by press molding are stamped out from the edges of both side walls of the first magnet pedestal member 30B and the edges of both side walls of the first magnet fitting groove 31B. Projected in the direction. Moreover, since the 2nd magnet base member is comprised similarly to the 1st magnet base member 30B, the description is abbreviate | omitted here.
Other configurations are the same as those in the first embodiment.

  In the third embodiment, as shown in FIG. 8A, the first permanent magnet 32 is press-fitted into the first magnet fitting groove 31B from the thickness direction of the first magnet base member 30B, and the first magnet It is held by the base member 30B. Then, as shown in FIG. 8B, the first magnet pedestal member 30B is press-fitted into the first magnet pedestal fitting groove 27 facing from the outside in the axial direction with the first permanent magnet 32 facing upward. The adhesive is applied as necessary, and is magnetically connected to the first pole core body 17 in a state of being laid on the first valley portions 25.

In the third embodiment, since the burr 47 protrudes from the side wall edge of the first magnet fitting groove 31B in the thickness direction, the spring back force of the burr 47 is applied to the first permanent magnet 32, and the fitting force is increased. growing. Therefore, the holding strength against the movement of the first permanent magnet 32 in the axial direction can be improved. Similarly, since the burr 47 protrudes in the thickness direction from the edge of the side wall of the first magnet base member 30B, the spring back force of the burr 47 is applied to the side wall of the first magnet base fitting groove 27 and the fitting force is increased. growing. Accordingly, it is possible to improve the holding strength against the movement of the first magnet base member 30B in the axial direction.
Further, since the first permanent magnet 32 and the first magnet base member 30B are prevented from moving in the axial direction by using the burr 47 formed by press molding, post-processing such as deburring becomes unnecessary, and accordingly. Cost reduction is achieved.

Embodiment 4 FIG.
FIG. 9 is a view for explaining a method of mounting a permanent magnet on a pole core in a vehicle AC generator according to Embodiment 4 of the present invention.

In FIG. 9, the magnetic plate 48 is formed, for example, by press-molding an electromagnetic steel plate into a trapezoidal flat plate shape, and is formed so that the fitting groove 49 is open at the bottom of the trapezoid. The first magnet base member 30C is produced by stacking and integrating a large number of magnetic plates 48 with the punching direction of the press aligned. Thereby, the first magnet base member 30C is manufactured in a trapezoidal cross section having a predetermined thickness, and the fitting groove 49 is connected in the stacking direction to constitute the first magnet fitting groove 31C. Further, the both side walls of the first magnet base member 30C and the both side walls of the first magnet fitting groove 31C are formed with concavo-convex surfaces with burrs 50 formed by press molding in the lamination direction. Moreover, since the 2nd magnet base member is comprised similarly to 30 C of 1st magnet base members, the description is abbreviate | omitted here.
Other configurations are the same as those in the first embodiment.

  In the fourth embodiment, as shown in FIG. 9A, the first permanent magnet 32 is press-fitted into the first magnet fitting groove 31C from the thickness direction of the first magnet base member 30C, and the first magnet It is held by the base member 30C. Then, as shown in FIG. 9B, the first magnet base member 30C is press-fitted into the first magnet base fitting groove 27 facing from the outside in the axial direction with the first permanent magnet 32 facing upward. The adhesive is applied as necessary, and is magnetically connected to the first pole core body 17 in a state of being laid on the first valley portions 25.

  In the fourth embodiment, since the side wall of the first magnet fitting groove 31C is formed as an uneven surface, the cross section of the first permanent magnet 32 is trapezoidal when the first permanent magnet 32 moves in the axial direction. A large frictional force is generated between the side wall constituted by the oblique side and the side wall of the first magnet fitting groove 31C formed on the uneven surface. Therefore, the holding strength against the movement of the first permanent magnet 32 in the axial direction can be improved. Similarly, since the side wall of the first magnet pedestal member 30C is formed in a concavo-convex surface, the side wall and the concavo-convex surface of the first magnet pedestal fitting groove 27 when the first magnet pedestal member 30C is moved in the axial direction. A large frictional force is generated between the first magnet base member 30C and the side wall of the first magnet base member 30C. Therefore, the holding strength against the movement of the first magnet base member 30C in the axial direction can be improved.

Further, the side wall of the first magnet fitting groove 31C is constituted by a burr 50 that is continuous in the stacking direction. Therefore, when the first permanent magnet 32 tries to move in the axial direction, the rough surface of the first permanent magnet 32 is caught by the burr 50. Further, the spring back force of the burr 50 is applied to the first permanent magnet 32, and the fitting force is increased. Therefore, the movement of the first permanent magnet 32 in the axial direction is prevented.
Similarly, the side wall of the first magnet base member 30 </ b> C is configured by a burr 50 that is continuous in the stacking direction. Therefore, when the first magnet base member 30 </ b> C tries to move in the axial direction, the burr 50 is caught on the rough surface of the side wall of the first magnet base fitting groove 27. Further, the spring back force of the burr 50 is applied to the side wall of the first magnet base fitting groove 27, and the fitting force is increased. Accordingly, the movement of the first magnet base member 30C in the axial direction is prevented.

  Further, since the first permanent magnet 32 and the first magnet base member 30C are prevented from moving in the axial direction by using the burr 50 formed by press molding, post-processing such as deburring becomes unnecessary, and accordingly. Cost reduction is achieved.

Embodiment 5 FIG.
FIG. 10 is a view for explaining a method of mounting a permanent magnet on a pole core in an automotive alternator according to Embodiment 5 of the present invention.

In FIG. 10, the first magnet pedestal member 30D, like the first magnet pedestal member 30, is an integral body of a lump made of a magnetic material such as pure iron, and is made into a cross-sectional trapezoid having a predetermined thickness. The magnet fitting groove 31D is opened on the upper surface, and is formed in the first magnet base member 30D with the groove direction as the thickness direction. The both side walls of the first magnet pedestal member 30 and the both side walls of the first magnet fitting groove 31 have a plurality of linear cross-sectional wedge-shaped narrow grooves formed in parallel by cutting, and are formed of protrusions 51 having a cross-sectional wedge shape. Formed on the surface. Moreover, since the 2nd magnet base member is comprised similarly to 1st magnet base member 30D, the description is abbreviate | omitted here.
Other configurations are the same as those in the first embodiment.

  In the fifth embodiment, as shown in FIG. 10 (a), the first permanent magnet 32 is press-fitted into the first magnet fitting groove 31D from the thickness direction of the first magnet base member 30D, and the first magnet It is held by the base member 30D. Then, as shown in FIG. 10B, the first magnet pedestal member 30D is press-fitted into the first magnet pedestal fitting groove 27 facing from the outside in the axial direction with the first permanent magnet 32 facing upward. The adhesive is applied as necessary, and is magnetically connected to the first pole core body 17 in a state of being laid on the first valley portions 25.

  In the fifth embodiment, since the side wall of the first magnet fitting groove 31D is formed as an uneven surface, the first permanent magnet 32 has a trapezoidal cross section when moved in the axial direction. A large frictional force is generated between the side wall constituted by the oblique side and the side wall of the first magnet fitting groove 31D formed on the uneven surface. Therefore, the holding strength against the movement of the first permanent magnet 32 in the axial direction can be improved. Similarly, since the side wall of the first magnet pedestal member 30D is formed in a concavo-convex surface, the side wall and the concavo-convex surface of the first magnet pedestal fitting groove 27 when the first magnet pedestal member 30D is moved in the axial direction. A large frictional force is generated between the first magnet base member 30D and the side wall of the first magnet base member 30D. Therefore, it is possible to improve the holding strength against the movement of the first magnet base member 30D in the axial direction.

Further, the side wall of the first magnet fitting groove 31D is constituted by a projection 51 having a wedge-shaped cross section. Therefore, when the first permanent magnet 32 tries to move in the axial direction, the rough surface of the first permanent magnet 32 is caught by the protrusion 51, and the movement of the first permanent magnet 32 in the axial direction is prevented.
Similarly, the side wall of the first magnet base member 30 </ b> D is constituted by a protrusion 51 having a wedge-shaped cross section. Therefore, when the first magnet pedestal member 30D tries to move in the axial direction, the protrusion 51 is caught by the rough surface of the side wall of the first magnet pedestal fitting groove 27, and the movement of the first magnet pedestal member 30D in the axial direction is prevented. Is done.

Embodiment 6 FIG.
FIG. 11 is a diagram illustrating a method of mounting a permanent magnet on a pole core in a vehicle AC generator according to Embodiment 6 of the present invention.

In FIG. 11, the magnetic plate 52 is formed into a trapezoidal flat plate shape, for example, by pressing a magnetic steel sheet and then cutting the press surface into an inclined surface that obliquely intersects the main surface, and the fitting groove 53 is trapezoidal. It is formed so that it may open to the bottom side. The first magnet base member 30E is manufactured by laminating and integrating a large number of magnetic plates 52. Thereby, the 1st magnet base member 30E is produced by the cross-sectional trapezoid which has predetermined thickness, and the fitting groove part 53 continues in the lamination direction, and comprises the 1st magnet fitting groove 31E. The both side walls of the first magnet base member 30E and the both side walls of the first magnet fitting groove 31E are formed on an uneven surface composed of a projection 54 having a wedge-shaped cross section. Moreover, since the 2nd magnet base member is comprised similarly to the 1st magnet base member 30E, the description is abbreviate | omitted here.
Other configurations are the same as those in the first embodiment.

  In the sixth embodiment, as shown in FIG. 11A, the first permanent magnet 32 is press-fitted into the first magnet fitting groove 31E from the thickness direction of the first magnet base member 30E, and the first magnet It is held by the base member 30E. Then, as shown in FIG. 11B, the first magnet pedestal member 30E is press-fitted into the first magnet pedestal fitting groove 27 facing from the outside in the axial direction with the first permanent magnet 32 facing upward. The adhesive is applied as necessary, and is magnetically connected to the first pole core body 17 in a state of being laid on the first valley portions 25.

  Also in the sixth embodiment, since the side wall of the first magnet fitting groove 31E is formed as an uneven surface, when the first permanent magnet 32 moves in the axial direction, the first permanent magnet 32 has a trapezoidal cross section. A large frictional force is generated between the side wall constituted by the oblique side and the side wall of the first magnet fitting groove 31E formed on the uneven surface. Therefore, the holding strength against the movement of the first permanent magnet 32 in the axial direction can be improved. Similarly, since the side wall of the first magnet pedestal member 30E is formed in a concavo-convex surface, the side wall and the concavo-convex surface of the first magnet pedestal fitting groove 27 when the first magnet pedestal member 30E is moved in the axial direction. A large frictional force is generated between the first magnet base member 30E and the side wall of the first magnet base member 30E. Therefore, the holding strength against the movement of the first magnet base member 30E in the axial direction can be improved.

Further, the side wall of the first magnet fitting groove 31E is constituted by a projection 54 having a wedge-shaped cross section. Therefore, when the first permanent magnet 32 tries to move in the axial direction, the rough surface of the first permanent magnet 32 is caught by the protrusion 54, and the movement of the first permanent magnet 32 in the axial direction is prevented.
Similarly, the side wall of the first magnet base member 30E is constituted by a protrusion 54 having a wedge-shaped cross section. Therefore, when the first magnet pedestal member 30E tries to move in the axial direction, the projection 54 is caught by the rough surface of the side wall of the first magnet pedestal fitting groove 27, and the first magnet pedestal member 30E is prevented from moving in the axial direction. Is done.

In each of the above embodiments, the permanent magnet is disposed at the portion of the yoke portion facing the tip side inner peripheral surface of all the claw-shaped magnetic pole portions, but the permanent magnet is not necessarily all the claw-shaped magnetic pole portions. It is not necessary to arrange in the part of the yoke part facing the tip side inner peripheral surface of the part, for example, the yoke part facing the tip side inner peripheral surface of every other claw-shaped magnetic pole part in the circumferential direction, for example You may arrange | position in this site | part. At this time, the magnet base member may not be provided in the yoke portion where the permanent magnet is not provided, but a magnet base member that does not hold the permanent magnet may be provided.
Moreover, in each said embodiment, although the trough part shall be provided in the yoke part, the trough part does not necessarily need to be provided. In this case, the pedestal member fitting groove may be formed at a portion facing the tip side inner peripheral surface of the claw-shaped magnetic pole portion of the yoke portion, and the magnet pedestal member may be fitted into the pedestal member fitting groove.

In each of the above embodiments, the magnet base member and the permanent magnet are assumed to have a trapezoidal cross-sectional shape orthogonal to the rotor axis, but the cross-sectional shape is not limited to a trapezoid, For example, it may be a square or a rectangle.
In each of the above embodiments, the vehicle alternator has been described. However, the present invention is not limited to the vehicle alternator, and is applied to rotating electric machines such as a vehicle motor and a vehicle generator motor. Produces the same effect.

It is a longitudinal cross-sectional view which shows typically the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. It is a perspective view which shows the rotor applied to the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. It is a perspective view explaining the mounting method to the magnet holder of the permanent magnet in the alternating current generator for vehicles concerning Embodiment 1 of this invention. It is a figure explaining the mounting method to the pole core of the permanent magnet in the vehicle alternator which concerns on Embodiment 1 of this invention. It is a schematic diagram for demonstrating the flow of the magnetic flux in the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. It is a schematic diagram for demonstrating the flow of the magnetic flux in the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. It is a figure explaining the mounting method to the pole core of the permanent magnet in the alternating current generator for vehicles concerning Embodiment 2 of this invention. It is a figure explaining the mounting method to the pole core of the permanent magnet in the vehicle alternator which concerns on Embodiment 3 of this invention. It is a figure explaining the mounting method to the pole core of the permanent magnet in the vehicle alternator which concerns on Embodiment 4 of this invention. It is a figure explaining the mounting method to the pole core of the permanent magnet in the vehicle alternator which concerns on Embodiment 5 of this invention. It is a figure explaining the mounting method to the pole core of the permanent magnet in the vehicle alternator which concerns on Embodiment 6 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Stator, 13 Rotor, 14 Field coil, 15 Pole core, 16 Shaft, 17 1st pole core body, 18 1st boss | hub part, 19 1st yoke part, 20 1st claw-shaped magnetic pole part, 21 2nd pole core Body, 22 second boss part, 23 second yoke part, 24 second claw-shaped magnetic pole part, 29 air gap, 30, 30A, 30B, 30C, 30D, 30E first magnet pedestal member, 31, 31A, 31B, 31C, 31D, 31E First fitting groove, 32 First permanent magnet, 35 Second magnet base member, 36 Second fitting groove, 37 Second permanent magnet, 40 Magnetization direction, 47, 50 Burr, 48, 52 Magnetic plate, 51, 54 Protrusions.

Claims (9)

A boss portion, a pair of yoke portions extending radially outward from both end edges in the axial direction of the boss portion, and a pair of yoke portions alternately extending in the axial direction from each of the yoke portions, meshing with each other. A pole core that has a plurality of claw-shaped magnetic pole portions arranged in a direction and is fixed to a shaft that is inserted through an axial center of the boss portion; the boss portion; the pair of yoke portions; and the plurality of claws A rotor having a field coil housed in a space surrounded by a magnetic pole portion,
In a rotating electrical machine comprising: a stator disposed so as to surround an outer periphery of the rotor via a predetermined air gap;
A magnet base fitting groove formed in a portion between the claw-shaped magnetic poles adjacent to each other in the circumferential direction of the yoke portion, and having a groove direction as an axial direction;
It is fitted in the magnet base fitting groove from the axial direction, and the movement in the circumferential direction, the radial direction, and the axial direction is restricted and held by the yoke part, opens on the upper surface, and the groove direction is the axial direction. A magnet base member made of a magnetic material in which a magnet fitting groove is formed;
It is fitted in the magnet fitting groove from the axial direction, and the movement in the circumferential direction, radial direction, and axial direction is restricted so as to face the inner peripheral surface on the tip side of the claw-shaped magnetic pole part with a predetermined gap. A permanent magnet held on the magnet base member,
A rotating electric machine characterized in that a fitting surface of the magnet base member with the magnet base fitting groove and a fitting surface of the magnet fitting groove with the permanent magnet are formed in an uneven surface.   2. The rotating electrical machine according to claim 1, wherein the magnet base member is formed by laminating and integrating a plurality of magnetic plates.   The engagement surface of the magnet pedestal member with the magnet pedestal fitting groove and the uneven surface of the fitting surface of the magnet fitting groove with the permanent magnet are the multiple magnetic plates constituting the fitting surface. The rotating electrical machine according to claim 2, wherein the peripheral surface is alternately shifted in a direction orthogonal to the stacking direction.   The engagement surface of the magnet pedestal member with the magnet pedestal fitting groove and the uneven surface of the fitting surface of the magnet fitting groove with the permanent magnet are the multiple magnetic plates constituting the fitting surface. The rotating electrical machine according to claim 2, wherein each of the peripheral surfaces of the rotating electrical machine is formed in a wedge shape. Each of the plurality of magnetic plates is produced by press molding,
The engagement surface of the magnet pedestal member with the magnet pedestal fitting groove and the uneven surface of the fitting surface of the magnet fitting groove with the permanent magnet are the multiple magnetic plates constituting the fitting surface. 3. The rotating electrical machine according to claim 2, wherein burrs formed on the peripheral surface of the rotating electric machine are connected in the stacking direction. The magnet pedestal member is an integral body of a massive body,
The concave and convex surfaces of the fitting surface of the magnet base member with the magnet base fitting groove and the fitting surface of the magnet fitting groove with the permanent magnet are formed by forming a plurality of protrusions on the fitting surface. The rotating electric machine according to claim 1, wherein the rotating electric machine is provided.   The rotating electrical machine according to claim 6, wherein each of the plurality of protrusions is formed in a wedge shape. A boss portion, a pair of yoke portions extending radially outward from both end edges in the axial direction of the boss portion, and a pair of yoke portions alternately extending in the axial direction from each of the yoke portions, meshing with each other. A pole core fixed to a shaft having a plurality of claw-shaped magnetic pole portions arranged in a direction and inserted through an axial center position of the boss portion; the boss portion; the pair of yoke portions; and the plurality of claws A rotor having a field coil housed in a space surrounded by a magnetic pole portion,
In a rotating electrical machine comprising: a stator disposed so as to surround an outer periphery of the rotor via a predetermined air gap;
A magnet base fitting groove formed in a portion between the claw-shaped magnetic poles adjacent to each other in the circumferential direction of the yoke portion, and having a groove direction as an axial direction;
The magnet base is fitted in the magnet base fitting groove from the axial direction, the movement in the circumferential direction, the radial direction, and the axial direction is restricted, held by the yoke portion, opened on the upper surface, and the groove direction is the axial direction. A magnet base member made of a magnetic material in which a magnet fitting groove is formed;
It is fitted in the magnet fitting groove from the axial direction, and the movement in the circumferential direction, the radial direction, and the axial direction is restricted so as to face the inner circumferential surface on the tip side of the claw-shaped magnetic pole part with a predetermined gap. A permanent magnet held on the magnet base member,
The magnet pedestal member is an integral body of a press-molded mass, and a burr formed by press molding is a fitting surface of the magnet pedestal member with the magnet pedestal fitting groove, and the permanent magnet of the magnet fitting groove. A rotating electrical machine characterized by being formed on a fitting surface.   The rotating electrical machine according to any one of claims 1 to 8, wherein the permanent magnet is magnetized and oriented in a direction opposite to a magnetic field formed by the field coil.

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