JP2007221953A - Rotary electric machine, and method for manufacturing rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make miniaturization compatible with high efficiency by improving a space factor of a coil in a rotary electric machine. <P>SOLUTION: The rotary electric machine is composed so as to use an object as a stator 18 in which an insulating coating film is applied on its surface and a magnetic material is filled around an annularly molded coil 18b so as to form unevenness in a radiation direction. A plurality of protruding parts 20 are radially formed at a position facing both axial ends of the stator 18 in a rotor 12. Therefore, it is possible to significantly improve the space factor of the coil to a coil mounting part in the magnetic material since a gap is almost not formed between the coil 18b and the filled magnetic material in the stator 18. Consequently, it is possible to achieve the rotary electric machine in which miniaturization is made compatible with high efficiency. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine such as a motor or a generator and a method for manufacturing the same.

  As an example in which a rotating electrical machine is mounted, an automobile will be described as an example. In recent years, automobiles tend to widen the interior of a vehicle without increasing the size of the vehicle itself. Therefore, each component must be mounted in a narrow space, and there is a demand for downsizing. However, as a rotating electrical machine, the size must be reduced while maintaining or improving efficiency. Such demands for both miniaturization and high efficiency are not limited to automobiles, but also apply to other products.

  Heretofore, in order to achieve both reduction in size and high efficiency of the rotating electrical machine, it has been considered to increase the space factor of the coil wound around the stator. According to Patent Document 1, a coil having a rectangular cross section is wound around a stator of an alternator serving as a rotating electric machine, and a gap between the coils or between a slot of the stator around which the coil is wound and the coil are wound. The gap is made as small as possible to improve the space factor of the coil in the slot. For this reason, if it is an alternating current generator of the same magnitude | size, it is possible to improve electric power generation efficiency compared with what wound the coil with a circular cross section.

JP-A-11-155270

  However, in the AC generator described in Patent Document 1, although a higher space factor can be achieved, there is a limit to the improvement of the space factor. This is because it is extremely difficult to form a coil having a completely rectangular cross-sectional shape. Even if the cross-sectional shape of the coil can be made to be a complete rectangular shape, a gap will not be created as long as the coil is inserted into the slot. For this reason, there was a problem that a higher space factor could not be expected.

  An object of the present invention is to provide a rotating electrical machine that improves the space factor of a coil more than ever and achieves both miniaturization and high efficiency.

  The rotating electrical machine of the present invention has a coil formed in an annular shape so as to form a plurality of communicating portions that communicate between the inner peripheral side and the outer peripheral side, and is filled with a magnetic material around the coil. The first member is disposed in the annular gap formed in the circumferential direction with the first member configured as a member of the first member, and different magnetic poles are generated on the respective surfaces facing both axial ends of the first member, and Each of the magnetic poles has a second member configured to be formed in a plurality in the circumferential direction.

  In addition, the first coil disposed inside the first member is formed in an annular shape so that irregularities are formed in the radial direction, and on each surface of the second member facing both ends in the axial direction of the first member, A plurality of convex portions are provided radially, and a second coil is provided on the first member.

  The rotating electrical machine is a generator, and has a coil formed in an annular shape so as to form a plurality of communication portions that communicate between the inner peripheral side and the outer peripheral side, and a magnetic material is provided around the coil. It is characterized by having a stator filled with an annular member and a rotor formed with a plurality of magnetic paths passing through the stator in the axial direction.

  The rotating electrical machine is a generator, and a plurality of permanent magnets extending in the radial direction and a magnetic material are alternately provided in the circumferential direction on each surface of the rotor that faces both axial ends of the stator. It is characterized by that.

  In addition, the first member has a plurality of phase coils, and the periphery of the coil is filled with a magnetic material for each phase to form a plurality of first member components, and each first member component is electrically angled. It is characterized by being manufactured by being superimposed and integrated in a state shifted by a predetermined angle.

  Since the first member or the stator in the present invention is configured by filling a magnetic material around the coil, an extremely high space factor can be realized.

[First embodiment]
A first example of an automotive alternator mounted on an automobile as one embodiment of the rotating electrical machine of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view of an axial side surface of a vehicle alternator.

  The vehicle alternator 1 of the present embodiment has a front bracket 2 arranged on the left side in FIG. 1 and a rear bracket 3 arranged on the left side in FIG. 1, and each bracket is accommodated inside. It has a bottomed cylindrical shape having a space, that is, a bowl shape. These brackets have a large number of holes of various shapes through which air flows. Further, the front bracket 2 and the rear bracket 3 are integrally provided with fixing portions 2b and 3b that are open to the bolt holes 2a and 3a so as to protrude radially outward, and these fixing portions 2a and 3a are provided integrally. It is attached to the vehicle by a bolt (not shown).

  A rear cover 4 that is thinner than the bracket is attached to the end of the rear bracket 3 in the axial direction. Like the bracket, the rear cover 4 has a bottomed cylindrical shape having a housing space inside, that is, a bowl shape. . A terminal 5 connected to the battery is attached to the outer end of the rear cover 4 in the axial direction.

  Ball bearings 6F and 6R serving as bearings are respectively attached to the substantially central positions in the radial direction at the axially outer ends of the front bracket 2 and the rear bracket 3, but the ball bearings 6F attached to the front bracket 2 are A ball bearing having a larger outer diameter than the ball bearing 6R attached to the rear bracket 3 is used.

  A shaft 7 is inserted into the inner rings of these ball bearings 6F and 6R, and the shaft 7 is rotatably supported with respect to the front bracket 2 and the rear bracket 3.

  A pulley 8 as a rotation transmission member is fixed to the end of the shaft 7 on the side of the front bracket 2 so as to rotate integrally with a bolt 9. The rotation of the engine (not shown) is transmitted to the pulley 8. The rotation is transmitted from the crank pulley by a belt as an endless transmission band. For this reason, the shaft 7 rotates in proportion to the engine speed and the pulley ratio of the pulley 8 and the crank pulley.

  Further, two slip rings 10 are attached to the end of the shaft 7 on the rear bracket 3 side so as to rotate integrally with the shaft 7, and two brushes that slide while being pressed against the respective slip rings 10. 11 is supplied with electric power.

  A front-side rotor member 12F and a rear-side rotor member 12R formed of a magnetic material are serration-coupled to each other so as to rotate integrally with the shaft 7 at a substantially central portion in the rotation axis direction of the shaft 7, The front-side rotor member 12F and the rear-side rotor member 12R are formed in an annular groove 13 in which the outer ends of the respective rotor members are formed in the shaft 7 so that the movement in the axial direction is restricted in a state where they are in contact with each other in the axial direction. Plastic flow. The front side rotor member 12F and the rear side rotor member 12R fixed to the shaft 7 in this way constitute the second member and the rotor 12 as a rotor.

  A front fan 14F and a rear fan 14R are provided at both ends of the rotor 12 in the rotational axis direction, respectively, and the air outside the front bracket 2 and the rear bracket 3 is axially rotated by rotating together with the rotor 12. It is made to flow in from the hole opened to the both ends, and it is made to flow out from the hole opened to radial direction outer side. For this reason, the bracket built-in object such as the rotor 12 is cooled.

  The front-side rotor member 12F and the rear-side rotor member 12R include a small-diameter shaft portion 12a and a large-diameter magnetic pole portion 12b, and the axial ends of the shaft portions 12a of both rotor members face each other and come into contact with each other. An annular gap 15 is formed at a substantially intermediate position in the rotation axis direction of the rotor 12. A field coil 16 as a second coil is wound around the rotation axis at the bottom of the annular gap 15, and both ends of the field coil 16 extend along the shaft 7. Connected to each. Therefore, the direct current supplied from the brush 11 through the slip ring 10 flows through the field coil 16, and the rotor 12 is magnetized accordingly, and a magnetic path is formed in the rotor 12 so as to go around the field coil 16. Is done. The current supplied to the field coil 16 is controlled according to the state of the vehicle battery, but an IC regulator (not shown) for adjusting the generated voltage is arranged inside the rear cover 4 and is connected to the terminal. 5 is controlled so that the terminal voltage of 5 always becomes a constant voltage.

  Further, an annular step 17 is formed at a position facing the front bracket 2 and the rear bracket 3 in the axial direction, and a stator 18 as a first member formed in an annular shape is sandwiched between the steps 17. It is fixed. The inner peripheral side of the stator 18 is inserted in a non-contact state into an annular gap 15 formed in the rotor 12. Since the length between the side surface in the rotation axis direction of the magnetic pole portion 12b of the rotor 12 and both end surfaces in the axial direction of the stator 18 is preferably as small as possible, the gap is as small as possible.

The stator 18 is composed of a stator core 18a made of a magnetic material and a plurality of stator coils 18b as first coils built in the stator core 18b. The rectifier circuit 19 is connected to the battery via the terminal 5. In addition, the coil of Claim 1, Claim 3, and Claim 6 is equivalent to the stator coil 18b in a present Example.

  Although not shown, the rectifier circuit 19 is composed of a plurality of diodes. Since these diodes constitute independent three-phase 2Y coils, a full-wave rectification is achieved with 12 diodes. It has become.

  Next, based on FIG.2 and FIG.3, the detail of the rotor as a rotor and a stator is demonstrated. FIG. 2 is a perspective view of a magnetic circuit portion of a rotor and a stator as a rotor, in which 1/3 of the entire circumference is partially sectioned, and FIG. 3 is a perspective view of the stator coil. Is.

  As shown in FIG. 2, the magnetic pole portions 12 b of the front rotor member 12 </ b> F and the rear rotor member 12 </ b> R have a plate shape and face both axial ends of the stator 18. Further, a plurality (six in this embodiment) of convex portions 20 are formed radially on each magnetic pole portion 12b. Thus, both the front rotor member 12F and the rear rotor member 12R are formed with the magnetic pole portions 12b in substantially the same shape, and the convex portions 20 of the respective rotor members are in substantially the same position in the rotational direction. Fixed. In the rotor 12 thus formed, one rotor member is an N pole magnetic pole, and the other rotor member is an S pole magnetic pole. For this reason, magnetic paths are formed by the number of pairs (six in this embodiment) facing the axial direction of the convex portion 20 of the front rotor member 12F and the convex portion 20 of the rear rotor member 12R. In this embodiment, the magnetic pole portion 12b of the front rotor member 12F is an N pole magnetic pole, and the magnetic pole portion 12b of the rear rotor member 12R is an S pole magnetic pole.

  Next, the stator 18 will be described. As described above, the stator 18 includes the stator core 18a and the stator coil 18b. First, the one-phase portion of the stator coil 18b will be described. The stator coil 18b is formed by forming a wire into a wave winding shape substantially along the outer edge of the magnetic pole portion 12b of the rotor 12, and then crushing from the axial direction. Is a substantially rectangular shape, more specifically, a substantially rectangular cross-section that becomes thinner in the axial direction. Further, the stator coil 18b is formed in an annular shape so that irregularities are formed in the radial direction. By forming the stator coil 18b in this manner, the outer peripheral portion 21 which is a convex tip and the inner peripheral portion which is a concave bottom portion. A communication portion 23 that communicates 22 in the radial direction is formed. An insulating film is applied to the outer peripheral surface of the stator coil 18b. The stator coil 18b formed in this way is arranged in six phases, that is, six stages aligned in the axial direction while being shifted by 30 degrees in electrical angle. In addition, assembling is facilitated by providing notches and alignment marks on the fixed portion so that a predetermined angle can be shifted in each phase. These stator coils 18 b are taken out from a part in the circumferential direction on the outer peripheral side and connected to the rectifier circuit 19.

  All parts other than the stator coil 18b are filled with a dust core obtained by insulating and solidifying the surface of the magnetic powder, and this part becomes the stator core 18a. That is, the stator core 18a completely fills the periphery of the stator coil 18b, and the outer shape is formed in an annular shape. In each figure, the stator core 18a is shown as an integral shape. However, a structure composed of the stator coil 18b and the stator core 18a is created for each phase, and an electrical angle is used when the structure is assembled. Each of the stacked ones shifted by a predetermined angle is manufactured by being integrated by welding or the like. In the case of the present embodiment, since it is a six-phase coil, the structure is configured by stacking six stages.

  Next, the operation of this embodiment will be described.

First, rotation is transmitted from the crankshaft to the pulley 8 via the belt as the engine starts, and therefore the rotor 12 as a rotor is rotated via the shaft 7. Here, when a direct current is supplied from the brush 11 to the field coil 16 provided in the rotor 12 via the slip ring 10, a magnetic flux that circulates around the inner and outer periphery of the field coil 16 is generated. The N pole or the S pole is formed on the convex portion 20 of the. The magnetic flux generated by the field coil 16 passes through the stator 18 in the axial direction from the N pole projection 20 of the front rotor member 12F, and reaches the S pole projection 20 of the rear rotor member 12R. A magnetic circuit is formed to circulate through the shaft portion 12a. The magnetic flux of this magnetic circuit links the communicating portion 23 in the stator coil 18b, so that a six-phase AC induced voltage is generated in each of the stator coils 18b.

  The AC voltage thus generated is full-wave rectified by the rectifier circuit 19 and converted into a DC voltage. The rectified DC voltage is achieved by controlling the field coil current with an IC regulator (not shown) so as to be a constant voltage of about 14.3V.

  Next, the function and effect of this embodiment will be described.

  In this embodiment, the stator as the first member has a coil formed in an annular shape so as to form a plurality of communicating portions that communicate the inner peripheral side and the outer peripheral side, and a magnetic material is provided around the coil. Since the material is filled into an annular member, almost no gap is formed between the coil and the magnetic material. For this reason, the space factor of the coil with respect to the coil mounting part in a magnetic material can be improved significantly.

  In this stator, the periphery of the coil is filled with a magnetic material. However, the rotor as the second member has different magnetic poles on each surface facing the both axial ends of the stator, and Since a plurality of magnetic poles are formed in the circumferential direction, only a plurality of magnetic paths that pass through the stator in the axial direction are formed, and there is almost no magnetic flux that circulates within the stator. For this reason, it becomes possible to use the stator which filled the circumference | surroundings of the coil with the magnetic material.

  In addition, the coil in the stator as the first member is formed in an annular shape so as to be uneven in the radial direction, and the rotor as the second member has respective surfaces facing both ends in the axial direction of the stator. Since the plurality of projections are provided radially, the configuration can be simplified and the plurality of magnetic fluxes can be surely passed through the stator in the axial direction.

  Further, in the present embodiment, the stator as the first member is formed with a plurality of first member constituents by filling a magnetic material around the coil for each phase, and each first member constituent is formed into an electrical angle. Thus, the magnetic material can be surely filled in a portion where the magnetic material is difficult to enter even in a plurality of phases.

  In this embodiment, since the generator is used as a rotating electrical machine, the structure of the rotor can be changed from a conventional claw-shaped magnetic pole to a convex magnetic pole shape. For this reason, the present invention eliminates the need to leave a gap with the stator in consideration of the rising of the claw due to the centrifugal force peculiar to the claw-shaped magnetic pole. Further, since there are no slots in the stator, eddy current loss due to slot ripple can be reduced, and the efficiency can be improved.

  In this embodiment, since the stator coil is molded and insulated and disposed in the stator, the stator does not need to be insulated and has an excellent assembly property.

  Further, in this embodiment, since the stator core is a dust core, eddy current loss hardly occurs and an improvement in efficiency can be expected. In addition, an effect of improving recyclability can be expected.

  In this embodiment, since the stator coil has a shape that is thinner in the axial direction, the axial width of the stator can be reduced while securing the cross-sectional area of the stator coil, and further downsizing of the device can be achieved. Can be planned.

  In this embodiment, since the stator coil has a plurality of phases, the change in voltage can be minimized as much as possible when the AC voltage is converted into the DC voltage by the rectifier circuit.

  In the present embodiment, the stator core is a dust core, but any magnetic material may be used. For example, the magnetic material may be melted and poured into a mold in which the stator coil is disposed. Further, in this case, it is not necessary to form a structure for each phase, and a plurality of phases can be integrally formed.

  In the present embodiment, the stator core has an annular shape, but may have any shape as long as it is annular, for example, a polygonal shape.

  In the present embodiment, the stator coil has a quadrangular cross section, but may be a coil having a normal round cross section.

  Further, in this embodiment, the stator coil is wave-wound, but it is only necessary to form a plurality of communicating portions that communicate the inner peripheral side and the outer peripheral side. For example, a portion that is convex on the outer peripheral side is formed. It is also possible to mold while rotating around the inner and outer periphery.

  Further, in this embodiment, the stator coil has six phases, but it may be a single phase.

  In the present embodiment, the stator coil is configured to be completely embedded in the magnetic material of the stator core. However, the portion facing the outside may not be surrounded by the magnetic material. That is, the circumference of the coil described in the claims is not the entire circumference of the coil but the circumference where the magnetic material faces.

  Further, in this embodiment, the magnetic pole part has an uneven shape, but the concave part can be filled with a nonmagnetic material.

  In this embodiment, the vehicle AC generator is described as an example of the rotating electrical machine. However, it is also possible to operate as a motor by adding an inverter.

  In this embodiment, the field coil is provided in the rotor to generate the magnetic flux. However, a permanent magnet may be provided in place of the convex portion in the rotor to generate the magnetic flux.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a perspective view of a magnetic circuit portion of the rotor and the stator, in which 1/3 of the entire circumference is partially sectioned, as in FIG. In addition, about the site | part which is common in 1st Example, it represents with the same name and the same code | symbol.

  The difference between the first embodiment and the second embodiment is that the number of convex portions 20 provided on the magnetic pole portion 12b of the rotor 12 as a rotor is large, and the permanent magnets 24 are arranged between the convex portions 20. Is a point.

  As shown in FIG. 4, in the second embodiment, a state in which permanent magnets 24 are arranged between the N-pole protrusions 20 of the front rotor member 12F and between the S-pole protrusions 20 of the rear rotor member 12R; However, the rotor 12 and the permanent magnet 24 are integrated using two-color molding in which two different materials are molded together. The magnetization direction of the permanent magnet 24 disposed between the convex portions 20 of the front rotor member 12F is the S pole on the surface facing the stator 18 which is different from the pole of the convex portion 20 of the front rotor member 12F. The outer end surface side in the rotation axis direction is an N pole similar to the pole of the convex portion 20 of the front rotor member 12F. Further, the magnetization direction of the permanent magnet 24 disposed between the convex portions 20 of the rear rotor member 12R is an N pole that is different from the pole of the convex portion 20 of the rear rotor member 12R on the surface facing the stator 18. The outer end surface side in the rotation axis direction is an S pole similar to the pole of the convex portion 20 of the rear rotor member 12R.

  As described above, in this embodiment, a plurality of permanent magnets extending in the radial direction and magnetic materials are alternately provided in the circumferential direction on the respective surfaces of the rotor facing the both axial ends of the stator. Magnetic flux is also generated between the opposing permanent magnets to generate power. For this reason, the power generation efficiency is improved as compared with the first embodiment.

  In this embodiment, the permanent magnet is integrally formed with the rotor, but separately manufactured ones may be fixed with an adhesive or the like.

  In the present embodiment, the permanent magnet has a substantially sector shape in the drawing, but may have any shape as long as it extends in the radial direction.

[Third embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a perspective view of a magnetic circuit portion of a rotor and a stator as a rotor, similar to FIGS. 6 is a perspective view excluding the auxiliary magnetic pole plate on the front rotor member side in FIG. 5, and FIG. 7 is a perspective view further omitting the front rotor member, permanent magnet, and stator core. Is. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  As shown in FIG. 5, in the third and second embodiments, an auxiliary magnetic pole plate 25 as an auxiliary magnetic pole member made of a magnetic material is provided on the outer side in the axial direction of the magnetic pole portion 12b, and the stator coil. The difference from the second embodiment is that 18b has three phases.

As shown in FIG. 6, a step 22 is provided on the outer end side in the axial direction of the magnetic pole portion 12b of the front rotor member 12F and the rear rotor member 12R. Specifically, the step 26 is provided on the outer peripheral side of the convex portion 20 in the magnetic pole portion 12b, but the step 26 is not formed from the root portion on the inner peripheral side of the convex portion 20, and slightly from the root portion, A step 26 is formed with a gap in the outer periphery. Thus, by providing the level | step difference 26 in each convex part 20, it becomes the substantially annular | circular shaped auxiliary | assistant magnetic pole plate 25 as a whole.

  Further, since the permanent magnet 24 has substantially the same axial thickness as the outer peripheral side of the convex portion 20, the permanent magnet 24 is not provided with a step, and the root portion on the inner peripheral side of the convex portion 20. It extends to. For this reason, the space between the thin portions on the outer peripheral side of the respective convex portions 20 is completely filled with the permanent magnet 24.

As shown in FIG. 5, the auxiliary magnetic pole plate 25 is fixed by press-fitting according to the shape of the thin portion of the auxiliary magnetic pole plate 25, that is, a substantially annular auxiliary magnetic pole plate 25. Further, the auxiliary magnetic pole plate 25 is formed of a magnetic material, and a concave portion is formed on the inner peripheral side of the convex portion 20 so that a thick portion left on the inner peripheral side of the convex portion 20 can be inserted. The same number is formed.

  Further, the stator coil 18b in this embodiment has three phases unlike the six phases in the second embodiment. For this reason, as shown in FIG. 7, in each phase, the stator 18 of the second embodiment is also thinned.

  Here, the magnetic flux of the permanent magnet circulates so that it passes through the stator in the axial direction from one permanent magnet and returns from the outer end side in the axial direction of the other permanent magnet through the inner peripheral side of the rotor. In the example, by providing an auxiliary magnetic pole plate as a magnetic material at the axially outer position of the permanent magnet, it is possible to easily pass the magnetic flux from the axially outer position of the other permanent magnet to the inner peripheral side of the rotor. For this reason, the efficiency can be further improved as compared with the second embodiment.

  Further, in this embodiment, the auxiliary magnetic pole plate has an annular integrated structure, so that the increase in the number of parts can be minimized and the mounting is easy.

  Further, in this embodiment, the unevenness is formed on the inner periphery of the auxiliary magnetic pole plate, and the unevenness is also formed on the step provided on the rotor and fixed so as to match each other. Therefore, it is possible to prevent the rotor from rotating with respect to the rotor. Further, when the permanent magnet is configured separately from the rotor and then assembled together, the permanent magnet can be inserted from the axial direction along the concave portion formed in the rotor. For this reason, assembly becomes easy.

  Further, in this embodiment, since the stator coil has three phases, the stator can be made thin and a compact device can be obtained.

  In the present embodiment, the auxiliary magnetic pole plate is made of a member different from the rotor, but can be integrated with the rotor. In this case, the number of parts can be reduced.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a perspective view of a state in which a part of a rotor as a stator and a rotor is cut off. In addition, about the site | part which is common in another Example, it represents with the same name and the same code | symbol.

  As shown in FIG. 8, the fourth embodiment and the third embodiment are different in that the auxiliary magnetic pole plate 25 is not formed in an annular shape as in the third embodiment, but is arranged only on the back surface of the permanent magnet 25.

  The auxiliary magnetic pole plate 25 of the present embodiment is formed in a substantially fan shape like the axial end face shape of the permanent magnet 25, and the inner peripheral side is welded or bonded to the rotor 12 in close contact with the axial outer end face of the permanent magnet 25. It is fixed by bonding with an agent.

  Since the auxiliary magnetic pole plates of the present embodiment are distributed in the circumferential direction, the rotor mass can be reduced compared to the third embodiment.

  Although the auxiliary magnetic pole plate in the present embodiment is substantially fan-shaped, the shape may be any shape, and it is not necessary to make it larger than the area of the end face in the axial direction of the permanent magnet. However, if the auxiliary magnetic pole plate is made larger than the area of the end face in the axial direction of the permanent magnet, the magnetic flux can be more easily passed.

  Next, inventions other than those described in the claims that can be grasped from each of the above embodiments will be described below together with the effects thereof.

  (1) The rotating electrical machine according to claim 1, wherein the magnetic material of the first member is a powder magnetic core obtained by insulatingly coating the surface of the magnetic powder. According to such a configuration, almost no eddy current loss occurs and an improvement in efficiency can be expected. In addition, an effect of improving recyclability can be expected.

  (2) The rotating electrical machine according to claim 1, wherein a cross section of the coil is thin in an axial direction. According to such a configuration, the axial width of the first member can be reduced while securing the cross-sectional area of the coil.

  (3) In the rotating electrical machine according to claim 2, the coil is formed in a shape substantially along an outer edge of each surface of the second member facing both axial ends of the first member. A rotating electric machine that is characterized. According to such a configuration, since the coil efficiently traverses the magnetic flux, the efficiency of the rotating electrical machine can be improved.

  (4) The rotating electrical machine according to claim 4, wherein the permanent magnet and the magnetic material in the rotor are integrally formed. According to such a configuration, it is possible to prevent the permanent magnet from falling off the rotor due to centrifugal force.

  (5) In the rotary electric machine according to claim 5, an auxiliary magnetic pole plate made of a magnetic material formed in an annular shape is attached to the rotor at an axially outer position of the permanent magnet. Rotating electric machine. According to such a configuration, since it is not necessary to provide an auxiliary magnetic pole plate for each permanent magnet, the number of parts is small and assembly can be facilitated.

  (6) The rotating electrical machine according to (5), wherein a rotation preventing portion is provided at a fixed portion between the auxiliary magnetic pole plate and the rotor. According to such a configuration, relative rotation between the auxiliary magnetic pole plate and the rotor can be prevented even when an inertial force is applied.

  (7) In the rotating electrical machine according to (6), the permanent magnet is attached to and integrated with the rotor, and the rotation preventing portion is provided on both the auxiliary magnetic pole plate and the rotor. The rotating electric machine is characterized in that each of the rotors is fitted with a concavo-convex portion, and the concave portion of the concavo-convex portion is positioned along the mounting portion of the permanent magnet in the rotor. According to such a configuration, the permanent magnet can be easily inserted into the rotor from the axial direction.

  (8) The rotating electrical machine according to (5), wherein a plurality of the auxiliary magnetic pole plates are provided for each facing portion of the permanent magnet. With such a configuration, the rotor can be reduced in weight.

1 is a sectional view of an axial side surface of an automotive alternator as a first embodiment of the present invention. 1 is a perspective view of a magnetic circuit portion of a rotor and a stator according to a first embodiment of the present invention, in which 1/3 of the entire circumference is partially sectioned. The perspective view of the stator coil in 1st Example of this invention is shown. FIG. 7 is a perspective view of a magnetic circuit portion of a rotor and a stator according to a second embodiment of the present invention in which one-third of the entire circumference is partially sectioned. FIG. 7 is a perspective view of a magnetic circuit portion of a rotor and a stator according to a third embodiment of the present invention, in which 1/3 of the entire circumference is partially sectioned. The perspective view except the auxiliary pole plate of the one side in 3rd Example of this invention is shown. The perspective view which abbreviate | omitted the rotor member, permanent magnet, and stator core of the one side in 3rd Example of this invention is shown. The perspective view of the state which cut off a part of stator and rotor in 4th Example of this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 ... Rotor (rotor, 2nd member), 12b ... Magnetic pole part, 15 ... Annular gap, 16 ... Field coil (2nd coil), 18 ... Stator (1st member), 18a ... Stator core, 18b ... stator coil (coil, first coil), 20 ... convex part, 23 ... communicating part, 24 ... permanent magnet, 25 ... auxiliary magnetic pole plate.

Claims (6)

A rotating electrical machine in which mutual members rotate relative to each other,
An insulating film is applied to the surface, and it has a coil formed in an annular shape so as to form a plurality of communication portions that communicate between the inner and outer peripheral sides, and a magnetic material is filled around the coil. A first member configured as an annular member;
An annular gap is formed in the circumferential direction, the first member is disposed in the annular gap at a predetermined interval, and different magnetic poles are formed on the respective surfaces facing both axial ends of the first member. And each of the magnetic poles has a second member configured to be formed in a plurality in the circumferential direction,
The rotating electrical machine characterized in that the first member and the second member rotate relative to each other. A rotating electrical machine in which mutual members rotate relative to each other,
An insulating film is applied to the surface, and the first coil is formed in an annular shape so that irregularities are formed in the radial direction. The periphery of the first coil is filled with a magnetic material to form an annular member. A first member;
An annular gap is formed in the circumferential direction, and the first member is disposed in the annular gap at a predetermined interval. A plurality of radial gaps are formed on each of the surfaces facing both axial ends of the first member. A second member provided with a convex portion;
A second coil provided at a bottom of the annular gap of the second member at a predetermined interval with respect to the first member,
The rotating electrical machine characterized in that the first member and the second member rotate relative to each other. A rotating electrical machine that generates electricity by mutually rotating relative members,
An insulating film is applied to the surface, and it has a coil formed in an annular shape so as to form a plurality of communication portions that communicate between the inner and outer peripheral sides, and a magnetic material is filled around the coil. A stator configured in an annular member;
A rotor formed with a plurality of magnetic paths that pass through the stator in the axial direction;
A rotating electric machine characterized in that a voltage is generated in the coil as the rotor rotates with respect to the stator. A rotating electrical machine that generates electricity by mutually rotating relative members,
An insulating film is applied to the surface, and a first coil is formed in an annular shape so as to form a plurality of communication portions that communicate between the inner peripheral side and the outer peripheral side, and a magnetic material is provided around the first coil. A stator configured into an annular member by filling
An annular gap is formed in the circumferential direction, and the stator is disposed in the annular gap at a predetermined interval, and a plurality of radially extending surfaces are provided on respective surfaces facing both axial ends of the stator. A rotor in which permanent magnets and magnetic materials are alternately provided in the circumferential direction;
A second coil provided at the bottom of the annular gap of the rotor at a predetermined interval with respect to the stator,
A rotating electric machine characterized in that a voltage is generated in the first coil when the rotor rotates with respect to the stator. In the rotating electrical machine according to claim 4,
A rotating electrical machine, wherein a magnetic material is provided at an axially outer position of the permanent magnet. An annular first member filled with a magnetic material is formed around a multi-phase coil having a radially extending portion whose surface is coated with an insulating film, and a plurality of magnetic paths that pass through the first member in the axial direction are formed. A method of manufacturing a rotating electrical machine having a second member that comprises:
The first member is formed by filling a magnetic material around the coil for each phase to form a plurality of first member constituents, and superposing the first member constituents in a state shifted by a predetermined angle by an electrical angle. The manufacturing method of the rotary electric machine characterized by integrating.

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