JP2007228677A - Generating set and rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a generating set wherein the space factor of a stator coil within a stator core can be enhanced and a stator can be cooled. <P>SOLUTION: The stator 18 is constructed of: the stator coil 18b annularly wound in the circumferential direction; and the stator core 18a that is provided around the stator coil 18b and has multiple claw magnetic pole portions 21b for alternately generating different magnetic flux formed in its portion opposite the outer circumference of a rotor 12. The rotor 12 is provided at its axial end faces on the outer circumferential side with fans 14F, 14R for sending air. The stator core 18a is provided with fins 20 having thermal conductivity. The fins are extended from both ends of the stator core in the axial direction so that they collide with air sent by the fans 14F, 14R. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power generation device and a rotating electrical machine that generate power by rotational motion, and more particularly to a vehicle AC power generation device.

  An explanation will be given by taking an automobile as an example where the power generation device is mounted. 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, the power generation device must be downsized while maintaining or improving efficiency. Such demands for both miniaturization and high efficiency are not limited to automobiles, but also apply to other products. Here, in order to achieve both miniaturization and high efficiency of the power generation device, a high space factor of the stator coil wound around the stator core is required.

  A stator coil is wound around a stator core in a vehicle AC power generator as shown in Patent Document 1 so as to reciprocate in the axial direction. However, in the case where the stator coil is wound by such a method, the space between the stator coil and the stator core inevitably increases, and the space factor of the stator coil in the stator core increases. It is difficult to improve.

  Therefore, as shown in Patent Document 2, magnetic pole portions extending alternately in the axial direction from both axial ends of the stator core are provided, and a stator in which the stator coil is wound around the outer periphery of the stator core is used. Known synchronous generators. Thus, when the stator coil is wound in an annular shape, the space factor of the stator coil in the stator core is larger than that in which the stator coil is wound so as to reciprocate in the axial direction as in Patent Document 1. Can be increased.

JP-A-2005-287123 JP 2005-151785 A

  As the stator becomes hot during power generation, heat loss increases and power generation efficiency deteriorates. Therefore, as shown in Patent Document 1, fans are provided on both end surfaces in the axial direction of the rotor, and on the stator side. Cooling air is blown. However, when this fan is attached to Patent Document 2, since the stator of Patent Document 2 does not have a coil end extending from the axial end of the stator core, the cooling air passes through and effective cooling is achieved. The problem of being unable to occur.

  However, when the stator coil is wound so as to reciprocate in the axial direction as in Patent Document 1, the coil end can be cooled by a fan, but the space factor of the stator coil in the stator core is reduced. It cannot be improved.

  An object of the present invention is to provide a power generator capable of improving the space factor of a stator coil in a stator core and cooling the stator.

  The power generator according to the present invention is alternately different in a stator coil in which a stator is annularly wound around an outer periphery of a rotor, and a portion provided around the stator coil and facing the outer periphery of the rotor. And a stator core made of a magnetic material on which a plurality of magnetic pole portions for generating magnetic flux are formed, and is integrated with the stator at a position where it collides with air blown from a fan provided on an axial end surface of the rotor. It is characterized by arranging fins that are provided.

  Further, the power generator of the present invention is disposed at a position where it collides with the air flowing by the air blowing mechanism and the air blowing mechanism that performs the air blowing action by rotating with the rotor to cool the stator, A cooling member that cools the stator as it is cooled by blowing is provided.

  Further, the power generator of the present invention is provided on the axial end surface of the rotor, and has a blade having an inclined surface inclined with respect to the radial direction, and the axial end surface of the stator, in order to cool the stator. A protrusion having thermal conductivity that is provided integrally and extends to a position facing the inclined surface of the blade is provided.

  The present invention can also be used for rotating electrical machines such as electric motors.

  The power generator and the rotating electrical machine of the present invention can improve the space factor of the stator coil in the stator core and cool the stator.

[First embodiment]
A first example of an AC generator for a vehicle mounted on an automobile, which is one embodiment of a power generator as a 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 housing 2 disposed on the left side in FIG. 1 and a rear housing 3 disposed on the left side in FIG. 1, and each housing is accommodated inside. It has a bottomed cylindrical shape having a space, that is, a bowl shape. These housings have a large number of holes of various shapes through which air flows. Further, the front housing 2 and the rear housing 3 are integrally provided with fixing portions 2b and 3b in which bolt holes 2a and 3a are opened 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 housing is attached to the axial end of the rear housing 3, and the rear cover 4 has a bottomed cylindrical shape having an accommodating space inside, that is, a bowl shape, like the housing. . A hole for air to flow through is also opened at the axially outer end of the rear cover 4, and a terminal 5 connected to the battery is attached to the outer periphery of the hole.

  Ball bearings 6F and 6R serving as bearings are attached to the radial center at the axially outer ends of the front housing 2 and the rear housing 3, respectively. The ball bearing 6F attached to the front housing 2 is A ball bearing having a larger outer diameter than the ball bearing 6R attached to the rear housing 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 housing 2 and the rear housing 3.

  A pulley 8 as a rotation transmission member is fixed to the end of the shaft 7 on the front housing 2 side so as to rotate integrally with a bolt 9, and 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 housing 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. Thus, the rotor 12 as a rotor is constituted by the front rotor member 12F and the rear rotor member 12R fixed to the shaft 7.

  A plate-like front fan 14F and rear fan 14R having a plurality of blades on the outer peripheral side are attached to both ends of the rotor 12 in the rotation axis direction, respectively, and rotate integrally with the rotor 12. For this reason, as indicated by the dashed arrows, external air is introduced from the holes opened in the axially opposite ends of the front housing 2, the rear housing 3, and the rear cover 4 and out of the holes opened radially outward. For this reason, the rotor 12 and the rectifier circuit 19 to be described later are cooled.

  The front-side rotor member 12F and the rear-side rotor member 12R include a shaft portion 12a located on the inner peripheral side and a claw portion 12b having an L-shaped axial cross section located on the outer peripheral side. A Landel type iron core is constituted by the axial ends of 12a facing each other and contacting each other. A field coil 16 is wound around the rotation axis between the outer periphery of the shaft portion 12a and the inner periphery of the claw portion 12b, and both ends of the field coil 16 extend along the shaft 7 to the slip ring 10 described above. Each is connected. 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 axial direction of the front housing 2 and the rear housing 3, and a three-phase stator 18 formed in an annular shape is sandwiched and fixed to the step 17. Has been. The stators 18 are insulated by a non-magnetic connecting plate 15 and are connected in the axial direction. Thus, the stator 18 is opposed to the outer periphery of the claw portion 12b of the rotor 12 with a slight gap.

  Further, the one-phase stator 18 includes a stator core 18a made of a magnetic material, and a stator coil 18b wound inside the stator core 18a in a circumferential direction along the stator core 18a. The stator coil 18 b is connected to a rectifier circuit 19 attached in the rear cover 4. Further, the rectifier circuit 19 is connected to the battery via the terminal 5.

  The rectifier circuit 19 is composed of a plurality of diodes. Since these diodes constitute independent three-phase 2Y coils, full-wave rectification is achieved with 12 diodes.

  Next, details of the rotor and the stator as the rotor will be described with reference to FIG. 2A 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. Only the stator of FIG. 2A is taken out, and FIG. 2C is a perspective view of the rotor.

  As shown in FIG. 2A, the front-side rotor member 12F and the rear-side rotor member 12R are provided with a plurality of L-shaped claw portions 12b in the circumferential direction from the axially outer end of the shaft portion 12a. As shown in FIG. 2C, the claw portion 12b extends substantially in the same width in the radial direction, and extends in a tapered shape such that the tip is narrow in the axial direction. In addition, a wide chamfer is applied to one end in the circumferential direction of the tapered portion of the claw portion 12b. The front-side rotor member 12F and the rear-side rotor member 12R formed in this way are arranged with the field coil 16 therebetween, and the ends of the shaft portions 12a are arranged so that the respective claw portions 12b are alternately positioned in the circumferential direction. Is fixed to the shaft 7 in a state of being in contact therewith.

A front fan 14F and a rear fan 14R are attached to the axially outer ends of the front side rotor member 12F and the rear side rotor member 12R, respectively, by welding or the like. The front fan 14F and the rear fan 14R have a symmetrical shape so that the cooling air is blown in the same direction as the rotor 12 rotates. The front fan 14F will be described as an example. As shown in FIG. 2A and FIG. In addition, a blade having an inclined surface that is bent substantially vertically and inclined with respect to the radial direction is integrally formed. The front fan 14F and the rear fan 14R thus formed are integrally fixed to the outer ends in the axial direction of the front rotor member 12F and the rear rotor member 12R by welding or the like. As described above, the front fan 14F, the rear fan 14R, and the rotor 12 as a rotor constitute a blower mechanism.

  Next, details of the stator 18 will be described with reference to FIGS. 2 (a) and 2 (b). As described above, the stator 18 is configured in three phases, and each is integrated in the axial direction via the connecting plate 15 made of a resin material that is a non-magnetic material. In addition, each stator 18 is fixed in a state of being shifted by 120 degrees in electrical angle according to the pitch of the rotor 12. Thus, the connection plate 15 serves as both insulation and coupling between the phases.

  One phase of the stator 18 is composed of a stator core 18a and a stator coil 18b. As shown in FIG. 2B, the stator core 18a is divided into two in the axial direction. Each stator core 18a is composed of an annular outer peripheral portion 21a provided on the outer peripheral side and a plurality of claw magnetic pole portions 21b as magnetic pole portions provided on the inner peripheral side of the outer peripheral portion 21a. It is formed with a powder magnetic core formed by compressing applied magnetic powder. Since both the outer peripheral portion 21a and the claw magnetic pole portion 21b have an L-shaped radial cross section, the entire radial cross section has a U-shape. Further, the claw magnetic pole portion 21b is formed so that the tip thereof is tapered in the axial direction, like the claw portion 12b of the rotor 12.

  The stator core 18a composed of the two members configured as described above is provided with a stator coil 18b wound in an annular shape in the circumferential direction along the stator core 18a and provided with an insulating coating. The claw magnetic pole portions 21b are arranged opposite to each other so as to be alternately arranged in the circumferential direction and closely contact each other, and the outer peripheral side is integrated with resin or the like to constitute one phase of the stator 18. Note that insulating paper, which is an insulating member, may be disposed between the stator core 18a and the stator coil 18b.

  The stator 18 arranged at both ends in the axially outer side of the stator 18 thus configured is provided with cooling members and fins 20 as protrusions at the axial ends. The fins 20 are configured by a substantially rectangular plate, and a plurality of pairs (two pairs in the present embodiment) are fixed to each other at a predetermined interval on the outer peripheral side of the portion where the claw magnetic pole portions 21b are provided. . The fins 20 are made of a metal material having thermal conductivity, are made of substantially the same material as the stator core 18a, and have openings at positions facing the fins 20 in the front housing 2 and the rear housing 3. Is provided.

  Next, the operation of this embodiment will be described.

  First, rotation is transmitted from the crankshaft to the pulley 8 through the belt as the engine is started, so the rotor 12 as a rotor is rotated through 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 circumferences of the field coil 16 is generated. A pole or an S pole is formed. The magnetic flux generated by the field coil 16 circulates around the stator coil 18b from the N pole claw portion 12b of the front rotor member 12F through the claw magnetic pole portion 21b on the one side of the stator 18, and the claw magnetic pole on the other side. It reaches part 21b. Further, when this magnetic flux reaches the S pole claw portion 12b of the rear rotor member 12R, a magnetic circuit is formed that goes around the rotor 12 and the stator 18. Since such a magnetic circuit is generated for each phase, a three-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.

  Further, when the rotor 12 rotates, the fans 14F and 14R also rotate with the rotor 12, and the flow of air that takes in external air from the axial direction and discharges it in the outer peripheral direction as shown by the broken line arrows in FIG. Form. For this reason, an air flow collides with the fin 20 provided in the stator core 18a. The air flowing in from the rear cover 4 is discharged in the outer peripheral direction via the rectifying circuit 19.

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

  In the present embodiment, the stator coil is annularly wound around the outer periphery of the rotor, and the magnetic fluxes that are alternately different from each other are provided around the stator coil and facing the outer periphery of the rotor. And a stator core made of a magnetic material formed with a plurality of magnetic pole portions, and integrally with the stator at a position where it collides with air blown from a fan provided on an axial end surface of the rotor. Since the provided fins are arranged, the stator can be cooled by colliding with air blown to the fins to which heat is transmitted from the stator even if the stator has no coil end. For this reason, the space factor of the stator coil in a stator core can be improved, and a stator can be cooled.

  Further, in this embodiment, the fins are formed in a plate shape extending toward the outer peripheral side, and since a plurality of the fins are arranged in the circumferential direction of the stator, the flow velocity of the air blown from the fan falls by colliding with the fins. rare. For this reason, since the air circulation amount is increased, the cooling efficiency can be improved.

  Moreover, since the fin of the present embodiment is disposed on the outer peripheral side of each magnetic pole portion, it is possible to effectively cool a portion where the temperature is likely to increase.

  Further, in the present embodiment, since the opening portion that opens to the outside is provided at the portion facing the fin in the housing, the blown air can be easily discharged to the outside. For this reason, since the air circulation amount is increased, the cooling efficiency can be improved.

  In the present embodiment, since a plurality of fins are arranged in the circumferential direction of the stator, the cooling effect can be improved.

  In this embodiment, the fin is made of metal like the stator, so that heat transfer can be facilitated and cooling can be facilitated.

  Further, in this embodiment, since the plurality of blades provided on the fan are made of a single plate material, the number of parts can be reduced and the cost can be reduced.

  In this embodiment, since the fan is formed of a metal material having thermal conductivity and is fixed to the rotor, it is possible to promote the heat release of the rotor in addition to the action of blowing air.

  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 the present embodiment, the plurality of blades provided on the fan are made of a single plate material, but the blades provided separately can also be fixed to the rotor. In this case, since the base part which supports a blade | wing is lose | eliminated, it can reduce in weight.

  In this embodiment, the fan is made of a metal material. However, the fan may be made of a non-magnetic material such as a resin material. In this case, the magnetic flux flowing in the rotor can be stabilized without flowing into the fins.

  Further, in this embodiment, the air is configured to flow from the inner peripheral side to the outer peripheral side by the fan. However, air may be sucked from the outer peripheral side and discharged from the inner peripheral side. In this case, the fin is cooled by the intake air upstream of the fan.

  In this embodiment, the fin is formed separately from the stator core and fixed by welding. However, it is also possible to form the fin integrally with the stator core from the beginning. In this case, the number of parts can be reduced.

  Further, in this embodiment, the fan is symmetrical on the front side and the rear side, but since there is a rectifier circuit on the rear side, the air flow rate on the rear side may be larger than the front side, and the fins The number may be increased or the area may be increased so that the cooling effect on the rear side is greater than that on the front side.

  Further, in this embodiment, the fin has a simple plate shape, but can be appropriately changed according to the arrangement space and the ease of attachment.

  Further, in this 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 molding die in which the stator coil is disposed.

  In this embodiment, the stator coil has three phases, but the number of phases can be freely selected. The number of phases is preferably a multiple of 2 and a multiple of 3.

  In the present embodiment, the vehicle AC generator has been described as an example of the power generator. However, the generator may be used in any case. In this case, the rotor is provided with a permanent magnet instead of the field coil, and the magnetic flux May be generated.

  In the present embodiment, the generator is described as the rotating electrical machine. However, the generator can be used for an electric motor such as an induction motor in which the rotor rotates by energizing the stator coil. Furthermore, it can also be used for a rotating electrical machine that controls switching between a generator and an electric motor.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4 (a) to (c). FIG. 3 is a cross-sectional view of the axial side surface corresponding to FIG. 4 (a) to 4 (c) are also illustrated in FIG.
It is detail drawing of the rotor and stator corresponding to (c). 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 claw portion 12b of the rotor 12 as a rotor is not tapered but formed to have substantially the same width, and the claw portion 12b is not It is the point which is supported and fixed between the side plates 22F and 22R as the connecting member of the magnetic body, and the point that the permanent magnet 23 is disposed between the claw portions 12b.

  As shown in FIG. 4C, the front side rotor member 12F and the rear side rotor member 12R of the second embodiment are a member and a shaft in which convex portions extending radially are formed at six locations in the circumferential direction of the disk-like member. The base part is integrated with the part 12a, and the claw part 12b is fixed to the outer peripheral side of the base part and extends in substantially the same width in the axial direction, and both are integrated by welding. Further, the claw portions 12b provided on the front rotor member 12F and the claw portions 12b provided on the rear rotor member 12R are end portions of the shaft portion 12a so as to be alternately positioned in the circumferential direction as in the first embodiment. It fixes to the shaft 7 in the state which mutually contact | abutted.

As shown in FIG. 4 (a), the front rotor member 12F and the rear rotor member 12R have a disk-like shape as a connecting member formed of resin that is a non-magnetic material at the outer ends in the axial direction. Side plates 22F and 22R are attached by an adhesive or the like. For this reason, each nail | claw part 12b will be supported by the axial direction both ends. Blades constituting the fans 14F and 14R are attached to the side plates 22F and 22R. In FIG. 4C, the side plate 22F attached to the front rotor member 12F is omitted.

  Further, as shown in FIG. 4 (c), a hook-shaped fixing portion 24 made of a protrusion extending in the axial direction is provided at both circumferential edges of each claw portion 12b, and a permanent magnet 23 is provided on the inner circumferential side thereof. Is attached. For this reason, even if a centrifugal force acts on the permanent magnet 23, it does not come off to the outer peripheral side. The polarity of the permanent magnet 23 is magnetized in the direction in which the same polarity as that of the claw portion 12b faces (reinforces).

  Further, the connecting plate 15 in this embodiment is provided with a phase alignment function by providing notches and alignment marks on the fixed portions so that each stator 18 can be accurately positioned in a state where it is shifted by 120 degrees in electrical angle. ing.

  As described above, in this embodiment, the claw portions are formed as parallel magnetic poles extending in the axial direction with substantially the same width, so that all the axial lengths of the rotor can be effectively used, and the power generation output can be increased.

  In this embodiment, since the permanent magnet is disposed between the claw portions, the magnetic flux easily passes from the claw portion to the stator side. For this reason, power generation efficiency improves.

  Moreover, in a present Example, it becomes a structure which supports the axial direction both ends by fixing the front-end | tip of a mutual nail | claw part to a side plate. For this reason, it can prevent a nail | claw part rising from centrifugal force. For this reason, between a rotor and a nail | claw part can be made small and electric power generation efficiency improves.

  In this embodiment, the front-side rotor member and the rear-side rotor member are separately formed into a base portion and a claw portion, and then fixed, but they can be integrally formed from the beginning. In this case, the number of parts can be reduced.

  In this embodiment, the side plate is made of a resin material, but a metal such as an aluminum material may be used as long as it is a non-magnetic material. Further, the side plate can be fixed using bolts or rivets in addition to being bonded to the rotor with an adhesive, and may be welded as long as they are weldable materials.

  In this embodiment, a groove in which the claw portion or the base portion can be fitted may be provided on the inner side surface in the axial direction of the side plate. In this case, it is possible to reliably prevent the claw portion from rising due to centrifugal force and to fix the rotor to the rotor easily.

  Further, in this embodiment, the blades constituting the side plate and the fan are provided separately and then fixed, but it is also possible to form them integrally from the beginning. In this case, the number of parts can be reduced.

[Third embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS. 5 and 6A and 6B. FIG. 5 is a cross-sectional view of the axial side surface corresponding to FIGS. 1 and 3. FIGS. 6A and 6B are also detailed views of the rotor and the stator corresponding to FIGS. 2 and 4A and 4B. In addition, about the site | part which is common in 1st Example and 2nd Example, it represents with the same name and the same code | symbol.

  The difference between the second embodiment and the third embodiment is that six stators 18 are used and that the claw magnetic pole portions 21b of the stator 18 are not tapered but extend to substantially the same width.

As shown in FIGS. 5, 6 (a), and 6 (b), six stators 18 are provided, and the claw magnetic pole portions 21 b of the stator 18 extend in the axial direction with substantially the same width. Further, two claw magnetic pole portions 21b are arranged in pairs so as to be in the same position in the circumferential direction. If the leftmost stator in the figure is a U-phase, for example, the second stator is U-phase because it is in reverse phase. The third stator is the W phase, the fourth is the W-phase, the fifth is the V-phase, and the sixth is the V-phase. If the -phase winding directions of each phase are reversed, they are in phase, but the phase difference is 60 degrees in terms of electrical angle, so the stator coil 18b is a three-phase coil.

[Fourth embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is a perspective view of the stator.

  The difference between the third embodiment and the fourth embodiment is that each stator 18 is configured to be shifted by 30 degrees in electrical angle. For this reason, the stator coil 18 has six phases, and the variation in voltage after rectification can be leveled.

  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) A rotor in which a plurality of magnetic fields having different poles in the circumferential direction are generated, and a plurality of magnetic pole portions provided in the circumferential direction so as to alternately extend substantially in the axial direction from both ends in the axial direction toward the other end. A rotor composed of a magnetic body, a field coil that is annularly wound around the inner peripheral side of the magnetic pole portion of the rotor and supplied with current as needed, and an axial direction of the rotor A rotor comprising: a connecting member made of a non-magnetic material that is provided at both ends and fixes an axial end portion of the rotor and an extending end portion of the magnetic pole portion. In the conventional Landell type rotor having the claw magnetic pole, the tip of the claw rises to the outer peripheral side by centrifugal force during high-speed rotation, and the space between the stator and the stator cannot be shortened. Since the tip of the magnetic pole part is fixed, the magnetic pole part can be prevented from rising due to centrifugal force even if the rotor rotates at high speed.

  (2) An AC power generator for a vehicle, which is composed of a magnetic body having a plurality of rotor magnetic pole portions provided in the circumferential direction so as to alternately extend substantially in the axial direction from both ends in the axial direction toward the other end. A rotor, a field coil wound in an annular shape on the inner peripheral side of the rotor magnetic pole portion in the rotor and supplied with a current controlled according to the state of the battery, and both axial ends of the rotor A connecting member made of a non-magnetic material that fixes the axial end of the rotor and the leading end of the rotor magnetic pole in the extending direction; and a plurality of stator magnetic poles provided so as to face the outer periphery of the rotor magnetic pole An AC power generator for a vehicle comprising a stator made of a magnetic body having a portion and a stator coil provided so that a magnetic flux flowing through the stator circulates around the stator. By configuring in this way, the same effect as the above (1) can be obtained.

  (3) The vehicle AC generator according to (2), wherein a fan is integrally formed with the connecting member. With such a configuration, an increase in the number of parts can be prevented.

  (4) The AC power generator for a vehicle has a plurality of rotor magnetic pole portions provided in the circumferential direction so as to alternately extend in the substantially axial direction with substantially the same width from the both ends in the axial direction toward the other end. A rotor composed of a magnetic material, a field coil that is wound in an annular shape in the circumferential direction on the inner peripheral side of the rotor magnetic pole portion in the rotor, and supplied with a current controlled according to the state of the battery; A stator made of a magnetic material having a plurality of stator magnetic pole portions provided so as to face the outer periphery of the rotor magnetic pole portion, and a stator coil provided so that magnetic flux flowing through the stator circulates around the stator. AC power generator for vehicles. By comprising in this way, all the axial lengths of a rotor magnetic pole part can be utilized effectively, and an electric power generation output can be enlarged.

  (5) The vehicle AC generator according to (4), wherein a permanent magnet is arranged between the rotor magnetic pole portions. With such a configuration, the permanent magnet can be easily arranged, and the magnetic flux easily flows from the rotor magnetic pole portion to the stator magnetic pole portion. For this reason, power generation efficiency improves.

  (6) The power generator according to claim 1, wherein the fan is integrally formed with the rotor. According to such a configuration, the number of parts can be reduced and the cost can be reduced.

  (7) The power generation device according to claim 1, wherein the fin is integrally formed with the stator core. According to such a configuration, the number of parts can be reduced, and heat transfer from the stator core is improved.

  (8) The power generator according to claim 1, wherein the stator core is formed of a dust core. According to such a configuration, there is no waste of material, almost no eddy current loss occurs, and further, the recyclability can be improved.

1 is a sectional view of an axial side surface of an automotive alternator as a first embodiment of the present invention. The detailed drawing of the rotor and stator in 1st Example of this invention is shown. Sectional drawing of the axial direction side surface of the alternating current generator for vehicles as 2nd Example of this invention is shown. The detailed drawing of the rotor and stator in 2nd Example of this invention is shown. Sectional drawing of the axial direction side surface of the alternating current generator for vehicles as 3rd Example of this invention is shown. The detailed drawing of the rotor and stator in 3rd Example of this invention is shown. The perspective view of the stator in 4th Example of this invention is shown.

Explanation of symbols

2 ... Front housing, 3 ... Rear housing, 12 ... Rotor (rotor), 14F ... Front fan (blade, blower mechanism), 14R ... Rear fan (blade, blower mechanism), 18 ... Stator, 18a ... Stator core 18b ... stator coil, 20 ... fin (cooling member, protrusion),
21b: Claw magnetic pole part (magnetic pole part).

Claims (10)

A power generator that generates power by applying a rotational force,
A plurality of different magnetic fluxes are alternately formed on the outer periphery, and a rotational force is transmitted from a driving source to perform a rotational motion,
A stator coil that is annularly wound around the outer periphery of the rotor, and a plurality of magnetic pole portions that are provided around the stator coil and alternately generate different magnetic fluxes in a portion facing the outer periphery of the rotor A stator constituted by the stator core made of a magnetic body formed with:
A fan that is provided on an end surface in the axial direction of the rotor and performs an air blowing action on the outer peripheral side by performing a rotational motion with the rotor;
A fin having thermal conductivity disposed at a position where it collides with air blown from the fan and provided integrally with the stator;
A power generation device comprising: A power generator that generates power by applying a rotational force,
A plurality of different magnetic fluxes are alternately formed on the outer periphery, and a rotational force is transmitted from a driving source to perform a rotational motion,
A stator coil having a plurality of magnetic pole portions that alternately generate different magnetic fluxes in a portion facing the outer periphery of the rotor;
An air blowing mechanism that performs an air blowing action by performing a rotational motion with the rotor;
A cooling member that is disposed at a position that collides with air flowing by the air blowing mechanism, and that cools the stator as it is cooled by air blowing;
A power generation device comprising: A power generator that generates power by applying a rotational force,
A plurality of different magnetic fluxes are alternately formed on the outer periphery, and a rotational force is transmitted from a driving source to perform a rotational motion,
A stator coil that is annularly wound around the outer periphery of the rotor, a magnetic pole portion that is provided so as to surround the stator coil, and that extends from one end in the axial direction and a magnetic pole that extends from the other end in the axial direction A stator constituted by the stator core made of a magnetic material provided alternately with portions;
A blade provided on an axial end surface of the rotor and having an inclined surface inclined with respect to a radial direction;
A protrusion having thermal conductivity provided integrally with the axial end surface of the stator and extending to a position facing the inclined surface of the blade;
A power generation device comprising: In the electric power generating apparatus of Claim 3,
The said protrusion is formed in the plate shape extended toward an outer peripheral side, The electric power generating apparatus characterized by the above-mentioned. In the electric power generating apparatus of Claim 3,
The power generation device according to claim 1, wherein the protrusion is disposed on an outer peripheral side of each of the magnetic pole portions. In the electric power generating apparatus of Claim 3,
The rotor and the stator are housed in a housing, and an opening that opens to the outside is provided at a portion of the housing that faces the protrusion. A rotating electric machine in which a rotor rotates with respect to a stator,
A plurality of different magnetic fluxes are alternately formed on the outer periphery, and a rotational force is transmitted from a driving source to perform a rotational motion,
A stator coil that is annularly wound around the outer periphery of the rotor, and a plurality of magnetic pole portions that are provided around the stator coil and alternately generate different magnetic fluxes in a portion facing the outer periphery of the rotor A stator constituted by the stator core made of a magnetic body formed with:
A fan that is provided on an end surface in the axial direction of the rotor and performs an air blowing action on the outer peripheral side by performing a rotational motion with the rotor;
A fin having thermal conductivity disposed at a position where it collides with air blown from the fan and provided integrally with the stator;
Rotating electric machine characterized by comprising. A rotating electric machine in which a rotor rotates with respect to a stator,
A plurality of different magnetic fluxes are alternately formed on the outer periphery, and a rotational force is transmitted from a driving source to perform a rotational motion,
A stator coil having a plurality of magnetic pole portions that alternately generate different magnetic fluxes in a portion facing the outer periphery of the rotor;
An air blowing mechanism that performs an air blowing action by performing a rotational motion with the rotor;
A cooling member that is disposed at a position that collides with air flowing by the air blowing mechanism, and that cools the stator as it is cooled by air blowing;
Rotating electric machine characterized by comprising. A rotating electric machine in which a rotor rotates with respect to a stator,
A plurality of different magnetic fluxes are alternately formed on the outer periphery, and a rotational force is transmitted from a driving source to perform a rotational motion,
A stator coil that is annularly wound around the outer periphery of the rotor, a magnetic pole portion that is provided so as to surround the stator coil, and that extends from one end in the axial direction and a magnetic pole that extends from the other end in the axial direction A stator constituted by the stator core made of a magnetic material provided alternately with portions;
A blade provided on an axial end surface of the rotor and having an inclined surface inclined with respect to a radial direction;
A protrusion having thermal conductivity provided integrally with the axial end surface of the stator and extending to a position facing the inclined surface of the blade;
Rotating electric machine characterized by comprising. The rotating electrical machine according to any one of claims 7 to 8, wherein
A rotating electric machine characterized in that the rotor rotates by energizing the stator coil.

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