JP2009027788A - Rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine which is equipped with a cooling fan that is high in cooling efficiency, has a high flexibility in form, and an improved high-speed strength, using a usual inexpensive metallic plate. <P>SOLUTION: In the rotary electric machine, where a cooling fan consisting of a metallic plate is fixed to a rotating shaft 1 constituting a rotor 2, the fan 3 is composed of: a first fan member 31 which has a plurality of first blades 312 being cut and erected in the direction of one side of the rotating shaft from a first main plate part 311 extended radially; and a second fan member 32 which has a plurality of second blades 322 being cut and erected in the direction of the other side of the rotating shaft from the second main plate part 321 superposed on this first fan member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine that can be preferably used as an AC generator, an AC generator motor, or the like for a vehicle such as an automobile.

  As a conventional rotating electrical machine, the cooling fan shape can be devised to increase the blade area or to match the bottom of the V-shaped groove of the claw-shaped magnetic pole piece to improve the cooling efficiency of the stator and rotor. (For example, refer to Patent Document 1). In addition, a blade is formed by cutting and raising from a metal plate, and at the same time, a protruding portion having a shape substantially along the outer peripheral shape of the rotor in the direction of the rotor is raised, thereby increasing the area where the wind hits and cooling efficiency. Some have been improved (for example, see Patent Document 2).

JP-A-9-154256 (first page, FIG. 3) Japanese Patent No. 3368831 (first page, FIG. 2)

However, in the conventional technique such as Patent Document 1, there is a problem that there is a limit to improving the cooling efficiency only with the device contrivance with the blade shape and the claw-shaped magnetic pole piece.
Further, in the conventional technology such as Patent Document 2, since the blade is cut and raised from a single fan, the blade area that can be formed protruding to the rotor side is small, and there is no degree of freedom in shape, so cooling efficiency can be improved. There was a problem that there was a limit. In addition, since the weight increases as the blade is made larger, a large stress is generated on the plate by centrifugal force, and the high-speed strength is significantly deteriorated.

  The present invention has been made to solve the above-described problems of the prior art. By using a normal inexpensive metal plate, the cooling efficiency is high, the degree of freedom of shape is high, and the high-speed strength is also high. An object of the present invention is to provide a rotating electrical machine equipped with a cooling fan.

  In the rotating electrical machine according to the present invention, in the rotating electrical machine provided with a cooling fan made of a metal plate that rotates together with the rotor, the fan is connected to the rotor from the first main plate portion extending in the radial direction. A first fan member having a plurality of first blades cut and raised in the lateral direction, and a second main plate portion superposed on the first fan member, and cut and raised in the other direction of the rotor. And a second fan member having a plurality of second blades.

  In this invention, the fan member is divided into a first fan member having a plurality of first blades cut and raised from the first main plate portion in one direction of the rotor, and a rotor member from the second main plate portion. Since the second fan member having a plurality of second blades cut and raised in the other direction is superposed back to back, the degree of freedom in shape is high, and the blade area can be easily expanded and cooled. Improves. Further, since the moments due to the centrifugal force of the blades cancel each other due to the polymerization of the main plate portions, the high-speed strength is enhanced.

Embodiment 1 FIG.
1 to 3 illustrate a vehicular AC generator motor as a rotating electrical machine according to Embodiment 1 of the present invention. FIG. 1 is a side sectional view showing a main part structure, and FIG. 2 is shown in FIG. FIG. 3 is a perspective view showing the cooling fan shown in FIG. 1. In the drawings, the same reference numerals denote the same or corresponding parts. In the figure, a rotating electrical machine 10 includes a field iron core 21 provided in a central portion of a rotating shaft 1, a rotor 2 having a field coil 22 for magnetizing the field iron core 21, and a field iron core 21. Two cooling fans 3 (3A, 3B) fixed to the rotary shaft 1, a stator 4 disposed so as to cover the rotor 2, a stator coil 41, and the stator 4 in the axial direction. Brackets 5 (a front bracket 5A and a rear bracket 5B) are provided that hold both ends of the rotor 2 through bearings so as to be held from both sides.

  A pulley 23 is attached to one end of the rotating shaft 1 (front side; right side in FIG. 1, left side in FIG. 2), and is connected to an internal combustion engine (both not shown) via a belt. A pair of slip rings 24 are fixed to the other end (rear side) of the rotating shaft 1, and a field current is supplied to the field coil 22 through a pair of brushes 51 attached to the bracket 5. The bracket 5 is mounted with a rectifier 52 for rectifying the stator current, a control circuit 53 for controlling the field current, and the like. The field core 21 is symmetrically formed with the field core A having a plurality of triangular claw portions disposed on the front side as shown in FIG. Each of which has a field core B having a field iron core B having a plurality of similar triangular claw portions, and valley portions 21a are formed between the base portions of the claw portions adjacent to each other in the circumferential direction. Yes.

  A typical mode of the fan 3 which is a characteristic part of the present invention is cut and raised in one direction of the rotary shaft 1 from the first main plate portion 311 extending in the radial direction as shown in FIGS. A first fan member 31 having a plurality of first blades 312 and a second main plate portion 321 superposed on the first fan member 31 are cut and raised in the other direction of the rotating shaft. And a second fan member 32 having a plurality of second blades 322. The first and second blades 312 and 322 are both formed in a planar shape that is substantially parallel to the direction of the rotating shaft 1 and substantially along the radial direction (radial direction) including the axis of the rotating shaft 1. It is formed by pressing from a thin metal plate.

  The second fan member 32 is fixed to the axial end surface of the field iron core 21 by fixing means (not shown) similar to the prior art, and the first fan member 31 is mutually attached to the second fan member 32. The main plate is superposed and fixed, and rotates together with the rotary shaft 1 and the field core 21. One fan 3 is provided at each end of the field core 21 in the axial direction. In the first embodiment, the front side fan 3A and the rear side fan 3B are composed of a field core. 21 is configured symmetrically with respect to 21 and is configured in a similar manner to each other except that it is fixed in a rotational direction indicated by an arrow C according to the positions of the front and rear valleys 21a. The description will focus on the fan 3A side, and the description of the configuration on the other fan 3B side will be omitted unless necessary and the configuration is different. For convenience, both the fan 3A and the fan 3B are referred to as the first fan member 31 on the side opposite to the rotor and the second fan member 32 on the rotor side.

  In the first embodiment, each of the first blade 312 and the second blade 322 is cut and raised from the front side in the rotational direction indicated by the arrow C of each of the first main plate portion 311 and the second main plate portion 321. The first and second pairs of blades that are formed in the circumferential direction and are adjacent to each other in the circumferential direction are combined with their positions shifted so that the first blade 312 is behind the second blade 322 in the rotational direction. Yes. In addition, the 2nd braid | blade 322 is provided so that it may approach into the trough part 21a formed between the base parts of the nail | claw part which the field iron core 21 adjoins. The bracket 5 is provided with a ventilation hole 5a for taking in cooling air from the axial direction and a ventilation hole 5b for discharging it in the radial direction. Since other configurations are the same as those of the conventional rotating electric machine, description thereof is omitted.

  Next, the operation of the first embodiment configured as described above will be described. The rotating electrical machine 10 is not shown in order to be driven by an internal combustion engine (not shown) through a belt and a pulley 23 to generate AC power in the stator coil 41 or to rotate the internal combustion engine by itself. The rotor 2 is rotated in the direction of arrow C by being driven as an AC motor by electric power from a battery or the like. When the rotor 2 rotates, the outside air is introduced into the rotating electrical machine 10 in the axial direction as indicated by an arrow D by the fan 3 and discharged from the ventilation port 5b in the radial direction, whereby the field coil 22, Each component such as the stator coil 41, the rectifier 52, and the control circuit 53 is cooled. At this time, the second blade 322 on the rotor 2 side of the fan 3 contributes to cooling of the field coil 22 by promoting the circulation and stirring of the air passing through the rotor 2. The first blade 312 on the bracket 5 side of the fan 3 contributes to cooling of the stator 4 positioned on the radial discharge side and cooling of the rectifier 52 and control circuit 53 positioned on the axial suction side of the fan 3. To do.

  In the first embodiment, the fan 3 is configured by superimposing the first fan member 31 and the second fan member 32, so that the blade composed of the first blade 312 and the second blade 322 is formed. The area is increased and the cooling capacity of the fan 3 is improved. Further, the centrifugal force acts on the first blade 312 and the second blade 322 that are bent in the axial direction by cutting and raising, and a bending moment in the axial direction is generated, but the first and second main plate portions Since the 311 and 321 are overlapped with each other so that their backs are aligned, the bending moment due to the centrifugal force of the first blade 312 and the second blade 322 acts in a direction in which they cancel each other. Reduced and high speed strength increased. Further, in order to increase the blade area, if it is attempted to realize the same configuration with a single plate material, complicated bending work and cutting work are required, which is expensive. In the present invention, the first fan member is used. Since the blade area is expanded by superimposing the two fan members 31 and the second fan member 32, each fan can be manufactured by inexpensive press processing, and the rotating electrical machine can be manufactured at low cost. can do.

  In addition, the first and second sets of blades that are close to each other in the circumferential direction are arranged so that the first blade 312 is disposed rearward in the rotational direction with respect to the second blade 322, so that the bracket Since the main plate portion 321 of the second fan member 32 is formed on the positive pressure surface portion of the first blade 312 on the fifth side, the fan wind pressure of the first fan member 31 is improved and the ability as the fan 3 is improved. . For this reason, the air volume increases, and for example, a member such as the rectifier 52 attached to the bracket 5 side disposed in the air passage is effectively cooled. In the first embodiment, the first fan member 31 of the front fan 3A and the second fan member 32 of the rear fan 3B, and the second fan member of the front fan 3A are used. 32 and the first fan member 31 of the fan 3B on the rear side are exactly the same, and can be shared, and only two types of fan members are required, and the fan member can be manufactured at low cost without increasing the number of parts.

  As described above, according to the first embodiment, the fan 3 includes the plurality of first blades 312 that are cut and raised in the one side direction of the rotary shaft 1 from the first main plate portion 311 extending in the radial direction. A plurality of second blades 322 formed by cutting the first fan member 31 and the second main plate portion 321 superposed on the first fan member 31 in the other direction of the rotation shaft. With the second fan member 32 having the above, the blade area is easily enlarged and the cooling performance is improved. In addition, the bending moment in the axial direction due to the centrifugal force acting on the blades cancels each other out by the opposing fan members disposed back to back, thereby increasing the high-speed strength. Further, both the fan 3A and the fan 3B are arranged such that the first blade 312 is shifted rearward in the rotational direction with respect to the second blade 322, so that the second pressure surface portion of the first blade 312 on the bracket 5 side has a second pressure surface portion. Therefore, the fan wind pressure of the first fan member 31 is improved and the ability as a fan is improved. For this reason, the air volume increases and the cooling performance of the rectifier and the like is further improved.

Embodiment 2. FIG.
FIG. 4 is a perspective view showing the rotor of the rotating electrical machine according to the second embodiment of the present invention. In the second embodiment, the positional relationship between the rotation direction of the first blade 312 and the second blade 322 in both the fan 3A and the fan 3B is opposite to that in the first embodiment. The blade 322 is arranged so as to be shifted forward in the rotational direction, and the other configuration is the same as that of the first embodiment, and thus the description thereof is omitted.

  In the second embodiment configured as described above, the second blade 322 on the rotor 2 side is on the rear side in the rotational direction with respect to the first blade 312 on the counter rotor side. Since the main plate portion 311 of the first fan member 31 is formed on the positive pressure surface portion, the fan wind pressure of the second fan member 32 is improved and the ability as the fan 3 is improved. For this reason, the amount of air flow to the field coil 22 is increased, and the cooling performance of the field coil 22 by the flow and stirring of the air passing through the rotor 2 is improved. Further, the first blade 312 on the counter-rotor side contributes to the cooling performance of the stator 4 positioned on the discharge side and the cooling performance of the rectifier 52 positioned on the fan intake side and a voltage regulator (not shown). To do. Moreover, since the blade area is expanded by combining the first and second fan members 31 and 32 as in the first embodiment, the cooling performance is improved and each fan member is inexpensively pressed. The effects similar to those of the first embodiment can be obtained, such as being able to manufacture the rotating electrical machine at low cost.

Embodiment 3 FIG.
FIG. 5 is a perspective view showing a rotor of a rotating electrical machine according to Embodiment 3 of the present invention. In the third embodiment, as shown in FIG. 5, the first blade 312 on the counter-rotor side is further moved forward in the rotational direction as compared with the second embodiment, and a valley portion between the magnetic poles of the field core 21 is obtained. 21 a is closed in the axial direction by main plate portions 311 and 321 of the first and second fan members 31 and 32. The rear side is also closed in the same manner as the front side.

  In the third embodiment configured as described above, the first and second main plate portions 311 and 321 are configured to block the valley portion 21a between the magnetic poles of the field core 21 so that the rotor 2 Since the axial ventilation can be blocked, there is a noise reduction effect. Also in this case, since the air in the rotor 2 can be agitated by the second blade 322 entering the valley 21a, the cooling of the field coil 22 is not greatly deteriorated. In addition, since the main plate portion 31 in front of the first blade 312 of the first fan member 31 does not have a valley portion that communicates in the axial direction, the fan wind pressure of the first fan member 31 is improved and the capability as the fan 3 is improved. Will improve. That is, an effect is obtained that the air volume is increased and the cooling performance on the counter-rotor side (bracket 5 side) is improved.

Embodiment 4 FIG.
FIG. 6 is a perspective view showing a rotor of a rotating electrical machine according to Embodiment 4 of the present invention. In the fourth embodiment, as shown in FIG. 6, the valley 21a between the magnetic poles of the field iron core 21 is closed by the first main plate 311 of the first fan member 31 on both the front side and the rear side. One fan member 31 is fixed to the rotor 2. The first blade 312 is disposed so as to be shifted forward in the rotational direction from the second blade 322. Other configurations are the same as those of the third embodiment.
By adopting the configuration as in the fourth embodiment, the axial ventilation of the rotor 2 can be blocked as in the third embodiment, and a noise reduction effect can be obtained. Also in this case, since the air in the rotor portion can be agitated by the second blade 322, the cooling of the field coil 22 is not greatly deteriorated. In addition, since the first main plate portion 31 in front of the first blade 312 does not have a valley or the like communicating with the axial direction, the fan wind pressure of the first fan member 31 is improved and the capability as a fan is improved. That is, the effect that air volume increases and the cooling property by the side of a bracket improves is acquired. The member that closes the valley portion 21a may be the second main plate portion 321.

Embodiment 5 FIG.
FIG. 7 is a perspective view showing a rotor of a rotating electrical machine according to Embodiment 5 of the present invention. In the fifth embodiment, as shown in FIG. 7, the first blade 312 of the first fan member 31 and the second blade 322 of the second fan member 32 formed in plane symmetry with each other are the same in the rotation direction. It is configured to match in position. The rear fan 3B is configured in the same manner as the front fan 3A.
In the fifth embodiment configured as described above, the first fan member 31 and the second fan member 32 formed symmetrically with respect to the plane are connected in the rotational direction of the first blade 312 and the second blade 322. Since the positions are matched and overlapped back to back, the pressure surface with respect to the blade is matched, the blade area can be continuously expanded, and the cooling performance is remarkably improved. In addition, since the main plate portions of the first blade 312 and the second blade 322 that are the sources of centrifugal force are overlapped with each other, the moment due to the centrifugal force completely cancels out, so that the high-speed strength is further increased. Is obtained.

Embodiment 6 FIG.
FIG. 8 is a perspective view showing a rotor of a rotating electrical machine according to Embodiment 6 of the present invention. In the sixth embodiment, as shown in FIG. 8, the front fan 3A has the same rotation direction as the first blade 312 of the first fan member 31 and the second blade 322 of the second fan member 32. The pressure surface of the first blade 312 forms a curved surface so that the protruding end portion on the radially outer side smoothly inclines forward in the rotational direction, and the second blade 322 protrudes on the radially inner side. A three-dimensional curved surface is formed so that the end portion smoothly inclines backward in the rotation direction. The rear fan 3B is matched at the same position in the rotation direction except that the first and second blades 312 are bent differently. The other configuration is the same as that of the fifth embodiment shown in FIG.

  In the sixth embodiment configured as described above, the first and second blades 312 and 322 are formed in a continuous shape so that the area of the blade is 2 and the first blade 312 and the second blade 322 are 2 in number. Since it has expanded by the amount corresponding to the combined area, the cooling air can be effectively sent to the portion that needs to be cooled, and the cooling performance is further improved. In addition, since the positive pressure surface is smooth, wind noise generated from the blade can be reduced, and noise from the rotating electrical machine can be reduced.

Embodiment 7. FIG.
FIG. 9 is a perspective view showing a rotor of a rotating electrical machine according to Embodiment 7 of the present invention. In the seventh embodiment, as shown in FIG. 9, the first blade 312 of the first fan member 31 is cut and raised from the front in the rotation direction indicated by the arrow C of the first main plate portion 311, so that the second fan member The 32 second blades 322 are cut and raised from the rear in the rotation direction indicated by the arrow C of the second main plate portion 321. The first blade 312 of the first fan member 31 is superposed with a position shifted so that the second blade 322 of the second fan member 32 is behind the rotational direction. The same applies to the rear side.
According to the seventh embodiment, as described above, the two thin plate-like fan members are configured by superimposing the respective blades against each other, thereby increasing the blade area and improving the cooling performance. Since the positive pressure portion of the first blade 312 has a space that communicates with the valley portion 21a, the axial ventilation of the rotor 2 increases, and the cooling performance of the field coil 22 is improved.

Embodiment 8 FIG.
FIG. 10 is a perspective view showing a rotor of a rotary electric machine according to Embodiment 8 of the present invention. In the eighth embodiment, as shown in FIG. 10, the first blade 312 of the first fan member 31 is cut and raised from the front in the rotational direction indicated by the arrow C of the first main plate portion 311. The 32 second blades 322 are cut and raised from the rear in the rotation direction indicated by the arrow C of the second main plate portion 321. The first and second fan members 31 and 32 are overlapped so that the first blade 312 is in front of the second blade 322 in the rotational direction.

  When noise due to axial ventilation of the rotor becomes a problem, the first blade 312 has two first and second fan members as compared to the second blade 322 as in the eighth embodiment. By overlapping, the space leading to the valley portion 21a can be arbitrarily adjusted by the first and second main plate portions 311 and 322, and the ventilation through the valley portion 21a of the field core 21 can be adjusted. There is a noise reduction effect. Also in this case, since the air can be agitated by the second blade 322, the cooling of the field coil 22 is not greatly deteriorated. In addition, since the first main plate portion 311 in front of the first blade 312 does not have a portion that communicates with the valley portion 21a, the fan wind pressure of the first fan member 31 is improved and the ability as the fan 3 is improved. That is, the effect that air volume increases and cooling property improves is acquired.

Embodiment 9 FIG.
FIG. 11 is a perspective view showing a rotor of a rotary electric machine according to Embodiment 9 of the present invention. In the ninth embodiment, the first blade 312 of the first fan member 31 is cut and raised from the front of the first main plate portion 311 in the rotational direction, and the second blade 322 of the second fan member 32 is The main plate part 321 is cut from the rear in the rotation direction, and the positions of the first blade 312 and the second blade 322 in the rotation direction are matched.
In the ninth embodiment, in addition to the effects of the eighth embodiment, the first and second blades 312 and 322 serving as the sources of centrifugal force are overlapped with each other, so that the main plate portions 311 and 321 are overlapped. Since moments due to centrifugal force completely cancel each other, there is an advantage that the high-speed strength is further increased. Further, the first and second main plate portions 311 and 321 block the trough portion 21a between the magnetic poles of the field iron core 21, thereby blocking the axial ventilation of the rotor 2 and Similarly, there is an advantage that noise can be reduced.

Embodiment 10 FIG.
12 and 13 show a rotary electric machine according to Embodiment 10 of the present invention. FIG. 12 is a side sectional view, and FIG. 13 is a perspective view showing the rotor shown in FIG. In the tenth embodiment, as shown in the drawing, in the fan 3A attached to the end surface of the front side field core 21A to which the pulley 23 of the rotor 2 is attached, the outer diameter of the first fan member 31 during rotation is the second. The fan member 32 is configured to be smaller than the outer diameter.
As a result, the cooling effect of the field coil 22 by the second blade 322 on the rotor 2 side and the cooling effect of the stator 4, the rectifier 52 and the voltage regulator by the first blade 312 on the counter-rotor side are individually obtained. I can control it. Although the outer diameter of the first fan member 31 on the pulley 23 side is reduced in the drawing, the outer shape of the second fan member 32 on the end surface of the rotor 2 on the slip ring 24 side may be reduced. Further, the fan 3B may be changed, or the ratio of the outer diameters of the first fan member 31 and the second fan member 32 may be individually set for both the fans 3A and 3B. Thus, by adjusting the outer diameters of the first fan member 31 and the second fan member 32 individually, the air flow of the rotating electrical machine can be finely adjusted, and the optimum state of the rotating electrical machine can be realized. . Note that changing the radius of the first or second blades 312 and 322 when rotating is a structural point, and the radii of the first main plate portion 311 and the second main plate portion 321 may be the same.

Embodiment 11 FIG.
14 and 15 show a rotor of a rotary electric machine according to Embodiment 11 of the present invention, FIG. 14 is a perspective view, and FIG. 15 is a perspective view showing a modification thereof. In the example shown in FIG. 14, the first and second fan members 31 and 32 are aligned in the rotational direction of the first and second blades 312 and 322, and the axial end of the second blade 322 is rotated in the rotational direction. It is inclined with respect to the direction of the rotary shaft 1 so as to be bent backward. Further, in the modification of FIG. 15, the end of the first blade 312 in the axial direction is bent forward in the rotational direction, and the surfaces of the first and second blades 312 and 322 are substantially flat with respect to the direction of the rotational shaft 1. It is tilted. Note that the surface is inclined with respect to at least one of a direction parallel to the rotating shaft 1 and a radial direction including the axis of the rotating shaft 1, that is, three-dimensionally inclined. Is.

  In the eleventh embodiment configured as described above, the surface formed by the first and second blades 312 and 322 is three-dimensionally inclined to adjust the flow rate of the axial component. The effect that the ventilation to the field coil 22 can be controlled, the field coil 22 can be efficiently cooled, and the wind noise can be reduced.

Embodiment 12 FIG.
FIG. 16 is a perspective view showing a rotor of a rotary electric machine according to Embodiment 12 of the present invention. In the twelfth embodiment, the ring-shaped side plate 313 is provided so as to connect the tips 312a of the plurality of first blades 312 protruding in the axial direction to the first fan member 31 in the circumferential direction. Thereby, the vibration of the first blade 312 at high speed can be suppressed, and the high speed strength of the fan 3 can be improved. Further, since the second fan member 32 is provided, the axial ventilation through the valley portion 21a is increased more than that of the first fan member 31 with the ring-shaped side plate 313 alone, and the field coil is increased. The cooling effect of 22 is improved.

Embodiment 13 FIG.
In the first to twelfth embodiments, the example in which the first fan member 31 and the second fan member 32 have the same number of blades has been described. However, in the thirteenth embodiment of the present invention, the first fan member 31 The number of blades of the second fan member is different from each other (not shown). In the present invention, since the second fan member is in the valley portion 21a between the magnetic poles of the field iron core 21, it is not very effective to increase the number of blades beyond the number of magnetic poles. However, since the first fan member is not restricted like the second fan member, the number of blades can be increased more than the second fan member in order to improve the cooling performance of the rotating electrical machine. In general, when the number of magnetic poles of the rotor is equal to the number of blades of the fan, there is a problem that noise increases due to resonance between the magnetic poles and the blades of the fan.

  The thirteenth embodiment has been made from the above viewpoint, wherein the number of blades of the first fan member is made larger than the number of blades of the second fan member, and the number of blades is thus different. As a result, the cooling effect of the field coil by the second blade on the rotor 2 side, the cooling effect of the stator 4 and the rectifier 52 by the first blade on the counter-rotor side, and the noise by the fan are individually obtained. Control can be performed, and the cooling performance of the rotating electrical machine can be further improved. Further, the noise of the rotating electrical machine can be reduced by appropriately changing the number of the first blades of the first fan member.

  In each of the embodiments described above, the first and second blades 312 and 322 of the fan 3 are illustrated as being equally spaced in the rotational direction. However, the present invention is not limited thereto. Alternatively, the interval in the rotation direction may be changed as appropriate. In addition, the first fan member 31 and the second fan member 32 of various aspects exemplified in the first to thirteenth embodiments are the actual shape of the rotating electrical machine, the arrangement of the rectifier 52, the usage environment, and the like. Depending on the situation, they can be arbitrarily selected and used in combination, and it is easy to optimize the cooling air flow. Further, the size and shape of the fan member (blade shape) may be changed between the front side (pulley side) fan 3A and the rear side (slip ring side) fan 3B. By the way, in the said embodiment, although the case where this invention was used as an alternating current generator motor or alternating current generator for vehicles was demonstrated, it cannot be overemphasized that a use and the form of a rotary electric machine are not limited above.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing a main part structure of a vehicle AC generator motor as a rotating electrical machine according to Embodiment 1 of the present invention. The perspective view which shows the rotor shown by FIG. The perspective view which shows the fan for cooling shown by FIG. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 2 of this invention. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 3 of this invention. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 4 of this invention. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 5 of this invention. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 6 of this invention. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 7 of this invention. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 8 of this invention. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 9 of this invention. FIG. 16 is a side sectional view showing a rotor of a rotating electrical machine according to a tenth embodiment of the present invention. The perspective view which shows the rotor shown by FIG. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 11 of this invention. The perspective view which shows the rotor which becomes a modification of FIG. The perspective view which shows the rotor of the rotary electric machine which concerns on Embodiment 12 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Rotating shaft, 2 Rotor, 21 Field iron core, 21a Valley part, 22 Field coil, 23 Pulley, 24 Slip ring, 3 Fan, 3A fan (front side), 3B fan (rear side), 31 1st Fan member, 311 first main plate portion, 312 first blade, 313 ring side plate, 32 second fan member, 321 second main plate portion, 322 second blade, 4 stator, 41 stator coil , 5 bracket, 5A front bracket, 5B rear bracket, 51 brush, 52 rectifier, 53 control circuit, 10 rotating electrical machine.

Claims (15)

  In a rotating electrical machine provided with a cooling fan made of a metal plate that rotates with a rotor, the fan is a plurality of parts that are cut and raised in one side direction of the rotor from a first main plate portion extending in a radial direction. A first fan member having the first blade and a plurality of second blades cut and raised in the other direction of the rotor from the second main plate portion superposed on the first fan member A rotating electric machine comprising: a second fan member having:   The first blade and the second blade are both cut and raised from the front side in the rotational direction of the respective main plate portions, and the first and second sets of blades adjacent to each other in the circumferential direction are the above-described one set. The rotating electrical machine according to claim 1, wherein the first blade is disposed rearward in the rotational direction with respect to the second blade.   The first blade and the second blade are both cut and raised from the front side in the rotational direction of the respective main plate portions, and the first and second sets of blades adjacent to each other in the circumferential direction are the above-described one set. The rotating electrical machine according to claim 1, wherein the first blade is disposed forward of the second blade in the rotational direction.   The rotor has a field core in which valleys are formed between a plurality of magnetic poles, and the valleys are closed in the axial direction by at least one of the first main plate part and the second main plate part. The rotating electrical machine according to any one of claims 1 to 3, wherein the rotating electrical machine is provided.   2. The first blade and the second blade are aligned in the rotational direction, and each blade is cut and raised from the front side in the rotational direction of each main plate portion. The rotating electrical machine described.   The first blade is cut and raised from the front side in the rotation direction of the first main plate portion, and the second blade is cut and raised from the rear side in the rotation direction of the second main plate portion. 2. The rotation according to claim 1, wherein the first blade and the second set of blades close to each other are disposed rearward in the rotational direction with respect to the second blade. Electric.   The first blade is cut and raised from the front side in the rotation direction of the first main plate portion, and the second blade is cut and raised from the rear side in the rotation direction of the second main plate portion. 2. The rotation according to claim 1, wherein the first blade and the second set of blades adjacent to each other are disposed in front of the second blade in the rotational direction. Electric.   The first blade is cut and raised from the front side in the rotational direction of the first main plate portion, and the second blade is cut and raised from the rear side in the rotational direction of the second main plate portion. 2. The rotating electrical machine according to claim 1, wherein the first blade and the second blade are aligned in the rotational direction.   The first blade of the first fan member and the second blade of the second fan member have different outer diameters during rotation. Rotating electric machine.   The rotating electrical machine according to any one of claims 1 to 9, wherein a ring-shaped side plate is provided at an axial tip of the first blade.   11. The rotating electrical machine according to claim 1, wherein the first blade and the second blade have different numbers in the circumferential direction.   The first blade or the second blade is formed in a planar shape substantially parallel to the direction of the rotation axis of the rotor and substantially along the radial direction including the axis of the rotation shaft. The rotating electrical machine according to any one of claims 1 to 11.   The first blade or the second blade has a flat surface, and the surface is in at least one of a direction parallel to the rotation axis of the rotor and a radial direction including the axis of the rotation shaft. The rotating electrical machine according to any one of claims 1 to 11, wherein the rotating electrical machine is inclined with respect to the rotating electrical machine.   The rotating electrical machine according to any one of claims 1 to 11, wherein surfaces of the first blade and the second blade form a curved surface.   The rotating electrical machine according to any one of claims 1 to 14, wherein the fans are respectively disposed at both ends in the axial direction of a field core constituting the rotor.

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