KR19980014072A - Automotive rotary electric apparatus - Google Patents

Abstract

The present invention is characterized in that the winding ends of the coils 91a, 91b, 91c, 92a, 92b, 92c of the first three-phase stator coil group 91 and the second three- And the high frequency components of the magnetomotive force generated in the first and second stator coil groups are connected to each other so that the phases of the excitation coils generated in the two stator coil groups are in phase and opposite to each other. That is, the respective coils 91a, 91b and 91c of the first three-phase stator coil group 91 and the corresponding coils of the coils 92a, 92b and 92c of the second three-phase stator coil group 92 92a, 92b, 92c are connected to each other. The connection coils of the first and second three-phase stator coil groups constitute a stator coil 9 connected to the three-phase terminal, and are connected to the three-phase rectifier unit 30.

Description

Automotive rotary electric apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric machine for a vehicle, such as an alternator for supplying electric power to a vehicle-mounted electric device and charging a vehicle-mounted battery, and more particularly to a winding structure of a stator coil in an automotive alternator.

As the vehicle load increases and the mounting space of the auxiliary device decreases, it is further demanded to achieve high output and maneuverability of the automotive alternator. From this point of view, Japanese Patent Laid-Open No. 6-165422 discloses a vehicular alternator intended to suppress temperature rise and magnetic noise of a stator coil caused by high output of an automotive alternator.

The stator structure of the alternator includes a stator core having six teeth per two pole pitches of the rotor and a stator coil wound around a plurality of teeth of the stator core.

8, the stator coil is divided into a first three-phase stator coil group 91 having a short pitch winding type of 2? / 3 and a first? Three-phase stator coil group 91 having? / 3 and a second three-phase stator coil group 92 of a short pitch winding type of 2? / 3 that is moved in the winding direction by an electrical angle of the rad.

The first three-phase stator coil group 91 is composed of three first stator windings 91a, 91b and 91c and the second three-phase stator coil group 92 is composed of three second stator windings 92a , 92b and 92c. By using the stator coil having the winding structure as described above, the winding length of the stator coil can be shortened, thereby suppressing the heat generation amount of the alternator, and the high frequency component included in the reaction magnetism generated in the operation of the alternator can be canceled So that the magnetic noise can be suppressed.

8, the conventional alternator includes a three-phase rectifier circuit 101 for rectifying the first three-phase stator coil group 91 and the second three-phase stator coil group 92, respectively, , ≪ / RTI > 102). As a result, there is a problem that the number of parts increases and the production cost rises.

1 is an electrical circuit diagram showing a connection between a stator coil and a three-phase rectifier circuit of a rectifier according to a first embodiment of the present invention,

FIG. 2 is a cross-sectional view showing a general structure of a conventional generator for a vehicle according to the present invention,

3 is a front view showing a main part of the stator according to the first embodiment of the present invention,

4 is an explanatory view of a winding structure of a stator coil according to a preferred embodiment of the present invention,

5 is an electric circuit diagram showing a connection between a stator coil and a three-phase rectifier circuit of a rectifier according to a second embodiment of the present invention,

6 is an electric circuit diagram showing a connection between the stator coil and the three-phase rectifier circuit of the rectifier according to the third embodiment of the present invention,

FIG. 7 is an electrical circuit diagram showing a connection between a stator coil and a three-phase rectifier circuit of a rectifier according to a fourth embodiment of the present invention,

8 is an electrical circuit diagram showing a connection between a stator coil and a three-phase rectifier circuit of a rectifier according to the prior art.

DESCRIPTION OF THE REFERENCE NUMERALS

1: Alternator (rotating electrical machine) 4: Rectifier

5: rotor 6: stator

7: stator core 9: stator coil

30: three-phase rectifier circuit (electronic circuit) 31: rotating shaft (axis)

91: first three-phase stator coil group 92: second three-phase stator coil group

91a, 91b, 91c: first stator windings 91a, 92b, 92c: second stator windings

Accordingly, the present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a stator of a first and second three-phase stator coil group, So that it is possible to reduce the size of the vehicle. The rotating electrical machine includes a rotor having a plurality of magnetic poles adapted to rotate integrally with an output terminal rotary shaft of a three-phase stator. The stator core has six teeth per pitch of two magnetic poles of the rotor. A first three-phase stator coil group having a plurality of coils wound around at a short pitch of 2 pi / 3 electrical angle, and a plurality of first three-phase stator coil groups wound around the teeth of the stator core at a short pitch of 2 pi / 3 electrical angle And a second three-phase stator coil group having a coil and arranged to be shifted by? / 3 electrical angle with respect to the first three-phase stator coil group.

As a result, the coils of the first three-phase stator coil group and the coils of the first three-phase stator coil group are arranged such that the high-frequency components of the repulsive magnetomotive force in the two stator coil groups are generated in opposite phases, Phase stator coil group are connected to each other, and the first and second three-phase stator coil groups constitute a stator coil connected to the three-phase terminal.

The respective coils of the first three-phase stator coil group and the corresponding coils of the second three-phase stator coil group are connected in parallel to each other. The first three-phase stator coil group and the second three-phase stator coil group and the parallel circuit each can form a Y-winding winding or form a? -Wiring winding, respectively.

The coils of the first three-phase stator coil group and the corresponding coils of the second three-phase stator coil group may be connected in series with each other. And each series circuit of the first three-phase high-tension stator coil group and the second three-phase stator coil group can form a Y-wiring winding or a? Wiring winding.

In operation of the rotary electric machine, when the current flow of the stator coil and the rotor is rotated together with the rotary shaft, the high frequency components of the repulsive magnetomotive force are generated in the first three-phase stator coil group and the second three-phase stator coil group . Here, the phases of the high-frequency components of the reaction magnetism generated in the second three-phase stator coil group are the same as the phases of the high-frequency components of the magnetomotive force generated in the first three-phase stator coil group It is the opposite. Therefore, the high-frequency components included in the repulsive electromotive force can be canceled each other, thereby suppressing magnetic noise during operation of the rotating electrical machine.

Also, the first and second three-phase stator coil groups are short pitch winding systems of 2? / 3. Thus, when compared to a stator coil of a full-pitch winding type with respect to the pitch of the rotor, the winding length of the stator coil in the present invention can be shortened and the winding length of each winding of the first and second three- The overlap area can be reduced, thereby increasing the contact area of the cooling airflow generated in the rotating electrical apparatus having the stator file group. As a result, the temperature rise of each of the first and second three-phase stator coil groups can be suppressed, and the number of components and the production cost can be reduced. In addition, since the magnetic noise generated in the operation of the rotary electric machine can be reduced, the noise reduction in the rotary electric machine can be improved.

In addition, since the temperature rise of the stator coil can be suppressed, high efficiency of the rotating electrical machine can be achieved.

Other objects, features and characteristics of the present invention as well as the function of the related parts of the present invention will become apparent from consideration of the following detailed description, appended claims and drawings.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, a first embodiment of the present invention will be described with reference to Figs. 1 to 4. Fig.

The vehicle alternator 1 is an alternator for charging a vehicle-mounted battery and supplying electric power to an electric device (i.e., an electric load) mounted on the vehicle. The alternator 1 generally includes a driving frame 2 forming an outer peripheral wall of the alternator 1, a rear frame 3 connected to a rear end of the driving frame 2, A rotator 5 rotatably supported on the frames 2 and 3 and a stator 6 fixed on the inner surface of the driving frame 2. The rectifier unit 4 includes a frame 4,

[External frame structure of alternator 1]

The driving frame 2 and the rear frame 3 support the rotor 5 and the stator 6 and also serve to mount the alternator to the engine. The driving frame 2 is made of aluminum by die casting, and the stator 6 is fixed to the inner surface of the driving frame 2 by press-fitting or the like. The rear frame 3 is also formed of aluminum by die casting and is directly connected to the rear end of the club head frame 2 by fastening means such as a plurality of stud bolts 11 and a nut 12. [ The rotor 5 is rotatably supported on the inner periphery of the drive frame 2 and the rear end frame 3 via bearings 13,

The driving frame 2 and the rear frame 3 are provided with a plurality of air intake openings 15 for drawing a cooling airflow into the frames 2 and 3 and discharging the cooler to the outside of the frames 2 and 3 A plurality of exhaust ports 16 and 17 are formed. A rear end cover 18 for covering and wrapping the rear end frame 3 is connected to the rear end of the rear end frame 3. The rear cover 18 is provided with a plurality of air inlets 19 for drawing a cooler to the rear cover 18 and a ventilation hole 20 for passing the cooler through the cooler to adapt to the rectifier 4, .

The brush holder 21, the voltage regulator 22, the rectifier 4 and the like are provided between the rear end frame 3 and the rear end cover 18. The brush holder (21) serves to receive and support the two brushes (23). The voltage regulator 22 is operative to turn on and off a switching device such as a transistor provided between the ground and a field coil 34 to be described later to thereby control the exciting current to control the alternator 1 It is an IC regulator that adjusts the output voltage constantly.

[Structure of Rectifier (4)

The rectifier (4) is electrically connected to a battery and an electric load mounted on the vehicle to charge the battery and supply electric power to the electric load. The rectifier (4) is provided with a three-phase full-wave rectifying circuit (30) for converting an alternating current into a direct current. The three-phase full-wave rectifying circuit 30 constitutes an electric circuit in the present invention, and includes three positive-side sialic diodes (anode-side semiconductor rectifying elements) respectively fixed to three recesses formed in the anode- And three negative electrode side silicon diodes (negative electrode side semiconductor rectifying elements) respectively fixed to three recesses formed in the negative electrode side cooling fins 25.

The three-phase full-wave rectifying circuit 30 is electrically connected to the AC output terminal 26 at its input side to detect the AC output generated at the stator coil 9 of the stator 6, And is electrically connected to the DC output terminal 27 at the same time. The positive side cooling pin 24 and the negative side cooling pin 25 are connected to a terminal base 28 made of an electrically insulating resin molded so as to include AC output terminals 26a, 26b and 26c and other connection terminals And fastened to the rear end frame 3 by fastening elements 29 such as bolts and nuts. And the negative electrode side cooling fins 25 are in contact with the rear cover 18 on the ground side of the main body.

[Structure of Rotor (5)] [

The rotor 5 serves as a magnetic field system and is integrally rotated together with the shaft 31 which is a rotary shaft. The rotor 5 is generally composed of magnetic poles 32 and 33, a magnetic field coil 34 and two slip rings 35. A v-groove pulley 36 for transmitting engine torque to the shaft 31 is mounted on the front end of the shaft 31. [ The v-groove pulley 36 is connected to the output shaft of the engine via connecting means such as a belt.

The coil bobbin 37 is mounted at the center of the magnetic poles 32 and 33 and the magnetic field coil 34 is wound around the coil bobbin 37. When the excitation current flows in the magnetic field coil 34, A magnetic field is generated. That is, all the protrusions of the magnetic poles 32 are N poles, and all protrusions of the poles 33 are S poles. A cooling fan 38 for sucking the cooler into the driving frame 2 is integrally mounted on one end face of the magnetic pole 32 and a cooling fan 39 for sucking the cooler into the rear end frame 3, (33).

The cooling fan 38 is an axial fan for generating a cooling air flow in the axial direction and the radial direction (centrifugal direction) of the shaft 31, while the cooling fan 39 is a fan for generating a cooling air flow in the radial direction ). ≪ / RTI >

Two slip rings 35 are mounted on the rear end of the shaft 31 and two brushes 23 slide on the outer periphery of the two slip rings 35, respectively.

[Structure of Stator (6)

Hereinafter, the structure of the stator 6 will be described in detail with reference to Figs. 1 to 4. Fig.

The stator 6 generally includes a stator core 7 facing the outer periphery of the magnetic poles 32 and 33 and a stator core 7 disposed on the inner periphery of the stator core 7 to induce three- And a stator coil 9 wound around a plurality of teeth formed.

The stator core 7 is integrally formed with the drive frame 2 and the rear end frame 3 by press fitting into the inner periphery of the drive frame 2 and the rear end frame 3. Therefore, the heat generated in the stator 6 is transmitted to the driving frame 2 and the rear frame 3, thereby improving the cooling efficiency. The stator core 7 is formed by laminating a plurality of thin plates formed of a magnetic material. The stator core 7 is a magnetic flux path formed so that magnetic fluxes generated from magnetic poles 32 and 33 of the rotor 5 effectively cross the first and second three-phase stator coil groups 91 and 92, . 3, a plurality of ties located at equal intervals are arranged in the stator core 7 in such a manner that six teeth are positioned for two magnetic pole pitches of the magnetic poles 32 and 33 of the rotor 5, As shown in Fig.

The stator coil 9 includes first and second three-phase stator coil groups 91 and 92, which are short pitch winding systems of 2? / 3, in which the coils are wound around the plurality of teeth with a short pitch of 2? / 3. ). The second three-phase stator coil group 92 is provided radially inside the first three-phase stator coil group 91.

The first three-phase stator coil group 91 is composed of three stator windings (or armature windings) 91a, 91b and 91c.

As shown in Fig. 4, the first stator winding 91a is wound around two adjacent tiers 7a and 7b, and then is wound around four adjacent teeth 7c, 7d continuous to the teeth 7b , 7e and 7f are wrapped around the two adjacent tiers 7g and 7h.

As shown in Fig. 4, the first stator winding 91b is wound around two adjacent tiers 7c and 7d and then wound on four adjacent tiers 7e and 7f continuous to the teeth 7d , 7g, and 7h) are wrapped around the two adjacent tiers (7i, 7j).

As shown in Fig. 4, the first stator winding 91c is wound around two adjacent tiers 7e and 7f, and then wound on four adjacent teeth 7g, 7hJ 7i and 7j are wrapped around the two adjoining teeth 7k and 71 which have skipped. The winding pattern is continuously repeated so that sets of three first stator windings 91a to 91c wound around a plurality of teeth of the stator core 7 are repeatedly obtained.

On the other hand, the second three-phase stator coil group 92 is composed of three second stator windings (or armature windings) 92a, 92b and 92c.

As shown in Fig. 4, the second stator winding 92a is shifted and mounted on the first stator winding 91a by an electrical angle of? / 3 radians, that is, one tooth, in the winding direction.

The second stator winding 92a is wound around two adjacent tiers 7b and 7c and then wound around two adjacent tiers 7d to 7g that continue to the teeth 7c, And is wound around the teeth 7h and 7i.

Likewise, the other second stator windings 92b and 92c are respectively moved and mounted on the first stator windings 91b and 91c by electrical angles of π / 3 radians, ie, one tooth, in the respective winding directions. The second stator windings 92a to 92c are continuously and repeatedly wound around a plurality of teeth of the stator core 7 in a predetermined winding pattern similar to the winding pattern of the first stator windings 91a to 9lc All.

[Wiring Structure of Stator Coil]

Hereinafter, the wiring structure between the three-phase rectifier circuit 30 and the stator coil 9 of the rectifier 4 in this embodiment will be described in detail with reference to Fig.

The three first stator windings 91a to 91c are connected to each other by Y-connection to form a first three-phase stator coil group 91. [ The winding ends of the first stator windings 91a to 9lc are connected to the three-phase rectifier circuit 30 of the rectifier 4 through the AC output detecting terminal 26. [ Similarly, the three second stator windings 92a to 92c are connected to each other by Y-connection to form a second three-phase stator coil group 92. [

The winding ends of the first three-phase stator coil group 91 and the three-phase stator coil group 92 are connected to the first and second three-phase stator coil groups 91 and 92, Are connected so that the eigenfrequency components are in opposite phase to each other. That is, the winding end of the first stator winding 91a is connected to the winding end of the second stator winding 92b. The winding end of the first stator winding 91b is connected to the winding end of the second stator winding 92c. The winding end of the first fixed end winding 91c is connected to the winding end of the second stator winding 92a. The winding ends of the first and second stator coil groups 91 and 92 are connected to the three-phase rectifier circuit 30 of the rectifier 4 through three AC output detection terminals 26a to 26c. The presence or absence of the connection between the neutral point of the first three-phase stator coil group 91 and the neutral point of the second three-phase stator coil group 92 is not different in terms of operation and effect.

[Operation of First Embodiment]

Hereinafter, the operation of the alternator 1 having the winding structure of the stator coil 9 described above will be briefly described with reference to Figs. 1 to 4. Fig.

When the engine torque is transmitted to the V-groove pulley 36 through the belt, the rotor 5 or the shaft 31 is rotated. An external voltage is applied to the magnetic field coil 34 to allow the excitation current to flow in the magnetic field coil 34 thereby exciting the magnetic poles 32,33. Therefore, all protrusions of the magnetic poles 32 become N poles, and all protrusions of the magnetic poles 33 become S poles. Thereafter, a rotating magnetic field is generated around the stator core 7 of the stator 6 rotating relative to the rotor 5, whereby the first three-phase stator coil group 91 and the second The three-phase stator coil group 92 induces an alternating current. The three-phase alternating current is converted into a direct current by the rectifier 4 to charge the battery and supply electric power to the electric load mounted on the vehicle.

As the magnetic poles 32 and 33 rotate, the cooling fans 38 and 39 mounted on the front end faces of the magnetic poles 32 and 33 are similarly rotated. Thus, the rotation of the cooling fan 38 generates a cooling air flow from the intake port 15 to the exhaust port 16 in the drive frame 2. Further, the rotation of the cooling fan 39 generates a cooling air flow from the air inlet 19 and the air outlet 20 to the air outlet 16. Therefore, the heat generating member including the magnetic field coil 34, the rectifier 4, the first three-phase stator coil group 91 and the second three-phase stator coil group 92 is cooled by the cooling airflow.

[Effects of First Embodiment]

Compared to an alternator (conventional technology) that requires two rectifiers, the number of components can be reduced and the production cost of the alternator 1 is reduced. Therefore, the cost of the vehicle equipped with the inexpensive alternator can be reduced.

In addition, when the alternator 1 generates electric energy, the second and fourth high frequency components included in the repulsive electromotive force generated in the first and second three-phase stator coil groups 91 and 92 are canceled, Thereby reducing the magnetic noise generated in the operation of the generator 1, thereby achieving the noise reduction in the alternator 1.

Further, when compared with the stator coil of the full-pitch winding type with respect to the pole pitch of the rotor, the winding length of the stator coil in this embodiment can be shortened, and the length of each of the first and second three- The overlapping portions of the groups 91 and 92 are reduced so that the cooling airflow generated by the operation of the cooling shafts 38 and 39 increases the contact area with the stator coil groups 91 and 92. [ As a result, the amount of heat generated by the stator coils 9 can be reduced, and the temperature rise of the stator coils 9 is suppressed, thereby achieving high output of the alternator 1.

[Second Embodiment]

Hereinafter, a second embodiment of the present invention will be described with reference to FIG. 5 is an electric circuit diagram showing a connection between the stator coil and the three-phase rectifier circuit of the rectifier in the automotive generator according to the second embodiment.

The three first stator windings 91a, 91b and 91c are connected to each other so as to form a first three-phase stator coil group 91 by? -Wiring. The winding end of the first stator coil winding 91a is connected to the three-phase rectifier circuit 30 of the rectifier 4 through the AC output terminal 26. [ Likewise, the three second stator windings 92a, 92b, 92c are connected to each other to form a second three-phase stator coil group 92 by?

The winding ends of the first three-phase stator coil group 9l and the second three-phase stator coil group 92 are connected in series between the high-frequency component of the repulsive magnetomotive force generated in the first and second stator coil groups 91 and 92 Are in mutually opposite phases. That is, the winding end of the first stator winding 91a is connected to the winding end of the second stator winding 92b. The winding end of the first stator winding 91b is connected to the winding end of the second stator winding 92c. The winding end of the first stator winding 91c is connected to the winding end of the second stator winding 92a. The winding ends of the first and second three-phase stator coil groups 91 and 92 are connected to the three-phase rectifier circuit 30 of the rectifier 4 via three AC output detection terminals 26a, 26b and 26c, Lt; / RTI >

Further, in the case of the present embodiment in which the stator coil 9 has the winding of? -Connection, the generation of the high-frequency components causing the circulating current circulating in the first and second three-phase stator coil groups 91 and 92 is prevented There is a number. Therefore, the amount of heat generated by the first and second three-phase stator coil groups 91 and 92 can be reduced, and the temperature rise of the first and second three-phase stator coil groups 91 and 92 is suppressed.

[Third Embodiment]

6 is an electric circuit diagram showing a connection between a stator coil and a three-phase rectifier circuit of a rectifier in a vehicle alternator according to a third embodiment of the present invention.

In the case of the above embodiment, the first three-phase stator coil group 91 and the second three-phase stator coil group 92 are formed in the first and second three-phase stator coil groups 91 and 92 And the high-frequency components of the repulsive magnetomotive force are connected in series to each other so that the phases are opposite to each other. That is, the three second stator windings 92a, 92b, 92c are connected to each other by Y-connection to form a second three-phase stator coil group 92 and are connected to the first stator windings 91a, 91b, Is connected in series with one winding end of the second stator winding. That is, the second stator winding 92b is connected in series with one winding end of the first stator winding 91a, the second stator winding 92c is connected in series with the first stator winding 91b, The winding 92a is connected in series with the first stator winding 91c. The other winding ends of the first stator windings 91a to 91c are connected to the three-phase rectifier circuit 30 of the rectifier 4 through the three-phase AC output detection terminals 26a to 26c.

[Fourth Embodiment]

Fig. 7 is an electrical circuit diagram showing the connection between the stator coil and the three-phase rectifier circuit of the rectifier in the automotive alternator according to the fourth embodiment of the present invention.

In this embodiment, the first three-phase stator coil group 91 and the second three-phase stator coil group 92 have the same phase of the magnetomotive force generated in the two stator coil groups, Phase stator coil groups 91 and 92 are connected in series so that the high-frequency components of the repulsive magnetomotive force generated in the second three-phase stator coil groups 91 and 92 are opposite in phase to each other.

That is, one winding end of the first stator winding 91a and one winding end of the second stator winding 92b are connected in series and one winding end of the first stator winding 91b and the other end of the second stator winding 92c Are connected in series, and one winding end of the first stator winding 91c and one winding end of the second stator winding 92a are connected in series. The other winding end of the first stator winding 91a and the other winding end of the first stator winding 91c are connected to each other and the other winding end of the first stator winding 91b and the other winding of the second stator winding 92b And the other winding ends of the second stator winding 92a and the other winding ends of the second stator winding 92c are connected to each other to form? Wiring. The other winding ends of the first and second stator windings 91a to 91c and 92a to 92c are connected to the three-phase rectifier circuit 30 of the rectifier 4 through the three AC output detection terminals 26a to 26c.

[Example of change]

Although the present invention has been applied to an automotive alternator (automotive synchronous generator) in the above embodiment, the present invention can also be applied to a synchronous motor for a vehicle. In this case, the electronic circuit may be, for example, an inverter circuit that allows six MOSFETs to undergo PWM control to generate three-phase alternating current and allow current to flow in the first and second three-phase stator coil groups 91, to be. The present invention may also be applied to a rotary electric apparatus for a vehicle, such as a brushless generator for a vehicle or a brushless motor for a vehicle.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be clear to those who have knowledge.

According to the present invention configured as described above, the number of parts can be reduced, the production cost of the alternator is reduced, and the second and fourth high frequency components included in the reaction magnetomotive force generated in the first and second three- Components of the stator coils are canceled so that the magnetic noise can be reduced in the alternator and the winding length of the stator coils and the overlapping portions of the first and second three-phase stator coil groups are reduced, The amount of heat generated by the stator coils can be reduced and the temperature rise of the stator coils can be suppressed to achieve a high output of the alternator.

Claims (8)

A rotor 5 having a plurality of magnetic poles 32 adapted to rotate integrally with the rotary shaft of the three-phase output terminals 26a, 26b and 26c, a stator core 7 having six teeth per two magnetic pole pitches of the rotor ), A first three-phase stator coil group 91 having a plurality of coils 91a, 91b, and 9lc superimposed around the teeth of the stator core 7 at a short pitch electrical angle of 2? / 3, Phase stator coil group 91 with a plurality of coils 92a, 92b, and 92c superimposed around the teeth of the stator core at a short pitch electrical angle of 2? / 2, Phase stator coil groups 91a, 91b, and 91c of the first three-phase stator coil group and the first three-phase stator coil groups 92 disposed on the second three-phase stator coil group 92, The stator coil group corresponding coils (92a, 92b, 92c) are arranged such that the first and second three-phase stator coil groups (91, 92) The high frequency components of the magnetomotive force generated in the second three-phase stator coil groups 91 and 92 are connected so as to have opposite phases, and the first and second three-phase coil groups 91 and 92 are connected to the three- And constituting the stator coil (9) connected to the windings (26a, 26b, 27c). The stator of claim 1, wherein the coils (91a, 91b, 91c) of the first three-phase stator coil group (91) and the corresponding coils (92a, 92b, 92c ) Are connected in parallel with each other. 3. The motorcycle according to claim 2, wherein the parallel circuits (91a to 92b, 91b to 92c, 91c to 92a) of the first three-phase stator coil group 91 and the second three-phase stator coil group 92 are Y - forming a winding wire. 3. The motorcycle according to claim 2, wherein the parallel circuits (91a to 92b, 91b to 92c, 91c to 92a) of the first three-phase stator coil group 91 and the second three-phase stator coil group 92 are Y - forming a winding wire. The stator of claim 1, wherein each of the coils (91a, 91b, 91c) of the first three-phase stator coil group (91) and the corresponding coils (92a, 92b, 92c ) Are connected in series with each other. The stator according to claim 5, wherein each of the series circuits (91a to 92b, 91b to 92c.91c to 92a) of the first three-phase stator coil group (91) and the second three-phase stator coil group (92) - forming a winding wire. 6. The stator of claim 5, wherein each of the series circuits (91a to 92b, 91b to 92c, 91c to 92a) of the first three-phase stator coil group (91) - forming a winding winding. The rotating electrical machine for a vehicle according to claim 1, further comprising a three-phase full-wave rectifier (4) connected to the three-phase output terminals (26a, 26b, 26c).