JP2003199280A - Stator of rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance reliability by reducing electromagnetic vibration occurring in a winding conductor caused by current application, at the end of the stator winding of a rotating electric machine. <P>SOLUTION: This stator is constituted such that two pieces of circular phase rings for connecting a connecting conductor 6 leading to the winding conductor and a lead conductor 8 with each other are arranged along the circumferential direction at the end of the stator winding of the rotating electric machine, that the ends of connection with the connecting conductors 6 of the phase rings are opposed in the circumferential direction to each other, and that a shim block 14 is inserted between these connecting ends in opposition to allow the opposed parts to be fixed to it, and a connecting conductor 6b of one phase ring 7b is connected to the connecting end of one phase ring 7b, crossing the other phase ring 7a. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of a rotating electric machine in which a stator winding end portion of a large rotating electric machine such as a turbine generator is fixed so that vibration due to electromagnetic force can be reduced.

[0002]

2. Description of the Related Art In a rotary field type electric rotating machine represented by a turbine generator, a conductor of a stator winding is inserted into a slot of a stator iron core to form a straight portion. The part has a structure that protrudes into the space from the iron core slot.

This winding conductor is firmly fixed on the entire surface inside the iron core slot, but is exposed to the air at the winding end portion, so that it is less supported and has low rigidity. .

By the way, the winding conductor has a characteristic phenomenon that electromagnetic force is generated in the conductor itself by energizing the conductor, and the action of this electromagnetic force causes vibration in the conductor.
Therefore, it is necessary to provide various reinforcing structures at the winding end portions in order to give the conductor strong rigidity to reduce electromagnetic vibration generated in the conductor.

FIG. 13 is a sectional view showing the structure of the end portion of the stator winding of a rotary electric machine.

In FIG. 13, an upper coil conductor 1 of a stator winding conductor extends from an iron core end portion 2 along a cycloid curve, and a tip end portion 3 is reversely connected to a lower coil conductor 4. The lower coil conductor 4 is returned from the tip portion 3 to the iron core end portion 2 along the cycloid curve on the outer peripheral side of the upper coil conductor 1.

A connecting conductor 6 serving as a current outlet is arranged in the stator winding. The connecting conductor 6 is connected to the upper coil conductor 1 or the lower coil conductor 4 at the tip portion 3, and is connected to an arc-shaped phase ring 7 arranged along the outer peripheral portion of the lower coil conductor 4. The phase ring 7 is connected to the lead conductor 8, and in the case of a generator, the current generated in the stator winding is output from the lead conductor 8 to the outside.

Further, the upper coil conductor 1 and the lower coil conductor 4 are bound together by a glass roving 9 in order to oppose electromagnetic force, and are also bound to a bind ring 10 which is an annular reinforcing member. Further, a bind ring support 11 fixed to the pressing plate 5 at the end of the iron core is provided on the outer circumference of the lower coil conductor 4.

The bind ring support 11 supports the bind ring 10 and supports the entire winding end portion, but it is connected to the phase ring 7 at the outer peripheral portion by thread binding, and the bind ring support 11 of the phase ring 7 is provided. It also has a holding function.

As described above, the electromagnetic force acts on the conductor at the winding end due to the interaction of the magnetic field generated by the current flowing through the conductor. For this reason, since the force directly acts on the conductor due to the current flowing through the conductor, it is difficult to suppress the vibration by reducing the exciting force as in the normal vibration problem. There is a problem above.

Recently, for example, Japanese Patent Laid-Open Publication No.
It has been considered effective to suppress the vibration of the conductor by strengthening the coupling rigidity between the coil conductors and increasing the support rigidity of the conductor as shown in No. 1-299158.

According to this technique, as shown in FIG. 14, a material having electrical insulation and heat resistance in the middle of a large number of winding conductors 12 (upper coil conductor or lower coil conductor) extending from the iron core end 2. The vibration absorbing material 13 formed from is inserted in a compressed state. Since this vibration absorber is press-fitted, it has high rigidity and can firmly fix the winding conductors 12 to each other.

[0013]

In such a fixed structure of the winding conductors, the relative displacement between the winding conductors can be restrained, but the connecting conductors and the upper coil conductors and the lower coil conductors connected to the connecting conductors have a great effect. Can not be expected.

In general, the electromagnetic vibration of the winding conductor has a larger amplitude at the tip portion apart from the iron core end, which is a fixed point, than at the intermediate portion of the conductor. In particular, the amplitude at the tip of the winding conductor connected to the connecting conductor tends to be larger than that at the tip of the series conductor in which the upper coil conductor and the lower coil conductor are connected in series.

This phenomenon is caused by the vibration of the phase ring being transmitted to the connection conductor because the end of the phase ring is not restrained. The connection conductor is cantilevered with the end of the phase ring as a fulcrum. Since the beam is formed, the vibration at the end is amplified, and the vibration displacement at the end of the connecting conductor becomes significantly large.

Further, since the connecting conductor has a higher current density than the winding conductor, it has a thicker conductor cross section and is integrally formed. It is significantly higher than the rigidity of the conductor. For this reason, since a large load is applied to the connection portion with the winding conductor having low rigidity due to the vibration of the connection conductor, it is considered that the possibility of causing damage to the winding conductor is significantly higher than that of the series conductor.

FIG. 15 shows the result of electromagnetic vibration calculation by connecting the structural analysis by the finite element method and the electromagnetic force obtained by the electromagnetic analysis to the stator winding ends of the rotating electric machine.

According to FIG. 15, the following points are pointed out.

(1) Large amplitude at the tip 3 of the winding conductor (2) Large displacement of the tip of the connecting conductor 6 (6a, 6b) (3) Connection conductor pulled by displacement of the connecting conductor 6 The winding conductor connected to is greatly deformed. (4) The vibration of the connecting conductor 6 is caused by the phase ring 7 (7a, 7b).
(5) The vibration of the phase ring 7 is large at the connection point with the connection conductor 6. In the figure, 1 is the upper coil conductor and 4 is the lower coil conductor.

In particular, the two phase rings 7 located at the top
Since a and 7b have the longest distance from the lead conductor 8 which is a support point, the displacement at the end portion connected to the connection conductor 6 is large.

As described above, in the prior art aiming at increasing the coupling rigidity between the winding conductors, a sufficient reduction can be achieved in the electromagnetic vibration transmitted to the winding conductors via the connecting conductors due to the phase ring. The effect cannot be expected.

An object of the present invention is to strengthen the support rigidity of the phase ring and reduce its vibration, thereby suppressing the vibration of the connecting portion with the connecting conductor, which is a weak point of the winding conductor, and suppressing the stator winding end. An object of the present invention is to provide a stator of a rotating electric machine that can improve the reliability of the parts.

[0023]

In order to achieve the above object, the present invention constitutes a stator of a rotating electric machine by the following means.

According to the invention corresponding to claim 1, at the stator winding end portion of the rotating electric machine, two arc-shaped phase rings connecting the connecting conductor connected to the winding conductor and the lead-out conductor are arranged in the circumferential direction. A structure in which the connection ends of the respective phase rings with the connection conductor are arranged to face each other in the circumferential direction, and the facing portions are fixed by interposing a spacing block between the facing ends of the connection ends. The connecting conductor of the one phase ring is connected to the connecting end of the one phase ring with the other phase ring crossing.

According to the invention according to claim 1, since the rigidity of the connecting end of each phase ring is increased, the vibration of the phase ring due to the electromagnetic force is reduced, and the vibration of the entire winding conductor is suppressed. Reliability can be improved.

According to a second aspect of the invention, in the stator of the rotating electric machine according to the first aspect of the invention, the connecting ends of both phase rings are supported from the outside.

According to the invention according to claim 2, the rigidity of the phase ring can be further enhanced.

The invention corresponding to claim 3 is the stator of a rotating electric machine according to claim 1 or 2, wherein:
When the two phase rings arranged along the circumferential direction are on the same plane, one or both of the connection end portions of each phase ring with the connection conductor are offset in the radial direction so as to face each other.

The invention corresponding to claim 4 is the stator of the rotating electric machine according to claim 1 or 2, wherein:
When the two phase rings arranged along the circumferential direction are on the same plane, one or both of the connection end portions of each phase ring with the connection conductor are axially offset so as to face each other.

According to the inventions corresponding to claims 3 and 4, the phase rings can be connected while avoiding the interference of the phase rings.

The invention corresponding to claim 5 is the stator of the rotating electric machine according to claim 1 or 2, wherein:
When the two phase rings arranged along the circumferential direction are separated from each other in the axial direction, one or both of the connection ends of the phase ring with the connection conductor are axially arranged so that the interval between the facing portions is narrowed. It is a bent one.

According to the invention corresponding to the fifth aspect, the fixation between the phase rings can be strengthened.

According to a sixth aspect of the present invention, in the stator winding end portion of the rotating electric machine, two arc-shaped phase rings connecting the connecting conductor connected to the winding conductor and the lead-out conductor are arranged in the circumferential direction. Along the line, and the connection ends are appropriately spaced,
A reinforcing member is arranged between the connecting ends of both phase rings, and both phase rings are connected to each other, and the connecting conductor of the one phase ring connects the one phase ring by intersecting the reinforcing members. Connected to the end.

According to a seventh aspect of the invention, in the stator of the rotating electric machine according to the sixth aspect of the invention, an electrically insulating material is used for the reinforcing member.

The invention corresponding to claim 8 is the stator of the rotating electric machine according to claim 6 or 7, wherein:
A reinforcing member that connects the phase rings is supported from the outside.

According to the inventions corresponding to the above sixth to eighth aspects, the rigidity of the end portion of the phase ring is increased and the electromagnetic vibration is reduced. Particularly, in the invention corresponding to claim 7, reliability is improved by using an electrically insulating material for the reinforcing member. Further, the invention corresponding to claim 8 strengthens the fixing by supporting the reinforcing member from the outside.

According to a ninth aspect of the present invention, an annular reinforcing member is arranged along the connecting conductor connected to the winding conductor at the stator winding end of the rotating electric machine, and the reinforcing member is connected to the connecting conductor. Connect to the phase ring that is fixed to the lead conductor.

According to the invention corresponding to the above-mentioned claim 9, since the reinforcing member constitutes a ring, it has a strong rigidity, and by fixing the connecting conductor to this, the electromagnetic vibration of the connecting conductor can be reduced. You can

According to the tenth aspect of the invention, at the stator winding end portion of the rotating electric machine, the phase ring that connects the connecting conductor connected to the winding conductor and the lead-out conductor has an annular shape.

According to the invention corresponding to claim 10,
Since the connecting conductor branches off in the middle of the ring structure having high rigidity, electromagnetic vibration can be suppressed.

The invention corresponding to claim 11 is claim 10
In the stator of the rotating electric machine of the invention corresponding to, the branch positions of the connection conductors are arranged so as to be symmetrical with respect to the connection positions of the lead conductors in the phase ring.

According to the invention corresponding to claim 11,
Since the currents flowing from the branch points of the connecting conductors to the conductors on both sides of the phase ring are the same, the cross-sectional area of the conductor is half that of the conventional one, and the installation space can be reduced. Further, since the heat generation is also uniform, the load applied to the phase ring is equalized and stable support can be achieved.

An invention corresponding to claim 12 is claim 10
Alternatively, in the stator of the rotating electric machine of the invention according to claim 11, the conductor of the phase ring or the lead conductor has a divided structure.

The invention corresponding to claim 13 is claim 10
Alternatively, in the stator of the rotating electric machine of the invention according to claim 11, the lead conductor is divided and manufactured, and then assembled.

According to the inventions corresponding to claims 12 and 13, it is easy to carry in and assemble the phase ring,
The manufacturability can be improved.

[0046]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a structure of a stator winding end portion of a rotating electric machine according to a first embodiment of the present invention.

As shown in FIG. 1, two arc-shaped phase rings 7a and 7b are arranged along the circumferential direction and at appropriate intervals in the axial direction, and these two phase rings are arranged. The connecting ends of the phase rings 7a and 7b are made to face each other by axially interposing the connecting ends of the phase rings 7a and 7b. To join.

The connection ends of the phase rings 7a and 7b are bent in the radial direction and connected to the connection conductors 6a and 6b, and the connection conductor 6a is connected to the tip 3 of the upper coil conductor 1. The connection conductors 6b are connected to the tip portions 3 of the lower coils 4, respectively.

In this case, the connection conductors 6a and 6b are composed of a conductor portion extending in the radial direction and a conductor portion extending in the axial direction, and the conductor portion extending in the axial direction of the connection conductor 6b intersects below the connection end portion of the phase ring 7a. Then, the phase ring 7b is connected to the tip of the connecting end.

The phase rings 7a and 7b are supported by the bind ring support 11 at appropriate positions on the rings.

By thus connecting and integrating the connecting ends of the phase rings 7a and 7b, the whole is formed into an annular body.

With such a constitution of the stator winding end portion of the rotating electric machine, two arc-shaped phase rings arranged along the circumferential direction and at an appropriate interval in the axial direction. 7a, 7
By making the connecting ends of b face each other in the axial direction, they can be coupled to each other via a coupling member.

Further, since the two phase rings 7a and 7b are integrated to form an annular structure, it is possible to provide higher rigidity as compared with the conventional case where each of them is formed independently. it can. In particular, since the connecting ends of the phase rings 7a and 7b are coupled in the vicinity of the winding ends connected to the connecting conductors 6a and 6b, vibrations at the tips of the connecting ends connected to the connecting conductors can be suppressed small.

Therefore, the vibration of the connection ends of the phase rings 7a and 7b can be reduced, and the vibration propagating to the upper coil conductor 1 and the lower coil conductor 4 through the connection conductors 6a and 6b can be suppressed, so that the rotating electric machine can be suppressed. It is possible to greatly improve the reliability at the winding end portion of.

FIG. 2 is a perspective view showing a structure of a stator winding end portion of a rotary electric machine according to a second embodiment of the present invention.

As shown in FIG. 2, two arc-shaped phase rings 7a and 7b are arranged along the circumferential direction and at appropriate intervals in the axial direction, and these two phase rings are arranged. The connecting ends of 7a and 7b are axially opposed to each other, and a spacing block 14 is inserted between the facing surfaces of the connecting ends of the phase rings 7a and 7b.
A thread is bound by 5 to join the connection ends of the phase rings 7a and 7b.

The connecting ends of the phase rings 7a and 7b are connected to the connecting conductors 6a and 6b by bending the ends thereof in the radial direction, and the connecting conductor 6a is connected to the end 3 of the upper coil conductor 1. The connection conductors 6b are connected to the tip portions 3 of the lower coils 4, respectively.

In this case, the connection conductors 6a and 6b are composed of a conductor portion extending in the radial direction and a conductor portion extending in the axial direction, and the conductor portion extending in the axial direction of the connection conductor 6b intersects below the connection end portion of the phase ring 7a. Then, the phase ring 7b is connected to the tip of the connecting end.

A support plate 16 is provided near the connecting portion of the phase rings 7a and 7b by the spacing block 14, and the phase rings 7a and 7b are fixed to the support plate 16 using the glass roving 15. The support plate 16 can also have the function of supporting the bind ring of the bind ring support 11.

The phase rings 7a and 7b are supported by the bind ring support 11 at appropriate positions on the rings.

By thus connecting and integrating the connection ends of the phase rings 7a and 7b, the whole is formed into an annular body.

With the structure of the stator winding ends of the rotary electric machine as described above, the same operation and effect as in the first embodiment can be obtained, and the connecting ends of the phase rings 7a and 7b face each other. Since the parts are connected by the thread binding 15 and the support plates 16 support the phase rings 7a and 7b at positions close to the respective ends connecting the connection conductors 6a and 6b, the phase rings 7a and 7b are Since it is integrated, the rigidity is increased, and particularly the vibration of the connection portion with the connection conductors 6a and 6b is suppressed, so that the load on the winding conductor can be reduced.

FIG. 3 is a perspective view showing a structure of a stator winding end portion of a rotating electric machine according to a third embodiment of the present invention.

As shown in FIG. 3, two arc-shaped phase rings 7a and 7b are arranged along the circumferential direction and on the same plane, and at the same time, these two arc-shaped phase rings 7a and 7b are arranged.
The connecting ends of 7b are made to face each other in the radial direction, and the spacing block 14 is inserted between the facing surfaces of the connecting ends of the phase rings 7a and 7b, and this portion is thread-locked by the glass roving 15 to make the phase. The connecting ends of the rings 7a and 7b are joined together.

In this embodiment, one phase ring 7b is used.
Of the phase ring 7a is bent in the direction of being located on the lower surface side of the connection end portion of the phase ring 7a, and the two are opposed to each other through the lower surface side of the connection end portion of the phase ring 7a.

The connection ends of the phase rings 7a and 7b are connected to the connection conductors 6a and 6b by bending the ends thereof in the axial direction, and the connection conductor 6a is connected to the end of the upper coil conductor 1. The conductors 6b are respectively connected to the tips of the lower coils.

In this case, the connection conductors 6a and 6b are composed of a conductor portion extending in the radial direction and a conductor portion extending in the axial direction, and the conductor portion extending in the axial direction of the connection conductor 6a intersects above the connection end portion of the phase ring 7b. Then, it is connected to the tip of the connection end of the phase ring 7a.

With such a structure of the stator winding end portion of the rotating electric machine, in addition to the same operational effect as the first embodiment, the two phase rings 7a and 7b are formed on the same plane. Even if the connection ends interfere with each other by arranging them on the upper side, it is possible to connect the connection ends facing each other.

FIG. 4 is a perspective view showing a structure of a stator winding end portion of a rotating electric machine according to a fourth embodiment of the present invention.

As shown in FIG. 4, two arc-shaped phase rings 7a and 7b are arranged along the circumferential direction and on the same plane, and at the same time, these two arc-shaped phase rings 7a and 7b are arranged.
The connecting ends of 7b are axially opposed to each other, and the spacing block 1 is provided between the facing surfaces of the connecting ends of the phase rings 7a and 7b.
4 and insert this part with glass roving 1
A thread is bound by 5 to join the connection ends of the phase rings 7a and 7b.

In this embodiment, one phase ring 7b is used.
Bend the connection end of the outside of the tip of the phase ring 7a,
Both of them are opposed to each other through the outer surface of the connection end of the phase ring 7a.

The connecting ends of the phase rings 7a and 7b are connected to the connecting conductors 6a and 6b by bending their ends in the radial direction, and the connecting conductor 6a is connected to the leading end of the upper coil conductor 1. The conductors 6b are respectively connected to the tips of the lower coils.

In this case, the connection conductors 6a and 6b are composed of a conductor portion extending in the radial direction and a conductor portion extending in the axial direction, and the conductor portion extending in the axial direction of the connection conductor 6a intersects below the connection end portion of the phase ring 7b. Then, it is connected to the tip of the connection end of the phase ring 7a.

With such a structure of the stator winding end portion of the rotary electric machine, the same function and effect as those of the first embodiment can be obtained, and the two phase rings 7a and 7b are formed on the same plane. Even if the connection ends interfere with each other by arranging them on the upper side, it is possible to connect the connection ends facing each other.

FIG. 5 is a perspective view showing a structure of a stator winding end portion of a rotary electric machine according to a fifth embodiment of the present invention.

As shown in FIG. 5, two arc-shaped phase rings 7a and 7b are arranged along the circumferential direction and axially separated from each other, and a space is provided between the connection end portions of both. If the block is inserted and connected by thread binding, the length of the glass roving of the thread binding becomes long, the tension is weakened, and the connection rigidity may be lowered.

Therefore, in the fifth embodiment, the phase ring 7a is bent outward in the vicinity of its connecting end and connected to the connecting conductor 6a, and the phase ring 7b is inward in the vicinity of its connecting end. It is bent and connected to the connection conductor 6b.
That is, the connection ends of the phase rings 7a and 7b are bent so that the intervals are narrowed, and the two are axially opposed to each other, and the interval block 14 is inserted between the opposed surfaces of the connection ends of the phase rings 7a and 7b. , This part is thread-tied by the glass roving 15 and the phase ring 7a
And 7b connecting ends.

In this case, the connection conductors 6a and 6b are composed of a conductor portion extending in the radial direction and a conductor portion extending in the axial direction, and the conductor portion extending in the axial direction of the connection conductor 6a intersects below the connection end portion of the phase ring 7b. Then, it is connected to the tip of the connection end of the phase ring 7a.

With the structure of the stator winding end portion of the rotary electric machine as described above, the same function and effect as in the first embodiment can be obtained, and the phase rings 7a and 7b are separated from each other in the axial direction. Even when they are arranged in the circumferential direction, they can be connected without reducing the rigidity of the connection.

FIG. 6 is a perspective view showing a structure of a stator winding end portion of a rotating electric machine according to a sixth embodiment of the present invention.

As shown in FIG. 6, two arc-shaped phase rings 7a, which are arranged in the circumferential direction and are axially separated from each other,
When the entire structure is not annular even when 7b is provided, an arc-shaped reinforcing member 17 is provided between the connection ends of the phase rings 7a and 7b.
And the portions corresponding to both ends of the reinforcing member 17 are connected to the connecting ends of the phase rings 7a and 7b by thread bindings 18, respectively.

In this case, the connection conductors 6a and 6b are composed of a conductor portion extending in the radial direction and a conductor portion extending in the axial direction, and the conductor portion extending in the axial direction of the connection conductor 6b intersects the lower side of the reinforcing member 17 and the phase ring. It is connected to the tip of the connection end of 7b.

With such a structure of the stator winding ends of the rotary electric machine, since the phase rings 7a and 7b form an annular structure, the supporting rigidity of the connecting portions of the connecting conductors 6a and 6b is increased, and the electromagnetic waves are prevented. Vibration can be reduced.

The surfaces of the phase rings 7a and 7b are generally subjected to an insulating treatment, but in order to have a higher electrical insulation, the reinforcing member 17 is made of glass.
It is effective to use an insulating material such as epoxy.

FIG. 7 is a perspective view showing a structure of a stator winding end portion of a rotating electric machine according to a seventh embodiment of the present invention.

As shown in FIG. 7, two arc-shaped phase rings 7a, which are arranged in the circumferential direction and are axially separated from each other,
When the entire structure is not annular even when 7b is provided, an arc-shaped reinforcing member 17 is provided between the connection ends of the phase rings 7a and 7b.
Are arranged, and the portions corresponding to both ends of the reinforcing member 17 are connected to the connection ends of the phase rings 7a and 7b by thread bindings 18, respectively. In this case, a supporting plate 19 is attached to the reinforcing member 17, and the supporting member 19 supports the reinforcing member 17.

In this case, the connection conductors 6a and 6b are composed of a conductor portion extending in the radial direction and a conductor portion extending in the axial direction, and the conductor portion extending in the axial direction of the connection conductor 6b intersects the lower side of the reinforcing member 17 and the phase ring. It is connected to the tip of the connection end of 7b.

With such a structure of the stator winding end portion of the rotating electric machine, since the reinforcing member 17 is supported by the supporting plate 19, the reinforcing member 17 has high rigidity and the phase connected to the reinforcing member 17 is high. Vibration of the rings 7a and 7b can be suppressed. Further, the support plate 19 may be provided with a function of supporting the bind ring.

FIG. 8 is a perspective view showing a structure of a stator winding end portion of a rotating electric machine according to an eighth embodiment of the present invention.

In this embodiment, as shown in FIG. 8, one phase ring 7 and the reinforcing ring 20 are arranged at an appropriate distance in the axial direction of the phase ring 7 and connected to the phase ring 7. While connecting the conductor portion extending in the axial direction of the conductor 6,
The reinforcing ring 20 is supported by the bind ring support 11 connected to the phase ring by the thread tie 18 made of glass roving in the arrangement direction of the connecting conductors, and the connecting conductor 6 is fixed to the reinforcing ring 20.

With such a structure of the stator winding end portion of the rotating electric machine, the displacement of the connecting conductor 6 is restrained by the reinforcing ring 20, so that the electromagnetic vibration of the connecting conductor 6 can be suppressed.

FIG. 9 is a perspective view showing the structure of a stator winding end portion of a rotating electric machine according to a ninth embodiment of the present invention.

In the ninth embodiment, as shown in FIG. 9, two phase rings 7a and 7b are formed of an annular conductor, and these phase rings 7a and 7b are arranged along the outer circumference of the lower coil conductor 4. In addition, it is supported by the bind ring support 11.

FIG. 10 is a front view showing the structure of the phase ring 7a.

As shown in FIG. 10, the phase ring 7a includes
The two connecting conductors 6a and 6a 'and the lead conductor 8a are connected. In the figure, 23, 24, and 25 are phase ring dividing points, and 26 is a lead conductor dividing point.

Since the phase ring 7a has an annular shape, it has a high rigidity as a whole, and electromagnetic vibrations at the connecting portions with the connecting conductors 6a and 6a 'can be suppressed by the structure of the phase ring 7a itself. .

On the other hand, FIG. 12 is a front view showing the structure of the conventional phase ring 7a. In the conventional phase ring 7a, conductors extend from the lead conductor 8a to both sides in an arc shape, and both ends of the arc are terminated. It has a structure in which the connection conductors 6a and 6b are connected.

In this structure, since the phase ring conductors on both sides have a cantilever structure with the connection portion with the lead-out conductor 8a as a fulcrum, the rigidity of the connection conductors 6a and 6b, which are the terminations, is as shown in FIG. It is significantly lower than

According to the structure of the stator winding end of the rotating electric machine as described above, the phase ring is formed in an annular shape to have high rigidity and suppress electromagnetic vibration generated in the connecting conductor. You can

FIG. 11 is a front view of a phase ring at a stator winding end portion of a rotating electric machine according to a tenth embodiment of the present invention.

As shown in FIG. 11, in the ninth embodiment described above, the connection positions of the connection conductors are arranged symmetrically with respect to the connection positions of the lead conductors. That is, the phase ring 7a has an annular shape, and the lead conductor 8a is connected to the lower portion thereof. A connecting conductor 6a is branched from the phase ring 7a at a position 180 ° from the connecting position of the lead conductor 8a with respect to the center of the phase ring 7a. The connection conductor 6a extends from the branch point along the inner circumference of the phase ring 7a to the connection position with the lower coil conductor 4.

Further, a spacing block 21 is inserted between the connecting conductor 6a and the phase ring 7a, and is fixed by thread binding with a glass roving 22. The other connection conductor 6a 'extends from the same position as the connection point of the lead conductor 8a to the connection position with the upper coil conductor along the inner circumference of the phase ring 7a. Similarly, the connecting conductor 6a 'is also fixed by thread binding by the glass roving 22 via the spacing block 21 inserted between the phase rings 7a.

With such a structure of the stator winding end of the rotary electric machine, the distance along the phase ring 7a from the branch point of the connection conductor 6a from the phase ring 7a to the connection point of the lead conductor 8a is It is equidistant on both sides of the bifurcation. In this case, the electric resistances of the conductors are equal on both sides of the phase ring 7a, and therefore the flowing currents are also equal.

Therefore, the conductor cross-sectional area of the annular portion of the phase ring 7a can be halved as compared with the conventional one. Also,
Since the heat generation is uniform, the load applied to the phase ring is also equalized and stable support can be achieved. As a result, the branched connection conductors 6a and 6a 'can be closely fixed to the ring-shaped phase ring 7a, so that high rigidity can be obtained and electromagnetic vibration can be suppressed.

FIG. 10 shows the structure of the phase ring at the stator winding end portion of the rotating electric machine according to the eleventh embodiment of the present invention.
Will be explained.

In the eleventh embodiment, as shown in FIG. 10, the phase ring 7a and the lead conductor 8a are separately manufactured and then joined at the time of assembly. In FIG. 10, the phase ring 7a is joined at the division points 23, 24 and 25. The lead conductor 8a is joined to the phase ring 7a at the dividing point 26.

Generally, the stator winding is installed inside the stator frame, and it is difficult to install the phase ring 7a in the annular shape.

The phase ring is typically assembled inside the stator frame. It is difficult to carry the ring-shaped phase ring into the narrow stator frame and assemble it as it is.

According to the present embodiment, since the phase ring 7a and the lead conductor 8a can be divided and carried into the installation place, the winding end portion can be easily assembled and manufactured.

[0111]

As described above, according to the present invention, in the stator winding end portion of the rotating electric machine, electromagnetic vibration generated in the winding conductor due to energization is reduced, and the stator of the rotating electric machine has high reliability. Can be provided.

[Brief description of drawings]

FIG. 1 is a first end portion of a stator winding of a rotary electric machine according to the present invention.
The perspective view which shows the embodiment of FIG.

FIG. 2 is a second end portion of a stator winding of a rotating electric machine according to the present invention.
The perspective view which shows the embodiment of FIG.

FIG. 3 is a third end portion of a stator winding of a rotating electric machine according to the present invention.
The perspective view which shows the embodiment of FIG.

FIG. 4 is a fourth end portion of a stator winding of a rotating electric machine according to the present invention.
The perspective view which shows the embodiment of FIG.

FIG. 5 is a fifth end portion of a stator winding of a rotating electric machine according to the present invention.
The perspective view which shows the embodiment of FIG.

FIG. 6 is a sixth view of the stator winding end portion of the rotating electric machine according to the present invention.
The perspective view which shows the embodiment of FIG.

FIG. 7 is a seventh end portion of a stator winding of a rotating electric machine according to the present invention.
The perspective view which shows the embodiment of FIG.

FIG. 8: Eighth end of stator winding of rotating electric machine according to the present invention
The perspective view which shows the embodiment of FIG.

FIG. 9 is a ninth part of the stator winding end portion of the rotating electric machine according to the present invention.
The perspective view which shows the embodiment of FIG.

FIG. 10 is a front view of the phase ring according to the same embodiment.

FIG. 11 is a configuration diagram showing a tenth embodiment of a stator winding end portion of a rotary electric machine according to the present invention.

FIG. 12 is a front view showing a phase ring at a stator winding end portion of a conventional rotating electric machine.

FIG. 13 is a cross-sectional view showing a stator winding end portion of a conventional rotating electric machine.

FIG. 14 is a view for explaining a fixing means of a stator winding end portion of a conventional rotating electric machine.

FIG. 15 is a diagram showing an electromagnetic vibration analysis result at a stator winding end portion of a conventional rotating electric machine.

[Explanation of symbols]

1 ... Upper coil conductor 2 ... Iron core end 3 ... Tip of conductor 4 ... Lower coil conductor 5 ... Iron core end 6 ... Connection conductor 7 ... Phase ring 8 ... Output conductor 9 ... Glass roving 10 ... Bind ring 11 ... Bind ring support 12 ... Winding conductor 13 ... Vibration absorber 14 ... Interval block 15 ... Glass roving 16 ... Support plate 17 ... Reinforcing member 18 ... Glass roving 19 ... Support plate 20 ... Reinforcing member 21 ... Interval block 22 ... Glass roving 23 ... Phase ring division point 24 ... Phase ring division point 25 ... Phase ring division point 26 ... Output conductor dividing point

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yukihiko Kazao             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office (72) Inventor Masashi Fujita             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office (72) Inventor Hitoshi Katayama             2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa               Toshiba Keihin Office F-term (reference) 5H604 AA05 BB04 BB10 BB14 CC01                       CC05 CC14 DA06 DB24 QA01                       QA08 QB01 QB14

Claims (13)

[Claims] 1. A connecting conductor, which is connected to a winding conductor, and a lead conductor at an end of a stator winding of a rotating electric machine.
Arc-shaped phase rings of a book are arranged along the circumferential direction,
Moreover, the connection ends of the respective phase rings with the connection conductor are arranged so as to face each other in the circumferential direction, and the facing portions are fixed by interposing a spacing block between the facing ends of the connection ends. A stator of a rotating electric machine, wherein a connecting conductor of the ring is connected to the connecting end of the one phase ring while intersecting the other phase ring. 2. The stator of a rotary electric machine according to claim 1, wherein the connecting ends of both phase rings are supported from the outside, respectively. 3. The stator for a rotary electric machine according to claim 1 or 2, wherein when two phase rings arranged along the circumferential direction are on the same plane, A stator of a rotating electric machine, wherein one or both of connection ends of the connection conductor are displaced in a radial direction to face each other. 4. The stator of a rotary electric machine according to claim 1 or 2, wherein when two phase rings arranged along a circumferential direction are on the same plane, A stator for a rotating electric machine, wherein one or both of the connection end portions with the connection conductor are axially displaced to face each other. 5. The stator of a rotary electric machine according to claim 1 or 2, wherein when the two phase rings arranged along the circumferential direction are axially separated from each other, A stator for a rotating electric machine, characterized in that one or both of connection end portions with a connection conductor are axially bent so that a gap between opposing portions is narrowed. 6. A stator winding end portion of a rotating electric machine, wherein a connecting conductor connected to a winding conductor and a lead-out conductor are connected to each other.
The arc-shaped phase rings of the book are arranged along the circumferential direction and the connecting ends are appropriately separated, and a reinforcing member is arranged between the connecting ends of both phase rings and both phase rings are connected. According to another aspect of the present invention, the connecting conductor of the one phase ring is connected to the connecting end of the one phase ring by intersecting the reinforcing member. 7. The stator of a rotary electric machine according to claim 6, wherein the reinforcing member is made of an electrically insulating material. 8. The stator of a rotary electric machine according to claim 6 or 7, wherein a reinforcing member for connecting the phase ring is supported from the outside. 9. A stator winding end portion of a rotating electric machine, wherein an annular reinforcing member is disposed along a connecting conductor connected to the winding conductor, and the reinforcing member is fixed to the connecting conductor to form a lead conductor. A stator of a rotating electric machine, which is characterized by connecting connected phase rings. 10. A stator winding end portion of a rotating electric machine,
A stator for a rotating electric machine, wherein a phase ring connecting a connection conductor connected to a winding conductor and a lead conductor has an annular shape. 11. A rotating electric machine stator according to claim 10, wherein the connecting position of the connecting conductor with the phase ring is arranged symmetrically with respect to the connecting position of the lead conductor and the phase ring. Electric machine stator. 12. The stator of a rotary electric machine according to claim 10 or 11, wherein the phase ring conductor is divided and manufactured, and then assembled. 13. The stator of a rotary electric machine according to claim 10, wherein the lead conductor is divided and manufactured, and then assembled.