JP2602829B2 - Armature winding of rotating electric machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an armature winding of a rotating electric machine, and particularly to a material and a material which are used for insulation work using an insulation tube of a crossover without lowering insulation reliability. The present invention relates to an armature winding of a rotating electric machine suitable for reducing man-hours.

[Prior Art] Regarding conventional technology, three-phase four-pole A description will be given with reference to FIG. 21 and FIG. 22 of an example of an armature winding of a stator having a connection, a two-stage / one-stage concentrically wound coil, and 36 slots.

In FIGS. 21 and 22, numerals 1 to 36 in the drawings indicate slot numbers. In FIG. 22, a solid line indicates a U-phase winding, a broken line indicates a V-phase winding, and a two-dot chain line indicates a W-phase winding. Reference symbol S in FIG. 21 indicates a stator core.

That is, in this armature winding, a U-phase winding, a V-phase winding, and a W-phase winding are arranged at different positions along the radial direction for each phase on the end face of the stator core S. A plurality is provided concentrically adjacent to each other.

The winding of each phase is composed of a two-stage wound coil × 2 sets and a one-stage wound coil × 2 sets.
Lead wires U _t , V _t , and W _t are respectively drawn from one of the two-stage winding coils, and a crossover U reaching a neutral point from one of the two-stage winding coils.
_l , V _l , and W _l are extracted.

The winding of each phase is composed of an enamel-coated insulated wire, but in order to ensure insulation reliability against a potential difference from a winding of a different phase, a film (for example, 0.18 mm polyester film) -shaped interphase insulator I _p is used. Mounted between the coils.

The coil-to-coil interphase connection portion C has a neutral point connection portion N,
Connecting wire _{U l, V l, W l} , insulation tube T _u, T _v, consists T _w and the insulating coating I _n.

The neutral point connection portion N is connected by means such as soldering, welding, fusing (thermocompression bonding), or compression bonding.

Insulating coating I _n the tube (e.g., a varnish tetronic tubes or polyester tubes), a tape, or the insulating material such as film is used, FIG. 21 and the
Since an insulating tube is used in the example shown in FIG. 22, the structure shown in the drawing is used to secure a space distance and a creepage distance on the insulation of the neutral point connection portion N with respect to the coil.

The crossovers U _l , V _l , and W _l are flexible bodies and their shapes are indefinite, and the path from the pull-out position to the connection position between the coil phases is not generally restricted in terms of insulation work. Therefore, since the crossovers U _l , V _l , and W _l abut against the out-of-phase coils, from the viewpoint of ensuring the reliability of inter-phase insulation,
Cover the crossover lines U _l , V _l , and W _l with insulating tubes _Tu , T _v , T _w (for example, a wanistetron tube or a polyester tube), and cover the portions covered with the insulating tubes _Tu , T _v , T _w. by placing on the coil is inserted into the insulating coating I _n as shown superimposed parts, and so as to reinforce the insulation.

Further, the crossover lines U _l , V _l , W _l and the coil phase connection portion C are
It is bound and fixed together with the coil by means such as racing or taping (not shown).

On the other hand, as another conventional example in the insulation work of the crossover,
There is a technique described in Japanese Utility Model Laid-Open No. 53-51901. In this conventional example, the path of the crossover to the in-phase coil is specified, and is applied only to the crossover of the outermost coil as viewed from the axis of the stator.

However, in the conventional example described in Japanese Utility Model Application Laid-Open No. 53-51901, no consideration is given to the path of the crossover to the different-phase coil.

[Problems to be Solved by the Invention] In recent years, winding work of a rotating electric machine has been automated, but connection and insulation work of a crossover wire and a lead wire in a subsequent process mainly depend on human labor.

In particular, the operation of inserting the insulation tube in the insulation work of the crossover wire is difficult to automate because the crossover wire is a flexible body and its shape is uncertain, which has been a bottleneck in the production of armature windings.

On the other hand, the conventional example described in Japanese Utility Model Publication No. 53-51901,
Although the operation of inserting the insulating tube is partially omitted by specifying the path of the crossover to the in-phase co-oil, the path of the crossover to the out-of-phase coil is not considered and is insufficient.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the prior art, to reduce the materials and man-hours involved in the insulation work using the insulation tube of the crossover without reducing the insulation reliability, and to reduce the size and temperature characteristics of the rotating electric machine. It is an object of the present invention to provide an armature winding of a rotating electric machine which can improve the power consumption.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, an insulating coating is disposed on any one-phase coil, and one end of the insulating coating is made the same as the coil. Positioned at a position between in-phase coils adjacent on the circumference, at least of the crossover wires drawn from each phase coil, at least a crossover wire from a different-phase coil adjacent to the coil on which the insulating coating is arranged is located at the portion. An inter-phase insulator between the hetero-phase coil and the one-phase coil is inserted into the insulating coating from one end thereof while the insulator is not mounted, and a neutral point connecting portion in the insulating coating is inserted. And the one-phase coil-side connecting wire on which the insulating coating is arranged is inserted into the insulating coating without attaching an insulator, and a neutral point connection portion in the insulating coating is provided. Connected to It is characterized by the following.

[Action]

As described above, at least the crossover wires from the one-phase coil in which the insulating coating is arranged and the adjacent-phase coil are adjacent to each other. The crossover wire on the one-phase coil side, which is inserted into the insulating coating from one end thereof and connected to the neutral point connection portion in the insulating coating while the insulating coating is not disposed, is also provided. Is inserted into the insulation coating without the insulator attached, and is connected to the neutral point connection portion in the insulation coating, whereby at least the crossover wire drawn from the two-phase coil is connected to the insulation tube. Since there is no need to attach the insulation coating of the coil phase connection part to the insulation tube of the crossover, it is not necessary to configure the insulation coating of the coil phase connection part as compared with the conventional technology, and the size of the coil phase connection part can be reduced accordingly. Kill result, it is possible to reduce the size of the rotary electric machine, yet it is possible to improve the temperature characteristics.

EXAMPLES Hereinafter, examples of the present invention will be described with respect to three winding specifications.

1) 3 phase 4 pole- Example of connection, two-stage / one-stage concentrically wound coil The winding specification of the embodiment 1) is the same as that of the conventional example.

Regarding the embodiment 1), five series of embodiments will be sequentially described.

(Embodiment 1) FIGS. 1 and 2 are explanatory views of Embodiment 1 and FIG.
FIG. 20 to FIG. 20 are views showing various aspects of the crossover and the connection between the coil phases.

In FIGS. 1 and 2, the same or corresponding parts as in FIGS. 21 and 22 showing the conventional example are denoted by the same reference numerals.

The main difference between the first embodiment and the conventional example in the configuration is that the crossover and the connection between the coil phases are arranged on the coil.

Connecting wire W drawn out from the slot 22 of the coil W _4
l is placed on the coil W _4, and is connected to the other connecting wire via the site between the coil W ₄ and the coil W _3.

Crossover line V drawn from the slot 16 of the coil V _4
l is disposed on the coil V ₄ , and the V-phase / W-phase interphase insulator I
The _p traversed as FIG. 17 at the site between the coil W ₄ and the coil W _3, via the site is connected to the other connecting wire.

Connecting wire U drawn from the slot 10 of the coil U _4
l is insulated and reinforced by the insulating tube _Tu , and the coil U ₄ → U
Disposed in the path of the phase / phase insulators of V-phase I _p → coil V ₄ → V-phase / W phase insulation of the phase I _p, the other connecting wire via the site between the coil W ₄ and the coil W ₃ Is connected to In this case, the position where connecting wire U _l traverses the interphase insulator I _p of the V-phase / W phase is not a specific part between the coil W ₄ and the coil W ₃ is desirable.

The crossovers U _l , V _l , and W _l are connected to the neutral point connection portion N, and the connection portion is inserted into the insulating coating _Ip to form the coil phase connection portion C.

The inter-coil phase connection portion C is connected to the coil W ₄ of the crossovers U _l , V _l , and W _l.
And for the site between the coils W ₃ until neutral point connection portion N, the insulating tube is subjected to insulating coating I _n, is disposed on the coil W _3. In this case, an insulating tube T _u of the insulating coating I _n the connecting wire U _l of the coil interphase connecting section C may not be the overlapped portion as in the conventional example.

The crossovers U _l , V _l , W _l and the inter-coil phase connecting portion C are fixed together with the coil by means such as lacing or taping (not shown).

According to the first embodiment, crossover wire V _l, W _l is because never abuts or contacts the secondary phase coils, without isolation tool with an insulating tube can ensure insulation reliability. Therefore, of the crossovers U _l , V _l , and W _l of the coil interphase connection C, 2
With respect to the wire, materials and man-hours involved in the insulation work using the insulating tube can be reduced.

Further, insulating coating I _n the coil interphase connecting portion C is not required to be configured by superimposing an insulating tube of the connecting line. Therefore, the dimensions of the coil-to-phase connection portion C can be made smaller than in the conventional example, so that the rotating electric machine can be made more compact.

Furthermore, as much as the insulation tube of the crossover has been removed,
The cooling performance of the coil is improved, and the temperature characteristics of the rotating electric machine can be improved.

Next, various aspects of the arrangement of the connecting wires and the connection portions between the coil phases will be described.

The mode of the crossover _Vl with respect to the interphase insulator _Ip is described in the 17th embodiment.
But is shown in the figure, as shown in FIG. 18 or FIG. 19, 'previously formed and the groove H or H' advance groove H or H to interphase insulator I _p and the crossover V _l to It may be inserted and arranged. This makes the arrangement of the crossovers easier and more reliable.

The coil interphase connecting portion C is as described above, since the size can be reduced, as shown in FIG. 20, and inserted into the site between the coil W ₄ and the coil W _3, it may be disposed. In this case, if an insulating tube insulating coating I _n, it is necessary to employ a material obtained by fully welding or bonding the one end of the insulating tube from the point of spatial distance and creepage distance of the insulating.

With this configuration, the inter-coil phase connection portion C can be accommodated between the coils, which is further advantageous in reducing the size of the rotating electric machine.

The coil interphase connecting portion C depending on the specification of the rotary electric machine, while the coil W ₃ and interphase insulator I _p or coil W _4,
And inter-phase insulator _Ip .

Second Embodiment Next, FIGS. 3 and 4 are explanatory diagrams of a second embodiment.

The second embodiment is different from the first embodiment in that the inter-coil phase connection portion C is arranged in the U-phase winding located on the inner periphery of the armature winding, and has a configuration similar to the first embodiment. I have. Therefore, according to the second embodiment, the same operations and effects as those of the first embodiment are obtained.

FIGS. 5 and 6 show a modification of the second embodiment. As can be seen in comparison with FIGS. 3 and 4, only the arrangement of the crossover line _Ul is different. Other configurations are the same as those shown in FIGS. 3 and 4.

Third Embodiment FIGS. 7 and 8 are explanatory diagrams of the third embodiment.

The third embodiment is different from the first embodiment in that the inter-coil phase connecting portion C is arranged in the V-phase winding located at the center of the armature winding.

Connecting wire W drawn out from the slot 22 of the coil W _4
l is disposed on the coil W ₄ → coil W ₃ , crosses the V-phase / W-phase interphase insulator _Ip at the portion between the coil V ₃ and the coil V ₄ as described above, and passes through the portion. Connected to other crossovers.

Crossover line V drawn from the slot 16 of the coil V _4
l is placed on the coil V _4, is connected to the other connecting wire via the site between the coils V ₃ and the coil V _4.

Connecting wire U drawn from the slot 10 of the coil U _4
l is placed on the coil U _4, U-phase / V interphase insulator of phase I
The _p traversed as described above at a site between the coil V ₃ and the coil V _4, via the site is connected to the other connecting wire.

The crossover lines U _l , V _l , and W _l are connected by the above-mentioned means, and constitute the neutral point connection portion N.

The coil phase connection portion C is connected to the coil V ₃ of the crossovers U _l , V _l , and W _l.
And for the site between the coil V ₄ to the neutral point connection portion N has been subjected to insulating coating I _n by an insulating tube, it is arranged on the coil V _3.

The crossovers U _l , V _l , W _l and the inter-coil phase connecting portion C are fixed together with the coil by means such as lacing or taping (not shown).

According to the third embodiment, since the crossovers U _l , V _l , and W _l do not abut or contact the different-phase coil, insulation reliability can be ensured without performing insulation work with an insulating tube.

Therefore, the connecting wires U _l , V _l , W _{l of} the coil-to-phase connection section C are provided.
For all of the above, the materials and man-hours involved in the insulation work using the insulating tube can be reduced.

Further, the incidental effect due to the reduction of the insulating tube of the crossover can be improved to be equal to or more than that of the first embodiment.

Note that the arrangement of the crossover lines U _l , V _l , W _l and the coil phase connection portion C is the same as in the first embodiment.

Fourth Embodiment FIGS. 9 and 10 are explanatory diagrams of a fourth embodiment.

The main difference between the fourth embodiment and the third embodiment in the configuration is that the crossover lines U _l , V _l , and W _l are drawn out of the slots.

That is, the crossover lines U _l , V _l , and W _l are the minimum pitch coil sides (the slots 10, 16, 2 in FIG. 8) in the third embodiment.
2), the maximum pitch coil sides (slots 9 and 1 in FIG.
5, 21).

The configuration is disclosed in Japanese Patent Application No. 54-80184 or Japanese Patent Application No. 58-5.
In the fourth embodiment, the method described in Japanese Patent Application No. 58-52372 is applied to the armature winding of the third embodiment.

According to the fourth embodiment, since the crossover does not contact the maximum pitch coil orthogonally as in the third embodiment, the insulation properties of the crossover can be improved.

Fifth Embodiment FIG. 11 and FIG. 12 are diagrams for explaining a fifth embodiment.

The main difference between the fifth embodiment and the third embodiment in the configuration is that the crossover lines U _l , V _l , and W _l are drawn out of the slots.

That is, the crossovers U _l , V _l , and W _l are respectively drawn out from the inner coil sides (slots 10, 16, and 22 in FIG. 8) in the third embodiment, whereas the fifth embodiment is different from the fifth embodiment. Are drawn out from the outer coil sides (19, 25, 31 in FIG. 12).

The above configuration is obtained by exchanging the lead-out positions of the lead wires and the crossover wires of the coil interphase connection part in the armature winding of the third embodiment.

According to the fifth embodiment, since the crossover does not abut perpendicularly to the outer coil (maximum pitch coil) as in the third embodiment, the insulation properties of the crossover can be improved.

Above, 3 phase 4 pole- In the connection, two-stage / one-stage concentrically wound coil, the embodiment of five series was described. Also in the connection, two-stage / one-stage concentrically wound coil, by dividing the coil interphase connecting portion (neutral point connecting portion) into two portions, the same configuration and effect as in the above embodiment can be obtained. .

2) 3 phase 4 pole- FIGS. 13 and 14 are explanatory diagrams of the embodiment of 2). Parts corresponding to the above 1) embodiment are indicated by the same reference numerals. ing.

The configuration of the second embodiment corresponds to the fourth embodiment. Therefore, in the second embodiment, the operation and effect can be obtained in the same manner as in the fourth embodiment.

3) 3 phase 2 pole- Example of connection, two-stage / two-stage concentrically wound coil FIGS. 15 and 16 are explanatory diagrams of the embodiment of 3).

The reference numerals in FIG. 15 and FIG. 16 are added corresponding to the above-mentioned conventional example.

 Note that lead wires are omitted in FIG.

The stator according to the embodiment 3) has 24 slots and six sets of two-stage coils. The windings of each phase are arranged as shown in the figure, and lead wires (six wires) and crossover wires (six wires) are drawn out. 2 Wired.

In the embodiment 3), the connecting wires (six wires) and the connecting portions between the coil phases (two locations) are configured as follows.

Connecting wire W drawn out from the slot 8 of the coil W _1
1 is connected to the other connecting wire via the site between the coils W ₁ and the coil V _1.

Crossover line V drawn from the slot 16 of the coil V _1
1 is disposed on the coil V ₁ and the coil W ₁ and the coil V
_It is connected to other crossovers via the part between _one .

Connecting wire U drawn from the slot 12 of the coil U _1
1 is disposed on the coil U _1, with the interphase insulator I _p at the site between the coils W ₁ and the coil V _1, transversely as in the embodiment shown in the FIG. 17, through the site other It is connected to the crossover.

The crossovers U ₁ , V ₁ , and W ₁ are connected together by the above-described means to form a neutral point connection portion N ₁ .

The coil-to-phase connection section C ₁ is provided with crossover wires U ₁ , V ₁ , W ₁
The coil W ₁ and the neutral point connection portion N ₁ from the site between the coil V ₁
Insulating insulating coating I _n is performed by a tube, it is arranged on the coil W ₁ for up.

On the other hand, connecting wire U _2l, V _2l, also in W _2l and the coil interphase connecting portion C _2, and is configured similarly to the Figure 15 and Figure 16.

Finally, the crossovers U ₁ , V ₁ , W ₁ , U _2l , V _2l , W _2l
The coil-to-coil phase connecting portions C ₁ and C ₂ are bound together with the coil and fixed by means such as lacing or capping (not shown).

According to the embodiment of 3), the crossovers U ₁ , V ₁ , W
₁ , _U2l , _V2l and _W2l do not abut or contact the different-phase coil, so that insulation reliability can be ensured without performing insulation work with an insulating tube.

Therefore, it is possible to reduce the materials and man-hours required for the insulation work using the insulating tube for all of the crossover wires (six wires) of the coil phase connection portion.

Further, the attendant effect due to the reduction of the number of the insulating tubes of the crossover is the same as that of the embodiment 1).

The embodiment in the arrangement of the connecting wires and the connection portions between the coil phases is also the same as the embodiment 1).

It should be noted that the present invention is not limited to a connection between coil phases such as a neutral point. For example, the present invention can be applied to a Δ connection portion of a three-phase armature winding and a connection portion between a main coil and a supplementary coil of a single-phase armature winding.

[Effects of the Invention] According to the present invention described above, an insulating coating is disposed on any one-phase coil, and one end of the insulating coating is placed between in-phase coils adjacent on the same circumference as the coil. Of the crossover wires drawn from each phase coil, at least a crossover wire from a different phase coil adjacent to the coil on which the insulating coating is disposed is the different phase coil and the one-phase coil in the portion. The interphase insulator is inserted into the insulating coating from one end thereof while the insulator is not attached, and connected to a neutral point connection portion in the insulating coating. The one-phase coil-side connecting wire to be arranged is inserted into the insulating coating without an insulator attached, and is connected to a neutral point connection portion in the insulating coating, thus forming a different phase. At least two It is no longer necessary to provide an insulation tube on the crossover, and the insulation work with the insulation tube on the crossover, which is difficult to automate, has been omitted, and the configuration has been made so that the coil phase connection itself can be downsized while maintaining insulation. The effect is as follows.

(1) The materials and man-hours involved in inserting the insulating tube of the crossover can be reduced, and therefore the cost of the rotating electric machine can be reduced.

(2) The rotating electric machine can be made compact and temperature characteristics can be improved.

[Brief description of the drawings]

Figures 1 to 12 show three-phase four- FIG. 1 shows an embodiment of the present invention applied to a connected, two-stage / one-stage concentrically wound coil. FIG. 1 is a front view of a stator in the first embodiment, FIG. FIG. 4 is a front view of a stator according to a second embodiment, FIG. 4 is a developed view of the same coil, FIG. 5 is a front view of a stator showing a modification of the second embodiment, FIG. Fig. 8 is a front view of the stator according to the third embodiment, Fig. 8 is a developed view of the coil, Fig. 9 is a front view of the stator according to the fourth embodiment, Fig. 10 is a developed view of the coil, and Figs.
Fig. 12 is a front view of the stator according to the fifth embodiment, and Fig. 12 is a developed view of the coil. Fig. 13 shows three-phase four- FIG. 14 is a front view of a stator showing an embodiment of the present invention applied to a connection, two-stage / two-stage concentrically wound coil, and FIG. 14 is a developed view of the coil. Figure 15 shows three-phase two-pole-2 FIG. 16 is a front view of a stator showing an embodiment of the present invention applied to a connected, two-stage / two-stage concentrically wound coil, and FIG. 16 is a developed view of the coil. 17 to 20 are partially enlarged cross-sectional views showing various aspects of the arrangement of the crossover wires and the connection portions between coil phases in the present invention. FIG. 21 is a front view of a conventional stator, and FIG. 22 is a developed view of the coil. S: stator core, 1 to 36: slot number, U _{1 to} U ₄
…… U-phase coil, V _{1 to} V ₄ …… V-phase coil, W _{1 to} W ₄ …
… W phase coil, U _l , V _l , W _l … Crossover, U _t , V _t , W _t … Lead wire, _Tu , T _v , T _w … Insulated tube, N, N ₁ , n ₂ ...... neutral point connection portion, I _n ...... insulating _{coating, C, C 1, C 2} ...... coil interphase connecting part, I _p ...... interphase insulator.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-55-58756 (JP, A) JP-A-60-32534 (JP, A) JP-A-59-178934 (JP, A) 23873 (JP, U) Fully open 1983-49551 (JP, U) Fully open 57-63460 (JP, U)

Claims (4)

(57) [Claims] A plurality of coils arranged in different phases along a radial direction for each phase concentrically on a core end face; An armature of a rotating electric machine comprising an insulator provided, connecting a crossover wire drawn out for each coil of each phase to a neutral point connection portion, and inserting these into an insulating coating to form a coil phase connection portion. In the winding, the insulating coating is disposed on any one-phase coil, and one end of the insulating coating is
Of the crossover wires drawn from each phase coil, the coil is located at a position between adjacent in-phase coils on the same circumference as the coil.
At least a crossover from a different-phase coil adjacent to the coil on which the insulating coating is arranged crosses the interphase insulator between the different-phase coil and the one-phase coil at the portion without the insulator attached. And inserted into the insulating coating, and connected to the neutral point connection portion in the insulating coating, and the one-phase coil-side crossover on which the insulating coating is arranged remains in a state where no insulator is attached. Wherein the armature winding is inserted into the insulating coating from one end thereof and connected to a neutral point connecting portion in the insulating coating. 2. The electric machine of a rotating electric machine according to claim 1, wherein the crossover wires of the coils of each phase are drawn out from the side of the maximum pitch coil when the coils are formed by multi-stage concentric winding. Child winding. 3. The armature winding of a rotating electric machine according to claim 1, wherein the connecting wires of the coils of each phase are drawn from the outermost coil sides. 4. The crossover on the one-phase coil side on which the insulating coating is arranged and the crossover from a different-phase coil adjacent to the coil are inserted and arranged in grooves provided in the interphase insulator. The armature winding of a rotating electric machine according to claim 1, wherein: