JPH10112948A - Bipolar armature winding of rotating electric machine and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of coils and insulators in slots, and facilitate the insertion of a coil into a machine and the insertion of paper between phases, by setting the number of windings of each coil to mutually different values among the slots for every pole and every slot so that the electromotive force of the winding of each coil housed in a specified slot may be in roughly sine wave distribution. SOLUTION: The number of slots of every pole and every phase is 36/(3×2)=6, and each pole winding of each phase is single-phase coaxial winding consisting of (6/2) = three pieces of consecutive coils distributed in coaxial winding. These three pieces are ranged in line with the consecutive coils so as to constitute pole winding, and as a whole, this comprises coils in the shape of a total of six coaxial winding of pole windings U1 and U2 of U phase, pole windings V1 and V2 of V phase, and pole winding W1 and W2 of W phase. For example, the winding U1 of the first pole of the U phase is constituted by making the coils (coil pitch 17) housed in #1-#18, the coils (coil pitch 15) housed in #2-#17, the coils (coil pitch 15) housed in #2-#17, and the coils (coil pitch 13) housed in #3-#16 continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature winding having a concentric winding coil in a rotating electric machine and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, in an AC machine, particularly a three-phase induction motor, when an armature winding is formed by concentric windings, for example, an armature winding of three-phase four poles and 48 slots is a development view of the armature winding. The configuration is as shown in FIG. 11 and FIG. 12 which is a coil arrangement diagram showing a housed state of the armature winding. Here, FIG.
A dotted line 1 indicates a coil side inserted over the slot (opening side), a solid arc in FIG. 12 indicates a coil end of each coil, and a black dot indicates a coil side. In the figure, numbers 1 to 48 are slot numbers (hereinafter simply referred to as # 1 to # 48), U1 to U4 are U-phase pole windings, and V1 to V4.
V4 indicates a V-phase pole winding, and W1 to W4 indicate W-phase pole windings.

Here, focusing on the U-phase first pole winding U1, only one coil is inserted into each of the concentric winding coils # 1 to # 12 in each slot. On the other hand,#
The concentric winding coils # 2 to # 11 and # 3 to # 10 have one coil of another phase (here, V4 and W
Inserted with 1). Usually, the number of turns of the coils in # 2, # 11 and # 3, # 10 is the same,
1, half of the # 12 coil. The same applies to the number of turns of all other concentrically wound coils, and the relationship is twice or half.

Japanese Patent Publication No. Sho 51-28125, entitled "Method of Wrapping Concentrically Wound Coil", discloses a housing state of an armature winding as shown in FIG. 14, the number of turns of each coil is not specified in detail. Normally, the number of turns of a coil in which a coil of another phase is inserted in a slot is half of the number of turns when only one coil is inserted in the slot. In general, the relationship is as follows. However, when the number of turns for each slot is twice or half as described above, the waveform of the magnetomotive force of the winding does not show a sinusoidal distribution, so that there are many harmonics and the efficiency and power of the motor are high. There is a drawback that the rate deteriorates or the electromagnetic vibration noise increases.

On the other hand, for the purpose of improving the efficiency and power factor of an electric motor or reducing electromagnetic vibration noise, the number of windings of one winding is changed for each slot, and the magnetomotive force distribution of the winding is changed. May form a sine wave winding that attempts to approximate a sine wave. As an improvement of this, JP-A-6-26
No. 1479, entitled "Armature Winding", employs a sine wave winding and a two-layer concentric winding as the winding system.

FIG. 16 is a development view of a coil in which three phases, four poles and 48 slots are used, and the number of parallel circuits is doubled. Here, the number of slots q for each pole and each phase is q = 48 / (3 × 4). = 4. The pole winding of each phase is a two-layer concentric winding consisting of four continuous coils distributed in concentric windings. These four are connected to a continuous coil to form a pole winding, and as a whole, a U-phase pole winding U1, U2, U3, U4 and a V-phase pole winding V1, V2,
V3, V4 and W-phase pole windings W1, W2, W3, W4, a total of 12 concentrically wound coils.
In FIG. 16, coils are accommodated in slots # 5 to # 16, and the coil pitch of each pole winding in this case is 11, 9, 7, and 5, respectively. For example, the U-phase first pole winding U1 includes a coil (coil pitch 11) stored over # 5 to # 16, a coil (coil pitch 9) stored over # 6 to # 15, and # 7 to # 14. The coil (coil pitch 7) housed over # 8 to # 13 and the stored coil (coil pitch 5) over # 8 to # 13 are sequentially stacked. Similarly, the other poles of the U-phase and the coils of the other phase are configured by four types of four coils having a coil pitch of 11, 9, 7, and 5 in series.

FIG. 17 shows the number of turns of the coil for each slot. This figure only shows the arrangement of the coils housed in each slot, and does not show the vertical relationship of the coils. The number of turns of the coil housed in the slot is the same as the conventional one, and the number of coils of each phase is twice. U
Focusing on the phases, in FIG. 17, the U-phase first windings U1 are distributed in # 5 to # 8 and # 13 to # 16, and the number of turns is 2 respectively.
8, 21, 13, 5 and 5, 13, 21, 28 to form concentric windings. The U-phase second pole winding U2 is distributed in # 17 to # 20 and # 25 to # 28, and the number of turns is 28, 21, 13, 5 and 5, 1, respectively.
The concentric windings are formed by changing them to 3, 21, and 28. Looking at each slot in which the U-phase winding is accommodated, in # 1 to # 8, the number of windings is 5, 13, 2
1, 28, 28, 21, 13 and 5, which is different from a normal winding, whereby the magnetomotive force distribution of the winding can be made substantially sinusoidal.

In addition, because of the double-layer concentric winding winding system,
As can be seen by focusing on the portions # 1 to # 8 in FIG. 17, the total number of turns of the coil stored in each slot is 33, 33, 34, and 34. It can be seen that it is uniform in almost any slot, and the slot cross-sectional area is effectively used.

Here, the number of turns in each slot is such that the magnetomotive force distribution by the winding is substantially sinusoidal, and the harmonic winding coefficient is 0.
It has been determined to be close to that described in, for example, Shibaura Review, No. 8, No. 8, "Theoretical Study of Induction Motor Abnormal Phenomena" (published by Tadayoshi Okawa in August 1934). I have. As described above, FIG. 18 shows the vertical arrangement relationship of each phase coil in the winding shown in FIG. 17 together with the number of turns.

FIG. 19A shows the magnetomotive force distribution when the sine wave winding is applied, and FIG. 19B shows the magnetomotive force distribution when the normal winding is used. FIG. 20 shows the winding coefficients of the sine wave winding corresponding to FIG. 19A and the non-sine wave winding corresponding to FIG. 19B. As can be seen from FIGS. 19 and 20, the use of the sine wave winding makes the magnetomotive force distribution closer to a sine wave, and the harmonic winding coefficient can be greatly reduced.
In FIG. 16, the double number of parallel circuits means that the external terminal U
It means that the number of parallel pole windings formed between −X is 2.

FIG. 21 shows the arrangement including the vertical relationship in the slot of each phase coil and the number of turns in the winding configuration shown in FIG. As shown in FIG. 21, the U-phase all-pole windings U1 to U4 are housed in the slots as lower coils, then the V-phase all-pole windings V1 to V4 are set as lower coils, and finally the W-phase All the windings W1 to W4 are stored as upper coils. With the two-layer concentric winding as described above, the one-phase all-pole winding can be inserted at the same time, so that the winding can be easily stored and the winding can be inserted into the slot by a machine. Therefore, according to this winding configuration, the effect of a sine wave winding similar to that of a lap winding can be exhibited, and mechanical insertion of an insulator can also be performed.

In this winding, by changing the number of turns of one slot for each slot, the winding distribution is changed to make the magnetomotive force waveform of the winding substantially sinusoidal, thereby improving various characteristics of the motor. Was.

[0013]

However, FIG. 11 and FIG.
In the conventional concentric winding winding method as shown in FIG. 5, the number of turns per slot is twice or half, and since the magnetomotive force waveform of the winding does not have a sine wave distribution, many harmonics exist. As a result, the efficiency and power factor of the motor deteriorated or the electromagnetic vibration noise increased.

Further, in the two-layer concentric winding method using a sine wave winding in Japanese Patent Application Laid-Open No. Hei 6-261479 shown in FIG. 16 in which these disadvantages are improved, as shown in FIG. The difference in the number of turns
Out-of-phase coils are arranged in all slots (# 1 to # 48), and an insulator is inserted into all slots (here, 48) in order to maintain insulation between upper and lower out-of-phase coils in the slots. Required, which greatly increases winding man-hours.
Also, slots (for example, slot numbers 1, 4, 5, 8, 9, 12, 13, 1
6,17,20,21,24,25,28,29,3
2,33,36,37,40,41,63,64,48
There are 5 turns and 28 turns), so it is necessary to change the dimensions of the insulator inserted between the upper and lower coils for each slot, and it is necessary to prepare various types of insulators.

Further, if the number of turns of the coil inserted in the slot is small, the inserted coil or the insulating material will not fit inside the slot, and it will be difficult to insert the coil in the next step manually or by machine. In some cases, the insulator stored in the slot may move, resulting in a decrease in quality. In addition, it is difficult to insert the interphase paper because of the two-layer winding, and furthermore, the number of windings of each pole is q and each dimension is different, so that q windings are required. is there.

An object of the present invention is to reduce the number of coils constituting a single-pole winding, to reduce the type and number of insulators in a slot, and to easily insert a coil into a machine or insert a sheet of paper. It is an object of the present invention to provide a two-pole armature winding for a rotary electric machine and a method for manufacturing the same.

[0017]

According to the first means of the present invention, the number of slots q for each pole and each phase is set to 4 or more, and each coil has a single homocentric winding distribution in each slot. The number of turns of each coil is set to a mutually different value between slots for each pole and phase so that the magnetomotive force of the windings is housed and has a substantially sinusoidal distribution.

In such a winding configuration, firstly, the number of coils of the pole winding is １ ／ of q, the number of coil windings is reduced, and secondly, a slot into which a different-phase coil is inserted. Thirdly, the mechanical insertion of the coil is facilitated, and fourthly, the insertion of the interleaf paper to be inserted into the coil end is facilitated.

According to the second means of the present invention, each of the three phases has a first phase.
The coils forming the pole windings are distributed and arranged in each divided region that divides the entire slot region into three, and the next pole winding of each phase is a region that divides the front slot region into three and corresponds to the front pole in order. Each divided region is in a state of being sequentially distributed and arranged in divided regions spatially shifted by π in mechanical angle.

In this way, the insertion of all windings can be completed by two (equal to the number of poles) insertion operations using the coil insertion machine, and the number of operation steps is reduced. Further, since the average winding length of the coils of the second group is reduced, the coil end dimensions after inserting all the coils are substantially the same as those of the first group. Then, the winding impedance is balanced between the phases. (FIGS. 6, 7, 8 of the embodiment) In the third means, in the above-mentioned two-pole armature winding, the number of windings of each coil is changed from the outermost to the innermost to N1, N2, N3,.
When (q / 2), N1>N2> N3... N (q /
2).

By using this, the number of parallel circuits can be doubled for two poles, and the degree of freedom in design is improved. (FIGS. 1, 5, 6, 7, and 8 of the embodiment) In the fourth means, in the two-pole armature winding, the number of turns of each coil q is changed from the innermost to the outermost to N1, N2, N3,.
... N (q / 2), N1>N2> N3 ... N (q
/ 2).

By using this, the number of parallel circuits can be doubled for two poles, and the degree of freedom in design is improved. (Embodiments FIGS. 9 and 10) In the fifth and sixth means, in the two-pole armature winding, the lead of the coil closest to each terminal is connected to a coil having a small number of turns.

In the coil closest to the terminal to which the surge voltage is applied most, the number of turns in the same phase is the least, and the voltage difference between the start and end of the coil between the same phases in the slot can be reduced. The insulation breakdown of the coil can be protected. In the next slot, the number of turns is smaller than that of the large coil, and the voltage difference between the start and end of winding of the in-phase coil can be reduced. (FIGS. 1 and 6 of the embodiment) The seventh means is characterized in that an operation of inserting the bipolar armature windings in order of each group is included. (FIGS. 7, 8, and 10 of Examples)

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. In the drawing, numbers 1 to 36 are slot numbers, U1 to U2 are U-phase pole windings, V1 to V
Reference numeral 2 denotes a V-phase winding, and W1 and W2 denote W-phase windings.

In this embodiment, the three-phase two-pole slot number 3
6. The number of winding parallel circuits is doubled. FIG. 1 is an exploded view of the armature winding.
With / (3 × 2) = 6, each pole winding of each phase is a single-layer concentric winding consisting of (6/2) = 3 continuous coils distributed concentrically. These three are connected to a continuous coil to form a pole winding, and as a whole, a total of a U-phase pole winding U1, U2, a V-phase pole winding V1, V2, and a W-phase winding W1, W2 is obtained. It is composed of six concentric wound coils.

The coil pitch of each coil is 17, 1
5 and 13. For example, the U-phase first pole winding U1 is:
The coil (coil pitch 17) stored over # 1 to # 18, the coil (coil pitch 15) stored over # 2 to # 17, and the coil (coil pitch 13) stored over # 3 to # 16 are made continuous. It is configured. Similarly, the other windings of the U phase and the windings of the other phase are configured by three types of three coils having coil pitches of 17, 15, and 13 being continuous.

FIG. 2 shows the number of turns of the coil for each slot. This figure only shows the arrangement of coils housed in each slot. The number of turns of the coil housed in the slot is different from the conventional one.
In FIG. 2, the U-phase first pole winding U1 has slots # 1 to # 1.
# 3 and slots # 16 to # 18, and the number of turns of one coil is changed to 38, 32, 25, 25, 32, 38 to form concentric windings. Further, the U-phase second pole winding U2 has slots # 19 to # 21.
And slots # 34 to # 36, and the number of turns is 3
8, 32, 25, 25, 32, 38, and so on to form concentric windings.

Looking at each slot in which the U-phase winding is accommodated, the number of turns in slot # 1 to # 3 is 3 in U1.
8, 32, 25 and distribution (hereinafter simply 38, 32, 25, 2
5, 32, 38), and the degree of change is different from the case of the conventional sine wave winding shown in FIG.
Because of the stepwise change, the magnetomotive force distribution of the winding can be made substantially sinusoidal like the conventional sinusoidal winding. FIG. 3A shows the magnetomotive force distribution when the sine wave winding of the present embodiment is applied, and FIG. 3B shows the magnetomotive force distribution when the normal winding (non-sine wave winding) is used. FIG. 4 shows the respective winding coefficients in comparison. As can be seen from FIGS. 3 and 4, by using the sine wave winding of the present embodiment, the magnetomotive force distribution approaches a sine wave and the harmonic winding coefficient can be greatly reduced.

FIG. 5 shows the positional relationship between the coils of each phase and the number of turns in the winding configuration shown in FIG. Here, the solid arc in FIG. 5 represents the coil end of each coil, and the black dots represent the coil sides. Among the large, medium, and small black spots, the large black spot indicates 38 turns in which one coil is arranged in the slot and has the largest number of turns, and the middle black dot similarly indicates that the number of turns is 3 in the middle.
Two turns are shown, and a small black dot similarly shows a small number of turns of 25 turns.

As shown in FIG. 5, first, a U-phase all-pole winding U
1 to U2 are stored in the slots, then the V-phase all-pole windings are V1 to V2, and finally the W-phase all-pole windings W1 to W2.
Go through the order of storing each. When the single-layer concentric winding is used, the single-phase all-pole winding can be inserted into the slot at the same time, so that the winding can be easily stored and the coil can be inserted into the slot by a machine.

Further, as shown in FIG. 5, the coil arrangement of this embodiment is a single-layer concentric winding, so that the insulation between the different-phase coils is smaller than that of the conventional winding method using two-layer concentric winding of a sine wave winding. Becomes unnecessary, and the number of winding storage man-hours is greatly reduced. Also, the number of coils is two more than the conventional (4 poles, 48 slots)
Since the number of poles is 36, three (q × １ ／) coils are sufficient, and the number of coil winding forms can be reduced.

Since the coil volume at the intersection of the coil ends due to the insertion of the next-phase coil is about half that of the conventional single-layer concentric winding, molding can be performed with a small molding force, and coil damage is reduced, and In addition, insertion of the next phase coil becomes easy. Furthermore, the slot that intersects with the next phase coil in the adjacent slot has a smaller number of turns and a smaller coil cross-sectional area, so that the coil insertion / forming workability of the next phase is improved.

Incidentally, the winding configuration shown in FIG.
Two series pole winding groups are connected in parallel between X, and two parallel winding circuits are provided. Further, in the number of coil turns in the present embodiment, the winding coefficient of the fundamental wave is 0.962, and the winding coefficient of the sine wave winding shown in FIG.
6, the motor characteristics are improved by about 0.6%.

FIG. 2 shows an example of the number of turns for each slot in the above-described winding configuration. In the case of a slot in which a U-phase winding is housed, for example, slot # 1
From # 3 to # 3, the number of turns is N3 (= 38), N2 (=
32), N1 (= 25), N1, N2, N3 (where,
N3 <N2 <N1). That is, the outermost number of turns of the concentric coil is set to N1, and N
2, N3.

(Second Embodiment) A second embodiment will be described with reference to FIGS. In this embodiment, FIG.
In the same single-layer concentric winding as in the embodiment, three pole windings corresponding to the same pole of each phase are distributed and arranged in each divided region obtained by dividing all slot regions of the armature core into three. As shown in FIG. 7, for example, the U-phase first pole winding U1 is # 1 to # 18.
In addition, the V-phase first pole winding V1 is disposed in a divided region of # 25 to # 6, and the W-phase first pole winding is disposed in a divided region of # 13 to # 30.

U2, V2, and W2, which are the second pole windings of the U, V, and W phases, are also regions obtained by dividing all the slot regions of the armature core into three, and the former first pole winding. Each divided area corresponding to the line group is spatially, that is, a mechanical angle of 2π / p in the circumferential direction.
(P is the number of poles).

The order of inserting the coil groups into the slots is as follows. First, the first pole windings U1, V1, and W1 of each phase separated by 2π / 3 in mechanical angle are simultaneously inserted into the first three divided regions, and then the second poles of each phase separated by 2π / 3 are also inserted. The windings U2, V2, and W2 are simultaneously inserted into the second divided regions. As a result, the insertion of all coils is completed by the same number of times as the number of poles, that is, two insertions, and the process proceeds to a molding step.

Further, a procedure for inserting each coil in the second embodiment will be described. First, in the first coil insertion operation, a first group is formed by setting the three-phase first pole windings U1, V1, and W1 as one set, and the coils are set in a coil insertion machine (not shown) and inserted simultaneously into the slots. can do. A total of 9 for each of the three phases constituting the windings of the first group.
As shown in FIG. 7, all the coil sides of the individual coils are housed in the bottom of the slot. The first pole windings U1, V1, and W1 are separated from each other by an electric angle of 240 °, and the first pole and the second pole are connected by an electric angle of 18 °.
Since the coils are set in a coil insertion machine (not shown) so as to be separated by 0 °, no coils are simultaneously inserted into the same slot, and the coils do not interfere with each other when inserted.

Next, after shortening the average winding length of the three-phase second pole windings U2, V2, and W2 by several percent to several tens of percent from the first pole winding, a second coil insertion operation is performed. These coils of the second group are set in a coil inserter (not shown) and inserted into slots at the same time. In this case, a total of 9 coils of 3 phases each constituting these windings are separated from each other by an electrical angle of 240 ° as described above, as is clear from FIG.

As described above, in this embodiment, the insertion work of all the windings can be completed by two (equal to the number of poles) insertion work using the coil insertion machine, and the number of work steps is reduced. Further, since the average winding length of the coils of the second group is reduced, the coil end dimensions after inserting all the coils are substantially the same as those of the first group.

The arrangement relationship of the above-described armature windings based on the arrangement relationship of the coils and the insertion order is such that the coil ends of each phase are arranged in order in the radial direction for each pole, and the poles are arranged in the same annular region. Since the windings are arranged in three phases, the winding impedance is balanced between the phases. According to the second embodiment, the winding can be mechanically inserted because of the single-layer concentric winding.

(Third Embodiment) A third embodiment will be described with reference to FIG. This is an example in which the number of two-pole slots is 48 and the number of parallel circuits of the winding is double. Here, each phase is a pole winding U
1 to U2, V1 to V2, and W1 to W2 respectively, the number of parallel winding circuits can be clearly doubled between the terminals UX. The rest is the same as the configuration of FIG. Therefore, by using this embodiment,
With two poles, the number of parallel circuits can be doubled, and the degree of freedom in design is improved.

In this embodiment, it goes without saying that the number of parallel circuits can be increased by one. (Fourth Embodiment) A fourth embodiment will be described with reference to FIGS. FIG. 9 shows an example in which the number of two-pole slots is 36 and the number of parallel circuits is twice. The number of slots q for each pole and phase is
With 36 / (3 × 2) = 6, each pole winding of each phase is a single-layer concentric winding composed of 6 × (１ ／) = 3 continuous coils distributed in concentric windings. These three are connected to a continuous coil to form a pole winding, and as a whole, U-phase pole windings U1, U2,
The V-phase pole windings V1, V2 and the W-phase pole windings W1, W2 are configured in a total of six concentric windings.

This embodiment shows that it is possible to further reduce the copper dose of the coil in the case of the number of slots of 36 so as to obtain the effect of the sinusoidal winding. The coil pitch of each pole winding is 17, 15, 1 as shown in FIG.
3. For example, the U-phase first pole winding U1 has # 1 to #
Coil stored over 18 (coil pitch 17)
And a coil (coil pitch 15) housed over # 2 to # 17 and a coil (coil pitch 11) housed over # 3 to # 16.
Similarly, the other windings of the U phase and the windings of the other phase are configured by three types of three coils having coil pitches of 17, 15, and 13 being continuous.

Focusing on the U-phase, the U-phase first pole winding U1 in FIG.
To # 18, forming a concentric coil.
The U-phase second pole winding U2 is provided in slots # 19 to # 21.
And slots # 34 to # 36 to form a concentric coil.

For the number of turns for each slot, U
Taking the slots in which the phase windings are stored as an example, in slots # 1 to # 3, the number of turns is N1, N2, N3, and #
16 to # 18, N3, N2, N1 (where N3 <N
2 <N1), and the number of turns on the innermost side of the concentric coil is set to N1, and N2 and N3 are sequentially changed outward.

A modification of the fourth embodiment will be described with reference to FIG. This is an example in which the number of two-pole slots is 36 and the number of parallel circuits of the winding is one or two. Here, since the pole windings of each phase are composed of two each of U1 to U2, V1 to V2, and W1 to W2, the number of parallel circuits of the windings is clearly doubled between the terminals UX. It is possible. Therefore, by using this embodiment, the number of parallel circuits in two poles is two.
It can be doubled, and the degree of freedom in design is improved.

In the embodiments described so far, the three-coil insertion method and the two-coil insertion method with two poles and 36 slots and two poles and four slots have been described, but the present invention is not limited to these. Of course, the present invention can be applied to other numbers of poles and slots.

In the embodiment of the present invention, it is possible to manufacture a coil in which the number of turns is automatically changed by setting the number of turns in the winding machine to an arbitrary value in advance. In addition, the winding can be stored by a machine.

In FIG. 1, the coil winding starts from the U-phase terminal U at # 16 and # 21, and the number of coil windings is 25,
No out-of-phase coil is arranged in the slot. Similarly, at the start of coil winding of each of the terminals V and W, # 4, 9,
28, 33, and the coil is started to be wound from the slot having the number of turns of 25 each.

Generally, there is no problem when the rotating electric machine is driven by a commercial power supply. However, when the rotating electric machine is driven by an inverter power supply, a surge voltage higher than the power supply voltage due to the capacitance of a power supply cable between the rotating electric machine and the inverter. This surge voltage is applied to the windings of the rotating electric machine, and in the worst case, there is a possibility that the windings will be broken down. In this case, particularly, the highest voltage is applied to the coil near the power supply terminal, and there is a possibility that dielectric breakdown may occur not only between different phases but also between the same phases.

In the single-layer concentric winding, only the in-phase coil is arranged in the slot. However, a considerable voltage difference occurs between the start and end of the coil winding in the slot. In FIG. 1, the beginning of coil winding from each terminal is the coil with the smallest number of windings, and is sequentially connected to the coil with the largest number of windings. Therefore, in the coil closest to the terminal to which the surge voltage is most applied, the number of turns in the same phase is the least, and the voltage difference between the coil start and end in the same phase in the slot can be reduced, and the coil by the surge voltage Can be protected from dielectric breakdown. In the next slot, the number of turns is smaller than that of the large coil, and the voltage difference between the start and end of winding of the in-phase coil can be reduced.

Here, when the armature winding is operated in double connection, the number of turns is minimized in the slot closest to each terminal, so that dielectric breakdown between the in-phase coils due to surge can be reduced. Further, if the connection is made as shown in FIG. 6, the same applies to the 1-time Y connection and the △ connection.

[0054]

As described above, according to one embodiment of the present invention, even in the case of a winding configuration having a coil distribution in which the magnetomotive force has, for example, a substantially sinusoidal distribution, the present invention is not limited thereto.
The number of coils constituting the pole winding is の of the number of slots per pole and phase, and the number of coil windings is reduced. Is also gone. In addition, it is easy to insert the coil mechanically, furthermore, it is easy to insert the interleaving paper inserted between the different phase coils, and it is possible to insert it to the root of the coil end. A method can be provided.

[Brief description of the drawings]

FIG. 1 is a development view of an armature winding according to a first embodiment of the present invention,

FIG. 2 is an explanatory view showing the number of turns of a coil in a slot in the first embodiment;

FIG. 3 is a diagram showing a magnetomotive force distribution of a winding;

FIG. 4 is a contrast diagram of a winding coefficient,

FIG. 5 is a coil arrangement diagram showing a first embodiment,

FIG. 6 is a development view of an armature winding showing a second embodiment,

FIG. 7 is a coil arrangement diagram showing a second embodiment,

FIG. 8 is a coil arrangement diagram showing a third embodiment,

FIG. 9 is a coil arrangement diagram showing a fourth embodiment,

FIG. 10 is a coil layout diagram showing a modification of the fourth embodiment;

FIG. 11 is a development view of an armature winding showing a conventional concentric winding;

FIG. 12 is a coil arrangement diagram showing a conventional concentric winding;

FIG. 13 is a coil arrangement diagram showing a conventional concentric winding;

FIG. 14 is a coil arrangement diagram showing a conventional concentric winding;

FIG. 15 is a development view of another armature winding showing a conventional concentric winding,

FIG. 16 is a development view of an armature winding showing a conventional sine wave winding,

FIG. 17 is an explanatory diagram showing the number of turns in a slot in a conventional sine wave winding,

FIG. 18 is a coil arrangement diagram of a conventional sine wave winding,

FIG. 19 is a diagram showing a magnetomotive force distribution of a winding;

FIG. 20 is a contrast diagram of the winding coefficient,

FIG. 21 is a coil layout diagram showing a conventional sine wave winding.

[Explanation of symbols]

U1 to U2: U-phase winding, V1 to V2:
V-phase winding, W1 to W2... W-phase winding, U, V, W, X,
Y, Z... Terminals, 1 to 48... Slot numbers.

Claims (7)

[Claims] 1. The number of slots for each pole and phase is set to q,
An armature winding in which one winding corresponding to one pole includes at least one coil having a different number of windings from the other and includes a plurality of coils having different coil pitches, and these coils are housed in respective slots. In the above, the number of slots q is set to 4 or more, and each of these coils is housed in each slot so as to form a single homocentric winding distribution, and each coil is wound so that the magnetomotive force of the winding becomes a substantially sinusoidal distribution. A two-pole armature winding of a rotating electric machine, wherein the number of times is set to a mutually different value between slots of each pole and each phase. 2. A coil forming a first pole winding of each of the three phases is dispersedly arranged in each divided region obtained by dividing the entire slot region into three, and a next pole winding of each phase is sequentially arranged in a front slot region. 3. The divided region which is divided into three and which is sequentially distributed and arranged in divided regions which are spatially shifted by π in mechanical angle from each divided region corresponding to the front pole. A two-pole armature winding of the rotating electric machine according to claim 1. 3. When the number of turns of each coil is N1, N2, N3, N4,... N (q / 2) from the outermost side to the innermost side, N1>N2>N3> N4. / 2n), wherein the two-pole armature winding of the rotating electric machine according to claim 1. 4. When the number of turns of each coil is N1, N2, N3, N4,... N (q / 2) from the innermost to the outermost, N1>N2>N3> N4. 2. The two-pole armature winding of the rotating electric machine according to claim 1, wherein 5. The two-pole armature winding of a rotating electric machine according to claim 1, wherein winding of the coil from each terminal is started from an innermost coil having a small number of turns. 6. The two-pole armature winding of a rotating electric machine according to claim 2, wherein the coil closest to each terminal is led out from a coil having a small number of turns. 7. A plurality of coils, wherein the number of slots q for each pole and each phase is set to 4 or more, one winding corresponding to one pole includes at least one coil having a different number of windings from the other and coil pitches are different from each other. Coils, each coil is accommodated in each slot, the number of coils of one winding is set to (q × １ ／), and each coil is concentric with each slot in a single layer. In a method of manufacturing an armature winding having an integral slot winding configuration housed in a winding distribution, a minimum coil pitch is set in advance to at least q by the number of slots, and a coil for at least two poles is inserted into a slot. Storage corresponding to the first pole for three phases 3
And the three windings corresponding to the second poles of the three phases as one group, and the average winding length of the three windings of the second pole is defined as the first winding. A method for manufacturing a two-pole armature winding of a rotating electric machine, comprising: setting the length of the winding to be shorter than the three windings of the poles, and performing the operation of inserting the coil into the slot in the order of each group.