JPS59165935A - 3-phase flat coil - Google Patents

Abstract

PURPOSE:To increase the output by superposing a plurality of discs and connecting them in series. CONSTITUTION:Copper plates 2 of the same shape in coil segments are welded at both front and back sides through an insulating plate 3 having a hollow part 3c at the center, insulating silicone resin 15 is flowed to the gap of the plates 2 to fix the plates 2, thereby forming a disc. An insulating projection 3a which is slightly projected from the outer periphery is formed on part of the plate 3, and output side terminals a1-c2 and crossover terminals are provided on the front and back sides of the projection 3a. Such discs 7 are connected in series, the output side terminals a1-c2 of the first disc 51 are connected to an output side wiring member 54 as the outputs of 3-phase coils through output wirings 56, and crossover wiring member 4 is connected to the crossover terminal of the third disc 53.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-phase AC coil used, for example, in a rotating electric machine. Regarding.

Conventionally, in a three-phase AC coil, one of the three phases was wound in the opposite direction to simplify terminal processing.

Figure 1 is a winding diagram showing the conventional three-phase AC coil winding method, in which the B-phase coil is wound in the C-phase and in the opposite direction to the C-phase. This makes it easier to group the terminals together.

However, in order to realize a printed coil using the conventional winding method as shown in Fig. 1, since the winding direction of the b-phase coil described above is opposite, the b-phase coil is different from the a-phase coil and the C-phase coil. There is a drawback that they intersect at the X part, and this intersecting part X must be insulated.

This will be explained in detail below.

Numbers 1 to 12 in FIG. 1 indicate the arrangement position numbers of the coil pieces. Strictly speaking, printed coils do not have slots (coil storage grooves) unlike link-shaped cores, but for the sake of clarity, the positions of the coil parts corresponding to numbers 1 to 12 are considered to be slots. I decided to number them. In the following description, this is
) number.

In FIG. 1, a disk-shaped printed coil is shown developed into a strip. Therefore, lines L1 to L2 indicate the outer circumferential side of the effective portion of the disk-shaped printed coil, and lines L3 to L4 indicate the inner circumferential side of the effective portion of the disk-shaped printed coil.

This relationship becomes clear when compared with FIG. 8, which shows the outer shape of an actual printed coil.

Now, in FIG. 1, the coil piece at position Pl is wired on the front side of the disk, turned back on the inner peripheral side, and wired on the back side of the disk at position P2.

In this way, P3 and P4 are similarly wired on the front side of the disk, and P5 and P6 are wired on the back side.

In this case, among the coil pieces in the ineffective portion on the inner peripheral side, Pl is wired on the front side, and P8 is wired on the back side. P9 is the boundary between the front and back, which passes through the inner circumferential end L5 of the disk in FIG.

As described above, there is a part to be wired on the front side and a part to be wired on the back side. In Figure 1, the part wired to the front is (0).
The part to be wired on the back side is marked with (B).

As is clear from this, a portion X is created where the front sides or the back sides intersect. These parts must be three-dimensionally intersected to insulate the intersecting coil pieces from each other, but insulating them in this way is difficult and increases the size in the direction perpendicular to the plane of the paper.

Moreover, in the wiring connection shown in FIG. 1, the crossing portions X are distributed over the entire circumference on the inner and outer circumferential sides of the printed coil.

In order to solve this problem, it is possible to wind a coil piece (magnet wire) with an insulating coating on its surface, but even with this, the intersection part It will no longer be possible to produce items with a similar shape.

An object of the present invention is to provide a three-phase flat coil with as few intersecting parts as possible, having the intersecting parts concentrated in approximately one place, and having a large output by stacking a large number of disks in layers. , FIG. 2 shows a winding body similar to that shown in FIG. 1 formed by a winding method devised in the course of the present invention and adopted by the present invention, and expanded in the same manner as in FIG. 1.

In the case shown in Fig. 2, the winding direction of the b-phase coil is opposite to the winding direction of the b-phase coil in Fig. 1, and the a-phase, b-phase, C
All of the phases are wound in a wave pattern in the same direction. Instead, the polarity of the end portion of the b-phase coil is reversed so that the direction of the current flowing through the b-phase coil shown in FIG. 1 is opposite to the direction of the current flowing through the b-phase coil shown in FIG. 2. In addition, in the figure ■
e indicates polarity.

That is, regarding the b-phase coil, the phase of the coil arrangement is shifted by 180° between FIG. 1 and FIG. 2.

In order to correct this phase shift, the positive and negative terminals of the b-phase may be replaced. That is, by replacing the terminal b■ in the b phase of FIG. 1 with bQ in FIG. 2, substantially the same phase can be obtained.

The electromotive force generated in a three-phase alternating current generator is shown as shown in Figure 3 in the case of a star connection, and as shown in Figure 3 in the case of a delta connection.
It is shown as shown in the figure. In FIGS. 1 and 2, (U) indicates - of the N pole or S pole on the field side.

If it is a pole and the number of pole logarithms is P, then 0°, 60°/P, 1
The slot is moved at an angle of 20°/P, . . . 360"/P.

3 and 4 show the directions in which electromotive force is generated at each angle in the a-phase, b-phase, and C-phase coils.

(In Figure 3, outward direction indicates current from positive to negative direction,
In the figure, clockwise rotation indicates current from positive to negative direction. ) In the conventional winding method shown in FIG. 1, an electromotive force is generated as shown in FIG. 3 in the case of a star connection and as shown in FIG. 4 in the case of a delta connection. The winding method shown in FIG. 2 used in the present invention also generates the same electromotive force as shown in FIG. 3 in the case of a star connection and as in FIG. 4 in the case of a delta connection.

In the winding method shown in Fig. 2, there appears to be an overlapping part in the Y part, but the front side of the coil piece is marked with (○), and the back side is marked with (B).
), all intersections occur on the front and back sides. Therefore, in the above Y portion, there is no need to interpose a special insulator between the coil pieces.

In addition, in the winding shown in FIGS. 1 and 2, some of the slots located on the front and back sides of the disc-shaped flat coil are not used. For example, the portions with slot numbers 2, 3, and 4 are wired only on the front side, and no coil pieces are wired on the back side of the disk corresponding to slot numbers 2, 3, and 4. Also, only the back side of the slot numbered 5°6.7 is used.

In reality, such a winding method that uses only one side, the front and the back, is extremely unreasonable. For this reason, the inventor
As previously proposed in Japanese Patent Application No. 57-57041,
It was wound as shown in Figure 5.

Figure 5 shows a comparative example of the coil of the present invention, which has 12 slots, and is a winding diagram when the number of pole pairs P = 2 and the number of slots is 12. A conductor is housed in a slot.

Nao, ite in Figure 5, a'l, bl, cl,, a2
, b2, and C2 indicate the output side terminal portion, ■e indicates the polarity, and (R) indicates the folded portion.

Also in FIG. 5, the portions of the coil pieces disposed on the front side of the disc-shaped flat coil are marked with (◯), and the portions wired on the back side are marked with (B). The line Ll-L2 is on the outer circumference side of the disk, and the lines L3 to L4 are on the inner circumference side of the disk.

As is clear from this Figure 5, slot number 10.1°
Coil pieces are arranged on both the back and front of the 1.12 part, from the back of the slot number 1'O, l'l, 1°2 part to the back of the slot number 1.2.3. must be wired to.

Along the circumferential direction of the outer circumferential side of the disk...7,8. Slots 10, 1° 1° 1 in slots lined up at 9°
In order to connect the three coils of phase a, phase b, and phase C to the back of panel 1 and 2. There are three portions X' that must be insulated from each other. In addition, in FIG. 6, IT, 2T, 3T, IOT, IIT, 12T
are transition terminals on the outer periphery of the coil pieces that are connected to the respective threaded coil pieces. Further, in FIG. 6, 2 is a coil piece, and 3a is an insulating plate protrusion.

Although crossing portions X' also occur in the previously proposed method, the number of crossing portions X' is small, and they occur concentratedly at -2 points on the outer periphery of the disc-shaped coil. In addition, the intersection part X'
is shown as a crossover wiring section 4 in FIG.

It is clear that this structure is simpler than the one in Figure 1, which has a large number of intersecting parts and is distributed over both the inner and outer peripheries, and furthermore, along the circumference. It is.

If the wiring connection in Fig. 5 is further schematically simplified and illustrated as shown in Fig. 7, for example, the broken line wiring is added as a crossover wire to form a neutral point output terminal (NT), and the terminal a
If I, b2, and C1 are used as three-phase AC output terminals, it becomes a star-connected three-phase flat coil, which can be used as an armature coil of a generator that extracts three-phase AC power.

In this way, the previously proposed method also has ideal characteristics as a three-phase flat coil, but if the wiring material is simply wound on the front and back sides of a single disk, the number of windings will be limited and it will take a long time. No output is expected.

Therefore, as described above, the present invention provides a three-phase flat coil having a multi-disc structure and a large output.

An embodiment of the present invention will be described below.

One disk in this example has the number of pole pairs P=8,
The number of slots is 48, and its outline is shown in Figure 8 (
(front) and Figure 9 (back).

As you can see from this outline drawing, the crossover wiring section (corresponding to the number 4 in FIG. 5) having the intersection shown in FIG. 5 is made of printed coiled veneer as shown in FIGS. It is not provided on the disc.

FIG. 10 shows a developed view of a single disk having no transition wiring portion, the number of pole pairs P=8, and the number of slots 48.

In this @10 diagram, 1 to 4°8 are slot numbers.

In addition, with only one (single plate) disk, the one in Fig. 10 can be connected at the crossover wiring section in the same way as in Fig. 5 to form one three-phase coil as shown in the schematic diagram in Fig. 11. (To finish this, use the slot numbers 4°6, 4°7, and
Terminal al' connected to the coil piece on the back side of 4°8,
b, l, , l and terminal a2' connected to the coil piece located on the back side of slot number 7 number 1, 2.3,
You can connect b2' and 02' at the crossover wiring section, but
This is not an embodiment of the present invention. FIG. 12 is a schematic diagram of the crossover wiring section 4. As shown in FIG.

Next, the structure of the single disk shown in FIGS. 8 and 9 will be described.

FIGS. 8 and 9 illustrate the front and back sides of a single-plate disk forming a part of a three-phase flat coil. In these figures, 2 is a copper plate, especially a copper plate, which forms a coil piece, and 3 is an insulating plate (such as a mica plate or an insulating resin plate), which has a hollow part 3c in the center. The copper plates 2 have exactly the same shape, and the front and back sides are welded through an insulating plate 3, and an insulating silicone resin 15 is poured into the gap between the copper plates 2 to fix the steel plate 2, thereby obtaining a disk.

Further, 3a is a part of the insulating plate 3 and protrudes slightly toward the outer periphery. A crossover wiring member 4, which will be described later, is provided adjacent to this insulating plate protrusion 3a.

Now, based on the technical explanation described above, one embodiment of the present invention, that is, a larger output can be produced by stacking a plurality of disk-shaped flat coils having the external shapes as shown in FIGS. 8 and 9. How to construct a flat coil will be described below.

It was previously explained that the single disk shown in FIGS. 8 and 9 can be illustrated in FIG. 10. A simplified diagram of what is shown in FIG. 10 is shown in FIG. 13.

Therefore, three disks as shown in FIGS.
When they are stacked and connected in series, they are connected as shown in FIG. As is clear from FIG. 14, there are six output terminals al, bl, C1, C2, b2, and C2 on one disk, and six transition terminals a1', b1', 01'
. exists in

Therefore, in order to connect three disks in series, the first
Output side terminal portions a1, b of the disk 51.

C1 is connected as the output of the three-phase coil to the output side wiring member 54 via the output wiring 56, etc., and the transition terminals a1', b, l...02' of the first disk 51 are connected to the output side wiring member 54 through the output wiring 56, etc. They may be connected to the output side terminals al, bl, . . . C2 of the disk 52.

In this case, the transition terminal portion a1' of the first disk 51
...02' and the output side terminal part a of the second disk 52.
・C2 are located back to back and can be connected as shown in FIG. 16, which will be described later. Further, the parts other than the insulating plate protrusion 3a do not need to be connected to each other, as shown in FIG. 15.

This FIG. 15 shows a cross section of a part of the outer circumferential side (XI
1 is a first disk, 52 is a second disk, and 53 is a third disk.

Further, FIG. 16 shows a cross section of a portion of the insulating plate protrusion 3a of the multiple disk (xx-xx cross section in FIG. 17).

In FIG. 16, C2 is one of the output terminals of the first disk 51. In FIG. Also, 02' is the third disk 53
This is one of the crossover terminal portions of , and is connected to the crossover wiring member 4 .

Reference numeral 55 denotes a spot weld to which the coil pieces 2 on the front and back sides of the insulating plate 3 are connected.

Further, 30 is an interlayer insulating member, and the material of this is the same as that of the insulating plate 3.
The interlayer insulating member 30 and the insulating plate 3 are different in shape. That is, Figure 15 and Figure 1
As is clear from FIG. 6, the glabellar insulating member 30 is conversely depressed in the portion where the insulating plate protrusion 3a of the insulating plate 3 protrudes.

As described above, by stacking a plurality of disks and connecting them in series, the output terminals φ1, φ2, φ of the output side wiring member
3, a relatively high voltage can be taken out, and the output can be increased. Furthermore, if this three-phase flat coil is used in an electric motor, a motor with a large output can be constructed.

Furthermore, the three-phase flat coil according to the present invention may be manufactured by pressing into the shape of the copper plate 2 and then bonding it to an insulating plate, or by etching a single cylindrical plate on the insulating plate to form a plurality of cylindrical coils. It can also be a radial conductor of a book. That is, the plurality of radially arranged copper plates 2 may be formed by printing wiring on the insulating plate 3 by etching, or may be formed by punching out a disk-shaped copper plate and pressing.

Alternatively, after winding a magnet wire having a round cross section, it may be compressed and flattened.

As described above, in the present invention, the crossover wiring member having the intersecting portion is not located on the inner circumference side of the insulating plate or distributed at multiple locations along the periphery of the insulating plate, but is arranged at approximately -100 locations. Since they are concentrated on the outer periphery of the insulating plate, they are easy to manufacture and easy to wire.

Moreover, even if the dimensions of the crossover wiring member become large, the three-phase coil can be made flat and thin as a whole.

Therefore, it is possible to reduce the air gap, etc. in a magnetic circuit of a rotating electric machine or the like using a thin, flat three-phase coil, thereby reducing magnetic resistance and increasing output.

Furthermore, since a large number of disks are stacked one on top of the other, the total number of windings can be increased, and a three-phase flat coil with sufficient output can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a developed view showing the winding structure of a conventional three-phase coil, FIG. 2 is a developed view showing the principle of the three-phase coil winding structure devised in the present invention and adopted in the present invention, and FIG. 4 and 4 are vector diagrams showing the generation state of electromotive force in the three-phase coil shown in FIGS. 1 and 2, and FIG. 5 shows the three-phase flat coil previously proposed by the present inventor. FIG. 6 is a schematic actual wiring diagram showing the transition wiring member of the coil shown in FIG. 5, and FIG. 7 is a schematic wiring diagram showing the coil shown in FIG. 5 in a star-shaped connection. Figure 8 is an external view of the front side of a single disk used in an embodiment of the coil of the present invention, Figure 9 is an external view of the back side of the coil shown in Figure 8, and Figure 10 is an external view of the back side of the coil shown in Figure 8. FIG. 11 is a schematic diagram showing a completed three-phase coil using the single disk shown in FIG. 10, and FIG.
The figure is a schematic physical wiring diagram showing the portion of the crossover wiring member that should be added to the coil in Figure 10 to form the coil in Figure 11, and Figure 13 is a simplified schematic diagram of the winding in Figure 10. Electrical wiring diagram, Fig. 14 is a schematic electrical wiring diagram showing a multi-layered three-phase coil with an increased number of turns, which is an embodiment of the present invention;
15 to 17 show the structure of the above embodiment, FIG. 15 is a partial cross-sectional view taken along arrow XIX-XTX in FIG. 17, and FIG. 16 is a partial sectional view taken along arrow xx-xx in FIG. 17. A partial sectional view, FIG. 17 is a sectional view of the crossover wiring member portion. 3... Insulating plate, 2... Coil piece, 3c... Hollow part of insulating plate, al+ b, CIt a'2+
b2. c2. a1'+b+', CI'+a2', b2
'+02'... Output side terminal part, (R)... Turned part, X'... Crossing part, 4... Transition wiring member, NT
...Neutral point output terminal, 3a...Insulating plate protrusion, 4b
, 4c, 4d...Metal members of crossover wiring members, 4a...
- Insulating member of crossover wiring member, 51, 52, 53... disk, 30... interlayer insulating member.

Claims (1)

[Claims] It has a large number of coil pieces (2) arranged on the front side and the back side of a disc-shaped insulating plate (3), and the collection of the coil pieces (2) is a three-phase coil. This is a three-phase flat coil formed by laminating a plurality of disks forming a part of the following. Disc-shaped insulating plate (3) with a hollow part (3c) in the center
and an output side terminal that constitutes a winding start portion and a winding end portion on the outer peripheral side of the insulating plate (3), and the insulating plate (3)
It is formed as a coil piece (2) made of a good conductor and has a folded part (R) on the outer circumferential side and the inner circumferential side of the insulating plate (3), and is arranged radially on the front side and the back side of the insulating plate (3), and , a plurality of disks stacked on top of each other, an interlayer insulating member (30) disposed between the disks, and a three-phase C phase and B phase formed by connecting the output side terminal portions of each of the disks. A part of the B-phase terminal of the output side terminal section where the phase and C phase are all wound in the same direction in a wavy manner and three-phase alternating current is input or output has a polarity different from that of the C-phase and C-phase terminal sections. a three-phase coil consisting of an assembly of the disks;
and is provided in the middle of the three-phase coil and concentrated at approximately one location on the outer circumferential side of the insulating plate (3) of one of the disks, and is provided in each of the C phase, b phase, and C phase. A crossover wiring member (4) having an intersecting part (X') connected to the coil piece and intersecting three-dimensionally.