JPH01255459A - Formation of cylindrical armature winding - Google Patents

Abstract

PURPOSE:To contrive the improvement of the characteristics of the title winding and the miniaturization of the same, by a method wherein an intermediate twist and bend coil, whose length is longer than an inside screw-like twisted and bent coil by 2t1Xpi, and an outside screw-like twisted and bent coil, whose length is longer than the length of the inside screw-like twisted and bent coil by 2(t1+t2)Xpi, (here; t1 and t2 are the thicknesses of the inside and intermediate screw-like twist and bent coils) are prepared independently in the case of 3-stage winding. CONSTITUTION:At first, a multitude of windings of a same diameter fine wires of a conductor is wound around a winding frame to produce total 9 pieces of alignment element coils for 3 phases and 3 stages in the case of a 3-phase motor. Next, belt coils are produced. Subsequently, the formed belt coil is screw-like twisted and bent along the surface of a gauge substantially equal to the width L of a cylindrical coil 6 in the axial direction of a motor to make a second stage screw-like twisted and bent coil 3b, whose length is longer than a first stage screw-like twisted and bent coil 3a by 2t1Xpi, and a third stage screw-like twist and bent coil 3c, whose length is longer than the first stage coil 3a by 2(t1+t2)Xpi. The coil ends 7a, 7b, 7c of the twisted and bent coils 3a, 3b, 3c of respective stages are deviated and superposed to make an integrated multi-stage screw-like twisted and bent coil. Thereafter, the coils are finished into the cylindrical coil finally.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is directed to a cylindrical electric motor for a small, high-performance brushless motor suitable for, for example, motors for FA, OA equipment, and motors for aerospace equipment. Concerning how to create a child winding.

[Conventional technology]

Conventional method A as a manufacturing means for this type of cylindrical armature winding so far [Japanese Patent Application Laid-open No. 60-216746]
In the diagram shown in Figure 7, it is a two-layer wave-wound structure of a single conductor, so "aligned coil - boat-shaped band coil - screw folded coil - cylindrical winding"
The cylindrical armature winding is completed through the following process.

Furthermore, since the conventional method B [Unexamined Japanese Patent Publication No. 61-125509] has a two-layer wave-wound structure with multiple conductors made by bundling thin wires,
As shown in the figure, a similar cylindrical armature winding is completed through the steps of "element coil -> boat-shaped band coil - screw folded coil - cylindrical winding".

Furthermore, in conventional method C, as shown in FIG. 10, after finishing a plurality of cylindrical windings, an inner cylindrical winding is inserted into an outer cylindrical winding to form an integrated cylindrical winding.

[Problem to be solved by the invention]

However, these conventional methods for producing cylindrical armature windings have the following drawbacks.

In the case of conventional method A, since it is a single conductor, it is difficult to mold a thick conductor, and although it can pass a large current,
Since the number of turns decreases, the induced voltage decreases, and as a result, it is difficult to increase the number of ampere turns.

On the other hand, thin conductors are easier to mold, but increase conductor resistance, lower ampere turns, and lower power density.

Therefore, by creating multiple conductors using element coils made of bundled thin wires as in conventional method B, it became possible to freely set the number of turns and wall thickness. Due to the reliability, operating conditions, and power supply voltage, they are often made by bundling several conductors together, and in this case it is difficult to wind them in alignment.

Furthermore, in both conventional methods A and B, the following problems remain in order to finish a single integrated screw-folded coil into a cylindrical winding.

In other words, since there is a difference between the inner and outer circumferences only in the thick part of the cylindrical winding, the inner conductors are in close contact with each other, and a gap is created between the outer conductors.

Moreover, as shown in FIG. 9, the coil end portions cannot be avoided being concentrated in the negative portion, resulting in increased dimensions and difficulty in wiring work.

In addition, with conventional method C, when inserting the inner winding into the outer cylindrical winding, the conductor is likely to be damaged, and in order to prevent tin from getting on it, it is necessary to increase the gap, which reduces the space factor. I can't hope for a second one.

Moreover, it is extremely difficult to find the maximum point of magnetomotive force while shifting the inner and outer cylindrical windings in the circumferential direction so that the coil ends do not overlap and the in-phase coils are aligned radially around the circumference. It is.

An object of the present invention is to provide a method for creating a cylindrical armature winding that is easy to wind in alignment, improves the space factor, and is easy to connect.

[Means to solve the problem]

In order to achieve the above object, in the method for producing a cylindrical armature winding of the present invention, when a multi-stage winding (for example, three stages) is made, the middle thread fold is made longer than the inner thread fold coil by (2t1×π). Separately make a coil, and an outer screw-folded coil that is further lengthened by (2(t, +t2) Each coil end is shifted by a predetermined amount in pole pitch units, and then integrated and wound around the winding core to form a cylindrical winding with uniform inner and outer circumferential conductors.

[For production]

If a cylindrical armature winding is made by the above method, the diameter of the conductor wire becomes thicker toward the outer stage, so that the inner and outer conductor winding densities can be averaged. In addition, the coil ends can be distributed to arbitrary positions in units of pole pitches, making it easier to align the pole positions of each phase coil and making wiring work easier. Therefore,
Improved characteristics and miniaturization are 01 functions.

Further, by reducing the thickness of the element coil, bending becomes easier, bending accuracy improves, adhesion between each stage improves, and space factor improves.

〔Example〕

In one embodiment of the present invention, a three-phase, three-stage, four-pole system is taken as an example.

Cylindrical windings are manufactured through the following four steps.

The process is sequential: alignment element coil -> band coil -> screw folded coil - cylindrical winding.

1) First, create an alignment element coil.

A thin conductor wire of the same diameter is wound around the winding frame many times, and the alignment element coil 1 as shown in FIG.
In the case of a phase motor, Fig. 2 (a) shows the U, V, and W phases.
, (b), and (c), making a total of 9 pieces for 3 phases and 3 stages.

At this time, the pitch between the conductors of each stage coil is as shown in Fig. 1(f).
Arrange the conductors in each overlapping stage of the finished product shown in radially.

Here, P is the number of poles, L is the axial width of the finished cylindrical winding,
g is the length of the long side of the element coil, t is the thickness of the coil side,
Assuming that b is the width of the coil side and the subscript is the number of stages, the length g of the long side in Fig. 2 is made to satisfy the Haboshita equation.

to satisfy.

2) Next, manufacture the band coil.

As shown in FIG. 3(a), the long sides of the alignment element coils are aligned and aligned along their edges, and integrally and flatly formed to form a long and narrow boat-shaped band coil.

Adhesive tape (not shown) is applied to the aligned coil rows to maintain their shape. In the above manner, the first, second and third band coils 2 are created.

Next, the formed band coil 2 is bent into a screw shape at an inclination angle α along the side of a gauge 10 whose width is approximately equal to the width of the cylindrical winding 6 in the motor axial direction.

Here, the inclination angle α is set so as to satisfy the following expression.

1st stage screw folded coil 7 (11") / P2nd stage screw folded coil 3rd stage screw folded coil 3°Fit. However, D is the inner diameter of the 1st stage coil.

After the bending operation, when the gauge 10 is pulled out from the coil, each stage of the coil is folded into a plate shape with a predetermined number of threads, as shown in FIGS. 1(a), (b), and (c). Coils 3a, 3b, and 3C are completed.

Figure 1 ((1)
) by shifting the coil ends to create an integrated multi-stage screw-folded coil with overlapping sounds.

3) Finally, finish the cylindrical winding.

As shown in FIG. 1(d), each stage of screw-folded coils 3a, 3b, 3c is connected to its coil end portions 7a, 7b.
, 7c are shifted by a predetermined m to overlap each other in pole pitch units so that the phases of the coils in each stage match.

Next, as shown in FIG. 1(e), circle r: J is wound around the core 12 in layers, formed so that the single-layer coil rows at both ends overlap each other, and after mutually binding, the cylindrical core 12 is pulled out. When this is done, a cylindrical winding 6 with coil end portions distributed over the entire circumference is completed as shown in FIG. 1(f).

For the purpose of explanation, three stages are used as an example, but it is obvious that the same process can be used for n stages, so the explanation will be omitted.

Further, other embodiments of the present invention will be described.

In the previous embodiment, the conductor wire diameter was the same for each stage, but as shown in Fig. 4, the conductor diameters of the conductors 4a, 4b, and 4c of the element coils at the 1st, 2nd, and 3rd stage ports were changed. , d + <
(Roughly, dl・d2・so that 12<d3
d3') relationship is ゛. However, θ is the angle between the center and d t, and if the in-phase conductors are selected to be radially arranged at the same angular pitch.

Figure 5 also shows the inspection and correction jig, which is made of a solid flat plate.
3e -, a thin bar-shaped horizontal machine member 13a parallel to
, 13b and the vertical formwork part ++ connected at the angle α of this part.
The long sides of 13c and 13d are π(D+2L) and π(
D+2t+2+2).

π(D+2t +2t2+2t3), a diamond-shaped formwork with the short side L is made, and the molding machine member 1 is fixed as shown in Figure 6.
3b, 13d, 13a, and 13c, the outer edge side of the screw-folded coil 3a was brought into contact with the outer edge side of the screw-folded coil 3a, and the inner edge side of the neck removal side 18a was brought into contact with the outer edge side of J2Jj of the screw-folded coil 3a. In this case, it is sufficient that no gaps occur.

If there are gaps or protrusions, correct them to fit the formwork and align the conductors.

The inspection and correction jig 13 is formed to be larger in size corresponding to the second and third stages.

〔Effect of the invention〕

In the present invention, since the cylindrical winding is created by the method described above, (1) the in-phase coils of the multistage lapped winding are radially aligned at the same angular pitch, so the magnetomotive force is uniformly distributed and the torque efficiency is can be improved.

(2) Since the adhesion between each stage of multi-stage overlapping winding can be improved,
The space factor is improved, the coil thickness accuracy is improved, and the gap length can be managed accurately and appropriately, so the gap length can be reduced and the output can be improved, downsized, and increased in output.

(3) The coil ends can be shifted and arranged easily, making wiring work easier.

[Brief explanation of the drawing]

Figures 1 to 3 show the steps and progress of one embodiment of the present invention.
Fig. 4 is a cross-sectional view showing another embodiment; Fig. 5 is a diagram showing the external appearance;
6 and 6 are drawings showing the inspection and correction jig, and FIG. FIG. 10 is a drawing showing a conventional example. Note that the same components in the figures are denoted by the same reference numerals at 1°. 1... Element coil 2... Band coil 3.3a, 3J 3cm screw folded coil 4a,
4b, 4cm--Conductor 6... Cylinder @ Wire 10... Gauge 12... Core 13... Inspection, correction 1'3a. 13b, 1-3c, 13d-Formwork member 18...Deck-shaped substrate. Applicant's agent Mr. Sato Figure 2 Figure 3 Diagram 4 Figure 5 → [Double Blind Seal - Words Ii - Kakuenen Shire (i)) Band Coil Figure 6

Claims (1)

[Claims] 1. When the wall thickness of the coil is t_1, t_2, ... t_n, and the circumference is π, the coil side length of the second stage screw folded coil is longer than that of the first stage screw fold coil. Sao (2t_1×π)
Furthermore, the length of the coil side of the third-stage screw-folded coil is longer than that of the first-stage screw-folded coil by [2(t_1+t_
2) x π], and then make n plate-shaped screw-folded coils in accordance with these in sequence, overlap each stage of these screw-folded coils, place them around the core, and bring both ends together. A method for making a cylindrical armature winding, characterized in that it is fixed and finished into a cylindrical winding. 2. The method for producing a cylindrical armature winding according to claim 1, wherein the coil end portions of the two and n stages of screw folded coils are shifted by an arbitrary amount in units of pole pitch so that they do not overlap. 3. A method for producing a cylindrical armature winding according to claim 1 or 2, wherein the coil is wound with a different conductor diameter for each stage. 4. The method according to any one of claims 1 to 3, which inspects and corrects a threaded coil using a jig having a diamond-shaped formwork member with a winding angle α on a flat plate substrate. How to make a cylindrical armature winding.