JPS62285645A - Preparation of cylindrical armature winding - Google Patents

Abstract

PURPOSE:To improve the accuracy of finishing by preparing element coils, in which slender insulating conductos are double-layer wound, at the rate of one per one phase, spirally winding beltlike coils, which are superposed so that long sides are brought into contact, on a gage and pulling out the gage. CONSTITUTION:Element coils 4 in which slender insulating conductors are double-layer wound to a rectangular cross section on a spool at a large number of times are manufactured at the rate of one per one phase. The coils 4 are removed from the spool, and the shapes of the coils are kept by an adhesive tape, etc. The coils 4 are aligned so that long sides are brought into contact mutually, integrally molded flatly, and fixed by the adhesive tape 7, thus shaping a slender boat-shaped band coil 6. The band coil 6 is wound spirally on a gage 8 at an inclineation alpha. The inclination alpha is determined from tan alpha=L/piD/P. P represents the number of poles and 4 in the figure. Accordingly, an armature winding, which is not affected by the dispersion of a wire diameter, abounds in flexibility and can output a high output, is acquired. The armature winding is suitable for small-sized motors for FA, OA and airplanes.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention is directed to 1: A (factory automation), OA (office automation)
This invention relates to a method for producing a cylindrical armature winding (hereinafter abbreviated as "cylindrical winding") for a small, high-performance brushless motor suitable for V3 dexterity motors and motors for aerospace equipment.

(Prior art) A perspective view of a cylindrical winding wire created by a conventional method is shown in FIG.
FIG. 7(b) shows a detailed view of the portion shown in FIG. 7(a) and surrounded by a broken line in this figure.

As can be easily inferred from FIGS. 7(a) and 7(b), in the conventional method, a single conductor 72 is bent spirally around the front and back surfaces of the cylinder and wound in an aligned manner.
An insulating sheet 3 is inserted between the front and back two layers of conductors.

The first is that as a conventional method, the present applicant had previously applied for a patent application filed in
No. 71588 proposed a method for manufacturing a cylindrical armature winding.

As shown in Figure 8, this manufacturing method involves the steps of spirally winding the conductor along the winding guide to form a coil, and after removing the winding frame from the coil, a flat, elongated boat-shaped band is formed. a step of forming a coil; a folding step of folding the band coil diagonally and a predetermined number of times in a spiral; a step of forming the folded band coil into a flat plate shape to form a spiral folded coil; It consists of a process of winding a bent coil around a core and meeting both ends to form a cylindrical winding, and a process of processing in five stages.

Furthermore, the second method is the prior method disclosed in Japanese Patent Application No. 85248/1983.

This manufacturing method is shown in FIGS. 9(a) and 9(b). In other words, the conductor is guided diagonally around the outer edge of a guide plate that is held parallel to the outer edge of the guide plate, and is wound spirally at equal pitches. a step of forming a spirally wound coil by repeating the winding so as to align the element coils, and after removing the guide plate from the spirally wound coil, forming a flattened coil. The method comprises the steps of: forming a plate-like spiral bent coil; and winding the spiral bent coil around a core and fixing both ends together to form a cylindrical winding. .

(Problem that the invention seeks to solve) These conventional methods and prior methods have simple configurations and thin walls.

Although it is suitable for manufacturing high-precision cylindrical windings, it has the following drawbacks because it has a two-layer wave winding structure of a single conductor.

Molding work is difficult when using thick conductors. Furthermore, as the thickness of the cylindrical winding increases, high output can be obtained, but as the number of turns decreases, the induced voltage decreases, resulting in low speed operation and a lack of consistency with the power supply voltage.

The molding process is easy when using a thin conductor, but the circle r
As the wall thickness of the fI winding is reduced, the ampere turns of the winding are reduced and the power density is reduced.

For the reasons mentioned above, a limit of υ1 is imposed on the applicable conductor dimensions, which sacrifices the output density and the efficiency of the entire drive system.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the drawbacks of conventional and prior art methods and to provide a method for producing a cylindrical armature winding with a two-layer wave winding structure using a plurality of conductors.

[Means for solving problems]

The present invention involves winding a thin insulated conductive wire around a winding frame many times to create one element coil per coil, and joining the good coil sides of each element coil removed from the winding frame along the edges. , is formed integrally and flatly to make an elongated boat-shaped band coil.

This band coil is held at a predetermined angle of inclination and a predetermined number of times.
A cylindrical MR child winding made by bending and forming a plate-like spiral folded coil into a plate shape, wrapping the spiral folded coil around the winding core, and then bringing together and fixing both ends to form a cylindrical winding. This is the rl-composition method.

[For production]

Since the present invention uses element coils made of bundled thin insulated conductors, it has a two-layer wave winding structure with multiple conductors, the number of turns and wall thickness can be set freely, and the flexibility of the band coil is also good. It becomes easier to form into a cylindrical winding.

〔Example〕.

A cylindrical winding made in accordance with one embodiment of the invention is depicted in FIG.

FIG. 1(a) shows a perspective view thereof, where D is the diameter and L is the width direction.

FIG. 1(b) is a detailed view of the portion surrounded by the broken line in FIG. 1(a), with a portion thereof cut away.

This cylindrical winding 1 is made by winding coil sides (multiple conductors 2) of bundled thin insulated conductors around the front and back surfaces of the cylinder while bending them in a spiral shape and aligning them.

As shown in FIG. 1(b), the coil sides 2 of both the curved surfaces are held together with an insulating sheet 3 sandwiched between them.

Hereinafter, a method for creating a cylindrical winding according to the present invention will be described, taking as an example a brushless motor equipped with a three-phase, four-pole cylindrical Xai armature winding.

In one embodiment of the present invention, a cylindrical winding is created through the following four steps.

Element coil → band coil → spiral folded coil → cylindrical winding Details of each process are as follows.

1) Preparation of element coils A thin insulated conductive wire is wound around a winding frame many times, and element coils 4 as shown in Fig. 2 are formed, one per unit, in this example U,
Make a total of 3 pieces of V and W phases.

In order to facilitate the subsequent work, the long sides of the element coils 4 are formed into a rectangular shape as shown in the figure, and adhesive tape 5 (
For example, Prepreg Chive (trade name) holds its shape in a cage.

In the diagram 1 is the length of the long side t is the length of the coil side b is the width of the coil side represents.

2) Preparation of band coil As shown in Fig. 3, the strips P of the element coil 4 are formed integrally and flatly so as to be aligned and aligned along their edges to form a long boat shape. Make the band coil 6.

If you stick adhesive tape 7 on the aligned coil rows,
This is convenient for maintaining the shape of the band coil 6.

Note that a is the width of the band coil 6.

3) Creation of a spirally folded coil As shown in the steps from (a) to (d) in FIG. 4, the formed band coil 6 is bent spirally along the surface of the gauge 8 at an inclination angle α.

In this four-pole winding example, a total of three bending operations (
After the steps a) to (b) to (C) are carried out, the gauge 8 is pulled out and formed into a plate shape, resulting in a spirally folded coil as shown in (d).

(3,1) The inclination angle α is determined so as to satisfy the first equation.

tan =□ ・・・・・・・・・・・・ (1st formula)
However, P represents the number of poles, which is 4 in this example.

(3, 2> The width of the gauge 8 should be approximately equal to the length L of the circle [line 1] to be created.

(3, 3) The quality 1 of the long side in Fig. 2 is the second
Make it so that it satisfies the formula.

...(Second formula) 4) Finishing into cylindrical winding As shown in Fig. 5, the spirally folded coil 9 is wound around the cylindrical winding core 10, and some of the coil rows of both E21 and 22 are connected to each other. In other words, some coils 21 are formed in the direction of arrow 11 and some coils 22 are formed in the direction of arrow 012 so that they overlap.
By fixing each other, the cylindrical winding 11 shown in FIG.
Finish it. Note that 21 is an intermediate tap.

As a further embodiment of the present invention, in a multi-polar brushless cylindrical winding, a plurality of spirally folded coils as shown in FIG. 4(d) are joined in tandem along the circumferential direction, and the whole It is also possible to make one circular fiI winding.

Furthermore, the aspect of another embodiment of the present invention is represented in FIG. FIG. 6(a) does not show the middle of bending,
FIG. 6(b) is a diagram of a trapezoidal wave folding state.

In the spiral folding operation shown in FIG. 4, the long sides of the band coil 6 are bent into a triangular wave shape.As a modification of this, the long sides are bent into a trapezoidal wave shape to form a spiral folded coil 9a as shown in FIG. It is also possible to make a cylindrical winding wire 1 and finish it into a cylindrical winding wire 1 in the same manner as shown in FIG. One point g1 conductor segment 24 represents the intermediate position of the U phase.

According to this method, the bending angle can be made obtuse, making it easier to work with thick coils.

〔Effect of the invention〕

Thus, according to the present invention, the following many remarkable effects can be obtained.

■ Since the band coil is made of multiple thin insulated conductors, it has excellent flexibility compared to conventional methods, making spiral folding work easier.

■ In the conventional 2Ff1 wave winding using a single conductor, variations in the wire diameter had a negative impact on the finishing accuracy of the winding, but with the two-layer wave winding using multiple conductors of the present invention, the variation in the wire diameter can be reduced on average. This eliminates the influence and improves the finishing accuracy of cylindrical windings.

■ Since the degree of freedom in setting conditions such as cable diameter, number of turns, and wall thickness increases, it is possible to create the optimal cylindrical winding that matches the operating speed and drive power of the heptad.

[Brief explanation of drawings]

Fig. 1 is a perspective view and partially cutaway detailed view of a cylindrical winding made according to an embodiment of the present invention, Fig. 2 is a plan view and partially sectional view of an element coil, and Fig. 3 is a plan view of a band coil.・Partial opening view, Fig. 4 is a drawing of the process of creating a spiral folded coil, Fig. 5 is an explanatory drawing of finishing to cylindrical winding, Fig. 6 shows the mode of trapezoidal wave bending, and a) shows the middle of bending. Figure (b) is a perspective view of the completed folding, and Figures 7 to 9 are explanatory diagrams of the conventional method/preceding method. 1.71... Cylindrical winding, 2... Multiple conductors (coil sides) 3... Insulating sheet, 4... Element coil, 5...
Adhesive tape, 6... band coil, 7... adhesive tape,
8... Gauge, 9... Spiral folded coil, 9a...
Trapezoidal wave spiral folded coil, 10... core, 11.12
. . . Arrow indicating the direction of overlapping winding of single layer coils 21 and 22, 20 . . . Intermediate tap, 21.22 . . . Single layer coil portion. Applicant's agent: Yu Sato (α) Figure 1 Figure 2 Figure 3 Figure 4 Figure 7 Procedural amendment date September 1988

Claims (1)

[Claims] 1. A step of winding a thin insulated conductor wire around a winding frame many times to form an element coil, and creating one element coil for each armature phase number, and each element removed from the winding. A process of forming an elongated boat-shaped band coil by integrally and flatly forming the long coil sides of the coil so as to join them along their edges, and forming the band coil at a predetermined angle of inclination and a predetermined number of times. A step of spirally bending and forming a plate-like spirally folded coil; a step of winding the spirally folded coil around the core, bringing both ends together and fixing them to form a cylindrical winding; A method for creating a cylindrical armature winding characterized by the following. 2. The method for producing a cylindrical armature winding according to claim 1, wherein when the band coil is bent spirally, the long side of the band coil is bent into a trapezoidal wave shape to form a trapezoidal waveform spiral folded coil. .