JPS59162737A - Motor coil - Google Patents

Abstract

PURPOSE:To improve the space factor by a method wherein a pair of coils, each of which has terminals at its inside and outside, are put one upon another in such a manner that the winding directions are opposite to each other and the inside terminals of both the coils are connected together. CONSTITUTION:A motor coil 11 is composed of a pair of coils 12 each of which has terminals 12a and 12b at its inside and outside respectively and those coils 12 are put one upon another in such a manner that the winding direction are opposite to each other. The inside terminals 12a of both the coils 12 are connected together directly or by a lead wire or solder 14 or the like. With this constitution, a space for connection of the coils and a space for lead wires for wiring are not necessary and the space factor is improved.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a motor coil.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, in ultra-small motors, for example brushless motors (e.g. capstan motors for tape recorders) with a flat coreless structure as shown in Fig. 1, the armature coil ( For the wiring process of 1), print wiring board (3) 1! ! When all the armature coils (1) are used, the winding start end (2a) and winding end end (2a) of each motor coil (2) constituting the armature coil (1) and the terminal (2) on the printed wiring board (3), respectively.
3a) and (3b) K lead wire (4a) and (4
In b), the connection was made by soldering. In Fig. 1, the yoke (5) and (6) are fixed to the shaft (9), and a magnet (8) is fixed on the yoke (5).The magnet (8) is made of ferrite or the like. is used.

In such an ultra-compact motor having the configuration shown in Figure 1, when the flint wiring board (3) is not used, the winding start of the motor coil (2) is on the inside, so the winding start end on the inside of the motor coil (2) On the wiring lead wire from (2a), armature coil (1)
and the yoke (6) forming the magnetic circuit (or between the coil (1) and the magnet (8)) plus the distance between the armature coil (1) and the yoke (6)
It is necessary to provide the interval (9) between the two.

In addition, when the printed wiring board (3) is placed all around the circumference as shown in the figure, the dead space of the lead line must be taken into account as the interval (9), but the dead space due to the thickness of the printed wiring board (3) is However, in any of the above cases, space was a problem from the viewpoint of miniaturizing the entire configuration. The latter printed wiring board (3)? When used, the disadvantage was that the efficiency of the magnetic circuit was poor.

Purpose of the Invention In view of these conventional problems, the present invention provides a miniaturized motor coil that has a higher space factor than the conventional one and achieves all the same electromagnetic conversion characteristics. The entire purpose is to provide.

SUMMARY OF THE INVENTION The motor coil according to the present invention comprises a pair of coils having inner and outer trap ends, respectively. , the inner ends of both coils are completely connected to each other by overlapping each other so that the winding directions are opposite to each other. Therefore, by applying the motor coil assembly according to the present invention to the armature coil of an ultra-small motor, it is possible to realize all the efficient electromagnetic conversion characteristics.

Embodiments Examples of the motor coil according to the present invention and examples of its application will be described below with reference to the drawings.

FIG. 2 shows an embodiment of a motor coil according to the present invention,
In the same figure, the motor coil circle has a pair of coils (121) having an end (12a) and an end (12b) on the inside and outside, respectively. The ends (12a) of the motor coil αυ are connected directly to each other by metal or lead wire, soldering a→, etc. This motor coil αυ is obtained as follows.

In other words, the welded wire (the outer layer of the core wire is a cement layer containing a welding material?
When the welded wire is wound from the inside to the outside while being heated completely, the weld material on the outer layer of the welded wire hardens as it is wound, forming a coating layer. Two coils with the same winding direction (121') were formed in this way.

One coil a2 is arranged in the same manner as shown in FIG. 6, with the front and back sides of the coils a2 reversed. In the arrangement of both coils, the winding directions are opposite to each other.

The inner terminals (winding start terminals) of these coils (1 piece overlapped and pasted together, both coils 02) (12a) Directly or with lead wire a (in the case of Fig. 5) with all valves connected. By connecting with soldering I, the motor coil σ1) shown in FIG. 2 is obtained. In the case shown in FIGS. 2 and 6, the inner terminals (12a) are directly soldered to each other.

Is there any current in the motor coil (11) formed in this way? When the current is applied, current flows in the direction of the arrow in both coils as shown in FIG. 4, and the lines of magnetic force act in the same direction (strengthening each other). In addition, the motor coil (
11), the coil (121) with the same winding direction was
There is no difference between one coil and the other, but if someone is working on the coil, it is a good idea to color code the front and back so that the front and back sides of the coil can be distinguished. Shishiura?A mistake?It can be prevented.

In the motor coil circle formed in this way and shown in FIG. Then, the outer end of the lower coil α (12
b) (Corresponding to the winding end terminal of the coil There is no need for wiring to be drawn out to all rows.

As the electric wire used for the coil α, a rectangular (ribbon) electric wire (for example, 0.14t thick) as shown in Fig. 2 and Fig. 6 is used.
, width 0.5) i can also be used as a round wire? It can also be used. Both coils (12) are superimposed and fixed by heat welding or resin molding. In order to make an ultra-thin motor coil, it is recommended to use a rectangular electric wire assembly.

As described above, according to the motor coil of the present invention, extra lead wire space for connection of both coils (lead wire space for connection and lead wire space for wiring processing) is required in the height direction (overlapping direction). Therefore, it is possible to make a motor coil with a high space factor. 1. Next, the principle of a brushless motor (capstan motor) such as a flat coreless structure to which the motor coil (11) according to the present invention is applied - Example Fig. 5 Shown below.

In Fig. 5, the difference from Fig. 1 is that the printed wiring board (
3) The armature coil (151) is placed above the motor casing (not shown), and the armature coil αυ in Fig. 2 is completely used. Fixed.

FIG. 6 is an exploded AA diagram showing the specific configuration of the motor in FIG. 5, and shows the armature coil (
1!19 is constructed as shown in the detailed perspective view of FIG.

In FIG. 7, the armature coils α are arranged symmetrically across the six motor coils as shown in the diagram, and every other armature coil is located at the end of the six motor coils. These six motor coils αυ are connected by lead wires to form a two-phase structure, and these six motor coils αυ are molded with resin and embedded in a predetermined shape of motor coil α1). . Here, in a, the shaft hole is a thin resin plate on which a terminal pattern ((a) is formed, and is a screw hole that protrudes from the main body of the armature coil α which has been subjected to resin molding processing.

In this way, in the capstan motor having the configuration shown in Figs. 5 to 7, the armature coil (
By arranging the IS'r, efficient electromagnetic conversion characteristic sound can be realized.

In addition, since the winding start and winding end of the motor coil αυ are provided on the outside, conventionally the winding start 7 on the inside as shown in FIG.
There is no need for wiring to be drawn out.

Therefore, there is no need for a lead wire space in the gap (9) between the armature coil α0 and the yoke (6), which are arranged symmetrically with the motor coil α1), eliminating dead space due to wiring processing and eliminating the need for conventional printed wiring. The plate (3) also becomes unnecessary.

The motor shown in Figs. 5 and 6 is a coreless motor, in which the rotor consists of a yoke (5) (6) and a magnet (8), and the stator consists of an armature coil (without a core).
It consists of L5. In particular, in Figure 6, the axis (force) and boss (
The lower yoke (5) is completely attached through the 2Dt, and the ring-shaped magnet (8) is completely fixed to this yoke (5).

The center hole (6a) of the upper yoke (6) is fitted into the step (21a) at one end of the boss (21). A gap of a predetermined width is formed between the magnet (8) and the upper yoke (6), and in this gap, an armature coil (one coil is placed as a stator) and the magnetic attraction force of the magnet (8) is applied. The upper yoke (6) is fixedly supported by the boss (21).

If the stator is completely coreless as shown in Figs. 5 and 6, eddy current loss due to washing of the stator core will be eliminated. This is a preferable structure for the small, high-output motor used. However, the present invention is not limited to this, and does not include the core in the stator. It can also be applied to a motor provided therein.

In the above embodiment, the pair of coils (121 have the same shape, but they do not necessarily have to be the same. For example, the number of windings of each coil may be metal fittings, or the wire diameter or cross-sectional area may be different from each other.) Different wire rods may be used.Also, multiple pairs of coils (12 coils) may be stacked.

Effects of the invention Is the invention as described above? Are two coils used? When comparing connected devices of the same capacity, space for both coil connections and lead wire space for wiring processing is unnecessary compared to the conventional method, so the space factor is improved compared to the conventional method, and therefore the same electromagnetic Miniaturization is possible to achieve the conversion characteristics.

[Brief explanation of the drawing]

Fig. 1 is a simplified cross-sectional view of essential parts of an example of a brushless motor with a conventional flat coreless structure, and Fig. 2 is an embodiment of a motor coil according to the present invention. FIG. 6 is a perspective view for explaining the entire manufacturing method of the motor coil shown in FIG.
Is the diagram the direction of the current in the motor coil in Figure 2? Circuit diagram shown,
FIG. 5 is a simplified cross-sectional view of essential parts of an embodiment of a brushless motor to which a motor coil according to the present invention is applied; FIG. 6 is an exploded perspective view showing the entire structure of the motor shown in FIG. 5; Figure 7 is an enlarged view of the armature coil in Figure 6. aυ・・・・・・・・・・・・・Motor coil α effect・−・・・・・・・・・・・・・ Coil (12a) (
12b) ・= end'fm(14)・−・・・・・・・
...It is soldered. Agent Masaru Saturn〃 Yoshio Tsuneba〃 Shun Sugiura Kikan 1 Figure 2 1M3 Figure 4 Figure 5 Figure 7 Figure 6

Claims (1)

[Claims] Ti1- A motor coil characterized in that it is formed by a pair of coils having all ends on the inside and outside, respectively, superimposed so that the winding directions are reversed, and the inside ends of both coils are fully connected.