JPS5833786B2 - How to load armature coils - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of loading an armature coil of an armature of a rotating electric machine.

The armature of a rotating electric machine has a structure as shown in FIG.

In FIG. 1, an armature core 2 having a substantially cylindrical shape around a shaft 1
And commutator 3 is installed.

The armature core 2 is loaded with an armature coil 4 covered with an insulating film.

The armature coil 4 is loaded into the armature core 2 as shown in FIG. 2, which is a sectional view taken along the arrow line ``--'' in FIG.

That is, the armature core 2 is provided with a plurality of groove-shaped slots 5 that are recessed in its radial direction and extend in its axial direction.

The inner surface of this slot 5 is covered with an insulator 6, and its width is approximately the same as the diameter of the armature coil 4.

In this slot 5, an electric coil 4 having a circular cross section is inserted one after another.
It is pushed in.

Here, as described above, since the width of the slot 5 is almost the same as the width of the armature coil 4, the armature coils 4 are arranged in a line in the depth direction of the slot 5.

However, as can be seen from FIG. 2, the ratio of the volume of the internal space of the slot 5 to the volume of the armature coil 4, that is, the filling rate of the armature coil 4, is relatively low.

In the case of FIG. 2, the filling factor is 80φ or less.

This is contrary to the fact that the slot 5 has a substantially rectangular cross section.
This is due to the fact that the armature coil 4 has a circular cross section.

Therefore, the armature coil 4 cannot be accommodated unless the depth H of the slot 5 is increased.

By the way, since the armature core 2 is cylindrical, as the depth H increases, the distance W between the slots 5 at the bottom of the slots 5 decreases.

When this distance W becomes smaller, the magnetic flux path cross-sectional area of the armature core 2 decreases, and the torque of the electric motor decreases.

Here, if the armature coil 4 is made to have a rectangular cross-section in accordance with the cross-sectional shape of the slot 5, the filling rate can be increased, but the armature coil 4 having a rectangular cross-section is generally expensive.

The cross-sectional area of the armature coil 4 determines the current capacity of the rotating electric machine.

That is, in the conventional loading method of the armature coil 4, the filling rate of the armature coils in the slot 5 is low, so when trying to load a large number of armature coils with large current capacity, the magnetic flux path may be interrupted. This has disadvantages in that the area is reduced or the armature coil 4 becomes expensive.

The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a method for loading armature coils with a high filling rate of armature coils in slots.

The present invention suppresses and shapes an armature coil in a slot.

An embodiment of the present invention will be described below based on the drawings.

In FIGS. 3 and 4, an armature coil 4 with a circular cross section is shown.
is formed by the plate 7 in the slot 5.

As shown in FIG. 3, one armature coil 4 is placed in the bottom of the slot 5 and is press-formed with a plate 7.

This plate 7 is thinner than the width of the slot 5 and is equal to or greater than the width of the armature core, and its tip 8 is formed in an arc shape with no corners.

At this tip 8, the pressing force of the armature coil 4 is adjusted so as not to destroy the insulator 6 and the insulation coating of the armature coil 4.

At this time, the tip portion 8 bites into the electric machine coil 4, and the armature coil 4 is formed into a substantially square shape.

Lay the next armature coil 4 on top of this armature coil 4,
Shape in the same way.

This operation is repeated and the armature coil 4 is loaded into the slot 5, as shown in FIG.

As can be seen from FIG. 4, the armature coils 4 are loaded in a stacked state, and the filling rate is extremely high.

Therefore, when the same armature coil 4 is stacked the same number of times, the depth H of the standant 5 can be reduced compared to the conventional one, and as a result, the mutual distance between the slots 5 at the bottom of the slot 5 can be reduced. The distance W increases.

In other words, the current capacity can be increased without reducing the cross-sectional area of the magnetic flux path, and the performance of the rotating electrical machine is improved.

As described above, the armature coil loading method according to the present invention involves suppressing and shaping the armature coil in the slot for each coil inserted into the slot. It has an excellent effect of increasing the rate.

[Brief explanation of drawings]

Figure 1 is a front view of a conventional armature, Figure 2 is the same ■-■
3 is a sectional view showing an embodiment of the armature coil loading method according to the present invention; FIG. 4 is a sectional view showing the armature coil loaded according to the embodiment. . Explanation of symbols, 4... Armature coil, 5...
... Throat.

Claims (1)

[Claims] 1. In an armature coil loading method in which the armature coils are stacked and loaded into the slots of the armature core, each time the armature coil is inserted, a suppression plate having a width at least equal to or more than the armature core width is installed. A method for loading an armature coil, characterized in that the armature coil is loaded while being compressed and shaped in the slot using the above-described method.