JPS59132739A - Armature winding for rotary electric machine - Google Patents

Abstract

PURPOSE:To increase the width of the tees of an armature and to reduce the length of the tees by directing an outside coil toward the peripheral direction of the armature in the longitudinal direction of the coil, directing an inside coil toward the central direction of the armature in the longitudinal direction of the coil, and winding the coil in the slots of the armature. CONSTITUTION:In an armature in which formed coil of flat or elliptical shape in section is wound in an armature, an outside coil 5 of flat or elliptical section is directed toward the peripheral direction of the aramature, an inside coil 6 of the same shape as the outside coil is directed toward the center of the armature in the longitudinal direction of the coil, and wound in the slots of the armature. In this manner, the diameter (d') of the armature core to the bottom of the slot restricted by the inside coil increases. Accordingly, the width of the magnetic passage between the slots, i.e., the width (t') of the tees increases, and the magnetic circuit resistance decreases.

Description

[Detailed description of the invention] The present invention relates to an armature winding for a rotating electric machine.

Conventionally, in an armature in which a form coil having a rectangular or elliptical cross section is wound around the armature, as shown in FIG. 1 as a partial longitudinal sectional view of the armature and FIG. 2 as a schematic external view of the form coil, In consideration of ease of winding the throttle, both the outer coil 2 and the inner coil 3 are wound around the armature core 4 via an insulator with their longitudinal directions directed toward the center of the armature (1). Therefore, the diameter d of the armature core to the slot bottom becomes smaller and smaller as the ratio between the longitudinal direction and the dagger direction of the cross section of the form coil becomes larger, and the radius t of the teeth also becomes smaller. There was a problem that resistance increased.

In view of the above points, it is an object of the present invention to provide an armature in which the magnetic circuit resistance of the armature is reduced by increasing the tooth width and decreasing the tooth length.

The present invention will be described below with reference to embodiments shown in the drawings.

Fig. 3 is a partial vertical sectional view of an armature to which an armature winding of a rotating electric machine according to the present invention is applied, and Fig. 4 is a schematic external view of a foam coil used in the armature shown in Fig. 3, with a rectangular cross section. An outer coil 5 having a circular or oval shape has its longitudinal direction directed toward the circumferential direction of the armature, and an inner coil 6 having the same shape as the outer coil is inserted into the slot of the armature with its longitudinal direction directed toward the center of the armature. It is wrapped.

In the armature wound as described above, the diameter d' of the armature (2) core up to the bottom of the slot regulated by the inner coil is larger than the conventional diameter d. The amount corresponds to (longitudinal dimension - short dimension) x 2 of the substantially rectangular cross section. That is, since the core diameter d' is larger than the conventional core diameter d by this amount, the width of the magnetic path between the slots,
That is, the width t' of the teeth becomes larger. That is, the magnetic circuit resistance is reduced by increasing the width of the teeth and decreasing the length of the teeth.

As described above, in the armature winding of a rotating electric machine according to the present invention, in an armature wound with a form coil having a rectangular or elliptical cross section, the outer coil has its longitudinal direction parallel to the circumferential direction of the armature. Since the inner coil is wound in the slot of the armature with its longitudinal direction facing the center of the armature, the width of the teeth of the armature increases and the length of the teeth also decreases. Compared to the conventional wire winding method, this method is more effective in terms of circuit resistance, and has a significant effect of improving the performance of rotating electric machines.

[Brief explanation of the drawing]

Figure 1 is a partial vertical cross-sectional view of the armature of a conventional rotating electrical machine;
The figure is a schematic external view of a foam coil used in the armature shown in Figure 1, Figure 3 is a partial vertical sectional view of the armature of the rotating electric machine according to the present invention, and Figure 4 is the electric machine shown in Figure 3. Appearance diagram of foam coil used for child 1...teeth,
d, d'...Diameter of armature core to bottom of slot, 5
．． 6... Form coil with rectangular or oval cross section, t, t'... Width of teeth. Representative Patent Attorney Takashi Okabe (4) Figure 1 Figure 2

Claims (1)

[Claims] In an armature wound with a form coil having a rectangular or oval cross section, the outer coil has its longitudinal direction directed toward the circumferential direction of the armature, and the inner coil has its longitudinal direction directed toward the center of the armature. An armature winding for a rotating electric machine, characterized in that the armature winding is wound in a slot of a child.