JPS59127546A - Armature coil for rotary electric machine - Google Patents

Abstract

PURPOSE:To shorten the manufacturing time of a coil and to improve the cooling effect in a rotary electric machine by providing an interval between conductors of a coil head, omitting the winding of an outer layer insulator of this part, thereby facilitating the ventilation and cooling. CONSTITUTION:Leads 12 are barely formed at one end, and a bent coil head 13 is formed at the other end. An interval 14 is provided between the conductors 11 of the head 13 as an insulating interval and a ventilating interval. An insulator 4 is wound on the outer periphery of the coil except the leads 12 and the head 13, and an outer layer insulator 6 is wound thereon. In this manner, the conductors 11 of the head 13 are spaced at the interval even if the insulating film is damaged due to bent, sufficient insulation between the turns of the conductors is held and ventilated. Consequently, the manufacturing time of the coil is shortened, thereby improving the cooling effect.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention F3A1-i' relates to an armature coil for a rotating electrical machine such as a DC machine, in which ventilation cooling of the coil head is improved.

A conventional electrical coil of this type has a partially cutaway perspective view shown in FIG. 1. The figure shows the case of a lap-wound coil. (1) is an insulated conductor, consisting of three wires arranged vertically to form three turns, each made of enameled wire coated with synthetic resin, or made of heat-resistant material such as glass fiber, polyamide paper, or polyimide film. For wrapping the insulation material, commercially available wires such as coated insulated wires are used. These conductors (1) are formed into a tortoise shell shape by the number of windings (three times in the figure) using a winding die, and an opening part (2) is formed at one end.
is formed bare, and the other end is bent into an upper opening and a lower opening to form a coil head (3). The insulation coating of the conductor (1) is usually about 0.1 mm thick and has a withstand voltage of 200 to 300
It has an extremely low withstand voltage of v. Therefore, the insulating material (4) corresponding to the rated voltage of this rotating electric machine was
And the coil head (3) is left and is wound around the outer periphery.

The coil head (3) has a conductor (1) with a small bending radius.
800° bending process, and the insulation coating at this part would be damaged, so we wrapped the outer insulation layer (6) made of heat-resistant glass tape cut in the same shape as the coil head (3).
The armature coil is completed.

In the above-mentioned conventional armature coil, the head insulation (5) must be cut from the material into the shape of the coil head (3) and inserted, and the outer layer insulation (6) must be inserted up to the coil head (3). It was a hassle and took up a lot of time. In addition, the coil head (3) had head insulation (5 mm) inserted between the conductors (1) and an outer layer insulation material (6) wrapped around the outer periphery, which hindered cooling.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional method, and it provides a space between the conductors at the head of the coil, eliminates the outer layer insulation material in this part, and provides ventilation cooling.
The purpose of the present invention is to provide an armature coil for a rotating electrical machine that shortens the manufacturing time of the coil and improves cooling.

FIG. 2 is a partially cutaway perspective view of an armature coil according to an embodiment of the present invention. (11) is a conductor coated with insulation like the conventional conductor (1) above, and the figure shows a case in which three pieces of wood are arranged vertically and wound three times, and one end has a sunrise part 0.
The coil is formed bare and a bent coil head is formed at the other end. Each conductor (Il
) is provided with a gap 94), which serves as an insulation gap and a ventilation gap. An insulating material (4) is wound around the outer periphery of the coil in the same manner as in the conventional coil, except for the sunrise part (+2+ and the coil head -), and an outer layer insulating material (6) is wound thereon.

In the armature coil of the above embodiment, even if the insulation coating of the conductor (11) of the coil head 03I is damaged due to bending, there is a gap between each conductor (11), and there is a sufficient turn interval. It maintains insulation and allows ventilation.

In the above embodiment, the case of a two-layer overlapping coil is shown, but the present invention can also be applied to a two-layer wave-wound coil.

As described above, according to the present invention, an interval is provided between the conductors of the coil head.1. Since the winding of the outer layer insulation material in this part is omitted, the manufacturing time of the coil can be shortened and cooling can be improved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a conventional armature coil, and FIG. 2 is a partially cutaway perspective view of an armature coil according to an embodiment of the present invention. ·Insulating material,
6. Outer layer insulating material, 1 unit... Conductor Mi 12... Leading portion, 13... Coil head, 14... Spacing Note that the same reference numerals in the drawings indicate the same or equivalent parts. Agent Makoto Kuzuno (1 other person) No. 11, I Fig. 2

Claims (1)

[Claims] A plurality of conductors with peeling insulation coatings are arranged vertically and formed into a predetermined coil shape, and the upper and lower ends are bent at 180 degrees to form a coil head at the other end. Insulation and ventilation intervals are provided between each conductor of this coil head, and an outlet is formed at one end, and the required insulation is wound around the outer periphery except for the coil head and sunrise part. An armature coil for a rotating electric machine, characterized in that the armature coil is turned and an outer insulating material is wound thereon.