Armature coil of direct-current motor

Abstract

The invention provides an armature coil of a direct-current motor, relates to an arrangement mode of an armature coil of a low-voltage and high-current direct-current motor in an armature core, and is mainly to solve the problems that since components of the conventional armature coil of the existing low-voltage and high-current direct-current motor are parallelly arranged in a line, occupation space of electromagnetic wire body insulation is big and armature punching grooves are not fully utilized, and the two components in the middle cannot be closely attached to an armature core groove and it is difficult for coil components to dissipate heat. The armature coil of the invention is composed of two single big U-shaped coil components and two single small U-shaped coil components, wherein the big U-shaped coil components are arranged outside the small U-shaped coil components. The armature coil components of the direct-current motor are wound by single electromagnetic wires, so that the occupation space of the electromagnetic wire body insulation is reduced and armature coil groove-filling ratio is increased; effective sectional areas of the components formed by the single electromagnetic wires are big, so that current density and heat factors of the armature coil components are reduced; and each component is closely attached to the armature core groove wall, so that the coil components can dissipate heat easily and the armature coil is long in service life.

Description

technical field [0001] The invention relates to an armature coil of a DC motor, in particular to an arrangement method in which the number of armature coil elements of a low-voltage high-current DC motor is 4 in the armature iron core. Background technique [0002] At present, most of the DC motor armature coils are composed of multiple components. According to the design, the coil components are generally two or more, and the multiple components are arranged in a row. The thickness of the component wire head and the armature slot is the same. In the DC motor, due to the large current, the cross-section of the electromagnetic wire of each element is enlarged, and each element of the coil is wound by two electromagnetic wires, which are arranged in the upper and lower layers, and the four elements are arranged in a row. As a result, the insulation of the magnet wire body occupies a large space, and the armature punching slot is not fully utilized; and the two elements in the ...

AI Technical Summary

Problems solved by technology

As a result, the insulation of the electromagnetic wire body takes up a large space, and the armature punching slot is not fully utilized; and the two elements in the middle cannot be close to the armature core slot, and the heat dissipation of the coil element is difficult; when the same slot shape size, the cross section of each element cannot be made To the maximum, the current density of the armature coil components is large, and the heating factor is large; when arranged in the traditional order, the relative distance between the wire ends of each component is small, the thickness of the piece tooling is thin, the mechanical strength is poor, it is easy to deform or break, and the service life is short , It is difficult to split the component wire end when making the coil, and the shape of the coil wire end is irregular, which leads to difficulty in offline

[0003] 2 electromagnetic wires are arranged in parallel in upper and lower layers to form 4 components in each layer. The traditional arrangement order of the wire ends is 1, 4 for the big U, and 2, 3 for the small U. The disadvantages are ①2, 3. If the space between the wire ends is too small, the thickness of the slicer will also become smaller, and the mechanical strength is not enough, which will cause the slicer itself to deform and break easily; ②It is difficult to slice the armature coil wire ends; ③The armature coil wire ends are split The post-forming is irregular, and it is difficult to insert wires into the slots of the commutator risers

Affects the efficiency of armature embedding wire, has hidden quality problems, and increases production costs

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