The structural design points of the DC motor are different from the AC motor!
DC motors are usually designed from the armature. The steps and general requirements are similar to those of AC motors, except that the armature windings are on the rotor, the poles are on the stator, and the commutators are slightly different.
1 assembly drawing
When drawing the assembly drawing, first draw the core, the pressure ring (or winding bracket) and the end of the armature winding, and then draw the commutator, brush and stator parts. Since the ends of the armature windings are part of the ventilation system, the end lashing should be such that the gap between adjacent conductors at the ends is not excessively narrow. In most cases, it should also be considered that the axial dimension of the field winding is generally large. In order to ensure the normal operation of the brush and the brush holder, the commutator should be located farther away from the armature than the position determined solely by the end of the armature winding. Some iron cores. This situation is particularly pronounced in low power motors because the commutator diameter and armature diameter are relatively close and the field winding axial dimension is relatively large.
