DC Motor Description

Permanent magnet Electric Motor also by the stator poles, rotor, brush, shell and other components, the use of permanent magnet stator pole ferrite, Alnico, NdFeB and other materials. Based on its structure can be divided into the cylinder block and other types. In most of the cylindrical magnet electric, electric tools and equipment in the special block the most common type of motor vehicle use of magnets used in video recorders.

Rotor commonly used silicon layer, more of the electromagnetic rotor DC motor controller of the small number of slots. In most low-power motor 3-slot tape recorder, a more upscale or 7 slot slot. Around the rotor core between two slots (3 slots, there are three windings) enameled wire, sheet metal being welded joints on the commutator. Power brush and rotor windings connected conductive parts with conductive and wear two types of performance. Permanent magnet brush motor using a single piece of metal or metal graphite brushes, electric graphite brushes. Permanent magnet DC motor used in video recorders, high speed electronic circuits or centrifugal devices.

Therefore, the armature upon rotation, the brush with the commutator to effect commutation of the current, direct current alternately flow from the conductor ab and cd, so long as the coil at the N pole side, the one passed by the electric current direction is always a brush into the direction of, and under the S pole, always out in the direction B from the brush. This ensures that each side in the very next coil current is always in one direction, the direction to form a constant torque, the motor can be continuously rotated. This is the DC motor works.