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Main - Components for DC Motors

  • Motor Housing Assembly (stator)
    1. Metal Housing - A metal case to house the magnets and bearings and fix the endcap. It is also responsible for producing a magnetic field using the magnets to chart the flow of magnetic force.
    2. Bearing - This component supports the shaft that is part of the armature assembly and also provides lubrication for the shaft to turn with less friction.
    3. Magnet - The permanent magnet is the key component in producing a magnetic field which in turn produces torque or the turning force of the motor.
    4. Spring Holder - This component fixes the magnet to the housing
  • Armature Assembly (rotor)
    1. Commutator - The commutator commonly uses copper segments and more recently, graphite. This component comes in contact with the brush to allow curreont to flw through the armature and is responsible for the direction of the current to shift as it spins and slides in contact with the brushes.
    2. Lamination Stack - Composed of stamped sheet metal called laminations, the lamination stack has slots for the magnet wire windings where current can flow.
    3. Magnet Wire - Magnet wires are used as windings for the armature. d. Shaft - The shaft is where the mechanical output characteristics of the motor are measured such as speed and torque. The whole idea of the motor is to provide rotational motion to the shaft.
  • Endcap Assembly
    1. Brush Holder - This component holds the brush in place and provides electrical insulation from the metal housing.
    2. Endcap - The endcap is a stampedmetal part that holds the bearing in place and strengthens the plastic brush holder. The terminals protrude through the endcap.
    3. Terminals - Usually in pairs, the terminals are the electrical input contacts of the motor.
    4. Brush - The brush, usually composed of carbon material, enables electrical current to flow from the terminal to the armature as it slides in contact with the commutator while the armature assembly is rotating.
    5. Brush Leaf - This component holds the brush and enables the brush to slide and come in contact with the commutator at just the right amount pressure.