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  • Appliances Repair in MD

  • Appliances Repair in MD

      The axle holds the armature and the commutator. The armature is a set of electromagnets, in this case three. The armature in this motor is a set of thin metal plates stacked together, with thin copper wire coiled around each of the three poles of the armature. The two ends of each wire (one wire for each pole) are soldered onto a terminal, and then each of the three terminals is wired to one plate of the commutator.

    Appliances Repair in MD
    The final piece of any DC electric motor is the field magnet. The field magnet in this motor is formed by the can itself plus two curved permanent magnets.
    One end of each magnet rests against a slot cut into the can, and then the retaining clip presses against the other ends of both magnets.

  • Appliances Repair in MD

  • Appliances Repair in MD
    The axle holds the armature and the commutator. The armature is a set of electromagnets, in this case three. The armature in this motor is a set of thin metal plates stacked together, with thin copper wire coiled around each of the three poles of the armature. The two ends of each wire (one wire for each pole) are soldered onto a terminal, and then each of the three terminals is wired to one plate of the commutator.

  • Appliances Repair in MD

  • Appliances Repair in MD
    The final piece of any DC electric motor is the field magnet. The field magnet in this motor is formed by the can itself plus two curved permanent magnets.
    One end of each magnet rests against a slot cut into the can, and then the retaining clip presses against the other ends of both magnets.

  • Appliances Repair in MD
  • Appliances Repair in MD
    Armature, Commutator and Brushes
    Consider the image on the previous page. The armature takes the place of the nail in an electric motor. The armature is an electromagnet made by coiling thin wire around two or more poles of a metal core.
    The armature has an axle, and the commutator is attached to the axle. In the diagram to the right, you can see three different views of the same armature: front, side and end-on. In the end-on view, the winding is eliminated to make the commutator more obvious.

  • Appliances Repair in MD
  • Appliances Repair in MD
    You can see that the commutator is simply a pair of plates attached to the axle. These plates provide the two connections for the coil of the electromagnet.
    The “flipping the electric field” part of an electric motor is accomplished by two parts: the commutator and the brushes.

  • Appliances Repair in MD
  • Appliances Repair in MD
    Commutator and brushes
    The diagram at the right shows how the commutator and brushes work together to let current flow to the electromagnet, and also to flip the direction that the electrons are flowing at just the right moment. The contacts of the commutator are attached to the axle of the electromagnet, so they spin with the magnet. The brushes are just two pieces of springy metal or carbon that make contact with the contacts of the commutator.

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    Appliances Repair in MD


    Appliances Repair in MD

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