The working principle of the motor commutator

 When coil by current, under the action of a permanent magnet, turn through the attraction and repulsion, when it turn to balance and magnet, the original electric line is corresponding with electric contact patches on the commutator I leave, and brush connected to the group that accord with steam coil corresponding contact, so keep repeating, dc motor turns up.

    If there is no commutator, the motor can only turn less than half a circle is card died, only as a brake. Using the centrifugal force generated during the motor rotation as the power, the starting resistance can be controlled to reduce the starting current of the motor, increase the starting torque, and realize the brushless automatic operation of the wound asynchronous electrical idea.

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