1-7
1.2.2 Principles of the motor
When a motor is connected to a source of power, current ows through the stator winding, or stator coil, within
the motor, which creates a rotating magnetic eld. This rotating magnetic eld causes the stator (rotor) to rotate.
Motor speed is proportional to the frequency of the power source.
Basically, the motor rotates by electromagnetic force.
Fan
Core
Rotor
Frame
Coil
Structure of the motor
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