Why Is It Called a Shaded Pole Motor?
A shaded pole motor is called so because of its design that includes a shading coil, which creates a shaded area on the surface of the pole of the motor.
The shaded pole motor is a type of single-phase AC induction motor. It consists of a stator with main and auxiliary windings, and a rotor with a shaded pole. The shading coil is wrapped around part of the pole, creating a shaded area.
When the motor is powered, an alternating current flows through the main winding, creating a magnetic field that rotates around the stator. The magnetic field induces a current in the shading coil, which creates an opposing magnetic field in the shaded area of the pole.
This opposing magnetic field causes a phase shift in the magnetic field, creating a rotating magnetic field that drives the rotor to turn. The shading coil allows the motor to start rotating and provides it with a rotating torque.
Thus, the term "shaded pole" comes from the shading coil wrapped around part of the pole, which creates the shaded area on the surface of the pole.
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