Shaded pole motor is a simple self-starting AC single-phase induction motor

Shaded pole motor structure

The rotor and its related reduction gear train are wrapped in an aluminum, copper or plastic shell. The enclosed rotor is driven by magnetic force through the shell. This gear motor usually has a final output shaft or gear that rotates from 600 rpm to 1 hour per hour. /168 turns (1 turn per week). Since there is usually no clear starting mechanism, the rotor of a motor powered by a constant frequency power supply must be very light in order to reach the operating speed within one cycle of the power supply frequency. The rotor can be equipped with a squirrel cage to make the motor start like an induction motor. Pulled to synchronize with its magnet, there is no induced current in the squirrel cage, so it no longer functions in operation. The use of variable frequency control enables the shaded pole motor to start slowly and transmit more torque.

Shaded pole motor speed

The speed of the shaded pole motor depends on the design of the motor. The synchronous speed (the speed at which the stator magnetic field rotates) is determined by the frequency of the input AC power supply and the number of poles in the stator. The more the number of poles of the coil, the slower the synchronization speed, the higher the frequency of the applied voltage, the higher the synchronization speed, and the frequency and the number of poles are not variables. The common synchronization speeds of 60HZ motors are 3600, 1800, 1200 and 900 rpm. It depends on the number of poles in the original design.

in conclusion

Since the starting torque is very low and cannot generate enough torque to turn large equipment, shaded pole motors can only be manufactured in smaller sizes, less than 50 watts, low cost and simple, suitable for small fans, air circulation and other low torque applications. Through series reactance to limit the current and torque, or by switching the number of motor coil turns, the motor speed can be reduced.

Hangzhou Jinjiu Electric Co., Ltd. is a Shaded Pole Motor Manufacturer with a variety of Shaded Fan Motors. Welcome to visit our official website.