Capacitor Less Single phase Induction Motor: Shaded Pole Induction Motor Working and Application.

What is Shaded Pole Induction Motor? Working and Application of Shaded Pole Induction Motor.

There are different types of Induction Motors are available three phase as well as single phase. Single Phase Induction Motors are widely used in modern days. Shaded Pole Induction Motor is a single phase induction motor which can run without the capacitor that is why it is called Capacitor Less Single phase Induction Motor.

In this post, we are going to learn about Construction, Working, and Application of Shaded Pole Induction Motor. The construction and working of Shaded Pole Induction Motor are very simple.

Construction of Shaded Pole Induction Motor:

The Shaded Pole Induction Motor whose picture is shown in this article is collected from an old Refrigerator. We will discuss the applications of Shaded Pole Induction Motor.

      As you see in the above picture The Shaded Pole Induction Motor has a Main stator winding which is to be connected to the power supply during operation and Two Shaded winding or Shaded pole, a core, and a squirrel cage rotor.

The stator of the Shaded Pole Induction Motor has the salient poles. Each pole has their own exciting coil which are works by induction effect. 

STATOR of Shaded Pole Induction Motor:

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ROTOR of Shaded Pole Induction Motor:

Working of Shaded Pole Induction Motor:

                         Let's know how a Shaded Pole Induction Motor works. A rotating magnetic field is produced in the stator which causes the rotor to rotate. You may have a question of how rotating magnetic field is produced. Actually, the shaded coils or shaded poles create the rotating magnetic field. The effect of shading coils causes the main field flux to shift across the pole face from the unshaded portion to the shaded portion. 

                        The nature of this shifting flux lines is like a rotating field moving in the direction from the unshaded portion to the shaded portion. But one thing remembers that this rotating magnetic field not very strong like a three-phase induction motor. In the Shaded Pole Induction Motor, the working of rotating magnetic field only starts the rotor to rotate. 

                            When the rotor starts rotating an additional torque is developed by single-phase induction motor action. The motor ultimately attains a speed slightly less than synchronous speed and runs as single-phase induction motor.

Application of The Shaded Pole Induction Motor : 

As this type of motor is very simple of construction, they can be used in many places like small fans, Air conditioner, hair dryers, projectors etc. 

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