# What is a Shaded Pole Induction Motor?

**URL:** <https://forumautomation.com/t/what-is-a-shaded-pole-induction-motor/13285>\
**Category:** Electrical\
**Tags:** motor\
**Created:** [May 29, 2025, 3:39pm UTC](https://forumautomation.com/t/what-is-a-shaded-pole-induction-motor/13285 "2025-05-29T15:39:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\
**Post date:** [May 29, 2025, 3:39pm UTC](https://forumautomation.com/t/what-is-a-shaded-pole-induction-motor/13285/1 "2025-05-29T15:39:38Z")

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> # What is a Shaded Pole Induction Motor?

A shaded pole motor is a type of self-starting, single-phase induction motor where a portion of a pole is shaded by a copper ring, creating a rotating magnetic field.

This “shaded ring” acts as a secondary winding, and the shading causes a delay in the magnetic flux in that part of the pole, enabling the motor to start.

 ![image](https://cdn.forumautomation.com/original/2X/f/f8c10dcf0a558254f9ee6485a77a5c7092029b86.jpeg)

**Here’s a more detailed explanation:**

> # Single-Phase Induction Motor

It operates on a single-phase AC power supply, unlike three-phase motors which typically require three phases.

> # Self-Starting

Unlike some single-phase motors that require an external starting mechanism, shaded pole motors can start on their own due to the shading effect.

> # Shading Ring

A copper ring or band is placed around a portion of the stator pole, creating a “shaded” area.

> # Rotating Magnetic Field

The shading effect causes a phase shift in the magnetic flux, creating a rotating magnetic field that drives the rotor.

> # Direction of Rotation

Shaded pole motors typically rotate in one direction, and reversing the direction is not possible.

> # Low power and Efficiency

These motors have relatively low starting torque and efficiency, making them suitable for low-power applications.