What is the horsepower range of shaded pole motors?
They are built in power sizes up to about 1⁄4 horsepower (190 W) output. Above 1⁄3 horsepower (250 W), they are not common, and for larger motors, other designs offer better characteristics.
How do I identify a shaded pole motor?
How do I identify a shaded pole motor? This motor can be identified by using an auxiliary winding which is made up of a copper ring called a shading coil.
What is the advantage of a shaded pole motor?
The shaded pole induction motor produces a very small starting torque about 50% of full load torque. The efficiency of the shaded pole motor is low because of continuous power loss in the shading coil. It is suitable for small devices which require low starting torque.
What is the smallest shaded pole motor size in HP?
Shaded-pole motors are best suited to low-power household application, because the motors have low starting torque and efficiency ratings. Because of the weak starting torque, shaded-pole motors are built only in small sizes ranging from 1/20 to 1/6 hp.
Is a shaded pole motor efficient?
The efficiency of shaded pole motors generally is only between 15 and 30%. And the power factor is rather low as well. A low power factor and efficiency is probably ok for applications where there is only one small fan (shaded pole motors are generally 40 W or less).
What is the shaded pole in a shaded pole motor?
A Shaded Pole motor is an AC single phase induction motor. The auxiliary winding, which is composed of a copper ring, is called a shading coil. The current in this coil delay the phase of magnetic flux in that part of the pole in order to provide a rotating magnetic field.
What is the difference between shaded pole and PSC motors?
Shaded pole motors use alternating current (AC) applied sequentially around the stator ring to generate an almost rotating magnetic field. Permanent split capacitor (PSC) motors use a capacitor in one of the windings to increase the current lag between the two windings to make the rotor turn.
Who invented the shaded pole motor?
Barber-Colman
A reversible shaded-pole motor was made by Barber-Colman several decades ago. It had a single field coil, and two principal poles, each split halfway to create two pairs of poles.
How does a shaded pole motor operate?
A Shaded Pole motor is an AC single phase induction motor. The auxiliary winding, which is composed of a copper ring, is called a shading coil. When power is applied to the stator, the flux in the main part of the pole induces a voltage in the shading coil, which acts as a transformer secondary winding.
What is the speed of a shaded pole motor?
A shaded pole motor is a type of induction motor, just using some neat magnetic tricks to generate a second phase. It runs at slightly below synchronous speed, the slip depends on the torque. For a simple 2 pole motor, you’d expect it to run at perhaps 90% of 3000 rpm (50 Hz countries), or 3600 rpm (60 Hz).
Is shaded pole motor a single-phase?
Definition: A shaded pole induction motor is a simple single-phase induction motor, which is self-starting with one of the poles shaded by the copper ring.