The normal, asymmetrical form of these types of motors (pictured) has only one winding, with no capacitor as well as starting windings/starting switch, [4] building them economical and reliable. Larger and more modern types could possibly have multiple physical windings, though electrically just one, and a capacitor may be used. Because their starting torque can be low, they are perfect to driving fans or other loads that are easily started. They could possibly have multiple taps near one electrical end with the winding, which provides variable swiftness and power by offering of one tap during a period, as in ceiling fans. Moreover, they are appropriate for TRIAC-based variable-speed controls, which often are employed with fans. They are built in power sizes as long as about 1⁄4 horsepower (190 W) expenditure. Above 1⁄3 horsepower (250 W), it isn't common, and for more substantial motors, other designs offer better characteristics. A most important disadvantage is their low efficiency of around TWENTY SIX %. [5] A major advantage would be that the motor's stall current should be only slightly higher than your running current, so there is lower risk of severe over-heating as well as tripping the circuit protection when the motor is stalled for whatever reason. Since the current in the secondary winding of a transformer is out with friends of phase with the present in the primary winding. The current in the shading coil has gone out of phase with the current in the main field winding. Thus, the flux from the shading pole is from phase with the flux from the main pole. https://www.ykfanmotor.com/Shaded-Pole-Motor-pl3163572.html