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Shaded pole induction motor can be used for
Toys
Hair dryer
Circulator
All of above
All of above
A shaded-pole motor is a single-phase induction motor that achieves self-starting capability through copper shading coils placed around a portion of each salient pole ┬╖ It is a simple, highly reliable, and inexpensive motor with small starting torque and low efficiency ┬╖ Consequently, it is widely used in low-power, light-duty applications such as toys, hair dryers, and small circulators or fans.
A shaded-pole motor is a single-phase induction motor that achieves self-starting capability through copper shading coils placed around a portion of each salient pole ┬╖ It is a simple, highly reliable, and inexpensive motor with small starting torque and low efficiency ┬╖ Consequently, it is widely used in low-power, light-duty applications such as toys, hair dryers, and small circulators or fans.
NsтАЛ=P120fтАЛ тАФ Synchronous speed of the rotating field
╬жnetтАЛ=╬жunshadedтАЛ+╬жshadedтАЛ тАФ Total net flux causing phase split
When single-phase AC current flows through the main winding, it produces a pulsating magnetic flux ┬╖ This flux induces a voltage and resulting eddy currents in the short-circuited copper shading ring, causing the flux in the shaded portion of the pole to lag behind the flux in the unshaded portion ┬╖ This phase difference creates a weak rotating magnetic field directed from the unshaded segment toward the shaded segment, driving the rotor.
Direction of rotation is strictly fixed from the unshaded pole portion to the shaded pole portion.
Extremely low starting torque (about 50% to 100% of full load torque).
Very low efficiency ranging typically between 5% and 35%.
Requires no auxiliary centrifugal switch or external capacitor.
Extremely economical, simple, and robust construction
High reliability due to the absence of centrifugal switches or brushes
Very low power factor and efficiency
Non-reversible direction of rotation under standard design
Small electric fans and blowers
Hair dryers and personal care appliances
Toys, record players, and small circulators
Power output of shaded pole motors is usually very small, ranging from fractional watts up to around 1/20 hp (approx ┬╖ 40W).
Because toys, hair dryers, and small air circulators all require low power and low starting torque where manufacturing cost is a key driver, option D ('All of above') is correct.
D is correct тАФ Shaded pole motors are suitable for low power, low torque applications including toys, hair dryers, and circulators.
Remember that the direction of rotation in a shaded-pole induction motor cannot be reversed by simply reversing supply terminals; it always rotates from the unshaded pole region toward the shaded pole region.