In a single phase induction motor driving a fan load, the reason for having ___

In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve

A. low starting torque.
B, quick acceleration.
C. high efficiency.
D. reduced size.

Show Answer

Answer: A

Share your understanding of this question with the correct explanation.

The reason for having a high resistance rotor in a single-phase induction motor driving a fan load is to achieve low starting torque (option A).

In single-phase induction motors, starting torque is inherently low due to the absence of a rotating magnetic field. The high resistance rotor is used to further reduce the starting torque, as it limits the flow of current in the rotor circuit during starting. This reduced starting torque is desirable in fan applications where a gentle start and low initial load are desired to avoid excessive mechanical stress on the fan blades and motor.

Having a high resistance rotor helps in achieving a smooth and controlled start, preventing sudden jerks or high starting currents. It allows the motor to gradually accelerate and reach its operating speed, suitable for driving fan loads.

Therefore, option A, low starting torque, is the correct answer.