Question 46Electricity & Electronics - Assistant Engineer

The correct answer is A) provide starting torque. The main purpose of the auxiliary winding on a split-phase, single-phase motor is to provide additional starting torque. The auxiliary winding is designed to produce a phase shift between the main winding and the auxiliary winding, which generates a stronger starting torque to overcome the initial inertia of the motor. This allows the motor to start and reach its operating speed more efficiently. The other options are incorrect because: B) keeping the motor running if the main winding fails is the purpose of a capacitor-start motor, not a split-phase motor; C) increasing the starting current is not the primary purpose of the auxiliary winding; and D) limiting the starting voltage is not related to the function of the auxiliary winding.