In a multispeed motor, what function does the tapped field winding perform?

In a multispeed motor, the tapped field winding plays a crucial role in adjusting the speed of the motor. By having the field winding tapped at various points, the motor can change the current flow and the strength of the magnetic field produced. This variation in the magnetic field strength directly influences the rotational speed of the motor. When a different tap is utilized, it alters the field configuration, enabling the motor to operate at various speeds according to the load or required application. This capability is essential in applications that demand flexibility in speed control while maintaining efficient operation.

In contrast, other functions mentioned do not accurately describe the role of the tapped field winding. Increasing starting torque typically relies on design aspects like rotor structure or additional winding configurations, rather than the tapped field. Enhancing efficiency is an overall feature of motor design but not solely attributed to the tapped field. Lastly, providing overcurrent protection is generally managed through circuit breakers or fuses rather than through field windings. Hence, the contribution of the tapped field winding in enabling speed adjustment solidifies its significance in the context of multispeed motors.