Final answer:
The stator in a resistance split-phase motor creates a magnetic field that interacts with the rotor to produce motion, while also being a source of power dissipation due to its resistance, which heats up according to the square of the current passing through it.
Step-by-step explanation:
The stator is a vital component of a resistance split-phase motor. The stator generates a magnetic field that interacts with the rotor, enabling the motor to turn. In such motors, electric currents pass through coils or windings on the stator, producing a rotating magnetic field. This magnetic field creates torque on the rotor, resulting in motion. However, during operation, back electromotive force (back emf) is induced in the coils, which opposes the driving emf and is directly proportional to the motor’s angular velocity.
The significance of the stator’s resistance lies in its potential for power dissipation. Since the power lost as heat in the motor is proportional to the square of the current through the resistance (P : I²R), it is important to consider when analyzing motor efficiency. Moreover, minimizing losses such as eddy currents is crucial, and is typically accomplished by laminating the iron core of the stator. Such construction significantly reduces resistive heating without greatly affecting the core’s magnetic properties.