Why are end rings or rotor conductors fitted to the rotor of a squirrel cage motor?

End rings or rotor conductors are fitted to the rotor of a squirrel cage motor to facilitate the flow of current and create a magnetic field necessary for the motor's operation. They connect the individual rotor bars at both ends, forming a closed circuit that allows the induced currents to circulate effectively. This design enhances the efficiency and performance of the motor by enabling it to generate torque and maintain rotational speed under varying load conditions. Additionally, it helps in minimizing electrical losses and improving the overall reliability of the motor.