What happens to the electrical current in an induction motor as it approaches its operational speed?

As the induction motor approaches its operational speed, the electrical current decreases due to a phenomenon known as slip. In an induction motor, slip refers to the difference between the synchronous speed (the speed of the magnetic field) and the actual rotor speed. When the motor starts, there is a significant difference between these two speeds, resulting in a high slip. This high slip causes a large amount of current to flow into the motor to create the necessary torque for starting.

As the motor accelerates and its rotor speed increases, the slip decreases, leading to reduced rotor currents. Consequently, as the induction motor nears its operational speed, the current drawn from the supply reduces due to the decreasing slip, allowing the motor to operate more efficiently. The decrease in current helps to enhance the overall performance and reduce losses in the motor, making it more energy-efficient during normal operation.