What is The Speed Control of Three Phase Induction Motor?

What is The Speed Control of Three Phase Induction Motor?

Three-phase induction motor

A three-phase induction motor is an electromechanical device that operates primarily at a constant speed unless a specific control method is used.

V/f control

By maintaining a constant voltage frequency (V/f) ratio, this method effectively controls the speed of the induction motor while preventing core saturation.

Rotor and stator control

Speed adjustment can be made from the rotor side, by increasing the resistance or using slip power recovery, or from the stator side by changing the number of poles or adjusting the voltage.

Torque dynamics

The torque of the motor is affected by voltage, resistance and slip, which are key factors in all speed control technologies.

Efficiency considerations

Although speed control is universal, methods such as increasing rotor resistance or changing stator poles reduce overall motor efficiency and increase operating costs.