Understanding Induction Motors & Reactive Power

[hisham.i]

I was reading about induction motors and speed controller(self commutated inverters for cage motor), and i didn't understand this sentence:"The induction motor can either absorb or deliver reactive power".

Thanks for any help.

 

[sophiecentaur]

The power (or rather, the energy) involved in speeding up the armature is stored in the rotation - rather than lost, doing work on the motor load and friction. This energy can be returned as the armature slows down. The power can be regarded as 'reactive' because it is not dissipated - in the same way as the reactive energy used to magnetise an inductor or to charge a capacitor can be returned to the source.

 

[oswaler]

I can explain that reactive power is a component of electrical power that does not perform any useful work, but is necessary for the operation of certain types of electrical equipment, such as induction motors. Induction motors use a combination of active and reactive power to generate a rotating magnetic field, which is necessary for their operation. The statement you mentioned means that induction motors have the capability to either consume or produce reactive power, depending on the load and operating conditions. This is important to consider when designing and controlling the speed of an induction motor, as it can affect the overall efficiency and power consumption of the motor. I hope this explanation helps clarify the concept of reactive power in relation to induction motors.