# Reactive Power

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• #10198

Hi Dear engineers,

﻿Is it true if i say” the only usage of reactive power is generating the flux needed for ferromagnetic circuits such as transformers, motors, ballasts, etc” ? I hope you can help me understand the real meaning of reactive power. :)

#11343

yap sort off.. few engineer likes to describe as a beer glass.. where active power is the beer itself, while the reactive power is the bubble.. its there, but not really sufficient to energize your load, where active power needed the most..

#11364
#11369

Hi Dear engineers,

﻿Is it true if i say” the only usage of reactive power is generating the flux needed for ferromagnetic circuits such as transformers, motors, ballasts, etc” ? I hope you can help me understand the real meaning of reactive power. :)

Hi,

Reactive power has no usage because it is a purely mathematical concept.

Ferromagnetic devices are inductive circuits. This means that the current is mostly in quadrature with the voltage. As the Reactive power is the product of the voltage times the quadrature component of the current, (See the post “How to illustrate Reactive Power“) that’s why reactive power is present in these circuits.

#12397

Reactive power is used to excite the circuit i.e. it is only the conversion of electrical energy into magnetic field energy(in case of inductor)

and electric field energy(in case of capacitor). Ideally if there is no resistance in the inductor then whole of the electrical energy is converted into magnetic and in this case pf is 0.

hope the text if you read was useful to you.

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