why inductors are important ?

Answer 1

Inductors resist changes to current in an electrical circuit.

Inductors either air of metal core are coils of wire that produce an electromotive force measured in henrys. This force acts acts to oppose change in current.

The mechanical analogy would be a flywheel.

Answer 2

The number one reason would be the transformation of a specific potential difference (and phase structure if applicable)to the desired level and phase structure(if applicable)needed. That and they'll take more punishment under possible variations of input supply as well as any type of phase imbalance that could occur on the output side(i.e. higher tolerance levels.) yes in most cases now many electronic devices have swapped over to a digital type of switching power supply, problem(as with all electronic components) is the harmonic currents produced by these devices themselves, thus thats where tolerance levels become a very vitally important part of the equation. especially where there is heavy concentration of harmonic currents. The US is just beginning to experience an issue with this where the UK has been dealing with this very issue for quite some time. Good ways for helping to hinder and or eliminate this however is by introducing a good ground, and some type of shield(ie wiring protection on the power supply side to help also hinder EMI(Electromagnetic Intereference.) and the harmonic currents produced by the electronic components themselves. Ever wonder why it seems equipment that carries an energy star seal seems not to last as long as equipment built say(IN THE GOOD OLE DAYS)? Tolerance. I hope this helps you somewhat. The question then should be how do we keep efficiency high as well as having a greater tolerance so as to increase the life of a certain device? Because under normal circumstances higher tolerances reduce the probability of better efficiencies. But then how does one compensate for the variations created on the input side of this device. Surge arrestor and/or suppression maybe? Yet another electronic device.

Answer 3

Inductors doesnt have the property of sudden change of current.
on its operation it draws the negative sequence current whose propetry is emission of heat.
where ever heating opeartion is needed inductors are used.
Almost in all the windings inductors are used.
in every coil and current carring materials belongs to this category.

Answer 4

How you induce voltage?
How you gernerate force?
How you lag current?
All due to Inductors.