Hey guys! Hate to be the fool that asks this question, but I was wondering when I should choose to use an inductor and when it is best to use a capacitor. They both hold electrical charge and can hold lots of it. Is it ever okay to replace an inductor with a similar charge cap? Dave, maybe you could do a blog on inductors to go with your capacitor show. I know I would watch it!
Hey guys! Hate to be the fool that asks this question, but I was wondering when I should choose to use an inductor and when it is best to use a capacitor. They both hold electrical charge and can hold lots of it. Is it ever okay to replace an inductor with a similar charge cap? Dave, maybe you could do a blog on inductors to go with your capacitor show. I know I would watch it!
They both hold electrical charge and can hold lots of it.
So basically what I'm getting is that these two have different applications. Such as an inductor could be used to smooth a signal in a wire and a capacitor could be used to filter the ripple of a rectified AC supply because the inductor wouldn't have much loss in a signal where they are supposed to be connected while a capacitor has no electrical connection between the leads so it has less loss when they aren't supposed to be connected together. Right?
An inductor resists changes in the electrical current flowing through it.
A capacitor resists changes in the voltage applied across it.
An inductor is good for smoothing tipple on a constant current power supply.
A capacitor is good for smoothing ripple on a constant voltage power supply.
Find a good book on,or Google for,"Basic Electrical Theory"!!
In practice both L &C are used in all types of power supplies,as the L in series,C in parallel setup is a low pass filter,In the case of a DC supply,
No!
The difference in loss is just due to the construction of real world components,real world inductors are made from lengths of wire,wound into a coil.
wire has resistance,hence the inductance looks like it is in series with a resistor.
The internal resistance of capacitors is very much less, due to their construction.
ESR of capacitors and inductors does not come from DC resistances but from skin effect, intercoil interferences,
inductance of leads, etc.
ESR of capacitors and inductors does not come from DC resistances but from skin effect, intercoil interferences,At low frequencies most of the ESR is mostly due to the DC resistance of the coil for or the plates and electrolyte of an electrolytic capacitor and is very significant for high value components. The ESR of a large 10,000uF capacitor can be measured at 1kHz which is too low for the skin effect to be prominent and the ESR 100mH choke can be measured at DC.Quoteinductance of leads, etc.The inductance is a separate measurement to the ESR, it's the ESL (Effective Series Inductance).
Just stumbled across this -
Also consider that capacitors may appear in series -or- parallel, depending on their role. Inductors are always in series with the load.
Just stumbled across this -
Also consider that capacitors may appear in series -or- parallel, depending on their role. Inductors are always in series with the load.
*Cough*
So what about transformers?
Tim
So basically what I'm getting is that these two have different applications.
Such as an inductor could be used to smooth a signal in a wire and a capacitor could be used to filter the ripple of a rectified AC supply
because the inductor wouldn't have much loss in a signal where they are supposed to be connected while a capacitor has no electrical connection between the leads so it has less loss when they aren't supposed to be connected together. Right?
Just stumbled across this -
Also consider that capacitors may appear in series -or- parallel, depending on their role. Inductors are always in series with the load.
Parallel inductors see occasional use in antenna impedance-matching networks, when you want to efficiently transfer RF from a source (transmitter) to a load (antenna) with a particular impedance mismatch. See, for example:
http://www.giangrandi.ch/electronics/shortanttuner/shortanttuner.shtml