Hi
Electric ballast is used in florescent and neon lamps to limit the current to avoid lamp burn out.
An inductor is used to do this job, but a disadvantage of using it is reducing the power factor.
To solve this problem, a capcitor is added to circuit to improve PF.
I did some calculations and figured out that adding the capacitor balances the total reactance of the circuit, hence invalidates the effect of the inductor in limiting current.
At first, I did calculations for a series RL circuit with 220V rms voltage source ,R=20,L=0.1H.
After that, I added a 0.01mF capacitor in series, so the total reactance becomes almost zero.
I don't what my question should be, but I need someone to explain what happens when adding a capacitor?
Electric ballast is used in florescent and neon lamps to limit the current to avoid lamp burn out.
An inductor is used to do this job, but a disadvantage of using it is reducing the power factor.
To solve this problem, a capcitor is added to circuit to improve PF.
I did some calculations and figured out that adding the capacitor balances the total reactance of the circuit, hence invalidates the effect of the inductor in limiting current.
At first, I did calculations for a series RL circuit with 220V rms voltage source ,R=20,L=0.1H.
After that, I added a 0.01mF capacitor in series, so the total reactance becomes almost zero.
I don't what my question should be, but I need someone to explain what happens when adding a capacitor?
