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Engineering
Electrical Engineering
Correcting power factor without affecting active power.......
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[QUOTE="Rive, post: 5676833, member: 324024"] Let's take a simple example. If the PSU in your PC draws 460W, that would mean 2A at 230V. Of course, PC power supplies has power factor correction these days. Without correction that PSU would draw 575VA (not W, but VA!), in case the power factor // cos(theta) is 0.8. Since the voltage is the same 230V, it would mean 2.5A current. So, we can say that in this case the PFC reduced the current to 2A from 2.5A, with the effective power remaining 460W. The very meaning of the PFC is that you modify the cos(theta) from 0.8 to 1 (so theta will change). PS.: In PC PSUs the correction is done with electronics these days, not with transformers or simple additional inductive/capacitive elements. [/QUOTE]
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Correcting power factor without affecting active power.......
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