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Author Topic: What is the power factor of resonance  (Read 13600 times)

gsmsslsb

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  • Posts: 77
What is the power factor of resonance
« on: December 27, 2010, 05:22:50 AM »
Just a question.
If I put a capacitor in series with an inductor and a resistive load.
The capacitor being sized correctly to resonate at a given frequency.
If I can achieve resonance what would be the power factor across a resistive load.
At first I thought the power factor must be 1
as to achieve resonance capacitive reactance must equal inductive reactance but now I am not so sure. >:( >:(
Any help would be greatly appreciated.
Thanks GSM

fritznien

  • Sr. Member
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  • Posts: 294
Re: What is the power factor of resonance
« Reply #1 on: December 27, 2010, 05:33:56 AM »
you were rirgt the first time, Xc=Xl Z=R for series.
the source sees only the R, I is in phase with E.
the C and L still have their own phase angles.

fritznien

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  • Posts: 294
Re: What is the power factor of resonance
« Reply #2 on: December 27, 2010, 05:36:19 AM »
reading the question again, the phase angle on a resister is always zero.

gsmsslsb

  • Jr. Member
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  • Posts: 77
Re: What is the power factor of resonance
« Reply #3 on: December 27, 2010, 08:41:55 AM »
To rephrase the question.
Can the power factor of a resonant circuit be anything other than 1

fritznien

  • Sr. Member
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  • Posts: 294
Re: What is the power factor of resonance
« Reply #4 on: December 27, 2010, 07:27:31 PM »
no.