Find Coil Resonance with Lissajous

166

03:53:48

a coil of wire has interwinding capacitance that behaves like a parallel capacitor.  this makes the coil into an LC circuit, and it will resonate at some frequency. 

Watch the XY plot and shift the frequency of the AC source to see the effect of the phase shift on the LC circuit.  While the two signals are out of phase, the XY plot shows all sorts of shapes. When the AC source frequency matches the coil's resonant frequency, both signals will be in phase, and the XY plot will be a single diagonal line on the scope. 

https://www.google.com.au/url?sa=t&source=web&rct=j&ei=sBzTVIXGGo-78gXo-4GIDw&url=http://www.syscompdesign.com/assets/Images/AppNotes/guitar-pickups.pdf&ved=0CB0QFjAB&usg=AFQjCNHrdM-r2WLIjYrl_M2a3LFILbgMyA&sig2=rRAocOtNSiZjLk4A5mg9rQ

published 11 years ago

jose1979

11 years ago

very good explanation

serhatatpl

11 years ago

Very good

faceblast

11 years ago

yeah it took me about a week to work out all the goddamned drivel and wade through the maths to work out the simple explanation of what's happening here.

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