[SOLVED] how to calculate the ESR of the AC capacitor

[HI12345]

I measured the voltage and current waveforms of the capacitor under 80V ac 50Hz


Can I calculate ESR and actual capacitance directly ?

 

[KlausST]

Hi,

if you have phase angle phi or cos(phi), then yes.


Klaus

 

[FvM]

Depends on the ratio of Xc to Resr. If it's large (Z mostly reactive), you'll have problems to measure the phase angle between voltage and current with sufficient accuracy. It also depends on your available equipment.