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Registered Member #3395
Joined: Thu Nov 04 2010, 08:42AM
Location: Christchurch, New Zealand
Posts: 193
I saw a thread somewhere else on 4hv about calculating the resonant capacitor value, involving the inductance of the transformer maybe? Correct me if I'm wrong.
Is it something like the reso cap value is half the inductance of the tranny? I'm not sure but I need clarification thanks.
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Józef C wrote ...
"and the frequency you're looking for" - Isn't this the mains 50Hz in my case?
Are there any ways of calculating inductance if you don't have an inductance function on your DMM?
There are, but the simplest way requires a signal generator and osilloscope.
You connect a capacitor of known value in parallel with the unknown inductance, you usually also connect a resistor in series with this circuit, then you connect the two ends to the sig. gen. and connect the 'scope across the capacitor/inductor, and adjust the sig. gen. until the amplitude indicated on the 'scope is at a maximum.
This is the resonant frequency of the inductor/capacitor. from here you can work out the inductance.
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Calculating resonant capacitor values
