- #1
NGuy
- 1
- 0
Hi all,
I want to resonantly charge a capacitor, i.e. using a coil and diode combination instead of a resistor, in a very short period, which means a high current at high frequency.
The problem is the coil. I read that at high frequency AC you get to deal with the skin effect, and also the proximity effect, which cause the current to be concentrated in the outer layer of the conductor. This would strongly increase the actual resistance of the coil when compared to DC conditions, and I would need to use large diameter hollow tubing instead of wire to get an acceptable resistance value.
So I’m not really clear if these effects apply to my coil. On the one hand the current *is* strongly time-variant (a half sine wave); on the other hand it never changes direction: it’s still DC. Does anybody know if skin and proximity effects do or do not apply to pulsed DC?
Thanks
I want to resonantly charge a capacitor, i.e. using a coil and diode combination instead of a resistor, in a very short period, which means a high current at high frequency.
The problem is the coil. I read that at high frequency AC you get to deal with the skin effect, and also the proximity effect, which cause the current to be concentrated in the outer layer of the conductor. This would strongly increase the actual resistance of the coil when compared to DC conditions, and I would need to use large diameter hollow tubing instead of wire to get an acceptable resistance value.
So I’m not really clear if these effects apply to my coil. On the one hand the current *is* strongly time-variant (a half sine wave); on the other hand it never changes direction: it’s still DC. Does anybody know if skin and proximity effects do or do not apply to pulsed DC?
Thanks