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Ev Archive for June 2000
1551 messages, last added Wed Aug 08 18:48:52 2001

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To Inductor...or Not to Inductor...



Hi to all,

I am building the "Boat Anchor" battery charger. This will not be a bad boy 
charger. I have:

dual 240V input 20 amp variacs, stacked and connected as one unit
dual 600V 40 amp bridge rectifiers
heat sink
large fan
60 amp 600VAC 3 contact contactor
dual 25 amp F.L. circuit breakers (one for each variac)
four 400VAC 15 MFD capacitors, 
dual 400WVDC 1500 MFD capacitors
three analog meters
   AC amps, 0-50A
   DC amps, 0-50A
   DC volts, 0-300V

What do you think? Rich Rudman thinks I'll need a big inductor if I want to 
get 40 amps or so of DC out of this charger. I thought the variac might be 
enough inductance. I was going to add some AC capacitance across the line 
input to the variacs to try to improve power factor. If an inductor would 
help where in the circuit would it be most effective?

Any suggestions or sources for info would be greatly appreciated.

Thanks,

Rich Brown
San Jose, CA
Dualin'7