Hi All,
I need to put together a simple circuit that will drop the voltage from a transformer i have down to suit the input for some servo amplifiers.
My input is from an 80VAC 2.6KVA transformer and I require 70-80VDC at 30 amps. I have used a bridge rectifier (36MB10A) and 3 x 22000uF 100V caps in parallel to smooth the output to give 118VDC.
One simple circuit would be to use an amplified zener circuit but with the high output current requirement, even with a darlington pair, the second transistor would melt down.
Any and all thoughts on what would be the simplest (cheapest) circuit are greatly appreciated.
Thanks,
Colin Holloway
I need to put together a simple circuit that will drop the voltage from a transformer i have down to suit the input for some servo amplifiers.
My input is from an 80VAC 2.6KVA transformer and I require 70-80VDC at 30 amps. I have used a bridge rectifier (36MB10A) and 3 x 22000uF 100V caps in parallel to smooth the output to give 118VDC.
One simple circuit would be to use an amplified zener circuit but with the high output current requirement, even with a darlington pair, the second transistor would melt down.
Any and all thoughts on what would be the simplest (cheapest) circuit are greatly appreciated.
Thanks,
Colin Holloway