QUESTIONS re: MEGA-WATT 33-AMP POWER SUPPLY
This critter can be found on eBay. It is a switching type power supply. Supposed to have an ultimate amperage potential of 33, voltage adjustment of 10, to 15, and work fine as a long term battery ...
Forum Discussion
Without having a unit to inspect, or a schematic, it's anyone's guess as to why the output can't be paralleled.
My guess is they don't support paralleling because of poor protection of the output stage... if the voltage between unit A and unit B is off by even a few millivolts, it would either trip some sort of fault detection circuit, or blow the output transistor.
I wonder... you could run the output of each through its own diode (schottky or something equally fast), then combine those diodes on a large filter cap. This would offer some protection for the output stage, but you'd still want to be very wary of voltage differences between thw two. Also, it would cost you 0.7 to 1 volts off the output depending on the diode, which might be a problem if the max output is only 15v.
Opening up the units, it may be possible to gang the feedback circuit, so each smps chip monitors the paralleled output voltage, and adjusts accordingly, rather than each chip doing its own thing.
Some ideas here: http://www.codemsys.com/SMPS/Parallel.htm
My guess is they don't support paralleling because of poor protection of the output stage... if the voltage between unit A and unit B is off by even a few millivolts, it would either trip some sort of fault detection circuit, or blow the output transistor.
I wonder... you could run the output of each through its own diode (schottky or something equally fast), then combine those diodes on a large filter cap. This would offer some protection for the output stage, but you'd still want to be very wary of voltage differences between thw two. Also, it would cost you 0.7 to 1 volts off the output depending on the diode, which might be a problem if the max output is only 15v.
Opening up the units, it may be possible to gang the feedback circuit, so each smps chip monitors the paralleled output voltage, and adjusts accordingly, rather than each chip doing its own thing.
Some ideas here: http://www.codemsys.com/SMPS/Parallel.htm
