Power Supply - Linear or Swiching?

[dpaish]

Greetings.

For a Plasma CNC cutting system, if both Power Supply had the same output
voltage and power, which power supply would you use?

Linear:
http://cgi.ebay.com/48V-400W-CNC-Mil...r_W0QQitemZ37\
0189919351QQcategoryZ73152QQcmdZViewItemQQ_trksidZp4340.m183QQ_trkparmsZalgo%3DS\
ICDD%26its%3DI%252BC%252BS%252BIA%26itu%3DSI%252BUS-BWR%252BUCI%252BIA%252BUCC%2\
52BPSS%252BCRS%252BIT%252BUA%26otn%3D6%26ps%3D33

Switching: SPS-48-7
http://www.motiontek.ca/powersupply.html

Regards,
Dennis

[Torchhead]

Originally Posted by dpaish Greetings. For a Plasma CNC cutting system, if both Power Supply had the same output voltage and power, which power supply would you use? Regards, Dennis

The cheapest one Dennis. The switcher probably has current limiting to protect itself and downstream components. You can add external bulk capacitors to dampen the gain loop for running non-linear loads with a switcher. A lot don't even need that.

Tom Caudle
www.candcnc.com

[Al_The_Man]

The linear may cost a bit more, but are more rugged, if the switching one dies, they can be tricky to repair, you only have to lose one and then the linear cost would be ahead.
Another advantage is that if it has a Toriodal transformer, auxiliary windings are very easy to add, again lowering the overall cost.
Al.

[millman52]

take a look here http://www.antekinc.com/ps.html They have a PS for just about any application in the Home hobby CNC .

[Al_The_Man]

This is the guy that consistently list on ebay, I buy my Toroids from him, he will also custom wind I believe.
Al.