On 12/9/2014 1:46 PM, andy pugh wrote: > On 3 December 2014 at 15:46, Dave Cole <[email protected]> wrote: >> If you want a power supply that you can install, power up and have a >> fair expectation of it lasting 25+ years I would go with an Acopian >> linear power supply. > I have had a chat with them, and it looks like about £300 for a PSU > for this application. > > I am wondering, though, if it might not be a better idea to use a very > simple transformer/rectifier/cap PSU. The solenoid coil seems rather > indifferent to the quality of power, it works down to 5V and probably > wouldn't melt at 50 V. Currently it has a duty cycle of 1.5 A for > 100mS every 30 seconds. A £300 PSU for that seems overkill. > > The problem seems likely to be finding a cap that can smooth 1.5A at > 50Hz but that will also last a long time.
Did you check Ebay for Acopian power supplies in the UK? If you can do with an unregulated supply perhaps a overbuilt linear power supply with multiple fused caps would work. Just protect the heck out of it with heavy diodes etc and buy high quality caps. 300 pounds is not cheap but amortized over 25 years it seems a lot more reasonable. :-) Dave --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
