Gene Heskett schrieb: /snip/ > But I wanted something at about 40 volts for the lathe & wound up making an > unregulated linear for 10% of the cost of a switcher at the time. Loaded > up, its doing about 37 volts so I missed my target, but it gets the job > done, moving the lathe at very good speeds. The linear runs hotter, but > both are working well. > > Cheers, Gene > Gene, large iron cores of the size you are working with have more than one volt per turn which makes it easy to add some extra voltage. So why not thread a foot or so of copper wire (or stranded cable) more through the yoke to come up to your desired 40 volts? Living largely of junk yard material, I did this several times. I f there was no room left for wires, I took a lenght of thin copper strip cut from old tube shieldings and soldered to lenght, and added two or three turns to the secondary in order to increase the output voltage. To a 2 kW, 10 volts transformer I added two turns of rather heavy rain drain copper sheet to boost it up to 12.5 volts for an instant car starter (plus a selenium rectifier of the good old kind which can take starter current). Insulate with wax paper or preferably temperature resistant PTFE caulking tape or glass fiber foil.
Peter ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
