I plan to use one of these old PMC controllers in my conversion (until it blows up). Here's the schematic if any one is interested. It does indeed use transistors, at 1kHz chopping frequency. Makes AM radio interference that sounds like a Harley Davidson - how's that for an audible EV?
http://4.bp.blogspot.com/-DPY4sZajcTA/UPlnYhw-uOI/AAAAAAAAALY/ZkpKU-eMQ0M/s1600/CurtisPMC.png I used it previously for 4 1/2 years in a rebuilt Jet Electra. It's getting old but the insides still look very clean. I imagine I should worry about the electrolytic caps being dried out but I think I'm just going to let it ride. -Chris > The earliest PMC controllers I've ever seen were all transistor, not SCR. > They used big darlington transistors. hey make the motor "whistle" like an > SCR controller, though they are a bit smaller and more efficient, as they > don't have the big inductors and capacitors. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130118/5c6f91dc/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
