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All this talk of controllers reminds me that I have a 1204X-4407 controller (data sheet and manual here: http://curtisinstruments.com/?fuseaction=cProducts.dspProductCategory&catID=11
I connected it to 36V through a 250 ohm resistor and the B+ and B- came up as advertised. I haven't done anything else. And I'm not likely to use it, so the first $125 gets it, shipping in the US included. And I'll give it a 2 month warranty in case there is something wrong with it. I believe it came out of a forklift that was scrapped. Harry Landis > From: etpost drmm net > To: elec-trak cosmos phy tufts edu > Date: Sun, 30 Dec 2012 11:24:36 -0500 > Subject: (ET) Controller current capacity (was Elec-trak Digest, Vol 10, Issue 201) > > On 30 Dec 2012 at 10:09, Robert wrote: > > > What I will have to do is figure the maximum current just before the > > breaker pops and add 50% to this to make the circuit durable. > > I'm no expert, but I'd say youi'll need at least that much and probably > more. IIRC, when Alltrax was designing the ET controller, they started with > a 200 amp (peak) current limit and after some testing increased it to 300 > amps. > > FWIW, most folks who design controllers have large piles of silicon that's > given its life in the design process. It seems to involve a lot of loud > bangs and, now and then, smoke and flames. > > > > _______________________________________________ > Elec-trak mailing list > Elec-trak cosmos phy tufts edu > https://cosmos.phy.tufts.edu/mailman/listinfo.cgi/elec-trak |