Thomas Shay wrote: > A good sepex controller is much more complicated than a > series motor controller, not simpler. It needs a section > similar to the series motor controller to control the sepex > motor's armature current. Another section is needed for the > sepex motor's field current. The field conrol section should > provide high field current for good starting torque and for > regeneration, weakening the field current for high speeds, > and reversal of the field current to reverse the motor. It > also needs to be programmable to allow setting it up for each > application and user's preferences. A good example > of a sepex controller is the Curtis model 1274 described at: > http://www.curtisinst.com/Uploads/DataSheets/A> CFEFE5.pdf > A > higher voltage, higher current version of the > 1274 and a > compatible motor could be a great sepex setup for EVs.
Oh. Somehow I thought I remembered reading sep-ex was simpler. (Certainly not the first time I got something backwards. ;^) > A feature of any good sepex controller that distiguishes it from > a simple series motor controller is programmability. My > Curtis 1231C has three adjustment pots which I've never touched. > A sepex controller needs adjustments > to set up field control, regeneration, speed control, etc. > The Curtis 1274 and other sepex controllers connect to a > seperate handheld programmer module or to a computer to set > up the controller to suit the application and the user's preferences. Sounds like this is a viable next step for someone who wants to improve on a series system, but doesn't want to deal with the cost/voltage/complexity of AC. Maybe not for my first EV, but I'll consider it for my next.... Chris
