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Adding Regen to DC? Not for range...

8004 Views 29 Replies 12 Participants Last post by  Overlander23
I live in the foothills of SoCal and I notice that while I drive any of my ICE vehicles, auto or stick, I use downshifting to control my speed. I do this for traffic or hills. Since I am seriously considering a DC electric conversion, I would like some resistance from the drivetrain when operating under zero throttle. I would use the transmission to select the amount of drag, lower gears for more deceleration, just the same as the ICE vehicles. My intended pack voltage will probably be 156V (48 lithium cells). I know that a controller will be needed to prevent overcharging, the max regen (charging) voltage should be no higher than 168V - 170V.

Since I typically care about efficiency, I don't want to just drag the brakes all the way downhill or approaching a traffic signal (I don't do that today in my Suburban, Fit, Insight or 914-V8). So for the sake of driveability, how can I get the conversion to feel more like a regular car? I'm not impressed with the AC systems that are available today, none seem to match the power of a WarP9 for a similar weight.

I've spent a day reading way too many threads that barely touch on the subject (please don't mention perpetual motion) and the only practical advice that I mined from all that has been the guy with the S-10 that rewound his own alternator. I was hoping that I could buy most of the components necessary to build a similar finished product. I'm not looking for a kit, just some sources for the major components. I'm also open to alternative strategies. Anybody else headed down this path before?

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If you use a Sep ex motor, frorm what I have learned, MAKE SURE it has Interpoles!!!!
Ok, so what sepex motor are your running?


I am not running ANY motor at the moment... I have a BIG sep Ex motor just sitting in my Garage.

I have read some SERIOUS debates and posts on here on the importance of interpoles for High voltage Sep Ex systems... It seems the consincous is that a Sep Ex system with out interpoles can be run at about 72 volts max...
:rolleyes: What kind of "BIG sep Ex motor"? Like I said ealier, the only Sep Ex motor specs that I've seen rated to 144V is the Kostov 268mm. I'm just trying to figure out what options actually exist...


It's one that I bought from a guy on this forum 10" motor ...I just don't have time to fool with it...It has an inverted spline shaft that I don't know what to do with. I have an 11 inch series, just out of the machine shop and a monster 13 inch like Tesseract's 13 inch except mine is the series version, his is the sepex version..

I sure wish I could figure a way to retro fit Interpoles in one of these things.....
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