Sounds like a good idea for a Range Extended Battery Electric, which I feel is probably where the auto industry is going to head, for better or worse.
I like the modular idea, especially the ability to add/subtract and hot-swap battery packs. One of my primary ideas would actually be to devise a "retrofit" package to hybridize most bikes with minimally invasive common parts. The core concept its the use of a "hub" or "internal stator" motor design, pressed into place of the rear drum brake. This allows for a direct drive DC design, high torque and the ability to run electric-only for a time. Rear braking would now be electric, using a variable resistor to determine braking load, tied to the stock brake pedal. The motor controller's speed sensor would allow for ABS functionality without additional parts, as a bonus, and the whole motor assembly shouldn't add more than a pound or two, tops. Using this, I'd also downsize the engine, generally by a 1/3 but obviously dependant on the individual bike. The motor torque added in the bottom end of the range would allow riders to feel like the engine its much bigger. I think that both motor and pack should operate at high voltage, preferably 36-72+V. This will allow for smaller, more flexible wires and also provide a beneficial bump in torque. The pack can still be be charged by a 12V alternator using the right connections and isolator circuits. High voltage packs are also better for the controllers, limiting max current flow. That's it from me for now, when I'm on a proper keyboard I'll add more. Kurt On Feb 16, 2012 10:42 AM, "paul annen" <[email protected]> wrote: > > well, my idea was to use as many stock Honda parts as i could, so that i could market it to honda after. i also want to use a 24v system. this is to make the charging system easy. motor controller and basic battery set on the chassis with modular extra batteries in saddle bags and a "trunk" with the engine and mobile charger (also modular). my engine/mobile charger is about as simple as it gets, small engine (can offer diffrent engine sets for gas, diesel, LP.... ) set at a constant rpm coupled to a 24v automotive alt (yes they make them, mostly for bigger trucks). > > the modular thought is that if your daily commute is short enough you dont need the extra weight (and wear) from the engine and batteries, simply plug it in to charge, but longer commutes the extra batteries might be needed, for longer trips you will want to have the engine for "on the road" charging. yes, while cruising you will probably use more power then the alt can keep up with, but if you stop every so often (and leave the charging engine running) you can build charge back up. > > my first concept was using standard car batteries, (i was 12, cut me some slack) now i am thinking that li ion makes a much better choice, but thats also where the modular design comes in, as battery tech improves, you can upgrade without scrapping the whole bike. > > not that ive spent any time thinking about this at all.. comments and suggestions are welcome.. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
