you are correct that higher volts will require less amps to do the same work (watts is watts is watts), and i do like the retrofit option, you could also fairly easily use that rear break to do some regenerative functions as well. but not all bikes have the option of a rear wheel hub design, you might be better off driving off the existing chain. this way you could also incorporate it as a chain tensioner.
are you imagining using the bikes charging system? we all know that these are weak links in the vintage hondas (another side note was a thought to have a small 30amp automotive alt mounted on the swing arm with a sprocket to bypass the rectifier, spring pull the tension on the alt and you have an automatic chain tensioner) On Thu, Feb 16, 2012 at 12:25 PM, Kurt Nolte <[email protected]>wrote: > 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. > -- 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.
