very true, and i also imagined that the reserve battery would also function as the starting battery. with a 24v or higher system, i would recomend replacing the starter with one made for the higher voltages.
it might make the bike feel totally different, but what about putting your hub motor in the front wheel? On Thu, Feb 16, 2012 at 12:49 PM, Kurt Nolte <[email protected]>wrote: > I was actually imagining it going the other way, not sure why I didn't > make that clearer. I envision the motor pack also being the starting > battery, as well as the reserve battery. > > One or two 12V cells would be devoted as the "stock" battery, and with a > little coding one could even let the pack controller use the 12V alternator > to recondition cells as life goes on. Any retrofit package for this would > likely include a rewound alternator, however. > > I realize not all bikes have a rear drum hub, but then not all bikes have > a chain drive either so that wouldn't be universal either. My target market > is still largely drum rears, and it would be easy to swap a drum rear wheel > on those with only disc brakes back there; there are many options, factory > and aftermarket. > > Kurt. > On Feb 16, 2012 12:35 PM, "paul annen" <[email protected]> wrote: > >> 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. >> > -- > 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. 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