ironically this was in the next email i opened this morning. i havent read it yet, but i thought i would post
On Fri, Feb 17, 2012 at 9:25 AM, paul annen <[email protected]> wrote: > 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. 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.
