gerrr it helps if i paste the link http://www.instructables.com/id/Build-Your-Own-ELECTRIC-MOTORCYCLE/
On Fri, Feb 17, 2012 at 9:27 AM, paul annen <[email protected]> wrote: > 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. 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