[Noisebridge-discuss] Bike generator or alternator?

[Robert Benson]

The link states that "A real rectifier characteristically drops part of the
input voltage (a voltage drop, for silicon devices, of typically 0.7 volts
plus an equivalent resistance, in general non-linear)". So my concern of
"loss" at the diodes appears exaggerated. Thank you.


On Thu, Aug 28, 2014 at 7:08 PM, Joseph Brenner <doomvox at gmail.com> wrote:

> "Still not clear on cause of alternator being more efficient when half
> it's cycle is blocked by diode(s). "
>
> I was envisioning "full wave rectification":
>
>   https://en.wikipedia.org/wiki/Rectifier
>
> Where the sine wave then gets turned into a series of connected mcdonalds
> arches.
>
>
>
>
>
> On Thu, Aug 28, 2014 at 2:33 PM, Robert Benson <sf99er at gmail.com> wrote:
>
>> Thx for the info & link. Looks like the NC25A Charge Controller may be
>> better than a voltage regulator if you dump excess to aux battery. Still
>> not clear on cause of alternator being more efficient when half it's cycle
>> is blocked by diode(s). Anyway, I think I'll get an alternator instead of
>> the generator I was planning to get. Thx again. Cheers
>>
>>
>> On Thu, Aug 28, 2014 at 1:53 PM, Joseph Brenner <doomvox at gmail.com>
>> wrote:
>>
>>>  [image: Boxbe] <https://www.boxbe.com/overview> Joseph Brenner (
>>> doomvox at gmail.com) is not on your Guest List
>>> <https://www.boxbe.com/approved-list?tc_serial=18399858929&tc_rand=1604010631&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&token=xpZwUAoWDENJLoGjCOaFjk3MlpEkBWX%2FhtO74K8V650Z%2BTl5zy2e7jl3cr%2BtUlMk&key=W9Ja%2BLt%2FMzTpGNNVkX3%2B7ZNifWjEaS3Sn74QGpUz2wo%3D>
>>> | Approve sender
>>> <https://www.boxbe.com/anno?tc_serial=18399858929&tc_rand=1604010631&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&token=xpZwUAoWDENJLoGjCOaFjk3MlpEkBWX%2FhtO74K8V650Z%2BTl5zy2e7jl3cr%2BtUlMk&key=W9Ja%2BLt%2FMzTpGNNVkX3%2B7ZNifWjEaS3Sn74QGpUz2wo%3D>
>>> | Approve domain
>>> <https://www.boxbe.com/anno?tc_serial=18399858929&tc_rand=1604010631&utm_source=stf&utm_medium=email&utm_campaign=ANNO_MWTP&utm_content=001&dom&token=xpZwUAoWDENJLoGjCOaFjk3MlpEkBWX%2FhtO74K8V650Z%2BTl5zy2e7jl3cr%2BtUlMk&key=W9Ja%2BLt%2FMzTpGNNVkX3%2B7ZNifWjEaS3Sn74QGpUz2wo%3D>
>>>
>>> Typically, a "generator" implies it's DC output, and an "alternator"
>>> implies the output is AC.
>>> To charge a battery, you need to "rectify" the output from an
>>> alternator to fake DC, but
>>> that's more efficient because you get to use the full cycle.
>>>
>>> There's a bunch of other issues... you probably want a "deep discharge
>>> marine/rv" battery--
>>> and the last time I messed with this kind of thing, there was no good
>>> substitute for Sears Die Hards--
>>> and you'll want some sort of voltage regulator to keep from
>>> overcharging...
>>>
>>> There's a bunch of web pages like this around that talk about this stuff:
>>>
>>>
>>> http://www.doityourself.com/stry/how-to-charge-a-12v-battery-with-an-exercise-bicycle
>>>
>>> On Thu, Aug 28, 2014 at 10:20 AM, Robert Benson <sf99er at gmail.com>
>>> wrote:
>>> > I'm building a 12v bike generator out of a stationary bike exercise
>>> stand.
>>> > Does anyone (jake) know if a car generator or alternator is better or
>>> what
>>> > the differences are in output? thx
>>> >
>>> > _______________________________________________
>>> > Noisebridge-discuss mailing list
>>> > Noisebridge-discuss at lists.noisebridge.net
>>> > https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
>>> >
>>>
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.noisebridge.net/pipermail/noisebridge-discuss/attachments/20140829/9787e40d/attachment.html>