Originally Posted by
gilesa
"As an example the Forumslader has 5 stage load matching, which is switched by a microprocessor, plus a voltage booster at low speeds to maximise output. "
Trevtassie, Is it possible to post a reference to the source for that?
maybe the official english
manual/assembly instruction of the forumslader helps, on the last page is a circuit diagram given. 5 condensators are shown, as far as i understand this.
Regarding the dyno hubs:
Originally Posted by
steelbikeguy
This model agrees with my experience and what I've seen from other sources; i.e. a voltage source that is proportional to the dynamo angular velocity, in series with a fixed inductance and resistance.
Here is an article about dyno hubs from Winfried Schmidt (the engineer and founder of Schmidt/SON) incl. electrical models. (Sorry, again in german from Fahrradzukunft.de, google translated)
Originally Posted by
JohnJ80
From those charts, it’s probably prudent to plan on something less than the 5W peak output and factor that against the time you can ride per day
As trevtassie has said (and shown in the link) (and has been said and discussed before by me), you can significantly increase the output of a dynohub.
Hub dyno with 12 Ohm (equivalent to a 3W light system),
Hub dyno with 24 Ohm and
Hub dyno with forumslader. All links refer to fahrradzukunft.de