[ausev] experience no commutation

[Brian Lasseter]

On Fri, Dec 19, 2008 at 9:05 AM, Jim Watson <osious at gmail.com> wrote:
> What does it mean to say that AC motors experience no commutation over 2500
> rpm? Is a commutator a device that kicks in over a certain rpm in order to
> produce higher rpms. I have heard in some motors, when they are
> accelerating, a click, and the motor keeps accelerating until it tops out at
> design voltage or speed. I have also taken some motors apart that have this
> thing on the armature that looks like it is the culprit that makes that
> click sound. It has a spring that holds it off the contact points until the
> armature is spinning fast enough to make it engage that is when you hear the
> click. What is this for? It sounds a bit like the train motor config to me
> only way simpler. By the way the explanation of the train engine was
> EXTREMELY fascinating. I have always wondered how the hell that worked. Some
> day maybe we can make an 18 wheeler,.... (when batteries catch up)

I have no info on what you mean by commutation... My ADC 9" Brushed DC
electric motor is an extremely simple device:
http://en.wikipedia.org/wiki/Brushed_DC_electric_motor

There is a British company that already makes electric panel trucks to
get around the inner London toll charges on trucks... They do not make
18 wheelers though:  http://www.modeczev.com/


-- 
TTFN,
Brian "Lasso" Lasseter

"No Sane man will dance."   -Cicero (106-43 B.C.)