Re: Motors comparison page updated

Hi Brian,

> Thank you! Surprising that with as easy as it is to backdrive, that the
> efficiency is as low as it is.

I was surprised too. I suspect a relatively high internal resistance of the
windings, rather than mechanical friction, as the source of losses. No, (shame
on me!) I didn't checked yet with an ohmmeter.
>
> Out of (not idle) curiosity, is it possible to drive even more current-hungry
> devices safely from the NXT? I need a way to drive a 120V AC, 15 amp device
> under NXT control (I need to be able to cycle it on/off rapidly with a variable
> duty cycle, to control average power output).
This is clearly outside of my own SOA there
(http://en.wikipedia.org/wiki/Safe_operating_area)! Are you sure that duty cycle
modulation works with this kind of AC motor? You would need to synchronize with
mains... Or - to keep it simple and safe - you might try to control the dial of
a powerful light gradator with a NXT motor?

Philo