Ok I can see how it might not make sense. you would have to know more about the motors in question. the motors I am referring to are a line of brushless motors from BMC (http://bmcus.com/bldc.htm
) and MAC(http://www.macmc.com/macbmchome.htm
) that have the controllers built in. I am aware of the external stepping controllers you are referring to for brushed motors as I have 5 different ones w/different configs. These motors are NOT the same. you only need power and a 5k ohm Pot to operate these MAC/BMC ones. and I do understand that MAC/BMC do make motors with/for external controllers (obviously)... and brushed motors too. but never mind all those other ones.....
What I have learned is that several of these motors (specifically the 24v 600w MAC motor) have been designed around much higher specs, but used downsized controllers in them instead for whatever reason (probably quality control). If you look at this page (http://www.thesuperkids.com/600wahspsuto.html
) what you are actually seeing is this product (http://www.thesuperkids.com/600wasutocum.html
) which has been factory by passed and relabeled as a 1000w brushless and controllerless motor, paired up with a custom 3rd party controller. I confirmed this with superkids personally. The controller they are selling comes from this company (http://www.crystalyte.com/Control.htm
) which are designed for wheel hub bike motors (brushless again of course).
What I would like to do is to basically copy what superkids are doing (http://www.thesuperkids.com/600wahspsuto.html
). Why? I have access to a bunch of these motors with burned out internal controllers... AND why repair them when I can 'upgrade' them by bypassing the burned out (presumably) internal controllers and rewiring them for one of these external controllers (http://www.crystalyte.com/Control.htm
from what I have gathered on wiki (http://en.wikipedia.org/wiki/Brushless_ ... tric_motor
), these are sensorless motors (non hall-effect). but aside from having taken several electronics classes in highschool and collage and some educated guessing, I dont really know where to start with out schematics or something. I'm going to take apart one of these to see what I am looking at. I did find another post of someone trying to do this but its a little old and not very useful.(http://visforvoltage.org/forum/8729-nee ... ment-63997
). I might just be able to repair it... which would certainly be cheaper.... but easier? not sure yet.
does this clear it up a bit?