Arghhhhh stoopid internet canna find dc brushless circuit

[headhunter]

Seriously, I've spent a couple hours trying to find a layout of how a dc brushless circuit works.  I've read lots of descriptions and understand how it works but as a visual person I still need to see it work.  Anyone know of any flash animations or animated gifs or even static representation of what's going on with the transistors and hall probe on a dc brushless motor??  Yep searched this site too...

Hopefully thanks in advance.

Ivan.

[Peppyy]

I can't seem to find any animations but here is a great site about dc and circut parts etc.

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/dccircon.html#c1

[RP]

Try this:

  [Animated gif

[RP]

Dohh!  New to html tag formatting.  Try this instead:

http://www.servomag.com/flash/4-pole/smi-motor-gif.htm

[Roamer195]

The simplest circuit just uses a hall-effect device to do the same job as a commutator would normally do.

In other words, put the hall-effect device across the collector-base connection on a transistor (darlington style).

Then the trsnsistor collector-emitter is connected in series with the DC source and the stator winding(s).

If I may ask, what are you planning to do with the motor?

[Opera House]

As they said in Firesign Theater, "Sometimes you can't tell the AC's from the DC's."  Rather than marking position and turning on a coil, many motor designs are just 2, 3 or more phases and are driven at a constant frequency. Basically AC motors.  No reason to put in sensors you don't have to.