Carlos Guillermo ,wrote
I ordered 4 of those motors. They look nice, but I missed the fine
print
about them being brushless!
This model senses the rotor position from extra tracks on the
encoder wheel,
instead of the hall sensor setup I'm familiar with. Can you point
me to the
brushless motor control chips you mentioned, and maybe also an
appnote
sample circuit?
Thanks,
Carlos Guillermo
I did the same thing myself,after checking back I found that there
was no fine print about them being brushless in the catalog,only on
the data sheet,live & learn as they say.Anyway after finding out what
I had I started looking for a
driver solution
here are some of the options Im looking at now
brushless DC motor controller
Unitrode UC3626 or UC3625 sold by Texas insturments
$4.53-$5.15 from Arrow Electronics
Motorola MC33035 $3.36 Arrow
Allegro A3932SEQ or A3933SEQ(both drive high side mosfets
directly)$5.81
still looking motorola looks ok unitrode or allegro starting to look
better
high side driver
Intersil HIP4083(3x) or HIP4086(6x) $3.65 & $7.17 Arrow
power amp (all n-channel)
Texas insturments TPIC1310 3-HALF H-BRIDGE (2.5A continuous 12A pulse)
$3.60ea from
there are a lot of options out there from other makers,most will read
ttl level encoders &/or hall inputs,check the data sheet to be sure
some take a PWM speed input most like a voltage level,all the ones
Ive seen so far need a direction+speed input,almost all of the data
sheets have examples using a switch for direction & a pot to set the
speed(stand alone use)
the option Im working on is
PC->DAC+8255->UC3625->HIP4086->TPIC1310->motor then
encoder->LS7266R1->PC
price on a 4 axis setup adds up fast but is still 1/4 what a
comercial kit is going for most places
btw arrow seems to be mostly an oem dealer but if you bug them enough
they will sell "samples"
hope this helps
BFP
