Here is a question I am sure someone knows the answer to. For modern can motor drives using a DCDS or equivalent, I believe that for one direction +ve is put to one motor pole and -ve to the other. Then this polarity is reversed to change engine direction. My question is do these voltages reference to ground (ie: one is +ve from ground, the other -ve from ground), or are they floating with no reference to frame ground at all? Anyone know?
Thanks, Rod
Replies sorted oldest to newest
They are floating, do NOT ground either motor lead or bad things happen!
@gunrunnerjohn posted:They are floating, do NOT ground either motor lead or bad things happen!
Yah I figured that. I was just looking to simplify using motor power to trigger an opto, by grounding one opto pin and connecting the other to only one power wire to the drive motor. Guess that won't work! But hey, thanks!
Rod
It's just two wires and a resistor, be brave! 
@gunrunnerjohn posted:It's just two wires and a resistor, be brave!
And a cap! 
Guess you'll need a filter, correct.
Access to this requires an OGR Forum Supporting Membership
