Measure stepper motor instantaneous voltage

[RafaelFalcaro]

Hello, I would like to measure the instantaneous voltage (in a PLC, for example) that is on the phases of a stepper motor through the PowerPMAC registers, would it be possible?

I can currently measure the current like this:

m1_current = sqrt(pow(Motor[1].IaMeas,2)+pow(Motor[1].IbMeas,2))*(33.85/32768)

 

[leandro.martins]

As far as I know, there isn't a measured voltage directly, since only the currents are necessary to close the current-loop.

I think what could be done is using the IaVolts/IbVolt/IcVolts (depending on your system), that are the PWM carriers; or the IqVolts/IdVolts. Both of these approaches only provide you the commanded voltage.