How is voltage sensing and current sensing implemented?

Thread Starter

rfengineer28

Joined Apr 28, 2021
79
Hello all, I am working on an h-bridge circuit to drive a motor, however, I would like to be able to sense the voltage on my dc bus rail to detect an over-voltage and be able to report it back to my mcu and activate the braking resistor. Could I receive feedback as to how to accomplish voltage sensing?
 
Last edited:

Dodgydave

Joined Jun 22, 2012
11,395
Yes use a voltage divider with a couple of resistors,..
as for the current you need a low resistance in series with the motor low side, and monitor the voltage across it..or a shunt monitor.
 
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