Hi team,
My customer have a demand that: because the quality of BLDC motor which they uses, the hall sensors have large deviation and need to be corrected by software. So they need to monitor the time when BEMF reaches 0 and correct the hall sensors.
I find that DRV8343 does not sense BEMF, but I would like to know whether it is possible to achieve this demand by MCU algorithms.
Thanks!
Hi Iris,
Absolutely, you can sense BEMF of phase voltages using a comparator or first order differential equation.
Here are some resources to help sensor BEMF through MCU algorithms:
BLDC Selection Guide - https://www.ti.com/lit/SLVAES1
Sensorless Trapezoidal - https://www.ti.com/lit/pdf/slvub12
TI Precision Labs on Motor Control - https://training.ti.com/node/1139742?context=1139747-1138777-1139742
Thanks,
Aaron
