Hello,
I'm controlling a BLDC motor with MCSDK 6.0.0 and IHM08M1, with FOC with 1024 PPR encoder. I compute torque (Iq_ref) commands to achieve speed control, this works ok except in rare case described below:
Sometimes the MCSDK seems "stalled":
- I send a torque (Iq_ref) command, but the motors does not run
- The motor can mechanical spin freely (not blocked, I can spin it manually). Even I I release completely the load, is does not spin.
- Encoder feedback is ok (the MCSDK return a speed if I turn the motor manually)
- The PI current loop and the PWM regulation seem running since the read Iq value oscillates around the Iq_ref I set. Some current is flowing since the MOSFET are a little (be reasonably) hot.
- No fault flag is set
- Resetting the controllers solves the issue.
Why such behaviour could appear ?
Any clue ?
NB: this seems to occurs when I set a torque command to move the motor starting from 0 rpm.
Thanks,
