LAUNCHXL-F280025C: Universal Motor Control Lab: Hall Sensored-FOC vs Sensorless-FOC

Hi Eyal,

The HALL routine is similar to trapezoidal control, so it may naturally be more noisy at certain motor speeds.

Eyal Kurz said:

However, when switching to Hall-sensored FOC (enabling the MOTOR1_HALL and HALL_CAL flags), I’m experiencing significantly increased noise. The motor does spin, but there’s a noticeable ripple sound that isn’t present during sensorless operation. I also tried enabling the MOTOR1_FAST flag alongside the Hall sensor flags to see if it would improve the performance, but the issue persists.

Have you properly run the calibration routine for the HALL algo? This requires running FAST and HALL together. It considers placement of the digital HALL sensors around your motor.

I'll share a couple things below which may help you:

1. See lengthy and on-going discussion on improving the HALL routine in the E2E below. 
   1. https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1400217/tms320f280025c-need-sinusoidal-current-with-hall-sensor-feedback-on-universal-motor-control-project-getting-step-type-current-with-audible-noise-as-of-now-on-my-ebike-hub-motor 
2. Attaching some test data in ppt form comparing sensorless FAST and HALL start-up, also on how to improve it.
   1. UMCL_MOTOR1_HALL_testing_07-26-2024.pptx

Best,

Kevin

Hey Kevin, thanks for the response.
I'll go through the resources you provided and see if it results in any performance improvement.

Thanks,
Eyal