Other Parts Discussed in Thread: DRV10983, DRV10974
Hello,
We are running a 1.8" HDD motor (low voltage, low back EMF BLDC motor) with the DRV10983EVM but are experiencing the following issues:
- motor does not start at low speed inputs (does not run when input is approx. < 300)
- motor does not run at expected max speed (when speed input = 511, max speed measured by tachometer = 3500 RPM, max speed expected > 10,000 RPM)
- motor current draw is higher than expected (measured = 0.2 A, expected = 0.1 A)
- configuring motor to run is very sensitive to the control coefficient (only runs when control coeff. = 0.25)
We have followed most of the tuning guide provided for the DRV10983 but are still experiencing these issues. Below are screenshots of the DRV109XX GUI settings that run the motor best so far: