Attempting to drive 22 pole BLDC motor with Kt value 82. Phase to phase resistance is 7 ohms.
We are driving the motor with the EVM board and have had success with Open to Closed loop transition.
We desire to run the motor at low speeds 30-500 RPM and maintain a reasonable torque throughout the range.
It appears when at 60 RPM or lower the system will run but as soon as a small amount of load is applied, the calculated back EMF starts to rise and the motor faults out on Back EMF calculation. In the 200-300 range, the motor appears to deliver the torque we desire.
Are there options or settings that can be changed to improve the condition when running at low speeds?