SLVSDN2E January 2018 – March 2021 DRV10974
When the motor accelerates to the target BEMF threshold, commutation control transitions from open-loop mode to closed-loop mode. During this transition, the motor is allowed to coast for one electrical cycle to measure Kt. The commutation drive sequence and timing are determined by the internal control algorithm, and the applied voltage is determined by the PWM-commanded duty-cycle input. The closed-loop acceleration and deceleration values are provided in Table 7-2.