Hi Shai,
Your understanding of the basic open loop startup is correct. Prior to spinning the motor position is either detected or set to a known position.
At slow speeds, you can continue to run in open loop. Running in open loop is not an efficient method of running the motor.
Running in closed loop also provides feedback such as locked rotor (no BEMF signal).
Your understanding of the basic open loop startup is correct. Prior to spinning the motor position is either detected or set to a known position.
At slow speeds, you can continue to run in open loop. Running in open loop is not an efficient method of running the motor.
Running in closed loop also provides feedback such as locked rotor (no BEMF signal).