Hi team,
1. When the motor is coasting, the phase current should flows through parasitic diode of MOSFET. So the voltage on U,V,W should be either 0V or VCC. Is it right?
2. The spin direction is judged by zero crossings of the BEMF voltage, so what the UVW represents in following picture?
3. What's the meaning of "±" in the comparators?