Patent ID: 11349418

Abstract:
The invention relates to a method for cranking an internal combustion engine, including the steps of: (a) receiving a start signal; (b) determining an initial position of the rotor with respect to a stator phase winding; (c) applying a pulse-width-modulated signal to the stator winding corresponding to determined initial position of the rotor; (d) determining a threshold value of the stator current variation; (e) measuring current of the stator winding in response to applied pulse-width-modulated signal to determine current variation; (f) if current variation is more than the threshold value, determining updated rotor position, applying a pulse-width-modulated signal to the stator winding corresponding to the updated rotor position; and repeating steps (d)-(f); and (g) if current variation is less than the threshold value, applying a pulse-width-modulated signal to the stator winding corresponding to the last updated rotor position and repeating steps (d)-(g).