Electronic Circuit and Method for Automatically Adjusting a Phase of a Drive Signal Applied to an Electric Motor in Accordance with a Zero Current Detected in a Winding of the Electric Motor

摘要

A motor control circuit and associated techniques can adjust a phase of a motor drive to keep a rotational reference position of an electric motor at the same relative phase as a zero current in a motor winding at different motor speeds and as the motor accelerates and decelerates. In some embodiments, a particular circuit and technique can be used to detect the zero current in the motor winding.