Patent ID: 6914543

Claim:
A method for detecting an absolute rotational position of an electromechanical device or at least one component thereof comprising: using a pair of signals to determine a relative position of the electromechanical device or the at least one component thereof from a starting point; obtaining a commutation index signal; determining a first absolute position of the electromechanical device or the at least one component thereof based on the commutation index signal; obtaining a Z-index signal, wherein the position of the electromechanical device or the at least one component thereof is re-initialized when the Z-Index signal is detected, and the position the electromechanical device or the at least one component thereof is initialized by a commutation index signal before the Z-index signal is detected; and determining a second absolute position of the electromechanical device or the at least one component thereof based on the Z-index signal.