Paul B Jordan

US Patent:

6914543, Jul 5, 2005

Filed:

Jun 3, 2002

Appl. No.:

10/160862

Inventors:

John H. Floros - Novi MI, US
Nick Sarafopoulos - Taylor MI, US
Paul T. Jordan - Lincoln Park MI, US

Assignee:

Visteon Global Technologies, Inc. - Dearborn MI

International Classification:

H03M001/22

US Classification:

341 2, 341 11, 341 35

Abstract:

A method for detecting an absolute rotational position of an electromechanical device or the at least one component thereof comprising determining a first absolute position of the electromechanical device or the at least one component thereof based on a commutation index signal, obtaining a Z-index signal, and determining a second absolute position of the electromechanical device or the at least one component thereof based on the Z-index signal. The method initially determines a coarse rotational position of the electromechanical device such as a rotor or steering wheel based on the commutation index signal. When a device's position is first initialized by a commutation index signal before the Z-index pulse is detected, the device's position is re-initialized upon detection of the Z-Index pulse to provide a more accurate absolute device rotational position.