Method and apparatus for identifying an operational phase of...

Details Method and apparatus for identifying an operational phase of... Method and apparatus for identifying an operational phase of...

2004-11-24

2008-08-12

Wachsman, Hal D (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C318S484000

Reexamination Certificate

active

07412339

ABSTRACT:
A method for identifying an operational phase of a motor may include obtaining a first value of a signal that is indicative of the operational phase of the motor and obtaining a second value of the signal after a period of time has expired. The method further includes identifying a first operational phase of the motor if the second value exceeds the first value by a non-negative first threshold value. A second operational phase of the motor is identified if the second value does not exceed the first value by the first threshold value. The first and second operational phases may correspond to relative positions of a motor's rotor and stator, such that periods of energization may be identified for producing motoring or regenerative torque.

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Brynielsson, “Method and Device in Vehicle Control System, and System for Error Diagnostics in Vehicle”, Aug. 17, 2000, IPN WO 00/47885.

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