Electricity: motive power systems – Armature circuit control – Plural – diverse or diversely controlled – armature or primary...
Reexamination Certificate
2007-11-26
2010-11-16
Benson, Walter (Department: 2837)
Electricity: motive power systems
Armature circuit control
Plural, diverse or diversely controlled, armature or primary...
C318S494000, C318S714000, C318S720000, C318S801000
Reexamination Certificate
active
07834574
ABSTRACT:
In various embodiments, a phase current sampling apparatus (300, 600, FIGS.3, 6), an electric motor drive system (100, FIG.1), and a motor vehicle (1200, FIG.12) include switching circuitry adapted to receive first and second phase current waveforms. The switching circuitry provides the first phase current waveform during at least two offset sampling instants, and provides the second phase current waveform during a reference sampling instant. An analog-to-digital converter is adapted to sample the first phase current waveform at the offset sampling instants, and to sample the second phase current waveform at the reference sampling instant. An embodiment of a method for regulating phase current waveforms includes an analog-to-digital converter generating samples of a first phase current waveform at sampling instants that occur before and after a reference sampling instant, and generating a sample of a second phase current waveform at the reference sampling instant.
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Hiti Silva
Schulz Steven E.
Welchko Brian A.
West Stephen T.
Benson Walter
Dinh Thai
GM Global Technology Operations Inc.
Ingrassia Fisher & Lorenz P.C.
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