Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2008-01-16
2010-11-09
Wachsman, Hal D (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S057000, C702S079000, C702S089000, C702S117000, C702S127000, C702S199000
Reexamination Certificate
active
07831402
ABSTRACT:
A method for estimating values assumed at a certain instant of each period by currents flowing respectively in two distinct windings of a poly-phase load controlled in a space vector modulation (SVM) mode, using a same measuring device, may include coupling the measuring device to the first winding and measuring a current flowing therethrough with an anticipation from the certain instant smaller than or equal to an SVM half-period. The method may also include coupling the measuring device to the second winding, measuring a current flowing therethrough at the certain instant, coupling the measuring device to the first winding, and measuring a current flowing therethrough with a delay equal to the anticipation. The method may also include estimating a value assumed at the certain instant by the current flowing through the first winding based upon the two measured values with the anticipation and with the delay respectively.
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Richardson et al., “Implementation of a PWM Regular Sampling Strategy for AC Drives”, 1989, pp. 649-656.
Blasko et al, “Sampling Methods for Discontinuous Voltage and Current Signals and Their influence on Bandwich of Control Loops of Electrical Drives”, 1997, pp. 520-526.
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D'Angelo Giuseppe
Moselli Giovanni
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Henson Mi'schita′
Jorgenson Lisa K.
STMicroelectronics S.R.L.
Wachsman Hal D
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