Borgwarner Inc.

James R Smith

Caleb Wayne Secrest

A method of evaluating current sensor measurements of an electric machine system includes acquiring a first current signal corresponding to a first measurement of a first phase current of a three phase electric current supply to an electric machine, and acquiring a second current signal corresponding to a second measurement of a second phase current of the three phase electric current supply. The method also includes determining a machine velocity, shifting the first current signal by a signal processing component to generate a shifted first current signal having a shifted phase, the signal processing component including a tuning parameter that is a function of the machine velocity, calculating an amplitude difference between the shifted first current signal and the second current signal, and determining a plausibility of the first measurement and the second measurement based on the difference.

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Levittown, PA, United States of America

James R Smith