Patent ID: 11927662
Assignee: BORGWARNER INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 16:
17. A computer program product comprising a computer-readable memory that has computer-executable instructions stored thereupon, the computer- executable instructions when executed by a processor cause the processor to perform operations comprising:
acquiring a first current signal from a first current sensor, the first current signal corresponding to a first phase current of a three phase electric current supply to an electric machine, the first phase current separated from a second phase current by a selected phase separation;
acquiring a second current signal from a second current sensor, the second current signal corresponding to the second phase current;
measuring a machine speed;
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 speed, the signal processing component including an all pass filter configured to shift the first current signal using the tuning parameter;
estimating a phase difference between the shifted first current signal and the second current signal; and
determining a plausibility of the first measurement based on the difference.