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

Claim 8:
9. A system for evaluating current sensor measurements of an electric machine system, comprising:
a processing module configured to acquire current sensor measurements from a first current sensor and a second current sensor connected to a three phase electric current supply to an electric machine, the first current sensor configured to measure a first phase current of the electric current supply, the second current sensor configured to measure a second phase current of the electric current supply, the processing module configured to perform:
acquiring a first current signal from the first current sensor;
acquiring a second current signal from the second current sensor;
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.