BorgWarner has been granted a patent for a method to evaluate current sensor measurements in an electric machine system. The method involves acquiring current signals, determining machine velocity, shifting signals, calculating amplitude differences, and assessing measurement plausibility based on the differences. GlobalData’s report on BorgWarner gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on BorgWarner, Turbocharger bearings was a key innovation area identified from patents. BorgWarner's grant share as of February 2024 was 65%. Grant share is based on the ratio of number of grants to total number of patents.

Electric machine system current sensor measurement evaluation method

Source: United States Patent and Trademark Office (USPTO). Credit: BorgWarner Inc

A recently granted patent (Publication Number: US11927662B2) discloses a method and system for evaluating current sensor measurements in an electric machine system. The method involves acquiring current signals from sensors, measuring machine speed, shifting the current signals using a signal processing component with a tuning parameter based on machine speed, estimating phase differences, and determining the plausibility of the measurements. By comparing the phase difference to a threshold value, the system can assess the accuracy of the sensor measurements and evaluate sensor functionality.

Furthermore, the system includes a processing module that performs similar functions as the method, including assessing sensor plausibility and operating status based on the phase differences. The signal processing component is designed to shift current signals independently of frequency and without affecting amplitude, utilizing an all pass filter with a first-order transfer function. The tuning parameter is determined based on machine speed frequencies, enhancing the accuracy of the evaluation process. Overall, this patent introduces a comprehensive approach to evaluating current sensor measurements in electric machine systems, ensuring reliability and accuracy in assessing sensor performance.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.