The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 2025
Filed:
May. 13, 2022
GM Global Technology Operations Llc, Detroit, MI (US);
Vinod Chowdary Peddi, Shelby Township, MI (US);
Song He, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method to suppress tonal noises over a wide speed range in an alternating current electric machine by current injection and voltage injection is provided. The method includes, within a computerized processor, monitoring a position sensor measuring a current electric machine frequency of the electric machine, comparing the current electric machine frequency to a sampling frequency of the position sensor, and operating one of a current injection mode and a voltage injection mode to suppress the tonal noises in the electric machine based upon the comparing.