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:
Sep. 27, 2022
Filed:
Apr. 29, 2021
Applicant:
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Inventors:
Huazhen Chai, Caledonia, IL (US);
Mustansir Kheraluwala, Lake Zurich, IL (US);
Assignee:
HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/539 (2006.01); H02M 1/12 (2006.01); H02M 7/5395 (2006.01); H02M 1/088 (2006.01); H02M 7/537 (2006.01); H03K 3/017 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02M 7/5395 (2013.01); H02M 1/0025 (2021.05); H02M 1/088 (2013.01); H02M 1/12 (2013.01); H02M 7/537 (2013.01); H03K 3/017 (2013.01);
Abstract
A power system includes an inverter that convert a DC voltage to a three-phase alternating current (AC) voltage. One or more switch drivers generate a pulse width modulation (PWM) drive signal that drives the inverter. The power system further includes a controller that determines a modulation index associated with the PWM drive signal and injects a harmonic into the PWM drive signal in response to the modulation index exceeding a modulation index threshold value.