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. 19, 2017
Filed:
Mar. 07, 2014
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Alex Seguritan, San Diego, CA (US);
Ravishankar Piramanayagam, San Diego, CA (US);
HAMILTON SUNDSTRAND CORPORATION, Windsor Locks, CT (US);
Abstract
Embodiments are directed to modulating a pulse width modulation (PWM) signal, by initializing at least one phase index to an initial value, establishing a set of values in a lookup table that correspond to data points for PWM comparator values that correspond to a given number of samples of a single periodic waveform during a predetermined sampling rate that establishes a table resolution, repeatedly executing the following operations at the predetermined sampling rate: determining a value of a command signal frequency, setting a value to a jump factor equal to the quotient of the value of the command signal frequency divided by the table resolution, progressing the value of the phase index by the value of the jump factor, selecting a value of a commutation vector from the lookup table that corresponds to the phase index, and loading the value of the commutation vector into a corresponding PWM comparator.