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:
Mar. 21, 2000
Filed:
May. 06, 1999
J Stephen Thorn, Florissant, MO (US);
Arthur E Woodward, Manchester, MO (US);
Emerson Electric Co, St. Louis, MO (US);
Abstract
A device and method for providing three-phase pulse-width modulated sine waves includes an inverter including first, second and third legs, and first and second PWM generators, the first PWM generator is coupled to selectively provide an output to the first inverter leg or the third inverter leg, and the second PWM generator is coupled to selectively provide an output to the second inverter leg or the third inverter leg. The first PWM generator provides an output to the first inverter leg during first and second 120.degree. segments of a 360.degree. electrical cycle, and the first PWM generator provides an output to the third inverter leg during a third 120.degree. segment. The second PWM generator provides an output to the third inverter leg during the first 120.degree. segment, and the second PWM generator provides an output to the second inverter leg during the second and third 120.degree. segments, thus providing generation of three-phase pulse-width modulated sine waves using fewer than three pulse-width modulators.