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:
Jun. 24, 2014
Filed:
Mar. 30, 2011
Manoel Soares, Natick, MA (US);
Manoel Soares, Natick, MA (US);
Bose Corporation, Framingham, MA (US);
Abstract
A method for pulse width modulation control of a multiple phase drive includes identifying at least one phase from the plurality of phases for the drive as eligible for clamping to one of a plurality of extreme power supply voltages, including excluding from the eligible phases those phases with intermediate control signal levels and excluding phases according to a proximity criterion on the control signal levels. A phase is selected from the eligible phases. An offset signal is determined as a difference between a control signal level for the selected phase and an extreme control signal level associated with one of the plurality of extreme power supply voltages. A modified control signal is determined for each of the phases, by forming a combination of the offset signal and a control signal level for each phase to determine the modified control signal for each phase.