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:
Dec. 09, 2014
Filed:
Jul. 14, 2011
Ling Qin, Houston, TX (US);
Bilal Akin, Stafford, TX (US);
Ling Qin, Houston, TX (US);
Bilal Akin, Stafford, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method for driving a motor having a plurality of phases is provided. Initially, first, second, and third intervals for a pulse width modulation (PWM) period from first and second voltage commands are generated. The first and second voltage commands correspond to a voltage vector for the motor, and the voltage vector has an associated sector. A conversion formula is then determined for the first, second, third intervals based on the associated sector for the voltage vector. Using the conversion formula and the first, second, and third intervals, fourth, fifth, and sixth intervals are generated, and a set of PWM signals for the PWM period is generated from the fourth, fifth, and sixth intervals. The motor is then driven with the second set of PWM signals, and a current traversing the plurality of phases with a single shunt is measured.