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:
Apr. 17, 2007
Filed:
Apr. 02, 2003
Applicants:
Jonathan R. Knight, Tokyo, JP;
Akihiko Miyanohara, Komae, JP;
Inventors:
Jonathan R. Knight, Tokyo, JP;
Akihiko Miyanohara, Komae, JP;
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H02P 7/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and systems for driving a motor are disclosed. A center tap voltage and a desired center tap voltage are used to generate a voltage feedback. A power amplifier receives a reference current and the voltage feedback. The power amplifier provides a phase current to a phase of a motor. The phase current is substantially centered about the desired center tap voltage as a consequence of the voltage feedback. Thus, high-side to low-side or state to state current variations are reduced thereby reducing the occurrence of problems such as torque ripple and back EMF.