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. 03, 2015
Filed:
Mar. 13, 2013
Applicant:
Texas Instruments Incorporated, Dallas, TX (US);
Inventor:
Vikas Suma Vinay, Dallas, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/18 (2006.01); H02P 23/00 (2006.01);
U.S. Cl.
CPC ...
H02P 23/0036 (2013.01);
Abstract
Back-emf for a motor is measured by measuring a voltage across the input terminals for a two terminal input actuator or motor when a high frequency driver having a recirculation phase for the motor applies an instantaneous high frequency zero voltage during normal operation of the driver. By a further approach, current across the two terminal input is measured such that the measurement can be taken when the current crosses a given threshold near zero.