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, 2020
Filed:
May. 14, 2018
Applicant:
Renesas Electronics Corporation, Tokyo, JP;
Inventors:
Reiji Yamasaki, Tokyo, JP;
Yoshitaro Kondo, Tokyo, JP;
Assignee:
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 27/08 (2006.01); H02M 7/5387 (2007.01); H02M 1/08 (2006.01); H02P 6/16 (2016.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02P 27/085 (2013.01); H02M 1/08 (2013.01); H02M 7/53871 (2013.01); H02P 6/16 (2013.01); H02M 2001/0009 (2013.01);
Abstract
A calculation apparatusincludes an encoderconfigured to detect rising edges of PWM signals having at least three or more phases in each of the phases, and a registerconfigured to store, at a timing after the PWM signals having the respective phases rise and after AD conversion of a current value of a drive signal of a motor obtained by the PWM signals, a difference value between the AD-converted current value and a previous AD-converted current value for each phase.