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. 05, 2018
Filed:
Sep. 06, 2017
Applicant:
Jtekt Corporation, Osaka-shi, Osaka, JP;
Inventor:
Hiroshi Sumasu, Kashihara, JP;
Assignee:
JTEKT CORPORATION, Osaka-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 27/08 (2006.01); H02M 1/44 (2007.01); H02P 29/50 (2016.01); H02P 21/22 (2016.01);
U.S. Cl.
CPC ...
H02P 27/08 (2013.01); H02M 1/44 (2013.01); H02P 21/22 (2016.02); H02P 29/50 (2016.02);
Abstract
A maximum spectrum peak reduction unit sets a PWM count generated by a PWM duty ratio calculation unit for a specific current control period as PWM counts for respective PWM periods within the current control period, and changes the set PWM counts for the respective PWM periods within the current control period so that a frequency component having a frequency obtained by dividing a carrier frequency in half or less is included in a PWM signal waveform within the current control period without changing a total value of the PWM counts for the respective PWM periods.