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:
Aug. 26, 2014
Filed:
Mar. 09, 2010
Three-phase motor controller, three-phase motor system, three-phase motor control method and program
Yoshiho Yanagita, Tokyo, JP;
Kazuhiko Aoki, Tokyo, JP;
Yoshiho Yanagita, Tokyo, JP;
Kazuhiko Aoki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A three-phase motor control apparatuscontrolling a driver which drives a three-phase motor includes: a desired rotation angle generation sectionwhich generates a desired rotation angle; a rotation angle detectorwhich detects a detected rotation angle which is the rotation angle of said three phase motor; a feedback controllerwhich generates a q-axis command reference value which controls the q-axis voltage or the q-axis current of the three-phase motorin response to the desired rotation angle and the detected rotation angle; a drive torque correction section and an adderwhich generate a q-axis command value by correcting the q-axis command reference value; and a two-phase to three-phase transformation sectionwhich generates a control signal which controls the driver circuitwhich drives the three-phase motor in response to the q-axis command. The drive torque correction sectionincludes an angle look-up tablewhich contains elements respectively associated with angle ranges defined for the rotation angle of the three-phase motor, and selects any of the elements in response to the detected rotation angle. The q-axis command is generated by correcting the q-axis command reference value based on the value of the selected element.