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. 12, 2014
Filed:
Aug. 10, 2012
Yasufumi Yoshiura, Kitakyushu, JP;
Yasuhiko Kaku, Kitakyushu, JP;
Yasufumi Yoshiura, Kitakyushu, JP;
Yasuhiko Kaku, Kitakyushu, JP;
Kabushiki Kaisha Yaskawa Denki, Kitakyushu-Shi, JP;
Abstract
A motor control apparatus includes a position detector to detect a position of a motor. A speed operator calculates a first speed of the motor. A position controller outputs a first speed command. A speed controller acquires a difference between the first speed command and a second speed of the motor to output a first torque/thrust command. A phase compensator includes a lowpass filter to advance a phase of the second speed, and acquires the first speed and the first torque/thrust command to output the second speed. An inertia variation inhibitor includes a disturbance observer estimating a disturbance torque/thrust. The inertia variation inhibitor acquires the first speed and a second torque/thrust command, and adds the disturbance torque/thrust to the first torque/thrust command to output the second torque/thrust command. A torque/thrust controller acquires the second torque/thrust command to control a motor torque/thrust.