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:
Feb. 11, 2025
Filed:
Jan. 29, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Naoki Shinohara, Hitachinaka, JP;
Keisuke Suzuki, Hitachinaka, JP;
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Abstract
Provided is a motor control device that can reduce an error component resulting from braking or the like to bring an estimated motor speed closer to an actual motor speed, thereby improving the accuracy of control of a motor. The motor control device includes a controllerthat outputs a first torque instruction signal that is an instruction to specify a torque of an electric motor, and a damping control unit. The damping control unitincludes a first high-pass filterthat receives input of a motor speed signal indicating a speed of the electric motor, the first high-pass filteroutputting a first signal, a second high-pass filterthat receives input of an estimated motor speed signal obtained from the first torque instruction signal, the second high-pass filteroutputting a second signal, and a low-pass filterthat receives input of a motor speed deviation signal indicating a deviation between the first signal and the second signal, the low-pass filterobtaining a low-frequency component from the motor speed deviation signal and outputting the low-frequency component as a third signal.