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:
Jul. 27, 2021
Filed:
Dec. 04, 2019
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Kenji Todu, Kariya, JP;
Misato Maeda, Kariya, JP;
Naoki Onosaka, Kariya, JP;
Keirei Lin, Kariya, JP;
Genki Yamashita, Obu, JP;
AISIN SEIKI KABUSHIKI KAISHA, Kariya, JP;
Abstract
A motor control device controls driving of a motor in response to d-axis and q-axis current commands set on the basis of a torque command. The motor control device includes: an electrical angle estimation unit configured to estimate an electrical angle of the motor according to at least one of methods of estimating the electrical angle on the basis that a leakage current in a q axis becomes zero by applying a voltage to a d axis, on the basis that at least one of a phase current difference and a line current difference caused by an induced voltage generated due to rotation of the motor becomes zero, and on the basis of a voltage equation, depending on an angular velocity of the motor, a modulation rate of a pwm signal, and whether a magnetic flux change is included in a nonlinear region.