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:
May. 21, 2024
Filed:
Nov. 19, 2020
Kabushiki Kaisha Toyota Jidoshokki, Kariya, JP;
Akira Ide, Aichi-ken, JP;
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya, JP;
Abstract
A control device for an electric motor includes an inverter circuit; and a control circuit that finds a voltage command value such that the d-axis current and the q-axis current approach a d-axis current command value and a q-axis current command value, and turns the plurality of switching elements on and off by using a drive signal in accordance with a result of comparison between the voltage command value and a carrier wave. The control circuit corrects the voltage command value by using a polarity of the alternating current during dead time, and causes the d-axis current command value in a certain length of time before and after the alternating current reaches zero to be greater than the d-axis current command value in a length of time other than the certain length of time.