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:
Sep. 11, 2012
Filed:
Jan. 11, 2010
Toshifumi Yamakawa, Okazaki, JP;
Kenji Yamada, Nagoya, JP;
Yutaka Kuromatsu, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
In a control of an AC motor that uses a PWM control and a rectangular-wave control, when switching is conducted from the rectangular-wave control to the PWM control, a current command generated in a current command generation unit is corrected so as to smooth the variations in a time axis direction on the basis of a target torque command value by taking the final current state in the rectangular-wave control immediately prior to switching as an initial value, thereby generating a current command after the correction. An inverter is current feedback-controlled based on the current command after the correction. As a result, the continuity from the current state immediately prior to switching of the rectangular-wave control can be ensured for the current command in the PWM control.