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:
Oct. 27, 2015
Filed:
Oct. 30, 2013
Denso Corporation, Kariya, Aichi-pref., JP;
Ryuji Omata, Anjo, JP;
Takeshi Itoh, Nagoya, JP;
Hirofumi Kako, Chita-gun, JP;
Takashi Suzuki, Anjo, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A current estimation section of a motor control apparatus carries out the following processing. When an AC motor is controlled under a current feedback control scheme (sine wave control mode or overmodulation control mode), a β-axis current iβ is calculated based on a current detection value iw_sns in a sensor phase and a current command value iv* in one other phase. When the AC motor is controlled under a torque feedback control scheme (rectangular wave control mode), the β-axis current iβ is calculated based on a differential value Δiα of an α-axis current. Then a sensor phase reference current phase θx is calculated to estimate a U-phase current. Thus it is possible to use the current feedback control scheme and the torque feedback control scheme together.