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. 23, 2024
Filed:
May. 13, 2020
Mitsubishi Electric Corporation, Tokyo, JP;
Hiroya Natsuhara, Tokyo, JP;
Isao Kezobo, Tokyo, JP;
Tatsuya Mori, Tokyo, JP;
Kenta Tanaka, Tokyo, JP;
Yusuke Takarada, Tokyo, JP;
Yuya Takeuchi, Hyogo, JP;
Atsushi Ito, Hyogo, JP;
Mamoru Shiraki, Hyogo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
To provide a controller for AC rotary machine which can detect current of the normal phase certainly when the short circuit failure of one phase occurs, in an apparatus that a current sensor is connected in series to the positive electrode side switching device or the negative electrode side switching device of an inverter. A controller for AC rotary machine, when determining that the short circuit failure of any one phase occurred, calculates voltage command values of normal n−1 phases, and changes the voltage command values of the normal n−1 phases so that on period of the detection object device of each phase of the normal n−1 phases become longer than or equal to a length necessary for current detection at least at a current detection timing.