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. 17, 2018
Filed:
Jun. 29, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
Shingo Harada, Tokyo, JP;
Keiichi Enoki, Tokyo, JP;
Masutaka Watanabe, Tokyo, JP;
Yoshimasa Nishijima, Tokyo, JP;
Yasukazu Murata, Hyogo, JP;
Michitaka Fujiwara, Hyogo, JP;
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Abstract
An inverter control device and inverter control method are such that, when there is a possibility of induction voltage caused by a multi-phase motor exceeding a breakdown voltage of a switching element of an inverter, two of three phases are first interrupted at an appropriate timing in order to restrict induction voltage when shifting from a three-phase short circuit to an all-phase interruption, after which a shift is made to an all-phase interruption at a timing at which currents of the three phases reach the vicinity of zero, whereby a leap in a direct current bus voltage is restricted.