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. 10, 2012
Filed:
Nov. 24, 2010
Sadahiro Akama, Nukata-gun, JP;
Shuji Agatsuma, Toyohashi, JP;
Nobumasa Ueda, Nagoya, JP;
Masahiro Kuroda, Yokkaichi, JP;
Kiyoshi Nagata, Nagoya, JP;
Masaya Ootake, Kariya, JP;
Sadahiro Akama, Nukata-gun, JP;
Shuji Agatsuma, Toyohashi, JP;
Nobumasa Ueda, Nagoya, JP;
Masahiro Kuroda, Yokkaichi, JP;
Kiyoshi Nagata, Nagoya, JP;
Masaya Ootake, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A motor driving apparatus has a loss-of-synchronism monitoring circuit that monitors the rotation of a rotary machine such as a brushless DC motor to detect a sign of transition to a state of loss of synchronism. When the sign is detected, an energization control circuit temporarily stops driving of the rotary machine to bring it into a free running state, and thereafter carries out control so as to resume driving of the rotary machine. Further, the motor driving apparatus has an inverter and a drive control circuit that controls switching operation of the inverter based on rotation of the rotary machine.