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. 15, 2015
Filed:
Feb. 16, 2009
Tomofumi Okubo, Narashino, JP;
Norinaga Suzuki, Katori, JP;
Hajime Uematsu, Narashino, JP;
Hideharu Tanaka, Shizuoka, JP;
Masakazu Hase, Shizuoka, JP;
Yoshiyuki Taguchi, Funabashi, JP;
Tomofumi Okubo, Narashino, JP;
Norinaga Suzuki, Katori, JP;
Hajime Uematsu, Narashino, JP;
Hideharu Tanaka, Shizuoka, JP;
Masakazu Hase, Shizuoka, JP;
Yoshiyuki Taguchi, Funabashi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Disclosed is a motor control apparatus for controlling a synchronous motor, which includes a receiver section for receiving the value detected by a temperature sensor installed inside the synchronous motor. The synchronous motor is started up with the current fed into it, whose magnitude is changed in accordance with the temperature received by the receiver section at the time of starting up the synchronous motor. In this way, the stable startup of the synchronous motor can be guaranteed and the useful life of the semiconductor elements can also be prolonged.