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, 2007
Filed:
Dec. 16, 2005
Masatoshi Hoshino, Tsuchiura, JP;
Katsuji Marumoto, Hitachi, JP;
Minoru Oosuga, Hitachinaka, JP;
Yasuhiro Kamimura, Hitachinaka, JP;
Yasushi Sasaki, Urizura-machi, JP;
Masatoshi Hoshino, Tsuchiura, JP;
Katsuji Marumoto, Hitachi, JP;
Minoru Oosuga, Hitachinaka, JP;
Yasuhiro Kamimura, Hitachinaka, JP;
Yasushi Sasaki, Urizura-machi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method is provided for easily avoiding undesirable effects on various physical values due to the change in temperature of a motor for driving a throttle valve without causing secondary problems. A technique is also provided for measuring the temperature of the motor electrically. The method uses a compensation device for correcting the power supply to the motor by detecting the impedance of the motor windings and/or the change in the motor temperature. The temperature of the motor is estimated from the current and voltage to the motor.