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. 09, 2008
Filed:
Dec. 28, 2004
Yoshihiko Kinpara, Tokyo, JP;
Takahiko Kobayashi, Tokyo, JP;
Masahiro Fukuta, Tokyo, JP;
Takumi Oonuma, Tokyo, JP;
Yoshihiko Kinpara, Tokyo, JP;
Takahiko Kobayashi, Tokyo, JP;
Masahiro Fukuta, Tokyo, JP;
Takumi Oonuma, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric Building Techno-Service Co., Ltd., Tokyo, JP;
Abstract
In an apparatus measuring constants of an induction motor, an inverter converts an inputted voltage command signal into a single-phase AC power and feeds the single-phase AC power to the induction motor, and a currert detector detects a current of the single-phase AC power fed to the induction motor. An apparatus controller generates a voltage command signal corresponding to an AC voltage as applied to the induction motor and outputs the voltage command signal to the inverter and gerates the voltage command signal and controls the inverter to feed the single-phase AC power having a frequency selected in a range equal to or higher than 0.006 Hz and equal to or lower than 1.5 Hz to the induction motor. A constant calculation controller calculates constants of the induction motor based on the voltage and current of the single-phase AC power fed to the induction motor.