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:
May. 05, 2009
Filed:
Dec. 21, 2005
Jun Fujita, Mishima, JP;
Takamichi Ito, Numazu, JP;
Jun Fujita, Mishima, JP;
Takamichi Ito, Numazu, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
A signal processing device processes a position information signal (A sinθ, A cosθ) output from a sensor in accordance with a driving position of a motor and detects a driving speed of the motor. The signal processing device includes a position information signal processor () that processes the position information signal and calculates driving speed information of the motor, and an internal position information generator () that reflects a latest driving speed information (ω) calculated by the position information signal processor () and generates a latest presumed position of the motor as internal position information. The position information signal processor () calculates driving speed information (ω) of the motor based on a difference between the position information signal (A sinθ, A cosθ) from the sensor and the internal position information (A sinθ, A cosθ) generated by the internal position information generator ().