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:
Mar. 31, 2009
Filed:
Jan. 07, 2004
Kei Terada, Tokyo, JP;
Tetsuaki Nagano, Tokyo, JP;
Yasunobu Harada, Tokyo, JP;
Kazutaka Takahashi, Tokyo, JP;
Kei Terada, Tokyo, JP;
Tetsuaki Nagano, Tokyo, JP;
Yasunobu Harada, Tokyo, JP;
Kazutaka Takahashi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In a motor control device according to the invention, upon velocity control of a motor, a superimposed signal generating unitoutputs a superimposed signal idh of a repetitive waveform, such as a triangular wave or a sine wave. A d-axis current command generating unitadds the superimposed signal idh generated by the superimposed signal generating unitto a d-axis current command idc*0 and outputs a d-axis current command idc*. An axial misalignment detecting unit(, and) receives the d-axis current command idc* and a q-axis current command iqc* and outputs an axial misalignment angle estimation value Δθ^. An axial misalignment correction unitreceives the axial misalignment angle estimation value Δθ^ and an actual detected position θm and outputs a position after correction θm'. Therefore, detection and correction can be performed in real time through calculation at a given timing during a normal operation.