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, 2015
Filed:
Oct. 07, 2011
Hidetoshi Ikeda, Tokyo, JP;
Hiroyuki Sekiguchi, Tokyo, JP;
Yuji Igarashi, Tokyo, JP;
Shuya Sano, Tokyo, JP;
Takashi Isoda, Tokyo, JP;
Hidetoshi Ikeda, Tokyo, JP;
Hiroyuki Sekiguchi, Tokyo, JP;
Yuji Igarashi, Tokyo, JP;
Shuya Sano, Tokyo, JP;
Takashi Isoda, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A motor control device includes a feedback filter that has filter characteristics that a frequency response gain is substantially one at frequencies equal to or lower than a filter cutoff frequency, a frequency response gain decreases with increase in frequency in a range from the filter cutoff frequency ωfL to a filter upper limit frequency ωfH higher than the filter cutoff frequency ωfL, and a frequency response gain is substantially constant at frequencies equal to or higher than the filter upper limit frequency ωfH, and performs computing to apply the filter characteristics to a feedback transfer function, wherein a control-constant set unit sets a speed gain Kv and at least one of the filter cutoff frequency ωfL and the filter upper limit frequency ωfH to reduce a ratio of the filter upper limit frequency ωfH to the filter cutoff frequency ωfL with increase in the speed gain Kv.