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:
Jan. 02, 2007
Filed:
Dec. 20, 2005
Akihiro Nakagawa, Tokyo, JP;
Jun Suzumura, Tokyo, JP;
Akihiro Nakagawa, Tokyo, JP;
Jun Suzumura, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A drive method for a brushless motor and a drive control apparatus therefor, in which control parameters are calculated by motor current control means (in FIG.) in accordance with the deviation between a target motor current value and an actual motor current value, a manipulated variable is computed by phase control means () on the basis of the calculated control parameters, an advance angle magnitude is computed from the relationship between a manipulated variable and an advance angle magnitude as designed and created beforehand, on the basis of the computed manipulated variable, and the value of the conduction phase angle of a drive circuit () as set on the basis of a motor current signal is corrected with the information of the computed advance angle magnitude.