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:
Dec. 04, 2007
Filed:
Mar. 10, 2006
Kazunobu Nagai, Aichi-gun, JP;
Tsuyoshi Shinohara, Yokohama, JP;
Hiromi Oka, Yokohama, JP;
Toshikazu Sekihara, Kawasaki, JP;
Kazunobu Nagai, Aichi-gun, JP;
Tsuyoshi Shinohara, Yokohama, JP;
Hiromi Oka, Yokohama, JP;
Toshikazu Sekihara, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A motor control device for controlling a permanent magnet motor includes a current detector detecting current flowing through three-phase windings, an induced voltage computing unit obtaining voltage induced at each phase from the detected three-phase winding current based on a phase voltage equation, a position detector detecting a rotational position of the rotor from the induced voltage of each phase computed by the induced current computing unit, the rotational position of the rotor having a 6n resolution where n is an integer equal to or larger than 1, an energization phase control unit determining a phase to be energized based on the rotational position of the rotor and a phase command, an energization signal forming unit forming a 6n-resolution three-phase energization signal, and an energizing unit carrying out PWM modulation for the three-phase energization signal, supplying voltage according to the modulated three-phase energization signal to each of the three-phase windings.