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:
Jun. 16, 2009
Filed:
Mar. 21, 2007
Hirofumi Atarashi, Wako, JP;
Hiroyuki Isegawa, Wako, JP;
Hirofumi Atarashi, Wako, JP;
Hiroyuki Isegawa, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A controller for a motor is capable of reducing the amount of energization required to operate a motor under a predetermined condition, the motor having two rotors disposed around a rotating shaft. The controller includes an induced voltage constant command value determiner which determines an induced voltage constant command value (Ke_c) of a motor such that a difference (ΔVp) between a target voltage circle radius (Vp_target) and a magnitude (Vp) of the vector sum of a d-axis voltage command value and a q-axis voltage command value of the motor decreases, a rotor phase difference acquirer and a rotor phase difference command value determiner which change a rotor phase difference on the basis of the Ke_c, and a field weakening current correction value calculator which determines a field weakening correction current ΔId_vol on the basis of ΔVp and adds the determined ΔId_vol to the d-axis current command value in the case where Vp cannot be reduced to Vp_target or less by reducing Ke_c to a lower limit of a rotor phase difference changing range.