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:
Apr. 11, 2006
Filed:
Jul. 25, 2005
Yutaka Inaba, Numazu, JP;
Masakatsu Takahashi, Numazu, JP;
Tomohiro Nakagawa, Numazu, JP;
Kokusan Denki Co., Ltd., Shizuoka-ken, JP;
Abstract
A rotor position determination device for determining a position of a rotor of a rotating electric machine relative to m-phase (m is an integer equal to or more than 2) armature coils, the rotating electric machine including a stator having the m-phase armature coils, and the rotor having a magnetic field, includes: transient current energizing means for performing, for each of the m-phase armature coils, a transient current energizing process for temporarily applying a DC voltage to the armature coil of each phase of the rotating electric machine to pass a transient current through the armature coil of each phase; and rotor position determination means for detecting the transient current passed through each of the m-phase armature coils and determining the position of the rotor relative to the m-phase armature coils from the detected transient currents.