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. 10, 2007
Filed:
Dec. 05, 2005
Applicants:
Akira Ide, Nagoya, JP;
Kazuki Najima, Chiryu, JP;
Motonobu Funato, Obu, JP;
Shinya Sato, Obu, JP;
Takashi Kawashima, Toyoake, JP;
Inventors:
Akira Ide, Nagoya, JP;
Kazuki Najima, Chiryu, JP;
Motonobu Funato, Obu, JP;
Shinya Sato, Obu, JP;
Takashi Kawashima, Toyoake, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 1/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
The control device records, in advance, a current data table which specifies relationships between currents in respective phases in a three-phase motor and rotation angles of a rotor of the three-phase motor, obtains, from the current data table, a rotation angle of the rotor of the three-phase motor corresponding to a current in each phase in the three-phase motor detected by a current sensor before driving of the three-phase motor, and obtains an initial position of the rotor.