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. 18, 2011
Filed:
Sep. 08, 2006
Shinya Morimoto, Kitakyushu, JP;
Hyun-soo Song, Kitakyushu, JP;
Mamoru Takaki, Kitakyushu, JP;
Kozo Ide, Kitakyushu, JP;
Shinya Morimoto, Kitakyushu, JP;
Hyun-Soo Song, Kitakyushu, JP;
Mamoru Takaki, Kitakyushu, JP;
Kozo Ide, Kitakyushu, JP;
Kabushiki Kaisha Yaskawa Denki, Kitakyushu-shi, JP;
Abstract
The present invention provides an initial pole position estimating apparatus and method for an AC synchronous motor without using magnetic pole detector. The initial pole position estimating apparatus includes a thrust force or torque pattern generating portion for generating a thrust force or torque pattern, a pole position command generating portion for generating a pole position command, and a position detecting portion for detecting a position of the AC synchronous motor. The initial pole position estimating apparatus can estimate an initial pole position in a short time with high precision without depending on a fluctuation in a load. The initial pole position estimating apparatus further includes a pole position correcting portion () for correcting the pole position command and a thrust force or torque pattern correcting portion () for correcting the thrust force or torque pattern, and an initial pole position is estimated through a repetitive correction.