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. 08, 2015
Filed:
Apr. 11, 2011
Hisanori Yamasaki, Tokyo, JP;
Keita Hatanaka, Tokyo, JP;
Masaki Kono, Tokyo, JP;
Hidetoshi Kitanaka, Tokyo, JP;
Hisanori Yamasaki, Tokyo, JP;
Keita Hatanaka, Tokyo, JP;
Masaki Kono, Tokyo, JP;
Hidetoshi Kitanaka, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An object is to provide a magnetic-pole position detection apparatus for synchronous machines that allows a desired accuracy of magnetic-pole position detection regardless of variation in DC voltage of a DC voltage source. Calculation means () changes a pulse width (tp) and a pulse-quiescent width (tn) in accordance with a DC voltage detection value (Vdc), using a pulse width determination section (), such that a desired accuracy of magnetic-pole position detection can be obtained regardless of variation in DC voltage of a DC voltage source (). The calculation means () also performs control such that a sampling timing is fixed at the end point of the pulse width (tp) of voltage vectors regardless of the DC voltage detection value (Vdc).