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:
Sep. 18, 2007
Filed:
Nov. 28, 2002
Taro Kishibe, Nishinomiya, JP;
Subrata Saha, Anjo, JP;
Hiroshi Murakami, Suita, JP;
Kazushige Narazaki, Katano, JP;
Taro Kishibe, Nishinomiya, JP;
Subrata Saha, Anjo, JP;
Hiroshi Murakami, Suita, JP;
Kazushige Narazaki, Katano, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A discrete rotor position estimation method for a synchronized reluctance motor is provided. A d.c.-link voltage Vand a phase current Iare sensed. A flux-linkage λof an active phase is calculated from the sensed d.c.-link voltage Vand the sensed phase current I. The calculated flux-linkage λis compared with a reference flux-linkage λ. The reference flux-linkage λcorresponds to a reference angle θwhich lies between angles corresponding to aligned rotor position and non-aligned rotor position in the synchronized reluctance motor. An estimated rotor position θis obtained only once when the calculated flux-linkage λis greater than the reference flux-linkage λ.