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, 2005
Filed:
Feb. 28, 2002
Applicants:
Ryoso Masaki, Hitachi, JP;
Satoru Kaneko, Urizura, JP;
Yoshimi Sakurai, Hitachiota, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 618 ;
U.S. Cl.
CPC ...
Abstract
In order to propose an inexpensive and highly precise motor controller, it is structured so as to detect the position of the rotor on the basis of the difference between the real current differential vector and the reference current differential vector, thereby control the motor without using a rotation position sensor.
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Masaki, Ryoso. (2005). Motor controller (U.S. Patent No. 6844697). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6844697
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