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:
Jul. 18, 2000
Filed:
Aug. 27, 1998
Yoshiro Seki, Tokyo, JP;
Hiroyuki Ohashi, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
To provide an elevator speed controller capable of suppressing vibration of an elevator of which natural frequency is largely variable and enabling a highly accurate speed control irrespective of change in elevator characteristic and easy adjustment. An elevator speed controller, comprising a car speed command value setting means to set a car speed command value upon receipt of an elevator starting command to move a car up/down via a rope wound around a sheave by driving the sheave by a motor and a car speed command value correcting means to correct a car speed command value set by the car speed command value setting means by a vibration detected value detected by a car vibration detecting means so as to suppress the car vibration, in structure to control a motor speed according to a corrected car speed command value.