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. 16, 2007
Filed:
Mar. 12, 2003
Mimpei Morishita, Tokyo-To, JP;
Mimpei Morishita, Tokyo-To, JP;
Toshiba Elevator Kabushiki Kaisha, Tokyo-To, JP;
Abstract
A vibration controller controls vibrations generated in a driven object included in a system subject to vibrations due to the dynamic unbalance or eccentricity of a rotating member driven for rotation by an electric motor. An angular position transforming unit () and an angular velocity transforming unit () transform the output signal of a rotating motion measuring means (C) into an angular position and an angular velocity, respectively. A sine calculating unit () calculates the sine of an angle obtained by adding up the angular position and a predetermined phase angle provided by a phase adjusting unit () by an adder (). A multiplier () calculates the product of the output of a gain adjusting unit () that multiplies the output of the sine calculating unit () by a predetermined gain and the output of a multiplier () that calculates the square of the angular velocity. Again adjusting unit (') multiplies the output of a sine calculating unit (′) by a predetermined gain. An adder () adds up the respective outputs of the multiplier () the gain adjusting unit (′) and a specified torque calculating unit.