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. 31, 2006
Filed:
Mar. 28, 2002
Kazuhiro Tsuruta, Fukuoka, JP;
Kazuhiro Tsuruta, Fukuoka, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
A detector () detects the position of a motor, and a differentiator () calculates the speed of the motor from the position of the motor. An command generation section () fixes a position command to a current position. A position control section () generates a speed command such that the position command matches the position of the motor. A speed control section () generates such a torque command that the speed command coincides with the speed of the motor. An adder () adds a high-speed sweep waveform generated by a random signal generation section () as torque random to a torque command output from a torque filter section (), thereby outputting a new torque command. A current control section () converts the torque command into a current command, thereby driving a motor (). A frequency response measurement section () receives a torque command output from the adder () and a motor speed calculated by a differentiator () and measures a frequency response.