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:
Jul. 18, 2002
Wennong Zhang, Fukuoka, JP;
Yasuhiko Kaku, Fukuoka, JP;
Wennong Zhang, Fukuoka, JP;
Yasuhiko Kaku, Fukuoka, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
In a speed control system, there are provided a speed observer compensator () for inputting a difference between a speed Vof a mechanical system () and an estimated value Vof a speed of the mechanical system () which is obtained by a speed observer () and outputting a speed difference V−Vbased on the input, and a mechanical system model () for inputting a sum of an output of the speed observer compensator () and an output Tof a PI controller (), and the speed observer () is constituted in such a manner that the signal Vproduced after a passage of an output of the mechanical system model () through a filter delay element model () and a dead time delay element model () is equal to the speed Vof the mechanical system (), and the output of the mechanical system model () is set to be a speed feedback signal Vof the speed control system. Consequently, it is possible to provide a speed control device capable of removing the high frequency component of the speed feedback signal, compensating for the phase delay of the delay element so as not to generate an oscillation having a high frequency, and causing the speed of the mechanical system to follow a target speed with high precision.