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:
Jun. 08, 2010
Filed:
Feb. 08, 2006
Hidetoshi Ikeda, Tokyo, JP;
Satoshi Mizogami, Tokyo, JP;
Hiroki Ishii, Tokyo, JP;
Tomoaki Sekiguchi, Tokyo, JP;
Hidetoshi Ikeda, Tokyo, JP;
Satoshi Mizogami, Tokyo, JP;
Hiroki Ishii, Tokyo, JP;
Tomoaki Sekiguchi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Toshiba Mitsubishi-Electric Industrial Systems Corporation, Tokyo, JP;
Abstract
A motor controller calculates a motor torque command based on motor speed and causes a motor to generate a torque corresponding to the motor torque command, to drive a machine load coupled to the motor. The motor controller includes a speed compensator that makes, when a speed compensation torque is calculated based on the motor speed, frequency characteristics of the speed compensation torque for the motor speed exhibit a low frequency cutoff characteristic so that steady-state gain in frequency response is less than a maximum gain value. A torque adder generates a motor torque command by adding to the existing motor torque command an externally input feedforward torque signal and the speed compensation torque.