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. 01, 2002
Filed:
Jun. 19, 2000
Hideto Negoro, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A vector controller for an induction motor that conducts vector control by computing a d-axis current command value, a q-axis current command value, and a slip angular frequency command value based on a torque command value, a secondary magnetic flux command value, and aN induction motor constant has circuitry for automatically adjusting a correction value of secondary resistance. A secondary resistance correction value computing unit calculates a secondary resistance correction value by using d-axis and q-axis feed-forward voltage command values, d-axis and q-axis voltage command values, a torque current command value, and a magnetic flux current command value. A vector control command computing unit uses the computed secondary resistance correction value to carry out vector control of an induction motor.