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:
Sep. 22, 1998
Filed:
Feb. 13, 1997
Yasuhiro Yamamoto, Ichinomiya, JP;
Kabushiki Kaisha Meidensha, Tokyo, JP;
Abstract
In apparatus and method for controlling a torque of an induction motor through a vector control method type inverter having a slip frequency calculator arranged for calculating a slip frequency used to perform a vector control for the induction motor and a secondary resistance compensation circuit arranged for correcting the slip frequency by a temperature variation in a secondary resistance of the induction motor, basically a skin effect correction circuit is added for deriving an error component developed in an output of the secondary resistance compensation circuit when a leakage inductance L.sigma.is non-linearly varied due to a skin effect phenomenon.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile