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:
Nov. 18, 2003
Filed:
Sep. 06, 2001
Dal Ho Jung, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A speed control apparatus of a synchronous reluctance motor includes: a rectifier for receiving an AC power and rectifying it to a DC power; an inverter for receiving a DC power to an AC power and supplying it to a synchronous reluctance motor; a detecting unit for detecting a current and a voltage supplied to the synchronous reluctance motor, operating the generated induction voltage and the estimated induction voltage generated from the current, and generating an estimated angular velocity of the synchronous reluctance motor; and a controller for receiving the estimated angular velocity and the velocity command value inputted by a user and controlling the speed of the synchronous reluctance motor through the inverter. Since the speed of the synchronous reluctance motor is controlled by detecting the current and the voltage supplied to the synchronous reluctance motor, rather than using an encoder or a hall sensor, a production cost of the synchronous reluctance motor can be reduced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile