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. 09, 1999
Filed:
Mar. 31, 1998
Sam Kyung Sung, Nam-Ku, Pusan, KR;
Other;
Abstract
An electric motor in which polarities of a stator and the number of polarities thereof are converted by converting the polarity of current depending on a rotation position of a rotor made of a permanent magnet so as to enhance attraction and repulsion occurring between the rotor and the stator, so that a rotative force of the rotor can be achieved with minimum power. The electric motor includes a stator having a plurality of iron cores fixably mounted within a main body at a predetermined distance and a plurality of coils wound in the plurality of iron cores, a rotor disposed in a center portion of the main body, having a permanent magnet having a predetermined number of polarities between an upper cover formed in an integral form with a connecting portion and a lower cover, a current converter screwed to the connecting portion of the rotor externally protruded over a cover of the main body, for supplying current to coils wound in the iron cores and converting polarity of current, a brush fixing portion for supplying main current to the current converter and fixing a plurality of brushes which supply current to the coils through the current converter, and a current supply portion mounted in the cover of the main body and connected to the plurality of brushes, for supplying current to the coils wound in the iron cores.