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:
Mar. 27, 2007
Filed:
Apr. 25, 2005
Dong Won Kim, Kwangmyung-si, KR;
Byoung Wook Min, Seoul, KR;
Byung Keol Choi, Inchun-si, KR;
Tae Hee Lee, Buchun-si, KR;
Dong Won Kim, Kwangmyung-si, KR;
Byoung Wook Min, Seoul, KR;
Byung Keol Choi, Inchun-si, KR;
Tae Hee Lee, Buchun-si, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A variable speed motor includes first and second main windings wound on a stator, and a relay for performing a switching operation between serial/parallel connections of the first and second main windings to control motor speed. The variable speed motor further includes a tap winding connected in series to the main windings, or an additional capacitor, such that it can greatly extend the range of a variable speed without using a drive unit capable of changing the motor speed at an external location, resulting in reduced production costs of the motor, reduced electromagnetic vibration noise, and reduced power consumption.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile