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:
Jun. 06, 1995
Filed:
Oct. 15, 1993
Jin-Won Lee, Seoul, KR;
Dong-Il Kim, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon City, KR;
Abstract
A method for controlling speed of a single phase induction motor using frequency variation, including the steps of generating an operation start signal and a speed command signal according to a user's selection, outputting a digital data for formation of a sinusoidal wave signal of a desired frequency, to converting means at an interval of a predetermined time period set by a timer to thereby generate the sinusoidal wave signal of the frequency desired by the user, generating the sinusoidal wave based on the digital data, comparing the sinusoidal wave with a triangular signal for controlling a speed of a motor, and converting a DC voltage from a power source into an AC voltage of a frequency band desired by the user to thereby operate the motor. An apparatus for controlling the speed of a single phase induction motor is also provided.