Patent Number: 7,102,309

Title: Apparatus for compensating for speed error of motor

Abstract: The present invention discloses an apparatus for compensating for a speed error of a motor which can reduce a speed ripple of the motor resulting from load characteristics, and which also can reduce vibrations and noises. The apparatus for compensating for the speed error of the motor divides a rotational section corresponding to one complete revolution of a rotor of the motor into a plurality of preset rotational sections, determines a speed compensation value in each divided rotational section on the basis of a difference value between a reference speed and a previous estimated speed, and compensates for the speed error of the motor on the basis of the speed compensation value.

Inventors: Oh; Jae-Yoon (Gyeonggi-Do, KR), Cheong; Dal-Ho (Seoul, KR)

Assignee: LG Electronics Inc.

International Classification: H02P 1/00 (20060101); H02P 1/22 (20060101)

Expiration Date: 9/05/02018