|
(11) | EP 1 760 182 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||
| (54) | Unbalance detection method and washing machine using the same |
| (57) A washing machine and unbalance detection method using the same, which is capable
of efficiently detecting unbalance of a rotation tub. A washing machine includes:
a washing motor rotating a rotation tub accommodating laundry; a motor velocity detection
unit detecting a velocity of the washing motor and outputting a motor velocity signal;
and a controller determining whether unbalance of the rotation tub occurs according
to an unbalance level determined on the basis of a velocity ripple of the motor velocity
signal, and controlling the washing motor according to the determination result. A
method of detecting unbalance of a rotation tub accommodating the laundry in a washing
machine includes: driving a washing motor in order to rotate the rotation tub; detecting
a velocity of the washing motor, and outputting a motor velocity signal; extracting
a velocity ripple of the motor velocity signal, the velocity ripple being generated
while detecting the velocity of the washing motor; operating the extracted velocity
ripple, and detecting an unbalance level; and comparing the detected unbalance level
with a reference value, and determining whether the unbalance of the rotation tub
occurs.
|