Washing machine and method for controlling the same

摘要

A method for controlling a washing machine includes comparing a command value of a motor with a predetermined limit value, during spin-drying, to determine whether the motor is overloaded, and controlling driving of the motor in response to the determination. It may be possible to determine a water filling state, an excessive bubble state, or a drainage error state, which may be caused during a spin-drying operation, and to take a proper measure. That is, in the drainage error state, a user is informed of the drainage error. In the water filling state, the spin-drying is normally completed by re-performing the spin-drying operation. In the excessive bubble state, a rinsing or spin-drying operation is added to remove the bubbles. When the bubbles are not removed by the added rinsing or spin-drying operation, the excessive bubble message is displayed to inform a consumer of the excessive bubble state.

主权项

1. A method for controlling a washing machine including a water tub, a rotary tub rotatably installed in the water tub, and a motor to rotate the rotary tub, the method comprising:
when a rotational velocity of the motor is less than a spin-drying velocity, determining whether the motor is overloaded based on a command value of the motor; when the motor is overloaded, stopping a driving of the motor to determine a cause of the overload; determining if a drainage error has occurred based on a state in which water is discharged from the water tub while the driving of the motor is stopped; if a drainage error has not occurred, accelerating the motor; and re-determining a cause of the overload by determining if a water filling has occurred or if a bubble generation has occurred, wherein the determining if the water filling has occurred comprises determining that the water filling has occurred when a re-determined command value is less than a predetermined second limit value.