Washing machine

A washing machine comprising:

• a fixed tub;
• a rotating tub which is rotatably accommodated in the fixed tub and into which laundry is inserted;
• a drain mechanism configured to discharge water collected in the fixed tub;
• a driving unit including a clutch switchable to a first mode in which a rotational force of a motor is transferred to the rotating tub via a reducer and a second mode in which the rotational force of the motor is transferred to the rotating tub without being through the reducer;
• and
• a controller including a processor configured to control a driving operation of a washing machine, wherein the driving operation includes a first process and a second process including a dewatering process,
• wherein the controller is further configured to,
• in the first process before the second process, set the clutch to the first mode and control the motor in a way such that a rotation speed of the rotating tub is a first rotation speed, which is greater than or equal to a certain rotation speed set to generate a centrifugal force to make the laundry stuck to an internal wall of the rotating tub, and
• in the second process, control the drain mechanism in a way such that water collected in the fixed tub is discharged, set the clutch to the second mode, and control the motor in a way such that the rotation speed of the rotating tub is a second rotation speed, which is greater than the first rotation speed.