Clothing treatment device and control method therefor

A clothing treatment device comprising:

• a cabinet forming an exterior;
• a tub provided in the cabinet and configured to store water;
• a drum provided to the tub in a rotatable manner and configured to receive clothing;
• a drainage unit configured to drain the water from the tub;
• a driving unit including a motor configured to rotate the drum;
• and
• a controller configured to control the clothing treatment device to perform a clothing amount sensing operation of sensing a weight of the clothing, a water supply operation of supplying the water to the tub, a first dehydration operation of maintaining at least a portion of the supplied water and rotating the drum while drainage is stopped, and a second dehydration operation of rotating the drum at a drum rotation speed higher than a maximum drum rotation speed in the first dehydration operation,
• wherein the drainage is performed in at least a portion of periods after the first dehydration operation,
• wherein the drainage is performed when the drum rotation speed corresponds to drainage revolutions per minute (RPM), and
• wherein the drainage RPM is determined based on at least one of a vibration value and a temperature value of a power module that are measured in the first dehydration operation.