CPC D06F 33/42 (2020.02) [D06F 34/10 (2020.02); D06F 39/08 (2013.01); D06F 39/083 (2013.01); D06F 37/36 (2013.01)] | 15 Claims |
1. A laundry treatment machine comprising:
a washing tub;
a main motor configured to supply torque to the washing tub;
a pump;
a pump motor configured to operate the pump;
a pump driving apparatus configured to drive the pump motor; and
a main controller configured to control the pump driving apparatus to operate the pump based on changes in speed of the main motor during dewatering,
wherein, when the main motor speeds up to be within a range between a first speed and a second speed greater than the first speed, the main controller is configured to control the pump motor to decrease the speed for a set period of time, to increase the speed from a third speed to a fourth speed greater than the third speed after the decrease of the speed for the set period of time, and to maintain the third speed after the increase of the speed from the third speed to the fourth speed.
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