US 12,448,715 B2
Washing machine and controlling method for the same
Wonjae Han, Suwon-si (KR); Jeonggi Hong, Suwon-si (KR); Sungjong Kim, Suwon-si (KR); Hooijoong Kim, Suwon-si (KR); Sukwoo Park, Suwon-si (KR); Jaepoong Lee, Suwon-si (KR); and Sooyeon Jin, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Sep. 29, 2022, as Appl. No. 17/955,762.
Application 17/955,762 is a continuation of application No. PCT/KR2022/013479, filed on Sep. 7, 2022.
Prior Publication US 2023/0175187 A1, Jun. 8, 2023
Int. Cl. D06F 34/08 (2020.01); D06F 33/42 (2020.01); D06F 33/47 (2020.01); D06F 33/48 (2020.01); D06F 34/34 (2020.01); D06F 37/30 (2020.01); D06F 39/08 (2006.01); D06F 103/18 (2020.01); D06F 103/42 (2020.01); D06F 103/48 (2020.01); D06F 105/08 (2020.01); D06F 105/58 (2020.01)
CPC D06F 34/08 (2020.02) [D06F 33/42 (2020.02); D06F 33/47 (2020.02); D06F 33/48 (2020.02); D06F 34/34 (2020.02); D06F 37/30 (2013.01); D06F 39/08 (2013.01); D06F 39/082 (2013.01); D06F 39/085 (2013.01); D06F 2103/18 (2020.02); D06F 2103/42 (2020.02); D06F 2103/48 (2020.02); D06F 2105/08 (2020.02); D06F 2105/58 (2020.02)] 20 Claims
OG exemplary drawing
 
1. A washing machine comprising:
a washing tub;
a drain pump configured to drain water in the washing tub;
a pump motor configured to operate the drain pump;
an inverter circuit configured to supply a driving current to the pump motor to operate the drain pump; and
a controller configured to:
control the inverter circuit to supply pre-set reference power to the pump motor based on a start of a draining course;
determine reference revolutions per minute (rpm) based on an average value of an operating rpm of the pump motor during a preset period of time in which the pre-set reference power is supplied to the pump motor; and
in response to the determining of the reference rpm, control the inverter circuit to operate the pump motor at the determined reference rpm.