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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11566361 B1

PDFFull Text
Date of Patent:
Jan. 31, 2023

Filed:

Jun. 12, 2020

Drain pump driving apparatus and laundry treatment machine including the same

Applicant:

Lg Electronics Inc., Seoul, KR;

Inventors:

Jungmoon Je, Seoul, KR;

Chungill Lee, Seoul, KR;

Kiwook Lee, Seoul, KR;

Assignee:

LG Electronics Inc., Seoul, KR;

Attorney:

KED & Associates, LLP

Primary Examiner:

Joseph L Perrin

Int. Cl.
CPC ...
D06F 33/48 (2020.01); D06F 39/08 (2006.01); H02P 21/05 (2006.01); D06F 37/40 (2006.01); H02P 23/04 (2006.01); D06F 103/04 (2020.01); D06F 103/18 (2020.01); D06F 103/26 (2020.01); D06F 103/48 (2020.01); D06F 105/48 (2020.01); D06F 105/58 (2020.01); D06F 33/42 (2020.01);
U.S. Cl.
CPC ...
D06F 33/48 (2020.02); D06F 37/40 (2013.01); H02P 21/05 (2013.01); H02P 23/04 (2013.01); D06F 33/42 (2020.02); D06F 39/085 (2013.01); D06F 2103/04 (2020.02); D06F 2103/18 (2020.02); D06F 2103/26 (2020.02); D06F 2103/48 (2020.02); D06F 2105/48 (2020.02); D06F 2105/58 (2020.02); Y02B 40/00 (2013.01);
Abstract

Disclosed herein is a drain pump driving apparatus and a laundry treatment machine including the same. The drain pump driving apparatus and the laundry treatment machine including the same according to an embodiment of the present invention include a motor to operate the drain pump, an inverter to convert a direct current (DC) power to an alternating current (AC) power by a switching operation and output the converted AC power to the motor, an output current detector to detect an output current flowing to the motor, and a controller to control the inverter, wherein the controller may calculate a speed ripple of the motor based on the output current and performs a control operation based on the calculated speed ripple of the motor to change a speed of the motor.

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