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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 11236460 B1

PDFFull Text
Date of Patent:
Feb. 01, 2022

Filed:

Apr. 18, 2017

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:

Michael E Barr

Assistant Examiner:

Omair Chaudhri

Int. Cl.
CPC ...
D06F 39/08 (2006.01); D06F 33/42 (2020.01); H02P 21/18 (2016.01); H02P 21/22 (2016.01); H02P 21/14 (2016.01); H02P 27/12 (2006.01); D06F 103/48 (2020.01); D06F 37/12 (2006.01); D06F 105/46 (2020.01);
U.S. Cl.
CPC ...
D06F 39/085 (2013.01); D06F 33/42 (2020.02); D06F 37/12 (2013.01); H02P 21/14 (2013.01); H02P 21/18 (2016.02); H02P 21/22 (2016.02); H02P 27/12 (2013.01); D06F 2103/48 (2020.02); D06F 2105/46 (2020.02); H02P 2201/03 (2013.01); H02P 2201/15 (2013.01); Y02B 40/00 (2013.01);
Abstract

Disclosed is a drain pump driving apparatus and a laundry treatment machine including the same. The laundry treatment machine includes: a drain pump driving apparatus configured to drive a drain pump, wherein the drain pump driving apparatus includes: a motor to drive 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 configured to control the inverter, wherein the controller is further configured to calculate a speed of the motor based on an output current, and calculate a lift, which is a difference between a water level of a water introduction part through which water flows into the drain pump and s water level of a water discharge part for discharging water from the drain pump, based on the calculated speed.

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