公开(公告)号：US11377771B2

公开(公告)日：2022-07-05

申请号：US16586466

申请日：2019-09-27

Applicant: LG Electronics Inc.

Inventor： Jinho Kim ,  Bongjae Kim ,  Jaehyun Kim

IPC: D06F37/20 ,  D06F33/48 ,  D06F37/30 ,  D06F105/48

Abstract: A washing machine includes: a tub; a transmission coil provided in the tub and transmitting power wirelessly; an ammeter measuring an input current value of the transmission coil; a cylindrical drum disposed inside the tub and configured to rotate; a balancer for reducing unbalance during rotation of the drum; and a controller controlling the ammeter and the balancer. The balancer includes: a reception coil provided in the drum and configured to generate power from magnetic field formed by the transmission coil; drive modules driven by power of the reception coil and provided in the drum; and at least one balancing weight that moves along a circumference of the drum by a driving force of each drive module, and changes a center of gravity of the drum. The controller determines a position of the balancing weights based on the input current value when the drum rotates.

公开(公告)号：US11091869B2

公开(公告)日：2021-08-17

申请号：US16656101

申请日：2019-10-17

Applicant: LG Electronics Inc.

Inventor： Bongjae Kim ,  Jaehyun Kim ,  Jinho Kim

IPC: D06F33/48 ,  D06F37/20 ,  D06F33/00 ,  D06F37/22 ,  D06F37/30

Abstract: The present invention relates to a balancer and a washing machine including the same. The balancer includes at least two drive modules which provide a driving force; at least two gear rails having a ring shape which are gear-coupled to each of the drive modules and rotated; at least two balancing weights which move along a circumference of a drum by the rotation of each of the gear rails and change a center of gravity of the drum; a reception coil which generates power from a magnetic field formed by a transmission coil; and a guide case which accommodates at least the reception coil and the drive modules.