Lg Electronics Inc.

Min Jin Oh

In Haeng Cho

Bon Kwon Koo

Jae Cheol Lyu

Kwon Ki Hong

Jong Ho Kim

Jong Chul Bang

Woon Yong Lee

Kweon Son

Du Heig Choi

A control system for a motor-driven washing machine. The control system includes an electrical motor; a driving unit that applies an input voltage to the motor to drive the motor; a voltmeter that measures a reverse voltage generated by the motor for each predetermined period; and a microprocessor reducing a speed of the motor if the measured reverse voltage is less than or equal to a predetermined voltage level.

Method of controlling motor-driven washing machine and control system for the same

A method of controlling a motor-driven washing machine. The method includes increasing a speed of a motor from zero to a first predetermined speed W. Reducing the motor speed from Wto a second predetermined speed Wand measuring the deceleration period. Increasing the motor speed from Wto a third predetermined speed Wand braking the motor according to a slow brake logic if a first interruption of the motor is ordered during the step of increasing the motor speed from Wto W. Increasing the motor speed from Wto a fourth predetermined speed Wand selecting one of plurality of rapid-brake logics on the basis of the measured deceleration period and braking the motor according to the selected rapid-brake logic if a second interruption of the motor is ordered during the step of increasing the motor speed from Wto W.

Device and method for detecting malfunction of a clutch in a washing machine, the device including a clutch including a coupling for transmission of a power from a motor to a washing shaft or a spinning shaft, a clutch motor () for providing a power to the coupling, a switch for controlling the coupling, and a cam () fitted to be rotatable with the clutch motor for turning on/off the switch in response to the rotation, a power supplying part for supplying a voltage to the motor and the clutch motor (), a pulse counting part for counting a number of pulses of a voltage supplied to the clutch motor from the power supplying part, and a microcomputer for repeating a process in which the clutch motor is stopped for a second set time period (S) and operated again if the switch is not switched for a first set time period from a time the clutch motor is put into operation, and informs to a user that the clutch is in malfunction if the switch is not switched while the process is repeated equal to or more than a set times, thereby determining the clutch of being out of order and informing a result of the determination to a user.

Apparatus and method for detecting malfunction of a clutch of washing machine

Control panels for a drum type washing machine, and a dryer including a first control panel mounted on a position for a drum type washing machine or a dryer, having a key part for applying a command for controlling the drum type washing machine or the dryer, and a display part for displaying an image in accordance with the command applied through the key part, a second control panel mounted on a position for the drum type washing machine or the dryer in symmetry with the first control panel, having a key part for applying a command for controlling the drum type washing machine or the dryer, and a display part for displaying an image in accordance with the command applied through the key part, in symmetry with the key part, and the display part in the first control panel respectively, and a first, and a second controlling parts connected to the first control panel or the second control panel, for controlling operation of the appliances according to the command of the user applied through the first control panel or the second control panel.

Control panels for drum type washing machine and dryer

Device and method for controlling a drain motor, in which a drain valve is driven with reference to a position of drain valve, for optimal control of the drain motor, the device including a drain motor cam connected to a shaft of the drain motor having a detecting point for detecting a bottom dead center of a drain valve marked on one region of a circumference thereof, a switching unit for detecting a position of detecting point of the drain motor cam when the drain motor cam is rotated to provide a position detecting signal, and a microcomputer for receiving the position detecting signal from the switching unit, to identify a position of the drain valve, and controlling operation of the drain motor according to a result of the identification.

Growing community of inventors

Changwon-shi, South Korea

Min Jin Oh