Lg Electronics Inc.

Cha Seung Jun

Byoung Wook Min

Jae Hyun Kim

Si Moon Jeon

Soo Young Oh

Seung Chul Park

Gwan Ryong Park

Sung Yong Shin

Sun Ku Kwon

Dong Hyun Lim

Se Hwa Choe

Provided is a vacuum cleaner, including a main body including a power supply part configured to supply power, a first motor configured to generate suction force, and a first printed circuit board (PCB) on which the first controller is mounted, and a nozzle including a cleaning part, a second motor configured to drive the cleaning part and a second PCB equipped with a second controller, the nozzle configured to suck air containing foreign substances by the suction force, wherein a first power line communication from the first controller to the second controller is voltage pulse width modulation (PWM), and a second power line communication from the second controller to the first controller is a current shaping method.

Vacuum cleaner capable of power line communication

Disclosed is a washing machine which includes a tub which holds laundry, a drum which is disposed in and rotates within the tub, a stator which is fixed to the tub, and a rotor which is fixed to the drum. The rotor includes a frame, a bushing installed on the frame, a motor shaft having an end which is inserted in and fixed to the bushing, a bearing interposed between the motor shaft and the tub, and at least one guide disposed between the motor shaft and the bushing at an end of the bushing.

Motor and washing machine using the same

Disclosed is a motor which includes a stator including a plurality of aluminum coils and a rotor. The rotor includes a frame including a magnetic material, and a permanent magnet attached to the frame. The permanent magnet is made of neodymium.

A driving device and a method of driving a washing machine is disclosed. The efficiency of the motor of the washing machine is enhanced and the capacity of an inverter is reduced thereby reducing manufacturing costs. The driving device includes a variable motor, of which the rotational speed varies to apply a driving force to a drum to rotate, an inverter to convert a direct current voltage into an alternating current voltage and to vary a voltage applied to the variable motor, and an inverter driver to compare a control signal with a carrier to drive the inverter by pulse width modulation. A frequency of the carrier wave is varied for the pulse width modulation.

Driving device of a washing machine and a method of driving a washing machine with the same

A motor having a structure configured to reduce magnetic resistance between a rotor and a stator, a method for manufacturing the motor, and a washing machine using the motor are disclosed. The motor includes a rotor, and a stator co-operating with the rotor. The stator includes a main core and an auxiliary core. The main core includes a base and a plurality of teeth protruding from the base. The auxiliary core is structured to prevent the occurrence of magnetic resistance from being generated from spaces, defined between adjacent teeth, when the stator co-operates with the rotor.

Motor, method for manufacturing the same, and washing machine using the same

The present invention provides a washer, damper thereof, and control method thereof, by which noise is reduced by adjusting a damping force of the damper in a manner of turning on/off power of the damper according to an oscillation frequency of a vibrating body such as a washer. The control method reduces noise by supplying power to a damper in an excessive vibration state of a vibrating body such as a washer or by cutting off the power supplied to the damper in a normal vibration state of the vibrating body.

Washer damper thereof, and control method thereof

Provided are a motor and a washing machine using the motor. The motor has a stator, a rotor, a rotor frame, a permanent magnet, and a comb polarizing ring. The rotor rotates against the stator. The permanent magnet is installed on the rotor frame and has protrusions with alternating North and South polarities. The comb polarizing ring includes a plurality of teeth disposed between the protrusions of the permanent magnet, and is formed of a material with a magnetism that is weaker than a magnetism of the protrusions.

Growing community of inventors

Seoul, South Korea

Cha Seung Jun