Lg Electronics Inc.

Woon Yong Lee

Jong Ho Kim

In Haeng Cho

Bon Kwon Koo

Jong Chul Bang

Jae Cheol Lyu

Kwon Ki Hong

Kweon Son

Min Jin Oh

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.

A dehydrating method of a drum type washing machine for precisely detecting a single load for a dehydrating cycle to effectively dehydrate is disclosed. A drum type washing machine for detecting a single load to distinguish the detected single load into a long single load and a short single load, so that effective dehydrating is carried out, is disclosed. The dehydrating method includes the step of determining whether the laundry is the single load. A following dehydrating method varies with whether the laundry is the single load or not.

Dehydrating method of drum type washing machine

The present invention provides an outer rotor type motor for a drum type washing machine to reduce material and weight for fabrication, simplify fabrication process, provide stable assembly of a stator to a fixing side such as a tub or a bearing housing, prevent by assembly interference caused by a difference in the tips in assembling the upper and lower insulators the stator and enhancing loading efficiency of a cylindrical sleeve provided to inner circumference of fastening holes of the upper and lower insulators. The present invention includes a helical core having multiple layers formed by winding steel plates in a helix, the steel plate having a base portion with teeth projected from the base portion, an upper and lower insulators of an electric insulating material covered on upper and lower sides of the helical core in shapes complementary to shapes of the helical core, respectively, and at least three fastening portions formed as one body in each of the upper and lower insulators and projected from an inside of the helical core toward a center of the stator, wherein a boss forming a fastening hole for securing the stator to a tub wall with fastening members is provided, wherein a ridge portion, projected toward the confronting insulator, is provided to a vicinity of the boss, and wherein the ridge portions are pressed closely together in assembling the upper and lower insulators.

Stator of outer rotor type motor for drum type washer

The present invention provides an outer rotor type motor for a drum type washing machine to reduce material and weight for fabrication, simplify fabrication process, provide stable assembly of a stator to a fixing side, such as a tub or a bearing housing, prevent unwinding of stacked steel plates in assembling a helical core, and reduce stress on the steel plates of the core. The present invention includes a helical core having multiple layers formed by winding steel plates in a helix starting from a bottom layer to a top layer, the steel plate having a base portion with teeth projected from the base portion, an upper insulator of an electric insulating material covered on an upper side of the helical core in a shape complementary to a shape of the helical core, a lower insulator of an electric insulating material covered on a lower side of the helical core at the time of assembly with the upper insulator having a shape complementary to a shape of a helical core, and a fastening means for at least two steel plates wound in a helix to prevent unwinding of any two adjacently stacked steel plates and prevent gaps between any two adjacent layers of the stacked steel plates.

Stator of outer rotor type motor for drum type washing machine

The present invention provides an outer rotor type motor for a drum type washing machine to reduce material and weight for fabrication, simplify fabrication process, provide stable assembly of a stator to a fixing side, such as a tub or a bearing housing, prevent unwinding of stacked steel plates in assembling a helical core, and reduce stress on the steel plates of the core. The present invention includes a helical core having multiple layers formed by winding steel plates in a helix starting from a bottom layer to a top layer, the steel plate having a base portion with teeth projected from the base portion, wherein the steel plates are blanked on an electrical steel sheet in pairs opposing each other with the teeth alternately crossing each other, an upper insulator of an electric insulating material covered on an upper side of the helical core in a shape complementary to a shape of the helical core, and a lower insulator of an electric insulating material covered on a lower side of the helical core at the time of assembly with the upper insulator having a shape complementary to a shape of a helical core.

Stator of outer rotor type motor for drum type washer and fabricating method thereof

The present invention provides an outer rotor type motor for a drum type washing machine to reduce material and weight for fabrication, simplify fabrication process, provide stable assembly of a stator to a fixing side, such as a tub or a bearing housing, prevent unwinding of stacked steel plates in assembling a helical core, and reduce stress on the steel plates of the core. The present invention includes a helical core having multiple layers formed by winding steel plates in a helix starting from a bottom layer to a top layer, the steel plate having a base portion with teeth projected from the base portion, wherein the teeth have arched shape tips for reducing vibration and noise generated by cogging torque of the helical core, an upper insulator of an electric insulating material covered on an upper side of the helical core in a shape complementary to a shape of the helical core, and a lower insulator of an electric insulating material covered on a lower side of the helical core at the time of assembly with the upper insulator having a shape complementary to a shape of a helical core.

Growing community of inventors

Gwangsan-gu, South Korea

Woon Yong Lee