Abstract: Provided an electronic device including a main body and a kit connected to the main body, and the main body includes a battery, a first motor, an electric wire connected to the battery, and a first controller connected to the electric wire, the kit includes a second motor supplied with power through the electric wire, an inverter connected to the second motor, and a second controller connected to the electric wire and configured to control driving of the inverter, and the second controller is configured to transmit information to the first controller through switching frequency control of the inverter and control a switching frequency of the inverter so that a current associated with the second motor is greater than zero in a section in which transmission of the information is performed.

Abstract: 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.

Abstract: A washing machine includes: a main body forming an external appearance; a tub installed at an inner side of the main body and keeping washing water in storage; a drum rotatably installed at the inner side of the tub; a rotational shaft coupled with the drum to transfer a driving force; a driving motor installed between the tub and the drum to rotate the rotational shaft; and a gasket installed between the drum and the tub and preventing leaked washing water from being introduced to the driving motor.

Abstract: A motor, and a method and apparatus for controlling the motor for a washer are provided. The motor includes a stator on which a plurality of coils are wound and disposed in a circular shape, a rotor having a plurality of permanent magnets spaced apart from the coils by a predetermined distance, and a motor controller performing a vector control method for controlling a current vector applied on a d-q axis rotating coordinate system in a start mode of the rotor to make a current speed of the rotor follow a reference speed of the rotor by comparing the current speed with the reference speed. The motor controller includes a speed/position detector for detecting the current speed and a current position of the rotor using an on/off signal of a hall sensor installed on the stator.

Abstract: 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.

Abstract: A washing machine includes: a main body forming an external appearance; a tub installed at an inner side of the main body and keeping washing water in storage; a drum rotatably installed at the inner side of the tub; a rotational shaft coupled with the drum to transfer a driving force; a driving motor installed between the tub and the drum to rotate the rotational shaft; and a gasket installed between the drum and the tub and preventing leaked washing water from being introduced to the driving motor.

Abstract: 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.

Abstract: A motor, and a method and apparatus for controlling the motor for a washer are provided. The motor includes a stator on which a plurality of coils are wound and disposed in a circular shape, a rotor having a plurality of permanent magnets spaced apart from the coils by a predetermined distance, and a motor controller performing a vector control method for controlling a current vector applied on a d-q axis rotating coordinate system in a start mode of the rotor to make a current speed of the rotor follow a reference speed of the rotor by comparing the current speed with the reference speed. The motor controller includes a speed/position detector for detecting the current speed and a current position of the rotor using an on/off signal of a hall sensor installed on the stator.

Abstract: 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.

Abstract: A motor, and a method and apparatus for controlling the motor for a washer are provided. The motor includes a stator on which a plurality of coils are wound and disposed in a circular shape, a rotor having a plurality of permanent magnets spaced apart from the coils by a predetermined distance, and a motor controller performing a vector control method for controlling a current vector applied on a d-q axis rotating coordinate system in a start mode of the rotor to make a current speed of the rotor follow a reference speed of the rotor by comparing the current speed with the reference speed. The motor controller includes a speed/position detector for detecting the current speed and a current position of the rotor using an on/off signal of a hall sensor installed on the stator.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The motor of the present invention comprises; a stator, a rotor rotating to the stator and a permanent magnet installed to the rotor, wherein the permanent magnet is a single body and formed continuously.

Abstract: Disclosed are a combination type damper and a washing machine having the same. The combination type damper comprises: a cylinder provided with a receiving space having a certain depth at one side thereof; a rod relative-movably inserted into the receiving space of the cylinder; and a composite damping means for generating a damping force by an electromagnetic force when a displacement of a relative movement of the cylinder and the rod is less than a preset length, and for generating a frictional damping force when the displacement of the relative movement is more than the preset length. Transient state vibration and steady state vibration generated from a tub assembly during the entire processes for washing laundry are prevented from being transmitted to a cabinet, thereby minimizing vibration noise towards outside while using the washing machine.

Abstract: Disclosed are a combination type damper and a washing machine having the same. The combination type damper comprises: a cylinder provided with a receiving space having a certain depth at one side thereof; a rod relative-movably inserted into the receiving space of the cylinder; and a composite damping means for generating a damping force by an electromagnetic force when a displacement of a relative movement of the cylinder and the rod is less than a preset length, and for generating a frictional damping force when the displacement of the relative movement is more than the preset length. Transient state vibration and steady state vibration generated from a tub assembly during the entire processes for washing laundry are prevented from being transmitted to a cabinet, thereby minimizing vibration noise towards outside while using the washing machine.