Patent application number | Description | Published |
20080301884 | Washing machine and method of controlling the same - Disclosed herein is a washing machine including a balancer, which increases the speed of a rotation tub stepwise in a period in which an excessive vibration of a water tub occurs to pass the excessive vibration period without the vibration, and a method of controlling the same. The method of controlling the washing machine includes increasing the speed of the rotation tub stepwise in the period in which the excessive vibration of the water tub occurs; measuring current of a motor to detect an amount of unbalance while the speed of the rotation tub is increased stepwise; and controlling the speed of the rotation tub based on the detected amount of unbalance. | 12-11-2008 |
20090183318 | Drum type washing machine having ball balancers and controlling method of the same - Disclosed herein are a drum type washing machine having ball balancers and a controlling method of the same that are capable of reducing spin-drying time. The drum type washing machine having ball balancers according to the present invention includes a rotary tub having the ball balancers mounted therein, a wash motor to rotate the rotary tub, and a controller to detect the eccentricity amount of the rotary tub while controlling the rotary tub to be rotated at a first rotation speed, and, when the rotation speed of the rotary tub reaches a second rotation speed, to control the rotary tub, such that the rotary tub is decelerated to a third rotation speed and a drainage process is carried out. | 07-23-2009 |
20090260163 | Washing machine and method of controlling the same - Disclosed herein are a washing machine and a method of controlling the same that are capable of removing bubbles from a door after washing. The washing machine includes a drum and a door to open and close the drum. The method of controlling the washing machine includes determining whether the present operation is a spin-drying operation, and, when the present operation is the spin-drying operation, supplying water to the door to remove residual bubbles from the door. | 10-22-2009 |
20100045226 | Method of controlling washing machine and motor - A method of controlling a washing machine and a motor determines whether a BLDC motor is in a normal state in software without hardware and a user is notified of an abnormal state of the BLDC motor if the BLDC motor is in an abnormal state, thereby ensuring safety. When the motor is rotated, the state of the motor is determined by applying harmonics to a voltage that is applied to a motor and analyzing an output frequency characteristic. When the motor is stopped, the state of the motor is determined by estimating the temperature of the motor. | 02-25-2010 |
20100139011 | Method of controlling washing machine - A method of controlling a washing machine, capable of detecting clothes contained in the washing machine by rotating a drum. The method includes supplying a predetermined amount of water when a barrel cleaning is executed, soaking an interior of a drum in water, draining water after the interior of the drum has been soaked in the water, and detecting clothes contained in the drum by rotating the drum. Whether to perform a barrel cleaning is determined according to the existence of the clothes in the drum, so that vibration and noise are prevented from being generated in the washing machine, and accident due to the movement of the washing machine is prevented. | 06-10-2010 |
20110094270 | Washing machine and balancer thereof - The washing machine includes a rotating tub arranged to be rotatable about a shaft. A first mass member is mounted to the rotating tub so as not to be moved relative to the rotating tub in a circumferential direction of the rotating tub. The first mass member serves to apply load imbalance to the rotating tub upon rotation of the rotating tub. Also, a second mass member is arranged to be movable in the circumferential direction of the rotating tub. The second mass member serves to compensate for load imbalance of the rotating tub upon rotation of the rotating tub. | 04-28-2011 |
20110252577 | WASHING MACHINE AND CONTROL METHOD THEREOF - A washing machine and a control method thereof in which a tub washing course is safely performed using a sensor to measure vibration of a tub. Since whether or not laundry is present in s drum is sensed while performing the tub washing course, consumption of separate time, water, and energy to sense whether or not laundry is present is not required, and operation of the washing machine is controlled by diagnosing malfunction of the sensor. If plural sensors are installed, a micro-computer is connected to the plural sensors in common through a Serial Peripheral Interface (SPI) communication method or an Inter Integrated circuit (I2C) communication method, thereby reducing costs and volume of wire-harness. | 10-20-2011 |
20130335041 | POWER CONVERSION APPARATUS AND METHOD OF CONTROLLING THE SAME - A power conversion apparatus including a current source converter configured to convert Alternate Current (AC) power to Direct Current (DC) power; a power controller configured to set a d-axis current command and a q-axis current command, which correspond to the AC power to the current source converter, by reflecting a difference between a measurement DC link voltage measured at an output terminal of the current source converter and a DC link voltage set by a DC link voltage command; and a phase angle controller configured to adjust a phase angle of the current source converter and transmit the adjusted phase angle to the current source converter, in response to the d-axis current command and the q-axis current command. | 12-19-2013 |
20140035495 | METHODS AND APPARATUSES FOR OBTAINING MAXIMUM MAGNETIC FLUX OF PERMANENT MAGNET SYNCHRONOUS MOTORS - A method of obtaining a maximum magnetic flux of a permanent magnet synchronous motor may comprise: receiving a first command voltage from a current controller to control current applied to the permanent magnet synchronous motor; receiving an on/off duty ratio of a control pulse signal to control an output voltage of an inverter that drives the permanent magnet synchronous motor, the on/off duty ratio being determined based on the first command voltage; generating a second command voltage corresponding to the output voltage to be output from the inverter based on the on/off duty ratio of the control pulse signal; obtaining a maximum command voltage error by comparing the first and second command voltages; and/or obtaining the maximum command magnetic flux of the permanent magnet synchronous motor according to a position of a rotor of the permanent magnet synchronous motor based on the maximum command voltage error. | 02-06-2014 |
20140070755 | METHODS AND APPARATUSES FOR CONTROLLING OUTPUT VOLTAGES OF INVERTERS DRIVING ELECTRIC MOTORS - A method of controlling an output voltage of an inverter driving an electric motor may include calculating a current total harmonic distortion (THD) of a current output to the electric motor; comparing the current THD with a reference current THD; determining a pulse width modulation (PWM) method to be changed from a first modulation method that reduces harmonic components of the current output to the electric motor to a second modulation method when the current THD is less than the reference current THD, the PWM method modulating a pulse width of a control pulse signal for controlling the output voltage of the inverter; and/or generating the control pulse signal based on the determined PWM method. | 03-13-2014 |
20140197765 | METHODS AND APPARATUSES FOR CONTROLLING OUTPUT VOLTAGES OF INVERTERS DRIVING OF ELECTRIC MOTORS - A method of controlling an output voltage of an inverter driving an electric motor may include removing harmonic components of an output current, which is output to the electric motor, by using a low pass filter and obtaining a fundamental component of the output current; calculating a current total harmonic distortion by using the fundamental component of the output current; comparing the current THD with a reference current THD; determining a pulse width modulation method to be changed from a first modulation method for reducing the harmonic components of the output current to a second modulation method for reducing a switching frequency of the inverter if the current THD is less than the reference current THD, the PWM method modulating a pulse width of a control pulse signal for controlling the output voltage of the inverter; and/or generating the control pulse signal based on the determined PWM method. | 07-17-2014 |
20140202216 | WASHING MACHINES - A washing machine may comprise a cabinet; a first tub fixedly mounted in an inside of the cabinet and configured to accommodate wash water; a second tub configured to accommodate laundry and rotatably mounted inside of the first tub; a drive motor mounted outside of the first tub and configured to rotate the second tub; a driving circuit unit connected with the drive motor so as to apply a driving signal to the drive motor; and/or a water-cooling cooler unit configured to cool the drive motor and the drive circuit unit with the wash water accommodated in the first tub. | 07-24-2014 |
20140208524 | METHOD OF CONTROLLING WASHING MACHINE - A method of controlling a washing machine includes detecting a water level in a drum when a barrel cleaning is executed; supplying or draining water according to the detected water level such that a water level reaches a reference water level; soaking an interior of the drum in water; draining water after the interior of the drum is soaked in water; and detecting clothes contained in the drum by rotating the drum. | 07-31-2014 |
20140375234 | METHODS AND APPARATUSES FOR COMPENSATING FOR FRICTION TORQUES OF PERMANENT MAGNET SYNCHRONOUS MOTORS - A method of compensating for a friction torque of a permanent magnet synchronous motor may include: receiving input of a motor current and a rotor speed of the permanent magnet synchronous motor; estimating a motor torque based on the input motor current; acquiring a first friction torque corresponding to the input rotor speed and the estimated motor torque by using a lookup table of friction torques; compensating for a second friction torque of the permanent magnet synchronous motor based on the first friction torque, wherein the compensating is in response to a first torque command input to control driving of the permanent magnet synchronous motor and outputs a second torque command that compensates for the second friction torque; and/or controlling the driving of the permanent magnet synchronous motor based on the second torque command. | 12-25-2014 |
20140375236 | METHODS AND APPARATUSES FOR CONTROLLING TORQUES OF PERMANENT MAGNET SYNCHRONOUS MOTORS - A method of controlling torque of a permanent magnet synchronous motor (PMSM) by using a speed-torque lookup table may include: receiving a current direct-current (DC) link voltage of an inverter configured to drive the PMSM and a speed of a rotor of the PMSM; calculating a change ratio of a DC link voltage based on the current DC link voltage and a DC link voltage at a time when the speed-torque lookup table is generated; calculating a normalized speed of the rotor according to a change in the DC link voltage by using the speed of the rotor and the change ratio of the DC link voltage; and/or transferring the normalized speed of the rotor as an input to the speed-torque lookup table. | 12-25-2014 |