| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 068120160 | Motor control circuitry detail | 16 |
| 20080295543 | WASHING MACHINE APPARATUS AND METHOD - A washing machine is provided that includes an induction motor and a motor control circuit with a feedback loop. The feedback loop provides rotor speed to a microprocessor of the motor control circuit. The motor control circuit and feedback loop control the motor such that the motor operates in a reverse frequency mode which provides braking to the washing machine. | 12-04-2008 |
| 20080314090 | Control device for a washing machine - A device and method for controlling a drainage pump of a washing machine. The drainage pump is powered by a synchronous motor that is connected to a mains voltage bus by a switch. During one or more stages of a washing program the switch is operated to apply in each half cycle of the mains voltage a delay time from the zero setting of the mains voltage to cause the motor to operate in a cut-wave mode. | 12-25-2008 |
| 20090056385 | MOTOR CONTROLLER AND WASHING MACHINE - A motor controller includes a power converter energizing a motor based on a commutation signal, the motor including a rotor provided with a permanent magnet and a coil-wound stator; an estimator estimating rotor rotational speed and rotational position; a controller outputting the commutation signal to the power converter, the commutation signal taking a predetermined energization pattern based on a command rotational speed during startup, and being outputted based on the rotational position estimated by the estimator during position estimation; a current detector detecting current flowing in the coil winding; an input power calculator calculating input power of the motor by voltage applied to the coil winding and the current detected by the current detector; an output power calculator calculating output power of the motor by the rotational speed estimate; and a rotational abnormality determiner determining occurrence of rotational abnormality based on comparison of the input power with the output power. | 03-05-2009 |
| 20090064722 | Laundry treatment machine and method of controlling motor of laundry treatment machine - There are provided a laundry treatment machine and a method of controlling the motor of the laundry treatment machine. In the laundry treatment machine and the method of controlling the motor of the laundry treatment machine, when it is sensed that the motor is overloaded, the motor is driven by setting the rotation starting point of the motor back from the previously set position. Therefore, the motor is prevented from being restrained due to the overload of the motor so that it is possible to prevent the abnormal noise of the motor from being generated, to prevent the temperature from rising, and to improve the mobility of the motor. | 03-12-2009 |
| 20090145173 | LAUNDRY MACHINE WITH LOST MOTION CLUTCH - A laundry machine has a tub and a spin basket in said tub. A drive assembly includes a shaft and agitator. The shaft passes through a wall of the spin basket. The agitator is located within the spin basket. A lost motion clutch is physically located in the tub. The lost motion clutch interconnects between the drive assembly and the spin basket and absorbs greater than one revolution of relative rotation. | 06-11-2009 |
| 20100147039 | DEVICE AND METHOD FOR SENSING TEMPERATURE OF A ROTATING ELECTROMAGNETIC MACHINE - A system and method of determining the temperature of a rotating electromagnetic machine, such as an electric motor or generator. A temperature calibration parameter is calculated based on the temperature of an object situated close to the motor, such as a motor drive connected to the motor, and a first resistance value of the winding. In exemplary embodiments, the motor drive and first resistance value are determined only after the motor has been idle for some predetermined time period. Once the calibration parameter is calculated, the processor uses it along with subsequent resistance measurements to calculate the temperature of the motor. | 06-17-2010 |
| 20100251776 | CIRCUIT ARRANGEMENTS FOR OPERATING A HOUSEHOLD APPLIANCE - A circuit for operating a household appliance, wherein the circuit includes a switched-mode power supply for converting the power supply of a public power supply network into direct supply voltage. The circuit also includes a controller that is connected to the switched-mode power supply for being supplied with the direct supply voltage and for controlling processes of the household appliance. An EMC filter is provided to protect the public supply network from interference signals from the household appliance. The EMC filter includes a condenser that is connected between a phase conductor pole and a neutral conductor pole of the public power supply network; a bleeder resistor that is connected in parallel with the condenser; and a switch that can be activated by the controller to connect the condenser and the bleeder resistor to the neutral conductor pole. | 10-07-2010 |
| 20120017647 | LAUNDRY APPLIANCE - A laundry machine configured to supply a first amount of water to the wash tub wherein a wash plate can be oscillated such that clothes items directly above and in contact with the impeller are frictionally dragged in a oscillatory manner with the wash chamber while continuing to oscillate said wash plate, an additional supply of water is added to said wash tub such that as cloth items lost frictional engagement with the wash plate, the cloth items continue to move along an inverse toroidal rollover path at higher water levels. | 01-26-2012 |
| 20120111065 | WASHING MACHINE WITH IMPROVED BRAKING METHOD - A method of braking a washing machine from an operational speed to a zero speed is provided (as well as a washing machine incorporating the method) for a washing machine driven by one of a synchronous or asynchronous motor. Upon receipt of a stop signal, collapsing the motor rotating magnetic fields are collapsed for a predefined time period. After the predefined time period, DC braking voltage is applied to the motor stator windings at a controlled ramp-up rate to a fixed amplitude to generate a controlled ramped braking torque on the motor. The braking torque is applied until the motor is stopped. | 05-10-2012 |
| 20130098119 | WASHING MACHINE AND METHOD FOR CONTROLLING SAME - A washing machine that calculates a temperature of a balancer to effectively control a motor and a method of controlling the washing machine are provided. The washing machine comprises a rotatable drum that receives laundry, a motor that rotates the drum, a balancer that is connected to the drum, the balancer changing a center of gravity of the drum, and a controller that rotates the motor at a constant rotational speed and then calculates a temperature of the balancer based on a period of a variation in rotational speed of the motor. | 04-25-2013 |
| 20130160499 | MOTOR DRIVE DEVICE FOR WASHING MACHINE AND MOTOR CONTROL METHOD THEREOF - Provided is a motor drive device for a motor for a washing machine of a double-rotor/double-stator structure that can selectively rotate a pulsator and a dehydrator without having a separate clutch, and a motor control method thereof. The motor drive device includes: a motor controller that generates a drive signal according to a laundry control signal to thus control a motor for the washing machine to be driven: an inverter that generates three-phase alternating-current (AC) power under the control of the motor controller, and outputs the three-phase AC power to a first three-phase stator coil for rotating an outer rotor in the motor for the washing machine, and a second three-phase stator coil for rotating an inner rotor therein; and a rotor drive controller that is provided between the inverter and the second three-phase stator coil, to thus block or pass the three-phase AC power under the control of the motor controller and simultaneously change the direction of rotation of the inner rotor. | 06-27-2013 |
| 20130233026 | MOTOR AND WASHING MACHINE HAVING THE SAME - Disclosed herein is a washing machine having an improved structure that maintains efficiency over a certain level both in washing and dehydration. The washing machine includes a body, a tub disposed within the body, a drum rotatably disposed within the tub, and a motor coupled to a rear surface of the tub to drive the drum. The motor includes a stator including a plurality of stator cores and a plurality of magnets arranged between the stator cores, and a rotor rotatably disposed at an inner side or outer side of the stator. | 09-12-2013 |
| 20150341124 | ASYNCHRONOUS RECEIVER-TRANSMITTER CIRCUIT AND WASHING MACHINE INCLUDING THE SAME - An asynchronous receiver-transmitter circuit which compensates for an output signal so as to be the same as an input signal upon an asynchronous communication, and a washing machine including the same. The asynchronous receiver-transmitter circuit includes a photo-coupler turned on by an applied input signal to provide an output signal; and a compensation part configured to compensate for a time required while the output signal arrives at a high value to correspond to a time required while the output signal arrives at a low value. | 11-26-2015 |
| 20150354124 | APPLIANCE AND METHOD FOR REMOVING NOISE FROM A MOTOR CHARACTERISTIC SIGNAL IN A LAUNDRY TREATING APPLIANCE - An apparatus and method of sensing a motor characteristic signal in a laundry treating appliance having a drum rotated by a motor about a rotational axis, sampling the motor characteristic signal, filtering the motor characteristic signal, and evaluating the filtered motor characteristic signal for the presence of a predetermined condition corresponding to the motor characteristic signal. | 12-10-2015 |
| 20160201245 | INDUCTION MOTOR TEMPERATURE MEASUREMENT USING PHASE CONTROLLED ALTERNATING CURRENT | 07-14-2016 |
| 20170233926 | APPARATUS AND METHOD FOR MOTOR BRAKING IN WASHING MACHINE | 08-17-2017 |
