Abstract: A washing machine and a method of controlling a washing machine are provided. The washing machine may include a drum in which laundry is provided and is rotated. The drum may operate at a first speed such that part of the laundry tumbles within the drum and another part of the laundry adheres to the drum. An unbalance amount or a first speed operation time of the drum, which is detected when the drum operates at the first speed, may be determined. When an abnormality occurs, rotation of the drum may stop or decelerate. Accordingly, at the time of a dehydration cycle, stability of the washing machine and laundry balancing can be ensured.

Abstract: The present invention relates to a washing machine and a method of controlling the washing machine. According to a washing machine and a method of controlling the washing machine in accordance with the present invention, a drum operates at a first speed so that part of the laundry tumbles within the drum and another part of the laundry adheres within the drum. The drum operates at a second speed lower than the first speed so that an amount of the tumbling laundry is more increased than at the first speed. Accordingly, at the time of a dehydration cycle, stability of the washing machine and laundry balancing can be ensured.

Abstract: The present invention relates to a washing machine and a method of controlling the washing machine. According to the washing machine and the method of controlling the washing machine in accordance with the present invention, the drum is operated at a first speed so that part of laundry tumbles within the drum and another part of the laundry adheres to the drum. When a unbalance amount of the drum operating at the first speed is a first specific value or less, increasing the speed of the drum to a second speed so that the laundry adheres to the drum. When a unbalance amount of the drum detected during increasing to the second speed is a second specific value or more, decelerating the rotation of the drum. Accordingly, at the time of a dehydration cycle, stability of the washing machine and laundry balancing can be ensured.

Abstract: The present invention relates to a washing machine and a method of controlling a washing machine. According to the washing machine and the method of controlling the washing machine in accordance with the present invention, the drum is operated at a first speed so that laundry tumbles within the drum. A laundry amount within the drum during the first speed operation is sensed. The drum is driven at a second speed so that part of the laundry tumbles within the drum and another part of the laundry adheres to the drum. Operation commands for driving the drum subsequent to the first speed operation are changed based on the sensed laundry amount. Accordingly, at the time of a dehydration cycle, stability of the washing machine and laundry balancing can be ensured.

Abstract: The present invention relates to a washing machine and a method of controlling the washing machine. According to a washing machine and a method of controlling the washing machine in accordance with the present invention, a drum operates at a first speed so that part of the laundry tumbles within the drum and another part of the laundry adheres to the drum. The laundry amount within the drum is sensed during the first speed operation. Operation commands for driving the drum after the first speed operation are changed based on the sensed laundry amount. Accordingly, at the time of the dehydration cycle, stability of the washing machine and laundry balancing can be ensured.

Abstract: In an air conditioner including a plurality of outdoor units, a first outdoor unit includes: a converter that receives commercial AC power and converts the received commercial AC power into DC power; and at least one first outdoor fan inverter that converts the DC power into AC power to drive a motor for at least one first outdoor fan, and a second outdoor unit includes: at least one second outdoor fan inverter that receives the DC power which has been converted by the converter and converts the received DC power into AC power to drive a motor for at least one second outdoor fan.

Abstract: The present invention relates to a method of controlling a three-phase motor of an air conditioner by using an inverter including a total of three pairs of upper and lower arm switching elements connected in parallel, wherein the motor includes a stator coil and a rotor of a permanent magnet and the upper and lower arm switching elements are connected in series to form a pair, the method including the steps of performing field weakening control in order to improve a velocity of the rotor by offsetting an amount of magnetic flux, generated by the permanent magnet, in a state where a PWM signal having a maximum duty is applied to the motor, and controlling a zero vector application time applied to the upper arm switching elements or the lower arm switching elements to become a specific value or more. Accordingly, a minimum zero vector application time can be secured.

Abstract: The present invention relates to a motor controller for air conditioner including a converter converting AC utility power into DC power; an inverter for compressor having a plurality of switching elements for inverter, the inverter converting the DC power into predetermined AC power by a switching operation to drive a three-phase motor; and a microcomputer controlling the converter and the inverter and outputting an inverter switching control signal to the inverter, wherein the microcomputer enables a control period of the inverter to conform to a period of an inverter interrupt signal for outputting the inverter switching control signal. The present invention may reduce manufacturing costs.

Abstract: The present invention relates to a motor controller of an air conditioner, including a converter for converting a commercial AC power into a DC power, an inverter including a plurality of switching elements, the inverter receiving the DC power, converting the DC power into an AC power through a switching operation and driving a three-phase motor, a gate driver for controlling the switching operation of the switching elements, and a plurality of voltage drop units connected between the converter and the gate driver, the voltage drop units dropping the DC power and supplying driving voltages for an operation of the switching elements. Accordingly, circuit elements within a controller can be protected.

Abstract: The present invention relates to a motor controller of an air conditioner, including an inverter including a plurality of switching elements and adapted to convert a DC voltage, input through switching operations of the switching elements, into an AC voltage and supply the converted voltage to a motor, a power calculation unit that calculates electric power applied to the motor, an angle calculation unit that calculates an optimal phase angle of a current command value based on the calculated electric power; and a microcomputer that outputs a switching control signal to control the switching elements of the inverter based on the optimal phase angle.

Abstract: The present invention relates to a motor controller for air conditioner including a converter having at least one switching element for converter, the converter converting AC utility power into DC power by a switching operation of the switching element; an inverter having at least one switching element for inverter, the inverter converting the DC power into prescribed AC power by a switching operation of the switching element and driving a three-phase motor; a microcomputer outputting a converter switching control signal that controls the switching element for converter; and a dc terminal signal generator detecting a dc terminal voltage that is applied across an dc terminal of the converter to sequentially generate a pulse type dc terminal signal, and insulating the dc terminal from the microcomputer. The present invention may sequentially generate a dc terminal signal and simultaneously insulate the dc terminal from the microcomputer, thus making it possible to improve the stability of the motor controller.

Abstract: The present invention relates a motor controller and a motor control method of controlling a motor having a stator coil and a rotator.

Abstract: The present invention relates to a motor controller for an air conditioner and a motor control method. The motor controller including a converter converting AC utility power into DC power and an inverter having a plurality of switching elements, the inverter receiving the DC power, converting the received DC power into AC power by switching operations of the switching elements, and supplies the AC power to a motor, the motor controller further including: a current detector detecting a current flowing in the motor controller; a temperature detector detecting a temperature in the motor controller or a temperature ambient to the motor controller; and a controller calculating a loading based on at least one of room temperature, setup temperature, and inner unit capacity and setting up a final target frequency for driving the motor based on the calculated loading and at least one of the detected current and the detected temperature.