Amotech Co., Ltd.

Hak Rok Kim

Byung Soo Kim

Hyung Hwan Ko

Se Ki Lee

Provided is a washing machine including: a washing tub connected with an outer rotor and an outer shaft; a pulsator connected with an inner rotor and an inner shaft; and a planetary gear set mounted between the inner rotor and the pulsator and between the outer rotor and the washing tub, to thus reduce a rotational force of the inner shaft, wherein at least one of the pulsator and the washing tub is rotated during performing a washing stroke by allowing the washing tub to be rotated for a period of time when the pulsator is stopping, to thus minimize a washing machine stop time during performing a washing stroke to thereby enhance a running rate and improve washing efficiency.

Washing machine and operating method for same

Provided is a washing machine including: a washing tub connected with an outer rotor and an outer shaft; a pulsator connected with an inner rotor and an inner shaft; and a planetary gear set mounted between the inner rotor and the pulsator and between the outer rotor and the washing tub, to thus reduce a rotational force of the inner shaft, wherein the rotational force of the inner rotor is transmitted to the washing tub by the planetary gear set when a load is applied to the pulsator at the time of an initial start of the inner rotor, to thus lower a starting current and lower an end current at a time when the inner rotor is stopped, to thereby reduce power consumption.

Washing machine and a method for operating same

A washing machine driving apparatus comprises: a drive motor of a double rotor-double stator structure where the drive motor comprises an inner rotor and an outer rotor controllable independently by a double stator, and optionally generating inner rotor output and outer rotor output; a first inner shaft transferring the inner rotor output as a first input; a first outer shaft rotatably coupled to an outer periphery of the first inner shaft, and transferring the outer rotor output as a second input; a planetary gear unit where a gear ratio of a transmission output generated from a carrier is controlled by the second input applied to a ring gear through the first outer shaft, when the first input is applied to a sun gear through the first inner shaft; and a protection unit protecting the inner rotor where an outer peripheral portion of protection unit is supported by the double stator.

Washing machine driving apparatus and washing machine including same

A double stator includes: a stator core; a bobbin wrapped on an outer circumferential surface of the stator core; and a first coil wound on one side of the stator core and a second coil wound on the other side of the stator core. The stator core includes: a lamination type core portion formed by laminating a plurality of iron pieces, on an outer surface of which a first press-fit groove is formed, and on an inner surface of which a second press-fit groove is formed; a first integration type core portion fixed to the first press-fit groove of the lamination type core portion, integrally formed by metal powders, and on which a first coil is wound; and a second integration type core portion fixed to the second press-fit groove of the lamination type core portion, integrally formed by metal powders, and on which a second coil is wound.

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Daegu, South Korea

Hak Rok Kim