Washing machine to produce three-dimensional motion

摘要

A washing machine includes a main body defining an outer appearance, a tub disposed within the main body, a main drum rotatably mounted in the tub, a sub drum mounted in the main drum to be relatively rotatable with respect to the main drum, an outer shaft for rotating the main drum, an inner shaft for rotating the sub drum, being disposed inside the outer shaft, and a driving motor having a stator, an outer rotor connected to the inner shaft that is rotatable outside the stator, and an inner rotor connected to the outer shaft that is rotatable inside the stator, wherein the driving motor independently drives the main drum and the sub drum.

主权项

1. A washing machine comprising:
a cabinet defining an outer appearance of the washing machine; a tub disposed within the cabinet; a main drum rotatably mounted in the tub; a sub drum mounted in the main drum and configured to rotate with respect to the main drum; an outer shaft configured to rotate the main drum; an inner shaft configured to rotate the sub drum, the inner shaft being disposed inside the outer shaft; a driving motor having a stator, an outer rotor connected to the inner shaft and rotatable outside the stator, and an inner rotor connected to the outer shaft and rotatable inside the stator; and a controller configured to control operation of the outer rotor and the inner rotor, wherein the controller is configured to drive the inner rotor and the outer rotor at particular rotations per minute (RPMs), respectively, and send a braking command to the inner rotor and the outer rotor, and wherein the controller is configured to detect a first laundry amount inside the main drum and a second laundry amount inside the sub drum based on respective braking times of the inner and outer rotors.