LG WM3677HW Owner's Manual page 93

Repair – Motor
The direct drive motor is a brushless DC motor built on the
shaft of the drum. The elimination of belts and pulleys allows
greater efficiency and reliability with less noise and vibration.
The use of direct current allows the MICOM to control both
the speed and the direction of rotation. There are no brushes
to wear away as in a conventional electric motor. Unlike a
more traditional brushless motor, the Direct Drive's rotor
surrounds the stator rather than being attached to it.
A Hall sensor reports the motor's speed to the MICOM.
WM3677HW
(see chart, next slide)
p42