WT-W7111TH - LG Washing Machine Service Manual (repair manual). Page 7

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6
Structure of BLDC motor
WORKING PRINCIPLE
The rpm of motor controls by PWM (Pulse Width Modulation).
RIPPLE OF PWM
(LOW rpm)
The width is narrow.
(Low speed rotation)
The width is wide.
(High speed rotation)
RIPPLE OF PWM
(HIGH rpm)
COIL
MAGNET
fi›»
HALL SENSOR 
ASSEMBLY
STATOR
ROTOR
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