Causes and Solutions of Motor Noise or Abnormal Acoustic Faults

Reason 1: the inner bearing clearance of electric bicycle is large

Treatment: replacement of bearings

Reason 2: motor rotor sweep

Treatment: repair of stator, fat tire electric bike and rotor

Reason 3: magnetic steel loosening

Treatment method: rebonded magnetic steel

Reason 4: motor body deflection

Treatment: readjusting the body

Reason 5: motor steering gear surface oxidation, ablation, oil pollution uneven, commutator loose

Processing method: cleaning the commutator surface or welded commutator

Reason 6: carbon brush loosened, carbon brush frame is not correct

Treatment: adjustment