Generally speaking, a vibration motor has a certain operating power, which is called the rated power, the unit is watts (W). If the actual motor power exceeds the rated power of the vibration motor in some cases, this phenomenon is called motor overload. The following is the reasons for the vibration motor overload. 1. Overload. 2. The voltage of the vibration motor is too high or too low. 3. The vibration motor is severely damp or corroded by corrosive gas for a long time, which reduces the insulation resistance. 4. The bearing of the vibration motor lacks of oil or is under dry grinding situation. Additionally, the rotor is mechanically misaligned, causing the motor current to exceed the rated value. 5. Failure of the mechanical transmission parts happens. 6. Analysis of other causes of vibration motor overload. The terminal voltage is too low. This voltage refers to the voltage measured at the lead end of the motor stator when the vibrating motor is starting or running at full load,...