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How to repair the electric fan if it fails | 9 inch table fan
1. Trouble phenomenon: Insert the power cord plug of the electric fan into the electric socket, turn the timer rotary button to the "on" position, and press the key speed control switch button. If the fan blades of the electric fan do not rotate at this time, but there is a "humming" noise inside, we say that the electric fan has a motor stall failure.
2. Failure analysis: the electric fan emits a "buzzing" sound, indicating that the motor has been energized. However, the fan blades of the electric fan do not rotate due to two reasons: the motor load is too large or the motor starting torque is too low. Under normal circumstances, the mechanical deformation of the rotating mechanism and the sintering of the bearing lubricating oil may cause the motor to be too loaded; the power supply voltage is too low, the starting capacitor capacity is small, etc. will cause the motor to start torque is too small.
3. Failure repair Taiwan fan motor locked-rotor failure maintenance process
1. Check the rotation flexibility of the motor main shaft: remove the net cover, fan blades and other parts of the table fan, and rotate the shaft of the motor by hand. If the resistance is too large and the rotation is not flexible, it can be judged as a mechanical failure. At this time, the motor needs to be re-assembled and disassembled. During the assembly process, carefully observe the wear of the bearing, the fit of the stator and the rotor, the cleanliness of the bearing lubricant, etc., and take appropriate measures, such as replacing the bearing, adjusting the stator and rotor The clearance of the fit, cleaning the motor bearings, etc.
2. Check the mains voltage: when the mains voltage is lower than 180V, it will be difficult to start the motor.
3. Check the capacitor: After the motor is blocked, rotate the main shaft by hand. If the motor can run normally, it indicates that the fault is due to insufficient motor starting torque: if the mains voltage is normal, the cause of the fault is that the capacitance of the starting capacitor is too small. Because it is difficult to measure the capacitance of the starting capacitor with an ordinary multimeter, the capacitor can be directly replaced at this time, and the component replacement method can be used for repair.
4. Acceptance of the whole machine: re-install the table fan, power on and run, and check whether the fault is eliminated.
9 inch table fan
2. Failure analysis: the electric fan emits a "buzzing" sound, indicating that the motor has been energized. However, the fan blades of the electric fan do not rotate due to two reasons: the motor load is too large or the motor starting torque is too low. Under normal circumstances, the mechanical deformation of the rotating mechanism and the sintering of the bearing lubricating oil may cause the motor to be too loaded; the power supply voltage is too low, the starting capacitor capacity is small, etc. will cause the motor to start torque is too small.
3. Failure repair Taiwan fan motor locked-rotor failure maintenance process
1. Check the rotation flexibility of the motor main shaft: remove the net cover, fan blades and other parts of the table fan, and rotate the shaft of the motor by hand. If the resistance is too large and the rotation is not flexible, it can be judged as a mechanical failure. At this time, the motor needs to be re-assembled and disassembled. During the assembly process, carefully observe the wear of the bearing, the fit of the stator and the rotor, the cleanliness of the bearing lubricant, etc., and take appropriate measures, such as replacing the bearing, adjusting the stator and rotor The clearance of the fit, cleaning the motor bearings, etc.
2. Check the mains voltage: when the mains voltage is lower than 180V, it will be difficult to start the motor.
3. Check the capacitor: After the motor is blocked, rotate the main shaft by hand. If the motor can run normally, it indicates that the fault is due to insufficient motor starting torque: if the mains voltage is normal, the cause of the fault is that the capacitance of the starting capacitor is too small. Because it is difficult to measure the capacitance of the starting capacitor with an ordinary multimeter, the capacitor can be directly replaced at this time, and the component replacement method can be used for repair.
4. Acceptance of the whole machine: re-install the table fan, power on and run, and check whether the fault is eliminated.
9 inch table fan