How to repair the electric fan motor is broken? The fan motor is broken, what should I do?

Common faults of electric fans and their solutions. The main reasons why the motor does not rotate are: open winding, lack of oil, shaft holding, abnormal capacitance, etc.

Judging from the maintenance practice of electric fans, the latter two types of faults are the majority. For electric fans that do not rotate, my repair steps are: plug test, rotating motor, capacitance test, and reprocessing.

The first step is to measure the operation of the electric fan and the speed regulating windings. Turn the timer of the electric fan first. When you hear a click, the timer is normal.

If there is no ticking sound, the timer is damaged. If there is no resistance value, it is possible that the motor windings are burned out. For motors with thermal fuses in series, it may be that the thermal fuse is on, and the motor should be disassembled to see.

If it is only an open circuit, the short circuit of the hot fuse can return to normal. All gear switches are broken, but not very likely. Step 2:

Check whether the shaft is locked, remove the cover of the electric fan, and turn the motor shaft by hand. If it can't turn, it means that the motor is seriously locked. To disassemble the motor, first remove the oil and rust on the front and rear axle sleeves and motor shafts, and then add enough sewing machine oil to the linoleum of the front and rear axle sleeves.

Most electric fans can be troubleshooting. Step 3: Measure the start-up capacitance.

If the motor shaft rotates flexibly, the starting capacitance of the electric fan motor needs to be measured. First, use a multimeter R 100 to measure the resistance value at both ends of the starting capacitor of the motor and the resistance value of the running, starting and speed regulating windings of the entire electric fan motor, that is, the resistance value of the black and yellow leads. Maintenance of active electric fans As for the electric fans that are operated by the motors, I have done it in one step according to the actual situation.

Instead of doing the maintenance step by step as mentioned above. If the user says, the electric fan first turns slowly and then gradually gets faster. As a rule of thumb, it is generally the motor that holds the shaft slightly.

The reason for this is that the electric fan initially lacked lubricating oil. Directly disassemble the electric fan motor and add enough sewing machine oil to the linoleum of the front and rear axle sleeves, which can generally be repaired.

It can only be repaired.

Motor. Place up, you take the motor apart if you see inside.

Thermal switch. Then replace a thermal switch again, or short-circuit the two wires of the thermal switch. Generally fine after a short circuit, but there is no guarantee that the motor will burn out when it overheats.

1. How to repair the fan motor when it burns

1. The coil burns out. Take the ordinary moving head fan as an example, to the 5 lines of the motor, there are 100 to 300 ohms of resistance between the two lines, especially the connection at both ends of the capacitor, there must be resistance in the measurement, and sometimes one less of the three gear lines can be used with resistance, and one less gear is only. Now it's time to replace the coil.

2. The capacitor burns out. The capacitor is generally, sometimes it is broken and there is no suitable size, you can use two or three series of large capacitors, such as 5UF capacitors, two in series, three in series, the capacitance should not be increased, it must be increased to turn the motor must have a short circuit between turns, if so, it must be replaced with a new one.

Second, the judgment method of the fan motor burned (universal meter judgment).

The motor of the electric fan has 5 lines. They are 1 gear, 2 gear, 3 gears, and 2 capacitor wires. Generally speaking, except for individual motors, the wire colors of the 3 gears are red, blue, and green, and the capacitors are black and yellow.

Detach all 5 wires of the motor. First of all, adjust the gear of the multimeter to the European mother gear, the red watch pen is connected to any capacitive line, and the black watch pen is connected to the first gear.

Write down the resistance first, and then measure the 2nd and 3rd gears, normally speaking, the larger the measured gear, the greater the resistance between the capacitor line and the capacitor line. That is to say, if the resistance value of the above three gears is infinity, or a certain gear is infinite, it means that the motor coil is burned or the coil of a certain gear is broken. Finally, measure the 5 wires and the motor housing, that is, whether there is a short circuit in the ground.

For products like electric fans, it is recommended to send them directly for repair.

If it is no longer under warranty, you can take it to a general repair shop for repair.

It is not recommended to disassemble it by yourself, although it is not a very complicated product, but it is still very easy to disassemble.

Is the terminal inside the motor, or plugged into the circuit board? I suspected that the wires in the motor were broken, so I pulled each wire hard, but I didn't pull it down, and I also dragged it at the end of the circuit board, but I didn't pull it down. Now it's time to dismantle the motor...

During the power-on experiment, the fan blades can be rotated without a sense of resistance, and the rotation is very easy, but the rotation speed is very slow, and it is still the same to replace the new capacitor. If you suspect that the starting winding is open, can you disassemble and repair it? If it is replaced, where is it usually sold?

Turn on the motor, there is an overheating protector inside, and see if the coil is broken or the overheating protector is broken.

Start by removing the old electric fan motor. Take the grille, the blades.

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The original motor dimensions are then measured. Including, motor shaft diameter, blade mounting hole to screw length, overall shaft length. Motor support rod diameter and height. There is also the size of the screw mounting position on the front of the motor.

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Then buy the motor, write down the above data, refer to the product specifications, and buy the product.

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Generally, the electric fan motor has a detailed introduction, the color and number of output lines.

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Install the motor head, and then connect the motor cable to the corresponding position of the button.

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An appropriate amount of lubricating oil for sewing machine oil or electric hair clippers with low consistency can greatly alleviate the lack of oil, while the swing head gear train directly connected to the rear of the motor can be applied with light sticky oil.

Common faults. The fan shaft part is to ensure that there is lubricating oil, otherwise the fan blade on the motive cannot be dragged. If you are at home, you can choose to turn off the power and then turn the blade letter crack, if the rotation is stiff, there is basically no lubricating oil.

Wear and tear caused by a long period of use. If a fan is used for a long time, the motor will wear out, and the shaft sleeve of the motor will easily burn out after wearing.

The fan does not rotate due to overheating. There is a motor in the fan device, and there will be an overheating circuit breaker in the motor, if there is a short circuit in the coil winding, the heat will increase in a short time, and the motor will "strike" in this case.

The capacitance of the starting capacitor is reduced. When the fan is used for a long time, the capacitance capacity will decrease, resulting in the starting torque of the motor becoming smaller, and the load cannot be driven.

In many cases, the reason why the fan blades do not rotate is poor maintenance. If the blade is stiff after turning off the power, you should use some lubricating oil to drip into the shaft so that it can be lubricated so as not to affect the motor to drag the blade.

For the fan blades caused by wear and tear do not rotate, the easiest thing is to replace the parts, especially the shaft sleeve, which is easy to burn off after wear.

If the capacitor capacity becomes smaller and the fan does not rotate, you can remove the capacitor and replace it with a new capacitor of the same model, it is recommended to choose a capacitor that is 20% larger than the original capacitor, which will have a better rotation effect.

If the axial clearance of the shaft is too large, you can choose to adjust the gasket after disassembling the motor. However, remember that when installing the motor back to slip and close, it should be noted that the rotor must be concentric with the bearing, and the lubrication screws should be slowly tightened diagonally, and finally the shaft should be knocked with a wooden handle to ensure that it is concentric.

If it is due to an electrical fault, you can check the wiring of each wiring, and sometimes if the wiring is damaged, you can repair the problem.

The reasons why the electric fan does not rotate when plugged in: the motor coil is broken, the internal power is not energized, the starting capacitor fails, and the bearing lacks oil. Collapse and combustion.

The reason why the electric fan does not rotate when plugged in:

1) The motor coil is broken.

The coil of the fan motor burned out, resulting in the failure to operate normally.

2) There is no power on the inside.

The wiring of the fan switch and timer is disconnected, causing the fan to not be powered on normally.

3) The starting capacitor fails.

The capacity of the starting capacitor decreases, resulting in the inability to start the motor normally.

4) Lack of oil in bearings.

The lack of lubricating oil in the bearings of the fan telecommunications ballast makes it difficult for the fan blades to rotate.

1. Unplug the relevant power supply safely. Then remove the fan blade guard.

2. Gently push the fan blade of the electric fan with your hand, and feel whether the fan blade is tight in the process of pushing. It can be repaired according to the tightness or tightness of the fan blades.

3. If the fan blades are tight, it is because the lubricating butter in the motor has been ground dry. You can disassemble the motor and add the butter correctly.

4. If the fan blades are not tight, it is because the starting capacitor next to the motor has been aged, and it can be replaced.

Hello for reference only, I hope to help you, the design of the old electric fan is relatively simple, so it is not complicated to repair: 1, turn on the fan does not turn, if you toggle the fan blades, the motor can start normally, this situation is generally a starting capacitance problem, you need to replace the capacitor of the same specification. If there is resistance to turning the fan blade by hand without power, this situation means that the motor shaft sleeve is short of oil and needs to be refueled.

2. If you can feel a slight vibration on the motor when you turn on the fan, it proves that the internal circuit of the fan is normal, and the maintenance refers to step 1. If there is no slight vibration when the machine is turned on, check the power cord, and then check the internal timer and gear switch. 3. Turn on the fan, if the fan can be started with the help of external force, the starting capacitor is still not able to start normally, it is generally a motor problem, most of the motors that come with the electric fan on the market are aluminum coils inside, and the copper power cord of the aluminum coil and the motor will be oxidized after a long contact time, so the resistance value will become larger, so it still can't start by itself after changing the capacitor.

Can I still help you?