What is the reason why the electric fan does not turn when it is turned by hand, and how should it b

The overhaul can be used in the following ways:

First of all, turn the motor shaft or fan blade by hand without power to see if the rotation is flexible? If there is resistance to rotation, it means that the motor bearing is seriously worn or the lubricating oil is dry, and the new bearing should be replaced or lubricated to make it rotate flexibly without resistance. When installing the fixed motor, it is necessary to tighten the screws diagonally, and it must be tightened gradually, not in one step, and at the same time, it is necessary to hit the shaft back and forth with a wooden handle driver to ensure that the shaft is concentric with the bearings at both ends, so that the rotation will be flexible and without resistance after fastening.

If it turns flexibly without resistance, there are several reasons:

First, the capacitor is damaged, and a new capacitor of the same capacity should be replaced.

The second is that there is an inter-turn short-circuit fault in the coil, and the resistance value of the running winding and the starting winding can be measured with a multimeter to judge the quality of the winding. If the resistance value is not normal, it is better to use the new motor.

The electric fan does not rotate, you need to push it by hand to rotate, in this case, the capacitor is aging, and you need to replace it with a new capacitor of the same model. Lubricating oil should also be considered.

Hello:Electrical faults]: Ordinary electric fans areCapacitive split-phase motors, start the capacitorDisfigurementThis will happen, and if you flip the fan in the opposite direction, it will be reversed.

Mechanical failureWhen the bearing is short of oil, such a phenomenon will also occur, and lubricating oil can be added.

3. The fan uses [Oil-impregnated bearingsFilling with lubricating oil can solve the problemNever rub with metallographic sandpaperDon't make ultra-low-level mistakes.

The electric fan will start to rotate only when it is toggled, generally the shaft and bearing of the motor are used for a long time, and the heating and ablation lead to tight fit and lack of lubrication.

If the electric fan does not rotate and has to be dialed with one hand before turning, it is because his circuit is aging, and then the power becomes smaller, so it is necessary to change a new circuit or a new fan.

Even if the electric fan does not rotate, you can't flip it by hand, because it is very dangerous, and the reason why the electric fan does not rotate is that the motor coil inside is broken. So the only way to get it repaired or to buy a new one.

The efficiency of the motor is not enough, and it should be good to change to a motor.

If the electric fan does not turn, what is the reason why it will turn when you dial it by hand, how to deal with it, and you need to replace the starting capacitor.

A decrease in capacitor capacity and a lack of oil in the fan shaft are all possible.

In this case, the capacitor should be broken, and I really help you look forward to it

The electric fan can't start, so there are several reasons why you need to turn it with your hands:

1.If the capacitance decreases, replace the capacitor with a new capacitor of the same capacitance.

2.The motor bearing is dry, rusty and worn, and should be cleaned and filled with lubricating grease.

3.The power supply voltage is too low.

4.If there is an inter-turn short circuit fault in the motor coil, the coil should be rewound or replaced with a new motor.

What is the reason why the electric fan does not turn?

1.The priority is that the motor lubrication is not good, after disconnecting the power supply, you gently dial the fan blade, and find that the rotation is a little stiff, indicating that the oil is gone, and the shaft part should be lubricated with oil, and the rotation is very easy, indicating that the lubrication is good.

2.You have to consider how long the electric fan has been used, the motor will wear out, and the bushing of the motor will easily burn out after wearing. If the motor is used for a long time, the internal resistance of the motor will also become larger, and the load capacity will be lower, resulting in the inability to drive the fan blade to rotate.

3.The overheating of the motor will also cause the load capacity of the motor to deteriorate, and the active power of the motor will become low, resulting in the inability to drive the load.

4.From the inside of the motor, it has a protection device inside, and there is an overheating circuit breaker, that is, the coil winding part is short-circuited, resulting in a sharp increase in heat generation and a broken circuit breaker.

5.Another is that the starting capacitor capacity becomes smaller, although those parameters are written on the nameplate, but after a long time, the capacitance capacity will decrease, resulting in the starting torque of the motor becoming smaller, unable to drive the load. This is simple, remove this capacitor, and then replace it with a new one, and the same model should be fine.

But it's better to change to a 20% larger one than the original, and you will get better results.

6.Excessive axial clearance of the motor's rotating shaft can also cause the load to be unable to be dragged away. If the motor is disassembled, the axial clearance of the shaft is too large, and it should be adjusted by adjusting the gasket.

In the first case, there may be a problem with the starting capacitor of the electric fan, and its capacity is not enough to supply the electric fan normally to start. In this case, you should consider replacing a starting capacitor and give it a try.

The second case is that the rotor bearings of the electric fan are corroded. Therefore, the resistance to the rotation of the electric fan is quite large, and it cannot be started. You can use sewing oil to drip two drops on the bayonet of the bearing, and then do not plug in the power supply, use your hands to dial the fan blades, rotate for a few weeks, and after the electric fan is loose, you can turn on the button when the power is on, and you can start.

The electric fan uses 220 volt household single-phase alternating current, and its stator coil is different from that of an AC asynchronous motor, and the way of generating a rotating magnetic field is also different. The problem is on the starting capacitor, if the capacitor wiring is not disconnected, it must be the capacitor failure and damage, Hua Yuan went to the electronic component store to buy a product of the same product and replace it.

In this case, there may be two reasons, the first is that the capacitor is broken, and the second reason is that the shaft of the motor is worn, or there is a lack of lubricating oil.

Disconnect the power supply and gently turn the blades. If there is resistance, it is a lack of oil. If you don't feel much resistance, the capacitor is broken, and you can replace it with a capacitor.

Thank you for your question. Hope.

There may be a lack of lubricating oil, the initial resistance is large, and after adding an external force fan to rotate, it will rotate continuously by inertia and electric power.

It shows that it is not a circuit problem, but a mechanical aging that hinders the rotation of the fan blades.

In this case, the capacitor should be broken, and I really help you look forward to it

There are several reasons why the electric fan does not turn:

1. The fan shaft part should ensure that there is lubricating oil, otherwise the fan blade cannot be dragged by the motive on it. You can choose to turn off the power and then toggle the fan blades, if the rotation is stiff, there is basically no lubrication.

2. 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.

3. 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.

4. In many cases, the reason why the fan blades do not rotate is the problem of 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.

5. 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 if it is worn out.

6. 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.

7. If the axial clearance of the rotating shaft is too large, you can choose to adjust the gasket after disassembling the motor. When installing the motor back, it should be noted that the rotor must be concentric with the bearing, slowly tighten the lubricating screw diagonally, and finally knock the shaft with a wooden handle to ensure that it is concentric.

8. If it is due to electrical faults, you can check the wiring lines, sometimes the wires are damaged, etc., and the problem can be repaired.

When our electric fan cannot be turned on, but it can be turned up by hand or chopsticks, we should first remove the fan cover. In general, only one screw is fixed by a plastic fastening ring with double slots, and the hooded screw can be easily removed by loosening the capped screw a few times, which is very simple.

The electric fan doesn't turn, so you can turn it with your hand. This is because the power of the motor is unbalanced, that is to say, the capacitor is broken, the three-phase electricity is unstable, and it will be repaired if you replace it with a capacitor of the same model.

1.The capacitor of the electric fan is deteriorating, and the same specification can be replaced.

2.If there is a shortage of oil, the sewing machine lubricating oil can be filled into the felt of the "oil-impregnated bearing" of the electric fan.

3.When the "dead center" is activated, the motor structure is deformed, resulting in an uneven air gap between the stator and rotor. When the motor is powered on, use a wooden stick to gently tap the output shaft of the motor radially until the "dead center disappears".

The electric fan will only turn when you dial it by hand, and the capacity of the starting capacitor will generally decrease.

The fan will turn without turning and unplugging, and in most cases the capacitor will be damaged. Handle and replace the boot computer capacity.

There are many reasons why the fan does not rotate, in most cases, I feel that it should be the problem of the engine, that is, the small generator inside, he lost power at this time, in this case, you can only operate by hand, but if you operate it by hand, its power is also insufficient, you can confirm that it is the reason for this, you can only know what we call the repair department to repair.

Hello:Judging from your description, it should be the lack of lubrication in the fan bearing, just take it apart and add some butter to lubricate it.

The electric fan can't move, there is no wind at all, the old electrician teaches you easy maintenance step by step, practical electrician technology!

It should be a local short circuit in the internal windings of the motor, and the deviation of the shaft is caused by the uneven distribution of magnetic force, resulting in greater friction and inability to vibrate

1.There is too much sludge in the bearing, which makes it difficult to start! - Oiled after cleaning!

2.Capacitor capacity becomes smaller, making it difficult to start! - Replace!

The above two items account for 80-90% of the failure rate!

3.There is a short circuit inside the motor! - Replace!

It may be a problem with the shaft, and it should be fine to wipe it with a little lubricating fluid.

Household electric fans are all single-phase motors.

Its start-up requires an auxiliary coil connected by a start-up capacitor.

The purpose of this auxiliary coil is to help create a rotating magnetic field when the switch is turned on, allowing the motor to start turning. Once the motor turns, this auxiliary coil is useless.

The electric fan cannot be turned on by turning on the switch, but it can be turned with a pinch of the hand. It means that the main coil of the motor is not damaged, but the starting capacitor is damaged, and the auxiliary coil does not work and cannot form a rotating magnetic field, so the motor cannot rotate after the switch is turned on. However, if you turn it by hand (equivalent to the activation of the auxiliary coil), it will work normally.

This should be caused by a decrease in capacitance capacity, or by severe wear of the motor bearings or dry lubricating oil.

Check to see if the shaft is sluggish because it is dirty, if it is not the cause of the motor coil or start-up problem.

This is how a damaged starter capacitor manifests.

If the electric fan cannot operate normally after being turned on, you need to turn the fan blades by hand to rotate, and the common reasons are as follows:

1. Under normal circumstances, the capacitor is damaged, when the electric fan is used for a long time, the capacitor capacity will be reduced, resulting in the starting torque of the motor becoming smaller, unable to drive the load, and a new capacitor needs to be replaced, it is recommended to choose a capacitor that is 20% larger than the original capacitor, which will have a better rotation effect.

2. It may be that the motor auxiliary winding is broken, resulting in the inability to turn up, and the line needs to be repaired.

3. If you feel stiff and resistant when you dial the fan blade, it may be that the shaft sleeve is worn or there is a lack of oil, disassemble the fan, check whether the bearing parts are damaged, replace it, and drip some lubricating oil on the shaft.

4. It may be the reason that the axial clearance of the shaft is too large, you can choose to adjust the gasket after disassembling the motor, when installing the motor back, it should be noted that the rotor must be concentric with the bearing, and the lubrication screw is slowly twisted diagonally, and finally the shaft is knocked with a wooden handle to ensure that it is concentric.

The electric fan does not rotate, it will only turn when you dial it by hand, this phenomenon can be diagnosed as the fan starting capacitor is broken, and it can be normal to replace the capacitor with a capacitor with the fan capacitor.

If you want to turn it by hand, it means that the motor is no problem, and it should be that the starting capacitor is broken, and you can replace it with a capacitor of the same model.

The electric fan does not rotate, and it will only turn when you dial it by hand, which may be a problem with the capacitance. Remove the old capacitor, buy a new one according to the above model, and replace it later. Let's see if it's getting better, and if not, it's a problem with the motor.

It may be that the part is loose, so you have to dial it by hand before it turns, you can check the fan, and then re-tighten the screws on the fan.

If you pull the tongdian and can keep turning, there is no big problem, if you pull it by hand, turn it and stop, it may be that the motor of the electric fan is broken and needs to be checked and repaired.