If the electric fan at home does not rotate, how to tell whether the starting coil of the motor is b

1. The priority is that the motor lubrication is not good, the shaft part should be lubricated with oil, I was in this situation yesterday, the fan blade is installed on the motor can not be dragged, and after I remove it, the shaft can still operate normally, which shows that the motor is not broken.

2. 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. 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 the circuit breaker is broken.

3. If a fan is used for a long time, the motor will be lost, and the shaft sleeve of the motor will be easily burned out after wearing. Moreover, at this time, the internal resistance of the motor also becomes larger, the load capacity becomes lower, and the fan blades are easy to rotate. Long-term wear can also make the gap between the shafts too large, preventing the blades from turning.

Electric fan: Electric fan, also known as fan or fan, is a household appliance that uses a motor to drive the fan blades to rotate to accelerate air circulation, mainly used to cool off the heat and circulate air. It is widely used in homes, classrooms, offices, shops, hospitals and hotels.

The electric fan is mainly composed of parts such as a fan head, fan blades, a grille and a control device. The fan head includes an electric motor, front and rear end covers, and a moving head air supply mechanism. The main components of an electric fan are:

AC motors. Its working principle is that the energized coil rotates under force in a magnetic field.

Electrical energy is converted into mechanical energy, and at the same time, due to the resistance of the coil, it is inevitable that some of the electrical energy will be converted into thermal energy. Common household fans are essentially axial fans, i.e., the direction of the wind is parallel to the axis of rotation of the fan blades.

If the starting capacitor is broken, you can hear a slight humming sound when you start the machine, that is, it does not rotate, and the shaft of the electric fan is also like this sound when there is a lack of oil, and when you are not plugged in, turn the fan blade by hand to see if it is normal, if the rotation is normal, the starting capacitor is generally broken, and the coil is relatively less broken 1

Plug in the power supply, turn on the electric fan and do not rotate, but the motor has a [humming] sound, which is a typical symptom of bad capacitor, just replace the capacitor with a new one. If the fan rotates, but it rotates very slowly, this is the lack of oil in the motor bearing, and the fan can be disassembled and oil at both ends of the motor bearing.

If the motor does not rotate when turned on, there is smoke, or there is a bad smell, this is because the motor has burned the coil, and you can only replace it with an electric fan.

Directly use a new capacitor of the same type to connect in parallel at both ends of the original capacitor to see if the electric fan rotates (this step is to check whether the fan capacitor is invalid and the capacity is small, so connect a capacitor in parallel; If the fan is normal, it means that the capacitor failure capacity of the original electric fan is small, you can erase it and install a new capacitor at the same time. Of course, if you can use a "multimeter" to measure, you will quickly find out whether the capacitor is leaking and the capacity is small. ）

Use the "multimeter" resistor r 100 gear, first test the motor wires at both ends of the capacitor to see if the "multimeter" has an indication, that is, check: whether the total coil of the motor is on, if not; The explanation is that the motor is broken (the coil copper wire is burned); If it is turned on but still does not turn, it is necessary to further test the rest of the wires to see if the motor has a local short circuit (the specific method is a bit troublesome, and it will confuse you; You only need to go through the first two steps of detection, if the fan does not rotate, it must be the motor is broken);

1-First of all, the capacitance level of the digital multimeter measures whether the capacitance is a problem (capacitance damage and disability are common), and the result is twice the result with half the effort.

2-Use a shake meter and a multimeter to measure the resistance of the coil, whether the insulation between the coil and the ground (iron core) is qualified, whether the leakage is or not, and draw the conclusion that the fault between the coils and the ground is leakage.

Note: The leakage resistance value measured with a multimeter is not at a certain voltage.

If the fan does not rotate, the capacitor may be broken. If the capacitance of the electric fan is broken, the most direct manifestation is that the electric fan does not rotate, or it needs to artificially toggle its fan blades to be able to rotate, which is mainly because its motor bearing is too stuck and still does not rotate after being connected to the power supply, or it rotates relatively slowly, which means that the capacitor has been damaged.

The electric fan capacitor has the characteristics of good stability, impulse current resistance, strong overload capacity, low loss, high insulation resistance, long rated working life, excellent self-healing performance, safe and reliable filling of built-in flame retardant epoxy resin, non-toxic and non-leakage capacitor and liquid materials, which is conducive to environmental protection.

Power Saving Methods for Electric Fans:

First of all, when purchasing, you should choose high-quality products. Due to the low technical threshold of the fan industry and the uneven products on the market, it is necessary to choose products from well-known brands, so as to ensure the quality.

Secondly, because the electric fan can directly convert the electrical energy into kinetic energy, the power consumption is very low, the maximum power is only 60W, which is equivalent to the electricity consumed by the table lamp for ordinary lighting, so from the perspective of energy saving, the use of electric fans in the middle of summer is undoubtedly the best choice. And use the electric fan with the air conditioner, and set the air conditioner temperature at 26 28, which will save electricity and money.

If the electric fan doesn't rotate, is the capacitor broken? The old electrician made a move, and he knew it when he tested the good or bad.

Not necessarily, it could be something stuck in it.

1. The function of the capacitor is to connect the capacitor in series in the secondary winding, so that the secondary winding and the main winding form a 90 degree electric angle, generate a rotating magnetic field, and the fan will rotate normally. This capacitor is called the running capacitor, and the fan motor is called a single-phase capacitor motor.

2. There are two situations when the capacitor is damaged: the capacity is reduced or discapacitated, at this time, the fan will not start and run by itself, and it can be rotated with the help of external force, but the speed is lower than the normal speed; In this case, even if external force is added, the fan cannot be kept rotating.

3. The function of the capacitor is to make the secondary winding and the main winding form a 90 degree electric angle and produce a rotating magnetic field, its capacity is very critical, the capacitor of the same specification must be used when replacing the new capacitor, the capacity is larger than the original, or small is not good, it will deviate from the 90 degree electric angle, affecting the speed of the fan.

Try another one, generally the coil will not burn.

Remember to adopt it.

The starting capacitor of the Midea electric fan is broken, and a slight humming sound can be heard when the boot is turned onIt just doesn't turn, the shaft of the electric fan is short of oil, and it is also such a sound, when it is not plugged in, turn the fan blade by hand to see if it is normal, if the rotation is normal, it is generally the rubber capacitor that is broken, and the coil is relatively less broken.

The way to detect that the motor inside the American electric fan is broken is:

1. Check whether the power cord is energized first, if the power is energized and the motor does not rotate, the motor has the possibility of breakage.

2. Twist the rotor shaft of the motor by hand to see if it is active, if it is normal activity, and the motor is energized and does not rotate, the motor has the possibility of breakage.

3. Use a multimeter to measure the timer and gear.

What's going on with the electric fan not turning.

If the fan doesn't rotate, don't easily judge that the motor is broken, in fact, it won't rotate if it's broken.

Lack of lubrication, resistance and noise of the bearings. Electric fans need to be maintained frequently. Otherwise, it will squeak, rust, wear out the bearings and even damage the motor.

Most of the well-known electric fan factories such as Beriaco use fully synthetic electric fan lubricants from Hotolube or Kluber. Fully synthetic base oil production, clear and transparent, colorless and odorless, low temperature resistance, no dust. Tao Feng has a 120ml white sharp mouth small oil bottle, just drop a few drops, easy to use.

It is not suitable to use ordinary engine oil and butter, which volatilize quickly in summer and will have an unhealthy smell.

The electric fan motor is a single-phase motor, and there are two sets of coils in the single-phase motor, and the parameters of these two sets of coils are basically the same. The circuit diagram is as follows:

First measure whether the resistance value of these two groups of coils 4 is the same, the error difference is not large, if the difference is very large, then, the winding with small resistance value, there may be an inter-turn short circuit phenomenon inside, indicating that the motor has been broken.

If the two groups of resistance are the same, it may be that the rotor and stator are not concentrified when the motor is assembled, and the resistance is too great, so it is recommended to gently tap the two ends of the motor with a hammer to make it rotate freely.

Then the motor bearing is seriously worn, especially the radial clearance is too large, after the power is energized, under the action of electromagnetism, the rotor and stator attract each other and get stuck, and only the buzzing sound can be heard.

There is no problem with the electric fan to check the circuit, and it is good to check the capacitance, but it does not turn. I think it may be that the coil of the motor burned out. Some electric fans have very thin motor wires, as thin as hair, and may have burned out.

This car has no problem checking the circuit, and it is good to check the capacitor, but it does not rotate, and I think it is very likely that there is a problem with this engine, so it is possible that he has no way to advertise it.

Electric fans are generally equipped with starting capacitors, when the electric fan is powered, if you give a forward rotation force by hand, the fan will automatically rotate, which means that the starting capacitor needs to be replaced, otherwise it is necessary to check whether there is an inter-turn short circuit inside the electric fan coil.

In this case, the motor is broken, and I am really helping you look forward to it.

Summary. There is no problem with the electric fan, capacitor and wiring, but what is the reason for not turning, pro! Hello, happy to answer your <>

There are two reasons why the capacitor is good and energized, one is that it is blocked and stuck, and the other is that if the motor has a buzzing sound and does not rotate, there is a broken wire inside the motor, and a group of broken wires in the two windings. There is no buzz that the common line is broken. Hope mine can help you <>

Do you have any other questions?

There is no problem with the electric fan, capacitor and wiring, but what is the reason for not turning?

There is no problem with the electric fan, capacitor and wiring, but what is the reason for not turning, pro! Hello, happy to answer your <>

There are two reasons why the capacitor is good and energized, one is that it is blocked and stuck, and the other is that if the motor has a buzzing sound and does not rotate, there is a broken wire inside the motor, and a group of broken wires in the two windings. There is no buzz that the common line is broken. Hope mine can help you <>

Do you have any other questions?

When the power is turned on, I obviously hear a little sound in the motor, and then there is no movement.

The first is that the rotor of the motor is inflexible and stuck, and the second is that the starting capacitor fails or the starting winding is open. First of all, eliminate the first fault, turn the rotor of the motor by hand to see if it can rotate flexibly without power, and if the rotor is very flexible, measure the starting winding of the motor or replace the capacitor.

If there is a problem with the starting winding, I start it with my hand and there is no response, and the blades are very flexible.

The pro-start winding is not connected by the following two reasons, one is the opening of the starting winding Shao coil caused by the opening of the Qibao line, so that the motor can not be used normally, and the coil needs to be rewound. The second kind of single-phase motor starting winding is connected in series with a starting capacitor, and the capacitor is burned out, which will also cause the failure of the single-phase motor starting winding.

If there is a problem with the starting winding, I can start it manually.

Dear, there is a set of broken wires in the two windings. There is no buzz that the common line is broken.