What should I do if the CPU fan is reversed? What s going on with the fan reversal

I sell fans, and the fans are originally blown heat sinks, so there is no problem. If it's too hot, consider whether the contact is not good, and wipe the contact between the chip and the heat sink clean. Try it with some silicone grease. It should work well!

The fan is reversed, it is blown inward, so that the cooling effect is good.

Aren't you blowing a fan yourself?

There could be other reasons. It's right for the fan to blow backwards to you, and the wind blowing is bigger than the suction wind

Unplug the power supply from the fan and just turn the head and plug it in.

And will you install the fan upside down when you install it?

This is when the fan is fixed to the heat sink.

Again, you said that the heat dissipation was not good, did you lose the silicone when you wiped the fan??

The line of the fan plug into the motherboard is reversed, it's okay, it's just not cooling, hehe, it can't be turned on for a long time.

Let's get a new fan, ** not high, you can rest assured that you can use it.

The fan is not reversed, but the fan has been used for a long time and the speed has been reduced, resulting in poor heat dissipation!

Now the case fans are brushless, and the reverse fan will not turn...

You've plugged in the fan power supply backwards. Or it's a cheap garbage fan, which is reversed when it is produced, hehe. This is not unusual, but rare.

The fan cannot be reversed.

Only turn in one direction.

Turn the fan off in the other direction.

It's easy to do. You put the fan.

Reverse 180 degrees.

That's it! Thank you!

It can be reversed and will not be short-circuited.

How many revolutions does your fan have, the high speed and high power are buzzing, and the wind speed can be adjusted by the computer.

It is the wire of the fan motor starting winding that is reversed, just swap the two connectors of the starting winding. The main component of the electric fan is: AC motor.

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.

1. If the fan blades are incorrectly installed and cause reverse, the blades can be reinstalled correctly after inspection.

2. The wire of the starting winding of the fan motor is reversed, and the two joints of the starting winding can be reversed. There are two windings in the fan, one main winding and one secondary winding, the capacitor can change the magnetic field by degrees, so that the phase difference between the main winding and the secondary winding is 180 degrees, if the main winding lags behind the secondary winding 180 degrees, the motor will be reversed.

3. During maintenance, the stator is reversed after the motor is disassembled, which will cause the motor to reverse, and it can be reinstalled.

4. It may be the reversal caused by the motor breakage, and the motor needs to be replaced.

The fan usually rotates normally, but the later reversal is caused by a slight short circuit in the starting coil of the motor. Only the coil can be changed.

If it is an electric fan with a 220V power supply, it may be that the capacitor wire is connected to the motor lead wire and power cable incorrectly, resulting in reversal, which can be recovered by the elimination method. As long as this condition is met: two wires of the capacitor are connected to two of the three wires of the motor, and one of the extra motor wires and one of the capacitors is connected to the power cord respectively. If it's an electric fan with a 380v power supply, you just need to swap any two of the three power cords.

If the electric fan rotates in reverse, it may be that the wire of the starting winding of the fan motor is reversed, and the two joints of the starting winding can be replaced. The most important part of the fan operation is the bearing, and after a long time, there will be a lack of lubricating oil, so that noise will be generated when rotating at high speeds.

According to the structure of the motor, fans can be divided into: single-phase capacitive type, single-phase shaded pole type, three-phase induction type, DC and AC and DC dual-purpose series commutator electric fans. A fan is mainly composed of components such as a fan head, blades, grille, and controls.

The reversal of the electric fan may be due to the fact that the wiring is not connected, when the power supply is connected to the common end and the running end, the fan is rotated, and when the power supply is connected to the common end and the starting end, the fan is reversed.

Hello dear! We are glad to answer for you: the fan reversal can be operated in the following ways to deal with the kiss, you can switch the two joints of the fan starting winding to achieve the reversal of the forward and reverse rotation; There are two windings in the fan, one main winding and one secondary winding, the main winding plays a running role, and the secondary winding Shan Jing plays a starting auxiliary role.

The capacitance is a cover that changes the magnetic field by 180 degrees, so that the phase difference between the main winding and the secondary winding is 180 degrees. The main winding is 180 degrees ahead of the secondary winding, the motor is forward, and the main winding lags 180 degrees before the secondary winding, and the motor will be reversed; You can find a double control switch, the terminals at both ends are connected to one end of the main winding and one end of the secondary winding, and the center contact of the double control switch is connected to the power live wire.

The electric fan motor is a single-phase motor, and the single-phase motor has a starting capacitor, and the role of the starting capacitor makes the motor have a certain rotation torque when it starts, changing the direction of rotation of the motor. This fan of yours is reversed, this is very easy to do, the specific operation method is as follows: open the fan housing, find the capacitor, there is a 220 volt power cable, move this power cable (2), from this side of the capacitor to the other side (arrow pointed to 3).

Question 1: What should I do if the electric fan is reversed Please see the figure below: Adjust the wiring of the starting capacitor.

Problem 2: What should I do if the electric fan reverses There are two main points: 1. The electric fan is short-circuited between turns, and the main and auxiliary phases are out of phase. 2. The capacitor is connected to the wrong wire, and the direction of the rotating magnetic field is reversed. So the electric fan will be reversed.

Question 3: Hello, what should I do if the electric fan is reversed It may be caused by the misalignment of the internal wiring of your fan. There are excitation coils and phase-shifting capacitors in the fan, if the capacitor is damaged or the wiring error will cause the motor to not rotate or reverse, check it and correct it.

Question 4: What should I do if the 220V electric fan is reversed The above is not fully paired, the three-phase is right, and the single-phase is not fully paired, because the two coils of some single-phase motors are symmetrical, and this method can be used. Such as washing machine motors, but most of the single-phase motors of the two coils are asymmetrical, there are main and secondary points, you do this, the main and auxiliary coils are reversed, you can see that the rotation is very slow, but also burn the motor, the correct way is to find an electrician to disassemble the motor, the two ends of the auxiliary coil to turn around.

Question 5: What should I do if the electric fan is reversed? If so, it would be nice to switch the connector of two of the live wires and change the phase.

Question 6: What should I do if the household electric fan is reversed Please see the figure below: adjust the wiring of the starting capacitor.

Question 7: How to make the electric fan reverse The power cord is connected to the capacitor at one end, disconnect it here, and connect it to the other end of the capacitor.

The reversal of the electric fan is the wrong wire, the solution:

1. The single-phase motor has two sets of coils, one is a common end, one is the running end, and one is the starting end, and the capacitor is connected between the running end and the starting end.

When the power supply is connected to the common end and the running end, the motor rotates forward; When the power supply is connected to the common end and the starting end, the motor is reversed; Only a single-phase reversible motor with the same cross-sectional area of the running coil and the starting coil can be reversed, otherwise the reversal cannot carry the load.

2. The three-phase electric fan is reversed, and it can be solved by changing the phase sequence of the power supply.

Related instructions: In general, when the household electric fan is produced, the motor is only designed to rotate forward, and there is no forward and negative rotation, because the number of turns of the main winding and the auxiliary winding coil is different, and some wire diameters are also different, so the output power and speed of the positive and negative operation are also different.

The number of turns and wire diameter of the main and auxiliary windings of the forward and reverse motors are the same, so the output power and speed of the forward and reverse operation are also the same.

Problem 9: How to solve the reversal of the electric fan motor Then you mistakenly connected the wire end to the opposite when you connected the fuse, so that it will be reversed, and then turn the wire head over to connect it again.

On a hot summer night, when you turn on the fan under the fluorescent lamp, you will find that with the change of fan speed, the fan blades sometimes seem to be stationary, sometimes reversed, sometimes forward. What's going on?

As you know, the motion picture camera chronologically divides the process of continuous movement into still images and records them on film. Usually 24 frames per second. When projected at the same speed with a projector, people enjoy a realistic movie because of the visual persistence of the human eye.

Fluorescent lamps do not emit light continuously, but constantly flicker with the frequency of alternating current, intermittently illuminating objects. At present, the frequency of alternating current used in our country is 50 Hz, and the frequency of fluorescent lamps is twice as high, that is, there are 100 flashes per second. Since the visual duration of the human eye is about 1 20 seconds, this flicker is usually not perceived, but it is different for objects that are rotating at high speeds.

Since fluorescent lamps illuminate objects 100 times per second, the blades of the fan are always in the same position when the rotational speed of the fan reaches an integer multiple of 100 rad s. In this way, people feel that the fan is "stationary". In fact, the fan has three blades, so when the speed is an integer multiple of 100 3 rad s, you see a "stationary", when the speed is slightly lower, you see a slow "reversal", and when the speed is slightly higher, you see a slow "forward rotation".

Since this phenomenon is caused by the flickering of the light source at a certain frequency, it is called the strobe phenomenon. In movies, it is common to see the wheels reversing or standing still, which is why the wheels in the movies seem to be "stationary" and require an integer multiple of 24 rad s. In the workshop, sometimes it is necessary to avoid this phenomenon, and sometimes it is necessary to take advantage of it.