How does a fan work? How does an electric fan work

See below how it works:

The working principle of the electric fan is that the energized coil in the AC motor rotates under the force of the magnetic field, converting the electrical energy into mechanical energy, and at the same time, due to the resistance of the coil, a part of the electrical energy is converted into thermal energy. In addition, low-power motors such as DC motors and brushless DC motors are increasingly widely used in small fans.

There are several types of fans, there are AC, DC, brushless and brushed, and the basic principle is the same. The use of electromagnetic induction to promote the fan blade rotation, the specific circuit design and mechanism design and according to the different types and some differences, such as DC brushless motor, its fan blade has a rubber magnet, for the permanent magnet, is the rotor, the stator is the coil, the circuit board is fixed on the first ring, there is a sensor on the board for the magnetic pole sensor--- hall sensor, when the sensor senses the magnetic pole in the fan blade is the n pole, it is converted into an electrical signal, and the circuit adjusts the current direction from left to right (assumption), The stator generates a thrust that rotates the fan blades. When the fan blade is turned to the S pole, the sensor senses it, and converts it into another electrical signal, so that the current direction changes from right to left, and then generates a thrust to push the fan blade to continue running.

In addition, there are three-phase motors and the like. The principle is similar, in the final analysis, it is to use the repulsive force of the magnet, but after the repulsion, the fan blade rotates and becomes attracted, so the role of the circuit design is to change the magnetic properties of the coil in time, so that the fan continues to produce the repulsive force.

How the AC fan works:

The difference between an AC fan and a DC fan. The former power supply is AC, and the power supply voltage will be positive and negative alternating, unlike the DC fan power supply voltage is fixed, and must rely on circuit control, so that the two groups of coils can work in turn to produce different magnetic fields. The higher the frequency, the faster the magnetic field switching speed, and the faster the rotational speed will theoretically, just like the principle that the more poles of the DC fan, the faster the speed.

However, the frequency should not be too fast, as it will make activation difficult.

DC fan: A magnetic field is generated around a conductor passing through an electric current, and if this conductor is placed in another fixed magnetic field, a suction or repulsion force will be generated, causing the object to move. Inside the blades of the DC fan, a rubber magnet filled with magnetism is attached.

Two sets of coils are wound around the shaft of the silicon steel sheet, and a Hall sensing unit is used as a synchronous detection device to control a set of circuits that make the two sets of coils around the shaft work in turns. The silicon steel sheet produces different magnetic poles, which generate repulsive force with the rubber magnet. When the repulsion force is greater than the static friction of the fan, the fan blades rotate naturally.

Thanks to the synchronous signal provided by the Hall sensing unit, the fan blades are thus in continuous operation.

The main component of the electric fan is: AC motor. Here's how it works:

The energized coil rotates by force in a magnetic field. The form of energy conversion is: electrical energy is mainly converted into mechanical energy, and at the same time, because the coil has resistance, it is inevitable that a part of the electrical energy will be converted into internal energy.

When the electric fan is working (assuming that there is no heat transfer between the room and the outside world), the temperature in the room will not only not decrease, but will rise. Let's analyze the reasons for the temperature increase: when the electric fan is working, because there is an electric current through the coil of the electric fan, the wire is resistive, so it will inevitably generate heat and release heat to the outside, so the temperature will rise.

But why do people feel cool? Because there is a lot of sweat on the surface of the human body, when the electric fan is working, the indoor air will flow, so it can promote the rapid evaporation of sweat, combined with "evaporation needs to absorb a lot of heat", so people will feel cool. Delete.

Although the summer has passed, the fans at home have not been put away, and everyone should be able to see that there is a small mechanism at the "back of the head" of the fan. It's just a raised part, and if you press it down gently, the fan will start shaking its head on its own.

In fact, a single-phase motor drives the fan wings to rotate to produce wind (even if the air moves), and whether the wind blows forward or backward is determined by the arc of the fan wings and the steering of the motor.

Friend, the electric fan motor is 220V, generally there are two coil windings, one is the running winding, and the other is the starting winding with the capacitor, when the 220V power supply is added, because the winding and inductance of the electric winding container and the winding have a 90-degree relationship, which generates a rotating magnetic field to make the electric fan motor rotate and run; The fan motor is 380V, generally the motor has three coil windings, which are 120 degrees different from each other in space, and when the 380V power supply is added, due to the nature of the three-phase alternating current and the winding are 120 degrees apart, a rotating magnetic field is generated, so that the electric fan motor rotates and runs.

The working principle of the electric fan is that the energized coil in the AC motor rotates under the force of the magnetic field, converts the electrical energy into mechanical energy, and the electric fan makes the surrounding air flow, prompting the sweat secreted by the first class to evaporate, take away the heat in the body, and achieve the purpose of cooling the body.

How the electric fan works:

Electric fans have two engines that are only pneumatically connected and have concentric shaft rotors, called twin-rotor turbofan engines. Its operating principle and structural characteristics are basically the same as those of a twin-rotor turbojet engine.

In a twin-rotor turbofan engine, the compressor is called a high-pressure compressor because the pressure at the inlet air of the compressor behind the fan is the pressure at the outlet of the fan, which is much higher than the atmospheric pressure.

The turbine behind the combustion chamber that drives the high-pressure compressor is called a high-pressure turbine, which is composed of a high-pressure compressor rotor and a high-pressure turbine rotor. The turbine that drives the fan behind the high-pressure turbine is called a low-pressure turbine, and a low-pressure rotor consists of a fan rotor and a low-pressure turbine rotor.

The main component of the electric fan is: AC motor. Here's how it works:

The energized coil rotates by force in a magnetic field. The form of energy conversion is: electrical energy is mainly converted into mechanical energy, and at the same time, because the coil has resistance, it is inevitable that some electrical energy will be converted into thermal energy.

There is a lot of sweat on the surface of the human body, and when the electric fan is working, the indoor air will flow, so it can promote the rapid evaporation of sweat, combined with "evaporation needs to absorb a lot of heat", so people will feel cool.

1.The working principle of the fan is that the energized coil in the AC motor 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.

2.When the fan is working, the temperature in the room not only does not decrease, but rises. Here's why:

When the fan is working, the conductor is resistive due to the current passing through the coil of the fan, so it will inevitably generate heat and increase the surrounding temperature. However, the fan makes the surrounding air flow, which causes the sweat secreted by ** to evaporate, taking away the heat in the body to achieve the purpose of cooling the body. However, the indoor air temperature does not decrease, so after using the fan for a while, its cooling sensation will decrease.

Introduction: I remind you that you must not be frightened by this lofty theoretical topic, you must read it carefully As far as you know, the structure of the electric fan is very complex, and I have studied its working principle in order to uncover the mystery of the electric fan.

1.First I removed the casing of the electric fan and found several important parts - the timer, the motor, the wiring board.

2.Separate the terminal strip from the motor.

3.Focus on disassembling the motor.

4.Teardown the timer.

5.Study the circuit board.

1.The fan is mainly composed of a fan head, a fan blade, a net cover and a control device, and the fan head includes an electric motor, a front and rear end cover, and a moving head air supply mechanism. Electric fan is a kind of household appliance that uses an electric motor to drive the fan blade to rotate to accelerate the circulation of air, which is mainly used to cool off the heat and dredge the air.

2.The main component of the electric fan is: AC motor.

Its working principle is: the energized coil rotates under the force of the magnetic field, converting electrical energy into mechanical energy, and at the same time, due to the resistance of the coil, it is inevitable that a part of the electrical energy will be converted into thermal energy. If it is assumed that there is no heat transfer between the room and the outside world, the indoor temperature will not only not decrease when the electric fan is working, but will increase.

3.Electromagnetic induction principle: when a part of the conductor in the closed circuit is cut by the magnetic inductance line, the induced current will be generated in the circuit.

4.Lenz's law: The magnetic field force (ampere force) on the induced current on a moving conductor always resists (or hinders) the movement of the conductor.

5.Why do people feel cool when they use electric fans? Because there is a lot of sweat on the surface of the human body, when the electric fan is working, the indoor air will flow, so it can promote the rapid evaporation of sweat, as we all know, evaporation needs to absorb a lot of heat, therefore, we will feel cool.

Enter the area and get the decoration for free**].

Electric fans are electrical appliances that we often use in our daily life, and in a room with an air-conditioned room, turning on the electric fan can effectively reduce the indoor temperature. So how does an electric fan work? What are the classifications of electric fans?

1. What is the working principle of the electric fanThe electric fan has an electric coil, which can rotate randomly as long as it is subjected to force in the magnetic field, and can convert the electrical energy into mechanical energy after being energized, and the motor drives the fan blades to rotate, so as to accelerate the air circulation. The reason why the human body feels cooler is mainly because there is a lot of sweat on the surface of our body, and when the electric fan is running, it will make the air circulate, which will promote the evaporation of sweat, so it will make us feel cooler. 2. What are the types of electric fans 1. Floor fans are also a more common type, which has intelligent and traditional mechanical types, but the air volume will be larger when running, and the noise generated is relatively low.

And it has a chassis, so it will be more stable, bring a better cooling effect in the hot summer, and is suitable for use in the living room or office. 2. Desk fan is also a relatively common type, its size is relatively small, and the noise is not particularly large when running. At the same time, it is relatively safe to use, but also classic and durable, some of this kind of table fan can shake the head, and some are fixed.

3. In addition, there are bladeless fans, which are more popular in the current market, with a relatively novel design, a very prominent sense of fashion, and a relatively beautiful appearance, giving people a visual enjoyment. Relatively speaking, it is more convenient to clean, it is not easy to pinch children's fingers, and the energy consumption is relatively low, so it is more energy-saving and environmentally friendly. However, relatively speaking, ** is slightly higher.

4. There are also ceiling fans, which are generally installed directly on the ceiling, which brings strong wind and is suitable for installation in larger spaces, such as factories or canteens. Summary: The above introduction is the working principle of electric fans, and what are the types of electric fans, there are still many types, so they are used in different places, and consumers can choose according to their actual needs.

Do the math how much it will cost you to renovate your home

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

A fan is mainly composed of components such as a fan head, blades, grille, and controls. 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.