The leaves of a wind turbine rotate so slowly, why can it still generate electricity?

Although the leaves of wind power generation rotate slowly, the energy generated by one rotation is very large, so it can generate electricity, and if the leaves of wind power generation turn fast, they will be damaged.

Because these leaves are solar-powered, electricity is generated by the irradiation of sunlight.

The wind turbine is not slowing down because the wind is small, although she is slow, but it can also generate electricity mainly because of the principle of the wind power generation device, there is a gear inside the wind power generation device, it has a variable speed effect, even if the wind turbine blades are slow, but the conversion bearing inside is fast, so there is more power generation.

A wind turbine is an electrical device that converts wind energy into mechanical work, which drives the rotor to rotate and finally outputs alternating current.

The larger the fan, the longer the blades, the heavier the weight, and the slower it turns. The megawatt wind turbine blades weigh about 6 tons, which is twice that of the megawatt wind turbine blades, but they only rotate 18 times per minute, which is only 3 4 of the megawatt wind turbine. But the faster the wind speed, the faster the fan will spin.

When the wind speed reaches 3 meters per second, the megawatt wind turbine can increase the speed by turning the gears, thereby driving the generator to generate electricity.

The wind turbine device is very bulky, so it rotates slowly, not because the wind is small, and I believe that technicians will not install the wind turbine in a place where there is no wind. It rotates slowly, but it also emits electricity, and it doesn't have to be hydroelectric either. Mainly because of the principle of wind power installations.

The leaves of the generator will be seen to rotate very slowly, but there are huge gears behind them, and the gears are inlaid with electric coils, and the larger the gears, the more coils, so the leaves rotate slowly, but there are many coils, and they can still generate electricity. Just like the mechanical wheel rotates once, the small wheel turns ten times.

Because the principle of wind power generation has nothing to do with the speed of leaf rotation, as long as there is a small breeze, the external windmill can be driven, and the internal equipment is specially designed to increase the speed.

I think that because the leaf torque of the wind turbine is also large, when passing through the wind turbine, the speed of the accelerator can be used to generate electricity, and the electricity can be generated.

The wind turbine is a device that converts wind energy into electrical energy, and the principle is: the wind drives the impeller to rotate, and the impeller drives the generator to rotate and cut the magnetic inductance line, converts the wind energy into mechanical work, and the mechanical work drives the rotor to rotate, and finally generates electrical energy. So as long as the blades are moving, electricity can be generated.

Because of these generators, the leaves on it are large and heavy, so they rotate more slowly, so that the life of the generator can be extended.

This is because it does not rely on the speed of the leaves to generate electricity, so even if the speed is slow, it can still have electricity.

As long as it is in the case of wind, no matter whether it rotates fast or slow, as long as it rotates, there will be energy, and it can generate electricity, and the wind turbine is a very environmentally friendly device.

Why can the blades of a wind turbine be used to generate electricity when the blades rotate so slowly?

Wind turbines are a process that converts kinetic energy into electrical energy. The wind drives the rotors in the generator to turn. The kinetic energy generated by rotation will be electrical.

It rotates through the fan blades of the engine, and the engine generally generates an electric current through a magnetic field when it rotates, and then the effect of power generation can be achieved.

There are some variable speed machines in this kind of generator, although it looks very slow on the surface, but in fact the speed is very fast, and there will be some devices in it to transmit the electricity generated by the wind to other places.

The principle of power generation is to convert wind energy into electrical energy and use power to generate electricity.

Because the angle of the blade has changed, the normal is about 45 degrees. When you don't want to turn, it becomes 90 degrees. You can take a closer look.

If the starting torque is the same, then the wind speed in the two places is different.

If the wind speed is the same, then the starting torque of the two phoenix towers is different.

If the power of the two phoenix towers is the same and the wind speed is the same, it is the quality is unqualified, and the starting torque is different.

There are two possible reasons:

1.What does not rotate is that there are staff in the maintenance, and the fan will be temporarily stopped artificially, and then returned to automatic operation after the maintenance is completed.

2.The wind speed is the same place, if it is a fan of different companies, then the requirements for the wind speed of normal pneumatic are different, the wind speed range of the normal operation of the wind speed of some companies' fans is 4---27 m s, and the wind speed of some companies may be 6---23 m sec, so when the wind speed is more than 4---5 m sec or 24 m sec, some will automatically stop, which is a protection program for the unit itself.

It may be that the power is not the same, and the starting wind speed is different.

In two cases, 1 the wind speed and wind direction encountered by each wind turbine are different;

2 Theoretically, the performance of the same model of wind turbine should be exactly the same, but due to the problems of manufacturing and product quality, the performance of each wind turbine is not completely consistent, so even if the same wind conditions (the starting wind speed mentioned upstairs), it cannot be started at the same time.

Wind power generation uses the principle of rotor cutting magnetic induction wires, as long as the wind power leaves can rotate, it can continuously generate electricity.

<> you can refer to the above figure, in fact, as long as the blades are rotating, it will drive the rotor to rotate, and then it can generate electricity.

However, if the blades rotate very slowly, the power generation will be relatively small.

Because the windmill motor is connected to the generator, although the speed of the windmill is very slow, but a turn will be able to provide a steady stream of power for the generator, and now wind energy is the cleanest energy source, and our country has been vigorously promoting it in this regard.

Because power can be generated, as long as there is a steady stream of power, it can provide electricity.

Wind turbines don't spin faster and produce more electricity. Note that the output power of a generator can be roughly considered to be proportional to the product of speed and torque. Here the torque is the electromagnetic torque obtained by the generator excitation.

The torque is so great that the wind can't push the impeller. At this time, the speed is 0, the torque is very large, and the power output is 0. When the torque is zero, the speed will accelerate to a very high level, which is actually a flying car, which is extremely dangerous.

Since the electromagnetic torque is 0, the output power is 0. Power is 0 at both extremes, so there is an optimal speed that maximizes power output.

The ideal value for this optimal speed can be calculated from Baez's theory, the ratio of the linear velocity at the tip of the blade to the wind speed in front of the wheel. At a certain wind speed, there is a nonlinear relationship between the fan output and the blade tip speed ratio. Through theoretical derivation, the optimal tip velocity ratio for each wind speed can be calculated.

A wind turbine is a device that converts wind energy into mechanical energy, then makes the mechanical energy do work, and finally produces alternating current. In fact, wind energy can also be said to be solar energy, because it is also used to generate electricity, and there is no harm to our environment.

It is able to have a lot of energy, because of its internal structure, and not depends on the speed of rotation of the external blades, it is better to do the windmill by yourself, in fact, it has a quiet gear rotation inside, the speed of the windmill rotates at a speed of 20 - 30 per minute, the wind is not enough, this is not to say that it can't put the speed faster, this is because of the weight and length of the blade, see it from a distance, don't think how big it is, in fact, its blade is more than 20 meters long, the weight can be imagined, if the turn is too fast, it will exert a lot of pressure on the base. If a generator collapses or a blade breaks, it can cause an accident that injures nearby residents. If it rotates slowly, there will be no such thing, which ensures that the windmill blades are not injured, are not prone to accidents, and will not affect its power generation efficiency, after all, there is a small motor hidden inside!

With it, even if the wind outside turns very slowly, with a reducer and pinion inside, its speed will increase by about fifty times, basically maintaining a speed of about fifteen hundred revolutions per minute.

How wind turbines generate electricity.

Wind energy is a clean energy source, and it is renewable, so it can be said that it is inexhaustible. More than 2,000 years ago, the ancients learned to use windmills to carry water for irrigation and mill grain. After entering the industrial civilization, people are more interested in how to use wind energy to generate electricity, a resource with extremely low development and utilization rate.

Although the outer blades rotate slowly, each wind turbine is equipped with a speed-increasing machine inside, which can drive the gears of the generator to rotate rapidly, increasing its speed by about 50 times. In this way, the blades on the outside of the wind turbine can rotate 30 revolutions per minute, and the generator gears inside the wind turbine can rotate 1,500 revolutions per minute, so that a large amount of electricity can be generated.

Because wind is a resource that can be recycled, and nature's wind energy is relatively sufficient, it will be used in large quantities.

This is because the shape of the wind turbine blades has been carefully designed to achieve maximum output efficiency with minimum cost.

The design is mainly determined by aerodynamic requirements, but economic decisions require the design of a blade shape with reasonable construction costs. Moreover, the thickness of the blades gradually increases from the tip to the roots, because the roots bear the maximum load.

The main structural considerations are:

1. Length: The length of the blade affects the sweeping area, which also determines the wind catching ability. According to the betz rule, only a maximum of half of the wind energy can actually be captured by the wind turbine.

2. Pneumatic part:

The aerodynamic shape of the blades is clearly visible in the cross-section of the blades, and it is this unique design that creates the thrust that causes the fan to turn.

3. Overlooking the airfoil:

The shape of the blade is progressively narrowed from the root to the tip of the blade to ensure a constant rate of deceleration throughout the swept area. Make sure that the airflow does not pass too slowly through the blades and create turbulence, and that the passing speed is not too fast and the energy is wasted.

4. Section thickness:

From the tip to the root, the blade thickness gradually increases to take on greater loads and moments. If the load is not very important, the ratio of thickness to length is generally 10-15%. The flat part near the root of the blade helps to improve the efficiency of wind catching.

5. Blade torsion design:

Because the rotational speed of the blade increases with the length, the windward angle changes continuously with the extension of the blade. Therefore, in order to maintain an optimal angle of attack in the windward area of the blade, the blade needs to be designed in a torsional form.

6. Number of blades and rotation speed:

Normally, wind turbine blades rotate about 7 to 10 times the speed of the wind, and the current design has a maximum of 3 blades. The higher the rotational speed, the higher the number of blades, which means that the blade size should be narrower and thinner, so it is difficult to ensure that the blade has sufficient strength. When the speed is too fast, the wind catching efficiency of the blades is also reduced, and it is more susceptible to environmental erosion and bird impact.

I think there are several main reasons:

1) In order for the blades to fully absorb the energy from the wind, keep a certain ratio of the tip speed to the wind speed around a certain value, which can effectively achieve the best efficiency.

2) Because the longer the impeller and the heavier the weight, if the speed is too fast, the inertia is large, and if the emergency braking is heavy, the vibration of the fan and the tower is also great.

Of course, I think it's about maintaining the best ratio of leaf tips to wind speed.

The received wind energy is not reduced, and the speed of the generator is relatively stable due to the action of inertia.

The longer the blade, the greater the resistance and the more energy is consumed.

In fact, the blades of the wind turbine are already very large, and the blades are more than ten meters long, but because the base is too large and too high, the blades appear to be small. For the base, the blade proportions must be small, and this is because:

1. The blade must meet: light density and the best fatigue strength and mechanical properties, and can withstand the test of extreme harsh conditions such as storms and random loads. If the load is too large, the base will be difficult to bear;

3. The material of the blade must ensure that the surface is smooth to reduce wind resistance, and the rough surface will also be "torn" by the wind;

4. It will not produce excessive noise;

5. Low cost and low maintenance cost.

The size of this blade is closely related to the power generated by the internal generator. I don't know how big the fan is looking. Our company's 2MW wind turbine has a blade length of 20m, I don't know if it's big or small.

The wind energy that can be received by wind turbines is mainly related to the swept area, not the blade area. The shape of the blades is mainly to improve the wind energy utilization factor.

Wind energy is a clean renewable energy, wind power generation is to make full use of the power of self-heating without destroying the natural ecology to obtain the electricity we need, but many people will ask, the fan blades of the wind turbine rotate so slowly, how does it generate electricity?

Wind power generation is to convert the kinetic energy of the wind into mechanical kinetic energy, and then convert the mechanical energy into the electrical energy needed for our life. The blades of the wind turbine turn about 20 times per minute, which seems to be very slow, and the reason why the blades rotate so slowly is that it has a lot to do with its own weight and wind speed, the fan blades of the wind turbine are generally more than 20 meters long, such a heavy blade, if it rotates at high speed, the base will inevitably be unable to withstand its pressure and collapse.

Or it is easy to cause the blade to break, and the fan blade rotates slowly, which can effectively protect the fan from injury. Its power generation principle is to use wind power to drive the windmill blades to rotate, and then increase the speed of rotation through the speed increaser to promote the generator to generate electricity. Although the blades rotate at a speed of about 19 to 30 revolutions per minute, the internal gearbox can increase the speed of the internal high-speed shaft to 50 times that of the low-speed shaft, which means that the high-speed shaft runs at 1500 revolutions per minute and drives power generation, which is quite efficient.

Therefore, the power generation of the wind turbine does not depend on the speed of the blade rotation, in the case of the constant speed of the blade, the power of the blade will increase, the larger the blade of the fan, the greater the power, and the more the corresponding power generation.

The aircraft will generally accelerate on the runway at full speed before takeoff, and the aircraft can not leave the ground until it reaches a certain lift, and lift is also the key to whether the aircraft can fly into the blue sky. I believe that many friends know the knowledge of lift, the unique wing structure of the aircraft can make the air flow velocity above and below the wing unequal, forming a pressure difference, this pressure difference is the lift, when the lift is greater than the weight of the aircraft itself, the aircraft can leave the ground. Just like a bird needs to flap its wings vigorously when taking off, an airplane cannot flapp its wings, but it can gain lift by accelerating with all its might, so the plane needs to glide on the runway for a certain distance before it can take off.

Of course, the whole process in the middle can take about 30-50 seconds for the plane to accelerate to the ready state of takeoff, which is generally about 145 knots, that is, about 268 km h. If the plane wants to pull up the nose and take off below this speed, the risk is very large, and the plane may stall and fall due to insufficient lift. Therefore, under normal circumstances, the plane will run as long as possible before taking off, so as to achieve absolute safety during takeoff, after all, the safety of passengers is the first priority.