## Monday, June 5, 2023

how to turn the grinder into a 250v generator

How to make a 50,000V high voltage generator / Wind an electrical transformer.

In this video I explain how to make a 50,000V high voltage generator from A to Z!

To do this we will wind / manufacture an electrical transformer and all this you can do at home.

here is my little novelty. the electric motor as a generator

I replaced the copper wires in the rotor with two large ferrite magnets, which I found in a 24v DC motor. Both in the shape of ( and ) . which went perfectly to the reels! well almost but it's just a test.

I managed to light a car light bulb by turning it with a cordless drill.

I will try to put it on a belt on the rear wheel of my bike to see :)

by hand I pulled out between 1 and 2 volts quickly.

• Build your own wind turbine: Wind is a free and inexhaustible source of energy. There are more and more industrial wind turbines capable of producing several Megawatts, yet it is also possible to manufacture a small wind turbine yourself! The objective of this video is to give you all the information we have acquired to help you make one, both in terms of construction and theory.

But by the way, why give an angle to the blades? When the wind blows over a tilted blade it slows down below so the pressure increases. On the contrary, above the blade the air accelerates which slightly decreases the pressure. This pressure difference creates a force that pushes the blade, so it begins to rotate. Our blades don't have the best shape, ideally they should have a more aerodynamic airplane wing shape which would accentuate the pressure differences but you can imagine that this shape is much more difficult to manufacture.

But what's the point of twisting the blades? To put it simply, at a given wind speed, the lower the angle of a blade, the faster it tends to go, on the contrary, the higher the angle, the greater the torque, i.e. the force which tends to turning the propeller is strong. You suspect that the further a point is from the axis, the faster it moves. If we want each zone of the blades to tend to make the propeller turn at the same speed and therefore optimize efficiency, the angle must decrease as we move away from the axis. In our wind turbine the angle is 20 degrees near the axis and about 7 degrees further away.

Why not put a generator directly on the axis of the wind turbine as is the case with most domestic wind turbines? The main reason is that we simply don't live in a windy area, windy days are rare and if we had built a wind turbine as small as commercial wind turbines, it would hardly ever turn. Our wind turbine must therefore capture as much wind as possible, which is why it has 9 blades when we could have only put 3 and it has a diameter of two meters. It is therefore extremely sensitive to the wind and begins to turn with an imperceptible wind of 3Km/h. On the other hand, its rotation speed is often low and it would have required a huge generator to produce a strong current with such a low speed. It is therefore necessary to increase the speed of rotation of the generator with a gear to produce a usable power with a small generator. Increasing the speed of the generator makes it possible to better exploit the power of the wind but it does not create more energy.

It will not surprise you but to turn a wind turbine really needs wind! Why are we telling you this? Because the power of the wind is not proportional to its speed. When an object is in motion it has kinetic energy, this energy doubles when the mass doubles and multiplies by 4 when the speed doubles. It is also valid for the wind except that when its speed doubles the mass which circulates also doubles. We can therefore demonstrate that with twice as much wind we produce 8 times more energy, the power increases with the cube of the speed! An example with our wind turbine, if the wind is homogeneous at 10Km/h the power that reaches it is 40W and if the wind goes at 20Km/h this power is 320W, the difference is incredible!

For 20Km/h the power of the wind which circulates in the disc of the wind turbine is worth 320W but can we really produce 320W of electricity? And no, that would be too good. A wind turbine slows down the wind to turn, the more it slows it down the more energy it recovers. However, the more the wind is slowed down, the lower the flow rate. There is therefore a compromise which is called the Betz limit. A perfect wind turbine must slow the wind to a third of its speed and the ideal efficiency is 59%. In practice it is still much because of the friction of the air and the angle of the blades which is not always adapted to the speed of the wind.

how to turn the grinder into a 250v generator

How to make a 50,000V high voltage generator / Wind an electrical transformer.

In this video I explain how to make a 50,000V high voltage generator from A to Z!

To do this we will wind / manufacture an electrical transformer and all this you can do at home.

here is my little novelty. the electric motor as a generator

I replaced the copper wires in the rotor with two large ferrite magnets, which I found in a 24v DC motor. Both in the shape of ( and ) . which went perfectly to the reels! well almost but it's just a test.

I managed to light a car light bulb by turning it with a cordless drill.

I will try to put it on a belt on the rear wheel of my bike to see :)

by hand I pulled out between 1 and 2 volts quickly.

• Build your own wind turbine: Wind is a free and inexhaustible source of energy. There are more and more industrial wind turbines capable of producing several Megawatts, yet it is also possible to manufacture a small wind turbine yourself! The objective of this video is to give you all the information we have acquired to help you make one, both in terms of construction and theory.

But by the way, why give an angle to the blades? When the wind blows over a tilted blade it slows down below so the pressure increases. On the contrary, above the blade the air accelerates which slightly decreases the pressure. This pressure difference creates a force that pushes the blade, so it begins to rotate. Our blades don't have the best shape, ideally they should have a more aerodynamic airplane wing shape which would accentuate the pressure differences but you can imagine that this shape is much more difficult to manufacture.

But what's the point of twisting the blades? To put it simply, at a given wind speed, the lower the angle of a blade, the faster it tends to go, on the contrary, the higher the angle, the greater the torque, i.e. the force which tends to turning the propeller is strong. You suspect that the further a point is from the axis, the faster it moves. If we want each zone of the blades to tend to make the propeller turn at the same speed and therefore optimize efficiency, the angle must decrease as we move away from the axis. In our wind turbine the angle is 20 degrees near the axis and about 7 degrees further away.

Why not put a generator directly on the axis of the wind turbine as is the case with most domestic wind turbines? The main reason is that we simply don't live in a windy area, windy days are rare and if we had built a wind turbine as small as commercial wind turbines, it would hardly ever turn. Our wind turbine must therefore capture as much wind as possible, which is why it has 9 blades when we could have only put 3 and it has a diameter of two meters. It is therefore extremely sensitive to the wind and begins to turn with an imperceptible wind of 3Km/h. On the other hand, its rotation speed is often low and it would have required a huge generator to produce a strong current with such a low speed. It is therefore necessary to increase the speed of rotation of the generator with a gear to produce a usable power with a small generator. Increasing the speed of the generator makes it possible to better exploit the power of the wind but it does not create more energy.

It will not surprise you but to turn a wind turbine really needs wind! Why are we telling you this? Because the power of the wind is not proportional to its speed. When an object is in motion it has kinetic energy, this energy doubles when the mass doubles and multiplies by 4 when the speed doubles. It is also valid for the wind except that when its speed doubles the mass which circulates also doubles. We can therefore demonstrate that with twice as much wind we produce 8 times more energy, the power increases with the cube of the speed! An example with our wind turbine, if the wind is homogeneous at 10Km/h the power that reaches it is 40W and if the wind goes at 20Km/h this power is 320W, the difference is incredible!

For 20Km/h the power of the wind which circulates in the disc of the wind turbine is worth 320W but can we really produce 320W of electricity? And no, that would be too good. A wind turbine slows down the wind to turn, the more it slows it down the more energy it recovers. However, the more the wind is slowed down, the lower the flow rate. There is therefore a compromise which is called the Betz limit. A perfect wind turbine must slow the wind to a third of its speed and the ideal efficiency is 59%. In practice it is still much because of the friction of the air and the angle of the blades which is not always adapted to the speed of the wind.