The basic principle of magnetic power generation:
When a metal coil intersects a magnetic induction line in a magnetic field, a magnetically induced electromotive force (voltage) is generated under a microscope. if a voltage difference is generated, a current will be formed and the direction of the current is opposite to the direction of the electrons. The directional movement of electrons generates a current, thus making the object charged.
Principle of static magnet generator:
By applying alternating voltage to the magnetizing coil, the direction of the magnetic lines of force of the closed magnetic circuit is changed and due to the closing ; The change of direction of the magnetic field lines in the magnetic circuit induces the change of the magnetic field lines in the open magnetic circuit, thereby generating an electromotive force in the induction coil through electromagnetic induction.
Infdetailed information:
The composition of a static magnet generator:
A static magnet generator, at least one permanent magnet; A first iron core, which couples different magnetic poles of the permanent magnet to form a closed magnetic circuit;
A second iron core, which couples to the closed magnetic circuit through a paramagnetic material to form an open magnetic circuit. .Magnetic circuit;
A magnetizing coil; and an induction coil, by applying an alternating voltage to the magnetizing coil, the direction of the magnetic lines of force of the closed magnetic circuit is changed;
And through the change of the magnetic lines of force of the magnetic circuit open induced due to the change of direction of the magnetic force lines of the closed magnetic circuit, electromagnetic induction is used to generate electromotive force in the induction coil.
EncyclopediaBaidu - Magnetism generates electricity
Don't mislead those above Once a magnet has magnetized a piece of iron or repelled a magnet from the same pole , magnetism will occur. of course, weaken. Use a This is an inappropriate metaphor. Energy is conserved. Is there a reason the energy was radiated but its own energy didn't change?
To put it simply, the reason why magnets are magnetic is that there are many magnetic domains in the same direction arranged in an orderly fashion inside the magnet. When the iron piece is close to the magnet, it will do so. magnetize the magnetic field of the magnet. You can also see The magnet becomes a piece of small magnet. The two different magnetic poles attract each other and the magnet attracts the iron. If the internal arrangement of the magnet is disordered, the magnet will weaken the magnetism or even disappear. For example, if youheat the magnet or iron sheet, or if you hit the magnet vigorously, the magnet will be disordered and the magnetism will disappear. you are interested, you can try Try using a magnet to pick up a piece of burnt red iron, but you definitely won't be able to pick it up.
Once the magnet attracts the iron piece, it will also change the order more or less. Many so-called permanent magnets sold now only change the order very slightly or have other magnetic compensation devices. The magnetic strip of a credit card can also be thought of as a small magnet. After using it for a while, it needs to be remagnetized.
If you have time, you can do an experiment. Buy a magnet and attach it to iron objects. After a while the magnetism will weaken and if left for a long time it will eventually weaken. to fall.