Concentration Problem of Powerful Strong Magnets
One of the daily tasks in the overall planning of the equivalent circuit of a strong magnet is to drive the magnetic flux density of the magnetic air gap as far as possible. The analogy of the power circuit to the current intensity driving is simple, just modify the cross section of the transmission line. The smaller the cross-section, the higher the current intensity, the less convenient the equivalent circuit, and except in rare cases, there are no chemical substances that are impermeable to the magnetic field lines.
Only a conductive magnetic field, no non-conductive magnetic field (at least not at room temperature, only the nanotube chemical substance is non-magnetic in the case of nanotubes, but a little modification of the design of the equivalent circuit is used, the permanent magnetic material and the magnetic field are modified Proper placement, it is still possible to drive the magnetic flux density of the working magnetic density. The conduct of the magnetic flux density of the driving working magnetic density depends on the attraction of opposites and the repulsion of the same sex.
The key to the method of concentrating magnetism is to modify the cross section of the equivalent circuit to avoid the mutual emptying of the magnetic field lines. There is an inevitable connection between the thickness and the magnetic function. The magnetization of the permanent magnet material is a volume quantity, which has been mentioned before, while the magnetic flux density is related to the total area.
is a total area quantity, Φ is the magnetic flux, and enterprise is Weber (Wb) Lu is the normal section crossed by the magnetic flux. Following the coercive force of the rare earth permanent magnet material, it responds to the landing of the conductivity μ, and is close to the gas permeability I. In this way, the magnetoelectric type of the permanent magnet material itself cannot be ignored, so the length of this type of permanent magnet material in the magnetized orientation is limited. Not suitable for too long. The process of magnetism, we Chinese people were magnetized by friction with iron rods and magnetic rods a thousand years ago, and made the world’s first compass. Around 1100, we Chinese used a magnet needle and a steering wheel to connect together to make a magnet manual instrument for ocean navigation. In 1820, Dutch scientists discovered that electric current induces magnetism. In the 1930s, Japan discovered a new magnet with nickel, aluminum, and cobalt mixed elements. Powerful Strong Magnets
In the 1970s, Japanese biologists created neodymium magnets. This new type of magnet was called “magnetite, which was discovered 5,000 years ago. Before 2300, we Chinese crushed the magnet into a spoon and placed it on the smooth sky. , Under the function of the geomagnetic sensor, the spoon handle manual is the first manual of rare earth permanent magnets in the world.
The whole process of manufacturing permanent magnets: casting sand molds that require the appearance design of the magnets, and then the magnets can be forged. The materials include: copper, cobalt, sulfur powder, nickel, iron, aluminum and titanium. The metal material is put into an electromagnetic induction furnace, heated to above 1600 ℃, and all metal materials are melted into liquid. Pour the aqueous solution into the sand mold, and the sand mold will be extinguished, because the vapor in the hardened sand is flammable. Powerful Strong Magnets
Smash the casting mill with a hammer, let the gas enter the cooling material in the casting mill, and let the gas burn out. Divide the metal material from the sand block into the bangs, and the forged metal material is still an ordinary steel block, which does not have any magnetic properties. Tie the metal product to the copper pipe of the air conditioner, put it into a larger water pipe, put the copper pipe of the air conditioner in the middle part, and fill the surrounding area with silica sand.