Is Absorption of the Same Performance and Volume Magnet?
Many friends may have such a question, the same performance and volume magnet, do they suck the same? It is said on the Internet that the suction power of the iron boron boron is 640 times the weight of its own weight. Is this credible?
This problem can actually be divergent, which is what factors of magnets are related to. First of all, it is clear that the magnets only have adsorption for ferromagnetic substances. There are only three types of iron magnetic materials at normal temperature, which are iron, cobalt, nickel and its alloys. There is no adsorption force for non -ferromagnetic materials.
Some formulas that can be found on the Internet:
F = k*b s*s/2
F = 0.577*s*b=
Are these formulas accurate? The answer is inaccurate, but the trend is no problem. The size of the magnetic absorbing power is related to the strength of the magnetic field and the adsorption area. The greater the strength of the magnetic field, the greater the adsorption area, and the greater the suction power.
The next question is that the same volume of magnets are flat, cylindrical, and slender, and are the suction power as large? If not, which kind of suction power is the greatest?
First of all, it is certain that the suction power is different. Which of the maximum suction power must contact the definition of the maximum magnetic energy accumulation. When the working point of the magnet is located near the maximum magnetic energy accumulation, the magnet has the maximum functional amount. The adsorption power of magnets is also a manifestation of work, so the corresponding absorption is the greatest. It should be noted here that the suction matter needs to be large enough, and it needs to be completely covered with the size of the magnetic polarity. This can not consider the factors such as the material, size, and shape of the suction material.
How to judge whether the working point of the magnet is at the maximum magnetic energy accumulation point? When the magnet is directly adsorbed with the absorbing material, its adsorption force determines the size of the air gap magnetic field and the adsorption area. Taking cylindrical magnets as an example, when h/d≈0.6 When the work point is near, the suction is the most. This is also in line with magnets as adsorptions as adsorbents. It is usually designed as relatively flat shape. Taking the magnet of the N35 D10*6 as an example, the absorption of the adsorption iron plate can be calculated by FEA simulation, which can almost reach the maximum value of the same volume magnet, which is 780 times its self -weight.
The square magnet is similar to the circular magnet. When it is directly adsorbed as the inhaled material, the central PC≈1 is near the maximum magnetic energy accumulation working point. 10*8.
Of course, the above is only the adsorption state of the single pole of the magnet. If it is multi -polarized, the suction power will be completely different. The suction power of the multi -polarity will be much greater than that of the single pole (the premise of the small spacing of the adsorbent).
Why does the same volume of the same volume make a multi -polarity, the suction power will change so much, because the adsorption area S remains unchanged, and the B value of the magnetic flux density of the inhaled material is increased a lot. It can be seen through the following magnetic wire diagram. The multi -polar magnetic magnet, the magnetic liner’s density has increased significantly through the iron sheet. Taking the magnet of the N35 D10*6 as an example, it is made into a bipolar massage. The suction power of the FEA simulation adsorption of the iron plate is about 1100 times the weight of the self.
Since the magnet is made into a multi -polarity, each pole is equivalent to a longer and slender magnet. The PC value has changed, and the PC value of the overall size cannot be calculated. Therefore, its best size is no longer H/D≈ 0.6, but a more flat magnet, the specific size is related to the multi -polar magnetic method.