How to define the performance of a magnet?
There are mainly three performance parameters to determine the performance of the magnet:
Remanent Br: After the permanent magnet is magnetized to technical saturation and the external magnetic field is removed, the retained Br is called residual magnetic induction intensity.
Coercivity Hc: B of the permanent magnet magnetized to technical saturation decreases to zero, and the reverse magnetic field intensity required is called magnetic coercivity;
Magnetic energy product BH: represents the magnetic energy density established by the magnet in the air gap space (the space between two magnetic poles of the magnet), namely, the static magnetic energy per unit volume of the air gap. Since this energy is equal to the product of Bm and Hm of the magnet, it is called the magnetic energy product.
Magnetic field: the space that produces magnetic effect on magnetic pole is magnetic field.
Surface magnetic field: Intensity of magnetic induction at a specified position on the surface of a permanent magnet.
How to choose a magnet?
Before deciding which type of magnet to choose, what function should the magnet perform?
Main function: to move, hold, or lift objects.
Shape of magnet required: wafer, round, square, tile or special shape.
Size of magnet required: length, width, height, diameter and tolerance, etc.
The suction of the magnet required, the expected price and quantity, etc.
Post time: Nov-24-2021