NdFeB Magnet And Ferrite Magnet

The mainly advantage of NdFeB permanent magnet is price high and has good characteristics in machine direction. Characteristics of temperature are relatively poor, and easy to powder corrosion. It must improve chemical properties by adjust the chemical composition and the surface treatment method. In order to meet the requirement of practical application that we need.
Ferrite permanent magnet is a kind of metal oxide with ferromagnetic. Compared to metal and alloy magnetic material, the resistivity of ferrite permanent magnet is more large and also has a little high dielectric properties. Magnetic of ferrite magnet also show in the high magnetic permeability at high frequency. So ferrite magnet has been become a non metallic material which is widely used for high frequency weak electric field.
The main differences between NdFeB permanent magnet And ferrite permanent  magnet are as followings:
Magnetic properties of ferrite magnet is worse than  NdFeB magnet, but price is more cheap.
Temperature resistant of the NdFeB permanent magnet is good. However the ordinary NdFeB magnet can only bear 80 degree.
3.Ferrite permanent magnet stability is very good. It is oxide and very stable. NdFeB permanent magnet is alloy and easy to oxidation. So you must coat to protect.

Permanent Magnet Effect On The Shock Absorber

Permanent magnet is a kind of magnet which can ensure its magnetic without the external magnetic field. Different materials of permanent magnet have different magnetic time. The atomic structure of the permanent magnet is special and it has a magnetic moment of atom.In general, these mineral molecular disorganized. Can not appear the magnetic with mutual effect. But molecular orientation tend to the same with external force. Iron,cobalt, nickel are the most common magnetic material.
Permanent magnet plays an important role in the shock absorber. The shock absorber and the permanent magnet group will  be embedded in the movement of the piston. The piston rod is fixed on the the cylinder of shock absorber through both ends of the nylon sliding bearing. At this time, there will be a gap between the cylinder and piston. It makes the piston of permanent magnet reciprocating sliding freely in the cylinder.
Then the stator coil of cylinder will connect the wire and external electronic controller ECU directly. When the electric vehicles in good damping property road, it will make piston move reciprocating because of the end of shock absorbe connect with the wheels or the cradle directly.
The strong magnetic field due to the high density of the permanent magnets will continue to cut the stator coil. This will make the stator coil to generate induction AC, turning into DC after rectification. Then transmission electronic control switch.