Permanent magnetic materials: magnetic materials is magnetized in a magnetic field will not disappear, can provide a stable magnetic field of the external space. Four commonly used indicator of NdFeB magnets Nd-Fe-B magnets

Remanence (Br) Tesla (T) and Gaussian (GS) 1GS = 0.0001T

In a closed environment, the external magnetic field of the magnet after removing the external magnetic field saturation magnetization technology, the performance of the magnet at this time is called the remanence magnetization. This means that the maximum flux value can be provided. From the demagnetization curve, corresponding to the case, when the gap is zero, the magnetic flux density is less than the actual magnetic remanence. NdFeB is the highest bromine practical permanent magnet material ever found.

Coercivity magnetic induction (HCB) in units of A / M (A / M) and Oster (OE) or 1 OE≈79.6A / m

In the saturation magnetization ?? art technology is the opposite magnetized magnet, a value of zero magnetic induction twisted magnetic induction field strength is called the coercive force (coercivity). However, this is not a zero in the magnetization of the magnet, the reverse influence magnetized magnet field cancel each other out. (The performance of the external magnetic field flux density is zero), then if the field is withdrawn magnets still has some magnetic properties. NdFeB coercivity generally 11000Oe. Ferrite magnets

Intrinsic coercivity (Hcj) units of A / M (A / M) and Oe Oe ≈79.6A / m

Is applied to the magnet magnetization reversal magnetic field strength required to zero, we call the intrinsic coercivity. A measure of the intrinsic coercivity magnetic resistance of a physical-demagnetization, the magnetic field applied if equal to the intrinsic coercivity of the magnet will be substantially eliminated. NdFeB Hcj as the temperature rises, so the need to work in high temperature environment, you should choose a high Hcj grades. Sided magnet

J / m 3 (J / m3) or high energy product (BH) unit? Austria (GOE) 1 MGOe ≈7. 96K J / m3

At any point of the demagnetization curve B and H of the commodity in both BH we call the maximum energy product B × H is called the maximum energy product (BH) max of. Important parameters of the size of the energy product, the greater the greater the magnet (BH) max contains the magnetic energy stored in a constant magnetic field energy. The above design operating point corresponding to the maximum energy product of B and H as nearby magnetic circuit. ...