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Ndfeb magnet manufacturers to share knowledge about magnetism content ( A)

by:Newland     2020-05-06
Resolution: iron boron magnet manufacturer magnetism of commonly used unit conversion ndfeb magnet manufacturers analytic: permanent magnet magnetic concepts: permanent magnet is plus after magnetization of magnetic field does not disappear, can provide a stable external space magnetic field. Commonly used measure of ndfeb magnet has the following four kinds: 1, the remanent magnetization ( Br) The unit is the tesla ( T) And gaussian ( Gs) 1 g = 0。 0001 t will be a magnet magnetization to technology by external magnetic field in a closed environment after saturated undo the external magnetic field, the magnetic induction intensity we call residual magnetism of the magnet performance and now. It said magnet can provide maximum flux values. Visible from the demagnetization curve, it corresponds to the air gap is zero, so the actual magnetic induction intensity of magnetic circuit of the magnet are smaller than the residual magnetism. Ndfeb is now found in Br the highest practical permanent magnetic material. 2, magnetic coercive force ( Hcb) The unit is/m ( A/m) And oster ( Oe) Or 1 Oe material 79. 6 a/m in technology after the saturation magnetization of magnet magnetization when in reverse, the magnetic induction intensity is zero needed to reverse the value of the magnetic field strength is called magnetic induction coercive force ( Hcb) 。 But at the moment of magnet magnetization is not zero, but with the reverse magnetic field and magnet magnetization effects cancel each other out. ( External magnetic induction intensity is zero) At this point if cancel the external magnetic field, magnets still has a certain magnetism can. Summary of coercive force is usually more than 11000 oe. 3, the intrinsic coercive force ( Hcj) The unit is/m ( A/m) And oster ( Oe) 1 Oe≈79. 6 a/m make magnet magnetization reverse magnetic field strength required for zero, we call it intrinsic coercive force. Intrinsic coercive force is measured magnet demagnetization resistance of a physical quantity, if the additional magnetic field is equal to the intrinsic coercive force magnets, magnet magnetic will basically eliminated. Summary of Hcj will decrease with the increase of temperature and so need to work in high temperature environment should choose high grade with Hcj. 4, magnetic energy product ( BH) Unit is focal/m 3 ( J/m3) Or high, 通用) 1 MGOe≈7。 96 k J/m3 demagnetization curve on any bit of B and H is the product of BH we called magnetic energy product, and the maximum of B * H called the maximum magnetic energy product ( BH) 上限。 Magnetic energy product is one of the important parameters of stored energy constant magnet size, ( BH) The larger the Max description magnets containing magnetic energy is larger. Magnetic circuit design as far as possible to make the working point of magnets in near maximum magnetic energy product of B and H.
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