除铁器

Permanent magnetic material: permanent magnetic material is magnetized by external magnetic field and its magnetism will not disappear. It can provide stable magnetic field to external space. Ndfeb permanent magnets are commonly used to measure the following four indicators: The unit of remanence (Br) is tesla (T) and gauss (Gs). 1Gs =0.0001T When a magnet is magnetized by an external magnetic field in a closed circuit environment and the technology is saturated, the external magnetic field will be withdrawn. At this time, the magnetic induction intensity of the magnet is called remanence. It represents the maximum magnetic flux value that a magnet can provide. It can be seen from the demagnetization curve that it corresponds to the situation when the air gap is zero, so the magnetic induction intensity of the magnet in the actual magnetic circuit is all lower than the remanence. Ndfeb is the highest practical permanent magnet material ever found in Br. Magnetic inductive coercivity (Hcb) units are an /m (A/m) and oster (Oe) or 1 Oe 79.6A/m The value of the reverse magnetic field intensity required to reduce the magnetic induction intensity to zero is called magnetic inductive coercivity (Hcb) when the magnet is reverse magnetized after saturation magnetization of the technology. But at this time, the magnetization of the magnet is not zero, but the added reverse magnetic field and the magnetization of the magnet cancel each other. If the external magnetic field is cancelled, the magnet still has certain magnetic properties. The coercivity of ndfeb is generally above 11000Oe. Hcj units are an /m (A/m) and oster (Oe) 1 Oe 79.6A/m The strength of the opposing magnetic field required to reduce the magnetization of a magnet to zero is called HCJ. HCQ is a physical quantity to measure the anti-demagnetization ability of a magnet. If the applied magnetic field is equal to the HCQ of the magnet, the magnetism of the magnet will be basically eliminated. Ndfeb Hcj will decrease with the increase of temperature, so we should choose the high Hcj brand when we need to work in the high temperature environment. Magnetic energy product (BH) in focal/meter 3 (J/m3) or high? 1 MGOe 7.96k J/m3 The product of B and H at any point on the demagnetization curve is BH, and the maximum value of BH is called the maximum magnetic energy product (BH) Max. Magnetic energy product is one of the important parameters of the energy stored in a constant magnet. The larger the (BH) Max is, the greater the magnetic energy contained in the magnet will be. When designing the magnetic circuit, the operating point of the magnet should be as close as possible to the B and H corresponding to the maximum magnetic energy product.