About Some Magnet Knowledge
Permanent magnet material: The permanent magnet material is magnetized by an external magnetic field and does not disappear. It can provide a stable magnetic field to the external space. There are four common metrics for NdFeB permanent magnets:
Remanence (Br) units are Tesla (T) and Gauss (Gs) 1Gs = 0.0001T
A magnet is magnetized by an external magnetic field in a closed circuit environment to cancel the external magnetic field after the technology is saturated. At this time, the magnetic induction intensity exhibited by the magnet is called remanence. It represents the maximum flux value that the magnet can provide. It can be seen from the demagnetization curve that it corresponds to the case where the air gap is zero, so the magnetic induction intensity of the magnet in the actual magnetic circuit is smaller than the remanence. NdFeB is the highest practical permanent magnet material found in Br today.
A magnet is magnetized by an external magnetic field in a closed circuit environment to cancel the external magnetic field after the technology is saturated. At this time, the magnetic induction intensity exhibited by the magnet is called remanence. It represents the maximum flux value that the magnet can provide. It can be seen from the demagnetization curve that it corresponds to the case where the air gap is zero, so the magnetic induction intensity of the magnet in the actual magnetic circuit is smaller than the remanence. NdFeB is the highest practical permanent magnet material found in Br today.
About Some Magnet Knowledge
The magnetic coercivity (Hcb) unit is A/m (A/m) and Oe (Oe) or 1 Oe≈ 79.6A/m.
The value of the reverse magnetic field strength required to reduce the magnetic induction to zero when the magnet after the technical saturation magnetization is reversely magnetized is called the magnetic induction coercive force (Hcb). However, the magnetization of the magnet is not zero at this time, but the applied reverse magnetic field and the magnetization of the magnet cancel each other out. (The external magnetic induction performance is zero.) At this time, if the external magnetic field is removed, the magnet still has a certain magnetic property. The coercive force of NdFeB is generally above 11,000 Oe.
The value of the reverse magnetic field strength required to reduce the magnetic induction to zero when the magnet after the technical saturation magnetization is reversely magnetized is called the magnetic induction coercive force (Hcb). However, the magnetization of the magnet is not zero at this time, but the applied reverse magnetic field and the magnetization of the magnet cancel each other out. (The external magnetic induction performance is zero.) At this time, if the external magnetic field is removed, the magnet still has a certain magnetic property. The coercive force of NdFeB is generally above 11,000 Oe.
The intrinsic coercive force (Hcj) unit is A/m (A/m) and Oe (Oe)1 Oe≈79.6A/m
The magnetization of the magnet is reduced to zero. The magnitude of the applied reverse magnetic field is called the intrinsic coercivity. The intrinsic coercivity is a physical quantity that measures the anti-demagnetization ability of a magnet. If the applied magnetic field is equal to the intrinsic coercivity of the magnet, the magnetism of the magnet will be substantially eliminated. The Hcj of NdFeB will decrease with increasing temperature, so you should choose a high Hcj grade when you need to work in a high temperature environment.
The unit of magnetic energy product (BH) is Coke/m3 (J/m3) or high (GOe) 1 MGOe≈7. 96k J/m3
The product of B and H at any point on the demagnetization curve is both BH we call the magnetic energy product, and the maximum value of B x H is called the maximum energy product (BH)max. The magnetic energy product is one of the important parameters of the energy stored by the constant magnet. The larger the (BH)max, the larger the magnetic energy contained in the magnet. When designing the magnetic circuit, the working point of the magnet should be as close as possible to the B and H corresponding to the maximum magnetic energy product.
The magnetization of the magnet is reduced to zero. The magnitude of the applied reverse magnetic field is called the intrinsic coercivity. The intrinsic coercivity is a physical quantity that measures the anti-demagnetization ability of a magnet. If the applied magnetic field is equal to the intrinsic coercivity of the magnet, the magnetism of the magnet will be substantially eliminated. The Hcj of NdFeB will decrease with increasing temperature, so you should choose a high Hcj grade when you need to work in a high temperature environment.
The unit of magnetic energy product (BH) is Coke/m3 (J/m3) or high (GOe) 1 MGOe≈7. 96k J/m3
The product of B and H at any point on the demagnetization curve is both BH we call the magnetic energy product, and the maximum value of B x H is called the maximum energy product (BH)max. The magnetic energy product is one of the important parameters of the energy stored by the constant magnet. The larger the (BH)max, the larger the magnetic energy contained in the magnet. When designing the magnetic circuit, the working point of the magnet should be as close as possible to the B and H corresponding to the maximum magnetic energy product.
Isotropic magnet: A magnet with the same magnetic properties in any direction.
Anisotropic magnet: Magnetic properties vary in different directions; and there is one direction in which the magnet with the highest magnetic properties is obtained. The sintered NdFeB permanent magnet is an anisotropic magnet.
Anisotropic magnet: Magnetic properties vary in different directions; and there is one direction in which the magnet with the highest magnetic properties is obtained. The sintered NdFeB permanent magnet is an anisotropic magnet.
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