Internal data of magnetic components Magnetic materials are composed of ferromagnetic or ferrimagnetic materials. Under the action of an external magnetic field H, there must be a corresponding magnetization intensity M or magnetic induction intensity B. The curve of their change with the magnetic field intensity H is called the magnetization curve (M~H or B~H curve). The magnetization curve is generally nonlinear and has two characteristics: magnetic saturation phenomenon and hysteresis phenomenon. That is, when the magnetic field intensity H is large enough, the magnetization intensity M reaches a certain saturation value Ms. If H continues to increase, Ms remains unchanged; and when the M value of the material reaches saturation, when the external magnetic field H is reduced to zero, M does not return to zero, but changes along the MsMr curve. The working state of the material is equivalent to a point on the M~H curve or the B~H curve, which is often called the working point
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