Magnetic permeability in the magnetic permeability

What does "permeability" mean Magnetic permeability, English Name: magnetic permeability, represents the physical quantity of magnetic medium. It refers to the resistance to generate magnetic flux or its ability to conduct magnetic lines of force in a magnetic field after a current flows through a coil in space or in magnetic core space. Its formula μ= B / h, where h = magnetic field strength, B = magnetic induction strength, common symbols μ express, μ Is the permeability of the medium, or absolute permeability. Permeability function The permeability measurement is an indirect measurement. The inductance of the winding coil on the magnetic core is measured, and then the permeability of the magnetic core material is calculated by the formula. Therefore, the permeability test instrument is the inductance tester. It is emphasized that for some simple inductance test instruments, the test frequency and test voltage cannot be adjusted. For example, for some bridges, the test frequency is 100Hz or 1kHz and the test voltage is 0.3V. The given 0.3V is not the voltage at both ends of the inductance coil, but the voltage generated by the signal generator. The voltage across the coil under test is unknown. If high-grade instruments are used to measure inductance, such as Agilent 4284A precision LCR tester, not only the test frequency is adjustable, but also the voltage and magnetization current at both ends of the measured inductance coil are adjustable. Understanding these functions of the test instrument is very helpful for the correct measurement of permeability. Permeability unit In the international system of units (SI), the relative permeability μ R is a dimensionless pure number, permeability μ The unit of is Henry / meter (H / M). Common vacuum permeability:, read the full text“

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