User Tools
magnetic_permeability
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
magnetic_permeability [2020/03/07 16:27] stan_zurek [Magnetic permeability] |
magnetic_permeability [2020/12/07 00:08] (current) stan_zurek |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| + | ====== Magnetic permeability ====== | ||
| + | |< 100% >| | ||
| + | | // | ||
| + | |||
| + | |||
| + | |||
| + | **Magnetic permeability**, | ||
| + | |||
| + | {{page> | ||
| + | |||
| + | <box 30% right #f0f0f0> | ||
| + | Permeabilities of [[magnetic material|magnetic materials]] (e.g. [[ferromagnets]]) are much higher than those of [[non-magnetic material|non-magnetic materials]] (e.g. [[permeability of free space|vacuum]], | ||
| + | [[file/ | ||
| + | {{page> | ||
| + | </ | ||
| + | |||
| + | [[Permeability of free space]] (or vacuum) is a universal physical constant defined in the [[international system of units]] (SI) denoted as $μ_0$ and its value defined exactly[(Jiles)][(BIPM_mu0> | ||
| + | |||
| + | The term " | ||
| + | |||
| + | ===== Practical significance of permeability ===== | ||
| + | From a practical viewpoint permeability is one of the basic parameters which allows categorising all materials as " | ||
| + | |||
| + | | (1) | $$B = μ · H$$ | (T) | | ||
| + | |||
| + | [[Ferromagnet|Ferromagnetic]] and [[ferrimagnet|ferrimagnetic]] materials have their permeabilities significantly greater than vacuum and are used for construction of [[magnetic core|magnetic cores]] in [[magnetic circuit|magnetic circuits]]. | ||
| + | |||
| + | However, at sufficiently high excitation all magnetic materials exhibit [[magnetic saturation]], | ||
| + | |||
| + | <box 30% right #f0f0f0> | ||
| + | Permeability of [[ferromagnetic material|ferromagnetic materials]] is a non-linear function of the applied excitation and reduces when approaching saturation | ||
| + | [[file/ | ||
| + | {{page> | ||
| + | </ | ||
| + | |||
| + | |||
| + | |||
| + | ===== Types of permeability ===== | ||
| + | |||
| + | There are several types of magnetic permeability: | ||
| + | |||
| + | ==== Names ==== | ||
| + | * [[absolute permeability]] | ||
| + | * [[AC inductance permeability]] | ||
| + | * [[amplitude permeability]] | ||
| + | * [[apparent permeability]] | ||
| + | * [[bulk permeability]] | ||
| + | * [[complex permeability]] | ||
| + | * [[DC permeability]] | ||
| + | * [[differential permeability]] | ||
| + | * [[dynamic permeability]] | ||
| + | * [[effective permeability]] | ||
| + | * [[equivalent permeability]] | ||
| + | * [[free space permeability]] | ||
| + | * [[ideal permeability]] | ||
| + | * [[imaginary permeability]] | ||
| + | * [[impedance permeability]] | ||
| + | * [[impulse permeability]] | ||
| + | * [[incremental permeability]] | ||
| + | * [[initial permeability]] | ||
| + | * [[intrinsic permeability]] | ||
| + | * [[linear permeability]] | ||
| + | * [[magnetic constant]] | ||
| + | * [[maximum permeability]] | ||
| + | * [[non-linear permeability]] | ||
| + | * [[peak permeability]] | ||
| + | * [[post-saturation permeability]] | ||
| + | * [[pulse permeability]] | ||
| + | * [[quasi-permeability]] | ||
| + | * [[quasi-static permeability]] | ||
| + | * [[real permeability]] | ||
| + | * [[recoil permeability]] | ||
| + | * [[relative permeability]] | ||
| + | * [[return permeability]] | ||
| + | * [[reversible permeability]] | ||
| + | * [[saturation permeability]] | ||
| + | * [[scalar permeability]] | ||
| + | * [[tensor permeability]] | ||
| + | * [[universal magnetic constant]] | ||
| + | * [[vacuum permeability]] | ||
| + | * [[vector permeability]] | ||
| + | |||
| + | ==== Symbols ==== | ||
| + | * [[μ|$μ$]] | ||
| + | * [[μ0|$μ_0$]] | ||
| + | * [[μ0.08|$μ_{0.08}$]] | ||
| + | * [[μ0.4|$μ_{0.4}$]] | ||
| + | * [[μ4|$μ_4$]] | ||
| + | * [[μ4z|$μ_{4z}$]] | ||
| + | * [[μ5z|$μ_{5z}$]] | ||
| + | * [[μ_a|$μ_a$]] | ||
| + | * [[μ_core|$μ_{core}$]] | ||
| + | * [[μ_e|$μ_e$]] | ||
| + | * [[μ_eff|$μ_{eff}$]] | ||
| + | * [[μ_gap|$μ_{gap}$]] | ||
| + | * [[μ_i|$μ_i$]] | ||
| + | * [[μ_m|$μ_m$]] | ||
| + | * [[μ_max|$μ_{max}$]] | ||
| + | * [[μ_max_cc|$μ_{max\; | ||
| + | * [[μ_max_dc|$μ_{max\; | ||
| + | * [[μ_p|$μ_{p}$]] | ||
| + | * [[μ_p_max|$μ_{p\; | ||
| + | * [[μ_r|$μ_r$]] | ||
| + | * [[μ_rev|$μ_{rev}$]] | ||
| + | * [[μ_s|$μ_s$]] ($μ_s' | ||
| + | * [[μz8|$μ_{z8}$]] | ||
| + | * [[μ complex|$\bar{μ}$]] (μ complex) | ||
| + | * [[mu]] | ||
| + | |||
| + | ===== References ===== | ||
| + | ~~REFNOTES~~ | ||
| + | |||
| + | {{tag> | ||
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution 4.0 International
