permeance

per·me·ance

P0200900 (pûr′mē-əns)n. A measure of the ability of a magnetic circuit to conduct magnetic flux; the reciprocal of reluctance.

[From Latin permeāre, to penetrate; see permeate.]

permeance

(ˈpɜːmɪəns) n1. the act of permeating2. (General Physics) the reciprocal of the reluctance of a magnetic circuit. Symbol: Λ ˈpermeant adj, n

Translations

permeanza

permeance

enUK

Permeance

The reciprocal of reluctance in a magnetic circuit. It is the analog of conductance (the reciprocal of resistance) in an electric circuit, and is given by (1) Eq. (1), where B is the magnetic flux density, H is the magnetic field strength, and the integrals are respectively over a cross section of the circuit and around a path within it.

From Eq. (1), it can be shown that Eq. (2) is valid, where A (2) is the cross-sectional area of the magnetic circuit, l its length, and μ the permeability. If the material is ferromagnetic, as is often the case, then μ is not constant but varies with the flux density and the complete magnetization curve of B against H may have to be used to determine the permeance. See Reluctance

permeance

[′pər·mē·əns] (electromagnetism) A characteristic of a portion of a magnetic circuit, equal to magnetic flux divided by magnetomotive force; the reciprocal of reluctance. Symbolized P.

permeance

A measure of a material’s resistance to water-vapor transmission, expressed in perms. Equal to the ratio of (a) the rate of water vapor transmission through a material or assembly between its two parallel surfaces to (b) the vapor pressure differential between the surfaces.

单词	permeance
释义	permeance enUK per·me·ance P0200900 (pûr′mē-əns)n. A measure of the ability of a magnetic circuit to conduct magnetic flux; the reciprocal of reluctance. [From Latin permeāre, to penetrate; see permeate.] permeance (ˈpɜːmɪəns) n1. the act of permeating2. (General Physics) the reciprocal of the reluctance of a magnetic circuit. Symbol: Λ ˈpermeant adj, n Translations permeanza permeance enUK Permeance The reciprocal of reluctance in a magnetic circuit. It is the analog of conductance (the reciprocal of resistance) in an electric circuit, and is given by (1) Eq. (1), where B is the magnetic flux density, H is the magnetic field strength, and the integrals are respectively over a cross section of the circuit and around a path within it. From Eq. (1), it can be shown that Eq. (2) is valid, where A (2) is the cross-sectional area of the magnetic circuit, l its length, and μ the permeability. If the material is ferromagnetic, as is often the case, then μ is not constant but varies with the flux density and the complete magnetization curve of B against H may have to be used to determine the permeance. See Reluctance permeance [′pər·mē·əns] (electromagnetism) A characteristic of a portion of a magnetic circuit, equal to magnetic flux divided by magnetomotive force; the reciprocal of reluctance. Symbolized P. permeance A measure of a material’s resistance to water-vapor transmission, expressed in perms. Equal to the ratio of (a) the rate of water vapor transmission through a material or assembly between its two parallel surfaces to (b) the vapor pressure differential between the surfaces. MedicalSeepermeantAcronymsSeePERM
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