Permeance, PA/l###Gas Permeation Unit###6 cm3 (STP) / cm2 .
Permeance is measured in gas permeation units (GPU).
Eliminating the center rib would greatly increase torque but also create pockets of reduced
permeance, thus reducing the temperature of demagnetization.
In a similar way the
permeance for the air-gap leakage [P.sub.s] is calculated as
The airgap
permeance, accounting for stator and rotor slotting, can be approximated, expressed as follows [26]:
Figure 6 presents the effect of solvent/nonsolvent ratio in spinning dope on pure gas
permeance and ideal selectivity of MMHFM containing the functionalized MIL-53.
where M is water vapor
permeance (kg [Pa.sup.-1] [s.sup.-1] [m.sup.-2]) and [[DELTA]p.sub.wv] is the difference in water vapor pressure (Pa) across the specimen.
Air
permeance (porosity) is a measure of the extent to which a paper surface will allow the penetration of a gas or liquid such as air or ink through its surface.
where [[LAMBDA].sub.0] is the average air-gap
permeance. W = [w.sub.s]/[[delta].sub.0] is the dimensionless radial displacement of the stator core, and [[delta].sub.0] is the average eccentricity.
The
permeance of PM is close to air which is far greater than that of stator or rotor iron.
The magnetic force is proportional to the gradient of the
permeance ([??]) multiplied by the square of the "magnetomotive force" (essentially, the total applied Amp * turn product).