Magnetic impedance

Magnetic impedance (SI Unit: -Ω⁻¹) is the ratio of a sinusoidal magnetic tension $N_\mathrm{m}$ to a sinusoidal magnetic current $I_\mathrm{Mm}$ in a gyrator-capacitor model. Analogous to electrical impedance, magnetic impedance is likewise a complex variable.

$z_\mathrm{M} = \frac{N}{I_\mathrm{M}} = \frac{N_\mathrm{m}}{I_\mathrm{Mm}}$

Magnetic impedance is also called the full magnetic resistance. It is derived from:

$r_\mathrm{M} = z_\mathrm{M} \cos \phi$, the effective magnetic resistance (real)

$x_\mathrm{M} = z_\mathrm{M} \sin \phi$, the reactive magnetic resistance (imaginary)

The phase angle $\phi$ of the magnetic impedance is equal to:

$\phi = \arctan {\frac{x_\mathrm{M}}{r_\mathrm{M}}}$

See also

• Magnetic complex impedance

References

• Pohl R. W. ELEKTRIZITÄTSLEHRE. – Berlin-Göttingen-Heidelberg: SPRINGER-VERLAG, 1960.
• Popov V. P. The Principles of Theory of Circuits. – M.: Higher School, 1985, 496 p. (In Russian).
• Küpfmüller K. Einführung in die theoretische Elektrotechnik, Springer-Verlag, 1959.