Magnetic impedance

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Magnetic circuits

Conventional magnetic circuits

Phasor magnetic circuits

Related concepts

Gyrator-capacitor model variables

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

z_M = \frac{N}{I_M} = \frac{N_m}{I_{Mm}}

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

r_M = z_M \cos \phi, the effective magnetic resistance (real)
x_M = z_M \sin \phi, the reactive magnetic resistance (imaginary)

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

\phi = \arctan {\frac{x_M}{r_M}}

See also[edit]

References[edit]

  • 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.