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# Magnetic impedance

Magnetic Circuits

Conventional Magnetic Circuits
• Magnetomotive force $\mathcal F$
• Magnetic flux Φ
• Magnetic reluctance $\mathcal R$

Phasor Magnetic Circuits

Related Concepts

Gyrator-capacitor model variables
This box:

Magnetic impedance (SI Unit: -Ω−1) is the ratio of a sinusoidal magnetic tension Nm to a sinusoidal magnetic current IMm 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:

rM = zMcos ϕ, the effective magnetic resistance (real)
xM = zMsin ϕ, the reactive magnetic resistance (imaginary)

The phase angle ϕ of the magnetic impedance is equal to: $\phi = \arctan {\frac{x_M}{r_M}}$

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