Shin-Etsu Rare Earth Magnets

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Magnetic resistance

This is the quantity in a magnetic circuit that corresponds to the resistance in an electric circuit. It is also called the reluctance. In a ring magnetic circuit with a magnetic permeability of μ, cross-section area S, and length L, if the current penetrating the ring is I and the magnetic flux within the ring body is φ, the relationship I=φL/μS is established. Comparing this to an electric circuit, the magnetomotive force I [A] corresponds to the electromotive force, the magnetic flux φ[Wb] passing through the magnetic circuit corresponds to the current, and Rm=L/μS corresponds to the electrical resistance and is called the magnetic resistance.

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Glossary list