Rare Earth Magnet Basics / Glossary of Magnet Terms / Permeance coefficient
- Permeance coefficient
- A coefficient determined by the magnetic circuit and the shape of the magnet. If the permeance coefficient is p, the magnet's working point is the intersection of a straight line (the permeance line) drawn from the origin and having a slope of μ0p and the B-H demagnetization curve. The permeance coefficient is used in designing magnetic circuits. For a stand-alone magnet, if the magnet is shaped long and fine in the magnetization direction, the permeance coefficient found setting H positive is larger.
