Shin-Etsu Rare Earth Magnets

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Maximum energy product

This is an index expressing the performance of a permanent magnet. The units are the joule per meter cubed [J/m³] for SI units and the gauss oersted [GOe] for CGS units and the maximum energy product is expressed as (BH)max. The product of H (taken as positive) and B at the point (H, B) on the B-H demagnetization curve is called the energy product and the maximum value of this product is the maximum energy product. This value shows a yardstick for the maximum amount of magnetic flux taken out from the magnet per unit volume. When a magnetic circuit is designed to come to the maximum energy product point, the magnet volume can be made smallest.

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Glossary list