one: English: Magnetic energy product
Two: definition: in the curve of B demagnetization of permanent magnetic materials on (two quadrant), different point corresponds to a magnet in the different working state, the B demagnetization curve at a point corresponding to the Bm and Hm (the abscissa and ordinate) representing the magnet in this state, the magnet magnetic sense the strength and the magnitude of the magnetic field, the absolute value of the product of Bm and Hm (BmHm) represents the magnet under the state of foreign capacity for doing work, equivalent magnetic energy stored in the magnet, called magnetic energy product.
Three point Br in B and bHc's on the demagnetization curve, magnet (BmHm) =0, said at the magnet external work ability is 0, namely the magnetic energy product is 0; the magnet in a state (BmHm) the value of the largest, said at the time the largest magnet external work ability, known as the maximum energy of the magnet the product, or magnetic energy product, denoted as (BH) max or (BH) M. Therefore, people usually like to magnets in the product state can work in the maximum energy.
Four: energy product unit in the SI system for J/m3 (joules / m3), in the CGS system for the MGOe (Zhao Gao Auster), 100/4 J/m3=1 MGOe pi. |
