Single magnet in fact it is not difficult to understand, simply say there is a magnetic, magnetic weaker magnet on the other side, the method is to use special processing of galvanized sheet will double magnet wrapped the bread, so wrapped side will be magnetic shielding, magnetic force is shifted to the other side, the other side magnetism will increase.
Single magnet analysis of the three angles: according to the principle of refraction, arc material effect is best, right Angle larger refraction material losses if some places need only one side of magnetic, can cause damage or interfere with the other side, such as magnetic;
Magnets on some occasions, need only one side of magnetic, dispensable, on the other side of magnetic also useless, so using a single magnetic will greatly reduce the cost and save magnetic materials.
The selection of materials: materials and thickness, and the magnet and the spacing of materials have a close relationship.
Pure iron easy leakage, refraction increased after special treatment, but 100% of shielding materials haven't worked out, but different manufacturer of single magnet material effect is also different