Stabilisation of magnetic flux in magnetic motor

摘要

Electric motor comprises armature and a yoke. A factor "alpha" is expressed as the ratio of magnetic flux through the permanent magnets (AmBm) divided by the magnetic flux through the yoke (AyBy) under the condition that the magnetic flux density through the yoke is satd. at room temp. The factors Am and Ay are resp. the effective cross-sectional area of the magnet and the yoke and Bm and Bys are the density through magnet and yoke. The feature is that the factor "alpha" has a value of 1-5, (1-20). The permanent magnet used is pref. based on ferrite or a rare earth alloy, pref. contg. Nd.