PERMANENT MAGNET BODY CONSISTING OF PLASTIC COMBINING MAGNETIC MATERIAL, ITS MANUFACTURE AND EDDY CURRENT TACHOMETER WITH SAID PERMANENT MAGNET BODY

摘要

A finely distributed compensation material is provided in a permanent-magnet body made from a composition of plastics and magnetic material of low permeability. This compensation material can be added to the material during the production of the permanent-magnet body. A particularly favourable configuration is obtained for an eddy-current tachometer when it has a permanent-magnet body according to the invention.