Magnetic ring for free piston rectilinear generators

摘要

The generator comprises at least one coil surrounded by a magnetic circuit of an inductor for taking-off electrical power. The magnetic circuit forms a variable gap with a reciprocating mobile part moving between two positions. The mobile reciprocating part is made in the form of a magnetic ring made by sheets of ferro-magnetic material having a uniform thickness and width and being radially positioned. The distance between the sheets at the proximity of a residual gap is such that ferro-magnetic material in area of the residual gap represents from 50 to 80% of the sheets in the magnetic circuit of the inductor.