Rotating-armature transformer with concentric magnetic cores - has two cylindrical mild steel sections with accurately machined rims moving adjacent to cylindrical walls

摘要

The transformer is constructed of two concentric sections (1,2) made up of a magnetic material such as soft iron. The external section (1) is of cylindrical section (5) with a lateral rim (4). It presents a circular edge (12) to the wall of the internal section (2). The internal section has a rim (16) at one end whose edge (20) faces the internal wall of the outer section. The gaps (27,28) between the facing magnetic pieces allow a play of 0.3 mm. The faces are machine - corrected to a tolerance of 0.05mm. Coils are mounted co-axially with the two magnetic sections on the internal and external walls of the external and internal sections respectively. The coils can be wound and mounted separately. In one possible arrangement, the coils consist of layered copper wire layered in a thermo-setting resin. The cylindrical magnetic sections are mounted independently on the drive axis.