WOUND TRANSFORMER CORE AND METHOD OF MANUFACTURE

摘要

In a single phase transformer core and transformer, thin-strip metal is wound into multiple rings of different widths and arranged to define a ring-like structure having a stepped, substantially circular cross-section without any cuts or gaps in the magnetic path, or the core is wound from a tapered strip that is configured to define a substantially circular cross-section when wound, while in a three phase transformer core and transformer two inner frames, each made of one or more wound rings are arranged side-by-side and an outer frame of one or more rings is wound around the two inner frames, the core being covered with epoxy prior to winding coils on it.

主权项

1. A method of making a thin-strip metal transformer core for a transformer, comprising
winding one or more rings, each ring formed by winding multiple turns of continuous thin-strip metal, wherein the thin-strip metal is controlled so that the turns lie one on top of the other with the center line of the strip for each turn aligned in a plane; configuring the one or more rings to define two or more straight core legs having a substantially circular cross-section, and freezing the core by applying an epoxy or other shell to the outer surfaces of the core before applying any transformer coil windings.