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METHOD OF MANUFACTURING A TRANSFORMER COIL WITH A DISPOSABLE WRAP AND BAND MOLD AND INTEGRATED WINDING MANDREL
METHOD OF MANUFACTURING A TRANSFORMER COIL WITH A DISPOSABLE WRAP AND BAND MOLD AND INTEGRATED WINDING MANDREL
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机译:带有一次性卷带模和集成绕线模的变压器线圈的制造方法
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摘要
A method of manufacturing transformer windings embedded in casting resin is disclosed which utilizes an integrated winding mandrel for producing a non-standard oval shaped epoxy encapsulated low voltage coil for dry type distribution transformers. The method includes a process of winding a low voltage coil of alternate layers of copper conductor (24) and insulating tape (26), over a disposable mold formed by wrapping steel sheet material over inner mold support plates (14), the formed mold acting as both a winding mandrel and as an inner mold (20) for epoxy encapsulation. Both the inner and outer molds are made of low cost sheet metal utilizing a "wrap and band" process. The complete winding and molding processes can all be conducted utilizing a conventional square mandrel shaft (12) on a standard coil winding machine (10).
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