System for wrapping transformer cores from amorphous metal strips
AssigneeABB AB
InventorMark E. Rand
Life of this patent
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Abstract
An amorphous magnetic core is produced by wrapping cut strips of amorphous metal about a mandrel to form a distributed gap core. The cut strips are secured to the mandrel during assembly by wrapping the strips with amorphous metal ribbons that have been weakened in predetermined areas but not fully parted. After the core has been built to its desired size, the weakened ribbons are completely parted. This method of making an amorphous magnetic core produces a tightly wound distributed gap core without the need for a belt winder or specialized strip holding devices.
Claims17
A system for wrapping transformer cores, comprising:
- cut strips of amorphous metal;
- a ribbon spool having a supply of amorphous metal ribbon;
- a wrapping mandrel situated relative to said cut strips and said ribbon spool so that as said wrapping mandrel rotates, a first plurality of said cut strips are applied to said wrapping mandrel, a first length of said amorphous metal ribbon from said ribbon spool is applied over said first plurality of said cut strips, a second plurality of said cut strips is applied over said first length of said amorphous metal ribbon, and a second length of said amorphous metal ribbon from said ribbon spool is applied over said second plurality of said cut strips.
A machine for wrapping a transformer core having a joint region, comprising:
- means for providing amorphous metal fully cut strips;
- means for providing an amorphous metal ribbon;
- means for weakening said amorphous metal ribbon at appropriate locations;
- and
- means for wrapping a first plurality of said amorphous metal fully cut strips around a mandrel, wrapping said amorphous metal ribbon over said first plurality of said amorphous metal fully cut strips, wrapping a second plurality of amorphous metal fully cut strips over said amorphous metal ribbon, and wrapping said amorphous metal ribbon over said second plurality of said amorphous metal fully cut strips.
Dependencies are inferred from the claim text.