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US 11,961,656 B2Granted
Method of manufacturing a current transformer
AssigneeSchweitzer Engineering Laboratories, Inc.
InventorsTimothy M. Minteer, Eric M. Sawyer, David Kenny
Life of this patent
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Abstract
A current transformer includes a pre-formed core forming a closed loop with a flexible axially wound secondary winding. A continuous length of wire is axially coiled around a flexible bobbin to form a secondary winding. The resulting secondary winding may be slid onto the closed loop of the pre-formed core. The flexibility of the axially wound secondary winding facilitates conformity to a non-linear shape of the pre-formed core.
Claims12
A method of manufacturing a current transformer comprising:
- providing a pre-formed core by shaping a core to form a loop;
- obtaining a flexible bobbin comprising a duct extending through the flexible bobbin;
- axially winding a wire around the flexible bobbin to form a secondary winding;
- and
- sliding the secondary winding, onto the pre-formed core, wherein the pre-formed core is inserted through the duct of the flexible bobbin and the secondary winding conforms to a shape of the pre-formed core.
2 more elements
A method of manufacturing a current transformer comprising:
- providing a pre-formed core by shaping a core to form a loop with at least two transverse flat regions coupled by a curve;
- obtaining a flexible bobbin comprising a duct extending through the flexible bobbin;
- axially winding a continuous length of wire around the flexible bobbin to form a secondary winding;
- and
- placing the secondary winding onto at least a portion of the pre-formed core, wherein the pre-formed core is inserted through the duct of the flexible bobbin and the secondary winding conforms to a shape of the pre-formed core with a first end and a second end of the secondary winding positioned at an equivalent chord of an elliptical shape, the flexible bobbing comprising a winding track, the flexible bobbin conforming to a shape of the pre-formed core.
2 more elements
Dependencies are inferred from the claim text.