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US 10,381,155 B2Granted
Winding for low-voltage coils of distribution-class toroidal transformers
AssigneeNew York University
InventorsFrancisco De León, Saeed Jazebi
Life of this patent
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Abstract
A novel winding method is described herein which eliminates the circulating currents for wound transformers. A first layer of a wire is wound about the core at a first set of angles. Next, a loop is pulled to form slack in the wire and the wire is continued to be wound at a second set of angles. The loop provides sufficient slack for the cutting and connecting described further below. The winding and loop pulling continues for s sequences to achieve the desired winding. The wire is then cut at each loop.
Claims6
A method for winding a layer of a transformer comprising:
- determining a number (Np) of parallel conductors for the layer;
- determining a number (Nt,i) of turns per layer for each parallel conductor;
- beginning at a first terminal and leaving a first terminal end, winding a wire, and a first prime terminal end, about a transformer core at a first sequence of angles;
- forming a first loop of wire;
- winding the wire about the transformer core at a second sequence of angles;
- forming a second loop of wire;
- winding the wire about the transformer core at a third sequence of angles;
- cutting the first loop of wire to form a second terminal end and a second prime terminal end;
- cutting the second loop of wire to form a third terminal end and a third prime terminal end;
- connecting the first terminal end;
- the second terminal end and third terminal end;
- connecting the first prime terminal end, and the second prime terminal end, and the third prime terminal end;
- and
- wherein a first parallel conductor is defined by the first terminal end and second prime terminal end, a second parallel conductor is defined by the second terminal end and the third prime terminal end, and a third parallel conductor is defined by the third terminal end and the first prime terminal end.
11 more elements
A method for winding a transformer comprising:
- selecting a number of turns n for a winding in the transformer;
- determining a number of parallel conductors Np to substitute for the winding;
- determining a number of layers m for the transformer;
- for each layer m, defining a number of turns per layer Nt,i, and winding sequences s, wherein each sequence s of the parallel conductors Np has Nt,i, turns each at an angle θp,s defined by
- θ
- p
- ,
- s
- =
- 360
-
- °
- ×
- p
- N
- t
- ,
- i
- +
- s
- ×
- 360
-
- °
- N
- t
- ,
- i
- ×
- N
- p
- p
- =
- 0
- ,
- 1
- ,
- …
-
- ,
- (
- N
- t
- ,
- i
- -
- 1
- )
- s
- =
- 0
- ,
- 1
- ,
- …
-
- ,
- (
- N
- p
- -
- 1
- )
- where, θp,s is the angle corresponding to the pth turn of the Nt,i, total number of turns and the sth sequence of the Np total number of sequences;
- where s=Np for the last turn;
- between each of the Np sequences, pulling a loop;
- cutting each loop to form Np parallel conductors each having two terminal ends;
- connecting each parallel conductor of a layer in parallel;
- and
- connecting respective terminal ends of each layer in series.
67 more elements
Dependencies are inferred from the claim text.