# US 12,183,506 B2 · Winding method for foil coil

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- Number: US 12,183,506 B2
- Document ID: US12183506B2
- Status: Granted
- Kind: B2
- Application number: 17/762,905
- Filed: 2021-11-10
- Published: 2024-02-15
- Granted: 2024-12-31
- Earliest claimed: 2021-08-31
- Assignees: Haihong Electric Co., Ltd.
- Applicants: Haihong Electric Co., Ltd.
- Inventors: Kaixuan Xu; Qingning Liang; Dengling Zhou; Shujing Zhang; Libo Zhou; Huilin Guan; Yixiong Liang
- Web page: https://patentgrep.com/patent/US12183506B2

## CPC

- H01F 41/06: Coil winding
- H01F 41/061: Winding flat conductive wires or sheets
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A winding method for a foil coil includes the following process steps of, step S1: fixing an iron core, and preparing a winding die; step S2: calculating a circumference of a foil needed by each layer of coil; step S3: making one size mark on the foil at every regular interval; step S4: arranging the foil on a winding device; step S5: fixing a start end of the coil, and arranging a reference point on a transformer; step S6: starting to wind the coil; step S7: checking whether the winding meets a preset standard requirement; and step S8: fixing a tail end of the coil.

## Claims

### Claim 1

A method for winding a foil to form a coil, comprising following process steps of:
step S1: fixing an iron core (1) onto a winding device, and then preparing a winding die (2), wherein the winding die (2) is of a hollow structure, and the winding die (2) is sleeved around a core post of the iron core (1);
step S2: measuring an actual size of each of the iron core (1), the winding die (2), a foil (3) and an insulating material arranged between every two layers of coil (4) eventually formed to prevent layer short circuit, and calculating a circumference of the foil (3) needed by each layer of coil (4) eventually formed;
step S3: making one size mark (5) on the foil (3) at every regular interval;
step S4: arranging the foil (3) on the winding device;
step S5: fixing a start end of the foil (3), and arranging a reference point (6) on the winding die (2);
step S6: starting to wind the foil (3), and when the reference point (6) being reached as a layer of the foil (3) being wound, measuring a distance between the foil at the reference point (6) and the mark (5) closest thereto, and calculating a circumference of the foil (3) actually wound up by the layer of foil (3);
step S7: comparing the circumference of the foil (3) actually wound up calculated in step S6 with the circumference of the foil (3) calculated in step S2, in response to a determination that a preset standard requirement is met, proceeding with winding, and in response to a determination that the preset standard requirement is not met, performing an adjustment until the preset standard requirement is met; and
step S8: after finishing winding, fixing a tail end of the coil (4) eventually formed on a preceding layer of the coil (4) to complete the coil (4).

### Claim 2 (depends on 1)

The method for winding the foil to form the coil as claimed in claim 1, wherein the winding die in step S1 comprises a left die, a middle die and a right die, and the middle die is connected between the left die and the right die.

### Claim 3 (depends on 1)

The method for winding the foil to form the coil as claimed in claim 1, wherein the interval in step S3 is ranged from 50 mm to 100 mm.

### Claim 4 (depends on 1)

The method for winding the foil to form the coil as claimed in claim 1, wherein the reference point (6) in step S5 is arranged at a start end of the coil (4) eventually formed.

### Claim 5 (depends on 1)

The method for winding the foil to form the coil as claimed in claim 1, wherein the standard requirement in step S7 is ranged from 0 mm to 3 mm.