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Air
Coils Using Flat Helical Windings
Thickness: From 0.3mm ( 0.012" or 12 mils) to 2.5mm ( 0.09"
or 90 mils)
Width : From 0.6mm ( 0.023") to 7.5mm ( 0.3")
Flat
Helical windings are popular in application where a high stacking
ratio is required. It has good thermal properties and low skin
effects in high frequency applications due to large surface area
and shallow skin depth.
It
is commonly used in high current inductors, common mode chokes,
differential
mode chokes, power factor correction inductors and transformers.
Other application includes motor windings, etc.
Since
each helical winding is custom made, a tooling fee is required
for all special sizes. However, if the volume is large. We will
amortize the cost of the tooling in the unit price. The insulation
used are class 200 deg C or class 155 deg C.
The
following are some standard sizes in mm ( thickness x width).
Please contact us for other sizes.
| 0.03
x 0.6 |
0.20
x 1.15 |
0.25
x 1.8 |
0.40
x 2.3 |
0.35
x 2.5 |
1.80
x 4.5 |
| 0.08
x 1.0 |
0.50
x 1.15 |
0.30
x 1.8 |
0.10
x 2.4 |
0.50
x 2.5 |
0.30
x 5.0 |
| 0.10
x 1.0 |
0.14
x 1.20 |
0.40
x 1.8 |
0.20
x 2.4 |
0.33
x 2.6 |
0.50
x 5.0 |
| 0.12
x 1.0 |
0.40
x 1.20 |
0.50
x 1.8 |
0.24
x 2.4 |
0.20
x 3.0 |
0.70
x 5.0 |
| 0.15
x 1.0 |
0.25
x 1.25 |
0.60
x 1.8 |
0.30
x 2.4 |
0.55
x 3.0 |
1.50
x 5.65 |
| 0.18
x 1.0 |
0.30
x 1.50 |
0.70
x 1.8 |
0.40
x 2.4 |
0.70
x 3.0 |
0.40
x 6.0 |
| 0.20
x 1.0 |
0.40
x 1.50 |
0.20
x 2.0 |
0.50
x 2.4 |
1.45
x 3.2 |
1.00
x 6.0 |
| 0.30
x 1.0 |
0.55
x 1.72 |
0.30
x 2.0 |
0.60
x 2.4 |
1.36
x 3.9 |
1.50
x 6.0 |
| 0.50
x 1.0 |
0.20
x 1.75 |
0.40
x 2.0 |
0.70
x 2.4 |
0.31
x 4.1 |
0.90
x 7.0 |
| 0.70
x 1.0 |
0.40
x 1.75 |
0.50
x 2.0 |
0.80
x 2.4 |
1.73
x 4.1 |
1.00
x 7.0 |
| 0.80
x 1.0 |
0.10
x 1.8 |
0.60
x 2.0 |
1.20
x 2.4 |
0.25
x 4.5 |
2.50
x 7.5 |
Low cost, million pieces volume windings are done at our Asian
facility.
See
below for examples of custom coil windings. Please call CWS for
your requirements - high quality work at a reasonable tooling
cost and low cost volume production.
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