Pre-insulated copperfoils for shielding and winding
Laminated foil strip conductors
Screening tapes with partial or full insulation are used for static screening in transformers or as windings "wires" with optimal use of available space for high efficent transformers.
Copper thickness 0.030mm to 0.400mm possible (upon inquiry up to 1mm). The technical values of the insulation foils correspond to the data in our catalogue. All version are UL-certified (E93622).
Some of the main advantages:
- Reduces the necessary cross section of copper because of optimal shape in comparison to round wires.
- Ease of getting admittance for a winding construction due to the optimal safey
- UL listed materials for class B, F and H available
- Reduced skin-effect (high amp and high frequency), much more reliable due to reduction of vibration, interlayer-potential differenz, better thermal conductivity and higher ampacity.
- Prevents danger of short circuit between pimary and secondary windings
Drawing | Polyester | Nomex® | Kapton® | PEN | 1-/2- side insulation foil |
| CMC 38181 | CMC 38281 | CMC 38381 | CMC 38481 | single insulation |
| CMC 38191 | CMC 38291 | CMC 38391 | CMC 38491 | single insulation |
| CMC 38182 | CMC 38282 | CMC 38382 | CMC 38482 | single insulation |
| CMC 38190 | CMC 38290 | CMC 38390 | CMC 38490 | single insulation |
| CMC 38193 | CMC 38293 | CMC 38393 | CMC 38493 | double insulation |
| CMC 38192 | CMC 38292 | CMC 38392 | CMC 38492 | single insulation |
| CMC 38194 | CMC 38294 | CMC 38394 | CMC 38494 | double insulation |
Describtion
- CMC 38x81 backed conductor
Metal foil is laminated together with an insulation layer. - CMC 38x90 cuffed conductor
The insulation layer is folded around the metal foil material, leaving an open area on one side (soldering cleft). Very easy soldering of wires to the metal foil - CMC 38x94 enclosed cuffed conductor
Completely closed by folding the insulation layer around the copper with a small area of overlapping - CMC 38x82 enclosed backed conductor
Totally enclosed by a film layer on each side (overlapping of insulation layers min. 1mm)
Advantages of flat winding conductors
- Considerable lower skin effect below 100 kHz
- Well conductivity in comparison to the needed space
- Flat inductive reactance between 5 Hz to 50 kHz
- Highest power density. Due to the flat shape it is possible to wind e.g. inductores with a high winding tension and a low ratio of “lost volume” compaired to standard wire-wound coils. Together with the low skin-effect and the good conductivity it is possible to have a much higher power - density (ratio of conductor cross area to totally needed cross-section)
- low mechanical vibration caused by e.g. AC-currents at 50/60 Hz or frequencies under 10.000 Hz
All version UL-recognized E93622
All tapes comply with the RoHS and WEEE guidelines!
For foil wound transformers, inductors, chokes, reactors, buck inductors etc.
Transformers can be insulating or isolating transformers. These terms are used to describe the "electrical isolation" of the primary and secondary windings, or insulation between the two. Often an electrostatic copper shield (CMC38xxx) provides a safety factor preventing accidental contact between windings under faulty conditions. The insulated copper film inductors are also called Cuffed Conductor, Enclosed Backend Conductor, Backend Conductor, Jacketed Conductor, Enclosed Cuffed Conductor, Sandwiched Conductors. Used for foil wound welding trasformers, foil wound high frequency coils with strip foil conductors, or chokes, reactors and buck inductors.
This information and our technical advice – whether verbal, in writing or by way of trials – are given in good faith but without warranty, and this also applies where proprietary rights of third parties are involved. Our advice does not release you from the obligation to check its validity and to test our products as to their suitability for the intended processes and uses.
