Aluminium Foil Transformer

Higher productivity of transformers handling larger currents
For conductors with larger cross section, the inherent flexibility of foils will enable easy winding, which in turn will enhance productivity in manufacture.

Greater insulation reliability
In foil wound transformer, the voltage gradient between layers is the voltage gradient per turn. This reduces the strain on the inner layer insulation and increases reliability.

Enhanced ability to withstand short circuit currents
Improved balance between magnetic fluxes of primary and secondary windings enhances the capability of Aluminium foil transformers to withstand short circuits, rendering them superior to wire wound or strip wound transformers.

Increased thermal stability and higher short-term over load capacity
The layer type winding in Aluminium foil provides a larger surface area for cooling. Since the heat gets efficiently transferred from the inner layers to the outer layers, the winding achieves thermal stability in a very short time.

This, plus the fact that the specific heat of aluminium is greater than copper, helps in preventing burn-outs due to hot spots and makes the transformer withstand higher short-term over loads.

TECHNICAL ADVANTAGES

We, M. R. Electricals, are manufacturersof Power Conditioning equipmentand Instrumentation and Control equipment for energy management. Our products are marketed under the brand NIYANTAN. In the year 2000, we have gone for a Aluminium foil winding machine and know how for Aluminium foil wound transformers from the market leader with a market share of over 30 % in southern and western India, M/S Alacrity Electronics Ltd. They market market their products under the brand KRYKARD.

As our power conditioning range of products had high copper content, the possibility of reducing our dependance on copper due to its relative high cost price instability was considered. This resulted in our using Aluminium foil wound transformers in place of copper wire wound one.

The Aluminium foil wound transformers developed by Alacrity Electronics Ltd. Have been successfully used in Stabilizers and Isolation Transformers manufactured by them and about 60,000 of these are working on the field since 1992.

INTRODUCTION