Air-Core Coils
Air-core coils represent a special solution for electrical applications that require precise inductances without the use of magnetic cores. The use of air-core inductors is necessary where an extremely linear behavior of the inductor is desired even at high currents. The absence of the magnetic core and related losses due to hysteresis and eddy currents means that the losses of air-core coils are reduced, especially at high frequencies. Braga Trasformatori specializes in the manufacture of this type of coils, guaranteeing high geometric precision and constant electrical characteristics.
Coils are made with copper or aluminum conductors, available in different formats (wire, flat wire, sheet) and can be configured with internal and external dimensions and number of turns according to specific customer requirements. The production process includes resin impregnation, which guarantees mechanical stability, humidity resistance and better electrical insulation. It is possible to perform edge-wound flat wire winding.
The main applications are:
- Resonant and tuning circuits
- Induction heating equipment
- Wireless power transfer systems
- Scientific and laboratory instrumentation
- RF filters and communications applications
- Medical equipment
- Testing and measurement systems
- Aerospace applications
- Special sensors and actuators
- Components for wireless charging systems
Technical Specifications
| Parameter | Specifications |
|---|---|
| Type | Air-core coils |
| Conductor materials | Copper or aluminum |
| Available shapes | Wire, flat wire, sheet |
| Inner diameter | According to customer specifications |
| Outer diameter | According to customer specifications |
| Number of turns | Customizable |
| Treatments | Resin impregnation |
| Inductance | From few μH to hundreds of mH |
| Nominal current | According to sizing |
| Temperature class | H (180°C) |
| Cooling | AN (natural air) |
| Protection degree | IP00 (standard) or higher on request |