Incidentally, depending on what power you need, you may be surprised what inductors you can 'get away with'. So you have a target! Play with a simulator for what you do have (if you can) and then do some experiments. since I can't obtain the required inductors. Which is why you'll only ever see enamel covered wire used in commercial PSUs. transformers for inverters), traction current, charging. Plastic insulation melts quite easily: that leads to shorts and more heating, and you have a runaway thermal situation pretty quickly. Large Ferrite cores are used in many fields of power electronics such as solar technology (e. That means there's a fair bit of peak heating. There's a fair bit of peak current through your inductor.

Would using multi-stranded plastic-insulated wire be a good idea? You can use a modelling tool to get a ballpark. But in the real world they only ever give you guidelines: the exact core material will vary, as will your turn spacing, air gapping, atmospheric moisture content, etc. There isn't a single 'formula', but those models are using some pretty well tested maths. There are models, and some useful tools for some ferrite/powdered iron cores. The default values are for the coverage of the SW frequency range of 1700 kHz to 30000 kHz, utilising a 224 pF variable capacitor.

This calculator will find the inductance value of the short wave (SW) radio coil required for building a ferrite rod antenna given the value of the variable capacitor. Is there a formula for saturation current? Calculator for Short Wave (SW) Radio Coil.

Ferrite coil calculator inverter