So it appears the thinnest traces (0.1mm) with 70 turns is actually preferable. I appears that the inductance / resistance ratio is My maximum diameter is 30mm so by varying the trace width I can choose from the following optionsĠ.1mm trace width, 70 turns, inductance = 47uH and 1.55ohms resistance.Ġ.2mm trace width, 45 turns, inductance= 20uH and 0.48ohms resistance.Ġ.3mm trace width, 35 turns, inductance= 12uH and 0.25ohms resistance.Ġ.4mm trace width, 28 turns, inductance = 7.6uH and 0.15 ohms resistance. I found this trace calculator which lets me estimate the resistance. Audaphon air coils L7 L10 L13 core coils M12 M14 Mundorf Luft L100 L140 H. Is there any way to estimate the given the expected resistance? Cores made of ferromagnetic materials to increase coil inductance show two. ‘l’ is the length of the coil specified in inches. My copper is only 35um per side (2oz/CuFt) which means the resistance is substantially higher than the wire diameter suggests. L d2 n2 / 18d + 40l Where’ L ‘ is the inductance in Micro Henries µH ‘d’ is the diameter of the coil from one wire centre to another wire centre. I’m also using this excellent Kicad footprint wizard ( ) So being able to try out parameters before ordering the boards is incredibly useful. I’m making this on FPC (flex pcb), 2 layers. Modeling Core LossModeling Core Loss Thin-filmalloysandlaminations:film alloys and laminations: Classical eddy-current AthighfrequencywiththinAt high frequency, with thin dielectric, capacitance may allow additional eddy current (Yao 2009) Hysteresis loss Anomalous loss: model based on domain-wall motion. Thank you for making such a fantastic website! I’ve just noticed that the calculator also allows me to enter the coupling capacitance. Musical Tesla Coil Interrupter for SSTC/DRSSTC.The following is a design tool which calculates the inductance of an air core inductor. Busbar and primary circuit design for Tesla coils and inverters Air Core Inductor Coil Inductance Calculator.
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