![]() NaN means not a number, check the input values. SVN: toroid.htm The calculator does not do a lot of error checking, if you enter nonsense, it will produce nonsense. The calculators below can be used to determine the proper parameters for either a circular or square cross section Toroid inductor. Credit for the initial Javascript code used in the calculator is given to Ray Allen who has a number of similar useful calculators on his website, Pulsed Power Portal. This calculator estimates the impedance and equivalent series inductance of rectangular cross section ferrite toroid cored inductors at HF. Where N is the number of turns, h is the height of the winding (in cm), r 1 is the inner radius (in cm), and r 2 is the outer radius (in cm). ![]() ![]() ) of the inductor, but it all cases, higher permeability means more inductance per turn of wire. Voltage Divider Calculator 1 (Fixed) Voltage Divider Calculator 2 (Adjusteable) Capacitors. The complete equations to calculate inductance are complex and depend on the geometry (E-I, toroid, wire gauge, turn spacing, number of turns. Alternate Equation for a Square Cross Section Toroid Inductor To know what inductance our coil will have, we need to know the permeability of the core material.
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