Summary of various calculation formulas on the inductor

What are the inductor calculation formulas? Coil formula: Impedance (Ω) = 2 * 3.14159 * f (operating frequency) * Inductance (H), set 360Ω impedance, so: Inductance (H) = impedance (Ω) ÷ (2 * 3.14159) ÷ F (operating frequency) = 360 ÷ (2 * 3.14159) ÷ 7.06 = 8.116h According to this, the number of windings can be calculated: Circle number = [inductor * {(18 * loop diameter (吋)) + (40 * loop long ())}] ÷ diameter () Circle number = [8.116 * {(18 * 2.047) + (40 * 3.74)}] ÷ 2.047 = 19 laps Hollow inductance calculation formula Hollow inductance calculation formula: L (MH) = (0.08d.d.n.n) / (3D + 9W + 10h) D-coil diameter, N-coil number, D-wire diameter, H-coil height, W-coil width The unit is mm and MH, respectively. Hollow coil inductance calculation formula: L = (0.01 * d * n * n) / (L / D + 0.44) Coil Pyrographic Quantity: L, Unit: Micro. Coil diameter: D, unit: cm. Coil number: n, unit:. Coil length: L, unit: cm Frequency inductor capacitor calculation formula: L = 25330.3 / [(f0 * f0) * c] Working frequency: f0 unit: MHz this question f0 = 125kHz = 0.125 Resonant capacitance: C unit: PF This question C = 500 ... 1000pf can be decided first, or determined by the Q value Resonant Polymerapers: L Unit: Weather Cooperative calculation formula 1. Aimed on loop core, there is a formula available: (Iron) L = N2. Al L = inductance value (h) H-DC = 0.4πni / L n = Coil turns (circle) Al = inductive coefficient. H-DC = DC magnetization I = by current (a). L = magnetic circuit length (cm) L and Al value, you can refer to the microetal comparison table. For example, with T50-52, the coil is half a circle, and the L value is T50-52 (indicating the OD of 0.5 inches), and the AL value is approximately 33nh. L = 33 (5.5) 2 = 998.25NH ≒ 1μH When the current flows through 10A, the L value change can be from L = 3.74 (check table) H-DC = 0.4πni / L = 0.4 × 3.14 × 5.5 × 10 / 3.74 = 18.47 (after the table) Learn about the degree of L value (μi%) 2, introduce an empirical formula L = (k * μ0 * μs * n2 * s) / L in The μ0 is vacuum magnetic permeability = 4π * 10 (-7). (10 negative seven times) μs is the relative magnetic permeability of the internal core of the coil, and the hollow coil is μs = 1 N2 is the square of the number of coil The cross-sectional area of ​​the S coil is square meters. l The length of the coil, unit is rice The K coefficient depends on the ratio of the radius (R) and length (L) of the coil. The calculated unit of inductance is Henry (H). FQJ, read full text

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