Hollow inductance calculation formula

Inductance (micro Heng) = the number of turns and the length of the coil cross-sectional area   Inductance calculation formula collected online !!! First BatchCalculation of loaded electric inductance: coil Formula Impedance (OHM) = 2*3.14159 * F (working frequency) * inductance (MH), set the 360ohm impedance required. Therefore: Inductance (MH) = impedance (OHM) Electrical (2*3.14159) Electrical F (operating frequency) = 360 electrical (2*3.14159) Electrical 7.06 = 8.20.mh The number of coils can be calculated accordingly: Circle number = [Electric volume * {(18 * circle diameter () + (40 * circle length ()}] ÷ circle diameter () Circles = [8.116 * {(18*2.047) + (40*3.74)}] Round 2.047 = 19 circles Hollow inductance calculation formula Author: anonymous post from: site original clicks: 6684 entry: zhaizl Hollow inductance calculation formula: L (MH) = (0.08d.d.n.n)/(3D + 9 W + 10 h) D ------ Coil Diameter N ------ coil turns D ----- Wire Diameter H ---- coil height W ---- coil width The Unit is millimeter and MH .. Calculation Formula of hollow Coil Inductance: L = (0.01 * D * n * N)/(L/d + 0.44) Coil Inductance L unit: Micro Heng Coil diameter D unit: cm Number of turns in N Units: Turns Coil length L unit: cm Formula for Calculating frequency inductance and capacitance: L = 25330.3/[(F0 * f0) * C] Operating frequency: F0 unit: MHz f0 = 125 Khz = 0.125 Resonant capacitor: C Unit: pf this question is made c = 500... 1000pf can be decided by yourself, or by Q Value Decision Resonant inductance: l unit: Micro Heng Formula for Calculating Coil Inductance Author: computation formula of Coil Inductance from: Reprinted clicks: 299 1. For the loop core, the following formula can be used: (iron) L = n2.al L = Inductance Value (h) H-DC = 0.4 π Ni/L n = coil turns (circles) Al = induction coefficient H-DC = Dc magnetization I = pass current () L = magnetic circuit length (cm) L and Al values. For details, refer to the microl table. For example: To T50-52 material, coil 5 circle half, its L value is T50-52 (OD is 0.5 ), according to the table, its Al value is about 33nh L = 33. (5.5) 2 = 998.25nh 1_1 μ h When the flow of 10a current, the L value change from L = 3.74 (table) H-DC = 0.4 π Ni/L = 0.4 × 3.14 × 5.5 × 10/3 .74 = 18.47 (after table look-up) To understand the degree of decrease in L value (μi %) 2. Introduce an empirical formula L = (k * μ 0 * μs * N2 * s)/L Where μ 0 is vacuum permeability = 4 π * 10 (-7 ). (10 to the power of 7) μs is the relative permeability of the core inside the coil, and μs = 1 for the hollow Coil N2 is the square of the number of coils Cross-sectional area of S coil, unit: square meter L coil length, in meters The K coefficient depends on the ratio of the coil radius (r) to the length (L. The unit of the calculated inductance is Henry. K value table 2R/L K 0.1 0.96 0.2 0.92 0.3 0.88 0.4 0.85 0.6 0.79 0.8 0.74 1.0 0.69 1.5 0.6 2.0 0.52 3.0 0.43 4.0 0.37 5.0 0.32 10 0.2 20 0.12Second BatchA simple inductance calculation program, only the number of turns of the wire diameter "coil diameter" must be input .... you can automatically calculate the electric inductance of the self-made coil. For the generation of RF circuit, oscillating circuit, resonant circuit without professional Measuring Instrument friends hope to have a little bit of use.