Inductance and capacitance calculation

Publisher:WeaselLatest update time:2011-11-11 Keywords:Inductor Reading articles on mobile phones Scan QR code
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The inductance is calculated as follows: Coil formula Impedance (ohm) = 2 * 3.14159 * F (operating frequency) * Inductance (mH), set to use 360ohm impedance, therefore: Inductance (mH) = Impedance (ohm) ÷ (2*3.14159) ÷ F (operating frequency) = 360 ÷ (2*3.14159) ÷ 7.06 = 8.116mH Based on this, the number of windings can be calculated: Number of turns = [Inductance * { (18*turn diameter (inch)) + (40 * turn length (inch))}] ÷ turn diameter (inch) Number of turns = [8.116 * {(18*2.047) + (40*3.74)}] ÷ 2.047 = 19 turns Capacitor power calculation formula: P=1/2 * C * V2 * F inductor power calculation formula: P=1/2 * L * I2 * FThe energy (joules) carried by the capacitor is one-half times the capacitance (farad) times the square of the capacitor voltage (volts). There is a formula for calculating the power of silicon chips: Power = C (parasitic capacitance) * F (frequency) * V2 (square of the operating voltage). For the same core, C (parasitic capacitance) is a constant, so the power of the silicon chip is proportional to the frequency and the square of the operating voltage . The energy carried by a 1 farad 5V capacitor is 12.5 joules. 1 joule = 1 watt per second The energy carried by a brand new 1.2 volt 1.8A nickel-metal hydride rechargeable battery after full charge is 1.2*1.8*3600=7776 joules. I have a 1 farad 5.5 volt capacitor on hand, which I bought in Zhongguancun for 10 yuan each. The volume is about 3 times larger than a one-yuan coin. The volume of an AA battery is 2.5 times that of a 1 farad 5V capacitor. My conclusion: Under current commercial conditions, the volume energy ratio of NiMH rechargeable batteries and Farad capacitors is 250:1, and the price ratio is 1:2. In addition, capacitor discharge requires a special constant voltage output adjustment circuit.















Keywords:Inductor Reference address:Inductance and capacitance calculation

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