Inductive Reactance

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Inductive Reactance. Electronics. Inductors in AC Circuits. Inductance. I nductance opposes a change in current. Inductors create a voltage that opposes the current. Counter EMF (voltage). v. L. Inductance. The Henry (symbol: H) is the SI unit of inductance . - PowerPoint PPT Presentation


<ul><li><p>Inductive ReactanceElectronics</p></li><li><p>Inductors in AC Circuits</p></li><li><p>InductanceInductance opposes a change in current.</p><p>Inductors create a voltage that opposes the current.Counter EMF(voltage)</p></li><li><p>InductanceThe Henry (symbol: H) is the SI unit of inductance. </p><p>It is named after the American physicist Joseph Henry..</p></li><li><p>CurrentVoltageCapacitor in DC </p></li><li><p>ELI</p></li><li><p>E L IVoltageInductanceCurrentVoltage leads Currentin anInductive Circuit</p></li><li><p>CurrentVoltageInductance in AC </p></li><li><p>Current VoltageI = Ipsin(2ft) Ip-Peak Current 2-Cycle f-frequency(Hz) t-time(seconds) V = L di/dt V = L Ip(2f)cos(2ft) Vp = Ip(2f)L V = L d(Ipsin(2ft))/dt </p></li><li><p>Vp = Ip2fL R = 2fL Inductive ReactanceXL = 2fLL is an Active ComponentVp/Ip= 2fL </p></li><li><p>Calculate the maximum current in a coil which has an inductance of 3 mH. The frequency is 60Hz. The maximum voltage across the coil is 6 V. XL = 2fLL=3mHE=6Vf=60HzXL = 2(60Hz)(.003H)XL = 1.13I = E/XLI = 6V/1.13I = 5.3A</p></li><li><p>Inductive/Resistive Circuit90 Phase Shift caused by InductorImpedance, Z, is calculated by adding XL and R vectorially.</p></li><li><p>What is the impedance of a 100mH choke in series with a 470 resistor with a 12V, 60Hz applied across them? What is the phase angle between voltage and current?XL = 2fLL=100mHE=12Vf=60HzXL = 2(60Hz)(.1H)XL = 37.7R=470</p></li><li><p>CurrentVoltageInductance in AC 4.6</p></li><li><p>Inductance in AC Circuits</p></li><li><p>1mF = 1 X 10-3F</p><p>1F = 1 X 10-6F</p><p>1nF = 1 X 10-9F</p><p>1pF = 1 X 10-12F</p><p>Capacitor Values</p></li><li><p>RLC Circuits</p></li><li><p>RLC Circuits90 Phase Shift caused by Inductor-90 Phase Shift caused by Capacitor</p></li><li><p>Xc = 1/(2fC)Xc = 1/(2(60)(1.5X10-6)Xc = 1768XL = 2fLXL = 2(60)(0.65)XL = 245 = -81ICE Current leads Voltage by 81</p></li><li><p>ResonanceThe frequency where XL = XCThe Circuit becomes a purely resistive circuit</p><p>Xc = 1/(2fC)XL = 2fL1/(2fC) = 2fL</p><p>Xc = XL1/(42CL) = f2</p></li><li><p>161 Hz= f</p></li><li><p>Worksheet Lab 2-6Capacitors In AC CircuitsProblems</p></li><li><p>Reactance Test ClassworkLab 7, Book 2 Capacitive ReactanceWorksheetsLab 2-5Lab 2-6Lab 2-8Lab 2-9Lab 2-11Lab 2-12Lab 2-13}Due the day of the test!!</p></li></ul>