ee212_1 - 2009-2010EE 2121EE 212PASSIVE AC...

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Unformatted text preview: 2009-2010EE 2121EE 212PASSIVE AC CIRCUITSInstructor : Robert Gander Office: 2B37 Email: bob.gander@usask.caPhone: 966-4729Class Website: www.engr.usask.ca/classes/ee/212Text Recommended:Introduction to Electric Circuits - 5thor Higher Edition- R.C. Dorf and J.A. Svoboda 2009-2010EE 2122Marking SystemAssignment15Midterm Exam 25Final Exam 60Total 1002009-2010EE 2123Introduction, AC waveforms, phase shift in R, L, C circuitsSteady-state circuit analysis - time domain, phasor conceptPhasor diagrams, impedance/admittance, resistance and reactance in complex planePower factor, real and reactive powerLoop and Nodal analysisThevenin's/Norton's theorem, maximum power transfer theorem, wye-delta transformationSuperposition theorem, multiple sources with different frequency, non-sinusoidal sourcesSeries and parallel resonanceMajor Topics2009-2010EE 2124Coupled circuitsTransformer action, equivalent circuit, LossesTransformer open and short circuit tests, efficiency and voltage regulation3-phase systems, Y-delta connections/transformationsMultiple 3-phase loadsPower Measurement, Wattmeter connections in 1-phase and 3-phase balanced/unbalanced systemsPer Unit systemMajor Topics(continued)2009-2010EE 2125obeys Ohms Law (i.e. v i or v= Ri)if the ior vin any part of the circuit is sinusoidal, the iand vin every other part of the circuit is sinusoidal and of the same frequencyNon-linear circuits do not obey Ohms Law.Linear CircuitCircuit Elements:Active supply energy, voltage or current sourcee.g. battery, transistor, IC componentsPassive absorb energy e.g. resistor, inductor, capacitorEE 212 deals withSteady-state analysis of linear AC circuits (mainly power circuits)2009-2010EE 2126A sinusoidal voltage waveform is expressed as: v(t) = Vmsin tangular frequency, = 2f = 2/T rad/sMains distribution frequency: f = 60 Hz in North & South America= 50 Hz in Europe, Asia, Africa, AustraliaAC Voltage GenerationNS90180270360Vm-Vm2009-2010EE 2127Instantaneous value changes continuously with timeAverage value = 0Effective value is known as the root mean square, RMSRMS value = i.e. Vrms= Sinusoidal Waveform90180270360Vm-Vm2ValuePeak2Vm2009-2010EE 2128Response to a sinusoidal input is also sinusoidal.Has the same frequency, but may have different magnitude & phase angle.Linear Circuit with AC Excitation~viInput signal, v= Vmsin tResponse i= Imsin (t + ) where is the phase angle between vand iPower Factor: cosine of the angle between the current and voltage, i.e. p.f. = cos If is + ve, ileads vleading p.f....
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ee212_1 - 2009-2010EE 2121EE 212PASSIVE AC...

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