Chapter 5, Problem 5.24MCQ

Answer all the questions  What is the minimum value of capacitor C1 required such that Vfiltered does not drop below 8 V?  Use the design equation(but make sure you use the right “frequency” and the correct ripple voltage). Show your calculations. Display your circuit in circuit js.   Display Vsecondary (can use the voltage across the added 100 kΩ resistor) and Vfiltered in a “Combined Scope”.  Display VDC in a separate scope:   a) Turn on “Max Scale”, “Show Peak Value” and “Show Negative Peak Value”: b) Run the simulator and adjust the window and simulation speed and time step to be able to see a couple of cycles.  Include a screen capture Document the minimum and maximum values for Vfiltered in your lab report.  Is Vfiltered maintained to be above 8 V?  By how much?  Why?  Explain the waveform shape captured Vfiltered.  It may help your understanding to rerun the simulation with C1 removed and compare that waveform for Vfiltered to that captured

A Three-phase, 3.3 kV, Y connected, 500 kVA, 16 salient pole rotor alternator. The direct and quadrature axis synchronous reactance are 8 and 50/ph respectively. The machine is supplying a load of 350 kVA at 0.8 power factor lagging, Determine: 1. Power angle. 2. Percentage Voltage regulation. 3. Developed power. 4. Reluctance power

A Three-phase, 12 pole, Y-connected alternator has 108 slots and 14 conductors per slot. The windings are (5/6th) pitched. The flux per pole is 57 mWb distributed sinusoidally over the pole. If the machine runs at 500 r.p.m., determine the following: (a) The frequency of the generated e.m.f., (b) The distribution factor, (c) The pitch factor, and (d) The phase and line values of the generated e.m.f.?