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A 25 MVA, three phase, 13.5kV, Y-connected, two pole, 60 Hz synchronous generator was tested by the open circuit test and short circuit test and tabulated in table 1. If the armature resistance is 0.24 ohms per phase determine the following.
a.) Determine the unsaturated region
b.) Find the unsaturated synchronous reactance of this generator in ohms per phase and in per unit.
c.) Find the approximate saturated synchronous reactance at the field current 475 A.
Assume that we try to predict this sequence with a BHT using one-bit counters. The counters in the BHT are initialized to the N state. Which of the branches in this sequence would be mis-predicted?
A constant electric field, E=12 V/cm, exists in the +x direction of an n-type gallium arsenide semiconductor for . The total current density is constant and is equal to 100 A/cm2. At x=0, the drift and diffusion current densities are equal.
An overhead line with an inductance of 1.33 mH/km and capacitance of 8.34 nF/km is connected to an underground cable with an inductance of 0.266 mH/km and capacitance of 166 nF/km.
A wafer 100mm in diameter is mounted in an electron-beam evaporation system in which the spherical radius is 40cm. Use Eq. 6.7 to estimate the worst-case varation in film thickness between the center and edges
A continuous time system, describes by y(t) = 5 Cos (2*pi*20*t+pi/2), is sampled at rate 320 Hz. a) Write the mathematical expression that describes the discrete time (sampled) signal. b) Calculate the value of the discrete signal for n=0 and n=4.
The voltage across the load must remain between 4.7 and 5.0 V for all values of load current. Design a voltage-divider network to supply the load. You may assume that resistors of any value desired are available.
Design a 4-bit binary incrementer using HALF-ADDERS as building blocks. The circuits implements A+1=S where A and S are 4-bit binary numbrers. The circuit has 4 inputs A3A2A1A0 and 5 outputs : S3S2S1S0 and overflow C4. Draw the circuit diagram wit..
A message signal, x(t) has a bandwidth of 15 kHz and an average power of 0.5 W. This signal is to be uniformly quantized with an input range of range of +-5 V. What is the bit rate of the corresponding PCM signal if the SQNR is to be greater than ..
A single phase transformer has the following rating: 120 kVA, 2000 V/100 V, 60 Hz with 1000 primary turns. Determine: (a) the secondary turns (b) the rated primary and secondary currents (c) the maximum flux
A silicon p-n-p transistor has impurity concentrations of 5*10^18, 2*10^17, and 10^16 cm^-3, diffusion constants of minority carriers 52, 40, and 115 cm^2/s and minority lifetimes of 10^-8, 10^-7, and 10^-6 in the emitter
Bob enters a pizza shop and notices there are three different sizes of pizzas available. Sizes are given as the diameter of the pizza in inches. The cost of a pizza is based on the size. Bob would like to know which size of pizza
Find the impulse response fpr the filter? How many nonzero terms does the impulse response contain?
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