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A 6 pole round rotor 3 phase star connected synchronous machine has the following test results:Open circuit test: 4000 V line to line at 1000 rev/min, 50 A rotor currentShort circuit test: 300 A at 500 rev/min, 50 A rotor currentNeglect the stator resistance and core losses, and assuming a linear open circuit characteristic, calculate:(a) the machine synchronous reactance at 50 Hz,(b) the rotor current required for the machine to operate as a motor at 0.8 power factor leading from a supply of 3.3 kV line to line with an output power of 1000 kW,(c) the rotor current required for the machine to operate as a generator on an infinite bus of 3.3 kV line to line when delivering 1500 kVA at 0.8 power factor lagging,(d) the load angle for (b) and (c), and sketch the phasor diagram for (b) and (c).
Discuss the differences between series and parallel circuits. What are some advantages and disadvantages of each type Discuss why the total power equals the sum of the individual values of power, whether a series circuit or a parallel circuit is u..
You have a 10 nH inductor. What value of capacitor should you put in series with the inductor to achieve an impedance of Z=j50 ohm at f=1.0 GHz
A circuit consists of a current source, i=0.030 sin 500t, in parallel with L=20mH, C=50 micro Farads and R=25 Ohms. a. Determine the voltage V across the circuit. b. Solve for the power factor of the circuit.
Build a home security system circuit using this program. The system must include 2 door sensors, 3 window sensors, 2 smoke detectors, 2 water leak sensors, and 2 motion detectors.
Sketch the amplitude spectrum of a DTMF signal with finite duration. You should make this sketch by hand, using the Fourier transform expression obtained in part 1). What happens to the DTMF spectrum when T is "too small"
The angle of departure is defined as 180 degrees plus the phase angle of GH computed at the complex pole, but ignoring the contribution of that particular pole.
A current source of 12 cos 2000t A, a 200-ohm resistor, and a 0.2-H inductor are in parallel. Assume steady-state conditions exist. At t = 1 ms, find the power being absorbed by the (a) resistor; (b) inductor; (c) sinusoidal source.
A three-phase, 60Hz, wye-connected synchronous generator has balanced line-to-line voltages of 480V at its terminals. The generator is supplying power to two balanced and delta connected, three-phase loads. the first load is made up of three.
A wafer 100mm in diameter is mounted in an electron-beam evaporation system in which spherical radius is 40cm. Estimate the worst case variation in film thickness between the center and edges of the wafer for an evaporated aluminium 1micro meter t..
A He-Xe mixture containing 0.75 mole fraction of helium is used for cooling of electronics in an avionics application. At a temperature of 300 K and atmospheric pressure, calculate the mass fraction of helium and the mass density.
A PLL frequency synthesizer has a variable -modulus prescaler of M=10/11 and divider ratios of the A and N COUNTERS OF 40 and 260. the reference frequency is 50khz. what are the VCO OUT PUT FREQUENCY and the minimum frequency step increment
A sled is traveling at 4 m/s along a horizontal stretch of snow. The coefficient of kinetic friction is 0.05 . How far does the sled go before stopping ?
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