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The exciting current for a certain 50-kVA, 480-240V, 60 HZ transformer is 2.5 percent of rated current at a phase angle of 79.8 degrees. Sketch the equivalent circuit and phasor diagram for the no-load conditions and, assuming operation is in the step down mode, determine (a)the exciting current; (b)the core loss component of the exciting current; (c)the magnetizing current; (d)the core loss.
find the fourier series coefficients of z(t) (use the results of a) and b) along with the multiplication property of continuous time fourier series coefficients). find the fourier series coefficients of z(t) through direct expansion of z(t) in tri..
Find two renewable energy application where ac/dc converters are used. Explain qualitatively the role of the converter in the application
Suppose a signal is sampled at 1 kHz and you compute the DFT of the signal using 1000 signal samples. What frequency in Hz corresponds to the 150th value of the DFT
A PLL frequency synthesizer has an output frequency of 470 MHz. A divide-by-10 prescaler is used. The reference frequency is 10 kHz. What is the frequency step increment
0.143-henry inductor is connected in series with a variable capacitor to a 208-volt 400-cycle source. For what value of capacitance will the current be a) 1.04 A leading b) 1.04 A lagging
Two loudspeakers, one of them generates sound 400W power the other with 100W. The sound is generated isotropically from each loudspeaker. A listener is seated 20 m from the 100 W loudspeaker and 40 m from the other loudspeaker.
The power is generated by a DC power facility at a voltage of 10 V and deliver by two power lines with resistance Rline=3 ohm. The maximum power the voltage source can deliver is 5 W. a) Find the total power delivered by this DC voltage source
Given a buck-boost converter (with ideal components): 8 V. Vin 40 V.; Vo = 15 V. (regulated); C = 470 micro Farads; and fs = 20 KHz. (a) Determine minimum L to ensure CCM operating mode if Po 2 W.;
describe the steps in the procedure based on grid-based color/texture histogram similarity measure for database retrieval of images that closely match a query image.
The unit step response of a linear time invariant system is s(t) = (1 - e-at)u(t). Where "a" is a positive, real valued constant. What is the impulse response of the system. What is the frequency response of the system.
What is the bandwidth required so that the modulated signal contains atheist 90% of the power of the unmodulated carrier. A carrier signal c(t) = 10 cos(2pifct) is modulated using a message signal m(t) cos(20pit). The modulation is FM, with kf = 50.
Eigenfunctions and LTI systems, The eigenfunction property is only valid for LTI systems. Consider the cases of nonlinear and of time varying systems.
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