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The parallel resonant converter as a single-phase high-quality rectifier.It is desired to utilize a transformer-isolated parallel resonant dc-dc converter in a single-phase low-harmonic rectifier system.By properly varying the converter switching frequency,a near-ideal rectifier system that can be modeled as in Fig.18.12 is obtained.You may utilize the results of Section 19.5.2 to answer this problem.The parallel resonant tank network contains an isolation transformer having a 1: nturns ratio.You may use either approximate graphical analysis or computer iteration to answerparts (b) and (c). (a) (b) (c) (d) Plot the normalized input characteristics (normalized input voltage = normalized input current of the parallel resonant converter, operated in the continuous conduction mode above resonance.Plot curves forF= = 1.0, 1.1, 1.2, 1.3, 1.5, and 2.0.Compare these characteristics with the desired linear resistive input characteristic = The converter is operated open-loop, with F=1.1.The applied normalized input voltage is a rectified sinusoid of unity magnitude:= Sketch the resulting normalized input current waveform Approximately how large is the peak current?The crossover dead time? A feedback loop is now added, which regulates the input current to follow the input voltage such that = You may assume that the feedback loop operates perfectly.For the case and with the same applied (t) waveform as in part (b), sketch the switching frequency waveform for one ac line period [i.e., show how the controller mustvaryFto regulate .What is the maximum value ofF?Note:In practice, the converter would be designed to operate with a smaller peak value of ,so that the switching frequency variations would be better behaved. Choose element values (tank inductance, tank capacitance, and transformer turns ratio) such that the converter of part (c) meets the following specifications: Ac input voltage 120 Vrms, 60 Hz DC output voltage 42 V Average power 800 W Maximum switching frequency 200 kHz Refer the elementvalues tothe primary side of the transformer
Steam at 3.45 MPa, 260oC enters a well-insulated valve operating at steady state with a mass flow rate of 0.05 kg/s through a 2.54 cm diameter pipe. The steam expands to 1.40 MPa with no significant change in elevation.
Use the table on slide 11 of this lecture and determine the line parameters L and C of the transmission line. Consider that the TL is lossless and µ = µ0 for polystyrene. Then find the characteristic impedance of the line Z0, phase velocity
Calculate the thermal-equilibrium electron and hole concentrations in a compensated p-type semiconductor. Consider a silicon semiconductor at T=300K in which Na = 10e16 cm-3 and Nd=3x1015 cm-3. Assume ni = 1.5 x1010 cm-3.
At a temperature of 770 C find the resistivity of ptype Si with Na= 1015/cm3. For the doped Si at the given temperature assume μn=1000cm2/V.s and μp = 350cm2/V.s.
Consider a hollow cylinder with a length L along the z-axis and a radius R and a charge -Q, containing a wire also of length L and charge Q running co-axially to the cylinder at its center.
Consider a satellite communication link with a one way propagation delay of 300ms between the sender and receiver, operating at 10Mbps using packets of length 1500bytes. Length of the ACK packet is also 1500 bytes.
Efficiency of MOSFET circuit provide in datasheets of any product is measured at transient state of my output node or staedy state?
The output should have an adjustable linear output voltagerange of between 0 to 5 V and be capable of supplying a current of150 mA throughout the voltage range. The design should include acircuit schematic and provide complete specification of all..
the resistances and leakage reactances in ohms of a 25-kva 60-hz 2400240-v distribution transformer are r1 0.650 omega
What is the path attenuation between transmitter and receiver at a frequency of 1.2 GHz and a distance of 11,000. Given: f = 1.2GHz d = 11,000 mi. Calculate the path attenuation; dB = 37dB + 20 log f + 20 log d = 37 + 20 log 1.2^9 + 20 log 11,000
Design a circuit that given a 4-bit BCD digit(0-9) will produce a 2-bit quotient and a 2-bit remainder for a division by3. This circuit will have four inputs--the four bits of the BCD digit--and four outputs--2 bits for the quotient and 2 bits for..
your new network assistant has ordered a batch of rj-11 connectors to keep in reserve for building network cables on
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