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A certain boost converter is implemented with a MOSFET and a p-n diode. The MOSFET can be modeled as ideal, but the diode exhibits a substantial reverse-recovery process, with reverse recovery time tr and recovered charge Qr . In addition, the inductor has winding resistance RL.
(a) Derive an equivalent circuit that models the dc components of the converter waveforms and that accounts for the loss elements described above.
(b) Solve your model to find an expression for the output voltage
(c) Plot the output voltage vs. duty cycle over the range 0≤ D < 1, for the following values: RL =0.25Ω, fs = 150 kHz, Qr = 5 μcoul, tr = 100 nsec, R = 60Ω, Vg = 24 V.
A 1 Ghz, 1 V/m uniform plane wave is propagating in a lossy material having parameters of σ= 2 (S/m), εr= 9, and μr = 16. Determine the average power lost in propagating across a 100 cm2 surface perpendicular to it
A four-pole, 450-kW, 4.6-kV SHUNT GENERATOR HAS ARMATURE AND FIELD RESISTANCES OF 2 AND 333 Ohms. The generator is operating at the rated speed of 3,600 r/min.
The following samples of fish were taken of their weight, in grams, at a fishery before the young fish are restocked into Cane Creek Lake. From experience, we know that very few fish under 4 grams will survive.
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
Why then do we even use JFETs as amplifiers What is it that make them attractive even though they are non-linear? How do we minimize the effect of their non-linearity
Japan has both a 50 Hz power system and a 60 Hz power system. A motor - generator set is designed to connect the two. The basis is that the motor would be operated from the 50 Hz system and on a common shaft
The voltage across a 1x10^(-6)F capacitor is given by v(t)=100e^(-100t) in which time t is in seconds. 1. find an expression for the current 2. find an expression for the power 3. find an expression for the stored energy
Get digital still images and video sequences from the Internet, as needed. You can use color and/or gray-scale images. 2. Implement intra-frame DPCM . Start with a linear quantizer in the initial implementation.
The transformer is supplying a load of 325 MVA, with 0.93 power factor lagging at a voltage of 24 kV (line-to-line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.11 + j2.2 ohms connected
battery have a lifetime of 10 years, and is rated at 20 Ah (Ampere-hour) at 3.6V. Find the average power that the node can consume. Assume 100% battery and power delivery efficiency.
A voltage divider has a 5 V source and two 150 kilo ohm resistors. What is the voltage across(a) an ideal voltmeter (b) a voltmeter with an input resistance of 10 mega ohms
A piece of n-type silicon is doped so that the majority carrier concentration is 10^15 cm^-3 What is the minority carrier concentration? (ni = 1.5 x 10^10 cm^-3) If a piece of silicon is doped with phosphorus to 10^17 cm^-3, what are the equilibrium ..
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