Reference no: EM13869548
A buck converter has an input voltage Vin = 24 V, switching frequency fs = 100 kHz, duty ratio d = 50%, load resistance RL = 10 Ω, inductance 100 µH, and capacitance 680 µF.
1. Calculate the following values, and include units in your answers:
a) Average output voltage, Vo
b) Average output current, Io
c) Peak-to-peak current ripple, ΔiL
d) Output current that will cause the converter to enter DCM (I0,crit)
e) Load resistance that will cause the converter to enter DCM (Rcrit)
f) Average voltage across the inductor in steady-state
g) Average current through the inductor in steady-state
h) Peak-to-peak voltage ripple across the capacitor, ΔvC
i) Average voltage across the capacitor in steady-state
j) Average current into the capacitor in steady-state
k) Approximate magnitude of the peak-to-peak ripple in the capacitor current, ΔiC
2. Sketch the following waveforms, and include the theoretical maximum and minimum values of each waveform:
a) q(t)
b) vDS
c) vdiode
d) vL
e) iL
f) iC
g) Output voltage (including ripple)
3. Qualitatively describe the effect on Io, ΔiL, Rcrit, and ΔvC if you:
a) Increase the duty ratio (assume that you're starting at d = 50%)
b) Increase the switching frequency
c) Increase the load resistance
4. If you were trying to make a buck converter enter DCM, but your load resistor could not reach Rcrit, what other controllable parameters (not including Vin) could you change to reduce the lowest value of iL to zero? Explain your reasoning.
Show steps needed to look up ann arbor using binary search
: Show steps needed to look up Ann Arbor using binary search on the following list: Ann Arbor, Berkeley, Cambridge, Eugene, Madison, New Haven, Pasadena, Santa Cruz, Stony Brook, Westwood, and Yellow Springs.
|
What does this behavior suggest about omole ethics
: Omole displayed contempt for the court and ridiculed his victims, calling them stupid for having been cheated. What does this behavior suggest about Omole's ethics
|
Seles company adopts a performance based share option
: On January 1, 2010, Seles Company adopts a performance based share option plan for its 80 key executives.
|
Explain the general intent of a trojan horse
: Explain the general intent of a Trojan horse.
|
Theoretical maximum and minimum values
: Sketch the following waveforms, and include the theoretical maximum and minimum values of each waveform:
|
Describe the steps that would use in order to convert data
: Describe the steps that you would use in order to convert database tables to the First Normal Form
|
Is it possible to use binary search on a table
: Is it possible to use binary search on a table whose size is prime? Compute the hash code for each of the following symbols by adding up the letters (A = 1, B = 2, etc.).
|
How many probes will be needed on average to enter a symbol
: If that one is also full, another is used, and so on, until an empty is found. If the fraction of the slots that are full is R, how many probes will be needed, on the average, to enter a new symbol?
|
Calculates the total annual compensation of a salesperson
: calculates the total annual compensation of a salesperson
|