Pspice Simulation assignment

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Zbunzzq3000

Engineering

The University of Tennessee - Chattanooga

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SIMULATION ASSIGNMENT #4 Step-Up (Boost) DC-DC Converter Use the above component values for the simulation. Objective: The objective of this experiment is to observe switching waveforms in a Boost Converter operating at a fixed duty-ratio and consisting of a near-ideal MOSFET and diode. Exercises: 1. Plot the waveforms for iL, vL and vo . 2. Plot the average value of vL . 3. Plot iL and measure the peak-peak ripple ∆iL and compare it with Eq. 3-21. 4. Plot iC and idiode waveform. What is the average of iC ? Compare the iC waveform with the ripple in idiode . 5. Plot the input current waveform and calculate its average. Compare that to the value calculated from Eq. 3-23. 6. Calculate the inductance value of L, if ∆iL should be 1/3rd of the input current. Verify the results by simulations. 7. Calculate Rcrit from Eq. 3-45 and verify whether the converter is operating on the boundary of CCM and DCM. Reference: Chapter 3
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SIMULATION ASSIGNMENT #4
Name
University
Date

1

Step-Up (Boost) DC-DC Converter

Figure 1: component values for the simulation

Objective:
The objective of this experiment is to observe switching waveforms in a Boost Converter
operating at a fixed duty-ratio and consisting of a near-ideal MOSFET and diode.

2

Simulation Results
1. Plot the waveforms for iL, vL and vo .

Figure 1.
Waveform of Il

Figure 2.
Waveform of VL

3

Figure 3.
Waveform of Vo

2. Plot the average value of vL .

Figure 4. Average Waveform of VL

3. Plot iL and measure the peak-peak ripple ∆iL and compare it with Eq. 3-21.

Figure 5.
Waveform of ...


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