MATLAB/Simulink experiment for dc-dc converters
Budget: £10 – £20 GBP
Question 1 – open-loop buck dc-dc converter:
Question 1a – Include the scope output waveforms in the report. (VO and IL)
Question 1b – Change the duty cycle value (D) block, and fill in the Table 1:
Question 1c – Explain why the Vo/Vin ratio is not identical to the expected ratio based on the Duty cycle (D) parameter in a typical buck converter.
Question 2 – Closed-loop control of dc-dc buck converter:
Question 2a – Include the output waveforms of Vo and IL.
Question 2b – Set the gain 2 parameters as the Table 2, and include the output voltage
waveforms in each experiment (Vo and IL)
Question 2c – In a buck converter control system, the system output can have three types of responses: Overdamped, underdamped, and critically damped. Specify the system response in this regard in each experiment
Question 2d – [Discussion] in which of the responses, the system enters its steady state earlier? (do not confuse this with rise time). In which state, the system is experiencing higher overshoot value? Is there any relationship between system agility and the overshoot percentage value? Discuss the advantages and disadvantageous of each of these three responses.
Question 3 – Step response of Buck dc-dc converter
Question 3a – Change the value of Gain2 block according to the Table 3. Report the required
parameters and waveforms in the table.
Question 3b – Based on the obtained results in Question 3a, compare the step response of the buck converter in the three modes of operation. In your comparison, include the performance of the converter with criteria including 1) Settling time, 2) Rise time, and 3) Overshoot.
Question 3c – Consider a case in which the abovementioned buck converter is supposed to supply a DC load. An important feature of the power supply for the load is supplying converter able to provide a voltage in which the settling time of a load transient with value of 1 Ω is less than 0.3ms. Taking this into consideration, which of the compensator topologies, as tested in Question 3a, can be used for this purpose? Compare your selection in terms of the rise time and overshoot.
Question 1a – Include the scope output waveforms in the report. (VO and IL)
Question 1b – Change the duty cycle value (D) block, and fill in the Table 1:
Question 1c – Explain why the Vo/Vin ratio is not identical to the expected ratio based on the Duty cycle (D) parameter in a typical buck converter.
Question 2 – Closed-loop control of dc-dc buck converter:
Question 2a – Include the output waveforms of Vo and IL.
Question 2b – Set the gain 2 parameters as the Table 2, and include the output voltage
waveforms in each experiment (Vo and IL)
Question 2c – In a buck converter control system, the system output can have three types of responses: Overdamped, underdamped, and critically damped. Specify the system response in this regard in each experiment
Question 2d – [Discussion] in which of the responses, the system enters its steady state earlier? (do not confuse this with rise time). In which state, the system is experiencing higher overshoot value? Is there any relationship between system agility and the overshoot percentage value? Discuss the advantages and disadvantageous of each of these three responses.
Question 3 – Step response of Buck dc-dc converter
Question 3a – Change the value of Gain2 block according to the Table 3. Report the required
parameters and waveforms in the table.
Question 3b – Based on the obtained results in Question 3a, compare the step response of the buck converter in the three modes of operation. In your comparison, include the performance of the converter with criteria including 1) Settling time, 2) Rise time, and 3) Overshoot.
Question 3c – Consider a case in which the abovementioned buck converter is supposed to supply a DC load. An important feature of the power supply for the load is supplying converter able to provide a voltage in which the settling time of a load transient with value of 1 Ω is less than 0.3ms. Taking this into consideration, which of the compensator topologies, as tested in Question 3a, can be used for this purpose? Compare your selection in terms of the rise time and overshoot.