1. DC to DC Converters with PSpice
Professor Babak Fahimi, PhD
Director, Power Electronics and Controlled Motion Laboratory
University of Texas at Arlington

2. DC to DC Converters Buck Converter
a) Make the circuit for buck converter using the following parts:
VDC (voltage source)
VPULSE (voltage source)
IRF150 (Swtich)
R (Resistance)
L (Inductance)
C (Capacitance)
DIN4002 (Diode)
GND_SIGNAL/CAPSYM
PARA ( For defining variables and their values)
Double click on the parameter “PARA” and then use “new column” option for adding the varibles and their values.

4. Simulate the circuit and get plots for capacitor current and voltages

5. Similarly get plots for inductor current and voltages

6. For getting plots for load current at different values of duty cycle use “Parametric sweep” from “Simulation parameters settings” and then put “Duty Cycle” as the parameter name. Specify its start value, end value and increment.

8. Similarly get plots for load current at different switching frequencies

10. 2) Boost Converter
Make the circuit for boost converter using the following parts:
VDC (voltage source)
VPULSE (voltage source)
IRF150 (Swtich)
R (Resistance)
L (Inductance)
C (Capacitance)
DIN4002 (Diode)
GND_SIGNAL/CAPSYM
PARA ( For defining variables and their values)
Double click on the parameter “PARA” and then use “new column” option for adding the varibles and their values.

12. Simulate the circuit and get plots for capacitor current and output voltage.

13. Similarly get plots for inductor current and voltages

14. For getting plots for load current at different values of duty cycle use “Parametric sweep” from “Simulation parameters settings” and then put “Duty Cycle” as the parameter name. Specify its start value, end value and increment.

17. Similarly get plots for load current at different switching frequencies

19. 3) Fly Back Converter
Make the circuit for Fly Back converter using the following parts:
VDC (voltage source)
VPULSE (voltage source)
IRF150 (Swtich)
R (Resistance)
L (Inductance)
C (Capacitance)
DIN4002 (Diode)
XFRM_Linear ( Transformer set coupling between windings as 1)
GND_SIGNAL/CAPSYM
PARA ( For defining variables and their values)
Double click on the parameter “PARA” and then use “new column” option for adding the varibles and their values.

21. Simulate the circuit and get plots for output voltage and current

22. Using the parametric sweep get plots for output current at different duty cycles