Project 3
Design and simulation of Buck converter for Auxiliary load in EV:
1. Input Voltage is 48V
2. Output Voltage is 12 V
3. Load Current is 10A
Duty Ratio(D):
Duty Ratio= Output Voltage/Input Voltage
Duty Ratio = 12/48
Durty Ratio = 25%
Inductance Value(L):
Assume R-8 Ohm
Assume Frequency is 40 KHz
L=(1-D)R/2f
L=(1-0.25)*8/2*40*10^3
L= 6/80000
L=75
Capaciatnce Formula(C):
C=1-D/8L*Ri*f^2
Ri-Ripple Current-2
C=1-0.25/8*75*2*40*10*10
C= 0.75/4800000
C= 156.25
Simulink Model:
Below mentioned block are required:
1. PWM Generator
2. Mosfet Switch
3. Diode
4. DC Voltage Source
5. Current Measurement
6. RLC
7. Voltage Measurement
8. Scope
9. Power Gui
1. PWM Generator
In Pwm Generator duty ratio is 25% and Frequeny mentione below here.
2. DC Voltage Source
As per input dc input voltage is 48V
Simulink Model & Results:
Here with i have attached simulink model for your reference