Project 1

Salution :

In the above CCM (40 to 50V and 400 to 5000V), boost CCM(20 to  30 V and 200 to 3000V) and sepic (30 to 60V and 300 to 600V) are cgosen

Buck converter :

Buck converter in continuous mode

 Buck converter step down DC voltage . it consist of inductor , capacitor and two switch which are transistor and diode transistor (mosfet or igbt based on application)  is a switch that oprate with on and off state . On and off state get controller by the gate signal 

Data 

Vin = 40 to 50 V

Vout = 30V

Power = 500W

if Vin = 40 

than D = Vout/Vin  = 30/40  = 0.75

if Vin = 50V

D = 0.6

IL = P/Vout = 300/30  = 10A

R = Vout^2/P  = 30^2/300

=   900/500  =  3ohm

Ripple  IL = 0.1*10

1A

 L  =  Vout (1-d)/Fs Delta IL

  =  30*(1-0.75)/50*1000*1 =  0.00015H

Cout = (1-D)/8LFs^2(DeltaVout/Vout)   8.33*10^-7F

Vin = 400 to 500V

Vout = 300V

Power = 3K

if Vin =  400V

D =  0.75

If Vin = 0.6

IL = 10A

R = 30Ohm

Ripple = 1A

L = 0.00015H

Cout = 8.33F

same as 

The input voltage rage is 40 to 50 and 400V to 500 V in another buk onverter as per the different input inductor and capacitor value are designed accordingly

Boost_ conveter CCM

The converter is the step up DC - DC cconverter . the output capacitor is the one that filters the pulseation current and allow DC current to flow through the output.

IN contonuous conduction mode the inductor current flow continuously duing the operation on the converter . two semiconductor  during the operaton the during the operation of the converter the two semi converter switch in operation are diode and mosfet which operate with the PWM pulse Mosfet is a ewitch whose gate pulse are given by the pulse generater based on the duty requrement to the switch.

It is considered that the frequency is considered as 30KHz

Vin = 20 to 30V

Vout = 40V

If Vin = 20V

 D = 1/1-D = Vout/Vin  = 40/20  = 0.5

If Vin = 30V

D = 0.25

R = 2.67ohm

IL = 29.96A

L = 3.33*10^-3H

C = 3.121*10^-5F

Sepic converter :

Sepic converter is the signal ended primary inductor converter . this is a type of dc dc converter that operate to allow the electrical output grater than lessthan equal ti the input output is controlled by the duty cycle of the switch 

Vin = 30 to 60V 

 Vout =  46

Power 1

D = 0.6

L1 = 10.8*e-3

L2 = 16.2e-3

c1 = 8.89e-5

c2 = 5.9e-5

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