DEPARTMENT OF ELECTRICAL POWER ENGINEERING

COLLEGE OF ENGINEERING

POWER ELECTRONICS

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Buck Converter Example:

The circuit diagram shown is a buck converter. Assume that no forward conduction loss for diode and switch.

The circuit operates in steady state condition.The switch is closed for time DT and opened for time (1 - k) T.

Calculate:

  • a .Output voltage
  • b. Capacitor voltage
  • c. Inductor current (maximum)
  • d. Inductor current (minimum)
  • e. Output Current

Sketch the waveform for:

  • a. Input voltage
  • b. Output voltage
  • c. Capacitor voltage
  • d. Diode voltage
  • e. Inductor voltage
  • f. Inductor current
  • g. Capacitor current
  • h. Output Current
  • i. Diode Current
  • j. Input Current

Please enter the input value:

Input voltage (positive value only): V

Duty ratio (0 < D < 1):

Inductor (larger than Lmin): H
Capacitor: F
Switching Frequency: Hz
Resistance: ohm

Output Voltage = Capacitor Voltage (V)

Inductor Current(maximum) (A)

Inductor Current(minimum) (A)

Output Current (A)

Output Voltage Ripple


Voltage Waveform
Current Waveform
Input Voltage(Vs) and Output Voltage(Vo)
(Capacitor Voltage Vc = Output Voltage Vo)
Input Current, is

Diode Voltage, Vd
Diode Current, id
Inductor Voltage, VL
Induction Current, iL
Output Current, io
Capacitor Current, ic

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