EEE-4231
Homework#6
1.
a) Explain the applications of buck-boost converters.
b) Explain the difference between online and offline inverters.
c) Explain how sinusoidal PWM Works?
d) Explain the the difference between two-level PWM and three-level PWM.
e) Draw and explain the block architecture of an inverter.
f) Explain the modified sine wave output of an inverter.How can you obtain a pure sine wave?
2. A boost converter is to deliver 6A into the 15Ω load. The battery voltage is 48 V, L =25µH,
C= 100 µF and the chopper 60kHz.
a) Determine the on-time of the chopper.
b) The battery current variation and the average battery current.
3.
a) Explain the operation of the buck-boost converter given in the following figure.
b) Battery voltge is 96V and the output voltage is 80V calculate the duty cycle.
c) İf the output voltage is 130V what is the duty cycle?
4. A Half Bridge inverter is shown in the following figure. Vb = 60V, C1-C2 = 300F, R= 15Ω and
inverter opertion frequency is 200 Hz.
a) Draw the aoutput voltage waverorm.
b) Calculate the maximum and minimum values of load voltage.
5. A Full Bridge inverter is shown in the following figure,
a) Explain its operation
b) What is the benefit of full bridge inverter compared with half bridge inverter.