1. Design a three-phase two-level inverter using MATLAB Simulink with below spec:
DC-link voltage: 400 V
Fundamental frequency: 60 Hz
Switching frequency: 10 kHz
Sampling frequency: 2 MHz
Output load: 5 ohm and 5 mH (use three-phase series RLC
anch in element tab)
Phase A angle at 0 degree
a. Plot 0.017s of fundamental signal and triangular waveforms.
. Record and plot 0.1s of line-to-line, line-to-neutral, and phase cu
ent waveform at modulation index 1.
c. Record and plot 0.1s of line-to-line, line-to-neutral, and phase cu
ent waveform at modulation index 0.5.
d. What are the peak voltage of the line-to-line and line-to-neutral voltage?
e. Can you compare phase cu
ent from a and b? What are the differences?
2. Inject third harmonics (180 Hz, sinusoidal, m=0.15, phase angle at 0 degree) to the fundamental frequency.
a. Plot 0.017s of fundamental signal and triangular waveforms.
. Increase the modulation index of the fundamental component till its peak reaches the peak of the triangular waveform of 1.
c. Record and plot 0.1s of line-to-line, line-to-neutral, and phase cu
ent waveform at the new modulation index.
d. Can you compare phase cu
ent from 1a and 2c? What are the differences?