Shinnster
Member level 4
- Joined
- Sep 15, 2009
- Messages
- 70
- Helped
- 1
- Reputation
- 2
- Reaction score
- 0
- Trophy points
- 1,286
- Location
- Malaysia
- Activity points
- 1,800
Hello!
I tried to simulate a multilevel inverter (7 lvls)
on MATLAB Simulink using Bipolar switching (PWM) - Cascaded h-bridge inverters (3 of them).
if I tried to simulate with just 1, I do get the result as shown in the link below on page 233:
https://www.ijareeie.com/upload/october/3_Design and Implementation.pdf
(P.S: Link's a free journal?)
For multi-level I used phase shifted carrier PWM approach of 180/n.
I do manage to get a fairly decent result but the problem was at or near 0 point of Sine wave, it fluctuates between Vdc and -Vdc so the waveform looks awkward. Any suggestion to reduce this?
Thanks :] Unipolar was more straightforward and worked well using the same approach.
:bang:
I tried to simulate a multilevel inverter (7 lvls)
on MATLAB Simulink using Bipolar switching (PWM) - Cascaded h-bridge inverters (3 of them).
if I tried to simulate with just 1, I do get the result as shown in the link below on page 233:
https://www.ijareeie.com/upload/october/3_Design and Implementation.pdf
(P.S: Link's a free journal?)
For multi-level I used phase shifted carrier PWM approach of 180/n.
I do manage to get a fairly decent result but the problem was at or near 0 point of Sine wave, it fluctuates between Vdc and -Vdc so the waveform looks awkward. Any suggestion to reduce this?
Thanks :] Unipolar was more straightforward and worked well using the same approach.
:bang:
