22-11-2012, 11:41 AM
MULTI LEVEL INVERTER
MULTI LEVEL INVERTER.pptx (Size: 2.09 MB / Downloads: 371)
INTRODUCTION
Numerous industrial applications require higher power apparatus in recent years.
Multilevel inverter is introduced for the above cause.
It has overshadowed the conventional 2-level inverter.
It can be easily interfaced to the renewable energy sources.
Topologies Of MLI
Diode -Clamped Multi-level Inverter
Flying -Capacitor Multi-level Inverter
Cascade Multi-level Inverter
Diode – Clamped Multi-level Inverter
BRIEF IDEA-
An m-level DCMLI consists of
m-1 capacitors on the dc bus
2(m-1) switching devices
(m-1)(m-2) clamping diodes
m-level output phase-leg voltage
(2m-1) –level output line voltage
Flying- Capacitor MLI
Ladder structure of dc side capacitors
An m-level FCMLI has
m-levels of phase voltage
2m-1 levels of line voltage
m-1 capacitors
FUTURE WORK
A suggestion for future research concerns the
unified approach switching scheme.
Another suggestion is to implement the multi-
level inverter with unequal dc sources.
Conclusion
This chapter has demonstrated the fundamental multilevel inverter structures and including the pros and cons .
This presentation has covered the basic ideas of the multilevel inverter.
Emerging as a new breed of power converters for high-voltage high-power applications.