New Multilevel Inverter Topology
New Multilevel Inverter Topology
New Multilevel Inverter Topology
Contents
Introduction
Cascaded H-Bridge Inverters
Multilevel DC Link Inverter
Modulation Strategies Inverter
Carrier based PWM methods
Simulation Results
Conclusions
References
20/10/2015
ABSTRACT
New class of three phase seven level inverter
based on a multilevel DC link (MLDCL) and a
bridge inverter to reduce the number of switches.
For voltage levels, the required number of active
switches is 2 (m-1) for the existing multilevel
inverters, but it is m+3 for the MLDCL inverters.
The output of proposed MLDCL is synthesized
as the staircase wave, whose characteristics are
nearer to a desired sinusoidal output.
20/10/2015
INTRODUCTION
Multilevel inverters consist of 3 types named as
i. Diode clamped flying
ii. Capacitor multilevel inverter
iii. Cascaded multilevel inverter
Compared to diode clamped & flying capacitor type
cascaded H-bridge multilevel inverter requires least
no. of components to achieve same no of voltage
levels
20/10/2015
H-BRIDGE INVERTERS
In single phase inverter,
for positive half cycle S1
and s2 will turn on, for
negative half cycle S3 and
S4 will turn
Connecting two or more
inverter in series than it
said to be Multi level
inverter.
20/10/2015
20/10/2015
20/10/2015
20/10/2015
20/10/2015
10
20/10/2015
11
20/10/2015
12
20/10/2015
13
20/10/2015
14
20/10/2015
15
16
17
20/10/2015
18
20/10/2015
19
20/10/2015
20
Conclusion
The cascaded MLDCL inverters are cost less
due to the savings from the eliminated gate
drivers
From fewer assembly steps because of the
substantially reduced number of components,
which also leads to a smaller size and volume.
20/10/2015
21
Thank You
20/10/2015
22