types of inverter and multilevel inverter

1. PROJECT ON-
COMPARISON OF DIFFERENT
MULTILEVEL INVERTER
SUBMITTED BY -
SUBHASH KUMAR
VIKAS SINGH RAGHUVANSHI
YATHARTH SAGAR
YOGENDRA KUMAR
IN SUPERVISION WITH –
G.K NAVEEN KUMAR
AJAY KUMAR GARG
ENGINEERING COLLEGE

2. Inverter-
An inverter is an electrical circuit capable of turning DC
power into AC power, while at the same time regulating the
voltage,current, and frequency of the signal.
Classification of Inverter
 Depending upon the type of source-
-VSI
-CSI
 Based upon configuration -
-Series Inverter
-Parallel Inverter
-Bridge Inverter
 Based upon output voltage waveform
-Square wave Inverter
-Quasi sequence wave
-PWM Inverter
-Sine Wave Inverter

3.  Based upon switching device
- Thyristor Inverter
- Transistor Inverter
- IGBT Inverter
- IGO Inverter
- MOSFET Inverter
Methods of Inversion
 Rotary inverters use a DC to turn motor an AC Power
generator, To provide a true sine wave output, but are
inefficient, and have a low surge capacity rating.
 Electrical inverters use a combination of ‘chopping’
circuits and transformers to change DC power into AC.
They are much more widely used and are far more efficient
and practical. Less expensive electrical inverters produce a
modified sine wave, while more expensive models give a
true sine wave.

4. Single-phase half-bridge inverter
 ThesinglephasehalfbridgeconsistsoftwoSCRsandtwo
diodes and three wire supply.
For 0 < t ≤ T/2, thyristorT1 conductsandloadissubjected
toavoltageVs/2duetoupper voltage sourceVs/2.
 Att=T/2,thyristorT1commutedandT2isgatedon. Duringthe
periodT/2<t≤T,thyristorT2conductsand
loadissubjectedtoavoltage(-
Vs/2)duetolowervoltagesourceVs/2.
LoadvoltageisanalternatingvoltageofamplitudeofVs/2and
offrequency1/THz.
 Thefrequencyoftheinverteroutputvoltagecanbechangedby
controllingT.
 Themaindrawbackofhalf-bridgeinverteristhatitrequires3- wire
DCsupply.

5. Operation

6. Wave form