By | May 20, 2017


A DC-to-AC converter whose output is of desired output voltage and frequency is called an inverter. Based on their operation the inverters can be broadly classified into 
  1.  Voltage Source Inverters(VSI) 
  2.  Current Source Inverters(CSI) 
Helpful Material Related to Multilevel Inverters
A voltage source inverter is one where the independently controlled AC output is a voltage waveform. A current source inverter is one where the independently controlled AC output is a current waveform. On the basis of connections of semiconductor devices, inverters are classified as 
  1. Bridge inverters 
  2. Series inverters 
  3. Parallel inverters 
Some industrial applications of inverters are for adjustable- speed AC drives, induction heating, standby aircraft power supplies, UPS (uninterruptible power supplies) for computers, HVDC transmission lines etc.
There are many types of Inverters but I have figured out commonly used inverters:
  1. Square wave inverters
  2. Modified sine wave inverters
  3. Multilevel inverters
  4. Pure sine wave inverters
  5. Resonant inverters
  6. Grid tie inverters
  7. Synchronous inverters
  8. Stand-alone inverters
  9. Solar inverters


I have attached Student Thesis copy under a tilted “LEVEL INVERTER” from  DEPARTMENT OF EEE, ICET  in pdf form,  In this Thesis the author explained Multilevel inverter and other theory related to inverters from basic to professional in a conceptual way.  
This thesis is organized into Ten chapters. Chapter 1 presents Introductions to Multilevel Inverters and other switching techniques. Chapter 2 presents the LITERATURE SURVEY and discussed the past related work in a decent way. Chapter 3 focuses on different MODULATION SCHEMES.In this chapter, the author explained different modulations schemes such as PULSE AMPLITUDE MODULATION, PULSE WIDTH MODULATION, PULSE POSITION MODULATION, PULSE CODE MODULATION and at the end, he explained ADVANTAGES OF PWM. In Chapter 4 Author investigated working principle of SEVEN LEVEL INVERTER and it’s CONTROL STRATEGIES. In Chapter 5 Author discussed it,s simulation models and its output waveforms. THREE PHASE MULTILEVEL INVERTER have been discussed in Chapter 6. In Chapter 7 author presents the verified and final Hardware results of the 7 level inverter. Different Topologies of Multilevel inverters have been discussed in chapter 8. MULTILEVEL INVERTER HARMONICS ANALYSIS has been explained in chapter 9.  In Chapter 10 author concludes the thesis and discusses its future work. 

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