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Kannabhiran, A.
- Novel Hybrid Multilevel Inverter with Minimum Number of Switches
Authors
1 Department of Electrical and Electronics Engineering, Sethu Institute of Technology, Virudhunagar 626115, Tamilnadu, IN
2 Department of Electrical and Electronics Engineering, Sudharsan Engineering College, Sathiyamangalam - 622501, Tamilnadu, IN
3 Department of Electronics and Communication Engineering, Sudharsan Engineering College, Sathiyamangalam-622501, Tamilnadu, IN
Source
Artificial Intelligent Systems and Machine Learning, Vol 4, No 2 (2012), Pagination: 77-81Abstract
This paper proposes a novel trinary hybrid multilevel inverter for medium voltage applications. The main disadvantage of the conventional topology is the large number of power supplies and semiconductors required to obtain multistep voltage waveforms. The proposed topology significantly reduces the number of IGBTs and their gate driver circuits as the number of output voltage level increases. Single carrier sinusoidal modulation (SC-SPWM) technique is used in this topology which provides variable voltage and variable frequency operation. The proposed inverter can synthesize high quality output voltage near to sinusoidal waves. The circuit configuration is simple and easy to control. The operational principle and key waveforms are illustrated and analyzed. To validate the proposed topology, the circuit is simulated and verified using MatLab/Simulink.Keywords
Hybrid Multilevel Inverter, Single Carrier Sinusoidal Pulse Width Modulation (SC-SPWM), Trinary DC Sources.
- Cascaded H-Bridge Multilevel Inverter Using Multi Winding Transformer and Single DC Input with Single Carrier Sinusoidal PWM Control
Authors
1 Department of Electrical and Electronics Engineering, Sethu Institute of Technology, Virudhunagar-626115, Tamilnadu, IN
2 Department of Electrical and Electronics Engineering, Sethu Institute of Technology, Virudhunagar - 626115, Tamilnadu, IN
3 Department of Electrical and Electronics Engineering, Sethu Institute of Technology, Virudhunagar 626115, Tamilnadu, IN
4 Department of Electrical and Electronics Engineering, Sudharsan Engineering College, Sathiyamangalam-622501, Tamilnadu, IN
Source
Artificial Intelligent Systems and Machine Learning, Vol 4, No 1 (2012), Pagination: 21-25Abstract
This paper proposes single carrier sinusoidal PWM based cascaded H-bridge multilevel inverter which employs single dc input power source with isolated unequal turns ratio low-frequency power transformers. Generally cascaded H-Bridge inverters are used to generate levels under trinary fashion switching scheme, where, n represents the number of H-Bridges used. In this topology three H-Bridges are used and hence 27 levels are achieved with single DC input and multi winding transformer unit. Hence harmonics are reduced in the output level. Therefore, an economical and efficient inverter can be designed. In this proposed topology trinary switching pattern is used to achieve the desired levels. Single carrier sinusoidal modulation (SC-SPWM) technique is used which provides variable voltage and a variable frequency supply. The effectiveness of the system is verified through simulation using MATLAB/Simulink.