Low spikes and low harmonic distortion multilevel inverter for induction motor implementation

• Main Authors: Aboadla, Ezzidin Hassan Elmabrouk, Aznan, Khairil Azhar, Tohtayong, Majdee, Khan, Sheroz, Hannan, Mohammad A., Uddin, M. Nasir
• Format: Conference or Workshop Item
• Language: English; English
• Published: IEEE 2017
• Subjects: TK1001 Production of electric energy. Powerplants; TK3001 Distribution or transmission of electric power. The electric power circuit; TK4001 Applications of electric power
• Online Access: http://irep.iium.edu.my/58618/7/58618-Low%20Spikes%20and%20Low%20Harmonic%20distortion.pdf; http://irep.iium.edu.my/58618/13/58618_Low%20spikes%20and%20low%20harmonic_SCOPUS.pdf; http://irep.iium.edu.my/58618/; http://ieeexplore.ieee.org/document/8101760/

Different Modulation techniques are suggested for use in electronic converters’ applications for getting minimized Total Harmonic Distortion (THD). One of such techniques a Selective Harmonics Elimination Pulse Width Modulation (SHE-PWM) scheme. Specific odd harmonics can be mitigated by operating the semiconductor switches in H-bridge inverters at optimized switching angles of the PWM signals. These switching angles are determined by calculating a set of nonlinear equations. Multilevel converters operated by PWM, suffer from the issue of harmonic spikes in the output voltage. In this paper, an improved scheme of SHE-PWM is proposed for multilevel converter to mitigate THD and supress the harmonic spikes of the system. To investigate and confirm the proposed technique, a five-level cascade multilevel inverter is simulated, and experimentally implemented. It is seen that the simulation results are verified experimentally by eliminating low- order harmoinics in getting a THD of 23.20% without using filter. The experimental results of the developed multilevel converer is validated with the simulation results under different performance conditions which show a complete agreement between them in terms of shapes and values.