A new topology of converter fed multilevel inverter for medium to high power applications

作者：Malathi S^*; Chandramohan S

来源：Optoelectronics and Advanced Materials-Rapid Communications, 2015, 9(5-6): 816-820.

• Level generation unit
• Polarity generation unit
• Staircase modulation
• Power Factor Correction
• Unity power factor
• Total Harmonic Distortion

This paper proposes a novel PFC Boost converter fed multilevel inverter topology. Conventional bridge PFC Boost converter has high conduction losses in the input rectifier bridge and it gives poor power factor. High efficiency and UPF (unity power factor) can be achieved by this proposed closed loop controlled Bridgeless PFC Boost converter. This converter unit is fed to a new cascaded H-bridge seven-level inverter which has less number of switches and voltage sources compared to the existing inverters like diode clamped, flying capacitors and cascaded multilevel inverters. Therefore, the overall cost has greatly reduced. The term staircase modulation technique is used to control the proposed inverter. This control method tends to generate a staircase voltage. The proposed topology gives less Total Harmonic Distortion (THD) and high power output. So it can be used in high power applications like Marine and Industrial applications. Simulation work is carried out by using MATLAB/SIMULINK. Finally, a prototype of the proposed converter fed seven-level inverter topology is built and tested to show the performance and high output voltage of the converter fed inverter by experimental results.

• 出版日期2015-6