Implementation of Cascaded H Bridge Inverter for Single Phase Ac Motor Drive
نویسندگان
چکیده
This paper presents the implementation of Single Phase 7 level Multilevel DC link (MLDCL) Inverter with Half Bridge Cell topology. For N level inverter, (N-1)/2 half bridge cells are required with the same number of voltage sources. In this inverter topology, 3 Half Bridge Cells are used along with 3 voltage sources, each have 100V DC. These half bridges are connected in series to form a Multilevel DC Link (MLDCL). Power IGBTs are used as switching device. Each half bridge cell uses two IGBTs whereas H-Bridge requires four IGBTs. In this inverter topology, eight Power IGBTs along with gate drive circuit. Inverter topology, under study reduced power switches. The performance of inverter checked on single phase induction motor. THD of proposed topology is reduced and analyzed by FFT window. The results are observed by MATLAB/SIMULINK software. KeywordsCascaded Multilevel Inverter, Multilevel DC Link, Cascaded Half Bridge Cells, H Bridge, Total Harmonic distortion (THD).
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