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A class of half‐bridge quasi‐Z‐source inverters: Detailed steady‐state analysis in various operating states, design considerations, and derivation of general topology
Author(s) -
Sedaghati Farzad,
Shokati Asl Elias
Publication year - 2018
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2560
Subject(s) - topology (electrical circuits) , inductance , inverter , inductor , capacitor , voltage source , electrical impedance , engineering , power (physics) , electronic engineering , network topology , equivalent impedance transforms , half bridge , h bridge , boundary (topology) , voltage , control theory (sociology) , computer science , electrical engineering , mathematics , physics , mathematical analysis , control (management) , quantum mechanics , artificial intelligence , operating system
Summary In this paper, 2 types of half‐bridge quasi‐Z‐source inverters with detailed analysis are proposed. Unlike the classical half‐bridge inverter, both types of proposed half‐bridge inverters can generate zero voltage level in output. Moreover, lack of continuous input current in conventional half‐bridge inverters is resolved by the second type of proposed inverters. One of the important advantages of proposed inverters is using the 1 impedance network only with 2 capacitors and 2 inductors; whereas, most of the half‐bridge Z‐source inverters have more than 1 impedance network or use additional semiconductor elements. In this paper, operation principles of proposed inverters in different operating modes are discussed. Then, design considerations and calculation of critical Inductance in boundary conditions between 2 different states are provided. Next, power circuit of general topology with multiple DC sources and derivation of subcircuits are proposed. Finally, to verify validity of derived equations, simulation results using PSCAD/EMTDC software and experimental results are provided.