A class of half‐bridge quasi‐Z‐source inverters: Detailed steady‐state analysis in various operating states, design considerations, and derivation of general topology

Abstract

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.KEYWORDS half-bridge inverter, quasi-Z-source inverter, shoot-through, Z-source inverter

High‐voltage gain magnetically coupled half‐bridge Z‐source inverter

“…In return, another type of impedance-source inverters is half-bridge-based impedance-source topologies that the switching of the switches makes the working modes. [16][17][18][19] The benefits of the half-bridge-based impedance-source inverter upon the traditional half-bridge configuration generate a voltage level of 0V that produces the output voltage to have a better harmonic spectrum. Besides, the half-bridge-based impedance-source inverter has an immunity toward the ST state, leading this topology to have higher reliability.…”

“…All of the so‐surveyed topologies have two terminals; one is connected to the input voltage source, and the other is connected to the inverter side. In return, another type of impedance‐source inverters is half‐bridge‐based impedance‐source topologies that the switching of the switches makes the working modes 16–19 . The benefits of the half‐bridge‐based impedance‐source inverter upon the traditional half‐bridge configuration generate a voltage level of that produces the output voltage to have a better harmonic spectrum.…”

Trans Z‐source‐based half‐bridge inverter: A method for achieving high voltage gain

“…With the exception of the inverter side, all of the topologies that have been investigated so far have an impedance network. Other topologies that are entitled impedance‐source‐based half‐bridge inverters can be seen in previous studies 25–37 . The functioning modes of these topologies are determined by the switching states of the two switches used in the configuration.…”

A cost‐effective single‐phase semi flipped gamma type magnetically coupled impedance source inverters

“…Later, impedance source inverters (ISIs) are introduced 13–15 to achieve buck‐boost operation and dc–ac inversion operations in a single stage with inherent shoot‐through and open‐circuit protection. Many modified topologies of ISIs are reported in the literature, based on improved voltage gain, common‐mode voltage (CMV) reduction, and stress reduction techniques with advanced modulation methods 16–21 . The magnetically coupled impedance source (MCIS) inverter was introduced to achieve high voltage boosting with minimal components 22 .…”