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

Abstract

In this paper, a new impedance-source inverter based on the half-bridge configuration is presented. The proposed topology has two switches that make four working modes. These operational modes are analyzed in detail, leading to obtaining the proposed topology's boost-factor. Besides, some equations are derived that are used to design passive elements such as capacitors and inductors. Besides, the voltage stresses on the switches and diodes are obtained. A comparative study from the boost-factor point of view is depicted, which shows that the proposed topology brings a high boost-factor at the output stage. By utilizing transformers, this topology gains a high boost-factor which can be adjusted by changing transformers' windings' turn. In addition to this comparison, other detailed comparisons show that the proposed topology has a reduced number of components with reduced voltage stresses on the passive devices. Finally, to verify the proposed topology's valid performance, a prototype is designed, and its results are studied.

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

“…Although a high boost factor can be obtained by increasing the number of these cells, the count of the passive components gets high dramatically. Aalami et al 33,34 present another topologies similar to the presented one in Aalami et al 34 Other three similar topologies can be found in previous studies. [35][36][37] In these structures, the components count is relatively low, and they can give a high boost factor regarding the use of transformers.…”

“…In this part, the proposed topology is contrasted with the current topologies in previous studies, 16–37 and the results are discussed. It is clear from (57) that the maximum output voltage of the proposed topology is determined by the sum of the magnitudes of the two voltage sources used.…”

“…Furthermore, the inverse voltage peaks on D 1 and D 2 are represented by the PIV D1 and PIV D2 variables. Additionally, the present ratings of these devices can be defined as follows, by having ( 16), (34), and (52):…”

“…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.…”

“…Other topologies that are entitled impedance-source-based half-bridge inverters can be seen in previous studies. [25][26][27][28][29][30][31][32][33][34][35][36][37] The functioning modes of these topologies are determined by the switching states of the two switches used in the configuration. The half-bridge structure as the most fundamental inverter design is capable of generating two voltage levels at the output stage.…”