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

Zadeh

et al. 2022

Self Cite

This article offers a modified trans Z-source-based half-bridge inverter topology. A suitable pulse width modulation (PWM)-based control method is applied on the proposed inverter. Regarding this control technique, the state of switches in each of the operational states is obtained, and their equivalent control circuits are demonstrated and examined in depth. With the help of the results of these analyses, the boost factor for the proposed structure can be calculated. Additionally, the necessary equations for designing the passive components, as well as the power ratings of the active components, are found.Then, in order to evaluate the advantages and disadvantages of the proposed topology, a comparative study is conducted in several aspects, including the boost factor, the voltage stresses on capacitors, and the voltage stresses on passive devices. This comparison demonstrates that the proposed topology provides a high boost factor while minimizing voltage stresses on the devices, resulting in a smaller volume and size and a lower cost. Once the proposed topology has been thoroughly analyzed, the total power losses and the percentages of power losses consumed by each component device are calculated to obtain efficiency. Finally, an experimental prototype based on the equations for passive and active components is developed. Experiments are used to verify the validity of the proposed topology and the accuracy of the equations.

Section: Introductionsupporting

confidence: 78%

Section: Comparative Studymentioning

confidence: 99%

Section: Ratings Of Active Devicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Aalami

Zadeh

et al. 2022

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Embedded active impedance source inverter: Analysis and implementation

Ranjbarizad

Cecati

2022

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In this paper, a new active impedance source inverter with a suitable control method based on the pulse‐width modulation (PWM) technique is proposed. Based on the proposed control method, the analysis of the proposed inverter in different operating modes is given, and its boost factor is calculated. Then, the fundamental equations to design the values of inductors and capacitors are presented. Also, comparative analysis from different points of view, such as boost factor, voltage stresses on capacitors, and total voltage blocked by diodes and switches, between the proposed topology and conventional structures to examine the advantage and disadvantages is done. Comparison results show that the proposed topology has fewer voltage stresses on capacitors and total voltage blocked by diodes and switches. Also, it has fewer elements and continues input current and a more straightforward structure. The proposed topology's losses and efficiency at different loads are fully calculated. Finally, a prototype of the proposed topology is designed, and its experimental results along with simulation results by PSCAD to check the proposed topology's good performance and correctness of the obtained equations in different operating modes are provided.

Half‐bridge Z‐source inverter based on T‐source configuration with continuous input current and a high boost factor

Laali

Aalami

2022

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This paper proposes a new half-bridge-based impedance source inverter with coupled T-shaped inductors. The proposed inverter has a continuous input current and a high boost factor. The proposed topology is thoroughly investigated, along with its operating modes and control system, and the boost factor equation is derived. Additionally, the operating modes' results are incorporated into the design of used components, such as capacitors and inductors. To determine the suggested topology's advantages and disadvantages, a comparison with similar topologies is made based on the number of power electronic devices employed, the boost factor, and the voltage stresses experienced by the components. On the base of these comparisons, it is concluded that the proposed half-bridge-based Z-source inverter has a high boost factor, fewer power electronic components, and reduced voltage stresses. Following that, a power loss study is performed to ascertain the system's power losses and overall efficiency. The prototype's experimental results are considered to evaluate the proposed topology's correct performance.boost factor, continuous input current, half-bridge-based Z-source inverter, voltage stress on devices | INTRODUCTIONConventional inverters, notwithstanding their structural advancements, have certain key limitations. For example, the voltage source inverter (VSI) always operates in a buck mode regardless of the amount of the output voltage. In the same way, the current source inverter (CSI) is always used to boost the power. Furthermore, for VSI and CSI, the short circuit and open circuit states are not permitted. In return, by including an impedance network into the Z-source inverter, 1 it is capable of performing both buck operations and boost operations. Furthermore, the short circuit and open circuit states, often known as the shoot-through (ST) states, are the usual states for the Z-source inverter (ZSI). Because of its unique characteristics, the ZSI structure has recently piqued the interest of researchers in a variety of applications. 2-5 ZSI, however, has a limitation due to its discontinuous input current, which restricts its application. The quasi Z-source inverter (QZSI) with a continuous input current was introduced by Anderson and Peng. 6 Although the QZI has the same boost factor as the ZSI, it has fewer components and less voltage stress on the capacitors. In Loh et al., 7 a new structure known as the embedded Z-source inverter (EZSI) configuration is introduced. The ZSI and this structure have the same number of needed devices and boost factor, as demonstrated by the comparison. EZSI, on the