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Summary: 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. [ABSTRACT FROM AUTHOR]

This paper proposes two newly developed quasi Z-source inverters (QZSI) based on two new diode-cells. The proposed inverters are called continuous diode assisted quasi Z-source inverter (CDQAZSI) and discontinuous diode assisted quasi Zsource inverter (DDQAZSI). These inverters are thoroughly examined in three modes: two-cell QZSI, three-cell QZSI, and n-cell QZSI that is called developed QZSI. Additionally, the equations of the diodes' voltage and current, capacitors' voltage stress, boost factor, inductor currents, and dc-link current are computed. All equations are given for the proposed generalized topologies. The major advantage of these inverters is the potential of deriving desired boost factor value devoid of extra elements. Furthermore, increasing the number of the diode-cells used in the proposed QZSI reduces the values of dc-link current, inductor current, and diode current. Lastly, to verify the performance of the proposed topologies, the practicality of the proposed QZSI is authenticated by experimental results through a laboratory prototype. [ABSTRACT FROM AUTHOR]

In this study, a new topology for switched Z-source inverter is proposed. This inverter in comparison with the conventional Z-source inverter needs higher number of active elements, lower number of capacitors and inductors. Reduction of weight, size and cost are the main advantages of the proposed topology. In addition, this inverter is able to solve the problem of short circuit across the inverter leg and consists of higher value of voltage gain when compared with the conventional switched boost inverter. Moreover, the developed topology of the proposed inverter based on switched-inductor cells is introduced. The performance of the proposed inverter in different operating modes is investigated. The proposed topologies are also compared with the conventional Z-source inverters from different points of view such as number of elements, the voltage gain and capability of tolerate the inverter short circuit. Finally, the accuracy performance of the proposed inverter is reconfirmed by using the simulation results in EMTDC/PSCAD software and also experimental results. [ABSTRACT FROM AUTHOR]

In this paper, a new boost dc-dc converter based on voltage lift (VL) technique is proposed. There is any need for transformer, coupled inductances and sequential connections in the proposed boost converter topology. In this paper, the operating of proposed boost dc-dc converter in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) was discussed, and the current and voltage equations of the inductors and capacitors were obtained with details. So, the value of critical inductance and the operating of the proposed dc-dc converter between CCM and DCM were presented. The switching currents of each switch were analyzed. The switches, diodes, inductors and capacitors root-mean-square (RMS) current stresses were discussed. Finally, the correct performance of the proposed converter based on presented theoretical issues is verified by using simulation results on EMTDC/PSCAD software program and experimental results by using laboratory prototype. Copyright © 2015 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

In this paper, a new algorithm is proposed to determine the magnitudes of dc voltage sources in asymmetric cascaded multilevel inverters. Using this algorithm, it is possible to generate the maximum number of output voltage levels and maximum output voltage amplitude with minimum number of dc voltage sources. Using this algorithm, it is possible to use charge balance control methods to all dc sources except the minimum amplitude dc voltage source (first H-bridge). Therefore, the lifetime of dc voltage sources used in different H-bridges of cascaded asymmetric multilevel inverter except the first H-bridge are the same. As a result, the system's maintenance cost will be low. The simulation and experimental results confirm the abilities of the proposed method. [ABSTRACT FROM AUTHOR]