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In this study, a modified DC-DC converter is proposed, which can achieve a high voltage-gain exploiting both quasi-Z-source and switched-capacitor networks. In addition to the high voltage-gain, the proposed converter has low voltage stresses on its elements. The steady-state analysis in both continuous and discontinuous conduction modes is given in this study. Moreover, the design of the passive elements, the calculation of the non-ideal voltage gain, and the power loss analysis are done. Then, an extended topology of the proposed converter is presented, which further enhances the voltage gain, while maintaining the voltage stresses of the components. A comprehensive comparison with the prior-art converters is performed to accentuate the advantages of the proposed converter. Finally, simulations and experimental tests are provided to substantiate the theoretical analysis.

In this study, a new isolated high-gain switched-boost DC/DC converter employing two symmetrical switched-boost networks along with a modified control algorithm based on the combination of the pulse-width modulation (PWM) and phaseshift modulation is proposed. Utilising symmetrical switched-boost networks increase the voltage gain of the proposed converter, significantly. Moreover, applying the proposed switching algorithm on the proposed isolated switched-boost DC/DC converter leads to the following advantages: (i) high-voltage gain, (ii) zero voltage switching (ZVS) turn-on of two switches, (iii) ZVS turnoff of two switches and (iv) appearing three controllable parameters (the shoot-through duty cycle, the phase shift and the transformer turns ratio) in all of the equations including the voltage gain equation, which enhances the flexibility of the converter. In this study, the steady-state analysis, design procedure of the elements, and voltage and current stress of the semiconductors are given. Then, the proposed converter and the proposed switching algorithm are compared with similar converters and modulation techniques in order to highlight their features and drawbacks. Finally, experimental results are obtained to substantiate the theoretical analysis accuracy.

In this paper, a new non-isolated high voltage gain DC-DC converter using a combination of the modified quasi Z-Source and switched-capacitor networks is proposed. The proposed DC-DC converter has an acceptable number of elements and shows the low voltage stresses for its semiconductors and capacitors. Moreover, the voltage gain of the proposed converter is significantly high, where it can achieve high voltage gains with lower duty cycles compared to the other similar converters. In addition, the steady-state analysis is given along with the passive elements design. Then, the proposed converter is compared with similar converters to highlight its advantages and drawbacks. Finally, the simulation results in PSCAD/EMTDC software are given to validate the theoretical analysis.

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In this study, a new modified switched boost inverter (MSBI) is proposed. The proposed inverter presents higher voltage gain in comparison with conventional Z-source inverter and switched boost inverter. Moreover, the proposed inverter provides zero voltage switching turn-off of input voltage source side switches. In this study, the proposed converter is theoretically analysed in different operational modes along with design procedure and ripple analysis. The proposed MSBI is compared with similar works to evaluate its capabilities. Finally, a 50 kHz experimental prototype with input voltage of 40 V is used to verify the analysis and simulation results.

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