Analysis of the non‐isolated step‐up network based on impedance source converter

Abstract

A new topology of the high step-up Z-source converter is proposed, which does not need to work at high duty cycles to increase the voltage gain. In other words, this converter can generate high voltage gain in low duty cycles. In addition to these advantages, the converter has advantages such as low voltage stress across the passive components, common ground between the input and output, and continuous input current. The proposed converter will be analysed in shoot-through and non-shoot-through operating modes, and then, the minimum size of the used elements in the converter will be calculated and designed, then the loss analysis has occurred. Finally, the experimental results are presented to validate the claims, and the closed-loop control is given for the proposed converter.

High conversion ratio buck–boost DC–DC converter based on coupled inductor

“…according to this figure, the proposed converter has low voltage stress than the converters presented in [17] and [18]. Also, the proposed converter has high voltage stress across the converters presented in [10, 22, 14, 21, 20, 29], but the proposed converter has high voltage gain than some of them. Also, the maximum voltage stress across the diodes is shown in Figure 10b.…”

“…Due to the use of a coupled inductor in the proposed converter structure, the output voltage of this converter in the boost state is higher than the converters presented in [17,16,15,13,28,20,18,14]. According to Table 2, it can be seen that the sum of maximum voltage stress across the power electronic switch in the proposed converter is less than the voltage stress across the converter switches presented in references [15,20,10,13]. According to Table 2, it can be seen that the sum of maximum voltage stress…”

“…DC-DC converters, also known as choppers, convert electrical energy from one voltage level to another for use in different industry applications [7,8]. Choppers are usually available in buck, boost, and buck-boost [9][10][11].…”

Improved High Step-Up Cockcroft-Walton Magnetic Coupling Inverter

“…The most popular magnetically coupled structures can be named Trans Z-source [4][5][6], A-source [7][8], Γ-source [9][10], and Y-source [11][12] networks. Despite all privileges of these topologies, they suffer from a major drawback; that is huge voltage spikes appear across the power switches because of the coupled inductors' leakage inductances.…”

An extendable step‐up/down DC–DC converter based on switched capacitors

“…In addition, power electronic converters are widely employed for numerous industrial applications such as FACTs, HVDC, heating & cooling, cooking etc. [1][2][3]. Among DC-DC power converters, stepup/down DC-DC converters are the most popular choices for many applications, such as regulating the variable voltage of intermittent renewable energy sources (RESs) [4][5][6].…”