Boost type Partial Power Z-Source Converter

Nabinejad, Ali; Honarmand, Shahin; Rajaei, Amirhossein; Mardaneh, Mohammad

doi:10.1109/pedstc.2019.8697674

Cited by 7 publications

(1 citation statement)

References 22 publications

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“…In recent decades, impedance networks have been broadly used in step‐up converters. For example switched‐Z [6], Z [7], quasi‐Z [8–11], Y [12, 13], quasi‐Y [14], improved Y [15], T [16, 17], LCCT [18], Γ‐Z‐source [19], improved Γ [20], ∑‐Z‐source [21], A [22], Δ [23], P [24], and high‐frequency transformer‐isolated Z (HFTI‐Z) [25] impedance networks have been introduced and investigated for different step‐up topologies. Each impedance network provides a specific boost factor and can integrate into any power converters if possible.…”

Section: Introductionmentioning

confidence: 99%

Improving step‐up gain and efficiency in non‐inverting buck‐boost dc‐dc converter using quasi‐Z impedance network

Eshkevari

Mosallanejad

Sepasian

2021

IET Power Electronics

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In conventional non‐inverting buck‐boost converters (BBC), step‐up conversion requires high duty cycles, unlike the step‐down conversion. This problem decreases the BBC efficiency in the step‐up mode. Here, an improved non‐inverting BBC is proposed, designed based on a quasi‐Z impedance network. In this topology, the step‐up conversion is done with a higher boost factor and lower duty cycles. By reducing the step‐up duty cycle, the efficiency has been increased. In this BBC, the voltage‐stress on power semiconductors is the same as the conventional type; however, the efficiency improves as power switches operate with lower duty cycles. This article presents the operating principle of the proposed topology in detail. This new topology is compared with previous topologies regarding efficiency, components, voltage, and current stresses on semiconductors, boost‐factor, and implementation cost. Sensitivity analysis results are shown to obtain the effect of the parasitic elements on the converter operation. Simulation and experimental results are also presented to evaluate the topology and its operation. Results confirm the proposed topology. This converter can be used in photovoltaic (PV) based systems like PV‐based electric vehicle (EV) charging systems.

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