A Coupled Inductor Based High Step-Up Converter for DC Microgrid Applications

This paper presents an ultrahigh step‐up converter with combination of a quadratic boost converter, a multiplier cell, and a three windings coupled inductor. Main advantages of the converter include its high voltage gain, low voltage stress on the switch and most of the diodes, continuity of input current with low ripple, and existence of a common ground between the source and load. Furthermore, requiring small inductors leads to high efficiency performance of the converter. To confirm superiority of the proposed converter, it has been compared with the converters consisting coupled inductors. Analysis of the converter has been performed for its main operation modes to validate its quality and quantity factors. A prototype is built in order to experiment its performance per different conditions and evaluate the analysis. Rated values per the experiments are 25, 500, and 200 W for the input voltage, output voltage, and output power, respectively.

Section: Introductionmentioning

confidence: 99%

Ultrahigh step‐up DC‐DC converter consisting quadratic boost converter, multiplier cell, and three windings coupled inductor

Abbasi

Tanha

Rezaie

2022

“…As a result, soft‐switching techniques are introduced which play a key role in highly efficient converters. Some zero voltage switching (ZVS)‐based converters are discussed in previous studies 15–18 . In Mohseni et al, 15 a new high‐gain converter based on coupled inductor and SC multiplier cells is proposed.…”

Section: Introductionmentioning

confidence: 99%

“…This converter, however, has a discontinuous input current. Later, in Kothapalli et al, 18 a high‐gain converter based on coupled inductor and voltage multiplier cells is presented, with switches operating under ZVS condition. However, significant input current ripple and low voltage gain are major drawbacks.…”

Section: Introductionmentioning

confidence: 99%

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A single‐switch high‐gain DC–DC converter for photovoltaic applications

Kalahasthi

Ramteke

Suryawanshi

et al. 2021

Self Cite

This article presents a high-gain DC-DC converter consisting of a quadratic boost converter and a voltage multiplier, which helps to lift up the voltage gain. The gain will be further enhanced by increasing the turn's ratio of the coupled inductor. The key features include ultrahigh gain, low voltage stress across switching devices, low input current ripple, and hence, it is preferably suitable for renewable energy applications. A passive clamp lowers the voltage stress across MOSFET, so allowing switch with lower R ds(on) reduces the system cost. Besides this, input inductor makes current continuous and reduces input current ripple. The reverse recovery problem of diodes also gets diminished with the usage of leakage energy of the coupled inductor. The operating principle with different modes of operation is also explained. Zero current switching (ZCS) turn-on is achieved for power switch, and ZCS turn-off is achieved for diodes, which helps to reduce the switching losses. This improves the overall system efficiency. A 250-W prototype is built up to validate the converter.

“…In addition, an auxiliary circuit has to be used in this converter to clamp the voltage of these semiconductors. This set of factors decreases the voltage gain and the efficiency of the converter 7–9 …”

Section: Introductionmentioning

confidence: 99%

Voltage multiplier applied to boost DC–DC converter: Analysis, design, and performance evaluations

Hoch

Faistel

Toebe

et al. 2021

Summary This paper presents a new voltage multiplier with a small number of components, composed of a coupled inductor and a switched capacitor cell, which allow four different configurations. To evaluate these configurations, these cells were integrated into the boost converter, thus generating four new high voltage gain topologies. These topologies have different characteristics: thus, the principle of operation, voltage gain, voltage and current stress, and design guidelines of each converter were evaluated. Finally, four prototypes of 30 V/400 V and 200 W were built and evaluated experimentally.