Family of modular, extendable and high gain dc–dc converter with switched inductor and switched capacitor cells

Tewari, Nilanjan; Thazhathu, Sreedevi Vellithiruthi

doi:10.1049/iet-pel.2019.0163

Cited by 17 publications

(6 citation statements)

References 30 publications

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“…The switch voltages stress magnitudes for the converters presented in [43, 44] are similar. In [45], the switch experiences a voltage stress magnitude which is like the switch in a quadratic boost converter.…”

Section: Comparison Of the Proposed Converter With State Of Convertersmentioning

confidence: 89%

“…The output diode of the converter in [45] is subjected to a voltage stress which is about 27% of the output voltage. The output diode of the converter discussed in [43,44] experiences the highest voltage stress value compared to all the other converters. The output diodes of the converters presented in [41,42] and the proposed converter are subjected to a voltage stress value which is slightly more than 50% of output voltage.…”

Section: Normalised Voltage Stress Across the Switchesmentioning

confidence: 99%

“…However, since the structure of the converter presented in [32] is not modular in nature, the operating flexibility is reduced. The converter in [43] uses an extendable SLCL structure combined with voltage lifting capacitors to achieve high voltage gain.…”

Section: Comparison Of the Proposed Converter With State Of Convertersmentioning

confidence: 99%

See 2 more Smart Citations

Reconfigurable high step‐up DC to DC converter for microgrid applications

Tewari

Paul

Meenakshi

et al. 2023

IET Power Electronics

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Here, a high gain DC–DC converter which is based on switched capacitor (SC) and switched LCL (SLCL) cells is presented. The diode employed in the classical passive switched inductor (SI) cell is replaced by a capacitor in the proposed SLCL cell to achieve higher voltage gain. Two switches—one each in the positive and negative DC rails of the supply are employed to charge and discharge the inductors of SLCL cells. A generic structure comprising of N and M number of SLCL cells in the positive and negative DC rails respectively along with K number of SC cells is presented. To validate the proposed gain extension concept, a two‐switch based converter comprising of 2 SLCL and 1 SC cells is synthesized and its operation is described in detail. The voltage gain expression of the proposed SLCL‐SC converter is derived. Experimental results are obtained from a 25 to 380 V prototype converter which operates at a full‐load efficiency of 94.22% at 200 W. Since the switches employed in the proposed converter are operated at a moderate and safe duty ratio of D = 0.51, the voltage stress on the switches is about 25% of the output voltage while the diodes are subjected to even lesser voltage stress levels of only one‐fifth of the output voltage. The main salient features of the proposed topology are its (i) modular structure, (ii) ability to provide higher voltage gain values at lower duty ratios (iii) reduced voltage stress on the semiconductor devices and (iv) reduced conduction losses due to the replacement of diodes with capacitors in SLCL cells.

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Section: Comparison Of the Proposed Converter With State Of Convertersmentioning

confidence: 89%

Section: Normalised Voltage Stress Across the Switchesmentioning

confidence: 99%

See 1 more Smart Citation

Reconfigurable high step‐up DC to DC converter for microgrid applications

Tewari

Paul

Meenakshi

et al. 2023

IET Power Electronics

Self Cite

View full text Add to dashboard Cite

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“…In these converters, two switches are used, and input current is shared between these switches, resulting in low conduction losses. Also, due to the series discharge of inductors, a higher voltage gain can be attained [19][20][21][22][23][24][25][26][27][28][29]. Usually, this technique is combined with voltage multiplier cells to boost gain.…”

Section: Introductionmentioning

confidence: 99%

“…Another topology that has been investigated is the combination of an ASI and passive switched inductors (PSI), as presented in [26,31,32]. These topologies offer high voltage gain; however, they do come with two significant drawbacks.…”

Section: Introductionmentioning

confidence: 99%

High step up DC–DC converter with low conduction losses and reduced switching losses

Akhlaghi,

Karimi,

Adib

2024

IET Renewable Power Gen

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This article presents a novel high step up converter based on the active switch inductor (ASL) technique for renewable energy source applications. The coupled inductor technique provides an opportunity to increase the gain. The proposed converter exploited the leakage inductors to provide zero current switching (ZCS) turn‐on for both switches. Therefore, there is no need for an auxiliary circuit, which simplifies the structure. Also, all diodes turn off under ZCS, which eliminates the reverse recovery problem and results in reduced switching losses. The energy of the leakage inductor is recycled, and the voltage spike on the switches is limited. In addition, all semiconductor voltage stresses are clamped below the output voltage. Hence, components with lower on‐resistance can be utilized to reduce conduction loss. Because of the reduction in power loss, the efficiency rises to 97.2% at 250 W output power. It also benefits from the current sharing of the interleaved structure. The operating principles, design considerations, and comparison to other topologies are discussed. To verify the effectiveness of the proposed converter, a prototype converter with 250 W of output power, 50 V of input voltage, 500 V of output voltage, and 100 kHz of switching frequency is implemented.

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