Novel High Step-Up Soft-Switching DC–DC Converter Based on Switched Capacitor and Coupled Inductor

Zhang, Xiangjun; Sun, Lei; Guan, Yueshi; Han, Shouheng; Cai, Hongye; Wang, Yijie; Xu, Dianguo

doi:10.1109/tpel.2020.2972583

Cited by 46 publications

(26 citation statements)

References 24 publications

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“…By introducing small magnetic components or utilizing parasitic inductances, the typical SCCs can achieve resonant or phaseshift operations, thus regulating voltage conversion ratio and reducing both switching losses and electromagnetic interferences (EMI) [68]- [82]. On the other hand, a combination of coupled inductors and switched capacitors is also broadly adopted in high voltage gain situations [59]- [92], [89]- [97]. Their common feature is using coupled inductors to lift the voltage of capacitors and perform the discharging of the switched capacitors in series.…”

Section: Coupled Inductor Converters With Basic Modulesmentioning

confidence: 99%

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Review of High-Frequency High-Voltage-Conversion-Ratio DC–DC Converters

Guan

Cecati

Alonso

et al. 2021

IEEE J. Emerg. Sel. Top. Ind. Electron.

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Section: Coupled Inductor Converters With Basic Modulesmentioning

confidence: 99%

“…One example of stacked three windings coupled inductor SCC is shown in Fig. 27 [97]. It is based on the topology in [91], and it adds one more winding of the coupled inductor to further increase the voltage gain.…”

Section: B) Three-winding-based Convertersmentioning

confidence: 99%

Review of High-Frequency High-Voltage-Conversion-Ratio DC–DC Converters

Guan

Cecati

Alonso

et al. 2021

IEEE J. Emerg. Sel. Top. Ind. Electron.

Self Cite

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“…Regarding the disadvantage of these converters, the leakage inductance increases by increasing the turns ratio of the coupled inductor, which can cause problems such as voltage spikes and stresses across the power switches. The voltage spikes on the power switch reduced by using active 21,22 and passive clamp 23,24 circuits, but the converter structure has become more complex and expensive. Providing zero-voltage switching (ZVS)/zero-current switching (ZCS) conditions for the power switches is considered as the advantage of using a clamping circuit.…”

Section: Introductionmentioning

confidence: 99%

A novel soft‐switched interleaved high step‐up DC–DC converter for high‐efficiency conversion

Sadighi

Afjei

Salemnia

2021

Circuit Theory & Apps

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The present study aims to present a new interleaved soft-switched high stepup DC-DC converter, which is suitable for renewable energy sources, by integrating built-in transformer. A high conversion ratio is achieved by adjusting the turns ratio of the built-in transformer and duty cycle. The proposed converter uses active clamped circuit, which provides zero-voltage switching (ZVS) and a zero-current switching (ZCS) operation for all switches and diodes, respectively. Therefore, the losses caused by reverse recovery are considerably alleviated by providing ZCS condition in the diodes. The proposed structure has some advantages such as low-voltage stress across power switches, very low-input current ripple, fewer components, and lower cost.The MOSFET with low drain-source resistance can be used due to the lowvoltage stress, which could reduce conduction losses. Furthermore, a 500-W, 48-V input to 380-V output laboratory prototype is built and tested to validate the performance of the proposed topology.

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“…Furthermore, high rating power switches have more considerable drain–source on‐resistance, which increases the conduction losses of the converter. To reduce the voltage stress on the switches, active [22, 23] or passive [24] clamping circuit is used to provide zero‐voltage switching (ZVS) and zero‐current switching (ZCS) operations for the switches. The use of voltage multiplier cells is considered to be one of the ideas for increasing the voltage gain in such converters [25, 26].…”

Section: Introductionmentioning

confidence: 99%

High step‐up DC–DC converter based on coupled‐inductor for renewable energy systems

Sadighi

Afjei

Salemnia

2020

IET power electron.

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The present study introduced a novel soft‐switched high step‐up DC–DC converter based on coupled inductors. The higher boost‐factor is achieved relying on previous topologies by adjusting the turns ratio of the coupled inductors. Thus, the proposed converter provides a higher voltage gain with lower duty ratios. Two active clamp circuits are employed to clamp the voltage spikes resulted from parasitic inductances. This active clamp circuit provides zero‐voltage switching turn‐on operations and zero‐current switching turn on/off operations for active switches and power diodes, respectively. In addition, the equivalent leakage inductance of the coupled inductors is placed in series with the power diodes, which significantly alleviates the reverse‐recovery problem of diodes. The other features of the proposed topology include fewer components, low cost, small input current ripple, and the low voltage stress on power switches. Low voltage stress allows choosing a lower voltage rating metal–oxide–semiconductor field‐effect transistor, which directly reduces the cost. The experimental results evaluated the performance of the proposed topology. For this purpose, a 48 V/380 V/500 W laboratory prototype was built and tested, and the results confirmed the performance of the presented converter.

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Novel High Step-Up Soft-Switching DC–DC Converter Based on Switched Capacitor and Coupled Inductor

Cited by 46 publications

References 24 publications

Review of High-Frequency High-Voltage-Conversion-Ratio DC–DC Converters

Review of High-Frequency High-Voltage-Conversion-Ratio DC–DC Converters

A novel soft‐switched interleaved high step‐up DC–DC converter for high‐efficiency conversion

High step‐up DC–DC converter based on coupled‐inductor for renewable energy systems

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