A High Gain DC-DC Converter Based on Coupled Inductor and Switched-Capacitor Cell with Low-Voltage Stress

Fard, Hamed Javaheri; Sadeghzadeh, Seyed Mohammad

doi:10.1155/2022/9323182

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…Solving this equation produces the results presented in Equations ( 17) and (18). Notably, Equation ( 16) can be solved by leveraging the fact that the average Vc 1 equals Vg, as indicated in Equation (12). The parameter (D1), denoting the discharging time of L 3 and L 4 , can be determined from Equation (18) after solving Equation (16).…”

Section: Voltage Transfer Gain In Dcmmentioning

confidence: 99%

A High-Efficiency DC-DC Converter Based on Series/Parallel Switched Inductor Capacitors for Ultra-High Voltage Gains

Algamluoli,

2024

Applied Sciences

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A high-efficiency DC-DC converter employing a modified architecture called the hybrid switched inductor–capacitor series (MHSLCS) is proposed in this paper. The primary goal is to achieve a notably ultra-high voltage gain for renewable energy systems (RESs). Furthermore, the use of only one input capacitor in the MHSLCS eliminates pulsations in the input current at both low and high duty ratios. The proposed converter integrates the MHSLCS with a modified switched capacitor (MSC) that interleaves with the main MOSFET, effectively doubling the voltage transfer gain. Additionally, a modified hybrid switched inductor–capacitor parallel (MHSLCP) is incorporated in parallel with an interleaved auxiliary MOSFET. Both MOSFETs, combined with the MSC, contribute to achieving an ultra-high voltage gain. In addition, the inductors of the MHSLCP operate in a discontinuous conduction mode (DCM), which results in significant stress reductions in the power diodes and switches at high output voltages. The advantages of the proposed converter are multifaceted, demonstrating a high efficiency while minimizing the voltage in power device diodes and MOSFETs. The use of low inductance and capacitance values at high switching frequencies further enhances the performance. Wide-bandgap (WBG) power devices are employed to achieve the desired high voltage gain and efficiency. The proposed converter was designed with a PCB and underwent experimental testing to validate laboratory results. The proposed converter boosted the input voltage from 30 V to a variable output voltage between 325 V and 500 V, with a power output of 325 watts and an efficiency of 95.5%.

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Section: Voltage Transfer Gain In Dcmmentioning

confidence: 99%

A High-Efficiency DC-DC Converter Based on Series/Parallel Switched Inductor Capacitors for Ultra-High Voltage Gains

Algamluoli,

2024

Applied Sciences

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“…This leads to more difficulties in establishing their small‐signal models and design on their control loops. High step‐up DC/DC converter based on pulse width modulation (PWM) technique and a voltage control loop are presented in previous works 27–29 . PWM is a linear control technique and generally takes long time to inhibit disturbances in the input and load of the converter.…”

Section: Introductionmentioning

confidence: 99%

One‐cycle controllability of high step‐up Boost converter with coupled inductor

Song

Chang

Liu

et al. 2023

Circuit Theory & Apps

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Comparing with traditional pulse width modulation technique, the transient performances of the high step-up DC/DC converters can be significantly improved by one-cycle control (OCC) technique, which is an appropriate control strategy for interface converters directly connecting the renewable energies to the DC microgrid. However, the suitability of OCC for these converters is rarely studied. One-cycle controllability of the high step-up DC/DC Boost converter with coupled inductor is studied with theoretical researches and experimental verifications. First, with the analysis on the operating modes of the converter, its periodic switched linear system model and the criterion for OCC are established. Furthermore, one-cycle controllability of the converter is calculated in detail. Final, a prototype of the high step-up converter from 48 to 380 V is prepared. Experimental results indicate that the disturbances in the input of the high step-up converter can be depressed within only one switching cycle. Ideal dynamic characteristic for the converter under disturbance in the output is also achieved. Results of this paper are meaningful for investigations on the transient characteristics of high step-up DC/DC converters applied to DC microgrid.

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Modular DC‐DC converter with reduced current ripple and low voltage stress suitable for high voltage applications

Babalou

Dezhbord

Maalandish

et al. 2022

Circuit Theory & Apps

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In this paper, a couple inductor‐based dc‐dc boost converter with extensible capability is presented. In the proposed converter, attaching extensions to input section alleviates input current ripple. Furthermore, the current sharing performance between different phases operates beneficially by expanding optimized boost converters, especially when a partial inequality exists among different switches' duty cycles and leakage inductances. The voltage conversion ratio of the proposed converter is also additionally optimized by a series of VMR's output capacitors. Meanwhile, not only the voltage stress upon the main switches is decreased but also the all switches are managed to be turned on with zero current switching technique. The voltage spikes across MOSFETs are eliminated by using the recycling energy of leakage inductances on the clamp capacitor. The topology of the proposed converter, steady‐state analysis, and design procedure is presented to indicate the merits of the suggested converter. A prototype circuit with a three‐phase interleaved boost converter, two number of diode‐capacitor in each VMR, and output power 660 W and 40–800 V conversion ratio is experimented to corroborate the validity of the presented structure.

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A High Gain DC-DC Converter Based on Coupled Inductor and Switched-Capacitor Cell with Low-Voltage Stress

Cited by 4 publications

References 32 publications

A High-Efficiency DC-DC Converter Based on Series/Parallel Switched Inductor Capacitors for Ultra-High Voltage Gains

A High-Efficiency DC-DC Converter Based on Series/Parallel Switched Inductor Capacitors for Ultra-High Voltage Gains

One‐cycle controllability of high step‐up Boost converter with coupled inductor

Modular DC‐DC converter with reduced current ripple and low voltage stress suitable for high voltage applications

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