High Step-Up Resonant DC–DC Converter With Ripple-Free Input Current for Renewable Energy Systems

Seok, Hwasoo; Han, Byeongcheol; Kwon, Bong-Hwan; Kim, Min Soo

doi:10.1109/tie.2018.2818653

Cited by 49 publications

(11 citation statements)

References 17 publications

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“…Stage 2 [t1~t2]: At t=t1, regenerative diode Dr turns on and output diode Do turns off; both switches Q1 and Q2 remain in ON states, resulting in linear increases of the current for magnetizing inductances Lm1 and Lm2; capacitor Cm begins to charge, and the primary winding's current direction is reversed for both CIs; the energy to the load is provided by output capacitor Co. For this stage, the key relationships as (2).…”

Section: B Operating Analysis Of the Proposed Convertermentioning

confidence: 99%

An Interleaved Quadratic High Step-Up DC-DC Converter With Coupled Inductor

Rahimi¹,

Habibi²,

Ferdowsi³

et al. 2021

IEEE Open J. Power Electron.

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A new high step-up DC-DC converter for renewable energy applications is proposed in this paper. Employing an interleaved quadratic structure, two two-winding coupled inductors (CIs), and voltage multiplier cells (VMCs), the proposed converter can provide high-voltage gains, continuous input current with low ripple, reduced voltage stresses on semiconductors, common ground between input and output sides, and low numbers of components. In addition, diode-capacitor lossless clamp circuits are utilized to limit the voltage stresses of the power switches and further extend the voltage gain. The operating and steadystate analyses, design considerations, and a comparison with other previously published high step-up converters are presented.

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Section: B Operating Analysis Of the Proposed Convertermentioning

confidence: 99%

An Interleaved Quadratic High Step-Up DC-DC Converter With Coupled Inductor

Rahimi¹,

Habibi²,

Ferdowsi³

et al. 2021

IEEE Open J. Power Electron.

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“…Fuel cells (FCs) and other renewable energy sources are a compelling alternative to conventional pollution-prone power sources [1][2][3][4]. However, there are additional relevant challenges that must be solved to propagate them.…”

Section: Introductionmentioning

confidence: 99%

“…Another important challenge is related to the low amplitude of the output voltage; the output voltage of the fuel cell must be increased and regulated to feed a grid-tie inverter. For instance, the voltage of a traditional fuel cell (FC) stack can be in the order of dozens of volts, while the DC bus voltage requirements for a grid tie inverter are several times higher [1,2]. Furthermore, the input current of some power converters can be a discontinuous signal or a continuous signal with a large switching ripple (variations due to the switching action).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the input current of some power converters can be a discontinuous signal or a continuous signal with a large switching ripple (variations due to the switching action). This current is drawn from the fuel cell, with a negative impact on the lifetime and performance of fuel 2 of 17 cells, as mentioned in several investigations [1,2]. The negative effect of distorted current signals on fuel cells has motivated new investigations [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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A Double Dual Boost Converter with Switching Ripple Cancellation for PEMFC Systems

et al. 2020

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This paper presents a current-based control for a proton-exchange membrane fuel cell using the so-called double dual boost topology. In particular, we introduce a discrete time controller that, in coordination with a particular selection of inductors and capacitors, minimizes the switching ripple at the input port (current ripple) and the output port (voltage ripple) of the double dual boost converter. This converter has a particular characteristic, in contrast to the classical interleaved boost topology, in the double dual boost, the phases of the converter can have different duty ratios. The freedom to choose the duty ration for each phase can be used to select the operative point in which the input current is equal to zero. However, if individual controllers are used for each branch of the converter, the equilibrium after a transient can differ from the minimum ripple operation point; the proposed scheme regulates the output voltage and, at the same time, ensures the equilibrium remains in the minimum ripple operation in steady state. In this way, the converter can mitigate the harmonic distortion on the current extracted from the proton-exchange membrane fuel cell, which is beneficial to improve the efficiency and lifetime of the cell, and on the output voltage delivered to an output direct current bus. The results of the experiment are presented to validate the principles of the proposed system.

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“…A dual series resonant converter can operate with decreased switching losses on the diodes, while the power transfer to the output can be provided without any interruption among the negative and positive operation cycles [8]. In a high step-up resonant converter, an input-current doubler and a special switching mechanism can be used to accomplish high step-up voltage gain to avoid a high turn-ratio transformer [9]. A special, LL (two inductors) switch-capacitor quasi-resonant converter can reduce the volume of magnetic components in the circuit [10].…”

Section: Introductionmentioning

confidence: 99%

Control features of a four channel resonant buck converter

Litvani

Hamar

2019

IET Power Electronics

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This study presents the steady-state behaviour of a new four channel resonant DC/DC buck converter in symmetrical operation both in continuous current conduction mode (CCM) and in discontinuous current conduction mode (DCM). Having two inputs and four outputs, one of the most important advantages of this converter is its capability to provide four identical or arbitrarily different output voltages, while power exchange between the input channels facilitates the smooth operation even when one of the inputs falls out (security power supply). The converter can be operated in zero-current switching and zerovoltage switching conditions that results in enhanced efficiency. The quasi-sinusoidal waveforms help to lower electromagnetic interference. The analysis revealed the relations among input and output voltages as well as the effect of control variables on the steady-state operation. The obtained theoretical results are verified by both computer simulations and measurements on a recently built experimental prototype. The analytical results and control characteristics are devoted to design such converters and develop control strategies for them.

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High Step-Up Resonant DC–DC Converter With Ripple-Free Input Current for Renewable Energy Systems

Cited by 49 publications

References 17 publications

An Interleaved Quadratic High Step-Up DC-DC Converter With Coupled Inductor

An Interleaved Quadratic High Step-Up DC-DC Converter With Coupled Inductor

A Double Dual Boost Converter with Switching Ripple Cancellation for PEMFC Systems

Control features of a four channel resonant buck converter

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