High Gain Switched-Inductor-Double-Leg Converter With Wide Duty Range for DC Microgrid

Samiullah, -; Bhaskar, Mahajan Sagar; Meraj, Mohammad; Iqbal, Atif; Ashraf, Imtiaz; Kömürcügil, Hasan

doi:10.1109/tie.2020.3028794

Cited by 29 publications

(18 citation statements)

References 19 publications

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“…However, the converters mentioned so far are single duty type which lacks a widened range of duty ratio and can't be operated beyond a certain level of high duty ratio (around 0.8). An additional switch-diode pair is used in [19], [22], [26] to operate the converter in three modes of CCM to achieve the desired voltage at the output. The converters in [19], [22] constitute a high voltage across the diode and therefore a higher PIV rating diode is the prime requirement.…”

Section: Closed-loop Controlmentioning

confidence: 99%

Voltage Lift Switched Inductor Double Leg Converter With Extended Duty Ratio for DC Microgrid Application

et al. 2021

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In a DC microgrid, while integrating the low voltage sources such as Fuel cells and photovoltaics, an efficient DC-DC converter is crucially needed. Contributing to a high voltage whilst being operated on a low duty ratio is among the demanded features of the converter. For high voltage applications, the conventional converters are to be operated beyond the prescribed range of the duty ratio which may result in various detrimental effects such as voltage spikes, increased current ripples, and reduced efficiency. In this paper, a voltage lift switched inductor double leg converter (VLSIDL) has been proposed. This novel converter has the feature of attaining a very high voltage without using any complex circuitry such as transformer, multiple voltage lift circuits, cascaded or parallel structure, etc. This particular converter has three switches that are operated in three modes with two different duty ratios. Double duty control offers flexibility in the selection of duty ratio for a particular output voltage and a significantly high gain is easily attained. The double duty ratio not only provides an extended range but also improves the efficiency and performance of the converter. The steady-state analysis of the proposed converter is done analytically and the same is verified through the hardware prototype.

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Section: Closed-loop Controlmentioning

confidence: 99%

Voltage Lift Switched Inductor Double Leg Converter With Extended Duty Ratio for DC Microgrid Application

et al. 2021

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“…The voltage drop contributed by each circuit component is presented in (18)- (20). It is worth noting that the voltage gain of the proposed converter is limited by ON-state resistance of switches and diodes, ESR of inductors, and capacitors.…”

Section: Efficiency Analysis Of Proposed Convertermentioning

confidence: 99%

A hybrid switched inductor with flexible high voltage gain boost converter for DC micro‐grid application

Al‐Hitmi

Maroti

Iqbal

2021

IET Power Electronics

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A hybrid switched inductor with flexible high voltage gain boost converter for 400 V DC microgrid application is presented in the paper. The three operating modes of the converter are controlled using three switches by two-duty ratios. The proposed converter provides flexibility in the selection of the duty cycle to achieve desired output voltage. Moreover, with two duty ratio, high gain with a wide duty range is accomplished in the proposed converter while an individual switch does not need to operate at a very large duty ratio. The power circuit analysis, operating principles, steady-state voltage gain analysis during continuous conduction mode (CCM) and discontinuous continuous mode (DCM), boundary condition, efficiency analysis, comparison, and circuit parameter design of the proposed are presented. A closed-loop controller design and small-signal modeling are discussed. The dynamic behavior of the proposed converter is validated with a change in duty ratio, input voltage, and load power. A laboratory prototype converter is designed and developed to verify the model, and feasibility of different operation modes. The prototype is tested for a power range of 100 W-500 W for different duty cycles.

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“…However, if no isolation, the converter becomes bulky and costlier. Compared to [2], [5], [21], [24], the proposed converter can achieve the highest gain although using the same number of switching device and control logic. The proposed converter does not only possess the highest gain but also a proper selection of duty ratio, which will result in enhanced efficiency and low losses.…”

Section: Comparison Of High Gain Convertersmentioning

confidence: 99%

“…Combining multiplier cells with coupled inductors enhance the performance but on the cost of increased complexity and control. The switched inductor (SL) based converters are capable of achieving high gain at low duty ratio owed to their cross diode structure enabling inductors to be charged in parallel and discharged in series [21], [22]. Converters presented in [6] make use of SL units but the gain is still limited to around ten at the moderate duty of 70%.…”

Section: Introductionmentioning

confidence: 99%

Split Duty Super Boost Converter for High Voltage Applications in a DC Microgrid

et al. 2021

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In order to establish an appropriate interaction of a renewable DC generating source such as Photovoltaic or Fuel cells with a DC microgrid, there is need of some DC-DC converter with suitable attributes and features. Imparting high voltage at the low duty ratio is the most demanding quality of such converters. This paper introduces and explains the entire features and behavioral assessment of a novel split duty super boost converter (SDSB) involving switched structure of passive components for a partial contribution in the voltage boosting. The proposed converter is capable of attaining the highest voltage gain without any magnetic coupling, multi-staging/leveling, interleaving, or any complex networking. Additional features of the proposed converter includes its suppleness in duty ratio selection from an extended range, lower voltage stress across switches, low conduction losses, simpler and flexible control as well as enhanced reverse recovery of diodes with a continuous input current. The converter involves three switches where a splitting in duty ratio is realized for many possible positive outcomes including very low duty ratio operation of the switches. Theoretical analysis of the converter is elaborated in CCM, DCM along with the boundary conditions. Later, the performance is justified through developing a hardware prototype of 400 W for the input supply of 24 V.INDEX TERMS DC-DC converter, super boost, DC microgrid, split duty, high voltage gain, wide duty range.

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High Gain Switched-Inductor-Double-Leg Converter With Wide Duty Range for DC Microgrid

Cited by 29 publications

References 19 publications

Voltage Lift Switched Inductor Double Leg Converter With Extended Duty Ratio for DC Microgrid Application

Voltage Lift Switched Inductor Double Leg Converter With Extended Duty Ratio for DC Microgrid Application

A hybrid switched inductor with flexible high voltage gain boost converter for DC micro‐grid application

Split Duty Super Boost Converter for High Voltage Applications in a DC Microgrid

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