A Soft-Switched Ultra High Gain DC-DC Converter with Reduced Stress voltage on Semiconductors

Babalou, Milad; Dezhbord, Morteza; Alishah, Rasoul Shalchi; Hosseini, Seyed Hossein

doi:10.1109/pedstc.2019.8697533

Cited by 11 publications

(7 citation statements)

References 14 publications

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“…A modified SEPIC converter is presented in [32] to achieve high voltage gain. In [34] the converter uses parallel input and series output (PISO) technique to increase voltage gain. Furthermore, the stress voltage of switches and diodes has been reduced.…”

Section: Introductionmentioning

confidence: 99%

A New Transformerless Ultra High Gain DC–DC Converter for DC Microgrid Application

Khan

Zaid²,

Mahmood

et al. 2021

IEEE Access

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High gain dc-dc converters are used in several applications which include solar photovoltaic system, switch-mode power supplies and fuel cells. In this paper, an ultra-high gain dc-dc boost converter is proposed and analysed in detail. The converter has a gain of six times as compared with the boost converter. The high gain is achieved by utilizing switched inductors and switched capacitors. A modified voltage multiplier cell (VMC) with switched inductors is proposed. The converter has a single switch which makes its operation easy. Moreover, the voltage across the switch, diodes and capacitors are less than the output voltage which increases the overall efficiency of the converter. The converter performance in steady-state is analysed in detail and it is compared with other latest high gain converters. The working of the converter in non-ideal conditions is also discussed in detail. The loss analysis is done using PLECS software by incorporating the real models of switches and diodes from the datasheet. To confirm and validate the working of the proposed converter a hardware prototype of 200 W is developed in the laboratory. The converter achieves high gain at low duty ratios and its performance is found to be good in open and closed loop conditions. INDEX TERMSBoost Converter, DC Microgrid, Duty cycle, Ultra High Gain, Voltage stress Battery Fuel Cell High Gain DC-DC Converter Solar PV Cell Low DC Voltage (12-60V) High DC Voltage (200 -300V

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Section: Introductionmentioning

confidence: 99%

A New Transformerless Ultra High Gain DC–DC Converter for DC Microgrid Application

Khan

Zaid²,

Mahmood

et al. 2021

IEEE Access

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“…In recent years, the utilization of renewable energy sources such as solar photovoltaic and fuel cell has grown tremendously 1 . The output voltage of most renewable energy sources is incompatible with industrial use 2,3 . Therefore, a large number of high gain converters have been introduced in the field of dc‐dc energy conversion to obtain the desired voltage level of dc link for grid‐tied inverters 4 .…”

Section: Introductionmentioning

confidence: 99%

“…1 The output voltage of most renewable energy sources is incompatible with industrial use. 2,3 Therefore, a large number of high gain converters have been introduced in the field of dc-dc energy conversion to obtain the desired voltage level of dc link for grid-tied inverters. 4 Thus, the low-frequency transformer in the power system can be excluded, which is bulky and exorbitant, mainly if isolation is entirely unnecessary.…”

Section: Introductionmentioning

confidence: 99%

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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“…Nowadays, global warming and air pollution caused by fossil fuels and their unreliable future supplies provide further impetus for researchers to discover alternative sources of harmful and non-renewable sources [1][2][3]. Fuel cells (FCs) are one of the alternative sources owing to their renewability and environmentally friendly characteristics [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

An extendable soft‐switched high step‐up converter with near zero‐ripple input current suitable for fuel cell‐powered applications

Dezhbord

Babalou

Mohseni

et al. 2022

IET Renewable Power Gen

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In this paper, an extendable high step‐up topology is presented for the low input voltage applications, that is, fuel cell (FC) source. The proposed converter eliminates the pulsating input current and reduces the high input current ripple. Thus, the lifetime of this non‐linear source and energy flow is significantly improved. The high output voltage is achieved by using voltage multiplier cells (VMC) and a coupled inductor (CI) with reduced elements. Moreover, an auxiliary circuit is applied due to restoring the energy of leakage inductance in the CI. Therefore, not only all power switching devices are turned on under zero voltage switching (ZVS) but also the input current ripple is remarkably reduced to zero. Furthermore, normalized semiconductors’ voltage stresses are diminished. The reverse recovery problem of diodes and their turn‐off power losses at high frequencies are alleviated owing to their zero current switching (ZCS) turn‐off. In this paper, the performance of the proposed structure is investigated and compared with the traditional converters considering their voltage gain and voltage stress. Eventually, a 500‐W prototype of the proposed converter is built and tested to validate mathematical analyses.

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A Soft-Switched Ultra High Gain DC-DC Converter with Reduced Stress voltage on Semiconductors

Cited by 11 publications

References 14 publications

A New Transformerless Ultra High Gain DC–DC Converter for DC Microgrid Application

A New Transformerless Ultra High Gain DC–DC Converter for DC Microgrid Application

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

An extendable soft‐switched high step‐up converter with near zero‐ripple input current suitable for fuel cell‐powered applications

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