Non‐isolated high gain DC–DC converter with low device stress and input current ripple

Revathi, B. Sri; Prabhakar, M.

doi:10.1049/iet-pel.2018.5556

Cited by 52 publications

(43 citation statements)

References 31 publications

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“…In Stage 1, the QBC structure is arranged in an interleaved fashion. The voltage gain of one QBC structure is derived in Ye 19 and given by Equation (12).

M_{QBC} = \frac{1}{{((), 1 - δ)}^{2}},

where δ is the duty ratio of the single switch adopted in a regular or conventional QBC.…”

Section: Voltage Gain and Design Detailsmentioning

confidence: 99%

“…The two converters yield a relatively lower voltage gain of about 6.66 and 8.33 respectively. The outputs obtained from the two‐phase interleaved structure employing CIs and diode‐capacitor multiplier (DCM) cells are carefully cascaded in Sri Revathi and Mahalingam 19 to obtain a voltage gain of 21.11. Due to higher component count and incremental losses, the practical voltage gain value and power handling capability is constrained.…”

Section: Introductionmentioning

confidence: 99%

“…Fortunately, the input current ripple is reduced by adopting zero ripple boost cell combined with CIs 27 and interleaving technique while retaining the converters' high gain capabilities 19,24,28‐30 . In Sri Revathi and Mahalingam 19 and Samuel et al, 24 by operating the switches in the two‐phase interleaved structure in a complementary manner, the current ripple content at the input side is eliminated. By modifying the windings of cross‐coupled inductor (WCCI), the input current ripple is minimized 28 .…”

Section: Introductionmentioning

confidence: 99%

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Ultra‐high gain DC‐DC converter based on interleaved quadratic boost converter with ripple‐free input current

Samuel

Keerthi

Prabhakar

2020

Int Trans Electr Energ Syst

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Background In this paper, an ultra‐high gain DC‐DC converter (UHGC) which provides a very high voltage conversion ratio value of 21.11 is described. Methods The proposed UHGC is synthesized from a two‐phase interleaved quadratic boost converter (IQBC). The voltage gain of the IQBC is further extended by using the voltage‐lift technique. To meet the standard DC voltage level of 380 V across the load terminals, the output of the voltage‐lifted IQBC is cascaded to a conventional boost converter (CBC). By operating the switches located in the IQBC stage with a duty ratio of 0.5 and 180° phase‐shift, the source current ripples are nullified. Besides drawing a smooth and ripple‐free current from the input, the converter's voltage gain is adjusted by varying the duty ratio of the switch employed in the CBC stage. Results The proposed gain extension concept is practically validated by conducting experiments on 18‐380 V, 150 W prototype converter. Under practical conditions, the proposed converter operates at full‐load efficiency of 94.7%. Moreover, due to the proposed gain enhancing technique, the two switches employed in the IQBC stage are subjected to low voltage stress levels which are 18.95% of the output voltage. By employing a simple closed‐loop control technique, the output voltage is regulated to remain constant at 380 V despite variations in line voltage and load current magnitudes. Conclusion The proposed UHGC possesses some advantageous features like (i) high voltage gain capability, (ii) ability to draw smooth and continuous (ripple‐free) current from the input, (iii) flexible structure which provides the required high voltage gain while drawing smooth current from the source and (iv) ability to quickly regulate the output voltage using simple closed‐loop control. Thus, the proposed UHGC is an appropriate choice for integrating the input PV source to a common DC bus or microgrid.

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“…In Stage 1, the QBC structure is arranged in an interleaved fashion. The voltage gain of one QBC structure is derived in Ye 19 and given by Equation (12).

M_{QBC} = \frac{1}{{((), 1 - δ)}^{2}},

where δ is the duty ratio of the single switch adopted in a regular or conventional QBC.…”

Section: Voltage Gain and Design Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultra‐high gain DC‐DC converter based on interleaved quadratic boost converter with ripple‐free input current

Samuel

Keerthi

Prabhakar

2020

Int Trans Electr Energ Syst

Self Cite

View full text Add to dashboard Cite

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“…Implementation of renewable energy sources requires DC-DC converters for boosting their voltage [1][2][3][4][5]. Conventional converters with boosting voltage gain seems good for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Effective combination of quadratic boost converter with voltage multiplier cell to increase voltage gain

Rezaie

Abbasi

2020

IET Power Electronics

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This study proposes a high step-up DC-DC converter based on quadratic boost converter. The proposed converter is composed of a quadratic boost converter and a multiplier cell. The converter can be used in low power applications which need to increase output voltage with high gain. In order to reduce number of the components, the multiplier cell is composed with the quadratic boost converter in a way to share one of their inductors. The found location of the multiplier adds some advantages to the proposed converter in comparison to the similar converters. The converter advantages include higher voltage gain, lower voltage stress on diodes and capacitors and requiring smaller inductors. To verify the points, principle operation of the converter is analysed and it has been compared with other converters. The proposed converter is designed and implemented using its main equations. Experiments are done along the lines of the analysis to prove that they have good accordance with each other. Operation quality factors such as voltage stress, voltage gain, efficiency, dynamic of the converter and operation in transient conditions are investigated using the experiments.

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“…It is basically a combination of conventional DC/DC converter in parallel arrangement. There are advantages of using multiphase configurations, such as reduction of current stress, high current output, low conduction loss, and high efficiency [4][5][6][7][8]. Besides, the size and rating of the components are reduced due to the split of input current into each circuit path.…”

Section: Introductionmentioning

confidence: 99%

Design and development of PWM switching for 5-level multiphase interleaved DC/DC boost converter using FPGA

Ganı

Bakar

Ponniran

et al. 2020

IJEECS

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<p>The continuously increasing demand for control on electric power equipment has led to the rapid technological development in various applications such as renewable energy, electric drives, and communication. Pulse Width Modulation (PWM) switching is an important technique to control the output voltage. PWM signals can either be generated using digital controller or analog controller. Digital controllers are widely used to generate PWM signals due to their reliability in solving complex algorithms within short amount of time. Multiphase boost converter is capable to overcome high input current ripple, current stress and semiconductor losses in conventional boost converter. This paper proposes a PWM switching scheme for multiphase interleaved converter using Field Programmable Gate Array (FPGA). The proposed switching scheme uses PWM switching technique that is implemented by programming Altera DE2-70 board. The duty cycle can be easily adjusted using assigned switches on the Altera board. For validation, switching frequency was set to 100 kHz, and then switching signal was observed using oscilloscope.</p>

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Non‐isolated high gain DC–DC converter with low device stress and input current ripple

Cited by 52 publications

References 31 publications

Ultra‐high gain DC‐DC converter based on interleaved quadratic boost converter with ripple‐free input current

Ultra‐high gain DC‐DC converter based on interleaved quadratic boost converter with ripple‐free input current

Effective combination of quadratic boost converter with voltage multiplier cell to increase voltage gain

Design and development of PWM switching for 5-level multiphase interleaved DC/DC boost converter using FPGA

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