Ultra‐step‐up dc–dc converter with low‐voltage stress on devices

Jalilzadeh, Tohid; Rostami, Naghi; Babaei, Ebrahim; Maalandish, Mohammad

doi:10.1049/iet-pel.2018.5356

Cited by 46 publications

(43 citation statements)

References 29 publications

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“…Evidently, the proposed UHGC provides the highest voltage gain of 21.11 while the voltage gain of other converters is less than 18 at the practical operating point. The voltage gain of the converter discussed in Tohid 12 depends on the charge pump capacitor and the number of VM networks. The converters presented in Yang 18 and Wang et al 25 depend on the turns‐ratio of CI while the voltage gain of the converter in Valdez‐Resendiz et al 22 is dependent on the number of stacked stages.…”

Section: Benchmarking the Proposed Uhgcmentioning

confidence: 99%

“…The proposed UHGC is a three‐switch converter, while the other converters compared in Table 4 employ only one switch. The converter described in Tohid 12 uses a self‐lift circuit along with a charge pump capacitor and VM network for extending the voltage gain. Therefore, the stress on the lone switch is about one‐third (34.2%) of the output voltage.…”

Section: Benchmarking the Proposed Uhgcmentioning

confidence: 99%

“…and their voltage stress range from 44% to 100% of V 0 . The remaining converters presented in Tohid, 12 Yang 18 and Wang et al 25 employ some sort of gain extension mechanisms. Therefore, the voltage stresses on their diodes are significantly reduced.…”

Section: Benchmarking the Proposed Uhgcmentioning

confidence: 99%

“…Nevertheless, the practical voltage gain value is restricted due to higher component count and its associated power loss. The converter presented in Jalilzadeh et al, 12 employs a charge pump capacitor combined with self‐lift and VM network. The number of VM networks employed determine the practical voltage gain; the voltage gain values are 6, 9 8, 10 10 11 and 17.52 12 …”

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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Section: Benchmarking the Proposed Uhgcmentioning

confidence: 99%

Section: Benchmarking the Proposed Uhgcmentioning

confidence: 99%

Section: Benchmarking the Proposed Uhgcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…Another drawback is that the operational conditions influence the output voltage of the renewable sources. To provide high‐reliable power to the loads, the renewable sources with different V‐I characteristics should be combined . Consequently, in such a hybrid system, multi‐input high step‐up DC‐DC converters play an important role as an interface between the various types of renewable sources and load .…”

Section: Introductionmentioning

confidence: 99%

High voltage gain dual‐input dual‐output DC‐DC converter with reduced voltage stress on semiconductors

Jalilzadeh

Rostami

Babaei

et al. 2020

Circuit Theory & Apps

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This paper proposes a new nonisolated multiport DC-DC converter with two inputs and two outputs with different voltage levels. Different energy sources with distinct voltage-current characteristics can be utilized as the input sources. Regarding multiple outputs, the proposed converter can be utilized in electric vehicles (EVs) to supply the DC traction motor and the auxiliary loads. The main advantages of the proposed converter include the high voltage gainwith small values of the duty cycles, low normalized peak voltage stress (NPVS) across the semiconductors, and the continuous input currents. The voltage stress across the semiconductors is lower than the maximum output voltage. This feature makes it possible to use the switches with low turn-on resistance and the diodes with reduced rating voltage. Performance principals of the proposed converter along with the steady-state analysis, such as the derivation of the voltage gains, voltage and current stresses of the semiconductors, etc, are carried out. Experimental measurements made for the laboratory prototype of the proposed converter confirm the theoretical analysis. ;48:934-952.wileyonlinelibrary.com/journal/cta microelectronics, hybrid/electric vehicles, and lighting that includes electronic ballast and light-emitting diodes. 6 Regarding the abovementioned subjects, multi-input-multioutput (MIMO) DC-DC converters are employed in various applications. In Zhou et al, 7 a high step-up multiport DC-DC converter has been presented. Low voltage stress on the switches is the main feature of this structure. However, the voltage stress across the diode in one of the boost cells is equal to the output voltage. Furthermore, n inductors and n switches are needed for n-input single-output case, which causes the converter costs to be high. The converter in Deihimi et al 8 can provide higher voltage gains by increasing the number of inputs. However, the number of switches and inductors is increased, which in turn increases the cost and weight of the converter. The buck-boost and boost-based converter presented in Banaei et al 9 is capable of generating a high voltage gain. However, the output switch and diode experience high voltage stresses that limit its application. To have n-input in this converter, n inductors and n switches are required, which cause extra costs, big size, and high losses. A high step-up noncoupled inductor-based multiport DC-DC converter with reduced normalized peak voltage stress (NPVS) across the semiconductors has been presented in Varesi et al. 10 The modularity and continuous input currents are the other advantages of this converter. A two-phase high step-up DC-DC converter with reduced voltage stress across the switches and diodes has been presented in Hwu and Jiang. 11 The switched-capacitor-diode technique is applied to the conventional boost converter to increase the voltage gain in Hou et al. 12 A single-pole switch leg-based converter with three output ports and one bidirectional battery port has been presented by Kim and Kwak. 13 Saad...

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A new nonisolated soft switched DC‐DC bidirectional converter with high conversion ratio and low voltage stress on the switches

Vesali

Delshad

Adib

et al. 2020

Int Trans Electr Energ Syst

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Ultra‐step‐up dc–dc converter with low‐voltage stress on devices

Cited by 46 publications

References 29 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

High voltage gain dual‐input dual‐output DC‐DC converter with reduced voltage stress on semiconductors

A new nonisolated soft switched DC‐DC bidirectional converter with high conversion ratio and low voltage stress on the switches

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