A new current-fed high step-up quasi-resonant DC-DC converter with voltage quadrupler

Dobakhshari, Sina Salehi; Fathi, S. H.; Banaiemoqadam, Amin; Moghani, Javad Shokrollahi

doi:10.1109/pedstc.2016.7556861

Cited by 4 publications

(5 citation statements)

References 17 publications

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“…With the addition of capacitors at the input, combined with the interleaved structure, the source can achieve zero ripple. Figure 13 shows the active switch voltage when the output voltage is 380 volts, the duty cycle is 0.4, and the load is 320 W. It can be seen that the voltage stress on the switch is 60 volts which is much less than the one in [12] and [15] which would be 120 volts for the same output voltage level. Figure 12a shows the current waveform of the main transformer Ilk1 which is probed by a current probe that conforms to the analysis presented in chapter two.…”

Section: Resultsmentioning

confidence: 99%

“…With the addition of capacitors at the input, combined with the interleaved structure, the source can achieve zero ripple. Figure 13 shows the active switch voltage when the output voltage is 380 volts, the duty cycle is 0.4, and the load is 320 W. It can be seen that the voltage stress on the switch is 60 volts which is much less than the one in [12] and [15] which would be 120 volts for the same output voltage level. Figure 13 shows the active switch voltage when the output voltage is 380 volts, the duty cycle is 0.4, and the load is 320 W. It can be seen that the voltage stress on the switch is 60 volts which is much less than the one in [12,15] which would be 120 volts for the same output voltage level.…”

Section: Resultsmentioning

confidence: 99%

“…The prototype from [14], for example, drops in efficiency from 93 to 90% at half load. In addition, prototype from [15] has a peak efficiency of 96% that drops to 89% at half load. It can be seen that the waveforms conform to the analysis and it can be seen how Diode 1 collects all the leakages.…”

Section: Resultsmentioning

confidence: 99%

“…In the case where galvanic isolation is required, high frequency isolated DC-DC converters become the viable choice. Current fed, isolated DC-DC converters are the favorite in this category due to their boosting capability and their low ripple input current; additionally, they utilize high-frequency transformers with a relatively simple structure [14][15][16]. In these topologies, the duty cycle is usually more than 0.5.…”

Section: Introductionmentioning

confidence: 99%

“…In these topologies, the duty cycle is usually more than 0.5. In [14][15][16], boosting was achieved through a transformer with a turn's ratio, and ZVS operation of the main switches was realized but the transformer's turns ratio needed to be high for sufficient voltage gain. In addition, the high turn's ratio will reflect on the voltage stress of the secondary side switches and diodes.…”

Section: Introductionmentioning

confidence: 99%

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An Isolated High Voltage Boost Current-Fed DC–DC Converter Based on 1:1 Transformer Multiplier Cells and ZVS Operation

2020

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This paper presents a high step up, current fed, interleaved, isolated DC-DC converter with voltage multipliers and ZVS (zero voltage switching). The converter provides zero voltage switching for all active switches and provides a high step up voltage gain that is suitable for very low voltage source applications, such as PV and other renewable sources. In addition, this converter allows the utilization of very low voltage stress switches and diodes. It reduces the current stress by interleaving the input current, and reduces the voltage stress by utilizing a half bridge based multiplier cell integrated configuration at the output voltage while providing high frequency galvanic isolation. The isolation is achieved through the use of 1:1 transformers which are easier to design, and the need for a high turns ratio is absent in this converter. The main theory of operation and the design guideline are presented, as is a laboratory prototype, all to validate the concept.Abstract: This paper presents a high step up, current fed, interleaved, isolated DC-DC converter with voltage multipliers and ZVS (zero voltage switching). The converter provides zero voltage switching for all active switches and provides a high step up voltage gain that is suitable for very low voltage source applications, such as PV and other renewable sources. In addition, this converter allows the utilization of very low voltage stress switches and diodes. It reduces the current stress by interleaving the input current, and reduces the voltage stress by utilizing a half bridge based multiplier cell integrated configuration at the output voltage while providing high frequency galvanic isolation. The isolation is achieved through the use of 1:1 transformers which are easier to design, and the need for a high turns ratio is absent in this converter. The main theory of operation and the design guideline are presented, as is a laboratory prototype, all to validate the concept.

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Section: Resultsmentioning

confidence: 99%

“…With the addition of capacitors at the input, combined with the interleaved structure, the source can achieve zero ripple. Figure 13 shows the active switch voltage when the output voltage is 380 volts, the duty cycle is 0.4, and the load is 320 W. It can be seen that the voltage stress on the switch is 60 volts which is much less than the one in [12] and [15] which would be 120 volts for the same output voltage level. Figure 13 shows the active switch voltage when the output voltage is 380 volts, the duty cycle is 0.4, and the load is 320 W. It can be seen that the voltage stress on the switch is 60 volts which is much less than the one in [12,15] which would be 120 volts for the same output voltage level.…”

Section: Resultsmentioning

confidence: 99%