A Full Soft-Switching ZVZCS Flyback Converter Using an Active Auxiliary Cell

Tarzamni, Hadi; Babaei, Ebrahim; Gharehkoushan, Amirreza Zarrin

doi:10.1109/tie.2016.2615601

Cited by 41 publications

(18 citation statements)

References 16 publications

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“…Based on (6), (8), and (9), the capacitors' voltages for the parameters in Table 4 are calculated as V Ca = V Cb = DV i /(1 − D) = 60 V, V C1 = 460 V, and V Cf1 = V C2 = 500 V, which can be verified by experimental results in Figure 7A to 7C. According to (10), output voltage for the parameters in Table 4 is obtained as V o = GV i = 24V i = 960 V which is almost equal to obtained experimental result in Figure 7D.…”

Section: Resultsmentioning

confidence: 59%

“…Even though by adding the secondary winding of these converters the voltage gain of the converter increases, several drawbacks such as leakage inductances which causes the resonances, voltage spikes, and consequently the related losses and high input current ripples may occur. 8 In recent years, numbers of dc-dc converters with coupled inductor in their topology are proposed which have suppressed the voltage spikes through active clamping circuits 9 and soft switching techniques in Tarzamni et al 10 Also, they have restricted the input current ripple. 11 Transformerless DC-DC boost converters are applied in power systems recently to avoid the disadvantages of the converters with transformer or coupled inductor in their power circuits.…”

Section: Introductionmentioning

confidence: 99%

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A new switched‐capacitor/switched‐inductor–based converter with high voltage gain and low voltage stress on switches

Heris

Saadatizadeh

Sabahi

et al. 2019

Circuit Theory & Apps

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Summary In this paper, a nonisolated transformerless switched‐capacitor/switched‐inductor–based dc‐dc converter with high voltage gain is proposed. The proposed converter has low voltage stress on switches and diodes which leads to decrease the switching losses. The voltage gain of the proposed converter can be increased by adding more diode‐capacitor modules at output side; therefore, the proposed converter has expandable structure. The proposed converter has higher voltage gain and lower voltage stress on switches comparing with the other similar switched‐capacitor–based converters. The proposed converter uses two switches with the same switching pattern. Therefore, its switching pattern is not complicated. In this paper, the proposed converter is analyzed during a switching period which has two operating modes. Moreover, the average current through the switches, diodes, and inductors; voltage stress on switches and diodes; voltage gain; maximum and minimum current of switches and diodes; and the efficiency curve are calculated. Finally, in order to verify the accuracy performance of the proposed converter, a 530‐W 40 to 920‐V prototype is implemented practically.

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Section: Resultsmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

A new switched‐capacitor/switched‐inductor–based converter with high voltage gain and low voltage stress on switches

Heris

Saadatizadeh

Sabahi

et al. 2019

Circuit Theory & Apps

Self Cite

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show abstract

“…4. The values of the converter elements are tabulated in Table 2 using (10)- (18). IRF740 is utilised for the switches, MUR460 is used for the snubber and clamp diodes and the secondary diodes are MUR860.…”

Section: Resultsmentioning

confidence: 99%

Half‐bridge flyback converter with lossless passive snubber and interleaved technique

Mohammadian

Yazdani

2018

IET Power Electronics

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Hard-switching flyback converters are widely used in the low power application but suffer from high electromagnetic emissions, current ripples, and low efficiency. To overcome these problems, a half-bridge flyback converter with a new lossless passive snubber is proposed using an interleaved structure. All switches of the proposed converter turn on under zero current switching and turn off under zero voltage switching which decreases the switching losses and electromagnetic interference (EMI). Theoretical analysis of the proposed converter is presented and verified by the experimental results of a 200 W prototype. In addition to the 7% efficiency improvement, the proposed converter has lower EMI in comparison with its hardswitching converter.

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“…In order to overcome these constrains, a fully soft switched fly-back converter is presented in Tarzamni et al 17 to minimize the switching losses. In spite of achieving high voltage gains, the voltage stresses on switches of fly-back converters are noteworthy; also, the leakage inductances and unexpected input current ripple would be high.…”

Section: Introductionmentioning

confidence: 99%

“…In spite of achieving high voltage gains, the voltage stresses on switches of fly-back converters are noteworthy; also, the leakage inductances and unexpected input current ripple would be high. In order to overcome these constrains, a fully soft switched fly-back converter is presented in Tarzamni et al 17 to minimize the switching losses. In addition, a fly-back converter with active-clamp capability is introduced in Perrin et al 18 to recycle the energy stored in the leakage inductance of the transformer.…”

Section: Introductionmentioning

confidence: 99%

Expandable interleaved high voltage gain boost DC‐DC converter with low switching stress

Saadatizadeh

Heris

Babaei

et al. 2019

Circuit Theory & Apps

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In this paper, an interleaved DC-DC step-up boost converter with high voltage conversion ratio and low voltage stresses on switches and diodes is proposed.The proposed converter has low average current passing through the diodes and switches and low input current ripple as a feature of interleaved converters. The voltage gain of the proposed converter can be increased by adding more diode-capacitor modules; therefore, the proposed converter has expandable structure. In addition, by implementing more diode-capacitor modules, the switching stresses would be more decreased. Also, to evaluate the performance of the proposed converter, it is compared with other similar presented circuits in the literature. The proposed converter is not only able to provide higher voltage gain but also has lower voltage stresses on switches and diodes.Consequently, switches and diodes with low voltage ratings can be selected.Theoretical analysis is provided in this study for each operation mode and the average current through the switches, diodes and inductors, voltage stresses on switches and diodes, voltage gain, and input current ripple are calculated. Finally, to demonstrate the accuracy performance of the proposed converter, a 450-W prototype is implemented practically.KEYWORDS diode-capacitor, high voltage gain, interleaved DC-DC converter, low input current ripple, low voltage stresses on switches

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A Full Soft-Switching ZVZCS Flyback Converter Using an Active Auxiliary Cell

Cited by 41 publications

References 16 publications

A new switched‐capacitor/switched‐inductor–based converter with high voltage gain and low voltage stress on switches

A new switched‐capacitor/switched‐inductor–based converter with high voltage gain and low voltage stress on switches

Half‐bridge flyback converter with lossless passive snubber and interleaved technique

Expandable interleaved high voltage gain boost DC‐DC converter with low switching stress

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