An improved family of ZVS-PWM active-clamping DC-to-DC converters

Duarte, Candido; Barbi, I.

doi:10.1109/63.988661

Cited by 106 publications

(34 citation statements)

References 11 publications

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“…This energy loss reduces the efficiency of the converter. In order to avoid this problem, active clamping techniques have already been presented for single-phase converters and successfully reused the energy that would be dissipated both in non-isolated [14] and isolated topologies [15]. To sum up, soft-commutation (ZVS) was also achieved with a correct parametric combination.…”

Section: Introductionmentioning

confidence: 99%

A ZVS-PWM Three-Phase Current-Fed Push–Pull DC–DC Converter

Andersen

Barbi

2013

IEEE Trans. Ind. Electron.

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In this paper, a ZVS-PWM three-phase currentfed push-pull DC-DC converter is proposed. When compared to single-phase topologies, the three-phase DC-DC conversion increases the power density, uses the magnetic core of the transformer more efficiently, reduces the stress on switches and requires smaller filters since the frequency for its design is higher. The proposed converter employs an active clamping technique by connecting the primary side of the transformer to a three-phase full bridge of switches and a clamping capacitor. This circuit allows the energy from the leakage inductances to be reused, increasing the efficiency of the converter. If appropriate parameters are chosen, soft-commutation of the switches (ZVS) can also be achieved. The soft-commutation improves the efficiency even further, allows higher switching frequencies to be used and reduces the electromagnetic interference (EMI) significantly. Applications such as fuel cell systems, transportation and uninterruptable power supplies are some examples that can benefit from the advantages presented by this converter. The theoretical analysis, a design example and experimental results for a prototype implementing this topology are presented. The prototype was designed to process 4 kW at full load with an input voltage of 120 V, an output voltage of 400 V and a switching frequency of 40 kHz.

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Section: Introductionmentioning

confidence: 99%

A ZVS-PWM Three-Phase Current-Fed Push–Pull DC–DC Converter

Andersen

Barbi

2013

IEEE Trans. Ind. Electron.

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“…So far, a number of soft-switched boost converters and their variations have been proposed [2]- [10]. All of them use additional components to form an active snubber [2]- [7], or a passive lossless snubber [8]- [10] circuit that controls the turn-off di/dt rate of the boost rectifier. Generally, the active-snubber approaches employ an auxiliary active switch with a few passive components such as inductors, capacitors, and rectifiers, whereas the passive-snubber approaches use only passive components.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The main feature of the active approaches introduced in [2]- [7] is that besides soft switching of the boost rectifier they also offer the zero-voltage switching (ZVS) of the boost switch. In addition, the approaches described in [4]- [7] offer soft switching of the auxiliary switch. Specifically, in the active-snubber implementation in [4], the snubber switch turns off with zero-current switching (ZCS), whereas in the implementations in [5]- [7], it turns on with ZVS.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the approaches described in [4]- [7] offer soft switching of the auxiliary switch. Specifically, in the active-snubber implementation in [4], the snubber switch turns off with zero-current switching (ZCS), whereas in the implementations in [5]- [7], it turns on with ZVS. In addition, all these active approaches exhibit voltage and current stresses on the semiconductor components which are similar to those in the boost circuit without a snubber.…”

Section: Introductionmentioning

confidence: 99%

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A novel active snubber for high-power boost converters

Jovanovic

Jang

2000

IEEE Trans. Power Electron.

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A technique which improves the performance of the boost converter by reducing the reverse-recovery-related losses in the boost switch and rectifier with an active snubber that is implemented with a minimum number of components is presented. This minimum-component-count snubber consists of a snubber inductor, an auxiliary switch, and a rectifier. The proposed technique reduces the reverse-recovery-related losses by controlling the turn-off di/dt rate of the rectifier current with the snubber inductor connected in series with the boost switch and rectifier. The voltage and current stresses of the components in the proposed active-snubber boost converter are similar to those in its conventional "hard-switched" counterpart.

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