Forward converter regulator using PWM controlled transformer

Sun, Ning; Chen, D.Y.; Lee, F.C.; Gradzki, P.M.; Knights, Mikell

doi:10.1109/pesc.1993.472058

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…Switching mode power supplies with hard switching techniques have been used in the modern industry products. The hard switching techniques of DC–DC converters result in low efficiency and high voltage and current stresses on power semiconductors owing to the transformer leakage inductance. In the past, the passive resistor‐capacitor‐diode (RCD) snubber was used to reduce the voltage stress on semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Implementation of parallel zero‐voltage switching converter with series‐connected transformers

Lin

Cheng

2011

Circuit Theory & Apps

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SUMMARYThis paper presents a parallel zero-voltage switching (ZVS) DC-DC converter with series-connected transformers. In order to increase output power, two transformers connected in series are used in the proposed converter. Two buck-type converters connected in parallel have the same switching devices. The primary windings of series-connected transformers can achieve the balanced secondary winding currents. The current doubler rectifiers with ripple current cancellation are connected in parallel at the output side to reduce the current stress of the secondary winding. Thus, the current ripple on the output capacitor is reduced, and the size of the output choke and output capacitor are reduced. Only two switches are used in the proposed circuit instead of four switches in the conventional parallel ZVS converter to achieve ZVS and output current sharing. Therefore, the proposed converter has less power switches. The ZVS turn-on is implemented during the commutation stage of two complementary switches such that the switching losses and thermal stresses on the semiconductors are reduced. Experimental results for a 528-W (48 V/11 A) prototype are presented to prove the theoretical analysis and circuit performance.

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Section: Introductionmentioning

confidence: 99%

Implementation of parallel zero‐voltage switching converter with series‐connected transformers

Lin

Cheng

2011

Circuit Theory & Apps

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“…The hard switching techniques of dc-dc converters [1][2] result in low efficiency and high voltage and current stresses on power semiconductors owing to the transformer leakage inductance. In the past, the passive RCD snubber was used to reduce the voltage stress on semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Parallel ZVS converter with series connected transformers

Lin

Chiang

Chen

et al. 2010

TENCON 2010 - 2010 IEEE Region 10 Conference

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This paper presents a parallel zero voltage switching (ZVS) dc-dc converter with series connected transformers. In order to increase output power, two transformers connected in series are used in the proposed converter. Two buck-type converters connected in parallel have the same switching devices. The primary windings of series connected transformers can achieve the balanced secondary winding currents. The current doubler rectifiers with ripple current cancellation are connected in parallel at the output side to reduce the current stress of the secondary winding. Thus the current ripple on the output capacitor is reduced and the size of output choke and output capacitor are reduced. Only two switches are used in the proposed circuit instead of four switches in the conventional parallel ZVS converter to achieve zero voltage switching and output current sharing. Therefore, the proposed converter has less power switches. The ZVS turn-on is implemented during the commutation stage of two complementary switches such that the switching losses and thermal stresses on the semiconductors are reduced. Experimental results for a 528W (48V/11A) prototype are presented to prove the theoretical analysis and circuit performance.

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Implementation of a parallel zero-voltage switching forward converter with less power switches

Lin

Shih

2011

IET Pwr. Electr.

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Forward converter regulator using PWM controlled transformer

Cited by 5 publications

References 3 publications

Implementation of parallel zero‐voltage switching converter with series‐connected transformers

Implementation of parallel zero‐voltage switching converter with series‐connected transformers

Parallel ZVS converter with series connected transformers

Implementation of a parallel zero-voltage switching forward converter with less power switches

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