Analysis and Design of a High Voltage Flyback Converter with Resonant Elements

Hong, Sung‐Soo; Ji, Sang-Keun; Jung, Young–Jin; Roh, Chung-Wook

doi:10.6113/jpe.2010.10.2.107

Cited by 21 publications

(5 citation statements)

References 8 publications

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“…The AC voltage gain is related to the switching frequency in (10). Therefore, the output voltage V o can be regulated by the variation of the switching frequency f s .…”

Section: Operation Principle and System Analysismentioning

confidence: 99%

“…Thus it is difficult to design optimal converters with wide load ranges. Power converters with a variable switching frequency and the ZVS technique such as resonant converters [10]- [15] have been proposed to achieve ZVS turn-on or zero current switching (ZCS) turn-off for active switches. In a conventional series resonant converter, the output voltage cannot be properly regulated under the no-load condition due to its limited voltage gain.…”

Section: Introductionmentioning

confidence: 99%

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Interleaved ZVS Resonant Converter with a Parallel-Series Connection

Lin¹,

Shen²

2012

Journal of Power Electronics

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This paper presents an interleaved resonant converter with a parallel-series transformer connection in order to achieve ripple current reduction at the output capacitor, zero voltage turn-on for the active switches, zero current turn-off for the rectifier diodes, less voltage stress on the rectifier diodes, and less current stress on the transformer primary windings. The primary windings of the two transformers are connected in parallel in order to share the input current and to reduce the root-mean-square (rms) current on the primary windings. The secondary windings of the two transformers are connected in series in order to ensure that the transformer primary currents are balanced. A full-wave diode rectifier is used at the output side to clamp the voltage stress of the rectifier diode at the output voltage. Two circuit modules are operated with the interleaved PWM scheme so that the input and output ripple currents are reduced. Based on the resonant behavior, all of the active switches are turned on under zero voltage switching (ZVS), and the rectifier diodes are turned off under zero current switching (ZCS) if the operating switching frequency is less than the series resonant frequency. Finally, experiments with a 1kW prototype are described to verify the effectiveness of the proposed converter.

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“…The AC voltage gain is related to the switching frequency in (10). Therefore, the output voltage V o can be regulated by the variation of the switching frequency f s .…”

Section: Operation Principle and System Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interleaved ZVS Resonant Converter with a Parallel-Series Connection

Lin¹,

Shen²

2012

Journal of Power Electronics

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“…(see (12)). Even though a passive snubber (RC or RCD) protects the MOSFET, it results in high power loss.…”

Section: Topologymentioning

confidence: 99%

“…1 is discussed. High voltage unidirectional flyback converter for a normal resistive load is analyzed in [12] without considering all parasitic elements in the flyback converter. The converter operation during the charge and the discharge modes including all parasitic elements is analyzed in detail in this paper.…”

Section: Converter Design and Analysismentioning

confidence: 99%

High voltage Bi-directional flyback converter for capacitive actuator

Thummala

Zhang

Andersen

2013

2013 15th European Conference on Power Electronics and Applications (EPE)

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Keywords«High voltage power converters», «Switched-mode power supply », «Energy efficiency», «Actuator», «Electroactive materials». AbstractThis paper presents a high voltage DC-DC converter topology for bi-directional energy transfer between a low voltage DC source and a high voltage capacitive load. The topology is a bi-directional flyback converter with variable switching frequency control during the charge mode, and constant switching frequency control during the discharge mode. The converter is capable of charging the capacitive load from 24 V DC source to 2.5 kV, and discharges it to 0 V. The flyback converter has been analyzed in detail during both charge and discharge modes, by considering all the parasitic elements in the converter, including the most dominating parameters of the high voltage transformer viz., self-capacitance and leakage inductance. The specific capacitive load for this converter is a dielectric electro active polymer (DEAP) actuator, which can be used as an effective replacement for conventional actuators in a number of applications. In this paper, the discharging energy efficiency definition is introduced. The proposed converter has been experimentally tested with the film capacitive load and the DEAP actuator, and the experimental results are shown together with the efficiency measurements.

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“…DC-DC [1]- [9] converters with zero voltage switching (ZVS), have been proposed with advantages such as high frequency operation, ZVS or zero current switching (ZCS) switching and high circuit efficiency. However, the voltage stresses or current stresses in the resonant converters are much to high for high input voltage or current applications.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Implementation of a DC-DC Converter with an Active Snubber

Lin¹,

Li²

2011

Journal of Power Electronics

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This paper presents a soft switching converter to achieve the functions of zero voltage switching (ZVS) turn-on for the power switches and dc voltage step-up. Two circuit modules are connected in parallel in order to achieve load current sharing and to reduce the size of the transformer core. An active snubber is connected between two transformers in order to absorb the energy stored in the leakage and magnetizing inductances and to limit the voltage stresses across the switches. During the commutation stage of the two complementary switches, the output capacitance of the two switches and the leakage inductance of the transformers are resonant. Thus, the power switches can be turned on under ZVS. No output filter inductor is used in the proposed converter and the voltage stresses of the output diodes is clamped to the output voltage. The circuit configuration, the operation principles and the design considerations are presented. Finally, laboratory experiments with a 340W prototype, verifying the effectiveness of the proposed converter, are described.

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Analysis and Design of a High Voltage Flyback Converter with Resonant Elements

Cited by 21 publications

References 8 publications

Interleaved ZVS Resonant Converter with a Parallel-Series Connection

Interleaved ZVS Resonant Converter with a Parallel-Series Connection

High voltage Bi-directional flyback converter for capacitive actuator

Analysis and Implementation of a DC-DC Converter with an Active Snubber

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