DCM forward-flyback converter integrated with a 5-order cockcroft-walton voltage multiplier: A steady-state and resonant current analysis

Dall’Asta, Matheus Schramm; Fuerback, Vinicius Bernardi; Lazzarin, Telles Brunelli

doi:10.1109/cobep.2017.8257407

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…A general analysis of the DCM FF-CWVM topology is performed in [4], where the theoretical voltage gain (1) is obtained, considering the ideal circuit. The DCM condition (2) is met due to the very light load specifications and the high turn ratio of the transformer.…”

Section: B Voltage Gain Analysis In Dcmmentioning

confidence: 99%

“…In order to properly understand the behavior of the FF-CWVM under very light load and very high voltage gain conditions, the influence of the parasitic capacitances must be taken into account since the waveforms, the voltage gain and the performance of the circuit are significantly affected by them. Compared to the ideal analysis reviewed in [4], new operation stages (Figure 2) must be considered. Also, the most representative waveforms are shown in Figure 3.…”

Section: Operation Stagesmentioning

confidence: 99%

“…Figure 4(a) shows the equivalent resonant circuit during 'St1'. As explained in [4], the resonant capacitance ( ′) depends on the secondary side capacitors and it is estimated based on the behavior of the CWVM. The resonance occurs between ′ and the leakage inductance ( ) because the winding capacitance of the transformer ( ) is negligible compared to ′ .…”

Section: Operation Stagesmentioning

confidence: 99%

“…2(d)) from t to t : the 'Flyback' diodes (subscripted with even numbers) are polarized and the remaining magnetizing energy is delivered to the voltage multiplier, charging the capacitors. The operation along this stage is also explained in [4] and corresponds to a conventional Flyback converter.…”

Section: Operation Stagesmentioning

confidence: 99%

“…The design of the power supply is critical for the behavior of the EHD cooling system. Several topologies have been analyzed in combination with the Cockcroft-Walton Voltage Multiplier (CWVM): the non-resonant Half-Bridge [2], the Boost [3] and the Flyback [4,5]. Additionally, the resonant Half-Bridge topology, without CWVM, has also been considered.…”

Section: Introductionmentioning

confidence: 99%

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DCM Forward-Flyback converter with Cockcroft-Walton Voltage Multiplier: steady-state analysis considering the influence of the parasitic capacitances at very low power and very high voltage gain

Serrano

Alou

Oliver

2019

2019 IEEE Energy Conversion Congress and Exposition (ECCE)

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Electrohydrodynamic (EHD) cooling systems are becoming a feasible solution to replace rotary fans from electronic products, leading to more robust solutions with lower weight. High voltage power supplies are an essential part of the system. In general, EHD loads require very low current to produce the corona discharge and the air flow [1]. The Forward-Flyback converter with Cockcroft-Walton Voltage Multiplier (FF-CWVM) is presented in this paper as a suitable candidate to supply an EHD load. Under very low power (1.5W) and high voltage gain (1:250) conditions, the FF-CWVM is very sensitive to the influence of the parasitic capacitances, leading to new operation stages. Then, the steady-state operation of the converter is analyzed and the most representative equivalent circuits and waveforms are presented. Finally, the theoretical analysis is validated with simulation and experimental results and the importance of achieving ZVS is highlighted.

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Section: B Voltage Gain Analysis In Dcmmentioning

confidence: 99%

Section: Operation Stagesmentioning

confidence: 99%

Section: Operation Stagesmentioning

confidence: 99%

Section: Operation Stagesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

DCM Forward-Flyback converter with Cockcroft-Walton Voltage Multiplier: steady-state analysis considering the influence of the parasitic capacitances at very low power and very high voltage gain

Serrano

Alou

Oliver

2019

2019 IEEE Energy Conversion Congress and Exposition (ECCE)

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High-performance, miniaturized and configurable power and control unit for electrospray thrusters

Blázquez-Plaza,

Barrado,

Wijnen

2024

CEAS Space J

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Electrospray thrusters offer remarkable efficiency at low power levels and compact form factor, positioning them as promising propulsion systems for small satellite platforms. This paper introduces the design of a miniaturized Power and Control Unit for electrospray thrusters. The system fits within the pocketsat form factor while ensuring high-performance, high-voltage power conversion and effective thrust generation in this propulsion technology. The paper goes through the architecture of the Power and Control Unit and its different subsystems, where the high-performance power converter is studied in detail. The system is built in a 42 $$\times$$ × 42 $$\times$$ × 25 mm3 and 39 g weight stacked hardware unit, achieving a configurable bipolar voltage output with the implemented control algorithm. The system undergoes experimental verification, where a power conversion efficiency over 90% was measured within the output range of 2-10W and 1-2kV, validating soft-start, thruster voltage alternation, and variation of the thruster set point in real time. The final milestone is the successful 7-hour emission test with electrospray thrusters under vacuum conditions, ensuring the system’s suitability for real-world applications related to electrospray propulsion for small satellites.

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Sunlight-powered sustained flight of an ultralight micro aerial vehicle

Shen,

Peng,

et al. 2024

Nature

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DCM forward-flyback converter integrated with a 5-order cockcroft-walton voltage multiplier: A steady-state and resonant current analysis

Cited by 7 publications

References 17 publications

DCM Forward-Flyback converter with Cockcroft-Walton Voltage Multiplier: steady-state analysis considering the influence of the parasitic capacitances at very low power and very high voltage gain

DCM Forward-Flyback converter with Cockcroft-Walton Voltage Multiplier: steady-state analysis considering the influence of the parasitic capacitances at very low power and very high voltage gain

High-performance, miniaturized and configurable power and control unit for electrospray thrusters

Sunlight-powered sustained flight of an ultralight micro aerial vehicle

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