An Isolated Soft-Switched High-Power-Factor Rectifier Based on the Asymmetrical Half-Bridge Flyback Converter

Spiazzi, G.; Buso, Simone

doi:10.1109/tie.2021.3100975

Cited by 16 publications

(5 citation statements)

References 32 publications

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“…For the calculation of D g , the estimated v s and v bus help to shape the envelope of the input current while k iv controls the magnitude of the input current. The constant V o within a line period is achieved by actively estimating the instantaneous v bus using the processed sample signals V bus.avg , V sp , and t. According to v bus , V bus.avg , D g , and k out , the appropriate D h to output constant V o could be calculated using (37) or (38). For the calculation of D h , the estimated v bus , processed sampled V bus.avg , and previously calculated D g help to eliminate the double-line ripple of the output voltage while k out controls the output voltage level.…”

Section: Control Strategy Of the Single-stage Topologymentioning

confidence: 99%

Asymmetric modulation of bridgeless single‐stage full‐bridge AC–DC converter for active power factor correction and zero voltage switching

Liu

Loo

Wang

et al. 2023

IET Power Electronics

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Singe‐phase single‐stage AC–DC converters exhibit the advantages of lower cost, higher efficiency, and lower power semiconductor device count compared with traditional two‐stage topologies. However, most existing single‐stage AC–DC topologies encounter some or all the following drawbacks: hard‐switching operation, bulky bus or output capacitor, uncontrolled bus voltage, not actively shaped input current, a large amount of power semiconductor devices, etc. The bridgeless single‐stage full‐bridge AC–DC converter can be considered a promising solution for high power capacity and efficiency. However, this topology still suffers from most of the drawbacks. In this paper, a new asymmetric modulation method of bridgeless single‐stage full‐bridge AC–DC converter is proposed to achieve active power factor (PF) correction and zero‐voltage switching. Topology description, the proposed modulation and control methods, theoretical analysis progress, and reference design procedure are presented in detail. Finally, a 2‐kW laboratory prototype is implemented with experimental results presented to validate the principle and design.

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Section: Control Strategy Of the Single-stage Topologymentioning

confidence: 99%

Asymmetric modulation of bridgeless single‐stage full‐bridge AC–DC converter for active power factor correction and zero voltage switching

Liu

Loo

Wang

et al. 2023

IET Power Electronics

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“…A comprehensive study in transient, steady-state, and switching dynamics is presented. [33] focuses on the analysis and design of a softswitched clamped-resonant interleaved boost converter. It could be valuable for those interested in soft-switching techniques and resonant converters.…”

Section: A Significance Of Boost Convertersmentioning

confidence: 99%

Nonlinear Cascaded Control for a DC-DC Boost Converter

Mansouri,

Gavagsaz-Ghoachani,

Phattanasak

et al. 2023

Journal of Robotics and Control

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The Boost Converter is a type of DC-DC converter that operates using switching techniques and is designed to elevate the voltage level. This paper presents a cascaded control for a boost converter to ensure that the inductor current and output capacitor voltage remain in a safe operating zone. Ensuring safe operating conditions and stable closed-loop poles is crucial because it guarantees that both current and voltage remain within the designated operating range. This preventive measure prevents any damage to components like capacitors (C), inductors (L), and switches. Unstable operation, on the other hand, could lead to oscillations and an undesirable increase in the amplitude of current and voltage, posing a risk to all components involved. The research contribution involves an investigation of cascaded control, utilizing power and energy concepts due to their advantageous effects on system performance and design. By implementing nonlinear controllers based on a large-signal averaged model, the closed-loop poles remain independent of operating points, eliminating the need for small-signal linearization. Small-signal linearization makes the controlled system dependent on the operating point. Two controllers are introduced based on power and energy concept, which is easy to understand. The potential practical application of the proposed cascaded control approach is in high-power applications. Tracking the energy stored in the output capacitor is first investigated to validate the proposed control scheme by varying the output voltage reference from 32 V to 50 V. Then, the regulation of the energy voltage is explored by varying the load resistance for the output voltage at 50 V. Both are done using a switched model using MATLAB/Simulink software. Simulation results are given to demonstrate the effectiveness of the proposed method. The key metrics used to assess the effectiveness of the proposed control scheme are the undershoot voltage and robustness. The results show that the studied system's tracking, regulating operations and robustness properties are as expected. The proposed method faces a challenge with the number of sensors required. To address this, observers can be utilized to reduce sensor usage while maintaining measurement accuracy. The proposed method can be applied to other power electronic systems.

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“…Requirements are high efficiency, reliability and power factor on one side and low weight and cost on the other side [4 -9]. In the references could be found many rectifying topologies [10,11]. One of the recent proposed topologies has low switch number, and power factor correction [12,13].…”

Section: Introductionmentioning

confidence: 99%

Topology of Galvanic Isolated Battery Charging Unit With Power Factor Correction

Rakanov

2024

JCTM

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The present study investigates topology for battery charging units (BCU) with simple design and power factor correction. It has a galvanic isolation between the grid and the battery, which is one of the law and standard requirements. The impulse transformer ensures galvanic isolation, which makes the topology suitable for onboard electric vehicles (EV) charging units (OBC). The study also presents a simulation model a simulation model with the help of which a simulation is conducted and a result is obtained.

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An Isolated Soft-Switched High-Power-Factor Rectifier Based on the Asymmetrical Half-Bridge Flyback Converter

Cited by 16 publications

References 32 publications

Asymmetric modulation of bridgeless single‐stage full‐bridge AC–DC converter for active power factor correction and zero voltage switching

Asymmetric modulation of bridgeless single‐stage full‐bridge AC–DC converter for active power factor correction and zero voltage switching

Nonlinear Cascaded Control for a DC-DC Boost Converter

Topology of Galvanic Isolated Battery Charging Unit With Power Factor Correction

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