An Isolated, bridgeless, quasi-resonant ZVS-switching, buck-boost single-stage AC-DC converter with power factor correction (PFC)

Scherbaum, Markus; Reddig, Manfred; Kennel, Ralph; Schlenk, Manfred

doi:10.1109/apec.2017.7930675

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…Different solutions based on a variety of single-stage systems without DC-link have been proposed: resonant LLC topology [17,18], boost full bridge converter [19], flyback [20,21], SEPIC (single-ended primary-inductor converter) [22], quasi-resonant bridgeless converter [23], matrix converter [24], and dual active bridge [25]. Furthermore, a range of hybrid topologies have been introduced for PFC applications, such as: SEPIC-flyback [26], boost-flyback [27,28], boost-forward [29,30], and forward-flyback [31].…”

Section: Introductionmentioning

confidence: 99%

Modular Battery Charger for Light Electric Vehicles

et al. 2020

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Rapid developments in energy storage and conversion technologies have led to the proliferation of low-and medium-power electric vehicles. Their regular operation typically requires an on-board battery charger that features small dimensions, high efficiency and power quality. This paper analyses an interleaved step-down single-ended primary-inductor converter (SEPIC) operating in the discontinuous conduction mode (DCM) for charging of battery-powered light electric vehicles such as an electric wheelchair. The required characteristics are achieved thanks to favourable arrangement of the inductors in the circuit: the input inductor is used for power factor correction (PFC) without additional elements, while the other inductor is used to provide galvanic isolation and required voltage conversion ratio. A modular interleaved structure of the converter helps to implement low-profile converter design with standard components, distribute the power losses and improve the performance. An optimal number of converter cells was estimated. The converter uses a simple control algorithm for constant current and constant voltage charging modes. To reduce the energy losses, synchronous rectification along with a common regenerative snubber circuit was implemented. The proposed charger concept was verified with a developed 230 VAC to 29.4 VDC experimental prototype that has proved its effectiveness.

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Section: Introductionmentioning

confidence: 99%

Modular Battery Charger for Light Electric Vehicles

et al. 2020

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“…1 Some PFC converters exceed this frequency range by achieving soft switching at the expense of additional lossy circuitry or by only partly achieving soft switching [5], [6]. Other approaches can achieve ZVS using complex switching networks [7], [8], stacked architectures [9], [10], or wide frequency ranges [11]- [13]. See [4] for further discussion.…”

Section: Introductionmentioning

confidence: 99%

A high frequency power factor correction converter with soft switching

Hanson

Perreault

2018

2018 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Power factor correction (PFC) converters are typically operated at low frequency to mitigate switching losses and to simplify control; this in turn requires large passive components. Soft switching techniques could permit higher frequency operation, but most soft-switched converters do not maintain high performance across the wide voltage and power ranges required for PFC applications. Here we present a PFC converter which enables high frequency operation by maintaining soft switching and by using a control scheme which requires no current sensing. These advantages are verified with a prototype which achieves power factors above 0.996 (THD < 10 %) while maintaining ZVS across voltage and power for efficiencies ∼ 97 %. By using increased switching frequency (∼ 10x over conventional designs), this converter can take advantage of greatly reduced passive component values for power conversion and EMI filtering.

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