Single phase universal input PFC converter operating at HF

Santiago-González, Juan A.; Otten, David; Lim, Seungbum; Afridi, Khurram K.

doi:10.1109/apec.2018.8341301

Cited by 10 publications

(5 citation statements)

References 19 publications

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“…An increase in η res will reduce the minimum input resistance. Equations (21), (29) and (30) are inserted into (8) in order to determine the inverter duty cycle:…”

Section: Full Convertermentioning

confidence: 99%

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Analysis and Design of a Resonant Power Converter With a Wide Input Voltage Range for AC/DC Applications

Spliid

Ammar

Knott

2020

IEEE J. Emerg. Sel. Topics Power Electron.

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Resonant converter topologies have the ability to eliminate switching losses through zero-voltage switching, making them well-suited for switching operation in the MHz frequency range. However, these types of converters are traditionally very sensitive to changes in input voltage and power level, making them unsuitable as power factor correcting AC-DC converters. This paper present a throughout analysis of the operation of a class DE converter in order to derive a set of conditions, under which it can achieve constant input impedance over a wide input voltage range (60-325 V DC) with constant output voltage (450 V DC) and thus be operated as a PFC converter, while maintaining zero voltage switching across the full range. The operation is experimentally verified under DC-DC operation for different power levels at a series of input voltages within the specified range. The implemented prototype achieves conversion efficiencies of up to 94 % and handles up to 105 W of power at switching frequencies of 2 MHz and above, while achieving constant input impedance over the full input voltage range, enabling its use as a power factor correcting converter.

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“…An increase in η res will reduce the minimum input resistance. Equations (21), (29) and (30) are inserted into (8) in order to determine the inverter duty cycle:…”

Section: Full Convertermentioning

confidence: 99%

“…Inserting (35) and (29) into (15) gives a simpler expression for the required load reactance seen from the inverter side.…”

Section: Full Convertermentioning

confidence: 99%

Analysis and Design of a Resonant Power Converter With a Wide Input Voltage Range for AC/DC Applications

Spliid

Ammar

Knott

2020

IEEE J. Emerg. Sel. Topics Power Electron.

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“…5. It is a two-input, single-output design that has been employed at the core of a high-powerdensity, high-frequency power factor correction converter [3]. Here we use the converter as a simple DAB converter.…”

Section: Experimental Verificationmentioning

confidence: 99%

“…5. DAB converter used for experimental verification of the model [3]. This converter has two primaries and a half bridge inverter on each primary.…”

Section: Experimental Verificationmentioning

confidence: 99%

“…1, the DAB consists of a transformer and two controllable FET bridges [1]. Typically, output regulation is obtained by controlling the phase shift between the inverter and rectifier bridges [1][2][3][4]. Under normal (high load) operation this converter can achieve zero voltage switching (ZVS); however, ZVS is only maintained when there is enough energy stored in the leakage inductance to charge and discharge the switch parasitic capacitance during dead time.…”

Section: Introductionmentioning

confidence: 99%

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Light Load Efficiency Improvements in Dual Active Bridge Converters via Dead time Control

Santiago-González

Otten

2018

2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL)

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Many converters suffer from poor efficiency at light loads even though much of their lifetime is spent at lightly loaded conditions. During normal operation, the dual active bridge (DAB) family of converters loses soft switching at low power levels, leading to poor light-load efficiency. In this paper a control approach for DAB converter is investigated that enhances their light-load efficiency via dead time control. A model is developed that captures the relationship between output power and dead time, and is used to formulate a control approach for light-load operation. Experimental results from a prototype converter validate the proposed approach.

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