A Two-stage Universal Input Charger with Wide Output Voltage Range

Ranjram, Mike K.; Zeng, Cheng; Perreault, David J.

doi:10.1109/ecce.2019.8913317

Cited by 4 publications

(2 citation statements)

References 16 publications

(14 reference statements)

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“…Nevertheless, instead of paralleling secondary winding outputs as the parallel mode in ref. [31], the proposed approach applies different number of windings at two secondary sides (N sA , N sB ), where their turn ratios with respect to the primary side (N p ) are n A and n B respectively, as Equation (7). Without paralleling two secondary winding outputs, the proposed converter can further reduce the number of the component count.…”

Section: Dc-dc Converter-modified Re-configurable Half-bridgementioning

confidence: 99%

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A new modulation strategy on isolated battery charger with wide input and output voltage range

Jou

Chen

Wu³

et al. 2023

IET Power Electronics

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A new wide voltage operation range isolated battery charger, which is composed of an asymmetric T‐type AC–DC power rectifier and a modified re‐configurable half bridge DC–DC power converter, is proposed in this paper. The asymmetric T‐type rectifier adopts different modulation strategies under different AC bus voltage amplitudes and different battery voltages for increasing power conversion efficiency. As the isolated DC–DC power stage, a modified re‐configurable half bridge converter applies a three‐winding transformer to achieve a wide output operation range. The proposed battery charger operates over a wide AC input voltage range and wide DC output voltage range. A 3.2 kW hardware battery charger prototype is built to adapt AC voltage between 85 and 265 V. Both constant current and constant voltage modes are implemented experimentally to charge the battery up to 6.5 A from 50 to 500 V. The experimental results prove that the proposed asymmetric T‐type rectifier adopts different modulation strategies under different AC bus voltage amplitudes and different battery voltages can increase the power conversion efficiency, the proposed DC–DC converter can output the DC voltage from 50 to 500 V and the proposed battery charger can achieve around 94% efficiency.

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Section: Dc-dc Converter-modified Re-configurable Half-bridgementioning

confidence: 99%

“…With EVs, there are more chargers in garages. Therefore, the universal input chargers with a wide output voltage range draw attention in EV chargers [7,8].…”

Section: Introductionmentioning

confidence: 99%