Isolated single stage bidirectional AC-DC converter with power decoupling and reactive power control to interface battery with the single phase grid

Rosas, Damián Sal y; Frey, David; Schanen, Jean‐Luc; Ferrieux, Jean-Paul

doi:10.1109/apec.2018.8341078

Cited by 17 publications

(1 citation statement)

References 12 publications

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“…Generally, a small-capacity film capacitor is used as and an energy storage element, and absorbing the power pulsation is achieved by controlling its voltage. So far, circuit topologies with the auxiliary circuit at single-phase AC power supply side (10) (11) , DC link section (12) , high-frequency link section (13) (14) , and DC output side (15)- (17) have been proposed. However, these schemes have a problem with the size of the auxiliary circuit for voltage control of the added small capacitor.…”

Section: Introductionmentioning

confidence: 99%

Operation Characteristics of Discontinuous Current Mode for a Dual-Active-Bridge AC-DC Converter with an Active Energy Buffer

Komeda

Takuma²,

Ohnuma³

et al. 2023

IEEJ Journal IA

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member This paper discusses operation characteristics of discontinuous current mode (DCM) for an ac-dc isolated converter for on-board battery chargers of electric vehicles. The converter discussed in this paper consists of a front-end diodebridge rectifier, an active energy buffer, and a dual-active-bridge dc-dc converter. The energy buffer circuit absorbs the power pulsation from the single-phase ac line into a small-rated capacitor, and thus, makes it possible to reduce a required capacitance of the dc-link capacitor. This paper explains details of the DCM control method including a technique of the ripple cancel of the inductor current, to realize the power factor correction of the line current and the voltage control of the buffer capacitor at the same time without complex calculations. Then, a reference value of the inductor current and an operation range of the dc-output voltage are discussed. Experimental results obtained by a 220-V, 6.6-kW experimental setup demonstrate a sinusoidal-line current and a controlled buffer capacitor voltage as well as a smoothed dc-output current.

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