A single phase AC-DC bidirectional converter with integrated ripple steering

Malan, W. L.; Vilthgamuwa, D. Mahinda; Walker, Geoffrey R.; Broadmeadow, Mark A. H.; Thrimawithana, Duleepa J.; Madawala, Udaya K.

doi:10.1109/ipemc.2016.7512651

Cited by 9 publications

(5 citation statements)

References 21 publications

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“…By utilizing the equivalent circuit shown in Fig. 3, the peakto-peak change of each inductor current (i L1 and i L2 ) in a switching period is given by (22).…”

Section: Parameter Design For Ripple Steering Circuitmentioning

confidence: 99%

“…In (16), if P m , V dc and ω r are predetermined, C r can be calculated by substituting (22) into (21). Fig.…”

Section: Parameter Design For Ripple Steering Circuitmentioning

confidence: 99%

“…Two similar integrated ripple power decoupling approaches are proposed in [22] and [23] where multiplexed utilization of existing switches in the DC side full bridge of DC/AC DAB converter and an electrolytic capacitor as a ripple power buffer are employed for good effect. In this paper, a novel ripple current reduction method is developed by adopting an integrated ripple power reduction circuit with two small ripple steering inductors and a capacitor and with no additional switches.…”

mentioning

confidence: 99%

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An Active Power Decoupling Method for Single Phase DC/AC DAB Converters

et al. 2019

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The existence of the double grid frequency (100 Hz) ripple current in dc/ac dual active bridge (DAB) power converters can degrade their performance and as such these ripples need to be compensated. An active power decoupling method is proposed in this paper to attenuate the 100-Hz current ripple in single phase dc/ac DAB converters. Compared to other current ripple reduction methods for which additional switches are used, the proposed method does not require any additional switching components thus decreasing the system cost. In the proposed method, the existing switching devices of the primary side full bridge converter and an LLC circuit integrated to form a 100-Hz ripple current reduction circuit, which is controlled by regulating the duty cycle of the primary full bridge converter switching legs. The mathematical analysis and the circuit parameter design methods are proposed. In addition, a current sharing method is proposed to keep the currents of the inductors in the LLC circuit are balanced against any possible circuit parameter deviations. The effectiveness of the developed method is evaluated through the simulation and experimental tests.

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“…By utilizing the equivalent circuit shown in Fig. 3, the peakto-peak change of each inductor current (i L1 and i L2 ) in a switching period is given by (22).…”

Section: Parameter Design For Ripple Steering Circuitmentioning

confidence: 99%

“…In (16), if P m , V dc and ω r are predetermined, C r can be calculated by substituting (22) into (21). Fig.…”

Section: Parameter Design For Ripple Steering Circuitmentioning

confidence: 99%

mentioning

confidence: 99%

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An Active Power Decoupling Method for Single Phase DC/AC DAB Converters

et al. 2019

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“…As u s can be controlled by the duty cycle of the leg A, the ripple power is supposed to be completely eliminated by adjusting the duty cycle properly. The relation between the power decoupling capacitor C s and the duty cycle deviation d is given in [18] as…”

Section: Control Strategymentioning

confidence: 99%

“…By adjusting the duty cycles of the legs, bidirectional power flow is realized for the two ports at the primary side of the HF transformer. Similar with the asymmetric topology presented in [16], an active power decoupling method is introduced for CLLC-type resonant DC-AC DAB converter operating in open loop, which is able to effectively realize power decoupling and reduce the capacitance requirement of the converter [18]. In this case, the double-line-frequency ripple power is effectively steered into the passive power decoupling capacitor by adjusting the duty cycle of the modulated leg.…”

Section: Introductionmentioning

confidence: 99%

Power Decoupling of a Single Phase DC-AC Dual Active Bridge Converter Based on an Integrated Bidirectional Buck/Boost Stage

et al. 2018

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In single phase DC-AC systems, double-line-frequency power ripple appears at the DC side inherently. Normally a large electrolytic capacitor can be used to reduce the power ripple at the DC side. But there are several problems with this method as it decreases the power density and reliability of the converter. In addition, a double-line-frequency current ripple appears in case a voltage source serves at the DC side, which is undesired in specific applications. This paper proposes a single phase DC-AC DAB (dual active bridge) converter with an integrated buck/boost stage for power decoupling purpose under low power condition. The proposed active power decoupling method is able to completely eliminate the double-line-frequency power ripple at the DC side. Therefore, a constant DC current can be obtained for requirements in specific DC-AC applications.

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