AC‐Link Universal Power Converters: A New Class of Power Converters for Renewable Energy and Transportation

Amirabadi, Mahshid; Toliyat, H.A.

doi:10.1002/9781118755525.ch5

Cited by 3 publications

(2 citation statements)

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“…The alternating link current and the short resonating modes of this converter solve the problems associated with the converter proposed in [11]. This topology was originally proposed in [12] and the present authors of this paper studied the principles of the operation and different applications of this converter in [13][14][15][16][17][18][19][20][21]. In [18] and [19] the application of this converter in photovoltaic power generation was studied and the performance of the dc to ac and hybrid dc to ac configurations were experimentally evaluated.…”

Section: Introductionmentioning

confidence: 99%

“…The detailed experimental results corresponding to the ac-ac configuration are presented in this paper. As will be shown, an important feature of this ac-ac (a) dc-dc buck-boost converter (b) dc-dc ac-link buck-boost converter [20,21] (c) bidirectional dc-dc ac-link buck-boost converter [20,21] (d) bidirectional ac-ac ac-link buck-boost converter [20,21] (e) Soft-switching bidirectional ac-ac ac-link buck-boost converter [12] (f) Soft-switching bidirectional ac-ac ac-link buck-boost converter with galvanic isolation [12] Fig . 1 The evolution of the soft switching ac-ac ac-link buck-boost converter [20,21] IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS converter is the capability of the converter to control the input power factor.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Soft-Switching AC-Link Three-Phase AC–AC Buck–Boost Converter

Amirabadi

Baek

Toliyat

et al. 2015

IEEE Trans. Ind. Electron.

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In this paper, the soft-switching ac-link ac-ac buckboost converter will be studied in more detail. This single-stage converter, which is in essence an extension of the dc-dc buck-boost converter, can be an excellent alternative to dc-link converters. Being a buck-boost converter, this converter is capable of both stepping-up and stepping-down the voltage. The link current and voltage are both alternating and their frequency can be as high as permitted by the switches and the sampling time of the microcontroller. This eliminates the need for dc inductors or dc electrolytic capacitors, and the main energy storage element is an ac inductor (L). Moreover, in this converter galvanic isolation can be provided by adding a single-phase high frequency transformer to the link. Therefore, the proposed converter is expected to be more compact compared to the conventional dc-link converter. The other advantage of this converter is the soft-switching of the switches, which is feasible by adding a small capacitor (C) to the link. In this paper, design and analysis of this converter will be studied in detail. In order to accurately analyze this converter, the effect of the LC link resonance on the performance of the converter will be studied. This analysis helps evaluating the performance of the converter at low power levels when the resonating time of the LC link is not negligible. Using this analysis, the link peak current and the link frequency may be calculated at any point of operation. The accuracy of this method is verified through simulations and experiments. Detailed comparison of the proposed converter with the dc-link converter will be also presented in this paper. It will be shown that despite having more switches, the current rating of the switches is lower in this converter. Moreover, the efficiency of the two converters will be compared. Finally, the performance of the soft switching ac-link ac-ac buck-boost converter is experimentally evaluated in this paper. It will be shown that the converter has the possibility of both changing the frequency and the voltage. Both step-up and step-down operations will be verified through experiments.Index Terms-Soft-switching, ac-ac converter, buck-boost converter, ac link, high frequency ac link, zero voltage turn on, galvanic isolation, high frequency ac transformer Manuscript Current Voltage Current Voltage Current Voltage Current 0278-0046 (c)

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