A Cost-Constrained Active Capacitor for a Single-Phase Inverter

Haoran Wang; Huai Wang; Frede Blaabjerg

doi:10.1109/TPEL.2019.2958713

A Cost-Constrained Active Capacitor for a Single-Phase Inverter

Haoran Wang^*, Huai Wang, Frede Blaabjerg

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

14 Citations (Scopus)

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Abstract

The active capacitor concept based on power electronic circuits has been proposed recently to exceed the physical limit of the passive capacitor. It retains the physical convenience of use as a passive capacitor and has the potential to increase either the power density or the lifetime depending on the applications. However, the cost of the existing design by using ceramic or film capacitors to achieve extreme performance increases a lot, which must be taken into account in the design from the industry aspect. This article proposes a cost-constrained design of an active capacitor used for dc-link applications. It is implemented based on high-current electrolytic capacitors instead of film capacitors or ceramic capacitors. A model-based optimization design procedure is discussed in terms of performance factors of interest. A case study of a 5.5-kW single-phase inverter demonstrates a 38% volume reduction of the dc link with the proposed active capacitor under specific constraints of cost, volume, power loss, and lifetime. The outcomes move one step further for the practical application of the active capacitor concept.

Original language	English
Article number	8930059
Journal	IEEE Transactions on Power Electronics
Volume	35
Issue number	7
Pages (from-to)	6746-6760
Number of pages	15
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2019.2958713
Publication status	Published - Jul 2020

Bibliographical note

Funding Information:
Manuscript received August 1, 2019; revised September 27, 2019; accepted November 26, 2019. Date of publication December 6, 2019; date of current version March 13, 2020. This work was supported in part by Innovation Fund Denmark through the Advanced Power Electronic Technology and Tools Project and in part by OMRON Corporation. Recommended for publication by Associate Editor T. Shimizu. (Corresponding author: Haoran Wang.) The authors are with the Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark (e-mail: hao@et.aau.dk; hwa@et.aau.dk; fbl@et.aau.dk).

Publisher Copyright:
© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

Active capacitor
cost
dc-link capacitor
power decoupling
single-phase inverter

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10.1109/TPEL.2019.2958713

Open Access ManuscriptAccepted author manuscript, 2 MBLicence: CC BY 4.0

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Cite this

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abstract = "The active capacitor concept based on power electronic circuits has been proposed recently to exceed the physical limit of the passive capacitor. It retains the physical convenience of use as a passive capacitor and has the potential to increase either the power density or the lifetime depending on the applications. However, the cost of the existing design by using ceramic or film capacitors to achieve extreme performance increases a lot, which must be taken into account in the design from the industry aspect. This article proposes a cost-constrained design of an active capacitor used for dc-link applications. It is implemented based on high-current electrolytic capacitors instead of film capacitors or ceramic capacitors. A model-based optimization design procedure is discussed in terms of performance factors of interest. A case study of a 5.5-kW single-phase inverter demonstrates a 38% volume reduction of the dc link with the proposed active capacitor under specific constraints of cost, volume, power loss, and lifetime. The outcomes move one step further for the practical application of the active capacitor concept.",

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A Cost-Constrained Active Capacitor for a Single-Phase Inverter

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