Intermediate DC-Link Capacitor Reduction in a Two-Stage Cascaded AC/DC Converter for More Electric Aircrafts

Ayan Mallik; Alireza Khaligh

doi:10.1109/TVT.2017.2748582

Intermediate DC-Link Capacitor Reduction in a Two-Stage Cascaded AC/DC Converter for More Electric Aircrafts

Ayan Mallik, Alireza Khaligh

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

In this paper, an innovative method to minimize the intermediate dc-link capacitance in a cascaded two-stage combination of a three-phase six-switch power factor correction (PFC) and phase-shifted full-bridge (PSFB) dc/dc stage is introduced and analyzed. The proposed strategy has a significant impact on the minimization of the overall system weight and volume. Fundamentally, the method is based on minimizing the switching fundamental component of the dc-link current and is established by imposing a separate constraint on the phase duty ratios without compromising the unity PFC action. Furthermore, the control loop takes care of regulating the intermediate dc-link voltage along with the final output voltage. A 6 kW laboratory prototype of the integrated three-phase PFC and PSFB dc/dc as a part of auxiliary power unit in more-electric airplanes is developed and designed to validate the proposed algorithm. The experimental results show a conversion efficiency of 95.4% at full load, input total harmonic distortion of 4.1%, power factor of 0.998, output voltage ripple of ±1%, and a reduction of dc-link capacitor by 60%.

Original language	English (US)
Pages (from-to)	935-947
Number of pages	13
Journal	IEEE Transactions on Vehicular Technology
Volume	67
Issue number	2
DOIs	https://doi.org/10.1109/TVT.2017.2748582
State	Published - Feb 2018
Externally published	Yes

Keywords

Capacitor reduction
DC link
PFC
PSFB
cascaded AC/DC
two stage

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Electrical and Electronic Engineering
Applied Mathematics

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10.1109/TVT.2017.2748582

Cite this

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title = "Intermediate DC-Link Capacitor Reduction in a Two-Stage Cascaded AC/DC Converter for More Electric Aircrafts",

abstract = "In this paper, an innovative method to minimize the intermediate dc-link capacitance in a cascaded two-stage combination of a three-phase six-switch power factor correction (PFC) and phase-shifted full-bridge (PSFB) dc/dc stage is introduced and analyzed. The proposed strategy has a significant impact on the minimization of the overall system weight and volume. Fundamentally, the method is based on minimizing the switching fundamental component of the dc-link current and is established by imposing a separate constraint on the phase duty ratios without compromising the unity PFC action. Furthermore, the control loop takes care of regulating the intermediate dc-link voltage along with the final output voltage. A 6 kW laboratory prototype of the integrated three-phase PFC and PSFB dc/dc as a part of auxiliary power unit in more-electric airplanes is developed and designed to validate the proposed algorithm. The experimental results show a conversion efficiency of 95.4% at full load, input total harmonic distortion of 4.1%, power factor of 0.998, output voltage ripple of ±1%, and a reduction of dc-link capacitor by 60%.",

keywords = "Capacitor reduction, DC link, PFC, PSFB, cascaded AC/DC, two stage",

author = "Ayan Mallik and Alireza Khaligh",

note = "Funding Information: Manuscript received February 16, 2017; revised April 24, 2017, July 6, 2017, and August 27, 2017; accepted August 28, 2017. Date of publication September 4, 2017; date of current version February 12, 2018. The work was supported by the Boeing Company. The review of this paper was coordinated by Dr. B. Akin. (Corresponding author: Alireza Khaligh.) The authors are with the Maryland Power Electronics Laboratory, Department of Electrical and Computer Engineering, Institute for Systems Research, University of Maryland, College Park, MD 20742 USA (e-mail: mallik@umd.edu; khaligh@ece.umd.edu). Publisher Copyright: {\textcopyright} 2017 IEEE.",

year = "2018",

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AU - Khaligh, Alireza

N1 - Funding Information: Manuscript received February 16, 2017; revised April 24, 2017, July 6, 2017, and August 27, 2017; accepted August 28, 2017. Date of publication September 4, 2017; date of current version February 12, 2018. The work was supported by the Boeing Company. The review of this paper was coordinated by Dr. B. Akin. (Corresponding author: Alireza Khaligh.) The authors are with the Maryland Power Electronics Laboratory, Department of Electrical and Computer Engineering, Institute for Systems Research, University of Maryland, College Park, MD 20742 USA (e-mail: mallik@umd.edu; khaligh@ece.umd.edu). Publisher Copyright: © 2017 IEEE.

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N2 - In this paper, an innovative method to minimize the intermediate dc-link capacitance in a cascaded two-stage combination of a three-phase six-switch power factor correction (PFC) and phase-shifted full-bridge (PSFB) dc/dc stage is introduced and analyzed. The proposed strategy has a significant impact on the minimization of the overall system weight and volume. Fundamentally, the method is based on minimizing the switching fundamental component of the dc-link current and is established by imposing a separate constraint on the phase duty ratios without compromising the unity PFC action. Furthermore, the control loop takes care of regulating the intermediate dc-link voltage along with the final output voltage. A 6 kW laboratory prototype of the integrated three-phase PFC and PSFB dc/dc as a part of auxiliary power unit in more-electric airplanes is developed and designed to validate the proposed algorithm. The experimental results show a conversion efficiency of 95.4% at full load, input total harmonic distortion of 4.1%, power factor of 0.998, output voltage ripple of ±1%, and a reduction of dc-link capacitor by 60%.

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Intermediate DC-Link Capacitor Reduction in a Two-Stage Cascaded AC/DC Converter for More Electric Aircrafts

Abstract

Keywords

ASJC Scopus subject areas

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