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Title: Steady-State and Small-Signal Analysis of A-Source Converter

Abstract

This paper presents a detailed steady-state analysis and ac small-signal modeling of the power stage of pulse-width modulated A-source converter. The voltage and current waveforms along with their corresponding expressions describing the converter operation are presented in detail. The input-to-output and input-to-capacitor dc voltage transfer functions are determined. The minimum inductance required to ensure continuous conduction mode is derived. The expressions for the semiconductor devices stresses are also presented. The dc, averaged equivalent circuit is derived using the circuit averaging technique. A complete derivation of the small-signal model including the converter parasitic resistances are presented followed by the power stage transfer functions relevant to the capacitor voltage loop, such as: 1) duty cycle-to-capacitor voltage; and 2) input-to-capacitor voltage. In addition, the expressions for the network input impedance and output impedance are derived. Finally, experimental validations of the derived small-signal models are performed, both in frequency and time domain for a laboratory prototype of an A-source converter. The theoretical predictions were in good agreement with the experimental results over a wide range of frequencies.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [1]; ORCiD logo [4]
  1. Wright State Univ., Dayton, OH (United States)
  2. Univ. of Technology Sydney (Australia)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Aalborg Univ. (Denmark)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1474486
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Power Electronics
Additional Journal Information:
Journal Volume: 33; Journal Issue: 8; Journal ID: ISSN 0885-8993
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Ayachit, Agasthya, Siwakoti, Yam P., Galigekere, Veda Prakash Nagabhushana, Kazimierczuk, Marian K., and Blaabjerg, Frede. Steady-State and Small-Signal Analysis of A-Source Converter. United States: N. p., 2017. Web. doi:10.1109/TPEL.2017.2756626.
Ayachit, Agasthya, Siwakoti, Yam P., Galigekere, Veda Prakash Nagabhushana, Kazimierczuk, Marian K., & Blaabjerg, Frede. Steady-State and Small-Signal Analysis of A-Source Converter. United States. doi:10.1109/TPEL.2017.2756626.
Ayachit, Agasthya, Siwakoti, Yam P., Galigekere, Veda Prakash Nagabhushana, Kazimierczuk, Marian K., and Blaabjerg, Frede. Tue . "Steady-State and Small-Signal Analysis of A-Source Converter". United States. doi:10.1109/TPEL.2017.2756626. https://www.osti.gov/servlets/purl/1474486.
@article{osti_1474486,
title = {Steady-State and Small-Signal Analysis of A-Source Converter},
author = {Ayachit, Agasthya and Siwakoti, Yam P. and Galigekere, Veda Prakash Nagabhushana and Kazimierczuk, Marian K. and Blaabjerg, Frede},
abstractNote = {This paper presents a detailed steady-state analysis and ac small-signal modeling of the power stage of pulse-width modulated A-source converter. The voltage and current waveforms along with their corresponding expressions describing the converter operation are presented in detail. The input-to-output and input-to-capacitor dc voltage transfer functions are determined. The minimum inductance required to ensure continuous conduction mode is derived. The expressions for the semiconductor devices stresses are also presented. The dc, averaged equivalent circuit is derived using the circuit averaging technique. A complete derivation of the small-signal model including the converter parasitic resistances are presented followed by the power stage transfer functions relevant to the capacitor voltage loop, such as: 1) duty cycle-to-capacitor voltage; and 2) input-to-capacitor voltage. In addition, the expressions for the network input impedance and output impedance are derived. Finally, experimental validations of the derived small-signal models are performed, both in frequency and time domain for a laboratory prototype of an A-source converter. The theoretical predictions were in good agreement with the experimental results over a wide range of frequencies.},
doi = {10.1109/TPEL.2017.2756626},
journal = {IEEE Transactions on Power Electronics},
number = 8,
volume = 33,
place = {United States},
year = {2017},
month = {9}
}

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