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

Journal Article · · IEEE Transactions on Power Electronics
 [1];  [2];  [3];  [1];  [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)
+ Show Author Affiliations

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1474486
Journal Information:
IEEE Transactions on Power Electronics, Journal Name: IEEE Transactions on Power Electronics Journal Issue: 8 Vol. 33; ISSN 0885-8993
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

Cited By (5)

A class of half-bridge quasi-Z-source inverters: Detailed steady-state analysis in various operating states, design considerations, and derivation of general topology journal August 2018
A fully soft switched high step‐up SEPIC‐boost DC‐DC converter with one auxiliary switch journal February 2019
Design and analysis of a high step‐up single‐switch coupled inductor DC‐DC converter with low‐voltage stress on components for PV power application
  • Eskandarpour Azizkandi, Mahmoodreza; Sedaghati, Farzad; Shayeghi, Hossein
  • International Journal of Circuit Theory and Applications, Vol. 47, Issue 7 https://doi.org/10.1002/cta.2633
journal April 2019
Modeling and analysis of LC filter integrated quasi‐Z source indirect matrix converter journal April 2020
Modelling and dynamical analysis of a DC–DC converter with coupled inductors journal February 2019

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