Topology and Configuration Selection for DC/DC Converters in Space Electrical Power Systems Based on Comparative Reliability Evaluation

Emerging Trends in Electrical, Electronics & Instrumentation Engineering: An international Journal (EEIEJ), Vol. 2, No. 1, February 2015

5 Pages Posted: 20 Jun 2019

See all articles by Reaz Amjadifard

Reaz Amjadifard

Iran Space Research Center

Alireza Fasooniehchi

affiliation not provided to SSRN

Ehsan Kosari

affiliation not provided to SSRN

Date Written: February 2015

Abstract

Selection of DC/DC converter topology is one of the most challenging aspects in space Electrical Power Systems (EPS) design and development. It both highly, affects and is affected from EPS reliability requirements among the other EPS performance specifications. So ranking of DC/DC converters based on End-Of-Life (EOL) reliability is an undeniable need.

In this paper, reliability of four DC/DC converters including buck, forward, fly-back, and Push-pull, as candidates for a 5-years-long, Low-Earth-Orbit (LEO) space mission, are evaluated and compared. Converters are assumed having similar design requirements and supervision and control elements with different power conversion parts and negligible reliability-affecting excess circuits.

Standard process is undertaken in preliminary and critical design of converters for reliability improvement and prediction. To reduce the converters’ parts stress regarding the particles radiation and the thermal cycling effects of the space environment, a derating process is applied to the primary design based on ECSS standard. Derated components are then selected in such a way to make possible calculating components failure-rates based on the MIL-HDBK-217F data and equations as the major EEE components failure-rate data reference. Reliability modelling and analysis for the converters is done by reliability block diagram (RBD) method, and the converters are then comparatively evaluated based on the analysis results. According to the results, buck converter is the most reliable one and push-pull is the least. Among the isolated topologies, fly-back is the best one from the reliability point of view.

Keywords: Reliability, Mil-HDBK-217F, Derating, Failure Analysis, DC/DC converters, Converters topology

Suggested Citation

Amjadifard, Reaz and Fasooniehchi, Alireza and Kosari, Ehsan, Topology and Configuration Selection for DC/DC Converters in Space Electrical Power Systems Based on Comparative Reliability Evaluation (February 2015). Emerging Trends in Electrical, Electronics & Instrumentation Engineering: An international Journal (EEIEJ), Vol. 2, No. 1, February 2015, Available at SSRN: https://ssrn.com/abstract=3404052 or http://dx.doi.org/10.2139/ssrn.3404052

Reaz Amjadifard (Contact Author)

Iran Space Research Center

Iran

Alireza Fasooniehchi

affiliation not provided to SSRN

Ehsan Kosari

affiliation not provided to SSRN

Do you have negative results from your research you’d like to share?

Paper statistics

Downloads
56
Abstract Views
321
Rank
665,096
PlumX Metrics