Two-stage optimization method for efficient power converter design including light load operation

Yu, R. and Pong, B. M. H. and Ling, B. W.-K. and Lam, J. (2012) Two-stage optimization method for efficient power converter design including light load operation. IEEE Transactions on Power Electronics, 27 (3). pp. 1327-1337. ISSN 0885-8993

Full content URL: http://dx.doi.org/10.1109/TPEL.2011.2114676

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Item Type:Article
Item Status:Live Archive

Abstract

Power converter efficiency is always a hot topic for switch mode power supplies. Nowadays, high efficiency is required over a wide load range, e.g., 20, 50, and 100 load. Computer-aided design optimization is developed in this research study, to optimize off-line power converter efficiency from light load to full load. A two-stage optimization method to optimize power converter efficiency from light load to full load is proposed. The optimization procedure first breaks the converter design variables into many switching frequency loops. In each fixed switching frequency loop, the optimal designs for 20, 50, and 100 load are derived separately in the first stage, and an objective function using the optimization results in the first stage is formed in the second stage to consider optimizing efficiencies at 20, 50, and 100 load. Component efficiency models are also established to serve as the objective functions of optimizations. Prototypes 400 V to 12 V/25 A 300 W two-FET forward converters are built to verify the optimization results. © 2011 IEEE.

Keywords:Converter design, Converter efficiency, Efficiency models, Efficient power, First breaks, Fixed switching frequency, Forward converters, Full-load, Full-load efficiency, light load efficiency, Light loads, Load range, Objective functions, Optimal design, Optimization procedures, Research studies, Switch-mode power supplies, Two stage optimizations, Computer aided design, Efficiency, Power converters, Switching frequency, Optimization
Subjects:H Engineering > H100 General Engineering
H Engineering > H630 Electrical Power
Divisions:College of Science > School of Engineering
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ID Code:11184
Deposited On:13 Jan 2014 12:32

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