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Periodically time-variant systems and harmonic analysis of quasi-resonant converters

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3 Author(s)
Shui-Sheng Qiu ; South China Univ. of Technol., Guangzhou, China ; I. M. Filanovsky ; J. Salmon

The time averaging equivalent circuit approach allows one to obtain a nonlinear differential equation of periodically time-variant system that can be applied to the harmonic analysis of quasi-resonant converters. The differential equation is solved by combination of harmonic balance and small parameter methods. This results in a system of algebraic equations from which a steady-state solution required for the harmonic analysis is obtained. First three equations of this system usually suffice for the practical analysis of converters. An example (zero-voltage switching quasi-resonant boost converter) is given

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Circuits and Systems, 1999. 42nd Midwest Symposium on  (Volume:2 )

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