Bifurcation Behavior of SPICE Simulations of Switching Converters: A Systematic Analysis of Erroneous Results

The SPICE simulation program is widely used as a brute force simulator for analyzing and designing switching power converters. Results from SPICE are mostly useful, but their integrity is sometimes questionable as erroneous results could be obtained which may not reflect the true behavior of the cir...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2007-09, Vol.22 (5), p.1743-1752
Main Authors: Xiaoqun Wu, Siu-Chung Wong, Tse, C.K., Junan Lu
Format: Article
Language:English
Subjects:
Analytical models
Applied sciences
Bifurcation
Bifurcations
Chaos
Circuit properties
Circuit simulation
Circuits
Computer simulation
Convergence
Convertors
Electric currents
Electric, optical and optoelectronic circuits
Electrical engineering
Electrical engineering. Electrical power engineering
Electrical machines
Electronic circuits
Electronics
Error correction
Errors
Exact sciences and technology
Inductance
Parasitic capacitance
power electronics
Power electronics, power supplies
Signal convertors
Size control
SPICE
Spices
Switching
Switching converters
Theoretical study. Circuits analysis and design
Tolerances
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Summary:The SPICE simulation program is widely used as a brute force simulator for analyzing and designing switching power converters. Results from SPICE are mostly useful, but their integrity is sometimes questionable as erroneous results could be obtained which may not reflect the true behavior of the circuits being simulated. Various parameters in SPICE are crucial in controlling the convergence and accuracy of the simulated results, e.g., relative error tolerance and maximum integration step size. In this paper, we study the system consisting of the SPICE simulation algorithm and the circuit being simulated. Specifically, we describe the generation of flawed solutions in terms of bifurcation of the system under parameter variations. Erroneous results have been collected for different relative error tolerances, maximum integration step sizes, and parasitic inductance and capacitance. These flawed solutions can be analyzed in terms of the manifestation of period-doubling bifurcation and chaotic behavior under variation of selected simulation parameters. This paper provides a systematic approach to rationalizing the behavior of the SPICE simulator, its practical significance being in the identification of the ranges of simulation parameters for which flawed solutions can be produced.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2007.904207