A Method for Computer-Aided Analysis of Differential Mode Input Filters

A new method for computer-aided analysis of differential mode input filters is presented in this paper, aiming to compute in an efficient manner input current spectra of switching converters in a wide frequency range. The method is intended to facilitate computer-aided design of input filters, and i...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2017-06, Vol.64 (6), p.4741-4750
Main Authors: Miric, Spasoje Milorad, Pejovia, Predrag Vojislav
Format: Article
Language:English
Subjects:
CAD
Circuit simulation
Circuits
Computational modeling
Computer aided design
Computer simulation
computer-aided analysis
continuous-time systems
Converters
Electric filters
electromagnetic interference (EMI)
Frequency ranges
Integrated circuit modeling
Mathematical model
power conversion harmonics
State-space methods
Steady-state
Superposition (mathematics)
Switches
Switching
Switching circuits
Waveforms
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Description
Summary:A new method for computer-aided analysis of differential mode input filters is presented in this paper, aiming to compute in an efficient manner input current spectra of switching converters in a wide frequency range. The method is intended to facilitate computer-aided design of input filters, and it is based on simulation of accompanying averaged circuit and superimposing the switching ripple to the averaged waveforms. A method to derive a continuous-time averaged circuit model is described. To obtain the model, the converter is partitioned into a circuit part, characterized by equations common for describing electric circuits, and a modulator part, which generates duty ratio functions. Three modulation methods are described, and superposition of associated switching ripple is formalized for each of them. The method is illustrated in simulation of two converters on the design of their input filters.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2017.2674584