Symbolic large-signal simulation of switched circuits

Wojciechowski, Jacek; Sawionek, B.; Michalski, Z.; Vlach, J.

doi:10.1007/bf01202296

Cited by 3 publications

(5 citation statements)

References 10 publications

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“…However, due to the potential appearance of Dirac impulse when ISM change its states, purely numerical algorithms used in conventional general-purpose or especially designed circuit simulators are very difficult, if not impossible, to handle this problem; in addition, there exists convergence and calculating precision problems due to their closely relation to circuit parameters and step size [1]; even more, it is necessary to solve circuit equation in every step hence they are time-consuming methods.…”

Section: Introductionmentioning

confidence: 99%

“…But SSC has strongly nonlinear characteristics. In their preliminary design stage, ideal switch module (ISM) of D and S elements is often used for the purpose of improving simulation efficiency and simplifying circuit assessment [1]- [7].…”

Section: Introductionmentioning

confidence: 99%

“…Hence some mixed symbolic-numerical algorithms have specially been introduced [6]- [7]. In fact, symbolic analysis method opens an effective way to get better insight to essential circuit behaviors [1]- [3] that it has been successfully used in various scale linear analog integrated circuit analysis, auto-design and syntheses. As far as SSC with ISM is concerned, due to its topology is changeable and solution piecewise continuity with respect to time, algorithms in literature are still low-efficient and improper to SSC' analysis.…”

Section: Introductionmentioning

confidence: 99%

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A Symbolic Analysis Method to Ideal Soft Switching Circuit System

Zou

2007

2007 2nd IEEE Conference on Industrial Electronics and Applications

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Soft Switching Circuits (SSC) are strongly nonlinear system. In their analysis, Ideal switch module (ISM) is often used to improve simulation efficiency and assess the design quality, but Dirac impulse may appear. Conventional numerical circuit simulators have difficulty handling this problem and also have convergence and precision problems. Symbolic analysis method not only overcomes these problems, but also provides avenues to get insight to fundamental circuit behaviors. This paper, based on Matlab/Maple, presents a symbolic method for SSC analysis. This method regards switched elements as linear resistances and obtains the general symbolic circuit solutions expression in s-domain by solving the equations once only. Performing limit computation and inverse Laplace transformation to this expression with appropriate algorithm, the closed-form piecewise to time analytical solutions as well as the SSC' working topology transitions can be obtained. Hence, these results can make the circuit evaluation and auto-design more effectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Symbolic Analysis Method to Ideal Soft Switching Circuit System

Zou

2007

2007 2nd IEEE Conference on Industrial Electronics and Applications

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“…1 b,c) and use a dedicated time-domain simulation [4], [5], [6], [8], [10], [12], [15], [16], [19], [23], [27], [31], [32], [34], [37], [38], [40], [41], [46], [47], [52], [56], [57], [58], [59], [65], [68], [63], [72], [73] (e.g. switching topology or piecewise-linear).…”

Section: B Scope Of the Papermentioning

confidence: 99%

“…and solution of substitute equations at switching instances [4], [5], [15], [40], [41], [57], [58], [59], [68], [71], [73], on formulation of dedicated forms of state equations [34], [56], [65], as well as based on piece-wise linear equations [46], [47]. Due to elimination of switching effects, these specializes algorithms are of higher numerical efficiency comparing to traditional methods, e.g.…”

mentioning

confidence: 99%

Computer-Aided Multi-Layer Design of Switch-Mode Power Circuits

Wojciechowski¹,

Modzelewski²,

Ogrodzki³

et al. 2010

International Journal of Electronics and Telecommunications

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Computer-Aided Multi-Layer Design of Switch-Mode Power CircuitsSwitch-mode circuits are used as power processors, e.g. DC/DC converters, synchronous rectifiers, high-frequency resonant power amplifiers. Their efficient computer-aided design is a technical problem only partly resolved so far. This paper presents a multi-layer CAD methodology for switch-mode power circuits. It discusses several levels of modeling of switching devices. First rough design verification is feasible using ideal switch models. It gives a satisfactory first-cut design. Then full models and general-purpose tools provide more exact verification of the design. At this exact step the design procedure makes use of interactive improvement followed by automatic optimization of some quality based objective functions. The proposed methodology is shown to be especially useful for high power class-D voltage-switching resonant amplifiers, where the so far used experimental optimization is extremely cost consuming.

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