| Author: | Lei, Weng-hong |
| Title: | Modelling and simulation of a non-linear circuit |
| Degree: | M.Phil. |
| Year: | 2001 |
| Subject: | Electric current converters Switching power supplies Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Electronic and Information Engineering |
| Pages: | 137 leaves : ill. ; 30 cm |
| Language: | English |
| Abstract: | Device Represented of Averaged Fourier Transforms (DRAFT) has been proved to be fruitful in generating SPICE macromodels for series, parallel and series-parallel resonant converters. However, The macromodels are inaccurate when state variables are not sinusoidal and the more accurate version of the models lead to convergence problems in a simulator. In this thesis, a novel macromodel and a new SPICE simulation program are presented. An algorithm of the new macromodel is extended from the averaged Fourier transforms. The algorithm uses actual solutions of state variables. A SPICE macromodel for a resonant converter is generated by the algorithm. The simulated results of the new macromodel are much more accurate than those given by the previous macromodels. A new nonlinear dependent source is proposed to enhance SPICE. The new source can solve equations of the form f (x)=0 with no convergence problems. The implementation of the new source is presented. A macromodel for a resonant converter is taken as an example to demonstrate the application of the new source. In addition, a new SPICE simulation program is written based on SPICE3 using object-oriented programming paradigms. The internal structure of the new SPICE simulation program is outlined. The object-oriented programming paradigms provide a set of features to simplify the internal structure of the new SPICE. When comparing with SPICE3, the new SPICE has many advantages for further development and maintenance. |
| Rights: | All rights reserved |
| Access: | open access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b15488160.pdf | For All Users | 3.72 MB | Adobe PDF | View/Open |
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