Low-complexity, high frequency parametric system identification method for switched-mode power converters
| Autor: | Christoph Unterrieder, Robert Priewasser, Harald Gietler, Andreas Berger, Michael Lunglmayr |
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| Rok vydání: | 2017 |
| Předmět: |
Engineering
Basis (linear algebra) business.industry Buck converter 020208 electrical & electronic engineering System identification 020206 networking & telecommunications 02 engineering and technology Converters Transfer function Least squares Power (physics) Control theory 0202 electrical engineering electronic engineering information engineering Electronic engineering business Constant (mathematics) |
| Zdroj: | 2017 IEEE Applied Power Electronics Conference and Exposition (APEC). |
| Popis: | Online system identification provides the possibility to track system changes and thus is the basis for successive adaption of control parameters. This paper introduces a concept for fast, efficient and accurate coefficient estimation of time-discrete transfer functions. The presented approach approximates least squares and, compared to well established algorithms, it drastically reduces the computational-complexity, while maintaining sufficient accuracy. In the experimental setup this technique has been applied to a dc-dc buck converter. For this application the proposed method is especially beneficial, since it significantly reduces the system excitation time compared to the state-of-the-art. This is achieved by using higher switching frequencies, while keeping the amount of used switching periods constant. Consequently, the proposed concept can be integrated into the start-up procedure of the converter module. |
| Databáze: | OpenAIRE |
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