A switched-capacitor programmable filter is proposed as educational tool for the feedback compensation of power converters. The transfer function of the external feedback network, expressed in the Z-transform domain, can be assigned by means of Multiplying DACs. The cancellation of poles and zeros of switching power cells is precisely implemented even in the case they are complex. An ideal final single pole loop gain transfer function can be obtained after choosing the gain-bandwidth product and the dominant pole. Educational laboratories of power electronics in Universities awarding the MS and the Ph.D degrees can benefit from this tool. Duly reprogrammed, it avoids the realization of a dedicated controller for each power conversion exercise and it opens the possibility to investigate some aspects of the dynamic stability experimentally. The paper illustrates the compensation of a pulse width modulated step-down DC/DC converter. Measurements well fit the theoretical forecasts.

Switched-capacitor programmable filter for power processors / P.G. Maranesi, F. Belloni, M. Riva, D. Della Giustina - In: 13. European conference on power electronics and applications : EPE '09 : Barcelona, Spain, 8-10 September 2009[Piscataway] : IEEE, 2009 Sep. - ISBN 978-1-4244-4432-8. - pp. [1]-[9] (( Intervento presentato al 13. convegno European conference on power electronics and applications : EPE tenutosi a Barcellona nel 2009.

Switched-capacitor programmable filter for power processors

P.G. Maranesi
Primo
;
F. Belloni
Secondo
;
M. Riva
Penultimo
;
D. Della Giustina
Ultimo
2009-09

Abstract

A switched-capacitor programmable filter is proposed as educational tool for the feedback compensation of power converters. The transfer function of the external feedback network, expressed in the Z-transform domain, can be assigned by means of Multiplying DACs. The cancellation of poles and zeros of switching power cells is precisely implemented even in the case they are complex. An ideal final single pole loop gain transfer function can be obtained after choosing the gain-bandwidth product and the dominant pole. Educational laboratories of power electronics in Universities awarding the MS and the Ph.D degrees can benefit from this tool. Duly reprogrammed, it avoids the realization of a dedicated controller for each power conversion exercise and it opens the possibility to investigate some aspects of the dynamic stability experimentally. The paper illustrates the compensation of a pulse width modulated step-down DC/DC converter. Measurements well fit the theoretical forecasts.
Control methods for electrical systems ; education tool ; power conditioning
Settore ING-INF/01 - Elettronica
http://ieeexplore.ieee.org/xpl/RecentCon.jsp?punumber=5254890
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/69918
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