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Adaptive control schemes for stabilizing switching frequency of sliding mode controlled power converters | IEEE Conference Publication | IEEE Xplore

Adaptive control schemes for stabilizing switching frequency of sliding mode controlled power converters


Abstract:

A major disadvantage of applying sliding mode control to power converters is that the steady-state switching frequency is affected by line and load variations. This is un...Show More

Abstract:

A major disadvantage of applying sliding mode control to power converters is that the steady-state switching frequency is affected by line and load variations. This is undesirable as it complicates the input and output filters' design. A possible solution is to incorporate adaptive control schemes into the controller. This paper presents a thorough investigation into the problem and solution. Experimental results confirm that the adaptive control schemes are capable of reducing switching frequency variations.
Date of Conference: 11-14 September 2005
Date Added to IEEE Xplore: 07 August 2006
Print ISBN:90-75815-09-3
Conference Location: Dresden, Germany

Introduction

Despite their stability and robustness against parameter, line, and load variations (i.e. their ability to handle large transient disturbances) [1], sliding mode (SM) controlled power converters generally suffer from significant switching frequency variation when the input and load is varied [2], [3]. Variable switching frequency operation complicates the design of the input and output filters and designing of filters under a worst-case (lowest) frequency condition will result in oversized filters. Hence, it is desirable to operate the converters at a constant switching frequency that does not deviate too far from its nominal value.

References

References is not available for this document.