NDLI: Active damping of LC-filters for high power drives using synchronous optimal pulsewidth modulation

Content Provider	IEEE Xplore Digital Library
Author	Laczynski, T. Werner, T. Mertens, A.
Copyright Year	2008
Description	Author affiliation: Inst. for Drive Syst. & Power Electron., Leibniz Univ. of Hannover, Hannover (Laczynski, T.; Werner, T.; Mertens, A.)
Abstract	To meet the increasing demand on very low switching frequencies of power semiconductors in order to reduce switching losses, synchronous optimal pulsewidth modulation (SO-PWM) techniques provide an appropriate solution. They result from offline calculations, assuming steady state operation of the drive system. These drives are often used with an LC output filter, which represents a resonant circuit. Therefore, only in steady state operations does the combination of an LC-filter with offline optimized pulse patterns deliver satisfactory behavior of the drive system. Changes in operating conditions cause weakly damped oscillations in the filter, followed by high overcurrents in the motor, which can be described as dynamic modulation errors. In this paper, a novel control method is proposed in order to keep the benefits of SO-PWM in dynamic operations when applied to drives with LC-filters. The method actively damps the LC-filter resonance and compensates the dynamic modulation errors without increasing the switching frequency. The effectiveness and dynamic capability of the introduced control technique are presented by simulation results of a 2.4 kV induction motor drive.
Starting Page	1033
Ending Page	1040
File Size	338965
Page Count	8
File Format	PDF
ISBN	9781424416677
ISSN	02759306
DOI	10.1109/PESC.2008.4592066
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Harmonic analysis Power harmonic filters Modulation Inverters Induction motors Stators Voltage control dynamic modulation error control LC-filter medium voltage drive synchronous optimal modulation three-level voltage source inverter
Content Type	Text
Resource Type	Article

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