NDLI: AC power source based on series-connection between cascaded PWM multilevel inverter and linear power amplifier

Content Provider	IEEE Xplore Digital Library
Author	Beltrame, R.C. Desconzi, M.I. da Silva Martins, M.L. Rech, C. Hey, H.L.
Copyright Year	2011
Description	Author affiliation: GEPOC - UFSM, 97105-900, Santa Maria, Brazil (Beltrame, R.C.; Desconzi, M.I.; Rech, C.; Hey, H.L.) \|\| PROCEN - UTFPR 85503-390, Pato Branco, Brazil (da Silva Martins, M.L.)
Abstract	This paper proposes a hybrid ac power source by associating a symmetrical cascaded PWM multilevel inverter (main amplifier) with a low-voltage and low-power linear power amplifier (correction amplifier) with the aim of synthesizing high-fidelity voltage waveforms without penalizing the system efficiency. The main amplifier operates with phase-shift pulse-width modulation, enabling to reduce the output low-pass filter requirements. An accurate analysis of the main amplifier parameters, such as the number of cells and the output filter devices, which have impact on the current and voltage ripples, phase displacement and under/overshoots caused by load variation, is carried out through the paper, since the correction amplifier must be designed to compensate for any distortion on main amplifier voltage waveform. As a result, the compensation capability of the correction amplifier is defined. Thereafter, a design methodology for both main and correction amplifiers is introduced as well as a control circuit is proposed. Experimental results are presented to validate the proposed approach.
Starting Page	1
Ending Page	10
File Size	487376
Page Count	10
File Format	PDF
ISBN	9781612841670
e-ISBN	9789075815146
e-ISBN	9789075815153
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-30
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	EPE ASSOCIATION
Subject Keyword	Multilevel converters Highly dynamic drive Low pass filters Inverters Power supply Topology Voltage control Inductors Linear drive Power harmonic filters Voltage source inverters (VSI)
Content Type	Text
Resource Type	Article

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