2006•The Transactions of the Korean Institute of Power ElectronicsRequires access

LC Trap Filter Design of Single Phase NPC Multi-Level PWM Inverters for Harmonic Reduction

Soohong Kim, KimYoonHo, 이재학

Abstract

In this paper, a design approach of LC trap filter for output side harmonic reduction of single phase NPC multilevel inverter is proposed, and THD of the output voltage and harmonic FFT of the output current are analyzed. The proposed filter consists of a conventional LCR filter cascaded with an LC trap filter and it is tuned to inverter switching frequency. A NPC multilevel inverter inverter is used an inverter system for high power application and DSP(TMS320C31) is used for the controller. The effectiveness of the proposed system confirmed through simulation and experimental results.

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Key concepts: Total harmonic distortion, Inverter, Harmonic, Control theory (sociology), Filter (signal processing), Pulse-width modulation, Electronic engineering, LC circuit