2012•Guangdong Electric PowerRequires access

Design of Cascading Pulse Width Modulation Rectifier Based on CPS-SPWM

Jianfeng Zhao

Abstract

On the basis of establishing average model for pulse width modulation(PWM) rectifier of cascading H-bridge,the paper analyzes harmonic characteristics of single polarity and bipolar modulation algorithms.It proposes cascading modulation algorithm based on independent modulation of left and right bridge arms and analyzes mechanism of voltage imbalance at cascading DC side and modulation method;it presents balance control algorithm at DC side based on reconstitution of modulation ratio.Simulation by MATLAB/Simulink verifies effectiveness of modulation strategy and control strategy.

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Available abstract

Key concepts: Pulse-width modulation, Modulation (music), Rectifier (neural networks), MATLAB, Engineering, Harmonic, Electronic engineering, H bridge