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Browsing by Author "Wang, Bo-Han"

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    Harmonic Elimination for PWM Inverter
    (2017-01-01)
    Wang, Bo-Han
    ;
    Huang, Ruei-Yu
    ;
    Lee, An-Chen
    ;
    機械工程學系
    ;
    Department of Mechanical Engineering
    For a PWM inverter system, the output ac current is expected to be a sinusoidal waveform after filtering; however, PWM inverters have two drawbacks causing distortion of output waveform. One is the presence of harmonics, and the other is the variations of the system parameters. In this paper, a robust Doubly Coprime Factorization Disturbance Observer (robust DCFDOB) is applied to a dc-to-ac inverter. The proposed robust DCFDOB involves the H infinity -loop shaping method to guarantee the robust stability and robust performance. Experiment results are given to illustrate the effectiveness of the robust DCFDOB.