| Summary: | 碩士 === 國立臺北科技大學 === 電機工程系所 === 93 === In this thesis, we derive the mathematic model of Active Power Factor Corrector (PFC), and we investigate the robustness of performance indices of PFC using Structured Single Value (SSV) which is developed in robust control theory.
First, we derive the small signal transfer function including parasitic elements effects from the small signal circuit of open loop boost converter by means of the principle of energy conservation. Audiosusceptibility, output resistance and input resistance are considered. The value of elements would change due to the using time, aging, or other environment factors, it would affect the system uncertainly.
Moreover, we use Linear Fractional Transformation (LFT) to convert the effective performance indices, which includes conjugate poles, the DC value of output resistance, and the zeros/poles of compensator, of the circuit into the LFT mathematic models.
Finally, structured singular value is used to analyze the admissible error range of element values when performance indices changes.
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