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An adaptive passivity-based controller for a unity power factor rectifier
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DOI：10.1109/87.930975.png)
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Abstract
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We develop in this paper a passivity-based control scheme for the Feedback regulation of a class of switched power converters commonly addressed as power factor precompensators. In such applications, aside from load voltage regulation to a prespecified constant level, a vital additional control objective consists in keeping the input power factor close to unity. By forcing the converter input current to follow a sinusoidal reference signal which is in phase with the supplied voltage, one may approximately satisfy both control objectives within a single power stage. A further complication in our design is to consider the output load, usually modeled by a resistance, as unknown. Experimental results are furnished for assessing the performance of the proposed feedback control law.
Keywords:
AC-dc power conversion
adaptive control
dissipative systems
nonlinear systems
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