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- 저자 : A. van Zwam (검색결과 2 건)
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Novel Dual-Band Controller for Regulating DC-Bus Voltage That Contains A Large Voltage Ripple
Y.Wang,S.W.H. de Haan,A. van Zwam 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
Autonomous system with DC-AC converter as an interface from the battery source to the inverter load easily suffers from voltage ripples on the DC-bus at the twice load frequency (100 ㎐). A fast voltage controller for tightly regulating the DC-bus voltage with the inevitable 100 ㎐ ripples bears a rapid transient response, however always contaminating battery current with large ripples at 100 ㎐, which do harm to the battery life span. In the paper, an average current mode controller with a novel dual-band selector is introduced. This controller has two voltage-loop branches with 5 ㎐ and 641 ㎐ bandwidths, for smoothing the battery current in the steady state and regulating the deviating bus voltage in the transients, respectively. Dual-band selector determines how these two voltage-loop branches are switched to each other, aimed at attenuating transients as soon as possible. This control methodology is demonstrated by simulation for an interleaved bi-directional flyback converter that powers the DC-bus from a battery.
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Y.Wang,S.W.H. de Haan,A. van Zwam 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
Design for optimizing the efficiency of interleaved power converters requires considering many design parameters, such as the magnetizing inductance of the transformer, switching frequency, number of parallel units and parallel semiconductors. Because of the number of parameters and the non-linear relationships among the parameters, a multidimensional design optimization is not straightforward. In this paper the sensitivity of the efficiency in dependency of the value of principal design parameters is investigated by a loss model built in Mathcad file. The results are used to find a set of parameters for optimal efficiency. In addition, the results can be utilized to make trade-offs between some conflicting requirements such as efficiency versus cost.
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