Jatan C. Shah

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AC-DC three-phase rectifiers that can operate with input power factor correction are either boost-type converters or buck-type converters that are typically implemented using six converter switches. In this paper, alternative rectifier topologies that use fewer converter switches are reviewed. The features of each topology are discussed and the topology's(More)
This paper presents an event-driven algorithm and its symbolic implementation for the analysis of power and ground bus networks. The algorithm uses frequency domain techniques and moment matching approaches based on Pad e approximants to estimate the transfer function at each node in the PPG network. Afterwards, the transient w aveforms are extracted for(More)
This paper presents the adaptation of a conventional injection molding process to the mass replication of polymeric microstructures with appropriate mold design and process control. Using wet-etched silicon wafers with microstructures on the surfaces as mold inserts, we have successfully predicted, improved and optimized the replication results. The flow(More)
In this paper, two simple AC-DC single-stage PWM full-bridge converters are considered - one current fed, the other voltage fed. The operation of both converters is explained and their properties are noted. Experimental results for both converters obtained from lab prototypes are presented, compared and discussed.
| This paper presents an event-driven algorithm for the symbolic analysis of power and ground bus networks using moment matching techniques to estimate the transfer function at each node in the PPG network. The PPG network is modeled by a hierarchical combination of mesh and tree structures that are composed of a collection of RC-segments and pulldown or(More)
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