@inproceedings{beddingfield_storelli_bhattacharya_2017, title={A novel dual voltage source converter for magnetic material characterization with trapezoidal excitation}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85020117541&partnerID=MN8TOARS}, DOI={10.1109/apec.2017.7930922}, abstractNote={A magnetic core testbed is intended to provide a variety of induction curves to fully characterize a magnetic material. Off the shelf solutions are prohibitively expensive and limited in testing range for research purposes. Mainly, high voltages and/ or currents and the ability to create a variety of induction profiles, beyond sinusoidal, is needed for full core characterization. This paper establishes the need for a novel magnetic core testing apparatus to explore high frequency trapezoidal excitation. Then a solution is presented using a novel dual voltage source converter circuit. The authors validate the topology in simulation and present a laboratory prototype. Specifically, the induction profile seen in many dual active bridges is of immediate interest and generated with this approach.}, booktitle={2017 thirty second annual ieee applied power electronics conference and exposition (apec)}, author={Beddingfield, R. and Storelli, D. and Bhattacharya, S.}, year={2017}, pages={1659–1666} }
 @inproceedings{beddingfield_storelli_bhattacharya_2017, title={Active elimination of DC bias flux in series DC active filter coupling transformer}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85020036855&partnerID=MN8TOARS}, DOI={10.1109/apec.2017.7930897}, abstractNote={The Medium-voltage DC amplifier is a thyristor based power converter with a series DC active filter that provides a highly controllable and responsive platform to establish a high power dc bus. Having bulk power flow through the thyristor converter offers an economical and high power density solution over PWM converters. By designing the system to meet standards requested by the US Navy for the Next Generation Intelligent Power System, this paper will show a platform applicable to many high power DC microgrid fields. In particular, there are promising applications in mobile mining equipment, electric aircraft and ships. This paper proposes a novel control technique to actively mitigate the DC flux that is generated by the load current. This control approach yields significant reductions in the core volume and required transformer turns. The proposed solutions will be evaluated in a 4 kVA 400 VDC laboratory scale test-bed.}, booktitle={2017 thirty second annual ieee applied power electronics conference and exposition (apec)}, author={Beddingfield, R. and Storelli, D. and Bhattacharya, S.}, year={2017}, pages={1498–1505} }