@inproceedings{beddingfield_de_mirzae_bhattacharya_2015, title={Design methodology of series DC coupling transformer in a medium-voltage DC amplifier system}, volume={2015-May}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84937857830&partnerID=MN8TOARS}, DOI={10.1109/apec.2015.7104350}, abstractNote={The medium-voltage dc amplifier is a controllable dc source for the purpose of testing medium-voltage dc system technologies for shipboard applications. In a medium-voltage dc amplifier system, a dc active filter with a series dc coupling transformer is an integral component of the system required for both steady-state and dynamic voltage injection. This paper describes the design aspects and methodology for the series dc coupling transformer in such a system. The design of the transformer is one of the most critical aspects of this system as it has to withstand large continuous dc current offset without saturating. Based on system performance requirements, design criteria for the transformer is defined and two transformer designs based on two Iron-based magnetic materials are evaluated for a 12 kVA, 300 Vdc laboratory-scale amplifier test bed. An optimal design methodology is also proposed in this paper. Various design compromises have been studied and reported. The practical transformer design considerations and feasibility study for a medium-voltage dc amplifier system are given.}, number={May}, booktitle={2015 thirtieth annual ieee applied power electronics conference and exposition (apec 2015)}, author={Beddingfield, R. and De, A. K. and Mirzae, H. and Bhattacharya, S.}, year={2015}, pages={183–190} }
 @inproceedings{beddingfield_davis_mirzaee_bhattacharya_2015, title={Investigation of series DC active filter and hybrid AC active filter performance in medium voltage DC amplfier}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84945919142&partnerID=MN8TOARS}, DOI={10.1109/ests.2015.7157880}, abstractNote={To further improve energy management, the US navy is exploring medium-voltage DC as the power supply of choice for next generation integrated power systems (NGIPS). Using the mature technology of multi-pulse thyristor bridge rectifiers, viable topologies are proposed that meet power density expectations. However, due to the non-linear ripple associated with thyristor commutations in such active front-ends (AFEs), a high bandwidth series AC active filter is used to smooth out the current harmonics. Similarly, a high bandwidth hybrid DC active filter is used for DC bus smoothing and improved dynamic performance. This paper will investigate the combined performance and consequential interactions of both active filters.}, booktitle={2015 IEEE Electric Ship Technologies Symposium (ESTS)}, author={Beddingfield, R. and Davis, A. and Mirzaee, H. and Bhattacharya, S.}, year={2015}, pages={161–166} }
 @article{mirzaee_de_tripathi_bhattacharya_2014, title={Design Comparison of High-Power Medium-Voltage Converters Based on a 6.5-kV Si-IGBT/Si-PiN Diode, a 6.5-kV Si-IGBT/SiC-JBS Diode, and a 10-kV SiC-MOSPET/SiC-JBS Diode}, volume={50}, ISSN={["1939-9367"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84904684358&partnerID=MN8TOARS}, DOI={10.1109/tia.2014.2301865}, abstractNote={In this paper, a comparative design study of high-power medium-voltage three-level neutral-point-clamped converters with a 6.5-kV Si-IGBT/Si-PiN diode, a 6.5-kV Si-IGBT/SiC-JBS diode, and a 10-kV SiC-MOSFET/SiC-JBS diode is presented. A circuit model of a 100-A power module, including packaging parasitic inductances, is developed based on device die SPICE-based circuit models for each power device. Switching waveforms, characteristics, and switching power and energy loss measurements of the power modules, including symmetric/asymmetric parasitic inductances, are presented. High-power converter designs and SPICE circuit simulations are carried out, and power loss and efficiencies are compared for a pulsewidth-modulated (PMW) 1-MW power converter at 1-, 5-, and 10-kHz switching frequencies for application in shipboard power system and a PWM vector-controlled and a line-frequency angle-controlled 20- to 40-MVA power converter at 60-Hz, 540-Hz, and 1-kHz switching frequencies for active mobile substation application. It is shown that the 6.5-kV Si-IGBT incorporating an antiparallel SiC-JBS diode, with its high efficiency performance up to 5-kHz switching frequency, is a strong candidate for megawatt-range power converters. The 10-kV SiC-MOSFET/SiC-JBS diode remains an option for higher switching frequency (5-10 kHz) high-power converters.}, number={4}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Mirzaee, Hesam and De, Ankan and Tripathi, Awneesh and Bhattacharya, Subhashish}, year={2014}, pages={2728–2740} }
 @inproceedings{mirzaee_bhattacharya_bala_2013, title={A multi-loop control system for series DC active filter in a medium-voltage DC amplifier}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84891093183&partnerID=MN8TOARS}, DOI={10.1109/ecce.2013.6647403}, abstractNote={In order to cope with increasing power demand onboard future combatant ships, US navy has embarked on medium-voltage dc as the next generation integrated power system. A viable dc power supply system solution for such ships is based on the mature technology of multi-pulse thyristor bridge front-end rectifiers. Due to the intrinsic ripple characteristic associated with thyristor commutations in such front-ends, a high bandwidth series dc active filter can be used to smooth out the dc-bus. In this paper, we propose a new multi-loop feedback and feed-forward control system for the series dc active filter in order to meet the stringent dc-bus ripple attenuation and disturbance rejection requirements. Analysis and simulations results show promise of multi-loop control scheme. Experimental results of the 12kVA/400Vdc laboratory test-bed with feed-forward control are provided.}, booktitle={2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013}, author={Mirzaee, H. and Bhattacharya, Subhashish and Bala, S.}, year={2013}, pages={5193–5198} }
 @inproceedings{mirzaee_beddingfield_bhattacharya_parkhideh_2013, title={Performance investigation of hybrid converter systems for mobile mining applications}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84891046405&partnerID=MN8TOARS}, DOI={10.1109/ecce.2013.6646788}, abstractNote={To supply the AC high power drive systems, several Active Front-Ends (AFEs) with DC choppers are currently used to ensure reliable operation and an acceptable harmonic current spectrum. Recently, integration of the energy storage system with the mining equipment as an example of large mobile multimotor applications has received industry attention, especially for peak load shaving and energy management of the mines. Currently, the regenerative energy is often burnt into the choppers. The industry is motivated to capture this regenerative energy since it can be as high as 60% of the motoring power, as high as 3MJ in every operation cycle and 24 MW peak power. Hybrid approach for the front-end converter system has shown a technology path to deploy on-board energy storage without sacrificing the efficiency and reliability of the entire system. This paper addresses the dynamic performance analysis of such systems through detailed simulation and laboratory scale experiments.}, booktitle={2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013}, author={Mirzaee, H. and Beddingfield, R. and Bhattacharya, Subhashish and Parkhideh, B.}, year={2013}, pages={825–831} }
 @article{parkhideh_mirzaee_bhattacharya_2013, title={Supplementary Energy Storage and Hybrid Front-End Converters for High-Power Mobile Mining Equipment}, volume={49}, ISSN={["1939-9367"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84880876687&partnerID=MN8TOARS}, DOI={10.1109/tia.2013.2257637}, abstractNote={To supply the high-power ac-drive systems of the mining equipment, several active front ends with dc choppers are used to ensure reliable operation and an acceptable harmonic current spectrum. Recently, the integration of the energy storage system with the mining equipment has received industry attention, particularly for peak load shaving and smarter energy management of the mines. Currently, the regenerative energy is often burned into the choppers and is not fed back to the grid. The industry is motivated to capture this regenerative energy since it can be as high as 60% of the motoring power, as high as 3 MJ in every operation cycle, and as high as 24-MW peak power. Therefore, there is a possibility of large cost reductions and component rating reduction. In this paper, we investigate the operation of the current state-of-the-art front-end converter systems for multimotor applications. In particular, we propose power conversion configurations and methodology to determine the suitable energy storage technology for the development of the multimotor mobile mining equipment that has encouraging incentives for both the manufacturers and the mine operators.}, number={4}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Parkhideh, Babak and Mirzaee, Hesam and Bhattacharya, Subhashish}, year={2013}, pages={1863–1872} }
 @inproceedings{tripathi_hatua_mirzaee_bhattacharya_2012, title={A three-phase three winding topology for dual active bridge and its D-Q mode control}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84860132779&partnerID=MN8TOARS}, DOI={10.1109/apec.2012.6165998}, abstractNote={A new Dual Active Bridge (DAB) topology is proposed with a 15-kV SiC-IGBT based three-level inverter at the high-voltage side and 1200-V SiC-MOSFET based paralleled two-level inverter at the low-voltage side. The proposed DAB is an integral part of a solid state transformer which connects a 13.8-kV distribution grid and a 480-V utility grid. The three-level inverter connected at the high-voltage side and a pair of two-level inverters connected at the low-voltage sides (in Y/Δ) of the high frequency link transformer help to reduce dominant harmonic currents. Thus harmonic-free currents in the high frequency link transformer are achieved without pulse-width modulation. A simple control is proposed and validated with simulation results.}, booktitle={Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC}, author={Tripathi, A.K. and Hatua, K. and Mirzaee, H. and Bhattacharya, Subhashish}, year={2012}, pages={1368–1372} }
 @inproceedings{mirzaee_bhattachary_bala_2012, title={Design issues in a medium-voltage DC amplifier with a multi-pulse thyristor bridge front-end}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84870881833&partnerID=MN8TOARS}, DOI={10.1109/ecce.2012.6342766}, abstractNote={In this paper the design issues of a medium-voltage DC amplifier with a multi-pulse thyristor bridge front-end are presented. A medium voltage dc amplifier is needed in de-risking new technologies coming onboard future electric ships. Based on the required system dynamic specifications, an initial design reveals the problems with a multi-pulse thyristor front-end, and then provides a novel solution to meet the requirements, are presented. The proposed system solution is validated through both simulation and experimental results.}, booktitle={2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012}, author={Mirzaee, H. and Bhattachary, S. and Bala, S.}, year={2012}, pages={603–609} }
 @inproceedings{parkhideh_mirzaee_bhattacharya_2012, title={Hybrid front end converters for large multi-motor applications integrated with energy storage}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84860116590&partnerID=MN8TOARS}, DOI={10.1109/apec.2012.6165881}, abstractNote={To supply the AC drive systems several Active Front Ends (AFE) with DC choppers are used to insure a reliable and acceptable harmonic current spectrum operation. Recently, energy storage system integration with the mining equipment has received industry attention, especially for peak load shaving and smarter energy management of the mine. Currently, the regenerative energy is often burnt into the choppers and is not fed back to the grid. The industry is motivated to capture this regenerative power since it can be as high as 60% of the motoring power and as high as 24 MW. Therefore, there is a possibility of large cost reduction and component downsizing. However, present status of development seems not to be very promising mainly because energy storage systems, (such as ultracapacitors) are still considered as an add-on part to existing products. In this paper, we investigate the operation of the current state-of-the-art front end converter systems for multi-motor applications. In particular, we propose power conversion configurations and methodology to determine the suitable energy storage technology for development of the multi-motor mobile mining equipment that has encouraging incentives for both the manufacturer and the mine operator.}, booktitle={Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC}, author={Parkhideh, B. and Mirzaee, H. and Bhattacharya, Subhashish}, year={2012}, pages={607–614} }
 @inproceedings{mirzaee_bhattacharya_bala_2011, title={A high power medium-voltage DC amplifier system}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-81855161389&partnerID=MN8TOARS}, DOI={10.1109/ecce.2011.6064319}, abstractNote={In this paper the concept of a medium-voltage dc amplifier system is proposed. The dc amplifier system must provide a medium-voltage dc bus with the possibility of superposing a high bandwidth time-varying signal and should be capable of producing voltage excursions at a high slew-rate. This is intended to facilitate the development of new technologies, i.e. new high power non-linear loads based on power electronics, in all electric ships as part of the newly proposed MVDC ship power system. This paper sets forth the set of parameters and specifications of the medium-voltage dc amplifier system and proposes a specific circuit topology to achieve the required characteristics. Simulation results verify the feasibility and demonstrate highly dynamic performance of the proposed system configuration.}, booktitle={IEEE Energy Conversion Congress and Exposition: Energy Conversion Innovation for a Clean Energy Future, ECCE 2011, Proceedings}, author={Mirzaee, H. and Bhattacharya, Subhashish and Bala, S.}, year={2011}, pages={4043–4050} }
 @inproceedings{mirzaee_de_tripathi_bhattacharya_2011, title={Design comparison of high power medium-voltage converters based on 6.5kV Si-IGBT/Si-PiN diode, 6.5kV Si-IGBT/SiC-JBS diode, and 10kV SiC MOSFET/SiC-JBS diode}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-81855217441&partnerID=MN8TOARS}, DOI={10.1109/ecce.2011.6064090}, abstractNote={In this paper a comparative design study of high power medium-voltage three-level NPC converter with 6.5kV Si-IGBT/Si-PIN diode, 6.5kV Si-IGBT/SiC-JBS diode, and 10kV SiC-MOSFET/SiC-JBS diode is presented. Power module circuit models including packaging parasitic inductances are created based on accurate device die SPICE circuit models for each (a) 6.5kV Si-IGBT/PiN diode; (b) 6.5kV Si-IGBT/SiC-JBS diode; and (c) 10kV SiC-MOSFET/SiC-JBS diode. Switching waveforms, characteristics, switching power and energy loss measurements of power modules including symmetric/asymmetric parasitic inductances are followed by SPICE circuit simulation and efficiency comparison of a 1MW 3L-NPC converter at 1kHz, 5kHz, and 10kHz switching frequencies. It is shown that 6.5kV Si-IGBT incorporating an anti-parallel SiC-JBS diode, with its high efficiency performance up to 5kHz, is a strong candidate for MW range converters. The 10kV SiC-MOSFET/SiC-JBS diode remains an option for higher switching frequency high power converters.}, booktitle={IEEE Energy Conversion Congress and Exposition: Energy Conversion Innovation for a Clean Energy Future, ECCE 2011, Proceedings}, author={Mirzaee, H. and De, A. and Tripathi, A. and Bhattacharya, Subhashish}, year={2011}, pages={2421–2428} }