1. Y. Prabowo, V. M. Iyer, A. Agarwal, S. Bhattacharya and E. Aeloiza, "Modular Hybrid Transformers Toward Grid Resilience: Efficiency Analysis and Operation," in IEEE Transactions on Industrial Electronics, 2024, doi: 10.1109/TIE.2023.3340215.  

2. S. Sharma, V. M. Iyer and S. Bhattacharya "A Distributed Control Method With Seamless Hot Swap Capability for Generic DC Microgrids," in IEEE Transactions on Industrial Electronics, 2023, doi: 10.1109/TIE.2023.3317835. 

3. S. Gulur, V. M. Iyer and S. Bhattacharya, “Passive CM Filter Configuration for a Multi-Stage Grid-Tied Solid State Transformer,” in IEEE Journal of Emerging and Selected Topics in Industrial Electronics, vol. 4, no. 3, pp. 710-717, July 2023, doi: 10.1109/JESTIE.2023.3268623. 

4. S. Sharma, V. M. Iyer, S. Bhattacharya and K. Zou, "New Mesh Configurations with Decentralized Droop Control Method for DC Microgrids," in IEEE Transactions on Industrial Electronics, 2023, doi: 10.1109/TIE.2023.3245220.

5. S. Sharma, V. M. Iyer, S. Bhattacharya, K. Zou and J. Kikuchi, "Droop Based Distributed Secondary Control Method with Reduced Communication Complexity for Radial DC Microgrids," in IEEE Journal of Emerging and Selected Topics in Industrial Electronics, 2023, doi: 10.1109/JESTIE.2023.3246932.

6. S. Sharma, V. M. Iyer and S. Bhattacharya, "An Optimized Non-Linear Droop Control Method Using Load Profile for DC Microgrids," in IEEE Journal of Emerging and Selected Topics in Industrial Electronics, vol. 4, no. 1, pp. 3-13, Jan. 2023, doi: 10.1109/JESTIE.2022.3208513. 

7. V. M. Iyer, S. Gulur, S. Bhattacharya, J. Kikuchi, S. Sridharan, K. Zou and C. Chen “An active voltage stabilizer for a DC microgrid system” in IEEE Access, vol. 9, pp. 86786-86800, 2021, doi: 10.1109/ACCESS.2021.3087543.  

8. S. Gulur, V. M. Iyer and S. Bhattacharya, “A CM filter configuration for grid-tied voltage source converters,” in IEEE Transactions on Industrial Electronics, vol. 67, no. 10, pp. 8100-8111, Oct. 2020, doi: 10.1109/TIE.2019.2949530.

9. V. M. Iyer, S. Gulur, G. Gohil and S. Bhattacharya, “An approach towards extreme fast charging station power delivery for electric vehicles with partial power processing,” in IEEE Transactions on Industrial Electronics, vol. 67, no. 10, pp. 8076-8087, Oct. 2020, doi: 10.1109/TIE.2019.2945264. 

10. S. S. Shah, V. M. Iyer and S. Bhattacharya, “Exact solution of ZVS boundaries and AC currents in dual active bridge type DC-DC converters,” in IEEE Transactions on Power Electronics, vol. 34, no. 6, pp. 5043-5047, June 2019, doi: 10.1109/TPEL.2018.2884294. 

11. S. Gulur, V. M. Iyer and S. Bhattacharya, “A dual loop current control structure with improved disturbance rejection for grid connected converters,” in IEEE Transactions on Power Electronics, vol. 34, no. 10, pp. 10233-10244, Oct. 2019, doi: 10.1109/TPEL.2019.2891686. 

12. V. M. Iyer, S. Gulur and S. Bhattacharya, “Small-signal stability assessment and active stabilization of a bidirectional battery charger,” in IEEE Transactions on Industry Applications, vol. 55, no. 1, pp. 563-574, Jan.-Feb. 2019, doi: 10.1109/TIA.2018.2871101.

13. A. De, A. Morgan, V. M. Iyer, H. Ke, X. Zhao, K. Vechalapu, S. Bhattacharya, D. C. Hopkins,“Design, package and hardware verification of a high voltage current switch,” in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 6, no. 1, pp. 441-450, March 2018, doi: 10.1109/JESTPE.2017.2727051. 

14. V. M. Iyer, V. John, “Low-frequency DC bus ripple cancellation in single phase pulse-width modulation inverters,” in Power Electronics, IET, vol.8, no.4, pp.497-506, April 2015, doi: 10.1049/iet-pel.2014.0320 

1. H.B. Sandhibigraha and V. M. Iyer, “Wide Output Range Soft-Switched Single-Stage Dual Active Bridge Type AC-DC Boost PFC Converter,” 2024 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2024.

2. A. A. Dar and V. M. Iyer, “A Relook at the ZVS of Power MOSFETs and an Improved Modeling Approach for ZVS Analysis in Power Converters,” 2024 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2024. 

3. N. Rajput, H.B. Sandhibigraha and V. M. Iyer, “High-Frequency Transformer Design and Loss Modelling for a Multiport Battery Charger Application,” 2024 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2024. 

4. N. Rajput and V. M. Iyer, “A Multilevel Converter Testbench for Characterization of High-Frequency Magnetics for Power Electronics Applications,” 2024 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2024. [Best Presentation Award]

5. H.B. Sandhibigraha, M. Palmal and V. M. Iyer, “Impact of Current Controller Design on the Current Zero Crossing Distortion in an Isolated Active Clamp Boost PFC Converter,” IEEE International Conference on Power Electronics, Drives and Energy Systems, 2022. 

6. V.  R. Kudaravalli, V. Uttam and V. M. Iyer, “A Design Methodology for Triple Active Bridge DC-DC Converter,” IEEE International Conference on Power Electronics, Drives and Energy Systems, Jaipur, India, 2022. 

7. S. P. Rajawat, N. Rajput and V. M. Iyer, “A Comparative Study of Ferrite and Powder Iron Core Filter Inductor Designs in Power Converters for Unified Battery Charging Applications,” IEEE International Conference on Power Electronics, Drives and Energy Systems, Jaipur, India, 2022.  

8. H.B. Sandhibigraha, M. Palmal, S. P. Rajawat, G. Gurrala and V. M. Iyer, “A Multi-port Isolated Active Clamp Boost PFC-Converter-based Charger for Electric Vehicles,” IEEE International Conference on Power Electronics, Drives and Energy Systems, Jaipur, India, 2022. 

9. H.B. Sandhibigraha, M. Palmal and V. M. Iyer, “Modeling and Control Considerations of an Isolated Active Clamp Boost PFC Converter,” IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, 2022. 

10. V. Uttam, V.  R. Kudaravalli and V. M. Iyer, “Improved Harmonic Small-Signal Model for Triple Active Bridge DC-DC Converter,” IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, 2022. 

11. S. Gulur, V. M. Iyer and S. Bhattacharya, “Performance Limits of Integrated Single-Stage AC Filters for Grid-Tied Voltage Source Converters,” IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, 2022. 

12. V. Uttam and V. M. Iyer, “A Unified Modeling Approach for Multi-Port Active-Bridge Converters,” IEEE Energy Conversion Congress and Exposition – Asia (ECCE-Asia 2022), Himeji, Japan, 2022. 

13. S. Sharma, V. M. Iyer, S. Bhattacharya, J. Kikuchi and K. Zou, "Tertiary Control Method for Droop Controlled DC-DC converters to Ensure Bounded Voltages in DC Microgrids," 2021 IEEE Energy Conversion Congress and Exposition (ECCE), Vancouver, Canada, 2021.

14. S. Sharma, V. M. Iyer and S. Bhattacharya, "A Load Profile Based Optimized Piecewise Droop Control for DC Microgrids," 2021 IEEE Fourth International Conference on DC Microgrids (ICDCM), 2021, pp. 1-7.

15. S. Sharma, V. M. Iyer, P. P. Das and S. Bhattacharya, "A Modified Droop Control Algorithm for DC Microgrids to Achieve Accurate Current Sharing and Improved Voltage Regulation," 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), 2021, pp. 119-125.

16. Y. Prabowo, V. M. Iyer, S. Bhattacharya and E. Aeloiza, "Controller Design for the Rating-Proportional Current Sharing in Modular Hybrid Critical Load Substation Transformers," 2021 IEEE 12th Energy Conversion Congress & Exposition - Asia (ECCE-Asia), 2021, pp. 899-905.

17. S. Sharma, V. M. Iyer and S. Bhattacharya, “A Methodology for Seamless Hot Swap of Converters in DC Microgrids,” 46th Annual Conference of the IEEE Industrial Electronics Society (IECON 2020), Singapore, 2020. 

18. V. M. Iyer, S. Gulur and S. Bhattacharya, “An Active Damping Control Strategy for a Multi-Cell AC-DC Solid State Transformer,” 2020 IEEE Energy Conversion Congress andExposition (ECCE), Detroit, MI, USA, 2020. 

19. Y. Prabowo, V. M. Iyer, S. Bhattacharya and E. Aeloiza, “A Control Method of Hybrid Transformer enabled Harmonic Isolator for Sensitive Clustered Harmonic Loads,” 2020 IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, 2020. 

20. V. M. Iyer, S. Sharma and S. Bhattacharya, “A Methodology to Select the Number of Cascaded Cells for a Medium Voltage Multilevel AC-DC Solid State Transformer,” 2020 IEEE Transportation Electrification Conference & Expo (ITEC), Chicago, IL, USA, 2020.

21. V. M. Iyer, S. Gulur, S. Bhattacharya, J. Kikuchi, S. Sridharan, K. Zou, C. Chen “An active voltage stabilizer for a generic DC microgrid,” 2019 IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, MD, USA, 2019.

22. V. M. Iyer, S. Gulur, S. Bhattacharya and R. Ramabhadran, “A Partial Power Interface for Battery Energy Storage Integration with a DC Microgrid,” 2019 IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, MD, USA, 2019.

23. A. Agarwal, V. M. Iyer, A. Anurag and S. Bhattacharya, “Adaptive Control of a Hybrid Energy Storage System for Wave Energy Conversion Application,” 2019 IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, MD, USA, 2019.

24. Y. Prabowo, V. M. Iyer, B. Kim and S. Bhattacharya, “Modeling and stability assessment of single-phase droop controlled solid state transformers,” 10th International Conference on Power Electronics – ECCE Asia (ICPE 2019-ECCE Asia), Busan, Korea, 2019.

25. S. Shah, V. M. Iyer and S. Bhattacharya, “An approach to unified full-order modelling of dual active bridge type converters,” 44th Annual Conference of the IEEE Industrial Electronics Society (IECON 2018), Washington D.C., USA, 2018.

26. A. Wiemer, V. M. Iyer, A. Hinz, S. Bhattacharya, R. W. De Doncker, “Small-signal modelling and controller design considerations for Dyna-C AC-DC converter,” 2018 IEEE Energy Conversion Congress and Exposition (ECCE), Portland, OR, USA, 2018.

27. S. Gulur, V. M. Iyer, S. Bhattacharya, “Accurate common mode noise models for three-level T-type neutral point clamped converters,” 2018 IEEE Energy Conversion Congress and Exposition (ECCE), Portland, OR, USA, 2018.

28. V. M. Iyer, S. Gulur, G. Gohil, S. Bhattacharya, “Extreme fast charging station architecture for electric vehicles with partial power processing,” 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), San Antonio, TX, USA, 2018, pp. 659-665.

29. S. Gulur, V. M. Iyer, S. Bhattacharya, “Proportional integral-resonant and dual loop current control structure comparison for grid-connected converters in the rotating frame,” 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), San Antonio, TX, USA, 2018, pp. 1617-1623.

30. S. Gulur, V. M. Iyer, S. Bhattacharya, “Stationary reference frame based current control structure with improved disturbance rejection for grid-connected converters,” 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), San Antonio, TX, USA, 2018, pp. 1031-1035.

31. V. M. Iyer, S. Gulur, S. Bhattacharya, “Small-signal modelling and stability analysis of a bidirectional electric vehicle charger,” in International Conference on Renewable Energy Research and Applications (ICRERA), IEEE, San Diego, CA, USA, 2017, pp. 1030-1035.

32. V. M. Iyer, S. Gulur, S. Bhattacharya, “Variable DC bus control for a bidirectional on-board electric vehicle charger,” in International Conference on Renewable Energy Research and Applications (ICRERA), IEEE, San Diego, CA, USA, 2017, pp. 1041-1046.

33. S. Gulur, V. M. Iyer, S. Bhattacharya, “A dual loop current control structure with improved disturbance rejection for grid-connected converters in the synchronous rotating reference frame,” in Energy Conversion Congress and Exposition (ECCE), IEEE, Cincinnati, OH, USA, 2017, pp. 3890-3896.

34. V. M. Iyer, S. Gulur, S. Bhattacharya, “An optimal design methodology for dual active bridge converter under output voltage variation,” in Transportation Electrification Conference and Expo (ITEC), IEEE, Navy Pier, Chicago, USA, 2017, pp. 413-420.

35. V. M. Iyer, S. Gulur, S. Bhattacharya, “Hybrid control strategy to extend the ZVS range of a dual active bridge converter,” in Applied Power Electronics Conference (APEC), IEEE, Tampa, Florida, USA, 2017, pp. 2035-2042. [Outstanding Presentation Award]

36. A. De, A. Morgan, V. M. Iyer, H. Ke, X. Zhao, K. Vechalapu, S. Bhattacharya, D. C. Hopkins, “Design, package, and hardware verification of a high voltage current switch,” in Applied Power Electronics Conference (APEC), IEEE, Long Beach, California, USA, 2016, pp. 295-302.

37. V. M. Iyer, S. Prabhakaran, P. Vijayan, “High frequency high current transformer designs for silicon carbide based LLC converters,” in Energy Conversion Congress and Exposition (ECCE), IEEE, Montreal, Canada, 2015, pp. 5650-5656.

Granted Patents

1. R. Datta, V. M. Iyer, M. Osama, K. Huh, V. Rallabandi, “Electric Power System for a Vehicle,” US11325714B2, issued May 10, 2022.

2. P. Vijayan, R. Naik, A. K. Raghunathan, V. M. Iyer, “Contact-less power transfer system and method for controlling the same,” US11303156B2, issued April 12, 2022.

3. P. Vijayan, S. Ramachandrapanicker, D. Aravind, A. K. Raghunathan, V. M. Iyer, “System and method for charging receiver devices,” US10897153B2, issued Jan 19, 2021.

4. P. Vijayan, S. Prabhakaran, J. O. Collins, V. M. Iyer, “A system and method for fault ride through,” US10476264B2, issued Nov 12, 2019.

5. P. Vijayan, V. M. Iyer, “DC converters with modified droop control and method of use,” US10097095B2, issued Oct 9, 2018

Pending Applications

6. R. Datta, V. M. Iyer, M. Osama, K. Huh, V. Rallabandi, “Electric Power System for a Vehicle,” US20230356849A1, filed Jul 17, 2023.

7. V. M. Iyer and H.B. Sandhibigraha, “System and Method for Converting Alternating Current (AC) to Direct Current (DC),” IN202341080811, filed 28 Nov 2023.

8. V. M. Iyer and N. Rajput, “Testing Apparatus for Power Magnetics and Method for using the same,” IN202341084728, filed 12 Dec 2023.