Santanu Kapat. Research at GE Global Research: Low frequency modeling of wind turbine and control of wind farm management systems

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1 1 P a g e Santanu Kapat Assistant Professor, Department of Electrical Engineering, Indian Institute of Technology (IIT) Kharagpur, Kharagpur , West Bengal, India skapat@ee.iitkgp.ernet.in, Phone (O): sn.kapat@gmail.com Webpage: Find a purpose in life so big it will challenge every capacity to be at your best, David O. McKay PROFESSIONAL EXPERIENCE [1] Aug present: Assistant Professor, Dept. of Electrical Engg., IIT Kharagpur, India Research at IIT Kharagpur: Digital and nonlinear control in Switched mode power supply and applications to DVS-enabled systems, LED drivers, DC grid [2] Aug Aug. 2011: Research Engineer, GE Global Research, Bangalore, India Research at GE Global Research: Low frequency modeling of wind turbine and control of wind farm management systems [3] Aug Jul. 2010: Visiting Scholar: Dept. of ECE., University of Illinois at Urbana-Champaign, USA Research at UIUC: Time optimal control in DC-DC converters and methods of augmentation for ultra-fast transient performance: Mentor: Prof. Philip Krein EDUCATION Ph.D. Electrical Engineering IIT Kharagpur 2010 PhD thesis topic: ``Control methods for improving the performance of DC-DC converters : Thesis advisors: Prof. Amit Patra and Prof. Soumitro Banerjee M.Tech. Electrical Engineering IIT Kharagpur 2006 Specialization: Control System Engineering B.E. Instrumentation Technology VTU, Belgaum 2003 AWARDS AND DISTINCTIONS 2016 INSA Medal for Young Scientist, Indian National Science Academy 2016 INAE Young Engineering Award, Indian National Academy of Engineering 2016 Senior Member, IEEE 2015 Associate Editor, IEEE Transactions on Power Electronics 2014 Young Scientist Research Award, BRNS, Department of Atomic Energy MAJOR RESEARCH AREAS Digital control, nonlinear control, and embedded control systems Switched Mode Power Converters and digital control - Modeling, nonlinear analysis, and design GaN-based high-frequency, high performance, energy-efficient, EMI-aware digital power management architectures Applications Areas: Switched mode power supply for dynamic power management for DVS-enables single/multi-core processors, IoT;, Digital power management for LED drivers, fast Battery charging/discharging, PM Bus, 48V DC nanogrid, solar-wind residential hybrid power with storage; GaN-based hi-frequency power electronics converters for telecom, data center, and electric vehicle. 1 P a g e

2 2 P a g e MAJOR RESEARCH AND DEVELOPMENT 2014 Developed state-of-the-art Embedded Power Management Lab first of its kind in India 2015 Introduced a course Embedded Control of Switching Power Converters Embedded Power Management Lab, Department of Electrical Engineering, IIT Kharagpur, India COURSES TAUGTH at IIT Kharagpur [1] Electrical Technology (UG first year) currently teaching Autumn 2017 [2] Industrial Automation and Control (PG/UG level) Taught in Spring 2017 [3] Nonlinear Control (PG-level) Taught in Spring 2012, 2013, and 2014 [4] Digital Control (PG-level) Taught in Autumn 2014, 2015, and 2016 [5] Embedded Control of Switching Power Converters (PG-level) Taught in Spring 2015, 2016 [6] Programmable and Embedded System (PG-level) - Taught in Autumn 2012, 2013, and 2014 [7] Embedded Systems (UG-level) Taught in Spring 2014 [8] Control System Design (UG-level sessional course) Taught in Autumn 2011, 2012, and 2013 RESEARCH PUBLICATIONS ACCEPTED/PUBLISHED JOURNAL PUBLICATION [1] S. Kapat and I. Kumar, "Single-Inductor Multi-Output Level Buck Converter for Reducing Voltage-Transition Time and Energy Overheads in Low Power DVS-Enabled Systems," Early access, IEEE Trans. Power Electron., [2] I. Kumar and S. Kapat, Power Management Architectures for Dynamic Voltage Scaling (DVS) Applications Challenges and Opportunities," Annals of the Indian National Academy of Engineering, vol. XIV, pp , April 2017 (invited paper). [3] S. Kapat, "Parameter-Insensitive Mixed-Signal Hysteresis-Band Current Control for Point-of-Load Converters with Fixed Frequency and Robust Stability, IEEE Trans. Power Electron [4] A. K. Singha and S. Kapat, "A Unified Framework for Analysis and Design of a Digitally Current-Mode Controlled Buck Converter, Early access, IEEE Trans. Cir. Syst. I, vol. 63, no. 11, pp , Nov [5] I. Kumar and S. Kapat, "Unified Digital Current Mode Control Tuning with Near Optimal Recovery in a CCM Buck Converter," IEEE Trans. Power Electron., vol. 31, No. 12, pp , December P a g e

3 3 P a g e [6] S. Kapat, "Reconfigurable Periodic Bi-frequency DPWM with Custom Harmonic Reduction in DC-DC Converters,", IEEE Trans. Power Electron.,, vol. 31, No. 4, pp , April [7] S. Kapat, B. C. Mandi, and A. Patra, "Voltage-mode Digital Pulse Skipping Control of a DC-DC Converter with Stable Periodic Behavior and Improved Light-load Efficiency," IEEE Trans. Power Electron., vol. 31, No. 4, pp , April [8] S. Kapat, "Configurable Multi-mode Digital Control for Light Load DC-DC Converters with Improved Spectrum and Smooth Transition," IEEE Trans. Power Electron., vol. 31, No. 3, pp , March [9] A. K. Singha, S. Kapat, S. Banerjee, and J. Pal, "Nonlinear Analysis of Discretization Effects in a Digital Current Mode Controlled Boost Converter," IEEE J. Emerg. Selected Topics Cir. Systs., vol. 5, No. 3, pp , September [10] S. Kapat, "Selectively Sampled Sub-harmonic Free Digital Current Mode Control Using Direct Duty Control", IEEE Trans. Cir. Syst. II, vol. 62, No. 3, pp , March [11] S. Kapat, P. Shenoy, and P. Krein, "Near Null Response to Large Signal Transients in an Augmented Buck Converter: A Geometric Approach" IEEE Trans. Power Electron., vol. 27, No. 7, pp , July [12] S. Kapat and P. Krein, "Formulation of PID Control for DC-DC Converters Based on Capacitor Current: A Geometric Context", IEEE Trans. Power Electron., vol. 27, No. 3, pp , March [13] S. Kapat and P. Krein, "Improved Time Optimal Control of a Buck Converter Based on Capacitor Current", IEEE Trans. Power Electron., vol. 27, No. 3, pp , March [14] S. Kapat, S. Banerjee, and A. Patra, "One-dimensional Discontinuous Map Analysis of DC-DC Converters Under Voltage Controlled Pulse Skipping Modulation", Int. J. Bifur. Chaos, World Scientific Journal, vol. 22, No. 3, March [15] S. Kapat, A. Patra, and S. Banerjee, "Improving Load Regulation in Current Mode Control through Inductor Current Filtering", Int. J. Power Electron., Vol. 4, No. 1, pp , January [16] S. Kapat, A. Patra, and S. Banerjee, "Achieving Monotonic Variation of Spectral Composition in DC-DC Converters using Pulse Skipping Modulation", IEEE Trans. Cir. Syst. I, vol. 58, No. 8, pp , August [17] S. Kapat, S. Banerjee, and A. Patra, "Discontinuous Map Analysis of a DC-DC Converter Governed by a Pulse Skipping Modulation", IEEE Trans. Cir. Syst. I, vol. 57, no. 7, pp , July [18] S. Kapat, A. Patra, and S. Banerjee, "A Current Controlled Tri-State Boost Converter with Improved Performance through RHP Zero Elimination", IEEE Trans. Power Electron., vol. 24, no. 3, pp , March JOURNAL PAPERS UNDER SUBMISSION/REVISION [19] A. K. Singha and S. Kapat, Analysis and Design of Stable Digital Current-Mode Control in a Boost Converter with Fast Response, submitted after revision, IEEE Trans. Cir. Syst. I, [20] B. C. Mandi, S. Kapat, A. Patra, Unified Digital Modulation Techniques for DC-DC Converters over a Wide Operating Range: Implementation, Modeling, and Design Guidelines, under major revision, IEEE Trans. Cir. Syst. I, [21] K. Hariharan and S. Kapat, Need for Variable Frequency Control in Power Management Converters Challenges and Opportunities using Digital Implementation, submitted, Proc. of the Indian National Science Academy, 2017 (invited paper). 3 P a g e

4 4 P a g e ACCEPTED/PUBLISHED CONFERENCE PUBLICATION [1] A. Singha and S. Kapat, ``A Robust Design Framework for Stable Digital Peak Current-Mode Control Under Uniform Sampling, in Proc. IEEE ECCE, Milwaukee, USA, September 18-22, [2] A. Mandal, I. Kumar, and S. Kapat, "Multi-Band Mixed-Signal Hysteresis Current Control for EMI Reduction in Switch-Mode Power Supplies," IEEE APEC, Long Beach, CA, USA, March [3] K. Hariharan, S. Kapat, and S. Mukhopadhyay, "Unified Constant on/off-time Hybrid Compensation for Fast Recovery in Digitally Current-Mode Controlled Point-of-Load Converters," IEEE APEC, Long Beach, CA, USA, March [4] I. Kumar and S. Kapat, "Mixed-Signal Hysteretic Internal Model Control of Buck Converters for Ultra-Fast Envelop Tracking," IEEE APEC, Long Beach, CA, USA, March [5] B. Mandi, S. Kapat, and A. Patra, "Fractional Pulse Skipping in Digitally Controlled DC-DC Converters for Improved Light-Load Efficiency and Power Spectrum," IEEE APEC, Long Beach, CA, USA, March [6] S. Kapat, "Beyond Time Optimal Performance Using SIMO DC-DC Converters in Dynamic Voltage Scaling," in Proc.IEEE APEC, Charlotte, NC, USA, March [7] S. Kapat, "Reconfigurable Bi-Frequency DPWM with Custom Spectral Shaping in a Synchronous Buck Converter," in Proc. IEEE APEC, Charlotte, NC, USA, March [8] S. Kapat, "Voltage-Mode Digital Pulse Train Control for Light Load DC-DC Converters with Spread Spectrum," in Proc. IEEE APEC, Charlotte, NC, USA, March [9] S. Kapat, "Analysis and Synthesis of Reconfigurable Digital Pulse Train Control in a DCM Buck Converter," in Proc.IEEE IECON, Dallas, TX, USA, Oct./Nov., [10] S. Kapat "Near Time Optimal PID Tuning in a Digitally Controlled Synchronous Buck Converter," in Proc. IEEE COMPEL, Santander, Spain, June [11] S. Kapat and K. Hariharan, "Enhanced Large-signal Stability and Performance in Digital PID Control in a DC-DC Boost Converter," in Proc. IEEE COMPEL, Santander, Spain, June [12] I. Kumar and S. Kapat, "Geometric Control Breaks Tracking Performance Limits Using Linear Control in a Buck Converter," in Proc. IEEE COMPEL, Santander, Spain, June [13] S. Kapat et al., "Embedded Reconfigurable Augmented DC-DC Boost Converter for Fast Transient Recovery," in Proc. IEEE VLSI Design, Pune, India, January [14] T. J. Neyens, P. S. Shenoy, S. Kapat, and P. T. Krein, "Implementation of an augmented boost converter for improved load transient response," in Proc. IEEE PECI, Illinois USA, February [15] P. Shenoy, P. Krein, and S. Kapat, "Beyond Time-Optimality: Energy-Based Control of Augmented Buck Converters for Near Ideal Load Transient Response," in Proc. IEEE APEC, Fort Worth, TX, USA, March [16] O. Kumar, P. Shenoy, P. Krein, and S. Kapat, "Augmented Boost Converter for Near Null Load Transient Response," in Proc. IEEE PECI, Illinois USA, February [17] S. Kapat and P. Krein, "Formulation of PID Control for DC-DC Converters Based on Capacitor Current: A Geometric Context," in Proc. IEEE COMPEL, pp. 1-6, Boulder, Colorado USA, June P a g e

5 5 P a g e [18] S. Kapat and P. Krein, "PID Controller Tuning in a DC-DC Converter: A Geometric Approach for Minimum Transient Recovery Time," in Proc. IEEE COMPEL, pp. 1-6, Boulder, Colorado USA, June [19] S. Kapat and P. Krein, "Null Response to a Large Signal Transient in an Augmented DC-DC Converter: A Geometric Approach," in Proc. IEEE COMPEL, pp. 1-6, Boulder, Colorado USA, June [20] S. Kapat, S. Banerjee, and A. Patra, "Bifurcation behavior of a boost converter under voltage controlled pulse skipping modulation in the light of 1-D discontinuous map model," in Proc. IEEE ISCAS, pp , Paris, France, May-June 2010 (finalist for the STUDENT BEST PAPER AWARD CONTEST). [21] S. Kapat, A. Patra, and S. Banerjee, "RHP Zero Elimination with Near Optimum Regulation in a Current Controlled Tri-State Boost Converter through Inductor Current Filtering," in Proc. IEEE PECI, pp , Illinois USA, February [22] S. Kapat, S. Banerjee, and A. Patra, "A Voltage Controlled Pulse Skipping Modulation: An Extension towards the Ultra Light Load," in Proc. IEEE ISCAS, pp , Taipei, Taiwan, May [23] S. Kapat, A. Patra, and S. Banerjee, "A Novel Current Controlled Tri-State Boost Converter with Superior Dynamic Performance," in Proc. IEEE ISCAS, pp , Seattle, USA, May [24] S. Kapat, S. Banerjee, and A. Patra, "Modeling and Analysis of DC-DC Converters under Pulse Skipping Modulation," in Proc. IEEE TENCON, pp. 1-6, Hyderabad, India, November PATENT FILED [1] S. Kapat, A. Patra, and S. Banerjee, "Switching Power Converter Adapted for Improved Output Impedance and Load Regulation through Inductor Current Filtering", filed Indian Patent, Application No.: 795/KOL/2009, dt. 26th May, [2] S. Kapat and A. Patra, "Method for Improvement of Light Load Efficiency of a DC-DC Converter by Skipping Pulses through a Voltage Mode Control Loop", filed Indian Patent, Application No.: 957/KOL/2009, dt. 17th July, [3] S. Kapat, A. Patra, and S. Banerjee, "A Fast Response Energy Efficienct Current Control Scheme in a DC-DC Converter with a Freewheeling Switch", filed Indian Patent, Application No.:1766/KOL/2008, dt. 19th October, [4] S. Kapat, " Apparatus Equipped for Reconfiguring DC-DC Converter Augmentation for Ultra-fast Transient Recovery ", provisionally filing Indian Patent [5] S. Kapat and K. Hariharan, " Methods of Formulating and Tuning a Current Mode Controlled DC-DC Boost Converter for High Performance Using Normalized Output Current ", provisionally filed Indian Patent [6] S. Kapat et al., " Reduction in architectural complexity and distributed control formulation for an Energy Optimized DC Nano-grid architecture for Data centre applications ", provisionally filed Indian Patent RESEARCH STUDENT GUIDANCE Ph.D. Student Guidance Sl. No. Student Name Role Joining Year Status 1. Bipin Chandra Mandi Jointly with Prof. A. Patra Autumn 2011 Degree awarded in August Amit Kumar Singha Jointly with Prof. J. Pal Autumn 2012 Degree awarded in August K. Hariharan Jointly with Prof. S. Mukhopadhyay Spring 2013 To complete tentatively by Dec Vedula Inder Kumar Single guidance Autumn 2014 To complete tentatively by Dec P a g e

6 6 P a g e 5. Rabishankar Roy Single guidance Autumn 2015 Yet to present PhD first seminar 6. Somnath Khatua Jointly with Prof. D. Kastha Autumn 2015 Yet to present PhD first seminar M.S. (by research) Student Guidance Sl. No. Student Name Role Joining Year Status 1. Avishek Pal Single guidance Spring 2015 Yet to present PhD first seminar 2. Arnab Acharya Single guidance Spring 2016 Yet to finish course work M.Tech. Student Guidance Completed: EIGHT regular (2 year) M. Tech. students and FIVE dual degree (5-year) M. Tech. students Ongoing: ONE regular (2 year) M. Tech. student DEPARTMENT/INSTITUTE ROLE at IIT Kharagpur (during Aug present) [1] Hosted Prof. Dragan Maksimovic (UC Boulder, USA) and Prof. Gregory Plett (UCCS, USA) and conducted one short term course on ``Power Electronics and Battery Management for Electric-Drivetrain Vehicles during Dec. 12 to 16, [2] Founded the state-of-the-art Embedded Power Management Lab. with the research focus to develop highperformance energy-efficient Digital Power Management Architectures first of its kind in India [3] Introduced a theory course, entitled Embedded Control of Switching Power Converters. This course would highlight recent trends and challenges in digital power management architectures [4] Co-ordinated VLSI summer course during May 2012 [5] Member of research scholar coordinators team, EE Dept. during [6] Departmental examination-in-charge, EE Dept. during 2013 till date [7] Faculty advisor, 4 year B.Tech. students in EE specialization during RESEARCH FUNDING RECEIVED ( ) INSTITUTE FUNDING Project Title Role Duration Amount Status (Lakhs) Reconfigurable Augmentation And Digital Control Of DC-DC Converters PI Completed For Fast Transient Recovery Setting up Embedded Power Management Lab, EE Dept., IIT Kharagpur PI Completed SPONSORED RESEARCH FUNDING Project Title Agency Role Duration Amount Status (Lakhs) Development of Scalable GaN-based Distributed Imprint India, PI Ongoing Dynamic Power Management System for IoT MHRD Applications with On-Demand Dynamic Thermal Management 6 P a g e

7 7 P a g e Development of low-cost solution for experimentally investigating nonlinear phenomena in high speed digitally controlled DC-DC converter Development of low-cost ultra-fast energy efficient power management solutions for dynamic voltage scaling in multicore parallel embedded processors Development of a single-stage isolated PV microinverter with battery charging capability and low decoupling capacitance BRNS, DAE young scientist research award grant SERB, DST young scientist research grant SERB, DST CONSULTANCY RESEARCH FUNDING PI Ongoing PI Finished Co Ongoing PI Project Title Agency Role Duration Amount (Lacks) Status Development of Scalable GaN-based Distributed Dynamic Power Management System for IoT GE Global PI Ongoing Applications with On-Demand Dynamic Thermal Management Extended Work Research Bangalore Modeling of hysteretic controlled switching converters Texas Instruments, USA Co- PI 2014 (one year) Completed RECENT VISITS/PRESENTATIONS ( ) [1] Visited CoPEC power electronics center, University of Colorado, Boulder, USA, Mar [2] Presented four research papers in IEEE APEC 2016, Long Beach, CA, USA, Mar [3] Presented a seminar ``High Performance Digital Control in High Frequency Switched Mode Power Supply, GE Global Research, Bangalore, India, Feb [4] Presented three research papers in IEEE APEC 2015, Charlotte, NC, USA, Mar [5] Presented three papers in IEEE COMPEL 2014, Santander, Spain, June 2014 [6] Delivered lecture on Beyond the Concept of Critical Bandwidth in Power Converter Circuits as part of a short term course on Modern Trends in Power Electronics, Control and Machine Drives Department of Electrical Engineering, NIT Durgapur, Sept , [7] Delivered lecture on two topics Reconfigurable Hardware in Embedded System and Embedded Control System Implementation using FPGA and, as part of workshop on Embedded and Reconfigurable Computing for Control and Signal Processing, IIT Kharagpur, Jan HARDWARE AND SOFTWARE EXPERTISE Verilog HDL and FPGA prototyping Fixed point implementation, 7 P a g e

8 8 P a g e System level optimization of mixed-signal power management design PCB layout design using Orcad, Simulation software using MATLAB, Pspice, and Simplis PROFESSIONAL ACTIVITIES: Senior Member of IEEE Associate Editor, IEEE Transactions on Power Electronics Reviewer for following peer-reviewed journals IEEE TPEL, IEEE TCAS I and II, IEEE TIE, IEEE TII, IEEE JESTPE, IEEE JETCAS, IET PE, IET Cir. Dev. Syst., and other peer-reviewed journals Reviewer for following premier IEEE conferences APEC, ECCE, ISCAS, IECON, PEDES, and Other peer reviewed conferences 8 P a g e