Associate Professor

Sivakumar Nadarajan

PhD (Electrical and Power Engineering), National University of Singapore, Singapore

Cluster:

Engineering

Profile

Biography

Dr. Sivakumar Nadarajan joined SIT in July 2024, he obtained his PhD in electrical engineering from National University of Singapore, Singapore in 2016. Prior to SIT, he worked in Rolls-Royce, Singapore for 15 years as a technical manager and Head of CoE – Electrical equipment heath monitoring. He has accumulated around 19 years of industrial experiences from aerospace, marine, automotive, and other industrial sectors. He also worked as a lecturer in an Anna university affiliated college in Chennai, India, for a year where he thought electrical engineering modules for undergraduate and post graduate students, his research interests primarily in the field of condition monitoring and failure prognosis of safety and mission critical applications, architect safety critical electrical systems, applied AI for prognostic health management, fault tolerant electrical machines, medium fidelity modelling and simulation, and electrical drives.

Dr. Nadarajan has filed 40 patents in USA and Europe, and published over 50 research papers in international journals and conferences. He is a certified chartered engineer by Institute of Engineering and Technology (IET), UK. He also recognized with various awards for his innovation and technology development, received the 2023 ASEAN outstanding engineering achievement award from AFEO, the 2023 IES prestigious engineering award from IES, Singapore, and also received the Sir Henry Royce awards for innovation and engineering excellence from Rolls-Royce Plc.

Education

PhD (Electrical and Power Engineering)
National University of Singapore , Singapore
M.Tech (Electrical drives and Controls)
Pondicherry Engineering College, Pondicherry University , India
B.Tech (Electrical and Electronics Engineering)
Pondicherry Engineering College, Pondicherry University , India

Achievements

ASEAN outstanding engineering achievement award, issued by AFEO
2023
IES prestigious engineering award, issued by IES, Singapore
2023
Great mentor award | Rolls-Royce corporate lab @ NTU – presented by NTU, Singapore
2022
Sir Henry Royce Award: Finalist in Technology and Innovation Awards
2018
Sir Henry Royce Awards: Runner up in Engineering Excellence award
2017
Rolls-Royce E&T Creativity Awards: Finalists in Best patent Category
2014

Professional Certification

Chartered Engineer (CEng)
Institution of Engineering and Technology (IET)

2017
Project Management Professional (PMP)
Project Management Institute (PMI)

2015

Corporate Experience

Technical manager and Head of CoE, Rolls-Royce Singapore Pte. Ltd.
2009 – 2024
Embedded Software Engineer - Power electronics drives, Delphi Automotive Systems Pte. Ltd.
2007 – 2009
Research Engineer, MS Elevators (Toshiba joint venture) Sdn. Bhd.
2005 – 2007

Publication

Journal Papers

Kumar, Logesh, Sivakumar Nadarajan, Amit K. Gupta, and Hung Dinh Nguyen. 2024. “Compensation of Demagnetization Characteristics to Improve the Turn-to-Turn Short-Circuit Insulation Resistance Estimation in PMSG Using Moving Horizon Estimation Method.” IEEE Journal of Emerging and Selected Topics in Industrial Electronics 5 (1): 242–52. https://doi.org/10.1109/JESTIE.2023.3342702.

Xie, Dunjian, Yan Xu, Sivakumar Nadarajan, Vaiyapuri Viswanathan, and Amit Kumar Gupta. 2024a. “A Transparent Data-Driven Method for Stability-Constrained Load Restoration Considering Multi-Phase Load Dynamics.” IEEE Transactions on Power Systems 39 (1): 366–79. https://doi.org/10.1109/TPWRS.2023.3247945.

Kumar, Logesh, Sivakumar Nadarajan, Amit K. Gupta, and Hung Dinh Nguyen. 2023. “Maintenance Time-Constrained Turn-to-Turn Short Circuit Current Management Framework Considering Electrical and Thermal Limits Using RUL and Parameter Estimation in PMSG.” IEEE Journal of Emerging and Selected Topics in Industrial Electronics, 1–11. https://doi.org/10.1109/JESTIE.2023.3319991.

Nadarajan, Sivakumar, Sanjib Kumar Panda, Bicky Bhangu, and Amit Kumar Gupta. 2016. “Online Model-Based Condition Monitoring for Brushless Wound-Field Synchronous Generator to Detect and Diagnose Stator Windings Turn-to-Turn Shorts Using Extended Kalman Filter.” IEEE Transactions on Industrial Electronics 63 (5): 3228–41. https://doi.org/10.1109/TIE.2016.2535959.

Nadarajan, Sivakumar, S. K. Panda, Bicky Bhangu, and Amit Kumar Gupta. 2015. “Hybrid Model for Wound-Rotor Synchronous Generator to Detect and Diagnose Turn-to-Turn Short-Circuit Fault in Stator Windings.” IEEE Transactions on Industrial Electronics 62 (3): 1888–1900. https://doi.org/10.1109/TIE.2014.2370931.

Xie, Dunjian, Yan Xu, Sivakumar Nadarajan, Vaiyapuri Viswanathan, and Amit Kumar Gupta. 2024b. “Dynamic Frequency-Constrained Load Restoration Considering Multi-Phase Cold Load Pickup Behaviors.” IEEE Transactions on Power Systems 39 (1): 107–18. https://doi.org/10.1109/TPWRS.2022.3225798.

Nguyen, Viethung, Jeevanand Seshadrinath, Danwei Wang, Sivakumar Nadarajan, and Viswanathan Vaiyapuri. 2017. “Model-Based Diagnosis and RUL Estimation of Induction Machines Under Interturn Fault.” IEEE Transactions on Industry Applications 53 (3): 2690–2701. https://doi.org/10.1109/TIA.2017.2669195.

Nguyen, Viethung, Danwei Wang, Jeevanand Seshadrinath, Abhisek Ukil, Merugu Sivarama Krishna, Sivakumar Nadarajan, and Viswanathan Vaiyapuri. 2017. “A Method for Incipient Interturn Fault Detection and Severity Estimation of Induction Motors Under Inherent Asymmetry and Voltage Imbalance.” IEEE Transactions on Transportation Electrification 3 (3): 703–15. https://doi.org/10.1109/TTE.2017.2726351.

Xu, Zhao, Changhua Hu, Feng Yang, Shyh-Hao Kuo, Chi-Keong Goh, Amit Gupta, and Sivakumar Nadarajan. 2017. “Data-Driven Inter-Turn Short Circuit Fault Detection in Induction Machines.” IEEE Access 5: 25055–68. https://doi.org/10.1109/ACCESS.2017.2764474.

Yang, Feng, Mohamed Salahuddin Habibullah, Tianyou Zhang, Zhao Xu, Pin Lim, and Sivakumar Nadarajan. 2016. “Health Index-Based Prognostics for Remaining Useful Life Predictions in Electrical Machines.” IEEE Transactions on Industrial Electronics 63 (4): 2633–44. https://doi.org/10.1109/TIE.2016.2515054.

Patents

Filed date	Title	Filing Countries	Application Numbers	Publication Numbers
12.02.2013	Active Gate Control for improved reliability and availability of switching power devices	United Kingdom; France; United States	1302407.0; 1317490.9; 14/51088; 14/167,088	2510658; 3002050; 20140225659
16.01.2014	Fast detection and protection method for a exciter rotating diode rectifier fault using main field winding parameters	United Kingdom; France; United States; Germany	14198324.7; 1400702.5; 14198324.7; 14/573,759; 14198324.7; 14198324.7	2908148A2; 2908148A2; 2015-0198655; 2908148A2; 2908148A2
16.01.2014	Detection and protection method for a exciter rotating diode rectifier fault	United Kingdom; France; United States; Germany	14198243.9; 1400701.7; 14198243.9; 14/573,573; 14198243.9; 14198243.9	2905630; 2905630; 2015-0198668; 2905630; 2905630
11.03.2014	New characteristic equation to detect and diagnose Broken rotor bars / damper bars in electrical machines	United Kingdom; United States	1404226.1; 14/626,026; 15155695.8	2015-0260794; 2919027A1
30.05.2014	A General Framework for Diagnostics of known and unknown faults	United Kingdom; United States	1409590.5; 14/711,169; 15167600.4	2015-0346066A1; 2950177A1
28.11.2014	Simple method to detect incipient stator winding fault in electrical machine for online condition monitoring	United Kingdom; France; United States; Germany	1421135.3; 15192070.9; 15192070.9; 14/926,853; 15192070.9; 15192070.9	3029478A1; 3029478A1; 2016-0154065; 3029478A1; 3029478A1
23.01.2015	Method and system for stator winding fault diagnosis and distinguishing stator winding fault from voltage unbalance by using current harmonic distortions	United Kingdom; United States	1501133.1; 14/988,302; 16150194.5	2534406; 2016-0216334; 3054307
26.01.2015	Current derivative based open switch fault detection and identification for two-level voltage source inverters	United Kingdom; United States	1600253.7; 1501205.7; 14/991,139	2535010A; 2016-0216332
09.03.2015	Condition monitoring framework for electrical machine to detect and diagnose electrical and mechanical faults	United Kingdom; United States	1503930.8; 15/050,718; 16156041.2	2016-0266208; 3068040
23.04.2015	Method for uniform thermal stress distribution of the devices in the converter	United Kingdom; United States	1506183.1; 15/092,372; 16162743.5	2016-0315558; 3086453A1
23.04.2015	Method for online estimating junction temperature of power devices	United Kingdom; United Kingdom	1506185.6; 1506902.4
04.12.2015	Exciter Rotating Diode Failure Detection in Parallel Redundant Topology	United Kingdom; France; United States; Germany	1521408.3; 16198003.2; 16198003.2; 15/347,499; 16198003.2; 16198003.2	3214757A1; 3214757A1; 2017-0160330A1; 3214757A1; 3214757A1
10.12.2015	Soft-control of gate voltage for enhanced protection of power modules	United Kingdom; United States	1521732.6; 15/348,553	2545236; 2017-0170715
24.03.2016	Inter Turn Fault Mitigation Technique For Axial Flux Permanent Magnet (AFPM) Machine	United Kingdom; France; United States; Germany	17158084.8; 1605038.7; 17158084.8; 15/443,991; 17158084.8; 17158084.8	3223413A1; 3223413A1; 2017-0279400; 3223413A1; 3223413A1
09.08.2016	Method for Demagnetization fault detection in permanent magnet synchronous machine	United Kingdom; United States	1613617.8; 15/653,054; 17181633.3	2018-0045784; 3282268A1
05.10.2016	Stator winding inter-turn short circuit fault detection in Brushless synchronous generator using the stator winding voltage and stator flux	United Kingdom; France; United States; Germany	17190386.7; 1616900.5; 17190386.7; 15/702,182; 17190386.7; 17190386.7	3306330A1; 3306330A1; 2018-0095134; 3306330A1; 3306330A1
10.10.2016	Stator Winding Inter-turn Short Circuit Fault Detection In Electrical Machines Using Acoustic Signal	United Kingdom; United States	1617138.1; 15/705,716; 17191278.5	2018-0100895; 3306284A1
10.11.2016	Moving window RMS and residual analysis based current sensor fault detection method for inverter fed electrical drives	United Kingdom	GB 1618973.0	2555808A
06.12.2022	Thermal Management of Wide Band Gap device based Power converters	United Kingdom	GB 2218292.7
13.12.2022	Power Converter Health Monitoring Using Case Temperature	United Kingdom	GB 2218689.4
13.12.2022	Power Converter Health Monitoring Using Turn-on Switching Energy	United Kingdom	GB 2218690.2
20.12.2022	Method of estimating Mean Time Between Failure (MTBF) in Electrical machines	United Kingdom	GB 2219248.8
04.01.2023	Electric Aircraft Off-Board Data Transfer: Charger-integrated Modem (also see 2022ID00397)	United Kingdom	GB 2300050.8
04.01.2023	Electric Aircraft Off-Board Data Transfer Using Battery Charge Current Direction	United Kingdom	GB 2300049.0
25.07.2023	EHM Integrated Gate Driver for a Power Electronics Converter	United Kingdom	GB 2311386.3.
18.08.2023	Method of data transfer off an electric aircraft using swappable battery	United Kingdom	GB 2312627.9
25.01.2024	Multilane System Equipment Health Monitoring - Gearbox and Bearings	United Kingdom	GB2400995.3
25.01.2024	Multilane System EHM for Electric Aircraft: Propulsion Motor	United Kingdom	GB2400994.6.
25.01.2024	Multilane System EHM for Electric Aircraft: Power Converter (see 2023ID00050)	United Kingdom	GB2400989.6
25.01.2024	Electromechanical fault detection in electrical assets using multivariate methods	United Kingdom	GB2400988.8
05.03.2024	Demagnetization Fault Detection of Propulsion Motor During Electrical Aircraft Pre-start Check	United Kingdom	GB2403154.4
12.04.2024	A novel method of detecting imbalance in multiphase electrical components and systems	United Kingdom	GB2405232.6
19.04.2024	Online Condition Monitoring System for Capacitors in COTS	United Kingdom	GB2405505.5
23.05.2024	Power Converter Health Monitoring Using EM Emission	United Kingdom	GB2407334.8
23.05.2024	Propulsion Motor Bearing Health Monitoring Using Bearing Voltage Measurement	United Kingdom	GB2407335.5
23.05.2024	Portable Aircraft EHM Unit	United Kingdom	GB2407336.3.
05.06.2024	Health Monitoring of Power Converter / Portable Equipment for Power Converter Health monitoring	United Kingdom	GB2407961.8.
05.06.2024	Method for Monitoring Health of Propulsion Motor Bearing	United Kingdom	GB2407959.2
05.06.2024	On-wing Locked Rotor Test for EHM	United Kingdom	GB2407960.0

Conferences

S. Murshid, S. Mondal, S. Nadarajan, X. Yan and S. B. Hee, "Extendable Multisource Multilevel Inverter for Marine Electric Power System," 2024 12th International Conference on Smart Grid (icSmartGrid), Setubal, Portugal, 2024, pp. 782-787, doi: 10.1109/icSmartGrid61824.2024.10578092. keywords: {Software packages;Switching frequency;Loading;Capacitors;Switches;Voltage;Multilevel inverters;Multisource multilevel inverter;level shifted pulse width modulation;decarbonization;marine electric power system},

S. R. Chauhan, K. Kumar, S. Nadarajan, V. Vaiyapuri, B. -H. Soong and H. D. Nguyen, "A Generalized Methodology for Health Index Calculation for PMSM Drive System," 2024 12th International Conference on Smart Grid (icSmartGrid), Setubal, Portugal, 2024, pp. 777-781, doi: 10.1109/icSmartGrid61824.2024.10578167. keywords: {Condition monitoring;Neural networks;Transformers;Real-time systems;Smart grids;Indexes;Reliability;PMSM;Converters;Condition Monitoring;Health Index;Motors;Drive Systems},

L. Kumar, S. Nadarajan, V. Vaiyapuri, A. Gupta, B. -H. Soong and H. D. Nguyen, "Decoupling of Demagnetization Characteristics to Improve the Turn-to-Turn Fault Detection in PMSM Using Machine Learning Methods," IECON 2023- 49th Annual Conference of the IEEE Industrial Electronics Society, Singapore, Singapore, 2023, pp. 1-6, doi: 10.1109/IECON51785.2023.10312485. keywords: {Analytical models;Machine learning algorithms;Atmospheric modeling;Air gaps;Windings;Rotors;Finite element analysis;turn-to-turn short circuit fault;finite element method;demagnetization fault;machine learning;data integrity;permanent magnet synchronous machine},

L. Kumar, P. Pareek, S. Nadarajan, S. Dasgupta, A. Gupta and H. D. Nguyen, "Health-Focused Optimal Power Flow," 2021 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), Washington, DC, USA, 2021, pp. 1-5, doi: 10.1109/ISGT49243.2021.9372240. keywords: {Microgrids;Generators;Power system reliability;Finite element analysis;Indexes;Reliability;Load flow},

L. Kumar, S. Nadarajan, V. Vaiyapuri, A. Gupta, B. -H. Soong and H. D. Nguyen, "Life Estimation of Electrical Machine using Aging Model," IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, Singapore, 2020, pp. 1034-1039, doi: 10.1109/IECON43393.2020.9254606. keywords: {Insulation;Stress;Windings;Aging;Mathematical model;Load modeling;Aerospace materials;Remaining useful life;finite element method;physics of failure model;aging model;accelerated life testing;turn-to-turn short-circuit fault},

S. Rajaram, S. Nadarajan, V. Vaiyapuri, S. Narasimalu and A. Gupta, "Finite Element based Vibration Signature analysis of electrical Propeller Drive System for condition monitoring," 2019 IEEE 4th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON), Chennai, India, 2019, pp. 1-7, doi: 10.1109/CATCON47128.2019.CN0041. keywords: {Propeller;accelerometer;PMSM;vibration;Natural frequency},

S. C. Athikessavan, S. K. Panda, S. Nadarajan and A. K. Gupta, "Diagnosis and Prognosis of LCL Filter in Marine Electric Propulsion Systems," 2019 IEEE 13th International Conference on Power Electronics and Drive Systems (PEDS), Toulouse, France, 2019, pp. 1-5, doi: 10.1109/PEDS44367.2019.8998852. keywords: {Capacitance;Capacitors;Resonant frequency;Degradation;Inductors;Capacitive sensors},

K. Thiha, B. -H. Soong, V. Vaiyapuri and S. Nadarajan, "A new method of defeating reactive jamming: Hardware Design Approach," 2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA), Xi'an, China, 2019, pp. 184-188, doi: 10.1109/ICIEA.2019.8834161. keywords: {Jamming;Transmitters;Wireless sensor networks;Wireless communication;Receivers;Standards;Timing;Anti-jamming;reactive jamming;timing channel},

A. Subramaniam, S. S. Manohar, S. Bhandari, S. Nadarajan, A. K. Gupta and S. K. Panda, "Condition Monitoring framework for Converter Transformers used in Marine Electric Propulsion," 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Chennai, India, 2018, pp. 1-4, doi: 10.1109/PEDES.2018.8707737. keywords: {Power transformer insulation;Windings;Circuit faults;Propulsion;Condition monitoring;Monitoring;Sensors;Transformer condition monitoring;marine electric propulsion;fault diagnosis;electrical signature;magnetic signature},

Z. Xu, J. Hu, C. Hu, S. Nadarajan, C. -k. Goh and A. Gupta, "Data-Driven Fault Detection of Electrical Machine," 2018 15th International Conference on Control, Automation, Robotics and Vision (ICARCV), Singapore, 2018, pp. 515-520, doi: 10.1109/ICARCV.2018.8581353. keywords: {Feature extraction;Circuit faults;Fault detection;Resistance;Time series analysis;Support vector machines;Data mining},

S. S. Manohar, A. Subramaniam, M. Bagheri, S. Nadarajan, A. k. Gupta and S. K. Panda, "Transformer Winding Fault Diagnosis by Vibration Monitoring," 2018 Condition Monitoring and Diagnosis (CMD), Perth, WA, Australia, 2018, pp. 1-6, doi: 10.1109/CMD.2018.8535726. keywords: {Vibrations;Windings;Circuit faults;Power transformer insulation;Oil insulation;Magnetic cores;Dry type transformer;Winding vibration;Fault diagnosis;Marine Transformer},

D. Wang et al., "Interturn fault and condition identification in BLSG using multiple indicator approach," 2017 IEEE Power & Energy Society General Meeting, Chicago, IL, USA, 2017, pp. 1-5, doi: 10.1109/PESGM.2017.8273728. keywords: {Conferences;Industrial electronics;Indexes;Mathematical model;Stators;Synchronous machines;Rectifiers;Brushless synchronous machines;load imbalance;fault diagnosis},

P. S. Kumar, L. Xie, K. Thiha, B. -H. Soong, V. Vaiyapuri and S. Nadarajan, "Rotor mounted wireless sensors for condition monitoring of brushless synchronous generator," IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, Beijing, China, 2017, pp. 3221-3226, doi: 10.1109/IECON.2017.8216544. keywords: {Circuit faults;Windings;Rotors;Sensors;Wireless sensor networks;Wireless communication;Stators;Brushless Synchronous Generator;Condition Monitoring;Winding Fault;Wireless Sensor Network (WSN)},

K. Ahsanullah, E. Jeyasankar, A. N. Vignesh, S. K. Panda, R. Shanmukha and S. Nadarajan, "Eccentricity fault analysis in PMSM based marine propulsion motors," 2017 20th International Conference on Electrical Machines and Systems (ICEMS), Sydney, NSW, Australia, 2017, pp. 1-6, doi: 10.1109/ICEMS.2017.8056162. keywords: {Coils;Vibrations;Stator windings;Air gaps;Rotors;Permanent magnet motors;Eccentricity Fault;Permanent Magnet Synchronous Motor;Search Coils;Vibration Monitoring},

K. Ahsanullah, E. Jeyasankar, S. K. Panda, R. Shanmukha and S. Nadarajan, "Detection and analysis of winding and demagnetization faults in PMSM based marine propulsion motors," 2017 IEEE International Electric Machines and Drives Conference (IEMDC), Miami, FL, USA, 2017, pp. 1-7, doi: 10.1109/IEMDC.2017.8002050. keywords: {Demagnetization;Circuit faults;Magnetic flux;Coils;Magnetic hysteresis;Windings;Propulsion;Propulsion motor;Permanent Magnet sSsynchronous Machine (PMSM);Condition Monitoring;Demagnetization fault;Inter-turns fault;Search Coils;Hilbert-Huang Transform},

D. Wang, J. Seshadrinath, V. Nguyen, A. Ukil, V. Vaiyapuri and S. Nadarajan, "Inter-turn fault and condition identification in induction machines using multiple indicator approach," 2016 IEEE Region 10 Conference (TENCON), Singapore, 2016, pp. 2990-2995, doi: 10.1109/TENCON.2016.7848594. keywords: {Mathematical model;Stator windings;Fault diagnosis;Induction machines;Windings;Load modeling;Induction machines;voltage imbalance;fault diagnosis},

K. Ahsanullah, S. K. Panda, R. Shanmukha and S. Nadarajan, "Inter-turns fault diagnosis for surface permanent magnet based marine propulsion motors," 2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC), Auckland, New Zealand, 2016, pp. 1-6, doi: 10.1109/SPEC.2016.7846131. keywords: {Circuit faults;Torque;Harmonic analysis;Coils;Synchronous motors;Permanent magnet motors;Induction motors;Condition monitoring;Permanent magnet synchronous machines;inter-turns fault;marine propulsion},

S. Nadarajan, A. K. Gupta and S. K. Panda, "Review of smart grid requirements and design standards for future Naval vessels," 2016 IEEE International Conference on Sustainable Energy Technologies (ICSET), Hanoi, Vietnam, 2016, pp. 338-343, doi: 10.1109/ICSET.2016.7811806. keywords: {IP networks;Smart grids;Power system stability;Load management;Quality of service;Interrupters;Naval vessel;smart grid;microgrid;Integrated Power System},

A. S. Chandar, S. K. Panda, S. Nadarajan and A. K. Gupta, "Winding fault detection in coupled inductors using a single flux sensor," IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, Florence, Italy, 2016, pp. 1554-1559, doi: 10.1109/IECON.2016.7793934. keywords: {Inductors;Windings;Circuit faults;Analytical models;Phase transformers;Magnetic cores;Power transformers;Coupled inductor;Winding fault;Leakage flux;Yoke},

V. Nguyen, D. Wang, J. Seshadrinath, S. Nadarajan and V. Vaiyapuri, "Fault severity estimation using nonlinear Kalman filter for induction motors under inter-turn fault," IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, Florence, Italy, 2016, pp. 1488-1493, doi: 10.1109/IECON.2016.7792962. keywords: {Circuit faults;Stator windings;Radio frequency;Mathematical model;Estimation;Kalman filters;Fault parameter estimation;winding inter-turn fault;nonlinear Kalman filter;induction motor;sequence component model},

A. Subramaniam, S. Bhandari, M. Bagheri, N. Sivakumar, A. K. Gupta and S. K. Panda, "Online condition monitoring and diagnosis techniques for dry type transformers incipient fault analysis through finite element modelling," 2016 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific), Busan, Korea (South), 2016, pp. 024-028, doi: 10.1109/ITEC-AP.2016.7512916. keywords: {Partial discharges;Relays;Condition monitoring;Facsimile;Insulation;Discharges (electric);Thermal sensors;fault diagnosis;transformer;online monitoring;dry-type},

P. S. Kumar, Y. Chen, M. Y. Lee, S. Nadarajan and L. Xie, "Modified winding function approach to stator fault modelling of synchronous generator," 2016 12th IEEE International Conference on Control and Automation (ICCA), Kathmandu, Nepal, 2016, pp. 161-166, doi: 10.1109/ICCA.2016.7505269. keywords: {Windings;Circuit faults;Mathematical model;Stator windings;Integrated circuit modeling;Computational modeling},

D. Wang et al., "A multiple indicator approach for FDI of inter-turn fault in induction machines," 2016 IEEE International Conference on Industrial Technology (ICIT), Taipei, Taiwan, 2016, pp. 128-133, doi: 10.1109/ICIT.2016.7474738. keywords: {Circuit faults;Fault diagnosis;Induction machines;Integrated circuit modeling;Mathematical model;Insulation;Degradation;Inter-turn fault;Induction Machines;Fault Diagnosis;Fault Isolation;Voltage Imbalances},

S. Nadarajan, B. Bhangu, S. K. Panda and A. K. Gupta, "Comparing Extended Kalman Filter and Particle Filter for estimating field and damper bar currents in Brushless Wound Field Synchronous Generator for stator winding fault detection and diagnosis," 2016 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2016, pp. 715-719, doi: 10.1109/APEC.2016.7467950. keywords: {Shock absorbers;State estimation;Rotors;Circuit faults;Stator windings;Bars;Condition monitoring;Synchronous generator;Condition monitoring;fault detection and diagnosis;marine generator;aerospace generator;winding fault;brushless synchronous generator},

V. Nguyen, D. Wang, A. Ukil, S. Nadarajan, V. Vaiyapuri and C. Jayampathi, "A closed-form solution to fault parameter estimation and faulty phase identification of stator winding inter-turn fault in induction machines," IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, Yokohama, Japan, 2015, pp. 000286-000291, doi: 10.1109/IECON.2015.7392113. keywords: {Stator windings;Circuit faults;Mathematical model;Radio frequency;Rotors;Resistance},

S. Nadarajan, B. Bhangu, S. K. Panda and A. K. Gupta, "Feasibility analysis of auxiliary winding for condition monitoring of wound field brushless synchronous generators," IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, Yokohama, Japan, 2015, pp. 003370-003375, doi: 10.1109/IECON.2015.7392620. keywords: {Windings;Circuit faults;Stator windings;Rotors;Condition monitoring;Harmonic analysis;Synchronous generator;Condition monitoring;fault detection and diagnosis;marine generator;aerospace generator;winding fault;brushless synchronous generator},

S. Nadarajan, R. Wang, A. Kumar Gupta and S. Kumar Panda, "Vibration signature analysis of stator winding fault diagnosis in brushless synchronous generators," 2015 IEEE International Transportation Electrification Conference (ITEC), Chennai, India, 2015, pp. 1-6, doi: 10.1109/ITEC-India.2015.7386919. keywords: {Circuit faults;Vibrations;Stator windings;Windings;Harmonic analysis;Fault diagnosis;Generators},

Ma Xiaohe et al., "Review of high speed electrical machines in gas turbine electrical power generation," TENCON 2015 - 2015 IEEE Region 10 Conference, Macao, 2015, pp. 1-9, doi: 10.1109/TENCON.2015.7372765. keywords: {Magnetostriction;Turbines;Reliability engineering;Generators;Pumps;Engines;High Power Density;High Speed;Starter / Generator},

V. H. Nguyen, D. Wang, M. Yu, V. Vaiyapuri and S. Nadarajan, "A survey of fault indicators for stator winding inter-turn fault detection in low-voltage induction machines," 2015 IEEE 10th Conference on Industrial Electronics and Applications (ICIEA), Auckland, New Zealand, 2015, pp. 1380-1385, doi: 10.1109/ICIEA.2015.7334324. keywords: {Conferences;Industrial electronics},

A. S. Chandar, S. K. Panda, S. Nadarajan and A. K. Gupta, "Condition monitoring and winding fault detection of inductors in LCL filter integrated with active front end rectifier," 2015 IEEE Energy Conversion Congress and Exposition (ECCE), Montreal, QC, Canada, 2015, pp. 3922-3927, doi: 10.1109/ECCE.2015.7310214. keywords: {Inductors;Windings;Magnetic flux;Integrated circuit modeling;Mathematical model;Magnetic fields;Power harmonic filters;Condition monitoring;Active Front End Rectifier inductors;winding flux;fundemantal component;FFT},

M. Yu et al., "Model-based failure prediction for electric machines using particle filter," 2014 13th International Conference on Control Automation Robotics & Vision (ICARCV), Singapore, 2014, pp. 1811-1816, doi: 10.1109/ICARCV.2014.7064591. keywords: {Circuit faults;Stator windings;Rotors;Induction motors;Windings;Insulation;Couplings},

N. Sivakumar, B. Bhangu, S. K. Panda and A. K. Gupta, "Improved Brushless Synchronous Generator model to study the turn-to-turn short circuit fault," 2014 IEEE PES General Meeting | Conference & Exposition, National Harbor, MD, USA, 2014, pp. 1-5, doi: 10.1109/PESGM.2014.6939442. keywords: {Circuit faults;Windings;Integrated circuit modeling;Inductance;Mathematical model;Synchronous generators;Stator windings;Synchronous generat or;condition monitoring;fault detection and diagnosis;marine generator;aerospace generator;winding fault;brushless synchronous generator},

N. Sivakumar, B. Bhangu, S. K. Panda and A. K. Gupta, "Dynamic model of Brushless Synchronous Generator with turn-to-turn short circuit fault for condition monitoring," 2013 IEEE ECCE Asia Downunder, Melbourne, VIC, Australia, 2013, pp. 258-263, doi: 10.1109/ECCE-Asia.2013.6579106. keywords: {Mathematical model;Monitoring;Windings;Reliability;MATLAB;Insulation;Time-frequency analysis;Synchronous generator;Condition monitoring;fault detection and diagnosis;marine generator;aerospace generator;winding fault;brushless synchronous generator},

C. J. Gajanayake, B. Bhangu, S. Nadarajan and G. Jayasinghe, "Fault tolerant control method to improve the torque and speed response in PMSM drive with winding faults," 2011 IEEE Ninth International Conference on Power Electronics and Drive Systems, Singapore, 2011, pp. 956-961, doi: 10.1109/PEDS.2011.6147371. keywords: {Mathematical model;Windings;Circuit faults;Fault tolerance;Fault tolerant systems;Torque;Inverters},

A Verma, H Kuthubudeen, V Vaiyapuri, S Nadarajan, N Srikanth, A Gupta. 2019, “Bearings fault diagnosis in electromechanical system using transient motor current signature analysis” in Advances in Condition Monitoring and Structural Health Monitoring: WCCM 2019

SS Manohar, A Subramaniam, M Bagheri, S Nadarajan, A kumar Gupta. 2018, “Transformer winding fault diagnosis by vibration monitoring”, in Condition Monitoring and Diagnosis (CMD), 1-6

Viethung Nguyen, Danwei Wang, Jeevanand Seshadrinath, Abhisek Ukil, Viswanathan Vaiyapuri, Sivakumar Nadarajan. 2017, “Parameter Estimation Using Particle Filter for Induction Machines under Inter-Turn Fault”, in PHM Society Asia-Pacific Conference, 2017

Subramaniam, S. Bhandari, M. Bagheri, N. Sivakumar, A. K. Gupta, and S. Kumar, “Online Condition Monitoring and Diagnosis techniques for Dry Type Transformers” pp. 24–28, 2016.

Xiaohe Ma, Shuai Wang, King Jet Tseng, Rong Su, Viswanathan Vaiyapuri, Chandana Gajnayake, Amit Kumar Gupta, Sivakumar Nadarajan, 2015, “Review of electrical machines for high speed operation in gas turbine electrical power generation” in SAE Technical Paper, 2015-01-1205

M Bagheri, A Subramaniam, S Bhandari, S Chandar, S Nadarajan, AK Gupta, SK Panda. 2015, “Dry-type Transformer Aging Factor in Various Loads and Environmental Conditions” in ITCE'15, 2015

Zhimin Yuan, Wee Tiong Tey, Tomasz Karol Maszczyk, Daniel Lim, Sivakumar Nadarajan, Viswanathan Vaiyapuri, Amit Gupta, Sathyanarayan Rajaram. 2022, “Non-contact equipment fault detection using audio and magnetic sensors”, in Proc. of the 9th Intl. Conf. of Asian Society for Precision Engg. and Nanotechnology (ASPEN 2022)

S Chandar, S Nadarajan, AK Gupta, SK Panda. 2014, “Online Bearing Fault Detection of Induction Machine using |iαβ|2 Spectrum and its advantage over Single Phase Current Spectrum” in July 2014, Conference on IEEE PES general meeting at Washington, USA

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