Anantaram Varatharajan

Anantaram Varatharajan
  • Biography

    Anantaram's research focuses on the control of electrical machines and drives, with broader goals on efficiency and reliability. His Ph.D. work dealt with developing position sensorless control techniques for synchronous motors and self-commissioning methods for machine identification. He is a recipient of Best Ph.D. Thesis Award from IEEE Industrial Electronics Society, Italy Chapter, and Best Student Paper Award from IEEE Workshop on Electrical Machine Design, Control and Diagnosis, 2021.

  • Recent News & Events

  • Internships with Anantaram

    • MD1917: Learning and Optimization for Motor Drives

      The Electric Machines and Devices team at MERL is seeking motivated and qualified individuals to assist in the development of advanced motor drives technologies. The project goals are twofold: (i) explore model-based optimization methods to design switching voltage sequence for switching losses minimization; (ii) machine learning methods to model the nonlinear flux to current relationship (flux-map) of synchronous machines with spatial harmonics from the real-time experimental data during the commissioning process. The background of the ideal candidate is expected to overlap with at least one of the project goals, if not two. Senior PhD candidates working in mixed integer optimization, model predictive control or machine learning are encouraged to apply. Capability of implementing the algorithm in MATLAB and coding in C are a necessity. Knowledge of motor drives and hands-on experience in real-time systems are a plus. The expected duration of the internship is 3-6 months, preferably onsite at MERL and the start date is flexible.

    See All Internships at MERL
  • Other Publications

    •  Anantaram Varatharajan, Gianmario Pellegrino and Eric Armando, "Direct Flux Vector Control of Synchronous Motor Drives: Accurate Decoupled Control With Online Adaptive Maximum Torque Per Ampere and Maximum Torque Per Volts Evaluation", IEEE Transactions on Industrial Electronics, Vol. 69, No. 2, pp. 1235-1243, 2022.
      BibTeX
      • @Article{9363639,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario and Armando, Eric},
      • title = {Direct Flux Vector Control of Synchronous Motor Drives: Accurate Decoupled Control With Online Adaptive Maximum Torque Per Ampere and Maximum Torque Per Volts Evaluation},
      • journal = {IEEE Transactions on Industrial Electronics},
      • year = 2022,
      • volume = 69,
      • number = 2,
      • pages = {1235--1243}
      • }
    •  Anantaram Varatharajan, Gianmario Pellegrino, Guilherme Bueno Mariani, Nicolas Voyer and Akira Satake, "LUT-Less Sensorless Control of Synchronous Reluctance Machines Using the Locus of Incremental Saliency Ratio Tracking (LIST)", IEEE Transactions on Industrial Electronics, Vol. 69, No. 7, pp. 6530-6539, 2022.
      BibTeX
      • @Article{9507334,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario and Mariani, Guilherme Bueno and Voyer, Nicolas and Satake, Akira},
      • title = {LUT-Less Sensorless Control of Synchronous Reluctance Machines Using the Locus of Incremental Saliency Ratio Tracking (LIST)},
      • journal = {IEEE Transactions on Industrial Electronics},
      • year = 2022,
      • volume = 69,
      • number = 7,
      • pages = {6530--6539}
      • }
    •  Anantaram Varatharajan, Gianmario Pellegrino and Eric Armando, "Signal-Injection Sensorless Control of Synchronous Reluctance Machines for Overload Operation", IEEE Transactions on Power Electronics, Vol. 37, No. 5, pp. 5874-5883, 2022.
      BibTeX
      • @Article{9626601,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario and Armando, Eric},
      • title = {Signal-Injection Sensorless Control of Synchronous Reluctance Machines for Overload Operation},
      • journal = {IEEE Transactions on Power Electronics},
      • year = 2022,
      • volume = 37,
      • number = 5,
      • pages = {5874--5883}
      • }
    •  Anantaram Varatharajan, Gianmario Pellegrino and Eric Armando, "Kinetic-Rotor Self-Commissioning of Synchronous Machines for Magnetic Model Identification with Online Adaptation", IEEE Transactions on Industry Applications, pp. 1-1, 2022.
      BibTeX
      • @Article{9712411,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario and Armando, Eric},
      • title = {Kinetic-Rotor Self-Commissioning of Synchronous Machines for Magnetic Model Identification with Online Adaptation},
      • journal = {IEEE Transactions on Industry Applications},
      • year = 2022,
      • pages = {1--1}
      • }
    •  Anantaram Varatharajan, Gianmario Pellegrino and Eric Armando, "Sensorless Synchronous Reluctance Motor Drives: Auxiliary Flux-Based Position Observer", IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 9, No. 4, pp. 4330-4339, 2021.
      BibTeX
      • @Article{9178310,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario and Armando, Eric},
      • title = {Sensorless Synchronous Reluctance Motor Drives: Auxiliary Flux-Based Position Observer},
      • journal = {IEEE Journal of Emerging and Selected Topics in Power Electronics},
      • year = 2021,
      • volume = 9,
      • number = 4,
      • pages = {4330--4339}
      • }
    •  Anantaram Varatharajan, Gianmario Pellegrino, Eric Armando and Marko Hinkkanen, "Sensorless Control of Synchronous Motor Drives: Accurate Torque Estimation and Control Under Parameter Errors", IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 9, No. 5, pp. 5367-5376, 2021.
      BibTeX
      • @Article{9257471,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario and Armando, Eric and Hinkkanen, Marko},
      • title = {Sensorless Control of Synchronous Motor Drives: Accurate Torque Estimation and Control Under Parameter Errors},
      • journal = {IEEE Journal of Emerging and Selected Topics in Power Electronics},
      • year = 2021,
      • volume = 9,
      • number = 5,
      • pages = {5367--5376}
      • }
    •  Anantaram Varatharajan, Gianmario Pellegrino, Eric Armando and Marko Hinkkanen, "Sensorless Synchronous Motor Drives: A Review of Flux Observer-Based Position Estimation Schemes Using the Projection Vector Framework", IEEE Transactions on Power Electronics, Vol. 36, No. 7, pp. 8171-8180, 2021.
      BibTeX
      • @Article{9312430,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario and Armando, Eric and Hinkkanen, Marko},
      • title = {Sensorless Synchronous Motor Drives: A Review of Flux Observer-Based Position Estimation Schemes Using the Projection Vector Framework},
      • journal = {IEEE Transactions on Power Electronics},
      • year = 2021,
      • volume = 36,
      • number = 7,
      • pages = {8171--8180}
      • }
    •  Anantaram Varatharajan, Gianmario Pellegrino and Eric Armando, "Direct Flux Vector Control of Synchronous Motor Drives: A Small-Signal Model for Optimal Reference Generation", IEEE Transactions on Power Electronics, Vol. 36, No. 9, pp. 10526-10535, 2021.
      BibTeX
      • @Article{9382895,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario and Armando, Eric},
      • title = {Direct Flux Vector Control of Synchronous Motor Drives: A Small-Signal Model for Optimal Reference Generation},
      • journal = {IEEE Transactions on Power Electronics},
      • year = 2021,
      • volume = 36,
      • number = 9,
      • pages = {10526--10535}
      • }
    •  Anantaram Varatharajan and Gianmario Pellegrino, "Sensorless Synchronous Reluctance Motor Drives: A General Adaptive Projection Vector Approach for Position Estimation", IEEE Transactions on Industry Applications, Vol. 56, No. 2, pp. 1495-1504, 2020.
      BibTeX
      • @Article{8941242,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario},
      • title = {Sensorless Synchronous Reluctance Motor Drives: A General Adaptive Projection Vector Approach for Position Estimation},
      • journal = {IEEE Transactions on Industry Applications},
      • year = 2020,
      • volume = 56,
      • number = 2,
      • pages = {1495--1504}
      • }
    •  Anantaram Varatharajan, Paolo Pescetto and Gianmario Pellegrino, "Sensorless Synchronous Reluctance Motor Drives: A Full-Speed Scheme Using Finite-Control-Set MPC in a Projection Vector Framework", IEEE Transactions on Industry Applications, Vol. 56, No. 4, pp. 3809-3818, 2020.
      BibTeX
      • @Article{9079671,
      • author = {Varatharajan, Anantaram and Pescetto, Paolo and Pellegrino, Gianmario},
      • title = {Sensorless Synchronous Reluctance Motor Drives: A Full-Speed Scheme Using Finite-Control-Set MPC in a Projection Vector Framework},
      • journal = {IEEE Transactions on Industry Applications},
      • year = 2020,
      • volume = 56,
      • number = 4,
      • pages = {3809--3818}
      • }
    •  Anantaram Varatharajan and Gianmario Pellegrino, "Sensorless Synchronous Reluctance Motor Drives: A Projection Vector Approach for Stator Resistance Immunity and Parameter Adaptation", IEEE Transactions on Industry Applications, Vol. 56, No. 5, pp. 5003-5012, 2020.
      BibTeX
      • @Article{9141387,
      • author = {Varatharajan, Anantaram and Pellegrino, Gianmario},
      • title = {Sensorless Synchronous Reluctance Motor Drives: A Projection Vector Approach for Stator Resistance Immunity and Parameter Adaptation},
      • journal = {IEEE Transactions on Industry Applications},
      • year = 2020,
      • volume = 56,
      • number = 5,
      • pages = {5003--5012}
      • }