Concordia University

https://www.concordia.ca/content/concordia/en/faculty.html

Dr. Chunyan Lai

Assistant Professor, Electrical and Computer Engineering

Office: S-EV 005.401 
Engineering, Computer Science and Visual Arts Integrated Complex,
1515 St. Catherine W.
Phone: (514) 848-2424 ext. 5279
Email: chunyan.lai@concordia.ca

Teaching activities

ELEC 440/6491 Controlled Electric Drives


Research activities

Research activities

Electric motor drives and controls
Electrified vehicles
Power electronics
Charging station design and optimization

PhD Position (Fall 2019) in Distributed Charging Station Design and Control for Vehicle to Grid Solutions

Charging stations put significant stress on the electric grid in terms of power quality and load, which might be alleviated by integrating local renewables and battery capacity. Pooling distributed charging stations with both local and centralized intelligence minimizes communication overhead so that larger storage capacities can be managed in the pool. In addition to the intelligent coupling of storage capacities in vehicles, external larger storage units can also be implemented at critical points in the medium and low-voltage grid in order to support the charging infrastructure in a targeted manner and to avoid local overloading of the existing infrastructure. The challenge still lies in determining the optimal locations, in the correct dimensioning of the batteries and in the intelligent control of the loading and unloading. Also, the costs in relation to a conventional grid expansion must be analyzed in order to find the best economical solution. Through predictive control in neighborhood control systems, network expansion costs can be minimized by intelligent vehicle loading, optimally integrated locally generated photovoltaic power,exploitation of power surpluses in the grid and electricity shortfalls compensated by feeding back to the grid.

The PhD candidate with the right background in control and electrical power engineering will be recruited for this project to optimally design and distribute charging stations in urban areas and control them in a way to minimize grid impacts.

To apply, the candidate must meet all the requirements for the PhD program at Concordia University as specified: http://www.concordia.ca/admissions/graduate/requirements/minimum.html

Please send your CV, transcripts and a research plan for the proposed project to chunyan.lai@concordia.ca, with an Email subject line of “Application for PhD Position in Vehicle to Grid Solutions from xxx (your name)”. The most suitable candidate will be contacted.


Publications

Published and Accepted Peer-Reviewed Journal Papers:

[1]         C. Lai, G. Feng, J. Tjong and N. C. Kar, “Direct Calculation of Maximum-Torque-Per-Ampere Angle for Interior PMSM Control Using Measured Speed Harmonic,” IEEE Transactions on Power Electronics, vol. 33, no. 11, pp. 9744-9752, Nov. 2018.

[2]         S. Mukundan, H. Dhulipati, C. Lai, K. Mukherjee and N. C. Kar, “Design and Optimization of Traction IPMSM with Asymmetrical Damper Bars for Integrated Charging Capability using Evolutionary Algorithm,” IEEE Transactions on Energy Conversion, conditionally accepted on Oct. 12, 2018.

[3]         G. Feng, C. Lai, J. Tian, J. Tjong, and N. C. Kar,"Multiple Reference Frame based Torque Ripple Minimization for PMSM Drive Under Both Steady-State and Transient Conditions,” IEEE Transactions on Power Electronics, accepted on Oct. 05, 2018.

[4]         K. L. V. Iyer, C. Lai, S. Mukundan, H. Dhulipati, K. Mukherjee, and N. C. Kar, “Investigation of Interior Permanent Magnet Motor with Dampers for Electric Vehicle Propulsion and Mitigation of Saliency Effect during Integrated Charging Operation,” IEEE Transactions on Vehicular Technology, accepted on July 20th, 2018.

[5]         A. Balamurali, G. Feng, C. Lai, J. Tjong,and N. C. Kar, “Maximum Efficiency Control of PMSM Drives Considering Harmonic Losses Using Gradient Descent Algorithm based on DC Power Measurement,” IEEE Transactions on Energy Conversion,accepted on June 15th,2018.

[6]         G. Feng, C. Lai, M. Kelly, and N. C. Kar,“Dual Three-phase PMSM Torque Modelling and Maximum Torque per Peak Current Control through Optimized Harmonic Current Injection”, IEEE Transactions on Industrial Electronics, accepted on June 13th,2018.

[7]         G. Feng, C. Lai, and N. C. Kar, “Speed Harmonic based Modeling and Estimation of Permanent Magnet Temperature for PMSM Drive Using Kalman Filter,” IEEE Transactions on Industrial Informatics, accepted on May 29th, 2018.

[8]         G. Feng, C. Lai, and N. C. Kar.“Non-invasive Kalman Filter based Permanent Magnet Temperature Estimation for Permanent Magnet Synchronous Machines,” IEEE Transactions on Power Electronics, vol. 33, no. 12, pp. 10673-10682,Dec. 2018.

[9]         C. Lai, G. Feng, K. Mukherjee, J. Tjong, and N. C. Kar, “Maximum Torque per Ampere Control for IPMSM Using Gradient Descent Algorithm based on Measured Speed Harmonics,” IEEE Transactions on Industrial Informatics, vol. 14, no. 4, pp. 1424-1435,April 2018.

[10]     C. Lai, G. Feng, K. Mukherjee,V. Loukanov, and N. C. Kar, “Torque Ripple Modeling and Minimization for Interior PMSM Considering Magnetic Saturation,” IEEE Transactions on Power Electronics, vol. 33, no. 3, pp. 2417-2429, March 2018.

[11]     K.L.V. Iyer, C. Lai, S. Mukundan, H. Dhulipati, K. Mukherjee, and N. C. Kar, “Investigation of a Six-phase Interior Permanent Magnet Synchronous Machine for Integrated Charging and Propulsion in EVs,” SAE International Journal of Alternative Powertrains, vol. 7, no. 2, 2018.

[12]      K. L. V. Iyer, C. Lai, S. Mukundan et al., “A Novel MTPA Theory based Bottom-Up Approachtowards Parametric and Structural Design of Interior PMSM for Direct-Drive Electric Vehicles,” Intl. Trans. Electrical Energy Systems, vol.28, no.2, e2489, Feb. 2018.

[13]      G. Feng, C. Lai, K. L. V. Iyer, and N. C. Kar, “Improved High-Frequency Voltage Injection based Permanent Magnet Temperature Estimation for PMSM Condition Monitoring for EV Applications,” IEEE Transactions on Vehicular Technology, vol. 67, no. 1, pp. 216-225, 2018.

[14]      G. Feng,C. Lai, and N. C. Kar, “Practical Testing Solutions to Optimal Stator Harmonic Current Design for PMSM Torque Ripple Minimization Using Speed Harmonics,” IEEE Transactions on Power Electronics,vol. 33, no. 6, pp. 5181-5191, 2018.

[15]     C. Lai, G. Feng, K. L. V. Iyer, K. Mukherjee, and N. C. Kar, “Genetic Algorithm-Based Current Optimization for Torque Ripple Reduction of Interior PMSMs,” IEEE Transactions on Industry Applications, vol. 53, no. 5, pp. 4493-4503,Sept.-Oct. 2017.

[16]     C. Lai, G. Feng, K. Mukherjee,and N. C. Kar, “Investigations of the Influence of PMSM Parameter Variations in Optimal Stator Current Design for Torque Ripple Minimization,” IEEE Transactions on Energy Conversion, vol. 32, no. 3, pp. 1052-1062, Sept.2017.

[17]      K. L. V. Iyer, C. Lai, S. Mukundan, H. Dhulipati, K. Mukherjee, and N. C. Kar,“Investigation of Challenges in Interior and Surface Permanent Magnet Synchronous Machines during Integrated Charging Operation in Electric Vehicles,” Intl. Journal of Powertrains, accepted on Aug. 27th, 2017.

[18]     G. Feng, C. Lai, and N. C. Kar, “An Analytical Solution to Optimal Stator Current Design for PMSM Torque Ripple Minimization with Minimal Machine Losses,” IEEE Transactions on Industrial Electronics, vol. 64, no. 10, pp. 7655-7665, Oct. 2017.

[19]      C. Lai, G. Feng, K. Mukherjee, V. Loukanov, and N. C. Kar, “Torque Ripple Minimization for Interior PMSM with Consideration of Magnetic Saturation Incorporating Online Parameter Identification,” IEEE Transactions on Magnetics, vol. 53, no. 6, pp. 1-4, June 2017.

[20]     G. Feng, C. Lai, K. Mukherjee,and N. C. Kar, “Online PMSM Magnet Flux-Linkage Estimation for Rotor Magnet Condition Monitoring Using Measured Speed Harmonics,” IEEE Transactions on Industry Applications, vol. 53, no. 3, pp. 2786-2794, May-June 2017.

[21]      G. Feng,C. Lai, and N. C. Kar, “A Closed-Loop Fuzzy Logic based Current Controller for PMSM Torque Ripple Minimization Using the Magnitude of Speed Harmonic as the Feedback Control Signal,” IEEE Transactions on Industrial Electronics, vol. 64, no. 4, pp. 2642-2653,April 2017.

[22]     G. Feng, C. Lai, and N. C.Kar, “Particle-Filter-Based Magnet Flux Linkage Estimation for PMSM Magnet Condition Monitoring Using Harmonics in Machine Speed,” IEEE Transactions on Industrial Informatics, vol. 13, no. 3, pp. 1280-1290, June 2017.

[23]     G. Feng, C. Lai, and N. C. Kar, “Expectation-Maximization Particle-Filter- and Kalman-Filter-Based Permanent Magnet Temperature Estimation for PMSM Condition Monitoring Using High-Frequency Signal Injection,” IEEE Trans. Ind. Informat., vol. 13,no. 3, pp. 1261-1270, June 2017.

[24]     X. Lu, K. L. V. Iyer, C. Lai, K. Mukherjee, and N. C. Kar, “Design and Testing of a Multi-Port Sustainable DC Fast Charging System for EV/PHEV,” Journal of Electric Power Components and Systems, vol. 44,no. 14, pp. 1576-1587, Aug. 2016.

[25]     G. Feng, C. Lai, K. Mukherjee, and N. C. Kar, “Current Injection based On-Line Parameter and VSI Nonlinearity Estimation for PMSM Drives Using Current and Voltage DC Components,” IEEE Transaction on Transportation Electrification, vol. 2, no. 2, pp. 119-128, June 2016.

[26]     G. Feng, C. Lai, and N. C. Kar, “A Novel CurrentInjection based Online Parameter Estimation Method for PMSMs ConsideringMagnetic Saturation,” IEEE Trans. Magn., vol. 52, no. 7, 2016.

[27]     A. Balamurali, C. Lai, and N. C. Kar, “Analytical Investigation of Magnet Eddy Current Losses in Interior Permanent Magnet Motor Using Modified Winding Function Theory Accounting for Pulse Width Modulation Harmonics,” IEEE Transaction on Magnetics, vol. 52, no. 7, 2016.

[28]     C. Lai, K. L. V. Iyer, K. Mukherjee, and N. C. Kar, “Analysis of the Electromagnetic Torque and the Effective Winding Inductance of a Surface-Mounted PMSM under Integrated Battery Charging Operation,” IEEE Transaction on Magnetics, vol. 51, no. 11,Nov. 2015.

[29]      N. C. Kar, K. L. V. Iyer, A. Labak, X. Lu, C. Lai, A. Balamurali, B. Esteban, and M.Sid-Ahmed, “Courting and Sparking: Wooing Consumers’ Interest in the EVMarket,” IEEE Electrification Magazine,vol. 1, no. 1, pp. 21-31, Sept. 2013.


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