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Dr. Chunyan Lai

Assistant Professor, Electrical and Computer Engineering


Dr. Chunyan Lai
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

ELEC 331  Fundamentals of Electrical Power Engineering


Research activities

Research activities

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

PhD position available on intelligent traction motor drives

To improve the reliability and efficiency of the EV tractionmotor drives, the proposed research is intended to adopt ArtificialIntelligence (AI) in condition monitoring and control of the Electric motordrive system.

 More informationabout the position:

       Masters degree in power electronics and controls,GPA over 85%, is preferred. Knowledge of traction motor, power inverter, AIbased techniques is essential.

       Experience in software tools such asMatlab/Simulink, PLECS, Ansys Electronic Desktop, Motor CAD, dSpace TargetLinkwill be an asset.

       Candidates should be capable of workingindependently and in teams.

       The position is partly funded by a collaboratingindustry and the students will be required to collaborate with the industrypartners.

       Doctoral candidates may be provided with aspecial entrance award to cover the international tuition fees.

       In addition, candidates will be eligible toreceive Graduate Teaching Assistantships from the Faculty of Engineering.

       Candidates are also encouraged to apply foradditional merit-based internal and external scholarships provided by ConcordiaUniversity, and various provincial and federal organizations.

       Candidates will be required to disseminate theirresearch results in leading international journals and conferences, and alsotravel to attend conferences to present their research. 

Interested candidatesare encouraged to send their applications to Dr. Chunyan Lai at Chunyan.lai@concordia.cawith their CV and academic transcripts. Please indicate “PhD in intelligent motordrive_your name” in the email subject line.



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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