Simulation Study on On-Line MTPA/MTPV Trajectory Tracking in PMSMs with Power Management

Abstract

This paper proposes an on-line maximum torque per ampere (MTPA)/maximum torque per voltage (MTPV) trajectory tracking method in permanent magnet synchronous machines (PMSMs) with power management. The on-line MTPA/MTPV machine current trajectory tracking algorithm is developed from PMSM model. Maximum source current and machine current are regulated to enhance hardware protection during machine current trajectory tracking. The maximum source current management is achieved by iterating within the current trajectory tracking algorithm over continuous torque command modifications based on power flow analysis, and the maximum machine current management is achieved by torque command limiting based on current angle modulation. Different from the existing techniques in literature, the proposed method has an unique feature of providing on-line regulation of source current, while maintaining on-line MTPA/MTPV trajectory tracking in PMSMs. It also provides machine and inverter overcurrent regulation to enhance their protection. In addition, the proposed method is flexible to tune and does not require off-line calibration. The effectiveness of the proposed method is confirmed by simulation results in MATLAB.

Keywords:

• current trajectory
• hardware protection
• MTPA
• MTPV
• overcurrent
• PMSM
• power management

Additional information

Notes on contributors

Haibo Li

Haibo Li is an Applications Engineer in Power Integrations, San Jose, CA. He is currently working part-time toward his Ph.D. degree in electrical engineering at the University of Nebraska-Lincoln. Prior to joining the University of Nebraska-Lincoln in August 2013, he received a B.Eng. degree in Electrical Engineering from Anhui University, Hefei, China, in 2012. His research interests include electric motor drives, power electronics, and renewable energy.

Yi Qian

Yi Qian is a professor with the Department of Electrical and Computer Engineering, University of Nebraska-Lincoln (UNL), Lincoln, NE, USA. Prior to joining UNL, he worked in the telecommunications industry, academia, and the government. Some of his previous professional positions include serving as a Senior Member of the Scientific Staff, a Technical Advisor with Nortel Networks, a Senior Systems Engineer, a Technical Advisor with several startup companies, an Assistant Professor with University of Puerto Rico at Mayaguez, and a Senior Researcher with National Institute of Standards and Technology. He is serving on the editorial boards for several international journals and magazines, including serving as the Editor-in-Chief for IEEE Wireless Communications Magazine. He is a Fellow of the IEEE. His research interests include information assurance and network security, network design, wireless ad-hoc and sensor networks, vehicular networks, smart grid communication networks, broadband satellite networks, optical networks, high-speed networks, and the Internet.

Sohrab Asgarpoor

Sohrab Asgarpoor received the B.S., M.S., and Ph.D. degrees in electrical engineering from Texas A&M University, College Station, TX, USA. From 1986 to 1989, he was with ABB Network Management Inc., as a Lead Engineer. Since September 1989, he has been with the University of Nebraska-Lincoln, Lincoln, NE, USA, where he is currently the Associate Dean of Undergraduate Programs with the College of Engineering, and a Professor with the Department of Electrical and Computer Engineering. His research interests include reliability evaluation, maintenance optimization, and advanced computer applications in security and optimization of power systems.

Hamid Sharif

Hamid Sharif is the Charles J. Vranek distinguished professor in the Department of Electrical and Computer Engineering at the University of Nebraska-Lincoln. He is also director of the Advanced Telecommunications Engineering Laboratory (TEL), University of Nebraska. Professor Sharif has authored/co-authored more than 250 refereed research articles in international journals and conferences and has been a recipient of a number of research awards and best papers. He has been serving on many editorial boards for IEEE and other international journals. His research has been funded by major US government agencies and industries. He is a Fellow of the IEEE. His research interests include security in communication networks, wireless sensor networks, multimedia security, network modeling and simulations, and embedded systems.