Enhanced Control Algorithm in PMSMs with Machine Current Sensor FDI and Current Management for Hardware Protection

Abstract

This paper proposes an enhanced control algorithm in permanent magnet synchronous machines (PMSMs) with machine current sensor fault detection and isolation (FDI) and current management for hardware protection. Different from existing work on machine current sensor FDI, the proposed method addresses the sensor FDI problem under co-existence of PMSM current sensor and non-sensor imbalance faults, and thereby help prevent the controller performance degradation caused by a faulty machine current sensor signal. Meanwhile, hardware protection is achieved through the proposed algorithm which has a unique feature of providing online overcurrent regulation and source power management at the same time to enhance protection of power inverter and power source. Benchmark comparison of the proposed sensor FDI method to state-of-the-art techniques is carried out to validate the good performance of the proposed FDI method in terms of fault detection time, false detection rate and missed detection rate. Sensitivity analysis of the proposed current management algorithm with overcurrent regulation and source power management is performed under changing rotor flux linkage and machine stator d-axis self-inductance, as an example to demonstrate the robustness of the proposed algorithm for hardware protection against system parameter variations. The effectiveness of the proposed algorithm is confirmed by simulation results in MATLAB for a PMSM.

Keywords:

• current management
• current sensor
• FDI
• hardware protection
• non-sensor fault
• overcurrent regulation
• PMSM
• sensor fault
• source 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 towards 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 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.