中国电气工程学报（英文） ›› 2020, Vol. 6 ›› Issue (1): 22-40.doi: 10.23919/CJEE.2020.000002

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  • 出版日期:2020-03-25 发布日期:2020-04-09

Small Signal Stability of Three-phase and Six-phase Synchronous Motors: A Comparative Analysis

G. K. Singh1,*, Arif Iqbal2   

  1. 1. Department of Electrical Engineering, Indian Institute of Technology, Roorkee 247667, India;
    2. Department of Electrical Engineering, Rajkiya Engineering College Ambedkar Nagar, Akbarpur 224122, India
  • Online:2020-03-25 Published:2020-04-09
  • Contact: *Email: gksngfee@gmail.com
  • About author:G. K. Singh received his B.T. in Electrical Engineering from G. B. Pant University of Agriculture and Technology, Pantnagar, India, in 1981, and Ph.D. in Electrical Engineering from Banaras Hindu University, Varanasi, India, in 1991. He worked in the industry for nearly five-and-a half years. In 1991, he became a Lecturer at M.N.R. Engineering College, Allahabad, India. In 1996, he moved to the University of Roorkee, Roorkee, India. Currently, he is a Professor in the Electrical Engineering Department, Indian Institute of Technology, Roorkee. He has been involved in the design and analysis of electrical machines in general and high-phase-order AC machines in particular, as well as power system harmonics and power quality. He has coordinated a number of research projects sponsored by the CSIR and UGC, Government of India. He was a Visiting Associate Professor in the Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea, and Visiting Professor in the Department of Electrical and Electronics Engineering, Middle East Technical University, Ankara, Turkey. He also served as a Visiting Professor to University of Malaya, Malaysia for one year. Prof. Singh received the Pt. Madan Mohan Malaviya Memorial Medal and the Certificate of Merit Award 2001–2002 from The Institution of Engineers (India).
    Arif Iqbal received his B.T. and M.T. in Electrical Engineering, from Aligarh Muslim University, Aligarh, India, in 2005 and 2007, respectively. He has completed his Ph.D. from Indian Institute of Technology, Roorkee, India, in 2015. He has four years of experience in industry and academia in the field AC drives and power systems. Currently, he is working as an Assistant Professor in the Electrical Engineering Department, Rajkiya Engineering College Ambedkar Nagar, Akbarpur, India. His area of interest is multiphase AC machine and drives, power electronics, and renewable energy systems.

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Abstract: Small signal stability analysis is conducted for an asymmetrical six-phase synchronous motor in comparison with its equivalent three-phase counterpart. For this purpose, a linearized model of the six-phase synchronous motor is developed using the dq0 approach, which is used in eigenvalue criteria to determine absolute stability in comparison with its equivalent three-phase counterpart. The analysis includes a comparison of the variation in evaluated eigenvalues associated with the stator and rotor sides according to changes in both the three and six-phase machine parameters and working conditions. Key analytical results are experimentally investigated and validated on a test rig.

Key words: Linearized modeling, stability analysis, six-phase synchronous motor, three-phase synchronous motor