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Abstract
Abstract—This article describes the development of a line start permanent magnet synchronous motor with a rotor containing interior mounted magnets. The rotor is a hybrid of both circumferentially as well as radially magnetized magnets arranged so it produces consequent poles. Steady-state and transient performances of the line start permanent magnet synchronous motors have been analyzed by using time-stepping finite-element analysis. Simulation results show that the optimum performance of the rotor is achieved for a specific magnet volume, a substantial improvement on performances of all such rotors reported so far (based on the detailed study of all these rotor types). The hybrid rotor has improved the synchronous performance of the machine without degrading its starting characteristics when compared with an equivalent induction motor. Two experimental prototypes of the proposed design have been built in the laboratory, and their performances have been compared with the performance of a conventional line start permanent magnet synchronous motor having only circumferentially magnetized magnets in its rotor, as well as that of a standard induction motor of the same frame size and physical dimensions. The results indicate that the proposed hybrid interior rotor significantly improves machine performance.
Additional information
Notes on contributors
Rajaram T. Ugale
Rajaram T. Ugale was born in Pune, India on September 27, 1974. He received his B. E. Electrical and M. E. Electrical (Power Systems) degree from University of Pune, in 1998 and 2001 respectively. He joined College of Engineering Pune in June 2002 as a Lecturer in Electrical Engineering. Presently he is pursuing Ph. D. program at College of Engineering Pune. His areas of interest are electrical machines and electrical system design.
Bhalchandra N. Chaudhari
Bhalchandra N. Chaudhari was born in Jalgaon, India on September 13, 1967. He received his B. E. Electrical and M. E. Electrical degrees form Dr. B. A. Marathwada University at Auraugabad, in 1987 and 1991 respectively. He completed his Ph.D. in 2001 from Indian Institute of Technology, Bombay. He joined Government College of Engineering Aurangabad in March 1990. Presently, he is Professor of Electrical Engineering at College of Engineering Pune, India. His interest areas are permanent magnet machines, power electronics, drives and power quality.
Srinivas Baka
Srinivas Baka was born in Guntur, India on June 24, 1982. He received his B. E. and M.Tech. Electrical degree in 2006 and 2009 respectively. His interest areas are electromagnetic fields, circuit analysis and electrical machines.
Ashutosh Pramanik
Ashutosh Pramanik graduated in Electrical Engineering from Glasgow University. He holds a M. Sc. (Engg.) degree from University of Birmingham and a Ph.D. from the same University for his research on developing analytical solutions for the three-dimensional eddy-current problems. He has been a research engineer with the English Electric, Stafford (now part of GEC, UK) and Lecturer at the University of Leeds. After nearly 18 years of research and teaching experience in the UK, Dr. Pramanik in 1976 joined the Corporate R and D Division of BHEL where he successfully established the Electromagnetic Phenomena Laboratory. Since 2008 he is working as Emeritus Professor of Electrical Engineering at College of Engineering Pune, India. Throughout his professional carrier he has been instrumental in making several scientific contributions in the field of electromagnetism.