Plenary Session Speakers
prof. Bülent Ertan

Bülent Ertan, Middle East Technical University, Turkey.

H. Bülent Ertan  received B.S. and M.S. degrees in Electrical and Electronics Engineering in 1971 and 1973 respectively from the Middle East Technical University (METU) in Ankara, Turkey and a Ph.D. degree from the University of Leeds, the UK in 1977.

He directed many industry-supported projects since 1977. He led the Intelligent Energy Conversion Group at TUBITAK (Turkish Scientific and Technological Research Council) Information Technologies and Electronics Research Institute (BILTEN) in Ankara Turkey, between 1999-2006. He was an executive committee member of the Center for Wind Energy, METU and also director of the Electromechanics laboratory between 2011-2017. Prof. Ertan was chairman of the Mustafa Parlar Education and Research Foundation in 2000 and he was a member of the executive board of this foundation until 2016.

He has published more than 150 journal and conference papers so far. He is co-editor of two books entitled “Modern Electrical Derives”, Kluwer Academic Publishers, Netherlands, 2000 (NATO ASI series) and ”Transformers: Analysis Design and Measurement” (CRC Press, 2013). Prof. Ertan is the holder of 6 national and international patents. He received the IEE Overseas Premium award in 1993 and an IEEE award in 2014, for his contributions to the IEEE standard “Trial-use guide for testing permanent magnet machines”.

Professor Ertan is the founder of the Aegean International Conference on Electrical Machines and Power Electronics (ACEMP). Prof. Ertan is a member of the Turkish Chamber of Electrical Engineers and member of IET (UK) and a senior member of IEEE. He is currently the Mechatronics Engineering Department chair at Atılım University, Ankara, Turkey.

Designing High Power Density Induction Motors for Electric Propulsion


Bulent Ertan, S. Koushan, M.S. Siddique

Designing high power density electric motors for propulsion has become an increasingly important issue in the past few decades. This is not only because electric vehicles are projected to become the main private transportation means in near future, but also because of the ever so important metro and railway transport requirements. Along with these application areas, electric aircraft propulsion is also coming into focus in recent years.

Electric motors for traction are required to have high torque density, high efficiency over a wide speed range and are required to be robust. In recent years, permanent magnet (PM) motors became the favorite choice for such applications because of their higher efficiency than other types of motors.  Increasing demand for permanent magnets is likely to cause supply problems. Therefore, permanent magnet-free alternative motor types are of much interest.

In this paper, the authors present the design of a 180 kW induction motor for railway application. This design has 3-times the power density of a commercial induction motor. The designed motor is manufactured and its test results are used for establishing an accurate finite-element model for the prediction of its performance.  This model is used to investigate the trade-off between various design parameters and efficiency in the design process. This investigation illustrates that the efficiency of an induction motor can be increased to about 1% of a similar PM motor.