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Electromagnetic Field Analysis and Design of an Efficient Outer Rotor Inductor in the Low-Speed Section for Driving Electric Vehicles

EV Components and Materials Research and Development Group, Korea Institute of Industrial Technology, Gwangju 61012, Korea
Department of Electrical Engineering, Chonnam National University, Gwangju 61186, Korea
Robotics and Virtual Engineering, Korea University of Science and Technology, Daejeon 34113, Korea
Author to whom correspondence should be addressed.
Energies 2019, 12(24), 4615;
Received: 4 November 2019 / Revised: 29 November 2019 / Accepted: 3 December 2019 / Published: 4 December 2019
(This article belongs to the Special Issue Advances in Rotating Electric Machines)
Currently, the eco-friendly vehicle market is growing continuously. In the automobile industry, various electric vehicle models are being developed, and several technological innovations are being made. Certain limited vehicle types, such as passenger cars, are being converted to electric vehicles; moreover, a variety of small electric vehicles, including smart mobility vehicles, are being developed. The driving motor of an electric vehicle, e.g., a brushless Direct Current motor (BLDC), is one of the key components that determine its driving performance. However, since the recent hike in prices of the rare earth magnets used in BLDCs, the development of induction motor with lower cost and a simple product structure has become essential. Therefore, this study proposes an optimized design for an outer rotor induction motor with high efficiency in the low-speed section for electric vehicles. The motor designed in this study is efficient for speeds less than 1000 rpm, and our experimental results prove that the prototypes can provide up to 84.8% efficiency. This optimized motor is expected to have widespread application in the eco-friendly vehicle market. View Full-Text
Keywords: outer rotor inductor; electric vehicle; high-efficiency; eco-friendly outer rotor inductor; electric vehicle; high-efficiency; eco-friendly
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MDPI and ACS Style

Hwang, M.-H.; Lee, H.-S.; Yang, S.-H.; Cha, H.-R.; Park, S.-J. Electromagnetic Field Analysis and Design of an Efficient Outer Rotor Inductor in the Low-Speed Section for Driving Electric Vehicles. Energies 2019, 12, 4615.

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