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http://dx.doi.org/10.3795/KSME-B.2011.35.2.189

Assessment of Performance of Motor System for City Bus  

Lee, Yoon-Ki (Dept. of Automobiles, Chosun Univ. College of Science & Technology)
Myong, Kwang-Jae (Dept. of Automobiles, Chosun Univ. College of Science & Technology)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.2, 2011 , pp. 189-196 More about this Journal
Abstract
Recently, research and development of a hybrid system for passenger cars as well as for heavy-duty vehicles has become more intensive. An electric powertrain system using an electric motor can replace conventional gasoline and diesel engines. The electric motor has a higher efficiency, better acceleration performance, and is more comfortable than conventional powertrain systems; however, new methods for assessing power performance and energy convergence efficiency have to be investigated because the characteristics of an electric motor are entirely different from those of an internal combustion engine (ICE). In this study, an experiment was carried out on a motor (PMSM: Permanent Magnet Synchronous Motor) test bench. One simple driving mode and four other driving modes identified from real-world driving data of a city bus were selected to perform the experiment on the motor test bench. Then, methods for assessing the acceleration performance, energy convergence efficiency, regenerative effect, etc., were investigated. It was found that the energy efficiency of PMSM was about 90% and that 40% of demand energy was regenerated.
Keywords
Electric Powertrain System; Acceleration Performance; Assessment Method; PMSM; Energy Convergence Efficiency;
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