Motor control of input-split hybrid electric vehicles |
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Authors: | J Kim N Kim S Hwang Y Hori H Kim |
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Institution: | 1. School of Mechanical Engineering, Sungkyunkwan University, Gyeonggi, 440-746, Korea 2. Argone National Laboratory, Chicago, IL, 60439, USA 3. Department of Electrical Engineering, University of Tokyo, Tokyo, 113-8654, Japan
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Abstract: | A motor control strategy for an input-split hybrid electric vehicle (HEV) is proposed. From a power characteristic analysis,
it is found that the powertrain efficiency decreases for speed ratios at which power circulation occurs. Using dynamic models
of an input-split HEV powertrain, a motor-generator control algorithm for obtaining high system efficiency is designed by
inversion-based control. The performance of the control algorithm is evaluated by the simulator which is developed based on
PSAT, and simulation results are compared with the test results. It is found that, even if the engine thermal efficiency is
sacrificed by moving the engine operation point from the OOL for the control strategy, improved overall powertrain system
efficiency can be achieved by the engine operation that gives a relatively high efficiency from the viewpoint of the overall
powertrain efficiency. The control algorithm developed can be used in design of future electric vehicles. |
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