This paper presents the methods, rationale, and results of an analytical study to optimize a complete a.c. electric vehicle propulsion system. Given a set of performance parameters and operational criteria for a suitable vehicle, the necessary trade-offs, iterations, and analyses are described to properly size, select and match critical subsystem components. Based on the U.S. Department of Energy DSEP system, the details of such a study necessary to properly match the traction battery and the drivetrain components for a small van are described. Emphasis is placed on key issues such as battery power vs. energy capacity, system voltage levels, motor power and torque, number of transmission speeds and ratio step sizes, and power electronics considerations. (A)
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