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Research conducted previously has shown that a battery electric vehicle (BEV) motor design incorporating drive-cycle optimization can lead to achievement of a higher torque density motor that consumes less energy over the drive-cycle in comparison to a conventionally designed motor. Such a motor indirectly extends the driving range of the BEV. Firstly, in this paper, a baseline fractional slot concentrated...
Understanding the need for improvement in efficiency of an electric vehicle drivetrain system, this paper exclusively discusses various design aspects of a permanent magnet machine drive for direct-drive electric vehicles (EV). Firstly, the motivation to employ a direct-drive configuration in EV is discussed. Thereafter, initial electric machine rating design considerations for a typical Supermini...
Permanent magnet synchronous machines (PMSMs) are the most popular motors being used as traction motors in the electric drive-train due to their high torque-per-ampere characteristics and potential for wide flux-weakening operation to extend the constant power range. This paper classifies and overviews the state-of-the-art flux-weakening control strategies for PMSMs. The advantages and disadvantages...
In this paper, an analysis of the steady-state operation of an interior permanent magnet synchronous motor (PMSM) is conducted using the classical d-q model. The basic model of an under-excited PMSM is simulated for various loading conditions and the results are discussed to better understand the operation of PMSMs. The d- and q-axis magnetizing reactances are calculated using the PMSM design specifications...
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