Optimizations of a permanent magnet machine targeting different driving cycles for electric vehicles

摘要: The paper assesses the influence of driving cycles on design optimizations permanent magnet machines for electric vehicle traction applications with objective to minimize total loss over a defined cycle while satisfying performance specifications and constraints. With help an efficient optimization methodology tool, against New European Drive (NEDC), Artemis Urban Cycle (Artemis), NEDC/Artemis combined are carried out using Finite Element (FE) based technique. It is shown that surface mounted machine studied in paper, results NEDC exhibit distinct characteristics terms torque, speed, energy distributions. Thus trends leading parameters such as split ratio, stator tooth width, turn number per coil usage very different. For NEDC, optimum inclines reduce high-speed copper iron loss; Artemis, it tries low-speed loss. Comparing three optimized motors targeting different cycles, observed they all have high efficiency wide toque-speed range, perform best their own target cycle, around 0.5% lower efficiency, or 10% higher other respect values. Compared motor result close 20% less magnets usage, making preferred target.