Zusammenfassung
For high-performance vehicles with a~single-speed gearbox, maximizing the gravimetric peak power and peak torque density combined with a~high maximum speed is the decisive design goal of the electric machine. A~low vehicle mass leads to a~high vehicle acceleration, while a~high maximum rotational speed leads to a~high top speed. Therefore, this work presents the design and optimization of a~high-speed, oil-cooled permanent magnet synchronous machine with a~novel circular sector-like permanent magnet shape and a~carbon fiber sleeved rotor in combination with cobalt iron laminations. The result is a~gravimetric peak power density of 50.9 kW/kg, a~gravimetric peak torque density of 30.8 Nm/kg, and a~maximum rotational speed of 30000 rpm. The use of two of these electric machines on one drive axle leads to a~gravimetric peak axle power density of 12.1 kW/kg and a~gravimetric peak axle torque density of 72.1 Nm/kg at system level, including electric machines, gearboxes and inverters.
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