Abstract
This paper presents a detailed investigation of AC copper losses in high-speed high-power density permanent magnet synchronous machine. For parallel strands winding, it is not easy to accurately estimate the AC copper losses using finite element model (FEM), due to the random distribution of the conductors inside the slots. Therefore, this work is focused on the separation of the AC copper losses component from the total measured losses. In order to obtain more precise results, the effect of manufacturing process on the stator core has also been considered. A 3D FEM has been used to evaluate the total power losses including the effect of the end-windings. Finally, the influence of the temperature on the AC losses is taken into account by monitoring the winding temperature during the experiments.
Highlights
F OR high-speed and high-power density applications, where the machine needs to achieve high efficiency over all the operating range, an accurate prediction of power losses distribution is very important [1]
Less attention was paid to the segregation of the AC copper losses from the total measured losses considering the effect of manufacturing process on the stator core
The aim of this work consists in identifying the AC copper losses at different operating frequencies and temperatures, by considering the impact of manufacturing process on the stator core
Summary
F OR high-speed and high-power density applications, where the machine needs to achieve high efficiency over all the operating range, an accurate prediction of power losses distribution is very important [1]. The specific core losses increase and inaccuracies are introduced when the AC copper losses are segregated from the total measured power [10,11,12]. This effect becomes more significant during high frequency operations. The aim of this work consists in identifying the AC copper losses at different operating frequencies and temperatures, by considering the impact of manufacturing process on the stator core. The experimental characterisations of the magnetic material properties for the stator core are analysed
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