A hybrid energy source based double-stator permanent magnet brushless motor drive for hybrid electric vehicles

This paper proposes a hybrid energy source (HES) based double-stator permanent magnet brushless motor drive (DS-PMBL) for hybrid electric vehicles (HEVs). The key is to design and apply a battery-ultracapacitor HES to the DS-PMBL HEV drive properly, incorporating the merits of both battery and ultracapacitor. The peaky charging and discharging currents are supplied or absorbed by the ultracapacitors. Both the system efficiency and the battery life are thus improved. Meanwhile, the dynamic voltage equalization of battery packs can be achieved by controlling ultracapcitors properly. The simulation results are presented to verify the validity of the proposed HES design.