ELECTRICALLY DRIVEN VEHICLE AND METHOD OF CONTROLLING THEREOF

摘要

Motor driving that uses just the output of a rotating electrical machine, which uses power of a vehicle-mounted storage battery apparatus, can be applied to an electrically driven vehicle, within an area inside a maximum output line (350) for motor driving. The maximum output line (350) is comprised of straight-line portions that prescribe the upper-limit torque (TMmax) and upper-limit vehicle speed (VMmax) upon motor driving, and a curved-line portion that prescribes the upper-limit output power. When the upper-limit value (Wout) for output power from the storage battery apparatus is limited due to a rise in the electric-current load or decrease in the SOC of the storage battery apparatus, the driving range within which motor driving can be applied will become narrower. Operation within a high-revolution range where efficiency drops is avoided, by changing the upper-limit vehicle-speed (VMmax) for motor driving in accordance with the SOC and/or the electric-current load of the storage battery apparatus. This enables a long driving period to be secured, without being limited by the upper-limit value (Wout) for output power.