抄録
In this paper, a power management control strategy for Hybrid Electric Vehicle (HEV) based on Permanent Magnet Synchronous Machines-Electrical Variable Transmission (PMSM-EVT) is developed. This method introduces an intelligent strategy for vehicle's power distribution, during driving and braking, between the system's plants by Fuzzy Logic Control (FLC). This has been investigated throughout two main aspects. The first is the optimum power splitting between the Internal Combustion Engine (ICE) and the PMSM-EVT machines that controls the throttle angle degree of the ICE in order to make it work in a high efficiency region; and the second is optimizing the vehicle'energy capture at braking or deceleration. These goals have been accomplished by two FL controllers. Designing of these controllers are mainly based on the function and power ratings of each plant. Because of the EVT machines make the operation strategy of this type of HEVs different from the others, the building of the fuzzy variables (fuzzy rules, membership functions, boundaries and limits) is different. The fuzzy logic controllers were designed based on the state of charge of battery, vehicle's velocity and the vehicle's power. The strategy is validated by Energetic Macroscopic Representation (EMR) simulation model strategy based on the software Matlab/Simulink. The results show that the energy management strategy is effective to control the engine's operating points within the highest efficiency region as well as to sustain the SOC of the battery while satisfy the drive ability. The vehicle's performances have been analyzed throughout a combined trip driving cycle that represents the normal and the worst operating conditions.
