Fuzzy logic global power management strategy for HEV based on permanent magnet-dual mechanical port machine

In last few years, the Dual Mechanical Ports (DMPs), based on Permanent Magnet Machines (PMSMs), are intensively researched to be used as an Electric Variable Transmission (EVT) in Hybrid Electric Vehicles (HEVs). However, there is a lack of research work on the area of global control strategy in EVT-based HEVs. In this paper, a novel global power management strategy is developed, which involves three Fuzzy Logic Controllers (FLCs) for strategizing the power flow and torque distribution. The FL controllers are designed based on the state of charge of the battery, vehicle's velocity, traction torque, and the vehicle's requested power. The integration of the studied system is accomplished via the Energetic Macroscopic Representation (EMR) simulation model strategy based on the software Matlab/Simulink. The PM-EVT based HEV system with the proposed power management strategy is validated by comparing to the Toyota Prius HEV. Also, the work involves the analysis of the role of drivetrain, energy management control strategy and the associated impacts of fuel consumption. The simulation results show that global control system is effective to control the engine's operating points within the highest efficiency region, exploiting of EVT machines for capturing maximum braking energy, as well as to sustain the SOC of the battery while satisfy the drive ability.