Abstract
Keywords: Automotive, Hybrid Electrical System, ultracapacitor, buck-boost converter, hysteretic control, fuzzy control, Simulink models
This paper presents an investigation of the dynamics phenomena in the energy sources power interface for Automotive Hybrid Electrical System (AHES). The boost converter is used into an (AHES) as power interface between the PEM-Fuel Cells (PEMFC) as primary energy source and the battery stack as energy storage device. The battery DC bus is controlled to be in the specified range. In this paper we investigate the AHES without PEMFC source. Now the energy is delivery from battery and high load pulses are sustained by ultracapacitors stack under controlled buck-boost converter. The simulation results show that the buckboost converter behavior can be improved using a well designed control surface. The used Simulink models for the used AHES blocks and some design consideration are presented, too.