The Development of Control Unit in Automotive Electric Power Steering System

Electric power steering system (EPS) uses an electric motor to provide essential control to the driver. The EPS system uses variable assist, that provides more assistance as the speed of a vehicle decreases, on the contrary, it provides less assistance. This functionality requires a delicate balance of power and control that has only been available in recent years. The EPS system has been used to replace traditional hydraulic power steering system (HPS), EPS systems are used in high-end and low-end vehicles widely, they are destined to become mainstream among automotive manufacturers soon. In this paper, the control unit of the column assist type EPS system with a DC motor is presented. The hardware circuit, coupled with the appropriate software development, can effectively meet the needs of the electric power steering system.