This project covers multiple disciplines and is an integrated research on cross-disciplinary cutting-edge technologies. The main technical fields include: vehicle engineering, mechanical design and theory, electronic engineering, control theory and applications, signal detection and processing, etc. Electrical Power Steering (EPS) is a high-tech and high-growth product that closely follows the development theme of energy conservation and environmental protection. It is an inevitable development trend of steering systems; it is also a key system related to safety in vehicles. At present, EPS from Europe, North America and Japan has been successfully applied on a large scale to mature models in the market, and the technology is relatively mature. In contrast, China's local enterprises generally focus on developing EPS systems driven by low-power brush motors. This type of EPS system development technology is generally immature and has low reliability, causing a large number of after-sales problems. The high-power brushless motor EPS is still in the research and development stage and has not yet achieved industrialization and mass supply. However, SAIC and domestic new energy vehicles urgently need high-power EPS. For high-power EPS systems, the sky-high development costs abroad are unsustainable, and the time schedule cannot meet the project node requirements; at present, the domestic inability to control such key EPS technologies is still controlled by others. Therefore, in order to achieve breakthroughs in independent development and industrialization in key automotive assemblies and components, the Technology Center of Shanghai Automotive Group Co., Ltd. has joined forces with Lianchuang Automotive Electronics Co., Ltd. and Shanghai ZF Steering System Co., Ltd. to use SAIC E50 pure electric vehicle development as a carrier, successfully developed an electric steering system powered by a column-type brushless motor for this vehicle model; at the same time, the development and production capabilities of EPS core components such as columns and controllers have been formed. The main research contents include: system matching design of high-power electric steering systems, high-power controller design and control strategy, EPS fault diagnosis, design and manufacturing technology of key mechanical parts, EPS testing capacity building, vehicle debugging and calibration of EPS systems, research content such as technology, production capacity building of EPS systems and controllers. The success of this project has enabled the independent development and production of EPS systems, got rid of foreign technical blockade and market monopoly on EPS, met the technological upgrade needs of domestic vehicle manufacturers, and especially realized the industrialization of EPS, the core system of new energy vehicles. The implementation of this project is of great significance to the development and strategic implementation of SAIC and domestic new energy vehicles.