Research Status and Future Trends of Energy-saving Technologies for Permanent Magnet Synchronous Motors in New Energy Vehicles

In the context of the global energy structure transformation and the deep advancement of the "dual carbon" strategy, energy conservation and emission reduction in the transportation sector have become a key link in achieving the carbon peak target, and the energy efficiency level of the drive system of new energy vehicles plays a decisive role in the energy consumption of the entire vehicle. Permanent magnet synchronous motors, with advantages such as high efficiency and high power density, have become the mainstream drive motors for new energy vehicles, and the research on their energy-saving technologies has become a research hotspot in the industry. This paper uses the methods of systematic literature review, comparative study and econometric analysis to systematically review the current research status of energy-saving technologies of permanent magnet synchronous motors for new energy vehicles from four dimensions: material system, structural design, control strategy and thermal management system, and deeply analyze the existing technical bottlenecks such as insufficient energy efficiency stability under extreme conditions and high cost of high-performance materials. And further predict the future development trends of technologies such as material diversification, structural integration, control intelligence and energy interconnection. Research shows that breakthroughs in permanent magnet synchronous motor energy-saving technology require collaborative innovation in multiple fields such as materials, structures, and control, and system-level energy-saving collaboration will become the core direction of future research. This paper provides theoretical and engineering references for the research and development of permanent magnet synchronous motor energy-saving technology and the energy-saving upgrade of the new energy vehicle industry.