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.