Research on Stress Design and Manufacture of the Fiber-Reinforced Composite Sleeve for the Rotor of High-Speed Permanent Magnet Motor

Abstract

As a key component to ensure the safety and stability of the surface-mounted permanent magnet motor rotor, stress research on the sleeve has long been a subject that has attracted researchers. Fiber-reinforced composite materials have the characteristics of high specific strength, high specific modulus, and low eddy current loss. The use of a fiber-reinforced composite material sleeve that can effectively reduce the thickness of the sleeve and structural weight, and can improve the power density of the motor is an inevitable trend of the development of high-performance permanent magnet motors. This paper summarizes the matching of fibers and resins of composite materials to the sleeve: the stress design criteria, stress calculation method, and stress influencing factors of the composite sleeve; two typical stress-forming methods of the composite sleeve; and the preloading effect of the sleeve, strength, and rotor prototype performance testing. This paper focuses on the application of tension winding technology in sleeve forming. Based on the characteristics of composite material layer synthesis, this method has the advantages of high forming efficiency, small forming damage, easy realization of stress design, and a high preloading effect. This method can meet the sleeve-forming requirements of high-performance, large-scale, high-speed permanent magnet motors. However, the application of the new high-performance material system in the existing research is insufficient, the research on the technological factors in the tension winding process is scarce, and the performance testing method after the sleeve preparation is single, which needs further research.