## 1 Introduction
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Research Object** & **Winding Angle** & **Fiber** & **Resin** & **Winding Tension** & **Test Method** & **Reference** \\ \hline Cylinder & 20\({}^{\circ}\)-80\({}^{\circ}\), 20\({}^{\circ}\) per time & T700 & Epoxy resin & - & Axial compression test & [13] \\ Composite tubes & Three-layer structure, & & T700-12K & Epoxy resin & - & Axial compression test & [14] \\ Hydrogen storage & Two-layer structure, & & T700-12K & Epoxy resin & 45 N & Axial compression test & [15] \\ Vogel & 30\({}^{\circ}\)/90\({}^{\circ}\)45\({}^{\circ}\)/90\({}^{\circ}\) & 60\({}^{\circ}\)/90\({}^{\circ}\) & & T800 & Epoxy resin & 50–600 N & NOL ring test & [16] \\ Motor rotor sleeve & Hoop winding & T700 SC-12K & - & 9–12 N & Tensile test & [17] \\ Fiber tow & Hoop winding & T700 SC-12K & - & 9–12 N & Tensile test & [17] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Research on the effect of winding angle and tension on the properties of carbon fiber composites. Figure 1: Schematic diagram of high-speed permanent magnet motor rotor. decreases with increasing winding angle, and the failure modes are brittle fracture, local buckling, and transverse shear. References [14; 15] prepared a protective sleeve in three layers according to winding angles of 90, 55, and 90\({}^{\circ}\), gradually increasing the thickness of the middle layer. Pipes with a diameter-to-thickness ratio of less than 20:1 fail by buckling, while those with a ratio greater than 20:1 fail by shearing. Reference [16] explored the relationship between winding angle and failure mechanisms of composite materials mixed with an aluminum layer protective sleeve. With the increase in the winding angle, the compressive strength of the protective sleeve decreases, leading to a change in the failure mode from fracture to local buckling. Reference [17] used NOL ring failure experiments to find that in the dry winding process, the strength of the protective sleeve first increases and then decreases with an increase in winding tension. The curing process leads to a decrease in the pretenison of fibers inside the protective sleeve. Reference [18] studied the effect of different pre-tension forces and winding drum diameters on strength loss during fiber winding through experiments. It was found that both affect fiber strength by changing the frictional force between fibers and equipment. However, this study was designed with a small winding tension. In addition, it has been found that the tension in fibers exerts a radial pressure on the inner composite, causing a relaxation of the tension in the fibers first wound on the core mold [19]. To solve this problem, some scholars have proposed reducing the remaining winding tension gradient of the composite by using a layered curing process [20]. Many scholars have studied the curing method of composite materials. For example, References [21; 22] studied the relationship between the curing method and the quality of composite materials. They found that increasing the curing pressure and temperature changed the viscosity and fluidity of the resin. High-toughness composites are easy to produce with curing defects under vacuum conditions. Reference [23] investigated the effect of stage curing on composite materials and found that stage curing is beneficial for reducing porosity content and improving product quality. Analyzing existing data, it was found that there are few studies directly on the composite sleeve technology for high-speed permanent magnet motors. Existing research mainly focuses on the theoretical design of sleeves and the molding process of composite materials, with the latter usually focusing on pressure vessels. Therefore, this paper proposes to study the relationship between the performance of composite sleeves for high-speed permanent magnet motors and the selection of resins, fibers, and winding process from the perspective of motor requirements.