Tension design and stress optimization of carbon fiber sleeve for high-speed surface-mounted permanent magnet motor rotor

This paper examines the tension distribution and stress behavior of the carbon fiber sheath in high-speed surface-mounted permanent magnet motor rotors during the constant tension winding process. It analyzes whether the stress-induced under specific conditions satisfies the preload force required by permanent magnets due to centrifugal force. A finite element model of the rotor construction is created by integrating elastic mechanics theory with the equivalent temperature field method and the birth-death unit method of finite element analysis to evaluate the stress state of each component of the rotor. The results indicate that the constant tension winding method satisfies the preload requirement, there is a significant stress disparity among the various layers. Both analytical and numerical computation methods are applicable for determining the stress distribution patterns of multilayered wound carbon fiber sheaths. This research establishes a theoretical foundation for the optimal design of carbon fiber sheaths for high-velocity motor rotors