Thermal Structure Analysis and Optimization of the Feeding System of the Permanent Magnet Linear Synchronous Motor

Because of its high dynamic response speed and acceleration, high rigidity and positioning accuracy, the permanent magnet linear synchronous motor (PMLSM) is able to meet the requirements of high-speed precision CNC machine tools. However, its thermal problems have seriously hampered its development. This paper establishes a PMLSM temperature field model, designs a cooling structure, determines the boundary conditions of the finite element model and conducts computer simulation of the model. The result shows that the designed cooling structure can effectively alleviate the motors thermal problems.