1. Simulation setting problem: Before simulation, simulation parameters need to be set, such as the material, geometry and boundary conditions of the motor. If the settings are incorrect, the simulation results may be inaccurate or the waveform diagram may not appear.
2. Result output: In the simulation process, you need to set the output mode and format of the results, such as the type, name and path of the output file. If the settings are incorrect, the waveform diagram may not be output.
3. Software version problem: There may be differences between different versions of ANSYS software, and some versions may not support certain functions or operations. If the old version is used, the waveform diagram may not appear.