关键词: 碳刷, 冲击, 仿真, 破坏实验

Abstract: The research on the instantaneous impact force of the motor carbon brush ejection was relatively rare. Due to the difficulty of measuring the instantaneous impact force of the carbon brush ejection, The finite element analysis software was used to comprehensively study the force of the carbon brush during the entire process of ejection by the spring, and the conditions of the same cross-sectional area werecompared. The mechanical properties of single copper wire and multi-strand copper wire during the entire process of carbon brush ejection showed that the stress of multi-strand copper wire was smaller than that of single copper wire, and the tensile force of copper wire was also smaller. The tensile force of the carbon brush was tested by the destruction test, so as to make a reference for the simulation result. The research was helpful for the structural design and optimization of carbon brushes.

Key words: carbon brush, impact, simulation, destruction experiment