Abstract:

Aiming at the problem of the vibration of the moving circuit unit caused by the fracture of the shading ring in the AC contactor,the fracture resistance of the shading ring is optimized by reducing the impact of collision energy on the shading ring.The assembly stress of the shading ring is analyzed by the finite element method,and then the fracture mechanism of the shading ring is analyzed.The simulation results are verified by the mechanical durability test of the AC contactor.The influence of the shading ring assembly,turns of coil unit,reaction force of electromagnetic system and moving circuit unit structure of electromagnetic system on the fracture resistance of shading ring is studied by simulation.The results are verified by experiments.The results show that the proposed optimization scheme reduces the impact of collision energy on the shading ring,improves the fracture resistance of the shading ring,and provides the guidance for the design and optimization of the shading ring of AC contactor.

Key words: shading ring, collision energy, fracture resistance, optimization