Abstract:

E-type AC contactors are often used to frequently connect and disconnect medium and small capacity AC main circuits.The material utilization rate of the electromagnetic system is low and the contacts bounce is violent during the closing process.However,there is a certain slope angle and direction relationship between the center column and the side columns in E-type iron core with inclined pole sutface.If the design is improper,the iron core will be affected by the lateral component of electromagnetic attractive force which makes the closing process unstable.The multi-physics coupling joint simulation model is established.On the basis of considering the factors such as the angle of core inclined plane,magnetic ringstructure and energy and material saving,the electromagnetic system is optimized with the multi-strategy fusion particle swarm algorithm.According to the optimized results,a prototype is made and verified by experiments.The results show that the optimized inclined pole surface AC contactor can save energy and materials,reduce contact bounce,and has good dynamic characteristics and economic benefits.

Key words: E-type AC contactor, inclined pole core, energy and material saving, optimization design