Dynamic Stability Analysis Of Atse Contacts And Design Of Electrodynamic Compensation Structures

Automatic transfer switching equipment is applied to the important occasion where the uninterrupted power system is required.When the fault was detected by the checkout equipment,the switch takes the load to the backup power.It is very important for the switch electrical equipment to avoid contact bounce or welding due to the impact current.So it is very important to research the electrodynamic force and compensation structure of contact.Based on the finite element analysis(FEA)technology,the contact dynamic stability of the ATSE was analyzed in this paper.Moreover,the characteristics of several different electrodynamic force compensation structures were analyzed,and a new type contact electrodynamic force compensation structure was proposed.First of all,according to the contacts design model of the product in Pro/ENGINEER,the 3D model was rebuilt in ANSYS,which was conductive to the parametric analysis of the contact structure.By using ANSYS,the electrical-magnetic coupling field of the contact parts was analyzed,and distribution vector diagrams of current density,magnetic induction intensity,and electrodynamic force distribution etc.of the contact structure were obtained.In this way,the influence factors of the electrodynamic force can be seen directly.The dynamic stability of the contact was analyzed.Then,four typical electric power compensation structures were introduced.The first three compensation structures that met the original model design conditions were analyzed,obtaining the results of different compensation characteristics and compensation ability.It could be used for reference in the design of the contact structure.By developing a window program which could call the ANSYS to process the analysis of electrodynamic force,designers in non-related majors could be convenient to conducting dynamic stability analysis for contact model.In addition,by calling the calculation,the problem that the simulation electrodynamic force needs multiple iterations in the case that contact work in the alternating current and constant current has been further analyzed.In the end,a new "C" type rotary electrodynamic force compensation structure has been proposed by analyzing the typical compensation structure.It not only made the contact suffer as small as possible electrodynamic repulsion force when work normally,but also increased the electrodynamic repulsion force to help the contact breaking fast.ANSYS zero-order optimization algorithm was used to optimize the new contact structure,which further improved its advantages.