Design And Optimization Of Electromagnetic Mechanism For Automatic Transfer Switching Equipment

ATSE(Automatic Transfer Switching Equipment),as the switch device for important loads such as military,hospitals and fire,plays an important role in stability and continuity of power supply system.Electromagnetic mechanism is one of the critical parts of ATSE.By controlling the action of the electromagnetic mechanism,the ATSE will realize the transfer between the “common road” and the “alternate road”.Based on the technical requirements of the new type of ATSE,the electromagnetic mechanism was designed and optimized in this paper.Firstly,the electromagnetic mechanism was designed.The working principles of the contact mechanism and the transmission mechanism of the ATSE were studied.The characteristic of minimal reaction force was analyzed and the structure parameters of the magnetic material and the coil were calculated.Based on these structure parameters,the scheme of electromagnetic mechanism design was set up.Secondly,the static characteristic s and the dynamic characteristics of electromagnetic mechanism were simulated and analyzed.The three-dimensional finite element model of electromagnetic mechanism was established by ANSYS.Then,the static characteristics of electromagnetic mechanism were simulated and the electromagnetic force was calculated in the different currents and the different positions.Based on VC,the finite element software ANSYS was developed secondarily.The dynamic characteristics of electromagnetic mechanism was simulated by using ADAMS.The curves of velocity,attractive force of armature and current of coil in pulling-in process were obtained and the data was analyzed.The results proved the feasibility of scheme.Then,the optimization design and the tolerance design of electromagnetic mechanism were studied.When optimization variables and optimization objectives were determined and constraint conditions were added,the structure parameters of electromagnetic mechanism were optimized by use of the genetic algorithm.By optimization,the performance of the attractive force was improved and the material was saved.Besides,tolerance design was considered.The error factors of tolerance design were determined and orthogonal experiment table was designed.Static attractive force was calculated when error factors were in different level.Then,the influence of each error factor was analyzed by the method of contributive rate analysis.The main error factors which effect electromagnetic attractive force were found.The reasonable tolerance range for each factor was distributed to reduce the unstable influence on electromagnetic attractive force caused by the fluctuation of structure parameters and promote electromagnet's reliability.Finally,the electromagnetic attractive force test of electromagnetic mechanism was carried on.The prototype of electromagnetic mechanism was produced.The experimental system was built and the attractive force performance was tested.By comparison of the actual test value with simulation value,the result showed that the electromagnetic mechanism design can meet the requirements of the target.