Research On Electromagnetic Topology For Power Electronic Equipment In Locomotive

The theory of Electro-Magnetic Topology (EMT) is considerably developed in some nations like USA, France etc. This theory has been successfully applied in detecting the susceptibility of arm systems under the condition of electromagnetic radiating. Nevertheless, research on EMT in our country is far behind and no such research applied in locomotive has been found yet. Under this background, an electromagnetic topology model for power electronic equipment is presented and other related problems are discussed in this dissertation.Firstly, general procedures of EMT are summarized and some key factors are pointed out. Then the electromagnetic interference sources, the coupling paths and the EUT in CRH system are given and analyzed. In the following, EMT models for BTM and signal lines of GSM-R system are established.In order to get the weight function of BTM signal equipment, which characterizes the crucial coupling path for EMI, some experiments of cable coupling have been done. Two kinds of EMI are measured in the experiment, which are common-mode interference and differential-mode interference. Different grounding conditions are also considered in the experiment. Test data is obtained and coupling rules are concluded at last.After the presentation of EMT model for GSM-R signal lines which are subjected to the disturbance of remote plane electromagnetic wave, calculation and analysis processes are given in details. Finally, a comparison of time responses in the condition of two different types of exciters is made.Two contributions are made in this dissertation. The first one is the presentation of an EMT modeling for power electronic equipment in CRH, according to the research and accomplishment on high speed railway in China. The second one is the presentation of an experimental analysis method towards problem about how to handle quantitatively with EM coupling in near field.