| With the rapid development of the world economy and the continuous growth of the population in recent years,the travel pressure is increasing rapidly.At present,railway transportation still occupies the most important position in the transportation system all over the world.The low pollution,high speed and safety of the means of transportation have become the pursuit of the goal,and the maglev train has become a research focus in the field of rail transit due to a series of advantages such as high speed,strong climbing ability,environmental comfort and low noise.The maglev train fundamentally changes the structure of wheel rail adhesion of traditional rail transit vehicles,solves the problems of mechanical wear to a great extent,and realizes the suspension separation and high-speed running between the train and the track.At present,the speed of maglev train in operation can reach 400 km / h-500 km / h or even higher,but the traditional contact power supply mode hinders the further improvement of the speed,so a new type of non-contact power supply technology arises at the historic moment.Electromagnetic Suspension(EMS)and EDS(Electrodynamic Suspension,EDS)maglev trains have developed their own on-board linear generator systems,which use contact rail power supply and on-board battery power when the train is running at low speed.When a certain speed is reached,the electricity generated by the linear generator can be used to supply electricity to the vehicle and charge the battery.This thesis mainly focuses on the simulation and analysis of the linear generator of the EMS maglev train.Firstly,this thesis introduces the discovery of maglev technology,reviews the origin,application and development of maglev train,introduces the research status of maglev train at home and abroad in recent years,and simply classifies and introduces the maglev vehicles that have been put into operation in various countries.This thesis explains the advantages of non-contact power supply for maglev train,proves the necessity and significance of research on on-board linear generator,and briefly introduces several current non-contact power supply modes.Secondly,the evolution,classification and characteristics of linear motor are introduced.For EMS maglev train,the operation principles of propulsion,suspension and guidance are introduced in detail.Taking Germany TR08 and Shanghai airport line as examples,the train grouping situation and vehicle type data are introduced.The power generation principle of on-board linear generator is described in detail,which lays the foundation for later analysis.Then,the characteristics of on-board linear generator are studied by ANSYS finite element analysis,focusing on the variation of air gap magnetic field and the power generation characteristics of linear generator under different train operation conditions,such as different speed,different suspension height,different stator armature current and different excitation current,and the differences of power generation under different connection methods of power generation winding.Then,the electromagnetic analysis method is used to study the characteristics of the on-board linear power generation and compare with the simulation results of ANSYS.Finally,the influence of the linear harmonic generator on the overall performance of the train is studied,and the generator slot is optimized to take into account the electromagnetic force and good power generation characteristics. |
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