Design And Characteristic Analysis Of Linear Generator For Superconducting Maglev Train

Nowadays,the transportation of the railway in the world have a vital role in the industry,to improve the running speed of railway vehicle,the task of each country is imperative,however,the traditional wheel/rail friction between wheel and rail barrier made in train train hard to achieve higher speeds,so there is no traditional wheel/rail system of high-speed maglev train has won the favour of people.However,the wheelrail system is not the only limitation for trains to reach ultra-high speed.The traditional contact mode of power supply is another major factor hindering high-speed trains.In order to adapt the maglev train to a higher speed,we need a non-contact on-board power supply without solid friction.Induction collector system comes into being with its advantages of no contact,no noise,safety and easy maintenance.This thesis focuses on the analytical calculation of the contactless linear generator for high-speed superconducting maglev train and the design of its induction collector system.Firstly,this thesis introduces the origin and development history of maglev train,and investigates the status quo of high-speed maglev train at home and abroad in recent years,and introduces the classification of maglev train and the application of linear motor in maglev train.Secondly,several contactless power supply technologies are introduced,their working principles and their advantages and disadvantages are briefly explained.Taking the linear power generation of German TR08 maglev train and Test car on Japan yamanashi test line as an example,this thesis introduces the structure and working principle of the linear generator,and summarizes the research achievements of the linear generator for maglev train at home and abroad.Then,this thesis studies the electromagnetic coupling between the superconducting coils and the levitation coils in the background of the Japanese superconducting repulsion maglev MLX01 train.This includes the magnetic field analysis of the superconducting coils,the induced current and voltage of the power collecting coils,the induced magnetic field of the levitation coils and its harmonic analysis.The above analysis provides a basis for the design of contactless linear generator.The research on the dynamic induction mechanism of non-contact linear generators is focused on,and the coupling analytical relationship between the induced voltage,generating power and coil type of the train operating speed-collector system is established,which provides atheoretical basis for the design of linear generators for superconducting high-speed maglev trains.Then,the section size,pole distance,length and width of induction power collecting coils in the linear generator are designed,and the coupling analytical relationship of train running speed-induction voltage-generation power-coil type of collector system is established.Then,according to the design requirements and combined with the characteristics of MLX01 train,the structure and size of the contactless linear generator that can meet the on-board power supply demand of the superconducting maglev train are finally determined.Finally,the forces on the train moving direction and the vertical direction of the power collecting coils are studied,and the relationship between the electromagnetic force on the collector coil and the power factor Angle of the circuit is obtained.Then the control strategy of the power collecting coils is put forward,and the effect of the collector coil on the magnetic damping when the train body vibrates in the vertical direction is expounded.