| Flywheel energy storage system is a kind of storage device which stores mechanical energy.It has many advantages,such as small volume,light weight,high energy density,high energy conversion efficiency,zero pollution and so on.It has been applied and developed in military,aerospace and other fields.With the progress of the society,the demand for the flywheel energy storage system is getting higher and higher.In this dissertation,a new type of flywheel energy storage system is proposed to further reduce the two aspects of the quality of the flywheel energy storage system,the volume convenient movement and the reduction of the energy loss of its working process.The motor rotor is integrated with the rotor of the flywheel battery..In this paper,the following research is done for the developed flywheel battery system.In order to solve the problem that the current flywheel energy storage system has a large volume,high quality and energy loss during the process of charging and discharging the rotor of the motor,the structure of the integrated flywheel battery is designed,which combines the rotor of the flywheel with the rotor of the motor.The integrated structure can reduce the volume and quality of the flywheel battery to a great extent,and effectively reduce the energy loss of the flywheel battery,and improve its efficiency.In view of the problem of magnetic field distribution in switched reluctance motor,this paper adopts a design scheme of switched reluctance motor,and uses this design to calculate the structural parameters of switched reluctance motor.The design parameters are modeled by Ansoft Maxwell software,and the magnetic field analysis of the three working positions is carried out,and three different switched reluctance motors are obtained by analysis.In the same working position,the distribution of the internal magnetic field conforms to the principle of "minimum magnetoresistance",and the torque of the switched reluctance motor in these three positions is obtained,which provides help for the analysis and contrast of the coupled magnetic field below.In view of the internal magnetic field distribution and the force condition of the supporting system,this paper uses Ansoft Maxwell software to simulate the axial displacement of the axial electromagnetic bearing rotor when the axial displacement of0.00 mm,0.15 mm and 0.29 mm is produced and the radial displacement of the radial electromagnetic bearing rotor produces 0.00 mm,0.10 mm and 0.21 mm,and the magnetic induction intensity map of the axial and radial electromagnetic bearings is obtained by simulation.The characteristics of the internal magnetic field distribution are analyzed.At the same time,the force conditions of the axial and radial electromagnetic bearings are analyzed.The axial force of the axial electromagnetic bearing rotor generated by the axial migration of 0.00 mm,0.15 mm,0.29 mm is 2.34 N,1061.3N,2365.7N,respectively.The radial force of radial electromagnetic shaft bearing rotor produces 0.00 mm,0.10 mm,and0.21 mm radial force is 0.96 N,148.8N,433.4N.It provides help for the comparative analysis of axial and radial electromagnetic bearings in the following field coupling analysis.In view of the influence of the internal coupling magnetic field of the integrated flywheel battery,the magnetic field simulation of the switched reluctance motor,radial electromagnetic bearing and axial electromagnetic bearing is carried out in this paper.When the switched reluctance motor is located at position one and position two,the magnetic field coupling analysis is carried out when the axial and radial electromagnetic bearings do not shift and shift,and the coupled field will be analyzed.When the axial and radial electromagnetic bearings do not shift,the changes of the axial and radial electromagnetic bearings do not exceed 2N and are very small.When the axial and radial electromagnetic bearings are offset,the radial force of the axial electromagnetic bearing does not exceed 0.5N,the change of the axial force does not exceed 1%,and the radial force changes of the radial electromagnetic bearing are not over super.After 1%,the change of the axial force does not exceed 0.5N;the magnetic field distribution characteristics of the switched reluctance motor and the axial and radial electromagnetic bearings have been analyzed in a single analysis,and the torque of the switched reluctance motor is smaller.The integrated appeal study shows that the internal magnetic coupling of the switched reluctance motor integrated flywheel energy storage system has little influence on the radial and axial electromagnetic bearings,which can be ignored directly;the coupling magnetic field makes the torque of the switched reluctance motor smaller and the speed of the flywheel rotor to some extent. |
