| Due to the advantages of green,high efficiency and less pollution,the utilization value and application prospect of wind energy have attracted the attention of the international communities and relevant research institutions.Therefore,in order to effectively utilization and improve the utilization rate of the wind energy,a new type of deflectable double-stator switched reluctance generator is proposed for the single of the rotor rotation of the existing switched reluctance generator.The main structure of the generator consists of four parts: rotor,coil,internal and external double-stator.The outstanding advantage of the generator is that the spherical structure design is adopted between the stator and the rotor.At the same time,output bearing structure with one side of rotor can make the generator realize the deflection movement of a certain angle,which can adapt to different wind directions and various wind power generation occasions.Meanwhile,with the improvement of people's living standards and the enrichment of material life,the requirements for low vibration and low noise generators are higher and higher.Therefore,it is urgent to study the vibration problem of the deflectable double-stator switched reluctance generator.This paper mainly analyzes the vibration characteristics of generator under the coupling of multiple physical fields,and the multi physical field modeling is carried out.The specific research contents are summarized as follows:Firstly,the research status of traditional SRG at home and abroad are introduced,and then the structure of the deflectable double-stator SRG studied in this paper is introduced,and the basic structural dimensions of the generator are determined.Then the three-dimensional model of the generator is established by using the Finite Element Software,and the magnetic distribution of the generator coil is simulated and analyzed.Secondly,the theory of loss and heat transfer is analyzed theoretically.On this basis,the coupled numerical model of magneto-thermal-solid coupling field is established.The two-way and one-way coupling of magneto thermal coupling are simulated and summarized.The temperature rise,stress and vibration displacement of the stator system under the condition of internal and external double stators,rotation and deflection are obtained.The simulation results show that the two-way coupling analysis can better reflect the actual situation than the one-way coupling analysis.Then,the magnetic-solid coupling analysis is carried out.After the generator winding generates electricity,the magnetic potential is generated in the generator.According to the principle of minimum magnetic resistance,the electromagnetic force is generated between the air gap among the stator and the rotor.Under the excitation of electromagnetic force,the magnetic materials in the motor structure show elongation or shortening,and producingmagnetostrictive stress,which lays a good foundation for the analysis of the vibration and displacement of the stator structure caused by the electromagnetic force.Through the simulation analysis of the finite element software,the stress distribution and displacement vibration of the internal and external double-stator,rotation and deflection stator system are obtained.Finally,the experimental test platform is built.The vibration displacement data of the new generator is collected by using the vibration tester.The infrared thermometer is used to measure the temperature at different positions of the new generator when it reaches a stable state,and data collection is gotten at the same time.The data obtained from the above two experiments are analyzed and compared with the results obtained from the finite element simulation.The two curves have the same trend,which verifies the correctness of the experiment.At last,the shortcomings of the new generator are discussed.A new structure ofhigh power generator with double-stator and double-salient pole are proposed. |
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