Study Of The Axial Magnetic Force Of Halbach Pmb By The Different Rectangular Cross Section Permanent Magnetic Rings

In order to improve bear the weight of permanent magnetic bearing(PMB)for wind power generator,so as to decrease start wind speed of wind power generator,improve the wind energy utilization rate,this paper,study of the magnetic force of HALBACH PMB by the different rectangular cross section permanent magnetic rings composing.First,based on magnetic charge method and virtual displacement method,this paper get two slender PM magnetic force formula,and a new magnetic force analytic model(MFAM)of two different rectangular cross section PM is established by complicated quadruple integral.The relationship between PM magnetic force and PM structure parameters is analyzed.The correctness of the analytical model is validated by ANSYS simulation.Then based on the analytical model,MFAM of Halbach PMB forming by different rectangular cross section is established,analyzed and calculated the PMB magnetic force.Finally,ANSYS is used to simulate and verify the MFAM.This paper solve the complicacy of numerical method calculation permanent magnet magnetic force,lack easy to calculative MFAM of two different rectangular cross section permanent magnet,and solve lack fast calculation MFAM of Halbach PMB forming by different rectangular cross section permanent magnet rings.The results shows that the MFAM and ANSYS simulation result are basically consistent,the MFAM calculate celerity The error meets the requirement of engineering.The MFAM provides technical support for Halbach PMB design and structure optimization,and have theoretical and practical value.